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WO2019188414A1 - Mécanisme de remplacement de jante équipant à un testeur de pneumatique et procédé de remplacement de jante - Google Patents

Mécanisme de remplacement de jante équipant à un testeur de pneumatique et procédé de remplacement de jante Download PDF

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Publication number
WO2019188414A1
WO2019188414A1 PCT/JP2019/010846 JP2019010846W WO2019188414A1 WO 2019188414 A1 WO2019188414 A1 WO 2019188414A1 JP 2019010846 W JP2019010846 W JP 2019010846W WO 2019188414 A1 WO2019188414 A1 WO 2019188414A1
Authority
WO
WIPO (PCT)
Prior art keywords
rim
spindle
main body
spring body
testing machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/010846
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English (en)
Japanese (ja)
Inventor
敬志 住谷
優 住元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019041876A external-priority patent/JP2019174453A/ja
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to KR1020207030201A priority Critical patent/KR20200128749A/ko
Priority to US16/981,952 priority patent/US20210156765A1/en
Priority to CN201980021177.0A priority patent/CN111902707A/zh
Publication of WO2019188414A1 publication Critical patent/WO2019188414A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/02—Details of balancing machines or devices

Definitions

  • the present invention relates to a rim replacement mechanism and a rim replacement method provided in a tire testing machine.
  • tire testing machines capable of testing a plurality of tires having mutually different inner diameters or tread surface widths are known.
  • a plurality of rims respectively corresponding to a plurality of tire sizes are used.
  • a rim suitable for the size of the tire to be tested is attached to the spindle among the plurality of rims. Therefore, the tire testing machine includes a rim exchange mechanism that can attach and remove a rim to the spindle.
  • Patent Document 1 discloses an upper rim and a lower rim capable of sandwiching a tire, an upper spindle and a lower spindle that hold the upper and lower rims with their respective axes coaxial, and an upper spindle about the axis.
  • a tire inspection apparatus having an upper spindle housing that rotatably supports and an upper frame that holds the upper spindle housing is disclosed.
  • the tire inspection apparatus disclosed in Patent Document 1 includes a rim replacement mechanism that replaces an upper rim fixed to the upper spindle with a permanent magnet.
  • a plurality of permanent magnets that magnetize the upper rim are provided on the upper spindle of the tire inspection device around the axis of the upper spindle, and the upper frame presses the surface of the upper rim away from the upper spindle.
  • a detaching means for pulling the upper rim magnetized by the permanent magnet away from the upper spindle is fixed to the upper frame and cannot be rotated integrally with the upper spindle.
  • the rim replacement mechanism in a conventional tire testing machine further includes a lower spindle incorporating a magnet and a rim table on which a replacement rim is placed.
  • the procedure for removing the rim attached to the spindle is as follows.
  • the upper rim is pressed downward by the releasing means, the upper rim is removed from the upper spindle, and the upper rim is placed on the lower rim. Thereafter, the lower spindle is lowered in a state where the upper and lower rims are set (a state where the upper rim is disposed on the lower rim).
  • the lower spindle When the lower rim hits the rim table with the upper and lower rims set, the upper and lower rims are transferred from the lower spindle to the rim table.
  • the lower spindle further descends and stops at the lower limit position below the rim table.
  • the procedure (mounting procedure) for attaching the upper and lower rims to each spindle is as follows. First, the lower spindle rises from the lower limit position described above, and the upper and lower rims placed on the rim table are transferred to the lower spindle.
  • the upper rim is rapidly attracted to the upper spindle by the magnetic force (adsorption force) of the magnet. For this reason, the upper rim contacts the upper spindle vigorously. Since the impact force at the time of contact is very large, there is a problem that the contact surface (contact surface) between the upper rim and the upper spindle is easily damaged by this impact. Further, when the upper rim comes into contact with the upper spindle (at the time of magnetic attachment), a large impact sound is generated, which may deteriorate the working environment.
  • JP 2010-127848 (FIG. 2 etc.)
  • the present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine capable of alleviating an impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle. For the purpose.
  • an upper rim and a lower rim for sandwiching a tire, and an upper spindle to which the upper rim can be attached and detached, the upper rim being attached to the upper spindle.
  • An upper spindle having a lower surface in contact with the upper surface and having a permanent magnet for fixing the upper rim mounted on the upper spindle to the upper spindle by a magnetic force; and a lower spindle on which the lower rim is mounted
  • the rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include.
  • the upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle.
  • the lower position is a position below the upper position.
  • the lower position is determined by moving the main body portion downward toward the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim. It is a position that allows the upper surface to be separated downward from the lower surface of the upper spindle.
  • the spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
  • the length of the conveyance path F of the tire T in the conveyance direction of the tire T corresponds to the entire length of the tire testing machine 1.
  • the horizontal direction intersecting with the conveyance path F, more precisely, the horizontal direction substantially orthogonal to the conveyance path F corresponds to the depth direction of the tire testing machine 1.
  • the depth direction is also referred to as the left-right direction or the width direction of the tire testing machine 1.
  • the tire testing machine 1 includes a lubrication unit 2, a tire testing unit 3, and a marking unit 4.
  • the lubrication part 2 applies lubrication liquid to the bead part B of the tire T while rotating the tire T.
  • the tire test unit 3 detects a singular point existing in the tire T by performing a tire test while rotating the tire T coated with the lubrication liquid in the lubrication unit 2 in the spindle unit 9.
  • the marking unit 4 marks the tire T at a position in the circumferential direction of the tire T where the singular point exists.
  • the lubrication part 2, the tire test part 3 and the marking part 4 are arranged in that order along the transport path F from the upstream side toward the downstream side.
  • the lubrication part 2 is a part for applying lubrication liquid to the bead part B of the tire T carried in.
  • the lubrication unit 2 includes a pair of left and right first conveyors 5 that conveys the tire T in a posture in which the tire T lies horizontally, and a pair of left and right tires that are carried by the pair of first conveyors 5. And an application part 7 for applying a lubrication liquid to the bead part B (inner peripheral edge) of the tire T held by the pair of arm parts 6.
  • each of the pair of first conveyors 5 is a belt conveyor having a conveyor belt that is a loop-shaped belt forming an endless track, but the first conveyor 5 is limited to a belt conveyor system. Is not to be done.
  • Rotating rollers 8 are rotatably provided at the respective tips of the pair of arm portions 6.
  • the pair of arm units 6 sandwich the conveyed tire T from the left and right outer sides and bring the rotating roller 8 into contact with a tread surface that is an outer peripheral surface of the tire T.
  • the rotating roller 8 rotates so as to allow the tire T to rotate around an axis that faces in the vertical direction.
  • the application unit 7 is configured to be movable in the vertical direction.
  • the application part 7 has a brush shape and rises to a position where it comes into contact with the bead part B of the tire T held by the pair of arm parts 6 to apply the lubrication liquid to the bead part B.
  • the application unit 7 is returned to the position below the first conveyor 5 after application and stored.
  • the pair of first conveyors 5 conveys the tire T to which the lubrication liquid has been applied from the lubrication unit 2 to the tire test unit 3.
  • the tire test unit 3 includes a spindle unit 9, a drum 10, a pair of left and right second conveyors 11, and a rim table 13.
  • the spindle unit 9 holds the tire T so as to allow the tire T to rotate about an axis that is directed in the vertical direction.
  • the drum 10 has a cylindrical outer peripheral surface having a central axis facing in the vertical direction, and is disposed on the side of the spindle unit 9 so as to be rotatable around the central axis.
  • the pair of second conveyors 11 conveys the tire T conveyed from the lubrication unit 2 with the tire T lying down horizontally.
  • the rim table 13 has a horizontal rim mounting surface on which a plurality of rims 12 can be mounted.
  • each of the pair of second conveyors 11 includes an upstream conveyor 11a and a downstream conveyor 11b disposed on the downstream side of the upstream conveyor 11a in the transport direction.
  • Each of the upstream and downstream conveyors 11a and 11b is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
  • the tire test unit 3 further includes a rotation drive unit (not shown) that drives the spindle unit 9 to rotate.
  • the spindle unit 9 has an upper spindle 9a and a lower spindle 9b.
  • the upper spindle 9a and the lower spindle 9b are rod-like members that can rotate around a common axis that faces in the vertical direction.
  • Each of the plurality of rims 12 includes an upper rim 12a attached to the lower end portion of the upper spindle 9a and a lower rim 12b attached to the upper end portion of the lower spindle 9b.
  • the upper rim 12a and the lower rim 12b are arranged so that the tire T on the pair of second conveyors 11 can be sandwiched in the vertical direction.
  • Each rim 12 has a structure that is divided into an upper rim 12a and a lower rim 12b.
  • the drum 10 is arranged so that the outer peripheral surface of the drum 10 can come into contact with and separate from the tread surface of the tire T held by the spindle unit 9 in the radial direction of the tire T. It is arranged in the vicinity.
  • the test of the tire T is performed by rotating the tire T at a predetermined rotation speed in a state where the outer peripheral surface of the drum 10 is in contact with the tread surface of the tire T held by the spindle unit 9.
  • the drum 10 has a rotating shaft, and a load cell (not shown) for measuring a force or moment applied to the drum 10 from the rotating tire T is attached to the rotating shaft.
  • the tire uniformity is calculated based on the result measured by the load cell, and the circumferential position and the axial position where the repulsive force of the tire T is maximized are measured as “singular points”.
  • the tire test performed in the tire test unit 3 includes not only the measurement of the tire uniformity described above but also the measurement of the outer shape.
  • the tire T on which the “singularity” is measured is rotated by a predetermined angle by the tire test unit 3 and then sent from the tire test unit 3 to the marking unit 4.
  • the marking unit 4 includes a pair of left and right third conveyors 14 and a marking device 15.
  • the pair of third conveyors 14 moves the tire T in the transport direction while keeping the tire T lying horizontally.
  • the marking device 15 performs marking on a predetermined position of the tire T positioned on the pair of third conveyors 14 (for example, a predetermined position on the inner peripheral side of the tire T).
  • each of the pair of third conveyors 14 is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
  • the marking device 15 uses a mark such as a uniformity mark indicating the “singularity” identified in the tire test,
  • the tire uniformity is given to the circumferential direction position of the tire T having specificity.
  • a mark other than the uniformity mark may be given to the tire T.
  • the tire test unit 3 further includes a slide mechanism 22.
  • the slide mechanism 22 moves the pair of upstream conveyors 11a in the pair of second conveyors 11 in the left-right direction so as to contact and separate from each other along the left-right direction. This is an interval changing mechanism for changing.
  • the slide mechanism 22 is capable of sliding the pair of upstream conveyors 11a in the approaching / separating direction.
  • the slide in the direction in which the pair of upstream conveyors 11a come in contact with and away from each other moves the rim 12 corresponding to the changed size below the second conveyor 11. It is possible to remove from the rim table 13 located.
  • the distance between the pair of upstream conveyors 11a can be changed according to the outer diameter of the rim.
  • the rim table 13 is made of a disk-shaped plate material and is disposed above the upper end of the lower spindle 9b in a state of being retracted downward.
  • the tire test unit 3 further includes a rotation drive mechanism 18.
  • the rotation drive mechanism 18 can support the rim table 13 and rotate the rim table 13 so that the rim table 13 can rotate about an axis that is directed in the vertical direction. That is, in this embodiment, the rim table 13 is a rotary table.
  • the plurality of rims 12 having different sizes can be placed on the rim mounting surface of the rim table 13.
  • the plurality of rims 12 can be placed at each of a plurality of positions aligned in the rotational circumferential direction of the rim table 13.
  • the upper rim 12a and the lower rim 12b constituting each of the plurality of rims 12 mounted on the rim table 13 are mounted on the rim mounting surface in a state where they are stacked vertically, and the upper spindle 9a and the lower rim 12b are stacked. Each can be attached to a spindle 9b.
  • the rim table 13 can be mounted with four rims 12 having different sizes from each other at four positions aligned in the rotational circumferential direction on the rim mounting surface.
  • the rim table 13 is arranged so that the rotation center axis of the rim table 13 is located on the carry-out side (exit side) of the spindle unit 9 in the transport direction.
  • the tire test section 3 has an automatic rim change function.
  • the automatic rim change function has a size that matches the size of the loaded tire T even if tires T of various sizes having different inner peripheral diameters and different tread surface widths are loaded into the tire test section 3.
  • the rim 12 is automatically replaced, and the tire test of the tire T can be continued without stagnation.
  • the automatic rim change function automatically changes the rim 12 attached to the spindle unit 9 based on information such as the size of the next tire T carried in from the upstream lubrication unit 2.
  • the rim 12 By changing to the rim 12 corresponding to the size of the tire T, etc., it is a function that makes it possible to cope with tire tests of tires T of various sizes.
  • a rim exchanging mechanism 50 (specifically, a rim detaching mechanism) having an unconventional configuration for exchanging the upper rim 12a in the spindle unit 9, specifically, the upper spindle 9a. 51). Details will be described below.
  • the tire testing machine 1 includes a frame 52 and a housing 53.
  • a part of the frame 52 is arranged above the upstream conveyor 11a that conveys the tire T to be tested in a horizontal posture.
  • a part of the frame 52 is provided above the upstream conveyor 11a so as to straddle the upstream conveyor 11a.
  • the frame 52 includes an upper frame 52a that rotatably supports the upper spindle 9a, and a lower frame 52b that supports the upper frame 52a.
  • a lower spindle 9b is provided below the upper spindle 9a.
  • the housing 53 is provided on the lower frame 52b and rotatably supports the lower spindle 9b.
  • the upper spindle 9a has an engaging portion.
  • the engaging portion is provided on the lower end surface of the upper spindle 9a and has a concave portion that is recessed upward from the lower end surface.
  • the upper spindle 9 a has a spindle body and a flange portion 55.
  • the spindle body is a cylindrical portion extending in the vertical direction around the rotation center axis of the upper spindle 9a, and the flange portion 55 is a portion that extends in an annular shape radially outward from the outer peripheral surface of the spindle body. .
  • the flange portion 55 is provided at the lower end portion of the spindle body.
  • the flange portion 55 has a shape projecting radially outward from the outer peripheral surface of the lower end portion of the spindle body.
  • a portion of the upper spindle 9a below the flange portion 55 is a portion where the engaging portion is provided.
  • the upper spindle 9a has a lower surface 9S, and the upper rim 12a has an upper surface 12S.
  • the upper surface 12S of the upper rim 12a is a surface that contacts the lower surface 9S of the upper spindle 9a in a state where the upper rim 12a is mounted on the upper spindle 9a.
  • the lower surface 9S of the upper spindle 9a is a surface facing the upper surface 12S of the upper rim 12a in the vertical direction.
  • the lower surface 9S of the upper spindle 9a is constituted by the lower surface of the flange portion 55.
  • the lower surface 9S is configured by an annular surface centered on the rotation center axis of the upper spindle 9a in the bottom view.
  • the annular surface is a surface configured by a region surrounded by two concentric circles having different diameters around the rotation center axis in the bottom view.
  • the lower surface 9S of the flange portion 55 of the upper spindle 9a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper spindle 9a.
  • the lower surface 9S is not limited to a flat surface, and may include a curved surface.
  • the lower surface 9S may be a surface formed in a portion other than the flange portion 55 of the upper spindle 9a.
  • the lower surface 9S of the upper spindle 9a does not have to be a lowermost surface among the surfaces of the upper spindle 9a.
  • the lower surface 9S of the upper spindle 9a may be a surface that faces downward and faces the upper surface 12S of the upper rim 12a in the vertical direction.
  • the upper surface 12S of the upper rim 12a is configured by an annular surface centering on the rotation center axis of the upper rim 12a in plan view.
  • the annular surface is a surface constituted by a region surrounded by two concentric circles having different diameters around the rotation center axis of the upper rim 12a in plan view.
  • the upper surface 12S of the upper rim 12a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper rim 12a.
  • the upper surface 12S is not limited to a flat surface, and may include a curved surface.
  • the upper surface 12S of the upper rim 12a may not be the uppermost surface of the surface of the upper rim 12a.
  • the upper surface 12S of the upper rim 12a may be a surface that faces upward and faces the lower surface 9S of the upper spindle 9a in the vertical direction.
  • the upper surface 12S of the upper rim 12a is a surface that faces the pressing surface 62S of the pressing member 62, which will be described later, in the vertical direction, and receives a downward pressing force by the pressing surface 62S.
  • the upper surface 12S is a surface that contacts the lower surface 9S of the upper spindle 9a when the upper rim 12a is mounted on the upper spindle 9a.
  • the portion of the upper surface 12S of the upper rim 12a that is in contact with the pressing surface 62S and the portion of the upper rim 12a that is in contact with the lower surface 9S have the same height, but the present invention is not limited to this. There may be.
  • the flange portion 55 has at least one mounting portion 71.
  • the flange portion 55 has a plurality of mounting portions 71.
  • Each mounting portion 71 is constituted by a concave portion that is recessed upward from the lower surface 9S of the flange portion 55.
  • the plurality of mounting portions 71 are arranged on the lower surface 9S at intervals in the circumferential direction.
  • the upper spindle 9a has a plurality of permanent magnets 56.
  • the plurality of permanent magnets 56 are arranged at intervals in the circumferential direction around the rotation center axis of the upper spindle 9a.
  • the plurality of permanent magnets 56 have a function of fixing (magnetizing) the upper rim 12a to the upper spindle 9a by these magnetic forces.
  • the upper rim 12 a is formed of a material attached to the permanent magnet 56.
  • the plurality of permanent magnets 56 are accommodated in the plurality of mounting portions 71 formed on the lower surface 9S of the flange portion 55 of the upper spindle 9a. These permanent magnets 56 are accommodated in a plurality of mounting portions 71 that respectively open downward and have ceiling surfaces.
  • the plurality of permanent magnets 56 generate a strong magnetic force below the lower surface 9S of the flange portion 55 of the upper spindle 9a. This enables the upper rim 12a to be magnetically attached to the upper spindle 9a, specifically, to be magnetically attached to the lower surface 9S of the flange portion 55 of the upper spindle 9a.
  • the lower spindle 9 b is rotatably attached to the housing 53.
  • the tire testing machine 1 further includes a lifting cylinder 72.
  • the lifting cylinder 72 is provided so as to extend downward from the housing 53.
  • the elevating cylinder 72 can elevate and lower the lower spindle 9b in the vertical direction.
  • the upper end of the lower spindle 9b is formed in a tapered shape that becomes thinner as it goes upward.
  • the upper end portion of the lower spindle 9b can be engaged with the engaging portion of the upper spindle 9a.
  • the lower spindle 9b has a flange portion similar to the upper spindle 9a on the lower side of the tapered portion.
  • a plurality of unillustrated permanent magnets are mounted on the upper surface of the flange portion.
  • the lower rim 12b is fixed to the lower spindle 9b by the magnetic force of the permanent magnet of the lower spindle 9b.
  • the upper rim 12a is disposed in a stacked state on the lower rim 12b.
  • the lower spindle 9b is extended upward using the lifting cylinder 72 (the lower spindle 9b is displaced upward), and the upper rim 12a is generated by the magnetic force of the upper permanent magnet 56 provided on the flange portion 55 of the upper spindle 9a. Is fixed to the upper spindle 9a.
  • the lower rim 12b is detached from the lower spindle 9b, the lower rim 12b is placed on the upper surface of the rim table 13 by the lower spindle 9b being displaced downward using the elevating cylinder 72.
  • the rim table 13 restricts the lower rim 12b mounted thereon from moving downward. Accordingly, when the lower spindle 9b moves further downward, the lower rim 12b is removed from the lower spindle 9b and placed on the rim table 13.
  • the upper spindle 9a is fixed to the frame 52 so as not to move up and down. For this reason, the method (detachment method) of removing the upper rim 12a from the upper spindle 9a is different from the above-described disconnection method related to the lower rim 12b.
  • the rim replacement mechanism 50 includes a rim detachment mechanism 51 that forcibly separates the upper rim 12a fixed to the upper spindle 9a by the permanent magnet 56 from the upper spindle 9a.
  • the rim detachment mechanism 51 has a configuration for pressing downward a portion of the upper surface 12S of the upper rim 12a that is spaced radially outward from the upper spindle 9a.
  • the rim separation mechanism 51 will be specifically described.
  • the rim removal mechanism 51 in the rim replacement mechanism 50 is configured such that the plurality of permanent magnets 56 in the upper spindle 9a pulls the upper rim 12a toward the upper spindle 9a and the weight of the upper rim 12a.
  • the upper surface 12S of the upper rim 12a is pressed downward with a force larger than the value obtained by subtracting.
  • the rim replacement mechanism 50 (rim removal mechanism 51) includes at least one pressing member 62 and at least one air cylinder 61 (actuator). Specifically, the rim replacement mechanism 50 according to the present embodiment has one pressing member 62 and a plurality of air cylinders 61. 5-7, only one pressing member 62 and one air cylinder 61 are shown. The plurality of air cylinders 61 are arranged around the upper spindle 9a at intervals in the circumferential direction. The pressing member 62 is disposed below the plurality of air cylinders 61.
  • the pressing member 62 includes a main body portion 62A and an elastic portion 63.
  • the main body 62A has at least one pressing surface 62S for applying a downward pressing force to the upper surface 12S of the upper rim 12a.
  • the elastic portion 63 is provided to apply a vertical force to the main body portion 62A by its elastic force.
  • the elastic portion 63 includes at least one first spring body 63a and at least one second spring body 63b.
  • the first spring body 63a is disposed below the intermediate member 68 described later, and is mainly provided to apply a downward pressing force (elastic force) to the main body portion 62A.
  • the second spring body 63b is disposed on the upper side of the intermediate member 68, and is mainly provided to support the body portion 62A by applying an upward pressing force (elastic force) to the body portion 62A. It has been.
  • Each air cylinder 61 is for displacing the main body 62A of the pressing member 62 in the vertical direction within a range including an upper position and a lower position.
  • the upper position is a position where the pressing surface 62S of the main body 62A is located above the upper surface 12S of the upper rim 12a mounted on the upper spindle 9a.
  • the lower position is a position below the upper position. In the lower position, the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a. Accordingly, as shown in FIG.
  • the upper surface 12S of the upper rim 12a is a position that allows the lower surface 9S of the upper spindle 9a to be separated downward.
  • the upper position is a position where the pressing surface 62S is disposed above the lower surface 9S of the upper spindle 9a
  • the lower position is the position where the pressing surface 62S is the upper spindle 9a. It is a position arranged below the lower surface 9S.
  • the main body 62A is configured to be vertically displaceable between the main body lower limit position and the main body upper limit position.
  • the lower limit position of the main body portion is the lowest position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially lower stroke end in the air cylinder 61. is there.
  • the upper limit position of the main body portion is the uppermost position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially upper stroke end in the air cylinder 61. .
  • the lower position of the main body portion 62A may not be the main body portion lower limit position, but may be a position above the main body portion lower limit position. Further, the upper position of the main body portion 62A may not be the main body portion upper limit position, and may be a position below the main body portion upper limit position.
  • the air cylinder 61 as the actuator operates to displace the main body 62A between the main body lower limit position and the main body upper limit position.
  • FIG. 5 shows a state where the main body 62A is in the standby position.
  • the standby position is the position of the main body portion 62A when the elastic force by the elastic portion 63 and the weight of the main body portion 62A are balanced.
  • the pressing surface 62S of the main body 62A is disposed below the lower surface 9S of the upper spindle 9a.
  • the standby position may be the same as the lower position, may be a position between the lower position and the main body lower limit position, or may be the same position as the main body lower limit position.
  • the first spring body 63a When the main body 62A is disposed at the lower position, the first spring body 63a applies a downward pressing force to the main body 62A by its elastic force. When the standby position is further below the lower position, the first spring body 63a faces downward with respect to the main body 62A when the main body 62A is disposed at the standby position. However, it is not always necessary to apply a downward pressing force to the main body portion 62A. That is, when the main body 62A is disposed at a position further lower than the lower position, the first spring body 63a may be in a fully extended state.
  • Each air cylinder 61 has a cylinder body 61A, a piston 74, and a cylinder rod 75.
  • the cylinder body 61 ⁇ / b> A is a member having a cylindrical shape (specifically, a cylindrical shape) that partitions the cylinder chamber 73.
  • the piston 74 is accommodated in the cylinder chamber 73 and defines the cylinder chamber 73 into an upper chamber 73U and a lower chamber 73D.
  • the piston 74 is configured to be movable up and down in the cylinder chamber 73.
  • the main body 62A of the pressing member 62 is configured to be displaced in the vertical direction as the piston 74 moves up and down in the vertical direction.
  • the cylinder body 61A of each air cylinder 61 is attached to the frame 52 via a bracket.
  • the air cylinder 61 can generate a pressing force downward.
  • the number of installed air cylinders 61 is appropriately set according to the number of installed permanent magnets 56 and the strength of the magnetic force.
  • the rim replacement mechanism 50 includes two air cylinders 61.
  • the plurality of air cylinders 61 are preferably arranged at equal intervals in the circumferential direction. All the air cylinders 61 are configured to operate in synchronization with each other.
  • Compressed air generated in a compressor (not shown) is supplied to the cylinder chamber 73 of the air cylinder 61.
  • the cylinder rod 75 is connected to the lower end of the piston 74 and is configured to be movable in the vertical direction as the piston 74 moves up and down.
  • the cylinder rod 75 is constituted by a rod-shaped member extending downward from the piston 74.
  • the main body 62 ⁇ / b> A of the pressing member 62 is connected to the lower end of the cylinder rod 75.
  • the rim replacement mechanism 50 further includes a switching valve 78, a controller 80, and a plurality of sensors.
  • the cylinder body 61A of the air cylinder 61 has an upper port 76 that communicates with the upper chamber 73U of the cylinder chamber 73, and a lower port 77 that communicates with the lower chamber 73D.
  • Each of the upper port 76 and the lower port 77 can be supplied with compressed air from a compressor (not shown).
  • the compressor and each of the two ports 76 and 77 are connected by two pipes.
  • the switching valve 78 is interposed between the compressor and the air cylinder 61, and can switch the supply state of compressed air to the two ports 76 and 77.
  • the switching valve 78 is constituted by an electromagnetic switching valve or the like.
  • the switching valve 78 is a valve capable of selectively switching the flow path.
  • the switching valve 78 changes the supply state of the compressed air to “the state where the compressed air is supplied to the upper port 76 and the lower port 77 is opened”, “the compressed air is supplied to the lower port 77 and the upper side is opened. It is possible to switch between “a state in which the port 76 is opened” and “a state in which both the upper and lower ports 76 and 77 are opened”.
  • the plurality of sensors include a first sensor (not shown) that can detect that the upper rim 12a is mounted on the upper spindle 9a, and a first sensor (not shown) that can detect the position of the piston 74 of the air cylinder 61. 2 sensors. Signals output from these sensors are input to the controller 80.
  • the controller 80 is constituted by a computer or the like.
  • the controller 80 has a switching valve control unit 81, a mounting state determination unit 82, and a piston position determination unit 83 as functions.
  • the switching valve control unit 81 controls the operation of the switching valve 78.
  • the mounting state determination unit 83 determines whether or not the upper rim 12a is mounted on the upper spindle 9a based on a signal input from the first sensor.
  • the piston position determination unit 83 determines whether the piston 74 of the air cylinder 61 has reached the upper limit position based on a signal input from the second sensor.
  • the switching valve 78 is configured as an electromagnetic switching valve that switches between a first allowable state, a second allowable state, and a blocking state based on a command signal output from the controller 80, for example.
  • the first permissible state allows compressed air from the compressor to be supplied to the lower chamber 73D of the air cylinder 61 and allows air to be discharged from the upper chamber 73U.
  • the second allowable state allows compressed air from the compressor to be supplied to the upper chamber 73U and allows air to be discharged from the lower chamber 73D.
  • the blocking state allows air to be discharged from the upper chamber 73U and the lower chamber 73D, and prevents the compressed air from the compressor from being supplied to the upper chamber 73U and the lower chamber 73D. .
  • the pressing member 62 is provided below the air cylinder 61.
  • the elastic portion 63 of the pressing member 62 includes a plurality of first spring bodies 63a and a plurality of second spring bodies 63b.
  • Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b is a compression spring (coil spring), but is not limited to a compression spring and may be other types of springs.
  • the main body 62A of the pressing member 62 includes at least one connector member 65 (an example of an upper member), at least one rod body 64, and at least one lower structure.
  • the main body 62A has a plurality of connector members 65, a plurality of rods 64, and one lower structure (an example of a lower member), and the lower structure has at least one lower structure.
  • One ring body 67 and at least one pressing piece 70 are included.
  • the lower structure includes one ring body 67 and a plurality of pressing pieces 70.
  • the first spring body 63a exerts a downward pressing force on the lower structure of the main body 62A when the main body 62A is disposed at the lower position. More specifically, it is configured to apply a downward pressing force to the ring body 67 of the lower structure.
  • the plurality of connector members 65 are disposed at positions corresponding to the plurality of air cylinders 61, respectively. Each of the plurality of connector members 65 is connected to the lower end portion of the cylinder rod 75 of the corresponding air cylinder 61. Specifically, the lower end portion of the cylinder rod 75 is connected to the connector member 65 so as to be relatively movable with play in the vertical direction.
  • each connector member 65 and the lower structure Between each connector member 65 and the lower structure, at least one of the plurality of rods 64 is interposed.
  • Each of the plurality of rod bodies 64 is a rod-like member extending downward from the corresponding connector member 65.
  • Each of the plurality of rod bodies 64 extends in the vertical direction between the corresponding connector member 65 and the ring body 67 of the lower structure to connect them.
  • Each rod 64 passes through the corresponding first spring body 63a and second spring body 63b, and supports the first spring body 63a and the second spring body 63b.
  • each rod body 64 is disposed so as to vertically penetrate the center portion of the first spring body 63a and the second spring body 63b arranged vertically via an intermediate member 68 described later. .
  • Each rod body 64 is set to a length slightly shorter than the vertical length of the first spring body 63a and the second spring body 63b in a state where an external force is not applied (free length state). .
  • the pressing member 62 transmits the pressing force generated by the air cylinder 61 to the upper surface 12S of the upper rim 12a and presses the upper rim 12a downward.
  • the ring body 67 of the lower structure is connected to lower ends of the plurality of rod bodies 64.
  • the plurality of pressing pieces 70 respectively extend downward from the lower surface of the ring body 67.
  • the lower structure of the main body portion 62 ⁇ / b> A has a plurality of pressing surfaces 62 ⁇ / b> S, and the plurality of pressing surfaces 62 ⁇ / b> S are respectively configured by the lower surfaces of the plurality of pressing pieces 70. Note that the position and number of the plurality of pressing pieces 70 may not correspond to the position and number of the plurality of air cylinders 61.
  • the rim replacement mechanism 50 further includes an intermediate member 68 (an example of a support member in the present invention) disposed between the connector member 65 and the lower structure.
  • the relative position of the intermediate member 68 with respect to the cylinder body 61A is constant, and the relative position with respect to the upper spindle 9a is constant.
  • the attachment position of the intermediate member 68 and the cylinder body 61A is not particularly limited as long as the relative position can be fixed.
  • the intermediate member 68 and the cylinder main body 61A may be supported by the frame 52 via, for example, a bracket (not shown). Moreover, these may be supported by the part which does not rotate among the members which comprise the upper spindle 9a (for example, trunk
  • the connector member 65 has a flange portion 66.
  • the flange portion 66 has a shape protruding in the horizontal direction (for example, the front-rear direction).
  • the upper end of the rod body 64 is connected to the lower surface of each flange portion 66.
  • the first spring body 63a and the second spring body 63b are arranged so as to surround the rod body 64.
  • Each bar 64 serves as a push bar, which is one of the functions of the pressing member 62.
  • the lower end of each rod body 64 is connected to the upper surface of the ring body 67.
  • each of the spring bodies constituting the elastic portion 63 is a compression spring.
  • the plurality of first spring bodies 63 a are interposed between the ring body 67 and the intermediate member 68.
  • the plurality of second spring bodies 63b are interposed between the intermediate member 68 and the corresponding connector member 65.
  • Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b has a shape that is long in the vertical direction and is configured to expand and contract in the vertical direction.
  • the intermediate member 68 supports one end (upper end) of each of the plurality of first spring bodies 63a, and the ring body 67 is the other of the plurality of first spring bodies 63a. Supports the end (lower end).
  • each of the plurality of first spring bodies 63 a is restricted from moving upward by the intermediate member 68, and is restricted from moving downward by the ring body 67.
  • Each of the plurality of first spring bodies 63a contracts as the main body 62A moves upward relative to the intermediate member 68, and the main body 62A moves downward relative to the intermediate member 68. Stretches with relative movement.
  • the intermediate member 68 supports one end (lower end) of each of the plurality of second spring bodies 63b, and each of the plurality of connector members 65 includes one of the plurality of second spring bodies 63b. The other end (upper end) of the corresponding second spring body 63b is supported. Thereby, each of the plurality of second spring bodies 63b is restricted from moving downward by the intermediate member 68 and is restricted from moving upward by the connector member 65.
  • Each of the plurality of second spring bodies 63 b expands as the main body portion 62 ⁇ / b> A moves upward relative to the intermediate member 68, and the main body portion 62 ⁇ / b> A moves downward relative to the intermediate member 68. It contracts with relative movement.
  • the intermediate member 68 has a plurality of insertion holes that penetrate the intermediate member 68 in the vertical direction.
  • the plurality of rod bodies 64 are inserted through the plurality of insertion holes, respectively.
  • a sliding bush 68a is disposed in each of the plurality of insertion holes of the intermediate member 68.
  • the sliding bush 68 a guides the rod body 64 while reducing the resistance between the rod body 64 and the intermediate member 68.
  • This sliding bush 68a has a cylindrical shape having a through-hole penetrating the sliding bush 68a in the vertical direction.
  • the corresponding rod body 64 is slidably inserted into the through hole of the sliding bush 68a. That is, the sliding bush 68a is interposed between the inner peripheral surface of each of the plurality of insertion holes of the intermediate member 68 and the rod body 64 inserted through the insertion hole.
  • the intermediate member 68 supports the plurality of rod bodies 64 via the plurality of sliding bushes 68a. For this reason, each of the plurality of rod bodies 64 is displaced only in one direction (only in the vertical direction), and is prevented from being displaced in a direction other than the vertical direction, for example, in the horizontal direction (horizontal direction). Therefore, in each of the plurality of rod bodies 64, problems such as shaft runout of the rod body 64 are suppressed. That is, the sliding bush 68a restricts the operation of the rod body 64 so that the rod body 64 only moves in the vertical direction. As a result, it is possible to prevent the ring body 67 from being inclined and the pressing surface 62S, which is the lower surface of the pressing piece 70, from pressing the upper surface 12S of the upper rim 12a unevenly.
  • the sliding bush 68a has the main body 62A of the pressing member 62 stably in the vertical direction.
  • the intermediate member 68 and the plurality of sliding bushes 68a restrict the operating directions of the plurality of rod bodies 64 in the vertical direction. Since the plurality of rod bodies 64 are a part of the main body portion 62A of the pressing member 62, when the main body portion 62A operates in the vertical direction, the main body portion 62A operates in a direction inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed.
  • the sliding bush 68a is not provided, the posture of the main body 62A (specifically, the ring body 67 and the pressing piece 70) may be inclined.
  • the sliding bush 68a is provided in each of the plurality of insertion holes of the intermediate member 68, so that the operation direction of the main body 62A connected to the plurality of air cylinders 61 is inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed.
  • the reason why the first spring body 63a and the second spring body 63b are arranged separately on the upper and lower sides with the intermediate member 68 whose relative position to the cylinder body 61A is fixed as described above is as follows. This is to increase the degree of design freedom when setting an appropriate stroke and spring force of the elastic part 63 according to the weight of the elastic member 63. Specifically, it is as follows. If the first spring body 63a and the second spring body 63b are designed as an integral spring, the condition required for the elastic portion 63 is difficult to be satisfied by a general commercial product. It is necessary to prepare, and the cost increases.
  • the degree of freedom in design of the elastic portion 63 Will increase. This makes it possible to expand the options for selecting the first spring body 63a and the second spring body 63b, thereby reducing the cost. Note that the stroke and spring force of the spring constituting the elastic portion 63 must satisfy the following conditions, and it is difficult for general commercial products to meet these conditions.
  • the spring force (elastic force of the entire elastic portion 63) in the process of mounting the upper rim 12a on the upper spindle 9a is the point when the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the pressing member 62 (a). Until the point (b) when the upper surface 12S of the upper rim 12a contacts the lower surface 9S of the flange portion 55. Specifically, at the time point (a), the spring force works upward to support the main body 62A, but turns downward between the time point (a) and the time point (b). In the time point (b), it works downward.
  • the downward pressing force (the spring force of the elastic portion 63) applied by the first spring body 63a to the main body portion 62A is the permanent magnet.
  • 56 is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a from the magnetic force of 56.
  • the pressing surface 62S positioned at the lower end of the pressing member 62 faces the upper surface 12S of the upper rim 12a in the vertical direction.
  • the pressing surface 62S can apply a pressing force to the upper surface 12S of the upper rim 12a fixed (held) to the upper spindle 9a.
  • the position where the pressing surface 62S presses the upper surface 12S of the upper rim 12a is a position outside the radial direction of the upper spindle 9a with respect to the position where the permanent magnet 56 is attached in the flange portion 55.
  • the position where the pressing surface 62S presses the upper surface 12S is a position farther outward in the radial direction than the outer peripheral surface of the flange portion 55 in plan view.
  • the pressing surface 62S of the pressing member 62 is a lower end surface of the pressing piece 70 that is connected to a ring body 67 provided so as to surround the upper spindle 9a and extends downward.
  • the upper spindle 9 a is loosely fitted in the through hole 69 drilled in the center of the ring body 67.
  • a plurality of pressing pieces 70 are provided so as to extend downward from the lower surface of the ring body 67.
  • a pair of pressing pieces 70 are provided.
  • Each pressing piece 70 has an arc shape along the outer periphery of the upper spindle 9a in plan view.
  • FIG. 6 shows a state of the rim replacement mechanism 50 when the tire test is being performed.
  • the switching valve 78 is switched to the first allowable state.
  • the compressed air from the compressor is allowed to be supplied to the lower chamber 73D communicating with the lower port 77, and the air in the upper chamber 73U is discharged through the upper port 76. Allow that. That is, the compressed air compressed by the compressor is supplied only to the lower chamber 73D of the cylinder chamber 73 defined by the piston 74, and the piston 74 moves upward.
  • the piston 74 and the cylinder rod 75 of the air cylinder 61 move upward, and the main body 62A (the pressing piece 70, the ring body 67, the rod body 64, and the connector member 65) of the pressing member 62 also move upward.
  • the main body 62A of the pressing member 62 is in the upper position, and the lower end surface of the pressing piece 70, that is, the pressing surface 62S of the pressing member 62 is above the lower surface 9S of the upper spindle 9a and the lower surface of the permanent magnet 56. And is spaced upward from the upper surface 12S of the upper rim 12a.
  • the upper rim 12a is mounted on the upper spindle 9a and fixed to the upper spindle 9a by the magnetic force of the permanent magnet 56.
  • the lower rim 12b is attached to the lower spindle 9b and is fixed to the lower spindle 9b by the magnetic force of the permanent magnet.
  • the upper and lower rims 12 a and 12 b are arranged at intervals in the vertical direction.
  • FIG. 7 shows a state when the upper rim 12a is removed from the upper spindle 9a.
  • the operation of the switching valve 78 is controlled so as to switch to
  • the compressed air from the compressor is allowed to be supplied to the upper chamber 73U that communicates with the upper port 76 and the air from the lower chamber 73D that communicates with the lower port 77. Is allowed to be discharged.
  • the compressed air compressed by the compressor is supplied only to the upper chamber 73U of the cylinder chamber 73 partitioned by the piston 74, and the piston 74 and the cylinder rod 75 move downward.
  • the downward pressing force by the air cylinder 61 at this time exceeds the value obtained by subtracting the weight of the upper rim 12a from the force with which the permanent magnet 56 pulls the upper rim 12a toward the upper spindle 9a.
  • the downward pressing force is transmitted to the upper surface 12S of the upper rim 12a through the connector member 65, the rod body 64, the ring body 67, and the pressing piece 70.
  • the pressing force strongly presses the upper rim 12a downward. Therefore, the main body 62A of the pressing member 62 moves further downward from the position shown in FIG. 7 and reaches the lower position.
  • the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a.
  • the upper surface 12S of the upper rim 12a can be separated downward from the lower surface 9S of the upper spindle 9a. Therefore, when the main body 62A reaches the lower position, the upper surface 12S of the upper rim 12a is disposed at a position spaced downward from the lower surface 9S of the upper spindle 9a.
  • the piston 74 and the cylinder rod 75 are further moved downward by the downward pressing force generated by the compressed air.
  • the main body 62A reaches the lower limit position of the main body.
  • the upper rim 12a is reliably and quickly detached from the upper spindle 9a.
  • the upper rim 12a detached from the upper spindle 9a in this way is lowered together with the lower spindle 9b while being arranged on the lower rim 12b. Thereby, the upper rim 12a is removed from the upper spindle 9a.
  • the lower spindle 9b is further lowered and the lower rim 12b reaches the upper surface of the rim table 13, the lower rim 12b is detached from the lower spindle 9b, and the lower rim 12b and the The upper rim 12a overlapping the upper side is arranged.
  • FIG. 5 shows a state when the upper rim 12a is mounted on the upper spindle 9a.
  • the switching valve control unit 81 of the controller 80 blocks the switching valve 78 in a state where the upper rim 12a is detached from the upper spindle 9a. Control to switch to the state. Accordingly, the main body 62A is disposed at the standby position.
  • the switching valve 78 When the switching valve 78 is switched to the blocking state, the switching valve 78 is in a state where both the upper and lower ports 76 and 77 are opened as shown in FIG.
  • the first spring body 63a pushes downward when the main body 62A is disposed at the standby position.
  • the pressure does not necessarily have to act on the main body 62A, and the downward pressing force by the first spring body 63a when the main body 62A is arranged at the lower position above the standby position. May act on the main body 62A.
  • the pressing force (elastic force) of the first spring body 63a makes it possible to relieve an impact when the upper rim 12a is newly attached to the upper spindle 9a.
  • the state of the rim replacement mechanism 50 shown in FIG. 5 is a standby state for waiting for the upper rim 12a to be mounted on the upper spindle 9a.
  • the main body portion 62A In the standby state, the main body portion 62A is disposed at the standby position, and the lower end surface of the pressing piece 70 (that is, the lower surface 62S of the main body portion 62A of the pressing member 62) protrudes below the lower surface 9S of the flange portion 55. Yes.
  • the spring constant of the elastic portion 63 is set so that the lower surface 62S of the main body 62A is positioned below the lower surface 9S of the upper spindle 9a.
  • the spring constants of the spring bodies 63a and 63b and the lengths of the spring bodies 63a and 63b are set in consideration of, for example, the conditions 1 to 3 described above.
  • the elastic portion 63 includes the first spring body 63 a disposed below the intermediate member 68 and the second spring body 63 b disposed above the intermediate member 68. including.
  • the direction in which the spring force acts by the elastic portion 63 acts in two vertical directions. Is possible.
  • the spring force of the elastic portion 63 can be adjusted by adjusting the length of each spring body, a degree of freedom in design is ensured.
  • the lower spindle 9b with the upper rim 12a and the lower rim 12b placed on the upper end rises, and the upper surface 12S of the upper rim 12a
  • the magnetic force of the permanent magnet 56 acts on the upper rim 12a, and the upper rim 12a is drawn upward toward the upper spindle 9a. It is done.
  • the lower end surface 62S of the pressing piece 70 that is, the lower surface 62S of the main body portion 62A of the pressing member 62 is positioned below the lower surface 9S of the flange portion 55, so that it is attracted to the upper spindle 9a by magnetic force.
  • the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the main body portion 62A of the pressing member 62 prior to the lower surface 9S of the flange portion 55.
  • the main body 62A in the standby position at the time of contact rises as the upper rim 12a rises so as to approach the lower surface 9S of the upper spindle 9a by the magnetic force.
  • the pressing force of the first spring body 63a acts downward on the main body portion 62A, the impact when the upper surface 12S of the upper rim 12a comes into contact with the lower surface 9S of the upper spindle 9a is reduced.
  • the spring body 63a is relaxed by contraction. As a result, it is possible to suppress the formation of scratches on the upper surface 12S and the lower surface 9S, which are magnetized surfaces (contact surfaces), and the generation of a large impact sound.
  • the rim replacement mechanism 50 is switched again to the state shown in FIG. In such a state, the piston 74 moves upward, and the pressing piece 70 moves away from the upper surface 12S of the upper rim 12a.
  • the state shown in FIG. 6 is a state where a tire test is possible. The procedure for removing the upper rim 12a by the rim replacement mechanism 50 from the state shown in FIG. 6 is as described above.
  • the air cylinder 61 and the bracket that supports the air cylinder 61 are fixed to the upper frame 52a so as not to rotate integrally with the upper spindle 9a. That is, the rim replacement mechanism 50 has a structure that does not rotate with the rotation of the upper spindle 9a. Therefore, in the tire test, an error component due to the rotation of the rim replacement mechanism 50 is suppressed from being added to the uniformity measurement system. As a result, the uniformity can be measured with high accuracy.
  • the rim exchanging mechanism 50 (rim removing mechanism 51) according to the present embodiment can suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
  • the length of the rod body 64, the lengths of the spring bodies 63a and 63b, and the position of the intermediate member 68 are adjusted so that a downward pressing force is applied to the main body portion 62A of the pressing member 62. ing.
  • the elastic portion 63 relaxes the impact force when the upper rim 12a is mounted on the upper spindle 9a, and scratches and impact sounds on the upper surface 12S of the upper rim 12a and the lower surface 9S of the upper spindle 9a are alleviated.
  • an air circuit is configured in which both ports 76 and 77 of the air cylinder 61 are opened. That is, in the standby state, the cylinder rod 75 of the air cylinder 61 can freely expand and contract.
  • the controller 80 to which the signal is input causes the switching valve so that the piston 74 of the air cylinder 61 is raised. The operation of 78 is controlled.
  • the controller 80 to which the signal is input controls the operation of the elevating cylinder 72 so that the lower spindle 9b is lowered. To do. Thereby, the upper rim 12a and the lower rim 12b are quickly fixed to the upper spindle 9a and the lower spindle 9b, respectively.
  • the pressing surface 62S of the pressing member 62 that presses the upper surface 12S of the upper rim 12a is included in any of the upper rims 12a used in the tire test included in the range from the upper rim 12a having the smallest diameter to the upper rim 12a having the largest diameter. Even the upper rim 12a having the size is arranged at a position where it can be pressed.
  • a pressing piece 70 rim 12 pressing member extending downward from the lower surface is provided on the lower surface of the ring body 67.
  • the pressing surface 62S appropriately presses the upper surface 12S of the upper rim 12a.
  • the pressing surface 62S can appropriately press the upper surface 12S of the upper rim 12a.
  • the elastic portion 63 is divided into an upper second spring body 63 b and a lower first spring body 63 a through an intermediate member 68.
  • the connector member 65 is provided with a play that allows the lower end portion of the cylinder rod 75 to move relative to the connector member 65 in the vertical direction. This play is provided in order to make the movement amount of the pressing member 62 smaller (shorter) than the stroke of the cylinder rod 75 of the air cylinder 61.
  • the plurality of rims 12 having different sizes are placed on the rim mounting surface of the rim table 13. That is, in this embodiment, any one of the plurality of upper rims 12a having different sizes and weights can be mounted on the upper spindle 9a.
  • the downward pressing force applied to the main body 62A by the first spring body 63a in a state where the upper rim 12a is mounted on the upper spindle 9a It is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a having the maximum weight among the plurality of upper rims 12a that can be mounted on the spindle 9a.
  • the rim replacement mechanism 50 in the tire testing machine 1 has the rim separation mechanism 51, and the pressing member 62 of the rim separation mechanism 51 includes the elastic portion 63. It is possible to suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
  • the tire testing machine employs a hydraulic cylinder (hydraulic jack) as a rim detaching mechanism to reduce the impact of the upper rim when it comes into contact with the upper spindle.
  • a possible countermeasure is to use it. That is, the tire testing machine according to the countermeasure includes a rim detaching mechanism for removing the upper rim from the upper spindle, and the rim detaching mechanism is provided in a suspended state on the upper frame, and generates hydraulic pressure downward.
  • a cylinder and a pressing member having a lower end that presses the upper rim using the pressing force of the hydraulic cylinder. That is, in the tire testing machine, the hydraulic cylinder of the rim separation mechanism is also used as a means for reducing the impact when the upper rim is magnetically attached.
  • the upper rim when replacing the upper rim, the upper rim is removed, and the hydraulic cylinder is extended downward until another upper rim is mounted on the upper spindle, and the pressing member is pushed downward (rim pressing operation).
  • the upper rim is magnetically attached to the upper spindle in this state, the upper rim is lifted by utilizing the cushion effect when the hydraulic cylinder is pushed back due to the difference between the downward pressing force of the hydraulic cylinder and the lifting force of the lower spindle.
  • the impact force when the rim is installed is reduced.
  • the sensor detects that the upper rim has been securely mounted, the pressure of the hydraulic jack is released, and the lower spindle moves down to complete the rim replacement operation. .
  • this countermeasure may have the following problems.
  • the above-described operation of the hydraulic cylinder operation for solving the problem when the upper rim is magnetized
  • the rim replacement operation may be performed manually.
  • the lower spindle on which the upper and lower rims are mounted is raised without the rim pushing operation being performed. Operation may be performed. In this case, the impact when the upper rim is mounted on the upper spindle is not relieved.
  • a sensor may be provided for detecting that the upper rim is mounted on the upper spindle.
  • the sensor does not detect the upper rim, the operation of removing the upper rim from the upper spindle is not performed.
  • the sensor for detecting the upper rim malfunctions for some reason, and it is determined that the upper rim is not mounted even though the upper rim is mounted on the upper spindle.
  • the hydraulic cylinder is used to achieve the two functions of detachment of the upper rim and shock buffering when the upper rim is mounted, the above-described various problems caused by this combined operation are completely eliminated. It is not solved.
  • the first spring body 63a and the second spring body 63b are arranged via the intermediate member 68.
  • the elastic portion 63 may include a first spring body 63a but not a second spring body 63b.
  • the main body portion 62A when the main body portion 62A is disposed at the lower limit position of the main body portion, the main body portion 62A may be supported by, for example, the lower end portion of the cylinder rod 75 of the air cylinder 61, and the connector member 65.
  • the lower surface of the intermediate member 68 may be supported by contacting the upper surface of the intermediate member 68.
  • the rim replacement mechanism 50 includes a support member (intermediate member 68), but the present invention is not limited to this embodiment.
  • the support member (intermediate member 68) may be omitted, and the elastic portion 63 may be composed of only at least one first spring body 63a.
  • the lower end portion of the rod body 64 is fixed to the ring body 67 of the lower structure, while the upper end portion of the rod body 64 is a through hole provided in the upper member (connector member 65). It may be inserted. In this configuration, the rod body 64 can be moved relative to the connector member 65 in the vertical direction when the main body 62A moves up and down in the vertical direction.
  • the present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine that can alleviate the impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle.
  • the purpose is to provide.
  • the rim replacement mechanism is provided in the tire testing machine.
  • the tire testing machine includes a plurality of rims for sandwiching a tire, each of the rims having an upper rim and a lower rim, and the upper rim of any rim selected from the plurality of rims.
  • An upper spindle that can be mounted and removed, and has a lower surface in contact with the upper surface of the upper rim mounted on the upper spindle, and the upper rim mounted on the upper spindle is magnetically
  • An upper spindle having a permanent magnet for fixing to the spindle, and a lower spindle to which the lower rim is attached.
  • the rim exchange mechanism is a mechanism for exchanging the upper rim fixed to the upper spindle.
  • the rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include.
  • the upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle.
  • the lower position is a position below the upper position, and the main body portion faces the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim.
  • the upper surface of the upper rim can be moved downward from the lower surface of the upper spindle by moving downward.
  • the spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
  • the main body portion of the pressing member is disposed at the upper position by the actuator.
  • the pressing surface of the main body portion is located above the upper surface of the upper rim mounted on the upper spindle. It does not hinder the rotation of the upper rim and the upper spindle.
  • the actuator moves the body portion of the pressing member downward to It is arranged at a lower position or a position below the lower position (for example, the standby position).
  • the upper surface of the upper rim is moved upward by the main body moving to the lower position while the pressing surface of the main body applies a downward pressing force to the upper surface of the upper rim. It is possible to move downward from the lower surface of the spindle.
  • the other upper rim is mounted on the upper spindle, the other upper rim located below the upper spindle in a state where the main body portion is disposed at the standby position is attached to the upper spindle. It can be approached.
  • the upper rim approaches a distance that is sufficiently affected by the magnetic force of the permanent magnet in the upper spindle, the upper rim is attracted by the magnetic force and moves toward the upper spindle.
  • the spring body is configured to apply a downward pressing force to the main body portion disposed at the lower position. Due to the downward pressing force of the spring body, the moving speed of the main body and the upper rim upward is suppressed. This enables the impact when the upper surface of the upper rim contacts the lower surface of the upper spindle to be mitigated by the downward pressing force by the spring body.
  • the upper spindle is rotatably supported with respect to the frame of the tire testing machine, and the actuator is fixed to the frame. If the actuator is fixed to the upper spindle and rotates with the rotation of the upper spindle, an error component due to the rotation of the actuator is added to the measurement result of the tire test, so that the accuracy of the tire test is lowered.
  • the actuator since the actuator is not fixed to the upper spindle but fixed to the frame, the actuator does not rotate even if the upper spindle rotates. This can suppress an error component due to rotation of the actuator from being added to the measurement result of the tire test in the tire test. Thereby, it can suppress that the precision of a tire test falls.
  • the spring body is configured to expand and contract in the vertical direction, and the main body portion of the pressing member penetrates the spring body in the vertical direction and supports the spring body. It preferably contains a body.
  • the spring body configured to expand and contract in the vertical direction is supported by the rod body penetrating the spring body in the vertical direction, the spring body is prevented from being deformed in directions other than the vertical direction. The This suppresses variation in downward pressing force applied by the spring body to the main body.
  • the actuator includes a cylinder body that defines a cylinder chamber, and a piston that is accommodated in the cylinder chamber and divides the cylinder chamber into an upper chamber and a lower chamber, and the cylinder chamber
  • the main body may be configured to be displaced in the vertical direction as the piston moves up and down in the vertical direction. In this aspect, the vertical displacement of the main body is achieved by the air cylinder.
  • the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: The other end portion of the spring body may be supported, and the spring body may be configured to expand and contract in the vertical direction as the relative position of the main body portion in the vertical direction with respect to the support member changes.
  • one end of the spring body is supported by a support member whose relative position with the cylinder body is unchanged, and the other end of the spring body has a relative position with the cylinder body that is in the vertical direction of the piston. It is supported by the main body that changes as the robot moves up and down.
  • the spring body expands and contracts in the vertical direction as the relative position in the vertical direction of the main body with respect to the support member changes. This makes it possible to alleviate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
  • the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: An upper member that can move up and down in conjunction with the lifting and lowering operation of the piston, a lower member positioned below the upper member, and extending downward from the upper member to the lower member so as to extend downward from the upper member and the lower member A rod that connects a side member, and the support member is interposed between the upper member and the lower member, and the support member penetrates the support member in the vertical direction and the rod body.
  • the rim exchanging mechanism further includes a sliding bush arranged in the insertion hole of the support member, and the sliding bush passes through the sliding bush in the vertical direction and the rod body.
  • the rod is configured to move up and down in conjunction with the upper member while being supported by the bush.
  • the support member supports the rod body via the sliding bush.
  • the tire testing machine rim replacement mechanism allows a compressed air to be supplied to the lower chamber of the cylinder chamber and allows air to be discharged from the upper chamber of the cylinder chamber. And a second allowable state in which the compressed air is allowed to be supplied to the upper chamber and air is allowed to be discharged from the lower chamber, and air is discharged from the upper chamber and the lower chamber.
  • a switching valve capable of switching to a blocking state that permits and prevents the compressed air from being supplied to the upper chamber and the lower chamber, and a switching valve control unit that controls the operation of the switching valve.
  • the switching valve control unit When the tire test is performed, the switching valve control unit performs control to switch the switching valve to the first allowable state so that the main body portion of the pressing member is disposed at the upper position, in front When the upper rim is removed from the upper spindle, control is performed to switch the switching valve to the second permissible state so that the main body portion of the pressing member is disposed at the lower position, and the upper rim is When mounted on the upper spindle, it is preferable to perform control to switch the switching valve to the blocking state with the upper rim removed from the upper spindle.
  • the operation of the pressing member required for the tire test, the removal of the upper rim, and the mounting of the upper rim is automatically and reliably achieved by the switching valve controller of the controller.
  • the downward pressing force that the spring body applies to the main body in a state where the upper rim is mounted on the upper spindle is derived from the magnetic force of the permanent magnet.
  • the rim is set to be smaller than a value obtained by subtracting the weight of the upper rim having the maximum weight among the plurality of upper rims.
  • the tire test is performed in a state where the upper rim is mounted on the upper spindle. Therefore, the downward pressing force that the spring body applies to the main body in this mounted state is smaller than the value obtained by subtracting the weight from the magnetic force, so that the upper rim can be held by the upper spindle.
  • the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the upper spindle, and the main body portion of the pressing member includes a lower member positioned below the support member.
  • the spring body of the pressing member is disposed so as to be interposed between the support member and the lower member, and an upper end portion of the spring body is supported by the support member and a lower end portion of the spring body Is supported by the lower member, and the spring body allows the lower member to approach the support member by contracting, and the spring body has at least the main body portion and the upper position.
  • You may comprise so that downward pressing force may be applied with respect to the said lower side member of the said main-body part with the elastic force of the said spring body, when located between lower positions. This aspect makes it possible to mitigate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
  • the main body portion of the pressing member extends upward from the upper member to the lower member, and extends from the upper member to the lower member.
  • a second spring body that is supported by the upper member, and a lower end of the second spring body is supported by the support member.
  • the spring member is contracted so that the lower member becomes
  • the first spring body is allowed to approach the lower member of the main body by the elastic force of the first spring body when the first spring body is contracted.
  • the second spring body allows the upper member to approach the support member by contracting, and the second spring body is configured to apply the downward pressing force to the second spring body.
  • an upward pressing force may be applied to the upper member of the main body portion by the elastic force of the second spring body.
  • the first spring body is disposed on the lower side of the support member
  • the second spring body is disposed on the upper side of the support member. And it becomes possible to raise the freedom degree when designing the elastic part containing the said 2nd spring body.
  • the main body is positioned below the upper spindle in the state where the main body is in the lower position or the main body is further below the lower position.
  • the upper rim to be moved is brought close to the upper spindle, and the upper surface of the upper rim is brought into contact with the pressing surface of the main body portion before the lower surface of the upper spindle.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Balance (AREA)
  • Tires In General (AREA)

Abstract

L'invention concerne un mécanisme de remplacement de jante (50) qui comprend : un élément de pression (62) qui comprend un corps de ressort (63) et un corps (62A) comprenant une surface de pression (62S) pour appliquer une force de pression vers le bas à la surface supérieure (12S) d'une jante supérieure (12a) ; et un actionneur (61) qui déplace verticalement le corps (62A) dans une plage comprenant des positions supérieure et inférieure. La position inférieure est une position à laquelle la surface supérieure (12S) de la jante supérieure (12a) peut être séparée vers le bas de la surface inférieure (9S) de la broche supérieure (9a) par le déplacement vers le bas du corps (62A) vers la position inférieure tandis que la surface de pression (62S) du corps (62A) applique la force de pression vers le bas à la surface supérieure (12S) de la jante supérieure (12a). Le corps de ressort (63) est conçu pour appliquer la force de pression vers le bas au corps (62A) positionné à la position inférieure.
PCT/JP2019/010846 2018-03-28 2019-03-15 Mécanisme de remplacement de jante équipant à un testeur de pneumatique et procédé de remplacement de jante Ceased WO2019188414A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020207030201A KR20200128749A (ko) 2018-03-28 2019-03-15 타이어 시험기에 구비된 림 교환 기구 및 림 교환 방법
US16/981,952 US20210156765A1 (en) 2018-03-28 2019-03-15 Rim replacing mechanism provided to tire tester and rim replacing method
CN201980021177.0A CN111902707A (zh) 2018-03-28 2019-03-15 轮胎试验机所具备的轮辋更换机构以及轮辋更换方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2018062134 2018-03-28
JP2018-062134 2018-03-28
JP2019041876A JP2019174453A (ja) 2018-03-28 2019-03-07 タイヤ試験機に備えられたリム交換機構及びリム交換方法
JP2019-041876 2019-03-07

Publications (1)

Publication Number Publication Date
WO2019188414A1 true WO2019188414A1 (fr) 2019-10-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076330A (ja) * 1983-10-01 1985-04-30 Kobe Steel Ltd タイヤユニフオミテイマシン用リム装着装置
WO2010061845A1 (fr) * 2008-11-28 2010-06-03 株式会社神戸製鋼所 Dispositif de fixation de jante pour dispositif d’essai de pneumatique, procédé de fixation magnétique, dispositif de remplacement de jante et dispositif d’essai de pneumatique
JP2010151492A (ja) * 2008-12-24 2010-07-08 Kobe Steel Ltd 磁石取付方法及び磁石取外し方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076330A (ja) * 1983-10-01 1985-04-30 Kobe Steel Ltd タイヤユニフオミテイマシン用リム装着装置
WO2010061845A1 (fr) * 2008-11-28 2010-06-03 株式会社神戸製鋼所 Dispositif de fixation de jante pour dispositif d’essai de pneumatique, procédé de fixation magnétique, dispositif de remplacement de jante et dispositif d’essai de pneumatique
JP2010151492A (ja) * 2008-12-24 2010-07-08 Kobe Steel Ltd 磁石取付方法及び磁石取外し方法

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