KR20040057963A - Tire uniformity machine - Google Patents

Abstract

The tire uniformity machine of the present invention is configured to connect a pair of upper and lower spindles having concentrically mounted upper and lower rims holding the bead portions of the tires, and to connect the upper and lower spindles simultaneously while retaining each bead portion of the tires on the upper and lower rims. A first elevating mechanism for moving the lower spindle, a centering mechanism for matching the shaft center of the lower spindle to the shaft center of the upper spindle while wedge action by the pressing force of both spindles at the time of connecting the upper and lower spindles, and at the time of connecting the spindles It has a mechanical lock mechanism which combines so that it may become an opposing positional relationship, and produces | generates the connection force against a tire internal pressure at the time of tire inspection. As a result, the shift of the shaft center is sufficiently prevented without requiring high processing accuracy, and the measured cycle time is shortened. Moreover, the tire uniformity machine of this invention is equipped with the rim width adjustment mechanism which can be changed so that the rim width of the upper and lower rims when the upper and lower spindles are connected may correspond to the bead width of a tire. The rim width adjustment mechanism has a screw shaft member rotatably provided on the upper spindle, and an inner cylinder member screwed to the screw shaft member so as to be connectable to the lower spindle to move back and forth in the rim width direction by the rotation of the screw shaft member. have. Thereby, the rim width is changed while suppressing the enlargement of the rotation axis direction of the upper and lower rims.

Description

TIRE UNIFORMITY MACHINE {TIRE UNIFORMITY MACHINE}

The present invention relates to a tire uniformity machine for inspecting tire uniformity by rotating while supplying pressure air to the tire.

In general, a tire uniformity machine engages and holds each of the upper and lower bead portions from both sides by upper and lower rims, and then supplies pressure air into the tires to uniform the tires when the tires are rotated together with the upper and lower rims. It is configured to check. And since the tire uniformity machine comprised in this way respond | corresponds to the tire of various bead widths in the form of the small quantity production of the various types produced by the same factory, it is calculated | required that one be able to test | inspect the tire of various bead widths by one apparatus.

Therefore, conventionally, a rim connection mechanism consisting of hydraulic cylinders connecting the upper and lower rims is provided on the lower surface of the lower spindle with concentrically mounted lower rims, and a rim width setting mechanism consisting of hydraulic cylinders is provided on the lower surface of the interrim connection mechanisms. After the lower rim (lower spindle) is moved together with the inter-rim connecting mechanism by the rim width setting mechanism, the rim width corresponds to the bead width of the tire, and then the upper and lower rims are fastened and fixed by the inter-rim connecting mechanism. (See, for example, Japanese Patent Application Laid-open No. Hei 10-160643).

However, in the above conventional configuration, since the rim width setting mechanism and the rim connecting mechanism are arranged in series below the lower spindle, the tire uniformity machine becomes large in the vertical direction (the rotation axis direction of the upper and lower rims). Thus, when the height position for holding the tire is lowered by, for example, the upper and lower rims, or when the tire uniformity machine is to be lowered from the relationship with the ceiling height, the pit can be deeply dug and the rim width setting mechanism or the inter-rim connection mechanism. It is necessary to accommodate. As a result, there exists a problem that the installation cost at the time of introducing a tire uniformity machine becomes equal. And since this problem responds to the recent demand of small quantity production of many kinds, it becomes remarkable when it tries to expand the variable range of rim distance further.

Therefore, it is a 1st subject of this invention to provide the tire uniformity machine which can change rim width, suppressing the enlargement of the rotation axis direction of an up-and-down rim.

By the way, the conventional tire uniformity machine installs a male taper part and a female taper part inside an upper and lower rim, and arrange | positions both taper parts concentrically about the axis of an upper and lower rim. When the upper and lower rims are mounted, the upper and lower spindles are connected while the male taper portion is fitted and pressed while positioning in the radial direction along the inclined wall surface of the female taper portion. According to this connection, the upper and lower rims each hold the upper bead portion and the lower bead portion in an airtight state, and then the tire uniformity when the tire is rotated together with the upper and lower rims by supplying pressure air into the tire. (Uniformity) is configured (see, for example, Japanese Patent Laid-Open No. 6-134890).

In addition, in the related art, instead of pressing the male taper portion and the female taper portion in the above-described configuration and connecting the upper and lower spindles, the lock shaft is inserted into the upper and lower spindles, and the lock shaft is attached to the coupling portion and the lock shaft installed on the upper and lower spindles. A configuration is also proposed in which one coupled site is joined to connect the upper and lower spindles via the lock shaft (see, for example, Japanese Patent Application Laid-Open No. 11-223571).

However, in the structure of the above-mentioned Japanese Patent Laid-Open No. 6-134890, since the positioning is performed by fitting the male taper portion and the female taper portion, there is an advantage that the shaft center alignment of the upper and lower spindles can be easily performed. The spindle is only connected by pressing the male tapered portion and the female tapered portion. Therefore, when the tire inspection, when the reaction force in the spindle axial direction accompanying the tire internal pressure (reaction force is several ten tons even when the internal pressure of several kg / ㎠) is applied, the connecting force enough to connect the upper and lower spindles with sufficient drag force In order to achieve this, there is a problem in that a frame having a high rigidity sufficient to support reaction force, a large bearing, and a large hydraulic cylinder generating a large thrust greater than the reaction force are required, so that the enlargement of the apparatus cannot be avoided.

On the other hand, in the configuration of Japanese Unexamined Patent Application Publication No. H11-223571, the lock shaft is provided inside the spindle instead of connecting the upper and lower spindles by pressing the male tapered portion and the female tapered portion as in the configuration of Japanese Unexamined Patent Publication No. Hei 6-134890. The spindle is fixed to the lock shaft by inserting the coupling part inserted into the spindle and the engaged part installed on the lock shaft. Therefore, the spindle and the lock shaft have a sufficient drag force and a connection force can be obtained when the reaction force accompanying tire internal pressure is applied at the time of tire measurement, without enlarging the frame and increasing the size of the hydraulic cylinder or the bearing. However, in view of inserting the lock shaft inside the spindle, there is a problem that the gap between them cannot be avoided, and the misalignment caused by this adversely affects the measurement accuracy. In this problem, the gap may be made as small as possible, but the gap cannot be made small enough to sufficiently prevent seam shift due to limitations in machining accuracy and assembly accuracy. In addition, in the configuration of No. 11-223571, it is necessary to reduce the speed sufficiently so that both do not touch and break before the lock shaft is inserted into the spindle, which also causes a problem that the cycle time becomes long.

Therefore, it is a 2nd subject of this invention to provide the tire uniformity machine which can fully prevent the displacement of an axis, without requiring high processing precision, and can shorten the measured cycle time.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the principal part of a tire uniformity machine.

2 is an explanatory diagram showing an overall configuration of a tire uniformity machine viewed from the front;

3 is an explanatory diagram showing an overall configuration of a tire uniformity machine viewed from a plane;

4 is an explanatory diagram showing a main part of a tire uniformity machine;

5 is a schematic configuration diagram of a rotation detection mechanism.

6 is a schematic configuration diagram of a mechanical lock mechanism and a centering mechanism.

7 is an explanatory diagram of a mechanical lock mechanism and a centering mechanism.

Fig. 8 is an explanatory diagram showing an overall configuration of the tire uniformity machine viewed from the front;

<Explanation of symbols for the main parts of the drawings>

1: tire

2: upper rim

3: lower rim

4: upper spindle

5: lower spindle

6: ceiling frame

10: feet

11: lower rim holding mechanism

12: first rising mechanism

15: nut member

20: lower rim support member

23: rod lifting cylinder

26: air piping

32: no hook

33: hook support

41: inner cylinder member

42: outer cylinder member

43: guide key

45: screw shaft member

46: spindle barrel member

50: centering mechanism

51: cullet member

52: pressure mechanism

S: axis of rotation

In order to solve the first problem, the tire uniformity machine of the present invention includes a rim holding a bead portion of a tire, a first and second pair of spindles on which the rim is mounted concentrically, and the first and first And a rim width adjustment mechanism that can be changed to correspond to the bead width of the tire when the two spindles are connected to each other, wherein the rim width adjustment mechanism includes a screw shaft member rotatably provided on the first spindle; It consists of an inner cylinder member which can be connected to the said 2nd spindle, and was screwed to the said screw shaft member so that it may move forward and backward in the rim width direction by rotation of the said screw shaft member.

According to the above configuration, since the rim width adjusting mechanism is provided in the first spindle, the rim is suppressed in size in the rotation axis direction of the rim of the tire uniformity machine as compared with the case where the rim width adjusting mechanism is disposed outside the spindle. You can change the width. As a result, when the tire uniformity machine is introduced such that the direction of rotation axis coincides with the vertical direction, for example, the pit for accommodating the spindle can be made shallower, thereby reducing the cost required when introducing the equipment. can do. In addition, when the screw shaft member is rotated, the inner cylinder member can be moved forward and backward to adjust the rim width, thereby simplifying the structure. In addition, since the rotation of the screw shaft member can be easily controlled using a general detection sensor or a control device, for example, if the bead width of the tire is known in advance, the rim width can be easily set automatically to the bead width. have.

In the tire uniformity machine of the above configuration, the rim width adjusting mechanism is connected to and disconnected from an outer cylinder member having a rim mounted thereon, a spindle drive for rotationally driving the outer cylinder member, and the outer cylinder member and the screw shaft member. May be configured to have a switchable clutch mechanism.

According to the above structure, the spindle drive device can be used for the purpose of adjusting the rim width of the spindle drive device by switching the clutch mechanism, and for the purpose of inspecting the tire by rotating the rim.

Here, the screw shaft member and the inner cylinder member are inserted into the outer cylinder member, a key groove is formed in the rim width direction on the outer circumferential surface of the inner cylinder member, and a guide key is movable in the outer cylinder member to the key groove. It is characterized in that it is fitted to.

According to the above structure, the movement of the rim width direction of the inner cylinder member by rotation of a screw shaft member can be implement | achieved by a simple structure.

Moreover, in the tire uniformity machine of this invention, you may comprise so that the said rim width adjustment mechanism may be provided with the brake mechanism which can prohibit rotation of the said screw shaft member.

According to the above structure, the screw shaft member can be reliably stopped, so that the rim width can be adjusted accurately.

Moreover, the tire uniformity machine of this invention WHEREIN: The rotation detection mechanism which detects the rotation state of the said outer cylinder member and the said screw shaft member, respectively, and the function which monitors the operation state based on each said rotation state are provided. You may comprise so that it may have a control apparatus. Examples of the monitoring of the operation state include determining whether or not the rim width adjustment is correctly performed.

According to the above configuration, malfunctions at the time of rim width adjustment or tire inspection can be detected.

In order to solve the second problem, the tire uniformity machine of the present invention includes a rim holding a bead portion of a tire, and a first and second pair of spindles on which the rim is mounted concentrically. A spindle movement mechanism for holding each bead portion and for moving at least one side including the first spindle in the pair of spindles to connect the pair of spindles together, both spindles in connection with the spindles; Compresses the internal pressure of the tire at the time of tire inspection by combining the centering mechanism for matching the shaft center of the second spindle to the shaft center of the first spindle and the positional relationship opposite to each other when the spindles are connected while exerting a wedge action by the pressing force. It consists of a lock mechanism for generating a connecting force.

According to the above-described configuration, since the centering mechanism is configured to adjust the shaft center of the second spindle while elastically reducing the diameter by the pressing force in the inner circumferential direction of the first spindle, the spindle functions as a cushion when connecting the spindle with the connecting force of the lock mechanism. The centering function to match the center of gravity can be exhibited. This makes it possible to reliably match the shaft centers of the spindles without causing any damage even if some deviation occurs in the shaft centers of the spindles due to the low processing accuracy and the assembly precision of each component, for example. . It is also possible to connect the spindle by moving it at high speed. As a result, the shift of the shaft center can be sufficiently prevented without requiring high processing accuracy, and the measured cycle time can be shortened.

In the tire uniformity machine of the above constitution, the centering mechanism is fitted into the sliding side circumferential surface of the second spindle, and has a cullet member whose outer circumferential surface is inclined so that the outer diameter decreases toward the first spindle, You may comprise so that the 1st spindle may be formed with the inner peripheral inclined surface which can be fitted to the said collet member so that the pressing force of the said inner peripheral direction may be given with respect to the outer peripheral surface of a cullet member.

According to the above configuration, the centering mechanism can be formed by a general chuck chuck method. In addition, since a large gap is formed in the radial direction when fitting the cullet member to the inner circumferential inclined surface, the cullet member can be reliably fitted to the inner circumferential inclined surface even if a large deviation occurs in the axis of the spindles.

In addition, the centering mechanism having the cullet member may be configured to have a pressing mechanism that urges the cullet member in the direction of the first spindle.

According to the above configuration, even when both spindles in the connected state are slightly separated in the axial direction due to the reaction force of the tire, the pressing mechanism moves the cullet member in one spindle direction and maintains the fitting state, so that it is applied to the cullet member. The pressure is not reduced. Thereby, the centering function of the connection initial stage can be maintained.

Further, the centering mechanism having the cullet member having the pressing mechanism elastically reduces the diameter of the cullet member by the pressing force in the inner circumferential direction of the first spindle, and the cullet member and the second spindle when the centering function is exerted. May be configured to press with a pressing force larger than the frictional force with respect to the sliding side peripheral surface.

According to the above configuration, a stable centering function can be exhibited.

Another tire uniformity machine of the present invention for solving the second problem is a rim holding a bead portion of a tire, a first and a second pair of spindles in which the rim is mounted concentrically, the first spindle The concave connection portion provided, the convex connection portion provided on the second spindle, and each bead portion of the tire to be held on the rim, and the convex connection portion is inserted into the concave connection portion to connect the pair of spindles to each other. A spindle moving mechanism for axially moving at least one of the pair of spindles, so that wedging occurs in a gap formed around the spindle between the pair of spindles when the pair of spindles are connected; Centering mechanism having a wedge-shaped sleeve interposed in the gap and the position opposite to each other when the pair of spindles are connected And a locking mechanism provided with the concave connection portion and the convex connection portion so as to have a relationship, and which generates a connection force against tire internal pressure during tire inspection by engagement of the coupling portion.

According to the above arrangement, when the centering mechanism connects the spindles with the connecting force of the lock mechanism by inserting the convex connecting portion of the second spindle into the concave connecting portion of the first spindle, the wedge-shaped sleeve between both connecting portions is used. By the wedge action, the shaft center of spindle can be adjusted. Therefore, when connecting a spindle, the centering function which makes a spindle center coincide with each other can be exhibited. This allows the spindle to be centered while being guided by a wedge-shaped sleeve, even if some deviation occurs in the shaft centers between the spindles, for example, due to low machining accuracy or assembly precision of each component. It is possible to reliably match the shaft centers between the spindles. It is also possible to connect the spindle by moving it at high speed. As a result, the shift of the shaft center can be sufficiently prevented without requiring high processing accuracy, and the measured cycle time can be shortened.

In the tire uniformity machine of the above configuration, the wedge-shaped sleeve of the centering mechanism may be a cullet member. Thereby, the function of the wedge-shaped sleeve can be exhibited easily and largely by a general member.

In the tire uniformity machine of the above configuration, the centering mechanism may be configured to have a pressing mechanism for pressing the wedge-shaped sleeve in a direction in which wedge action is intensified. Thereby, the fall of the centering function at the time of tire inspection can fully be prevented. In addition, the cushion function when connecting the spindle can be enhanced.

In the tire uniformity machine of the above constitution, the lock mechanism may be configured to engage the other side by operating the at least one of the portions while the engaging portion has at least a portion having an uneven portion. As a result, the locking mechanism can be realized by a simple structure.

In the tire uniformity machine of the above configuration, the concave connecting portion may be configured by a cylindrical member having a variable position in the axial direction with respect to the spindle on the side where the concave connecting portion is provided. Thereby, it can adjust to arbitrary rim widths by moving a cylindrical member forward and backward in an axial direction.

In the tire uniformity machine of the above constitution, the cylindrical member may be configured to be variable in position by a jack mechanism having a female screw provided to the cylindrical member and a male screw screwed thereto. Thereby, the cylindrical member can be moved forward and backward with a simple configuration.

Embodiments of the present invention will be described below with reference to Figs.

As shown in FIG. 2, the tire uniformity machine according to the present embodiment includes an upper rim 2 holding the upper bead portion of the tire 1 and a lower rim holding the lower bead portion of the tire 1. Has (3) The upper rim 2 is detachably attached to the front end (lower end) of the upper spindle 4. On the other hand, the lower rim 3 is detachably attached to the distal end portion (upper end portion) of the lower spindle 5. Both spindles 4 and 5 oppose the upper rim 2 and the lower rim 3, and coincide the shaft centers of the two rims 2 and 3 on the same straight line.

The upper spindle 4 and the lower spindle 5 are provided in the ceiling frame 6 and the base frame 8, respectively. These frames 68 are supported by a plurality of longitudinal mounting frames 7 so that the ceiling frames 6 are horizontally arranged in the upper position and the base frames 8 are horizontally arranged in the lower position. Each longitudinal installation frame 7 is installed in the vertical direction from the ground surface 9. The ground surface 9 is provided with the pit 10 in the center part of the area | region enclosed by the longitudinal installation frame 7.

The said pit 10 makes it possible to receive the lower part of the lower spindle 5. The lower spindle 5 includes a lower rim holding mechanism 11 for detachably holding the lower rim 3, a first lifting mechanism 12 for raising and lowering the lower rim holding mechanism 11, and a lower rim The 2nd lifting mechanism 13 which raises and lowers the holding mechanism 11 with the 1st lifting mechanism 12 is provided. The second lifting mechanism 13 includes a horizontal support member 14 for supporting the lower rim holding mechanism 11, a nut member 15 provided at a base of the horizontal support member 14, and a nut member 15. Has a ball screw member 16 which is screwed and is installed in the vertical direction, and a ball screw drive motor 17 which drives the ball screw member 16 to rotate.

And the 2nd lifting mechanism 13 comprised in this way raises and lowers the nut member 15 by rotating the ball screw member 16 in a desired direction and angle by the ball screw drive motor 17, and this nut member 15 It is possible to position the first elevating mechanism 12 at a desired height position via the horizontal support member 14 connected to the. In addition, the first lifting mechanism 12 is capable of moving the lower rim holding mechanism 11 to the tire holding position.

The horizontal support member 14 in the above described second lifting mechanism 13 supports the first lifting mechanism 12 in the vertical direction. The 1st lifting mechanism 12 is arrange | positioned in the side of the 2nd lifting mechanism 13 in parallel. Thereby, the 1st lifting mechanism 12 and the 2nd lifting mechanism 13 make the maximum distance which raises and lowers the lower rim holding mechanism 11 with these mechanisms 12 and 13 by the stroke amount of one hydraulic cylinder. It is shortened rather than realization, and the required depth of the pit 10 is reduced.

The first lifting mechanism 12 is composed of a hydraulic cylinder arranged such that the cylinder rod 12a is located above. The tip end (upper end) of the cylinder rod 12a is connected to the lower rim holding mechanism 11. Moreover, when the 1st lifting mechanism 12 is raised to the tire detachment position by the 2nd lifting mechanism 13, the tire 1 by the both rims 2 and 3 is moved by the advancing / removing movement of the cylinder rod 12a. I let you put on and take off it.

The lower rim holding mechanism 11 which is lifted up and down by both lifting mechanisms 12 and 13 as described above has a lower rim supporting member 20 for holding the lower rim 3 as shown in FIG. . Here, FIG. 1 shows a state in which the rotation shaft S is sandwiched with a large open between the rims 2 and 3 (right side in the figure) and a small open between the rims 2 and 3 (left side in the figure). . The lower rim support member 20 is formed at the lower end side of the recess 20a formed at the center of the upper end face, the sliding side peripheral face 20b formed on the outer circumferential wall of the upper end, and the sliding side peripheral face 20b. It has the flange part 20c. The recessed part 20a and the sliding side peripheral surface 20b support the mechanical lock mechanism 30 and the centering mechanism 50 mentioned later, respectively. The flange portion 20c is formed to support the lower surface of the inner circumference side of the lower rim 3. Moreover, the mechanical lock mechanism 30 and the centering mechanism 50 comprise the convex connection part for connecting the upper and lower spindles 4 and 5 comrades.

In the lower rim support member 20, the circumferential surface below the flange portion 20c is surrounded by the outer cylinder support 22. The outer cylinder support member 22 rotatably supports the lower rim support member 20, and at the same time, lifts the lower rim holding mechanism 11 via the outer cylinder support 22. It is supported by the rod 12a. The air supply hole 22a is formed in the lower part of the outer cylinder support body 22 from the outer peripheral surface to the inner peripheral surface. The upper end of the air pipe 26 is connected to the air supply hole 22a. As shown in FIG. 2, the air pipe 26 is vertically lowered from the lower rim holding mechanism 11 along the first lifting mechanism 12 to be supported by the horizontal support member 14 so as to be lifted and lowered. The lower end is located in 10. The lower end of the air pipe 26 is connected to an air supply measure via an air hose not shown.

As shown in Fig. 1, a rod insertion hole 20d corresponding to the rotation axis S (axial center of the lower rim 3) is formed inside the lower rim support member 20, and at the same time, the rod insertion tube is formed. The air supply hole 20e is formed along the hole 20d. The air supply hole 20e has the upper end opened at a position above the flange portion 20c of the lower rim support member 20, and the lower end communicates with the air supply hole 22a of the outer cylinder support 22, whereby the above-mentioned air The pressure air from the supply device can be supplied into the tire 1 held by the rims 2 and 3.

On the other hand, the rod member 24 is inserted into the rod insertion hole 20d so as to be lifted and lowered. The lower end of the rod member 24 is rotatably connected to the cylinder rod 23a of the rod elevating cylinder 23. The rod elevating cylinder 23 is fixed to the lower surface of the outer cylinder support body 22. The rod elevating cylinder 23 is configured to relatively move the rod member 24 in the vertical direction with respect to the lower rim support member 20.

The upper end of the rod member 24 is connected to the mechanical lock mechanism 30. The mechanical lock mechanism 30 has a conical inclined member 31 having a lateral circumferential surface inclined, a hook member 32 in which the inner circumferential surface is slidably contacted with the lateral circumferential surface of the inclined member 31, and a hook member ( The hook support body 33 which supports 32 so that a movement to a radial direction is provided. The hook member 32 has the uneven part 32a in the outer peripheral surface. The uneven part 32a of the hook member 32 is able to engage the uneven part 41a formed in the inner cylinder member 41 of the upper spindle 4. As a result, the mechanical lock mechanism 30 can move the hook member 32 in the radial direction along the circumferential surface of the inclined member 31 by the lifting and lowering of the inclined member 31. And the mechanical lock mechanism 30 engages the uneven part 32a with the uneven part 41a of the inner cylinder member 41 of the upper spindle 4 by advancing of the grappling member 32, and thereby the upper spindle 4 And the lower spindle 5 are fixed in the up-down direction. That is, the mechanical lock mechanism 30 is coupled so that the two spindles 4 and 5 become opposite positional relations spaced apart from each other by a predetermined distance (gap) when the upper and lower spindles 4 and 5 are connected to each other. It is designed to generate a connection force against internal pressure.

The centering mechanism 50 is provided below the outer circumferential direction of the mechanical lock mechanism 30 described above. The centering mechanism 50 has a cullet member 51, which is a kind of a wedge-shaped sleeve having a wedge-shaped longitudinal section that matches the axial center of the lower rim support member 20 with the axial center of the inner cylinder member 41, and the cullet member 51 above. A plurality of pressing mechanisms 52 for pressing in the direction are provided.

As shown in Figs. 1 and 6, the cullet member 51 has an outer appearance of a conical sleeve, and is inserted into the sliding side circumferential surface 20b of the lower rim support member 20 so that the shaft center is lowered. It is provided so as to match the axis of the rim support member 20, that is, the axis of the lower rim 3 (the other spindle). The cullet member 51 is provided with the elastic force, and the outer peripheral surface 51a is inclined so that an outer diameter may increase from the upper side to the lower side. Moreover, the some slit 51b is formed in the outer peripheral surface 51a of the cullet member 51 at equal intervals in the up-down direction. These slits 51b are formed so that the open ends are alternately positioned, and the inner diameter is easily and greatly reduced by elastically reducing the cullet member 51 with the pressing force in the inner circumferential direction.

As shown in FIG. 7, the above-mentioned cullet member 51 is fitted to the concave connecting portion of the inner cylinder member 41. As shown in FIG. The curling member 51 has a wedge action in the gap formed in the spindle circumferential direction between both connecting portions when the upper and lower spindles 4 and 5 are connected to each other. Moreover, the concave connection part of the inner cylinder member 41 has the inner peripheral inclined surface 41b which increased the inner diameter from the upper side to the inner peripheral wall of the lower end part. The inner circumferential inclined surface 41b is provided with a pressing force in the inner circumferential direction with respect to the outer circumferential surface 51a of the cullet member 51 when the cullet member 51 of the convex connection portion is inserted and fitted into the concave connection portion of the inner cylinder member 41. The diameter of the cullet member 51 is reduced by providing it. As a result, the centering mechanism 50 causes the cullet member 51 to elastically shrink in diameter to fasten the entire circumference of the sliding side peripheral surface 20b while the inner core member 41 receives the shaft center of the lower rim support member 20. The centering function is made to match the center of gravity.

Said cullet member 51 is urged | biased upward by the press mechanism 52, ie, the direction where the wedge action | strength becomes strong in the cullet member 51. FIG. The pressing mechanism 52 is arrange | positioned at equal intervals in the attachment root part of the flange part 20c of the lower rim support member 20. As shown in FIG. The pressing mechanism 52 is provided in the shape of a bolt and has a pressing member 53 in contact with the lower surface of the cullet member 51 and a spring member 54 for pressing the pressing member 53 upward. The pressing force of the spring member 54 is set to be greater than the frictional force of the slidable side peripheral surface 20b of the cullet member 51 and the lower rim support member 20 when the centering function is exerted. As a result, when the lower spindle 5 is lowered while the inner cylinder member 41 and the cullet member 51 are exerting a centering function, the cullet member 51 is pulled up and the positional relationship with the inner cylinder member 41 is achieved. By keeping it constant, the deterioration of the centering function is prevented.

Further, the pressing force of the spring member 54 is a positional relationship between the cullet member 51 and the inner cylinder member 41 even when the lateral load when the drum 102 of FIG. 2 is pressed against the tire 1 in the inflation state acts. It is set to a value that does not change. As a result, the wedge action is maintained even at the time of inspecting the tire 1, so that the centering function can be reliably exhibited.

The inner cylinder member 41 is accommodated in the outer cylinder member 42 as shown in FIG. These inner cylinder members 41 and outer cylinder members 42 constitute a part of the rim width adjustment mechanism 58 together with the screw shaft member 45 described later. The outer cylinder member 42 is provided with the flange part 42a in the lower outer peripheral part so that it may function as an upper rim holding mechanism. Moreover, the upper rim detection sensor 28 (not shown) is arrange | positioned outside the flange part 42a.

In addition, the inner cylinder member 41 is provided with the above-mentioned uneven | corrugated part 41a and the inner peripheral inclined surface 41b in the inner peripheral surface, and the horizontal tongue part 41c is formed inside. The horizontal tongue part 41c is set so that the uneven part 32a of the hook member 32 may face the uneven part 41a of the inner cylinder member 41 when it contacts the upper surface of the hook support body 33. Moreover, the key groove 41e is formed in the up-down direction in the outer peripheral surface of the inner cylinder member 41. As shown in FIG. The guide key 43 is fitted to the key groove 41e to be movable. The guide key 43 is fixed to the outer cylinder member 42 so as to prohibit rotation of the inner cylinder member 41 with respect to the outer cylinder member 42.

Moreover, the female screw part 41d is formed in the upper end part of the inner cylinder member 41. As shown in FIG. The female screw portion 41d is screwed to the male screw portion 45a formed at the lower portion of the screw shaft member 45. The screw shaft member 45 constitutes a jack mechanism, and the inner cylinder member 41 is variably positioned in the axial direction with respect to the lower spindle 5. Specifically, the screw shaft member 45 is arrange | positioned so that an axial center may correspond to the rotating shaft S, as shown in FIG. 4, and the upper part is supported by the spindle cylinder member 46 so that rotation is possible. The spindle cylinder member 46 is rotatably supported by the ceiling frame 6, and the lower end is connected to the upper end of the outer cylinder member 42.

In addition, a clutch mechanism 47 is provided at the upper end of the screw shaft member 45. The clutch mechanism 47 is capable of switching the connection and disconnection between the screw shaft member 45 and the spindle cylinder member 46. Specifically, the clutch mechanism 47 is connected to the screw shaft member 45 and the spindle cylinder member 46 in a fixed state so that both members 45 and 46 can be rotated integrally. Doing. On the other hand, the clutch mechanism 47 releases the connection between the screw shaft member 45 and the spindle cylinder member 46 in the OFF state, and enables the respective members 45 and 46 to rotate independently.

In addition, a brake disk 48 is provided at the upper end of the screw shaft member 45. The brake disc 48 can be pinched by the brake device 49. The brake apparatus 49 is fixed to the ceiling frame 6 via the support member which is not shown in figure. The brake device 49 is turned on when the rotation of the screw shaft member 45 is prohibited, and the brake device 49 is turned on when the brake disk 48 is clamped and the rotation of the screw shaft member 45 is allowed. The disk 48 is opened.

In addition, the spindle drive device 56 is provided in the ceiling frame 6. The spindle drive device 56 is connected to the spindle cylinder member 46 via the drive belt 57, and the spindle cylinder member 46 is rotatable in an arbitrary direction and speed. In this way, the upper spindle 4 including the inner cylinder member 41, the outer cylinder member 42, the screw shaft member 45, and the spindle cylinder member 46 in the axial direction has the clutch mechanism 47 turned on and By operating the spindle drive device 56 while turning the brake device 49 off, it is possible to integrally rotate the entire members 41, 42, 45, 46 in the axial direction. Further, the upper spindle 4 operates the spindle drive device 56 with the clutch mechanism 47 in the off state and the brake device 49 in the on state, and the inner cylinder member (with respect to the fixed screw shaft member 45) is operated. By rotating 41, the inner cylinder member 41 can be moved forwards and backwards with respect to the outer cylinder member 42. As shown in FIG.

The rotation direction, the rotation speed, and the rotation angle of the screw shaft member 45 and the spindle cylinder member 46 of the upper spindle 4 are detectable by the rotation detection mechanism 60. As shown in FIG. 5, the rotation detection mechanism 60 includes a first pulley 63 connected to the screw shaft member 45 via a first belt 61, and a second belt It has a second pulley 64 connected via 62. The first pulley 63 is connected to the first gear 67 in the housing 65 via a first rotational shaft 66 rotatably pivotally supported by the housing 65.

On the other hand, the second pulley 64 is connected to the second gear 69 in the housing 65 via a second rotational shaft 68 pivotally pivotally supported by the housing 65 and at the outside of the housing 65. It is connected to the third pulley 70. The third pulley 70 is connected to the fourth pulley 72 via the third belt 71, and the fourth pulley 72 is made of an encoder of the incredible metal type via the third rotation shaft 73. It is connected to one rotation detector 74. Thereby, the 1st rotation detector 74 transmits the rotation of the spindle cylinder member 46 of FIG. 4 via the 2nd belt 62, the 3rd pulley 70, the 4th pulley 72, etc. The rotation speed (rotation angle) of the cylinder member 46 can be detected and output as an angle detection signal.

Further, the second gear 69 in the housing 65 that rotates with the first rotation detector 74 is engaged with the first bevel gear 76 via the fourth gear 75. The first bevel gear 76 is rotatably provided on the shaft member 77 rotatably supported by the housing 65. The fixing member 78 is fixed to the shaft member 77, and the second bevel gear 79 is rotatably provided by sandwiching the fixing member 78. The second bevel gear 79 is engaged with the above-described first gear 67 to which the rotation of the screw shaft member 45 of FIG. 4 is transmitted. Further, the first bevel gear 76 and the second bevel gear 79 are meshed with the planetary gear 80. The planetary gear 80 is pivotally supported on the side of the fixing member 78.

Thus, when the spindle cylinder member 46 of FIG. 4 is rotated while the first gear 67 is fixed by the stop of the screw shaft member 45 of FIG. 4, the first gear 67 is engaged with the first gear 67. Since the second bevel gear 79 is also fixed, the planetary gear 80 passes through the first bevel gear 76 when the second gear 69 is rotated by the rotation of the spindle barrel member 46 of FIG. As a result of rotating around the shaft member 77, the shaft member 77 rotates. In addition, when the spindle cylinder member 46 of FIG. 4 is rotated while the first gear 67 is rotated by the rotation of the screw shaft member 45 of FIG. 4, the first mesh 67 is engaged with the first gear 67. Since the second bevel gear 79 also rotates in the same direction, the first bevel gear 76 rotates at a predetermined position when the second gear 69 is rotated by the rotation of the spindle barrel member 46 of FIG. The shaft member 77 is stopped.

The fifth pulley 81 is provided at one end of the shaft member 77. The 5th pulley 81 is connected to the 2nd rotation detector 84 which consists of an encoder of an up-solute system via the 4th belt 82 and the 5th pulley 83. As shown in FIG. Then, the second rotation detector 84 detects the origin of the spindle cylinder member 46 and outputs it as an origin detection signal only when the screw shaft member 45 of FIG. 4 is stopped and the spindle cylinder member 46 is rotating. It is possible.

The rotation detection mechanism 60 comprised as mentioned above is connected to the control apparatus which is not shown in figure. The control device includes a calculation unit, a storage unit, an input / output unit, and the like. The storage unit is provided with various data areas such as a tire data area, a rim width data area and a test data area. In addition, the tire data area stores data such as the type of the tire 1, the bead width of each type, and the rotational speed corresponding to each type. The rim width data area stores rim width data, which is an interval between the upper rim 2 and the lower rim 3. The test data area stores inspection data obtained by rotating the tire 1.

The storage unit also stores a control program for controlling the operation of the tire uniformity machine. The control program calculates the bead width of the tire 1 on the basis of the varieties data inputted by operating the input / output unit, and based on the origin detection signal and the angle detection signal so as to become the rim width corresponding to the bead width. The angle is set so as to be an inspection specification such as rotational speed or rotational speed corresponding to the varieties data based on the rim width setting function for moving the 41) forward and backward with respect to the outer cylinder member 42 or the inspection command by operating the start button of the input / output unit. An inspection function for performing inspection on the basis of the detection signal, an abnormal operation detection function for confirming the presence or absence of abnormal operation on the basis of the origin detection signal and the angle detection signal, and the rim (2, 3) on which the inspection is finished. And various functions such as import and export functions for attaching the tire 1 before the inspection to the rims 2 and 3 while removing the material from the vehicle.

The rotation detection mechanism 60 which outputs an origin signal or an angle detection signal to a control apparatus as mentioned above is provided in the ceiling frame 6 as shown in FIG. An intermediate frame 85 is provided horizontally in the substantially center portion of the longitudinal mounting frame 7 supporting the ceiling frame 6. The intermediate frame 85 is provided with a pair of tire mounting tables 86 and 86 symmetrically. These tire mounting bases 86 and 86 are capable of expanding and contracting the gap according to the outer diameters of the rims 2 and 3, and by adjusting the intervals slightly wider than the rims 2 and 3, the tires to the lower rim 3 I put on and take off of (1).

Moreover, the tire conveyance mechanisms 87 and 87 are provided in the outer side of each tire mounting stand 86 and 86, respectively. As shown in FIG. 3, the tire conveyance mechanism 87 rotates the holding members 88 and 88 for holding the tread part of the tire 1, and rotates each holding member 88 and 88 in the tire 1 direction. The conveying cylinder 91 which provides the holding mechanism 90 provided with the rotation apparatus 89, 89 in two conveyance directions (horizontal direction), and moves these holding mechanisms 90, 90 forward and backward in a conveyance direction. Have The carrying-in roller 92 and the carrying-out roller 93 are respectively provided before and behind a conveyance direction centering on the arrangement | positioning position of the upper spindle 4 and the lower spindle 5, respectively. And the tire conveyance mechanism 87 mentioned above grasps the tire 1 before the inspection on the carrying-in roller 92 by the one holding | gripping mechanism 90, by advancing the conveyance cylinder 91, and at the inspection position [ The tire 1 after the inspection on the rims 2 and 3 is gripped by the other holding mechanism 90 and the conveying cylinder 91 is retracted, thereby moving the tire 1 before the inspection to the inspection position. It is possible to move the tire 1 after the inspection on the carrying out roller 93.

As shown in Fig. 2, a measuring mechanism 97 is provided on the side of the lower end of the upper spindle 4 between the intermediate frame 85 and the ceiling frame 6. The measuring mechanism 97 rotatably supports the drum 102 for simulating the road surface for inspection and the drum 102 so that the axis of rotation of the drum 102 is parallel to the center of rotation of the tire 1 (upper and lower rims). The drum support 99, a load cell (not shown) that is provided at the shaft center of the drum 102 and measures the uniformity of the tire 1 via the drum 102, and the drum 102 is attached to the tire 1. The ball jack 100 which presses by predetermined pressing force is provided.

In the above configuration, the operation of the tire uniformity machine will be described.

(Data entry process)

First, by operating an input / output unit in a control device (not shown), for example, a keyboard, varietal data, quantity data, and the like of the tire 1 to be inspected next are inputted by an operator. The variety data is used to collect specifications such as the bead width and tire inner diameter of the tire 1 corresponding to the variety data stored in advance. Thereafter, it is determined whether the rim widths of the upper and lower spindles 4 and 5 correspond to the bead widths of the tire 1 to be inspected, and if it does not correspond to the bead widths, the rim width adjusting step is executed. Then, when the setting of the rim width is completed, an inspection step of performing the uniformity measurement of the tire 1 is executed.

(Rim width adjustment process)

If the rim widths of the upper and lower spindles 4 and 5 do not correspond to the bead width of the tire 1, this process is executed. First, as shown in FIG. 4, the positional relationship of the outer cylinder member 42 and the inner cylinder member 41 which set the present rim width is confirmed. Then, based on this positional relationship, the amount of movement (elevation amount) of the inner cylinder member 41 required for installation at the next rim width is determined, and then the rotational direction and the number of rotations of the inner cylinder member 41 serving as the movement amount are determined. .

Next, the clutch mechanism 47 is operated to be in an off state so that the connection between the screw shaft member 45 and the spindle cylinder member 46 is released, and the brake device 49 is operated in an on state to thereby provide a brake disc ( The rotation of the screw shaft member 45 is inhibited by 48 being clamped. As a result, only the spindle cylinder member 46 is in a rotatable state.

Next, the spindle drive device 56 is operated to rotate the spindle barrel member 46 in a predetermined direction. Thereby, the outer cylinder member 42 connected to the spindle cylinder member 46 rotates. In addition, since the outer cylinder member 42 and the inner cylinder member 41 are movably connected only in the up-down direction via the guide key 43, the inner cylinder member 41 also rotates together with the outer cylinder member 42. As a result, the inner cylinder member 41 is rotated around the fixed screw shaft member 45 so that the female threaded portion 41d of the inner cylinder member 41 is screwed to the male threaded portion 45a of the screw shaft member 45. While moving up and down.

When the spindle cylinder member 46 is rotated as described above, this rotation is transmitted to the rotation detection mechanism 60 via the second belt 62. Thereby, as shown in FIG. 5, the 3rd pulley 70 connected to the 2nd belt 62 via the 2nd pulley 64 rotates, and the 1st rotation detector 74 rotates, and a spindle cylinder member ( The rotation speed (rotation angle) of 46 is output to a control device (not shown) as an angle detection signal.

In addition, the second gear 69 connected to the second belt 62 via the second pulley 64 also rotates to rotate the first bevel gear 76. At this time, as described above, since the screw shaft member 45 of FIG. 4 is fixed, the first gear (connected to the screw shaft member 45 via the first belt 61 and the first pulley 63) 67) and the second bevel gear 79 are kept fixed. Therefore, as the planetary gear 80 rotates around the shaft member 77 via the first bevel gear 76, the shaft member 77 rotates. As a result, the second rotation detector 84 is rotated via the fifth pulley 81, and the origin detection signal is output from the second rotation detector 84 to a control device (not shown).

The phases of both signals are obtained from the angle detection signal and the origin signal output to the control device, and it is determined whether the rim width adjustment is correctly performed based on the change of this phase. In addition, the reference position is set based on the origin signal, and the rotation speed of the spindle cylinder member 46 is determined based at least on the angle detection signal, and the amount of movement of the inner cylinder member 41 based on this rotation speed ( Lifting amount) is detected. And when the target movement amount reaches, as shown in FIG. 4, the rotation of the spindle cylinder member 46 will be stopped by the stop of the spindle drive 56. As shown in FIG.

(Inspection process)

In the case of the rim width corresponding to the tire 1 to be inspected, this step is executed. First, as shown in FIG. 2, the lower rim holding mechanism 11 is set at a predetermined height position by the second lifting mechanism 13 together with the first lifting mechanism 12. Thereafter, the first lifting mechanism 12 is lowered so that the upper surface of the lower rim 3 is positioned below the tire mounting bases 86 and 86.

Next, as shown in FIG. 3, the tire 1 before inspection loaded on the carrying-in roller 92 is gripped by the holding mechanism 90, and the tire loading stand 86 located between the upper and lower rims 2 and 3 is shown. 86) are loaded to go. Thereafter, as shown in Fig. 4, the lower rim 3 is lifted by the first elevating mechanism 12 to hold the lower bead portion of the tire 1. Then, the lower rim 3 is further raised in the state of holding the tire 1 so that the upper bead portion of the tire 1 is mounted on the upper rim 2, and the upper portion having the upper and lower rims 2, 3 is provided. The spindle 4 and the lower spindle 5 are connected.

That is, as shown in Fig. 1, when the lower rim holding mechanism 11 of the lower spindle 5 is raised, the tip portion (convex connecting portion) of the lower rim supporting member 20 is concave connecting portion of the inner cylinder member 41. Is inserted into As shown in FIG. 7, the cullet member 51 (wedge-shaped sleeve) inserted into the sliding side peripheral surface 20b of the lower rim support member 20 is an inner circumferentially inclined surface (of the inner cylinder member 41). 41b) is brought into contact with each other, and the entire outer circumferential surface 51a of the cullet member 51 is urged in the inner circumferential direction by the inner circumferential inclined surface 41b of the inner cylinder member 41 as the lower rim support member 20 rises. . As a result, the cullet member 51 performs a wedge action and centers the shaft center of the inner cylinder member 41 to match the shaft center of the inner cylinder member 41.

Further, at this time, the cullet member 51 is elastically reduced in diameter while being guided by the inner circumferential inclined surface 41b, and is pressed in the upper direction than the pressing mechanism 52 to be located in the upper portion. Therefore, even when the lower rim support member 20 is raised and fitted rapidly, the collet member 51 is damaged since the diameter reduction operation of the elastic cullet member 51 and the pressing mechanism 52 function as a cushion. It is difficult. Moreover, the initial stage which makes the cullet member 51 fit with the inner cylinder member 41 by the difference of the outer diameter of the upper end of the cullet member 51, and the inner diameter of the lower end of the inner peripheral inclined surface 41b in the inner cylinder member 41. FIG. In the step, a large gap occurs in the radial direction. Therefore, the position at the time of raising the lower rim holding | maintenance mechanism 11 while making it possible to reliably fit the cullet member 51 to the inner cylinder member 41, without creating each member with high processing precision like the conventional one. Inadequate adjustment capability, or even a large ascending speed, allows the cullet member 51 to be fitted to the inner cylinder member 41 without reliably and damaging it.

By the centering mechanism 50 provided with the cullet member 51 and the press mechanism 52, in the inside of the inner cylinder member 41, when the above-mentioned centering operation | movement is performed, it is the axial center direction by the mechanical lock mechanism 30. The fixing operation is carried out. That is, when the upper end surface of the mechanical lock mechanism 30 contacts the horizontal tongue portion 41c, the uneven portion 32a of the hook member 32 opposes the uneven portion 41a of the inner cylinder member 41. As shown in FIG. 1, the inclined member 31 is raised by the rod elevating cylinder 23 via the rod member 24, and the hook member 32 is moved in the outer circumferential direction by the rising of the inclined member 31. By pushing in, the uneven part 32a of the claw member 32 is fitted to the uneven part 41a of the inner cylinder member 41. As a result, the upper spindle 4 and the lower spindle 5 are fixed in the axial direction by the mechanical lock mechanism 30, that is, the positional relationship in which the upper and lower spindles 4 and 5 are opposed to each other at a predetermined distance from each other. It is in a state of having.

Next, as shown in Fig. 4, the brake device 49 is turned off, the brake disc 48 is opened, and the clutch mechanism 47 is turned on, so that the spindle cylinder member 46 and the screw shaft The member 45 is connected in a fixed state. In addition, as shown in FIG. 1, the pressure air of predetermined pressure is supplied to the tire 1, and the tire 1 is in an inflation state.

When the tire 1 is in an inflation state, the reaction force of the tire 1 acts to peel the upper and lower rims 2 and 3 (up and down spindles 4 and 5). Therefore, if there is a loose portion in the axial direction between the upper and lower spindles 4 and 5, the lower rim supporting member 20 of the lower spindle 5 is lowered with respect to this loose portion so that both spindles 4 and 5 are separated. Will be. At this time, since the cullet member 51 provided on the lower rim support member 20 is urged upward by the pressing mechanism 52, even if the lower rim support member 20 is lowered, the cullet member 51 remains the inner cylinder member ( It stops at the pressed position in the inner peripheral inclined surface 41b of 41). Thereby, the centering function is maintained by pressing the cullet member 51 on the inner circumferential inclined surface 41b.

1, the upper spindle 4 and the lower spindle 5 are fixed to the axial direction by the mechanical lock mechanism 30. As shown in FIG. Therefore, even if the reaction force of the tire 1 is very large, the space | interval of the upper and lower spindles 4 and 5 does not peel more than the loose part. In addition, the mechanical lock mechanism 30 is used to fix the axial center direction of the upper and lower spindles 4 and 5, so that the lower spindle than the case where the upper and lower spindles 4 and 5 are fixed only by the hydraulic cylinder of the first lifting mechanism 12. The parts and mechanisms, such as the 1st lifting mechanism 12 which raises and presses (5), can be miniaturized.

Thereafter, the drum 102 is pressed against the tire 1 by a predetermined pressing force. In this case, the pressing force (lateral load) on the tire 1 by the drum 102 acts to push down the cullet member 51, or the cullet member 51 with a pressing force of the pressing mechanism 52 being pushed down. Since it is pulling up, the centering function by the cullet member 51 is maintained.

Next, as shown in Fig. 4, the spindle drive device 56 is operated to rotate the spindle cylinder member 46, so that the screw shaft member 45, the inner cylinder member 41, and the outer cylinder member 42 are rotated. . As a result, the lower spindle 5 including the lower rim support member 20 connected by the centering mechanism 50 and the mechanical lock mechanism 30 is rotated. As shown in Fig. 2, the tire 1 is rotated to rotate and vibrate the drum 102, thereby measuring the uniformity of the tire.

When the spindle cylinder member 46 is rotated as described above, this rotation is transmitted to the rotation detection mechanism 60 via the second belt 62. Thereby, as shown in FIG. 5, the 3rd pulley 70 connected to the 2nd belt 62 via the 2nd pulley 64 rotates, and the 1st rotation detector 74 rotates, and a spindle cylinder member ( The rotation speed (rotation angle) of 46 is output to a control device (not shown) as an angle detection signal.

In addition, the second gear 69 connected to the second belt 62 via the second pulley 64 also rotates to rotate the first bevel gear 76. At this time, since the screw shaft member 45 of FIG. 4 is rotated together with the spindle cylinder member 46 as described above, the screw shaft member 45 passes through the first belt 61 and the first pulley 63. The connected first gear 67 and the second bevel gear 79 are rotated at the same speed as the first bevel gear 76. Accordingly, as the planetary gear 80 receives the rotation of the first bevel gear 76 and the second bevel gear 79 and rotates at the same position, the shaft member 77 is in a stopped state. As a result, since the second rotation detector 84 remains in a stopped state, the origin detection signal is not output from the second rotation detector 84.

When the angle detection signal is output to the control device, the control device obtains the rotation speed or rotation speed of the tire 1 based on the angle detection signal, and specifies the measured relationship between the uniformity and the positional relationship between the tire 1. In addition, the control apparatus monitors the output state of the origin signal and notifies the operator that an abnormality has occurred in the clutch mechanism 47 or the like of FIG. 4 when the origin signal is input.

When the inspection of the tire 1 is completed as described above, as shown in FIG. 2, the operation opposite to the above-described operation is performed, and the tire 1 after the inspection is loaded by the lowering of the lower rim 3. The lower rim 3 is separated from the tire 1 while being loaded on the bases 86 and 86. And as shown in FIG. 3, the tire 1 before the inspection on the carrying-in roller 92 and the tire 1 after the inspection between the upper and lower rims 2 and 3 are respectively gripped by the holding mechanisms 90 and 90, The tire 1 before the inspection is moved and stacked between the upper and lower rims 2 and 3, and the tire 1 after the inspection is moved and stacked on the carrying out roller 93. Then, the inspection of the next tire 1 is repeated.

As described above, in the tire uniformity machine of the present embodiment, as illustrated in FIG. 1, the rim width of the upper and lower rims 2 and 3 when the upper and lower spindles 4 and 5 are connected to each other is determined by the tire 1. And a rim width adjustment mechanism 58 that can be changed to correspond to the bead width of the rim width adjustment mechanism 58. The rim width adjustment mechanism 58 is rotatably provided on the upper spindle 4 (first spindle). And an inner cylinder member 41 which is connectable to the lower spindle 5 (second spindle) and screwed to the screw shaft member 45 to move back and forth in the rim width direction by the rotation of the screw shaft member 45. It is composed with.

In addition, in this embodiment, as shown in FIG. 2, since the tire uniformity machine which horizontally arrange | positions the tire 1 and clamps it from top to bottom was demonstrated, for convenience of description, top and bottom spindles 4 and 5, and Although expressed as the upper and lower rims 2 and 3, it is not limited to this, It can apply to the tire uniformity machine which arrange | positions and inspects the tire 1 in arbitrary directions. Therefore, the upper and lower spindles 4 and 5 and the upper and lower rims 2 and 3 can be arranged in arbitrary directions, such as a horizontal direction, for example. In addition, in this embodiment, although the case where the lower spindle 5 is moved to the upper spindle 4 was demonstrated, it is not limited to this, If it moves at least one of the upper and lower spindles 4 and 5, do. In addition, the spindle movement mechanism may be comprised by one hydraulic cylinder 103, as shown in FIG.

According to the above structure, since the rim width adjustment mechanism 58 is provided in the upper spindle 4, compared with the case where rim width adjustment mechanisms, such as a hydraulic cylinder, are arrange | positioned below the lower spindle 5, for example. The rim width can be changed while suppressing the enlargement of the rotation direction of the upper and lower rims 2 and 3 of the tire 1 unity machine. Thereby, for example, when the tire 1 uniformity machine is introduced such that the rotation axis direction is in a state coinciding with the vertical direction, the pit 10 for accommodating the lower spindle 5 as shown in FIG. ) Can be made shallow, so that the cost required to introduce the equipment can be reduced. In addition, when the screw shaft member 45 is rotated, the inner cylinder member 41 is moved forward and backward to adjust the rim widths of the upper and lower rims 2 and 3, thereby simplifying the structure. In addition, since the rotation of the screw shaft member 45 can be easily controlled using a general detection sensor or a control apparatus, for example, if the bead width of the tire 1 is known in advance, the rim width is added to this bead width. It can be easily set automatically.

In addition, the rim width adjustment mechanism 58 in this embodiment is the outer cylinder member 42 with which the upper rim 2 was mounted, and the spindle drive which rotationally drives the outer cylinder member 42 as shown in FIG. The apparatus 56 and the clutch mechanism 47 which can switch the connection and disconnection of the outer cylinder member 42 and the screw shaft member 45 are comprised.

According to the above configuration, the pindle drive device 56 is used for adjusting the rim width of the spindle drive device 56 by switching the clutch mechanism 47 and for inspecting the tire 1 by rotating the rim. Can be combined.

In addition, in the rim width adjustment mechanism 58 in this embodiment, as shown in FIG. 1, the screw shaft member 45 and the inner cylinder member 41 are inserted in the outer cylinder member 42, and the inner cylinder member Key grooves 41e are formed in the rim width direction on the outer circumferential surface of 41, and guide cylinders 43 are fitted to the outer cylinder member 42 so as to be movable in the key grooves 41e. Thereby, the movement of the rim width direction of the inner cylinder member 41 by rotation of the screw shaft member 45 can be implement | achieved by a simple structure.

Moreover, the rim width adjustment mechanism 58 in this embodiment is the brake disk 48 and the brake apparatus 49 (brake mechanism) which can prohibit rotation of the screw shaft member 45 as shown in FIG. ) Is configured. Thereby, since the screw shaft member 45 can be stopped reliably, the rim width can be adjusted correctly.

Moreover, the tire uniformity machine in this embodiment detects the rotation state of the outer cylinder member 42 and the screw shaft member 45, respectively, and outputs the angle detection signal and the origin detection signal, and the rotation detection mechanism 60, And a control device (not shown) equipped with a function of monitoring the operation state based on each rotation state indicated by these signals. Thereby, the malfunction at the time of the rim width adjustment or the tire inspection can be detected.

As described above, according to the present invention, since the rim width adjusting mechanism is provided in one spindle, as compared with the case where the rim width adjusting mechanism is disposed outside the spindle, the enlargement of the rotation axis direction of the rim of the tire uniformity machine is suppressed. You can change the rim width. In addition, when the screw shaft member is rotated, the inner cylinder member can be moved forward and backward to adjust the rim width, thereby simplifying the structure. In addition, since the rotation of the screw shaft member can be easily controlled using a general detection sensor or a control device, for example, if the bead width of the tire is known in advance, the rim width can be easily set automatically to the bead width. It is effective.

Moreover, the tire uniformity machine of this embodiment is a pair of upper and lower spindles 4 with which the upper and lower rims 2 and 3 which hold the bead part of the tire 1 are mounted concentrically as shown in FIG. 5 and one lower spindle in the upper and lower spindles 4 and 5 to hold the bead portions of the tire 1 to the upper and lower rims 2 and 3 and to connect the upper and lower spindles 4 and 5 to each other. 5) When the spindle moving mechanism (the first elevating mechanism 12 and the second elevating mechanism 13) for moving the upper and lower spindles 4 and 5 are connected, the wedge is pressed by the pressing force of the upper and lower spindles 4 and 5. The centering mechanism 50 which matches the axial center of the lower spindle 5 with the axial center of the upper spindle 4 while exerting an action, and the tire are coupled so as to have an opposite positional relationship when the upper and lower spindles 4 and 5 are connected. It has the structure which has the mechanical lock mechanism 30 which produces the connection force against a tire internal pressure at the time of an inspection.

Specifically, the tires 1 are mounted on a pair of upper and lower spindles 4 and 5 on which the upper and lower rims 2 and 3 holding the bead portion of the tire 1 are mounted concentrically, and the upper and lower rims 2 and 3. The lower spindle so as to connect the upper and lower spindles 4 and 5 by inserting the convex connection parts installed in the lower spindle 5 into the concave connection parts installed in one upper spindle 4 at the same time. A spindle moving mechanism for moving the shaft (5) in the axial direction, and a cullet interposed in the gap so that a wedge action occurs in the gap formed in the spindle circumferential direction between both spindles when the upper and lower spindles 4 and 5 are connected to each other. Coupling portion provided on the inner circumference of the concave connection portion and the outer circumference of the convex connection portion such that the centering mechanism 50 having the member 51 (wedge sleeve) and the upper and lower spindles 4 and 5 are opposed to each other in a positional relationship. Has uneven portions 32a and uneven portions 41a, and The mechanical lock mechanism 30 which produces | generates the connection force against tire internal pressure at the time of a tire inspection by a sum is comprised.

According to the above configuration, since the centering mechanism 50 adjusts the shaft centers of both lower spindles 4 and 5 while exerting a wedge action with the pressing force acting on the upper and lower spindles 4 and 5, the upper and lower spindles 4 , 5) can be exerted a centering function of matching the shaft centers of the upper and lower spindles 4 and 5 with each other by the mechanical lock mechanism 30. This allows the spindle to be centered while being guided by a wedge-shaped sleeve, even if some deviation occurs in the shaft centers between the upper and lower spindles 4 and 5, for example, due to low machining precision or assembly precision of each part. The shaft centers of the upper and lower spindles 4 and 5 can be matched with each other without causing damage. Further, the pressing action by the pressing mechanism of the centering mechanism 50 or the elastic diameter reduction operation of the centering mechanism (curlet) acts as a cushion, so that the upper and lower spindles 4 and 5 can be moved and connected at high speed. As a result, the shift of the shaft center can be sufficiently prevented without requiring high processing accuracy, and the measured cycle time can be shortened.

In addition, the centering mechanism 50 in the present embodiment is inserted into the sliding side circumferential surface 20b of the lower spindle 5 so that the centering mechanism 50 is slidably inserted, and the upper spindle 4 The cullet member 51 is provided with a cullet member 51 which is a kind of a wedge-shaped sleeve whose outer circumferential surface 51a is inclined so that its outer diameter is reduced, and an inner circumferential direction with respect to the outer circumferential surface 51a of the cullet member 51. The inner circumferential inclined surface 41b formed on the upper spindle 4 is configured to be fitted with each other. In addition, the cullet member 51 may be provided in the upper spindle 4, and the inner peripheral inclined surface 41b may be provided in the lower spindle 5. In addition, the centering mechanism 50 may be provided so that the conical sleeve which is a wedge-shaped sleeve of the structure in which a slit is not formed instead of the cullet member 51 can be slidably fitted.

The centering mechanism 50 is formed by a wedge-shaped sleeve typified by a general cullet chuck method, and is large in the radial direction between the upper and lower spindles 4 and 5 when the cullet member 51 is fitted to the inner circumferential inclined surface 41b. Since the gap is formed, the spindle 45 can be connected at a high speed. Further, since the wedge-shaped sleeve is guided and centered along the inner circumferential inclined surface 41b, the cullet member 51 can be reliably fitted to the inner circumferential inclined surface 41b even if a large shift occurs in the axial center between the upper and lower spindles 4 and 5. have.

The centering mechanism 50 also has a pressing mechanism 52 for pressing the cullet member 51 (wedge sleeve) in the direction of the upper spindle 4, i.e., in the direction in which the wedge action by the cullet member 51 becomes stronger. It is composed. Thereby, even when the upper and lower spindles 4 and 5 in the connected state are slightly separated in the axial direction by the reaction force of the tire 1 or the like, the pressing mechanism 52 moves the cullet member 51 (wedge-shaped sleeve) to the upper spindle ( 4), the pressing force applied to the cullet member 51 (wedge-shaped sleeve) is maintained because the state of fit (wedge action) is maintained by moving in the direction. Thereby, the centering function of the connection initial stage can be maintained. In addition, the centering mechanism may be installed by sliding the wedge-shaped sleeve on the concave connecting portion side so as to be slidable. In that case, it is necessary to protrude the inclined surface corresponding to the inclined surface of the wedge-shaped inner periphery to the convex connection part side. Also in this case, the wedge-shaped sleeve can be pressed in the direction in which the wedge action becomes strong.

Although the locking mechanism 50 constitutes the engaging portion by the uneven portion 32a of the hook member 32 and the uneven portion 41a of the inner cylinder member 41, the lock mechanism 50 is not limited thereto, and the engaging portion has at least the uneven portion. What is necessary is just to have a site | part, and to couple | bond to another side by operating at least one of the said site | parts. For example, the portion having the uneven portion on the inner cylinder member side may be joined to the opposite uneven portion by operating to protrude toward the inner circumferential side. Further, for example, a plurality of hook portions are provided on the convex connecting portion side, and a hole portion through which the hooks of the convex connecting portion are inserted is provided on the concave connecting portion side, and at least one of both connecting members is rotated by a predetermined angle, thereby providing a The so-called Bionet lock may be used in which the hook portion is provided in the hole of the concave connecting portion so as to engage the hook portion.

As described above, according to the present invention, since the centering mechanism is elastically reduced in diameter by the pressing force in the inner circumferential direction of one spindle and adjusts the shaft center of the other spindle, the spindles function as a cushion when connecting the spindle to the lock mechanism. The centering function to match the shaft can be exhibited. Thereby, the shift | offset | difference of an axis center can be fully prevented without requiring a high processing precision, and the effect that the measured cycle time can be shortened is exhibited.

Claims (15)

A rim holding the bead of the tire, A rim width adjustment mechanism that can be changed to correspond to the bead width of the tire when the rim is concentrically mounted with the first and second pair of spindles and the rim width when the first and second spindles are connected to each other; under, Here, the rim width adjustment mechanism is connected to the screw shaft member rotatably provided on the first spindle and the second spindle to the screw shaft member to move back and forth in the rim width direction by the rotation of the screw shaft member. A tire uniformity machine comprising a threaded inner cylinder member. 2. The rim width adjusting mechanism according to claim 1, further comprising: an outer cylinder member on which the rim is mounted; A tire drive unit, comprising: a spindle drive for rotationally driving the outer cylinder member; and a clutch mechanism capable of switching connection and disconnection of the outer cylinder member and the screw shaft member. The screw shaft member and the inner cylinder member are inserted into the outer cylinder member according to claim 2, Key grooves are formed in the rim width direction on the outer circumferential surface of the inner cylinder member, And a guide key is fitted to the outer cylinder member so as to be movable to the key groove. The tire uniformity machine according to claim 2, wherein the rim width adjusting mechanism includes a brake mechanism capable of prohibiting rotation of the screw shaft member. The outer cylinder member rotation detection mechanism of claim 2, wherein the outer cylinder member rotation detection mechanism detects a rotational state of the outer cylinder member; The operation state is based on the rotational state detected by the screw shaft member rotation detection mechanism and the outer cylinder member rotation detection mechanism that detects the rotational state of the screw shaft member, and the rotational state detected by the screw shaft member rotation detection mechanism. A tire uniformity machine comprising a control device having a function of monitoring. A rim holding the bead of the tire, A first and second pair of spindles with rims mounted concentrically, A spindle movement mechanism for moving at least one side including the first spindle in the pair of spindles to hold each bead portion of the tire to the rim and to connect the pair of spindles together; When the spindles are connected to each other, the centering mechanism for matching the shaft center of the second spindle to the shaft center of the first spindle while the wedge action is exerted by the pressing force of both spindles and the positional relationship opposite to each other when the spindles are connected A tire uniformity machine, comprising: a locking mechanism that is coupled to generate a connection force against tire internal pressure during tire inspection. 7. The centering mechanism according to claim 6, wherein the centering mechanism has a cullet member whose outer circumferential surface is inclined so as to be inserted into the sliding side circumferential surface of the second spindle to reduce the outer diameter toward the first spindle, and with respect to the outer circumferential surface of the cullet member. A tire uniformity machine, wherein an inner circumferential inclined surface on which the cullet member can be fitted to impart a pressing force in the inner circumferential direction is formed on the first spindle. 8. The tire uniformity machine of claim 7, wherein the centering mechanism has a pressing mechanism for urging the cullet member in the direction of the first spindle. The said centering mechanism is a sliding side of the said collet member and said 2nd spindle when the said collet member is elastically reduced in diameter by the pressing force of the inner peripheral direction of the said 1st spindle, and the centering function is exhibited. A tire uniformity machine which presses with a pressing force greater than the frictional force with the surrounding surface. A rim holding the bead of the tire, A first and second pair of spindles with rims mounted concentrically, A concave connection portion provided on the first spindle, A convex connection part installed on the second spindle, At least one side of the pair of spindles is axially moved to hold each bead portion of the tire on the rim and to insert the convex coupling portion into the concave connection portion to connect the pair of spindles together. Spindle transfer mechanism and The pair of spindles and a centering mechanism having a wedge-shaped sleeve interposed in the gap so that a wedge action occurs in a gap formed in the direction around the spindle between the pair of spindles when the pair of spindles are connected to each other; And a locking mechanism provided with the concave connection portion and the convex connection portion so as to have a positional relationship opposed to each other, and having a locking mechanism for generating a connection force against tire internal pressure during tire inspection by the engagement of the coupling portion. Featured tire uniformity machine. 11. The tire uniformity machine of claim 10, wherein the wedge shaped sleeve of the centering mechanism is a cullet member. 11. The tire uniformity machine according to claim 10, wherein the centering mechanism has a pressing mechanism for pressing the wedge-shaped sleeve in a direction in which wedge action is intensified. 11. The tire uniformity machine according to claim 10, wherein the lock mechanism engages at least one of the portions at the same time as the engaging portion has a portion having at least an uneven portion. The tire uniformity machine according to claim 10, wherein the concave connection portion is constituted by a cylindrical member having a variable position in the axial direction with respect to the first spindle. The tire uniformity machine according to claim 14, wherein the cylindrical member is configured to be variable in position by a jack mechanism having a female screw provided to the cylindrical member and a male screw threaded thereto.