JP5637973B2 - Folding leveling pointer device for paving machine - Google Patents

Description

  The present invention relates to a foldable leveling pointer device for a pavement machine, and more particularly to a foldable leveling pointer device for a pavement machine that reads a pavement thickness from a position where the leveling pointer moves.

  4 and 5 show an asphalt finisher 1 as an example of a conventional pavement machine. A hopper 3 for receiving a pavement material is provided at the front portion of the machine body 2, and the pavement material received by the hopper 3 is moved to the rear of the machine body 2. A conveyor (not shown) that conveys, a screw spreader 5 that spreads the pavement material conveyed by the conveyor in the left-right width direction of the machine body 2, and a stretchable screed 6 that is pulled at the rear of the machine body 2 and spreads the pavement material. I have.

  Further, the front end portion of the leveling arm (screed arm) 7 is pivotally attached to both the left and right sides of the machine body 2, and the rear end portion of the leveling arm 7 is connected to the left and right outer surfaces of the telescoping screed 6.

  Then, the front end pivoting portion 7 a of the leveling arm 7 is connected to one end portion of a leveling cylinder (hydraulic cylinder) 8, and the other end portion of the leveling cylinder 8 is attached to a substantially central portion in the front-rear direction of the body 2. The leveling cylinder 8 is disposed inside the left and right width (machine body width) of the machine body 2.

  Thereby, if the leveling cylinder 8 is expanded and contracted, the height of the front end pivoting portion 7a of the leveling arm 7 is changed, so that the height of the expandable screed 6, that is, the pavement thickness can be changed.

  Further, a leveling pointer device (pave thickness display device) 9 for detecting the amount of expansion / contraction of the leveling cylinder 8 and displaying the pavement thickness is known. The leveling pointer device 9 is installed in the vicinity of the leveling cylinder 8, that is, inside the left and right widths of the airframe 2 at the center upper portion of the airframe 2 (see Patent Documents 1 and 2).

  6 to 9 show a conventional example of the leveling pointer device 9. The leveling pointer device 9 is integrally attached to the connecting rod 8a of the leveling cylinder 8 with the lower end portion of the leveling pointer portion 11 attached to the front end pivoting portion 7a of the leveling arm 7 so as to be interlocked with the expansion and contraction operation of the leveling cylinder 8. A leveling scale portion 12 is disposed at a position corresponding to the upper end portion of the leveling pointer portion 11.

  The leveling scale portion 12 is fixed vertically on the airframe floor 13 which is the upper surface of the airframe 2. Further, the leveling scale portion 12 and the leveling indicator portion 11 are disposed inside the left and right width of the machine body 2.

  Therefore, when the leveling cylinder 8 expands and contracts, the leveling pointer portion 11 moves up and down integrally therewith. For this reason, the operator M can read the amount of expansion / contraction of the leveling cylinder 8, that is, the pavement thickness, by reading the display content of the leveling scale portion 12 instructed by the leveling pointer portion 11.

JP2003-253615A Japanese Patent No. 3673229

  As described above, in the leveling pointer device having the conventional structure, the leveling scale portion 12 and the leveling pointer portion 11 are arranged inside the body width. For this reason, as shown in FIG. 4, the operator M standing on the screed step 14 on the rear side of the telescoping screed 6 has a problem that it is difficult to visually recognize the display content of the leveling scale portion 12 indicated by the leveling pointer portion 11. It was.

  If the telescoping screed 6 is in the extended state, the operator M can stand at the outer end of the screed step 14 and visually recognize the leveling scale portion 12 from a position outside the body width. That is, the operator M can easily see the leveling scale portion 12 because the field of view is not obstructed by the hand-rubbing 15 or the like provided at the upper part of the side surface of the body 2. Therefore, in the extended state of the stretchable screed 6, there is usually no problem with the visual recognition of the leveling scale portion 12.

  In order to improve the visibility defect of the leveling scale part, it is conceivable to arrange the leveling scale part and the leveling indicator part on the outside of the body width. However, the leveling scale part and the leveling indicator part cannot be attached to the outside of the body width because of the inspection of the paving machine or transportation. Therefore, at present, the leveling scale part and the leveling pointer part are arranged at positions displaced outward of the body width as much as possible.

  In this way, even when the leveling graduation or the like is disposed at a position displaced to the outside of the machine body width, in the construction where the telescoping screed is moved to the most contracted state, the operator stands at the outer end of the screed step and the leveling indicator part Even when visually observing, etc., there was a problem that hand-rubbing provided in the vicinity of the outside of the machine body was in the way, and the leveling scale portion and the like could not be visually recognized.

  In other words, when the telescoping screed is in the fully contracted state, the operator's field of view is blocked by an object such as a hand rub, and the display content of the leveling scale portion cannot be visually recognized. Therefore, especially when performing construction in a narrow space that is almost the same as the width of the aircraft, the operator is obliged to perform pavement construction without confirming the display content of the leveling scale that is a guide for construction work. There was a problem.

  Therefore, even when the telescoping screed is in the most contracted state, a technical problem to be solved arises in order to make it possible to easily and reliably visually recognize the display content of the leveling scale portion. The purpose is to solve the problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is provided with a telescoping screed at the rear of the fuselage, and the front end of the leveling arm on the left and right sides of the fuselage via the leveling cylinder. In a paving machine which is configured to be able to change the height of the front end pivoting portion of the leveling arm by vertically extending and retracting the leveling cylinder, the front end pivot of the leveling arm is moved by the vertical movement of the pointer bar with respect to the leveling scale. A folding leveling pointer device showing a height position of a wearing portion, wherein the pointer bar is horizontally rotatable at an upper end portion of a rod provided so as to be vertically movable integrally with a front end pivoting portion of the leveling arm. The leveling scale portion is attached so that it can be opened and closed on the outer side and the inner side of the left and right width of the airframe, and the leveling scale portion. A long hole provided on the side portion engages the tip of the pointer bar so as to be slidable in the vertical direction, and the pointer bar is configured to rotate and move integrally with the opening / closing operation of the leveling scale portion. There is provided a folding leveling pointer device for a paving machine.

  According to this configuration, the leveling scale portion is provided so that it can be opened and closed on the outer side and the inner side of the left and right width of the aircraft, and the tip portion of the pointer bar is formed in the long hole provided on the leveling scale portion side. It is slidably engaged in the vertical direction. For this reason, when the leveling scale portion is opened to the outside of the body width, the pointer bar rotates and moves integrally with the opening operation of the leveling scale portion.

  Therefore, even when the telescoping screed is in the most contracted state, the display contents of the leveling scale portion can be easily visually recognized from the outside position of the machine body width without being obstructed by hand rubbing or the like.

  The invention according to claim 2 is characterized in that a locking mechanism is attached to the leveling scale part, and the locking mechanism has a lock pin that locks the leveling scale part in a folded position. A folding leveling pointer device for a paving machine is provided.

  According to this configuration, when the leveling scale portion is folded, the leveling scale portion is locked in the folded state by the lock pin of the locking mechanism. As a result, the leveling scale and the pointer bar do not have a risk of opening to the outside of the body width even if an unintended external force is applied thereto.

  According to a third aspect of the present invention, the leveling scale is attached to the body side member via a hinge with a spring, and the spring hinge is elastic in a direction to open the leveling scale to the outside of the body width. The folding leveling pointer device for a paving machine according to claim 2, wherein the folding leveling pointer device is provided.

  According to this configuration, when the leveling pointer device is used, the leveling scale portion is held open by the elastic force of the spring hinge. For this reason, even if the leveling scale part and the pointer bar collide with surrounding objects, the leveling scale part and the pointer bar are retracted in the closing direction, so there is no possibility of damage.

  According to the first aspect of the present invention, even when the telescoping screed is in the most contracted state during construction, the operator can visually recognize the display content of the leveling scale portion without obstructing the field of view by hand rubbing or the like. In particular, even when the work is performed in a narrow place that is almost the same as the width of the machine body, the display contents of the leveling scale portion can be easily and reliably visually observed to efficiently perform the pavement construction.

  In addition, by closing the leveling scale on the inside of the body width, the leveling scale and the pointer bar can be folded, so it is safe when the leveling pointer device is not used, such as when the vehicle is being transported. This is also very convenient from the viewpoint of the surface.

  According to the second aspect of the present invention, the leveling scale portion can be held in the folded state by the locking operation of the lock mechanism. In addition to the effect of the first aspect of the invention, the leveling scale portion and the pointer bar are unintentionally placed outside the vehicle body. Therefore, there is no possibility of colliding with an object outside the vehicle body.

  According to the third aspect of the present invention, when the leveling pointer device is used, the leveling scale portion and the pointer bar can be held open by the elastic force of the spring-equipped hinge. In this state, even if the leveling scale portion collides with an object, the leveling scale portion and the pointer bar automatically move in the closing direction. There is no risk of damaging the leveling scale and the pointer bar.

The front view which shows one Embodiment of this invention and demonstrates the structure of a folding type leveling pointer apparatus. The left view of FIG. FIG. 3 is a top view of the folding leveling pointer device of FIG. 2. The side view of an asphalt finisher which shows a prior art. The top view of the asphalt finisher of FIG. The side view of the leveling pointer apparatus which concerns on a prior art. The front view explaining the structure of the leveling scale part of the leveling pointer apparatus of FIG. The left view of FIG. The top view of the leveling pointer apparatus of FIG.

  In order to achieve the purpose of allowing the display contents of the leveling scale portion to be easily and reliably visually recognized even when the expansion and contraction screed is in the most contracted state, the present invention is provided with an expansion and contraction screed at the rear part of the aircraft, In a paving machine in which the front end of a leveling arm is pivotally attached to the left and right sides of the machine body via a leveling cylinder, and the height of the front end pivoting portion of the leveling arm can be changed by vertically extending and lowering the leveling cylinder. A folding leveling pointer device that indicates the height position of the front end pivoting portion of the leveling arm by the vertical movement of the pointer bar with respect to the scale portion, and the pointer bar moves up and down integrally with the front end pivoting portion of the leveling arm. The leveling scale is attached to the upper end of the rod, which can be rotated horizontally, and the leveling scale is outside the left and right width of the fuselage. The tip of the pointer bar is slidably engaged in a vertical direction in a long hole provided on the leveling scale portion side, and the pointer bar is connected to the leveling scale portion. This was realized by being configured to be able to rotate and move integrally with the opening / closing operation of the scale part.

  A preferred embodiment of the present invention will be described below with reference to FIGS. The configuration of the paving machine (asphalt finisher) to which the present invention is applied is basically the same as the asphalt finisher (1) shown in FIGS. 4 and 5 except for the leveling pointer device. In addition, the whole block diagram of the asphalt finisher according to the present embodiment is omitted.

  In other words, the asphalt finisher to which this embodiment is applied has a hopper that accepts pavement material at the front part of the aircraft, and stretch screed that spreads the pavement material at the rear part of the aircraft is pulled, and leveling on the left and right sides of the aircraft The front end of the arm is pivotally attached, and the rear end of the leveling arm is connected to the left and right outer surfaces of the telescoping screed.

  One end of the leveling cylinder is connected to a pivoting portion at the front end of the leveling arm, and the other end of the leveling cylinder is attached to the airframe. Further, the front end pivoting portion of the leveling arm is pivotally attached to one end portion of the leveling cylinder. When the leveling cylinder is extended and contracted, the height (pavement thickness) of the front end pivoting portion of the leveling arm is changed.

  The folding leveling pointer device according to the present embodiment is installed at the center position of the airframe, detects the amount of expansion / contraction of the leveling cylinder, and displays the pavement thickness. That is, as shown in FIG. 1, the folding leveling pointer device 30 is configured such that the pointer bar 32 moves up and down relative to the leveling scale portion 31 via the rod 33 in accordance with the expansion and contraction operation of the leveling cylinder. The height position (pavement thickness) of the front end pivoting portion of the leveling arm can be indicated.

  Specifically, the foldable leveling pointer device 30 includes a rod 33 extending in the vertical direction, and the rod 33 is provided so as to move up and down integrally with the front end pivot attachment portion of the leveling arm. A step portion is formed at the upper end portion of the rod 33, and a base end portion of the pointer bar 32 is detachably held by a screw or the like at the step portion.

  The pointer bar 32 is attached in a horizontal state perpendicular to the rod 33, and the proximal end portion of the pointer bar 32 is loosely fitted to the step portion on the upper end side of the rod 33 and held. For this reason, the pointer bar 32 can be freely rotated around the rod 33 in the horizontal state.

  The leveling scale portion 31 is disposed above the body floor 34. In the illustrated example, the leveling scale portion 31 is attached to a support member 35 erected on the machine body floor 34 via a plurality of hinges with springs (hereinafter referred to as “spring butterfly vanes”) 37 so as to be opened and closed.

  For this reason, the leveling scale portion 31 is configured to be freely rotatable around the vertical axis of the spring chow van 37. Therefore, by rotating the leveling scale 31, it can be freely opened / closed to the outside / inside of the body 38.

  During construction work, the operator M can keep the leveling scale 31 open by manually opening the leveling scale 31 to the outside of the machine body 38. The outer end portion of the leveling scale portion 31 is bent at a right angle in FIG. 2, that is, toward the rear side of the machine body 38, and a long hole 40 is formed in the bent portion 39.

  The long hole 40 extends in the vertical direction in parallel with the longitudinal direction of the bent portion 39. The length of the long hole 40 is set to be slightly longer than the vertical stroke of the rod 33 and the pointer bar 32 that move up and down integrally with the leveling cylinder.

  In the long hole 40 formed in the bent portion 39, the distal end portion of the pointer bar 32 in a horizontal state is slidably fitted and engaged. Accordingly, the pointer bar 32 is configured to be able to rotate and move integrally with the leveling scale portion 31 in accordance with the opening / closing operation of the leveling scale portion 31.

  And, when the leveling scale part 31 is opened outside the body width during construction, the leveling scale part 31 is rotated to the outside of the body width, so that the position in the open state indicated by the symbol OP in FIG. The leveling scale portion 31 is moved until. As a result, the leveling scale 31 is held in an open state by the action of the torque of the spring butterfly van 37.

  In the state in which the leveling scale portion 31 is open, even if an object collides with the leveling scale portion 31, the leveling scale portion 31 and the pointer bar 32 freely rotate integrally to the inside of the body 38. Since the retraction operation is performed, there is no possibility that the leveling scale portion 31 and the pointer bar 32 are damaged by the collision with the object.

  Further, when the leveling scale portion 31 is to be kept closed inside the body width in the asphalt finisher forwarding, the operator M manually closes the leveling scale portion 31, that is, the counterclockwise direction in FIG. 3. , The leveling scale 31 is moved to the closed position indicated by the symbol CL in FIG. As a result, the leveling scale 31 and the pointer bar 32 are folded to the closed position CL.

  As described above, when the leveling scale portion 31 is folded, the pointer bar 32 is also rotated together with the leveling scale portion 31 and folded inside the machine body 38. In this embodiment, as shown in FIGS. A lock mechanism 43 is attached to the back side of the portion 31. The lock mechanism 43 is configured such that the leveling scale portion 31 can be locked and held in a folded state by engaging a lock pin 44 with an engaged portion provided on the support member 35 side.

  For example, the lock mechanism 43 includes a lock pin 44 that can protrude to a lower lock position. In addition, a plate member 45 is disposed on the lower side corresponding to the lock pin 44, and an engaged portion (not shown) formed in the plate member 45 (lock hole, recess, or notch) includes: The lock pin 44 can be detachably engaged. The plate member 45 is fixed to the lower side of the support member 35 on the machine floor 34.

  Note that the lock mechanism 43 is not limited to the illustrated example, and may be any configuration as long as the leveling scale portion 31 can be locked and held in the folded state.

  In the present embodiment, the leveling scale 31 and the pointer bar 32 are rotated at the angle of about 80 degrees to 90 degrees from the open position OP in FIG. The lock pin 44 is locked.

  That is, by engaging the lock pin 44 with the engaged portion on the plate member 45 side, the leveling scale 31 and the pointer bar 32 are locked at the folding position inside the body width, that is, rotated / open / closed. It is held and fixed in an impossible state. Therefore, the leveling scale 31 and the pointer bar 32 in the folded state do not open outside the body width due to an unintended external force or the like.

  When the operator M manually releases the lock pin 44 of the lock mechanism 43 and opens the leveling scale portion 31, the lock pin 44 cannot be set to the locked state.

  On the contrary, when the leveling scale 31 is rotated from the closed position CL to the outside of the body width and moved to the open state, the pointer bar 32 rotates around the rod 33 together with this. The leveling scale 31 and the pointer bar 32 are set in an open state outside the body width.

  In this embodiment, the leveling scale portion 31 and the pointer bar 32 are positioned outside the body width by holding the leveling scale portion 31 at the open position OP during construction. Accordingly, when the operator M (see FIG. 4) standing at the screed step visually recognizes the leveling scale part 31, the field of view is not blocked by an object such as hand-rubbing, so that the display content of the leveling scale part 31 is surely displayed. It can be confirmed visually.

  As described above, according to the present invention, when the leveling scale portion is folded, the lock pin of the lock mechanism is engaged and locked with the engaged portion on the airframe side. In this locked state, the leveling scale portion and the pointer bar are restrained and held in a folded state, and therefore the leveling scale portion and the pointer bar cannot be opened outside the body width. Therefore, the leveling scale and the pointer bar do not unintentionally open to the outside of the vehicle body, and there is no possibility of colliding with an object outside the vehicle body.

  Further, when the leveling scale portion is opened to the outside of the body width, the pointer bar rotates and moves integrally with the opening operation of the leveling scale portion. Therefore, even when the telescoping screed is in its fully contracted state, the operator can visually check the display content of the leveling scale indicated by the pointer bar from a position outside the width of the machine body without being obstructed by hand rubbing or the like. Can do.

  Thus, even when the construction is performed in a narrow place that is substantially the same as the width of the machine body, the display contents of the leveling scale portion can be easily and surely visually checked and the pavement construction can be performed efficiently. In addition, by closing the leveling scale on the inside of the fuselage, the leveling scale and the pointer bar can be stored in a folded state, which is a safety feature when the folding leveling pointer device is not used, such as when the vehicle is being forwarded. This is also very convenient.

  Further, the leveling scale is always urged in the opening direction by the elastic force of the spring-loaded hinge. Thereby, at the time of use of a folding type leveling pointer apparatus, a leveling scale part and a pointer bar are stably hold | maintained in the open state. In this case, even if the leveling scale portion collides with an object in the open state, the leveling scale portion immediately retracts so as to close to the inside of the body width against the elastic force of the spring-equipped hinge. As a result, there is no possibility that the leveling scale part and the pointer bar are damaged by the collision.

  While specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Of course, the invention extends to such modifications.

  For example, in the embodiment, the leveling scale portion is configured to be able to rotate and open / close around the vertical axis via a spring-equipped hinge, but the main point is that the leveling scale portion can be opened and closed to the inside and outside of the body width. It is also possible to employ an opening / closing mechanism. Further, as a means for urging the leveling scale portion in the opening direction, a bullet urging means such as a rubber member may be adopted in addition to the spring.

  The present invention can also be applied to a paving machine in which the leveling pointer device is disposed at a position behind the front end portion of the airframe.

30 Folding type leveling pointer device 31 Leveling scale portion 32 Pointer bar 33 Rod 34 Airframe floor 35 Support member 37 Hinge with spring (Bullet force biasing means opening / closing connecting means)
38 Airframe 39 Bending part 40 Long hole 43 Lock mechanism 44 Lock pin 45 Plate member

Claims (3)

Equipped with telescoping screed at the rear of the aircraft, the front end of the leveling arm is pivotally attached to the left and right sides of the aircraft via the leveling cylinder, and the height of the pivoting front end of the leveling arm can be changed by the vertical expansion and contraction of the leveling cylinder In the paving machine configured in
A folding leveling pointer device showing the height position of the front end pivoting portion of the leveling arm by the vertical movement of the pointer bar with respect to the leveling scale portion,
The pointer bar is attached to an upper end portion of a rod provided so as to be vertically movable integrally with a front end pivoting portion of the leveling arm, and is attached to be horizontally rotatable.
The leveling scale part is provided so that it can be opened and closed outside and inside the left and right width of the fuselage, and the tip of the pointer bar is slidable in the vertical direction in the long hole provided on the leveling scale part side. A folding leveling pointer device for a paving machine, wherein the pointer bar is configured to rotate and move integrally with the opening / closing operation of the leveling scale portion.   2. The folding leveling pointer device for a pavement machine according to claim 1, wherein a locking mechanism is attached to the leveling scale portion, and the locking mechanism has a lock pin that locks the leveling scale portion in a folded position. . The leveling scale portion is attached to the body side member via a hinge with a spring, and the spring-loaded hinge elastically biases the leveling scale portion in a direction to open to the outside of the body width. The folding leveling pointer device for a paving machine according to claim 2, characterized in that: