JP4783419B2 - Retractable retaining plate device for paving machine - Google Patents

Description

  The present invention relates to a retractable retaining plate device in a paving machine, and more particularly to a retractable retaining plate device in a paving machine in which a retaining plate is disposed between a screw conveyor and a rear wheel. It is.

  FIG. 3 shows a conventional example of the asphalt finisher 1 as this kind of paving machine. As shown in the figure, a screed device 3 is connected to a rear portion of the machine body 2 via a leveling arm 4. Further, a hopper 5 is provided at the front portion of the machine body 2, and a paving material (asphalt mixture) in the hopper 5 is sent to the rear of the machine body 2 by a bar feeder (not shown) and dropped onto the road surface.

  A screw conveyor 6 is attached to the lower rear part of the machine body 2, and the screw conveyor 6 diffuses the pavement material that has fallen on the road surface in the width direction of the road. Further, a mold board 7 is disposed behind the screw conveyor 6. Thereby, the pavement material diffused by the screw conveyor 6 is leveled to a uniform height by the mold board 7 and then compacted by the screed device 3.

  Further, a pair of left and right telescoping screeds 3 b and 3 b are attached to the main screed 3 a of the screed device 3 so as to be slidable in the left-right width direction (machine width direction) of the machine body 2. When the expandable screeds 3b and 3b are expanded to the full width position outside the machine body width direction, the expansion screws 6a are connected to the left and right ends of the screw conveyor 6, and the retaining plates 8 are installed on the left and right sides of the rear part of the machine body 2. The front part of the expansion screw 6a is covered with the retaining plate 8 and partitioned. Thereby, the pavement material diffused by the screw conveyor 6 is smoothly fed to the left and right ends of the expansion screw 6a without being dissipated forward.

  As the retaining plate, a plate configured to be expandable in the body width direction is known. A conventional example of this type of retaining plate will be described with reference to FIGS. 4 and 5 show a state when the retaining plate is not attached to the airframe. In the figure, a pair of upper and lower pipes 12 and 12 are welded to a main body frame 11 fixed to the rear part of the machine body 10, and a retaining plate (see reference numeral 13 in FIG. 6) is attached to the pipes 12 and 12. The connecting rods 14 and 14 for holding are inserted. The connecting rods 14 and 14 are fastened and fixed to the pipes 12 and 12 by lock pins 15 and 15. When the retaining plate 13 is not attached, the connecting rods 14 and 14 are stored inside the main body frame 11. In addition, the code | symbol C in a figure shows the centerline of the body 10. FIG.

  FIG. 6 shows a state in which one retaining plate 13 is attached to the machine body 10. When mounting the retaining plate 13, the connecting rods 14, 14 are projected to the outside of the main body frame 11 (left side in FIG. 6) and fastened with lock pins 15, 15 to be fixed. Then, the upper and lower pipes 16, 16 fixed on the front surface side of the retaining plate 13 are inserted into the protruding portions of the connecting rods 14, 14 so as to be aligned with the axial centers of the connecting rods 14, 14, respectively. , 17 to fasten and fix. A rubber plate 18 is attached to the lower part of the retaining plate 13 with bolts or the like.

7 and 8 show a state in which the two retaining plates 13 and 13A are mounted on the airframe 10. FIG. When mounting the two retaining plates 13 and 13A, the lock pins 15, 15 and 17, 17 are loosened, and the connecting rods 14 and 14 are further protruded from the position of FIG. Tighten with pins 15 and 15 and fix. Then, the retaining plate 13A is further mounted and assembled to the protruding portions of the connecting rods 14 and 14 in the same manner as described above. In this case, the lock pins 17 and 17 fasten and fix the pipes 16A and 16A of the retaining plate 13A on the outside (left side in FIG. 7) (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 2004-300855 Japanese Utility Model Publication 57-6568

  In the above-described conventional technology, the number or size of the retaining plates can be changed and assembled according to the road width. However, every time the retaining plate is assembled, it is necessary to manually perform the position adjusting operation of the connecting rod, the attaching and detaching operation of the retaining plate to the connecting rod, and the tightening operation of the lock pin. Accordingly, there has been a problem in that a large amount of labor and time are required for the assembly work of the retaining plate, and the work efficiency is lowered. Further, when the retaining plate is not used, it is necessary to provide a storage place on a narrow body.

  Therefore, there is a technical problem to be solved in order to eliminate the work of assembling the retaining plate by hand and to save labor and increase the efficiency of the work, and the present invention aims to solve this problem. To do.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is characterized in that a screw conveyor is provided at the rear part of the machine body and a retainer is provided between the screw conveyor and the rear wheel. In the paving machine in which the finishing plate is disposed, the retaining plate is provided on the lower frame on the body side so as to be slidable in the body width direction, and between the lower frame and the retaining plate. A retractable retaining plate device for a paving machine is provided, wherein a hydraulic cylinder is interposed, and the retaining plate is configured to extend and contract in the body width direction by the hydraulic cylinder.

  According to this configuration, since the hydraulic cylinder is installed between the extendable retaining plate and the lower frame on the machine body, when the hydraulic cylinder is driven, the retaining plate expands and contracts in the machine body width direction. Therefore, the position adjustment of the retaining plate is mechanically driven by hydraulic pressure, and as a result, manual position adjustment work becomes unnecessary.

  The invention according to claim 2 is characterized in that the retaining plate is slidably fitted to and held by a pair of upper and lower guide members fixed to the lower frame. A retractable retaining plate device is provided.

  According to this configuration, the retaining plate is slidably fitted to the pair of upper and lower guide members. Therefore, when the retaining plate expands and contracts, the retaining plate is guided by the guide member and smoothly expands and contracts in the body width direction.

  According to the first aspect of the present invention, since the position adjustment of the retaining plate is automated by hydraulic drive, it is possible to omit the attaching and detaching operation of the retaining plate by hand, thereby saving labor and increasing the efficiency of the operation. it can. In addition, the retaining plate can be easily stored by simply mechanically shortening it when not in use.

  According to the second aspect of the present invention, since the retaining plate can be smoothly expanded and contracted in the width direction of the machine body by the pair of upper and lower guide members, in addition to the effect of the first aspect, the large retaining plate can be provided on an inclined road surface. Even when adjusting the amount of expansion / contraction of the retaining plate, the amount of expansion / contraction of the retaining plate can be adjusted accurately and stably.

  According to the present invention, a screw conveyor is provided at the rear of a machine body in order to achieve the object of saving labor and improving efficiency by eliminating the manual assembly work of the retaining plate. In the paving machine in which a retaining plate is disposed between the rear frame and the rear wheel, the retaining plate is provided on the lower frame on the body side so as to be slidable in the body width direction. A hydraulic cylinder is interposed between the retaining plate and the retaining plate is configured to extend and retract in the body width direction by the hydraulic cylinder.

  A preferred embodiment of the present invention will be described below with reference to FIGS. The present embodiment is applied to a paving machine of the same type as the asphalt finisher shown in FIG. 3, and the configuration other than the retaining plate device is basically the same as that of the asphalt finisher. That is, the asphalt finisher according to the present embodiment is provided with a hopper at the front of the fuselage, and the pavement material in the hopper is sent to the rear of the fuselage and dropped on the road surface, and then the screw conveyor attached to the rear of the fuselage It spreads in the width direction, and the spread pavement is leveled with a mold board and is compacted by a screed device.

  Also, in this embodiment, when pavement work is performed by extending a pair of left and right telescoping screeds attached to the main screed of the screed device to the full width position outside the body width direction, expansion screws are connected to the left and right ends of the screw conveyor. At the same time, the retaining plate is moved outward in the body width direction. Thereby, a retaining plate functions as a partition of a paving material in the front location of an expansion screw. Therefore, the pavement material diffused in the width direction of the road by the screw conveyor is smoothly sent to the left and right end positions of the expansion screw without being scattered forward.

  FIG. 1 is a side view of a retaining plate device according to the present embodiment, and FIG. 2 is a view taken along line AA in FIG. In the figure, reference numeral 21 denotes an airframe having a main frame 22, and a rear wheel 23 is attached to the rear portion of the airframe 21. Further, a lower surface plate 24 is fixed to the lower end of the rear end of the machine body 21, and a screw conveyor and a screed device (not shown) are provided behind the lower surface plate 24 (to the right in FIG. 1). Yes. A retaining plate device 25 is disposed between the screw conveyor and the rear wheel 23.

  As shown in FIG. 2, the retaining plate device 25 includes a pair of left and right retaining plates 26, 26 that can expand and contract in the body width direction (left-right direction LR in FIG. 2), and the retaining plates 26, 26 are hydraulic. The cylinders 27 and 27 are configured to be extended and contracted.

  Next, a specific example of the pair of left and right retaining plates 26 and 26 will be described in detail. Since the pair of left and right retaining plates 26 and 26 have the same structure, only the right retaining plate 26 will be described. The description of the left retaining plate 26 is omitted.

  The retaining plate 26 includes a vertical plate portion 26A and an inclined plate portion 26B connected to the upper portion of the vertical plate portion 26A. A rubber plate 26C is fixed to the lower side of the vertical plate portion 26A with bolts 28. ing. The inclined plate portion 26B is installed on a lower frame 29 on the side of the machine body 21 which is fixedly inclined to the lower portion of the lower surface plate 24.

  In the present embodiment, the inclined plate portion 26B of the retaining plate 26 is provided on the lower frame 29 so as to be slidable in the body width direction LR as shown in FIG. Specifically, the upper and lower edges of the inclined plate portion 26B are slidably fitted to a pair of upper and lower guide members 30, 31 fixed horizontally to the lower frame 29, as shown in FIG. Is held. In addition, if the cross-sectional shape of the guide members 30 and 31 is the structure which can guide the inclination board part 26B so that sliding is possible, it can form in L shape or a U shape.

  A hydraulic cylinder 27 is fixed to the lower frame 29 in the horizontal direction, and the hydraulic cylinder 27 has a rod 32 that expands and contracts in the body width direction LR.

  The distal end portion of the rod 32 is connected and fixed to the inclined plate portion 26B of the retaining plate 26 with a bolt or the like. Further, a hydraulic source and an oil tank (not shown) are connected to the hydraulic cylinder 27 via pipes 33 and 33 so that pressure oil is supplied to and discharged from the piston side oil chamber and the rod side oil chamber of the hydraulic cylinder 27. It is configured to be able to.

  Thus, when pressure oil is supplied to the piston-side oil chamber of the hydraulic cylinder 27, the rod 32 extends in the body width outward direction R. As a result, the inclined plate portion 26B is guided by the pair of upper and lower guide members 30 and 31, and slides in the body width outward direction R. For this reason, the retaining plate 26 extends and extends to the full width position.

  Thereafter, when pressure oil is supplied to the rod side oil chamber of the hydraulic cylinder 27, the rod 32 contracts in the body width inward direction L. For this reason, the retaining plate 26 contracts and retracts to the storage position.

  As described above, according to the present invention, the retaining plate 26 is provided on the lower frame 29 on the airframe 21 side so as to be slidable in the body width direction, and the hydraulic cylinder 27 is installed between the lower frame 29 and the retaining plate 26. Therefore, the retaining plate 26 is expanded and contracted in the body width direction by hydraulic drive.

  Therefore, the retaining plate 26 can be appropriately adjusted to an arbitrary expansion / contraction position according to the road width or the like. In this way, it is unnecessary to manually mount the retaining plate 26 and fix the position. Therefore, much labor and work time as in the conventional example can be omitted, and work efficiency and labor saving can be achieved as compared with the conventional example. Further, the retaining plate 26 can be easily stored by simply performing a mechanical shortening operation when not in use, and there is no need to provide a place for storing the retaining plate 26 on the machine body as in the conventional example.

  Further, when the retaining plate 26 expands and contracts, the upper edge portion and the lower edge portion of the inclined plate portion 26B of the retaining plate 26 are guided by the pair of upper and lower guide members 30, 31 and slide smoothly. Therefore, for example, even when the amount of expansion / contraction of the large retaining plate 26 is adjusted on an inclined road surface, accurate adjustment of the amount of expansion / contraction of the retaining plate 26 can be performed stably.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The side view of the retaining plate apparatus which showed one Example of this invention and was provided in the body rear end part. The AA arrow directional view of FIG. The perspective view of an asphalt finisher which shows a prior art example. It is a prior art example of a retaining plate apparatus, Comprising: The front view which shows the state before mounting | wearing with a retaining plate. The side view of FIG. It is a conventional example of a retaining plate apparatus, and is a front view which shows the state which mounted | wore with one retaining plate. It is a conventional example of a retaining plate apparatus, and is a front view which shows the state which mounted | wore the two retaining plates. The side view of FIG.

Explanation of symbols

21 Airframe 23 Rear wheel 25 Retaining plate device 26 Retaining plate 26A Vertical plate portion 26B Inclined plate portion 27 Hydraulic cylinder 29 Lower frame 30, 31 Guide member 32 Rod

Claims (2)

  In a paving machine in which a screw conveyor is provided at the rear part of the machine body and a retaining plate is disposed between the screw conveyor and the rear wheel, the retaining plate is mounted on the lower frame on the machine body side. A hydraulic cylinder is interposed between the lower frame and the retaining plate, and the retaining plate is configured to extend and contract in the body width direction by the hydraulic cylinder. A retractable retaining plate device for a paving machine.   2. The retractable retaining plate device in a paving machine according to claim 1, wherein the retaining plate is slidably fitted and held by a pair of upper and lower guide members fixed to the lower frame. .

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