JP6676797B2 - Lorry - Google Patents

Description

  The present invention relates to a truck capable of performing a dumping operation for inclining a packing box and a sliding operation for sliding a packing box in a state of being inclined rearward and in contact with a ground.

  2. Description of the Related Art Conventionally, there has been known a freight car capable of performing a dumping operation of tilting a packing box and a sliding operation of sliding the packing box down and sliding it backward to ground (for example, see Patent Document 1). This type of lorry can, for example, preferably carry both earth and sand and construction vehicles. At the time of transporting the earth and sand, the earth and sand can be discharged from the packing box to the ground by performing a dumping operation after reaching the destination. When transporting the construction vehicle, the rear part of the packing box can be grounded by performing a sliding operation. This facilitates the operation of loading the construction vehicle into the packing box and the operation of unloading the construction vehicle from the packing box.

  Such a lorry generally includes a slide frame rotatable with respect to a chassis frame, and a cargo box slidably supported by the slide frame. When performing the dumping operation, the slide frame is rotated while the packing box is fixed to the slide frame. When performing the sliding operation, the packing box is moved rearward, and the packing box is slid on the inclined slide frame to be grounded.

Japanese Patent No. 2581974

  In order to stabilize the vehicle body during the sliding operation, it is preferable that this type of truck has a jack for supporting the rear portion of the vehicle body on the ground. A truck needs a rear bumper, but if the rear bumper is fixed to the jack, the jack that supports the rear part of the vehicle body during sliding operation will also be used as a member that supports the rear bumper while the vehicle is running Can be.

  By the way, when the jack is fixed to the rear end of the slide frame, the slide frame rotates during the dumping operation, so that when the earth and sand is discharged from the packing box to the ground, the bumper moves downward. For this reason, for example, the bumper is likely to be in contact with the earth and sand, for example, the bumper is buried in the earth and sand, and is easily damaged. Therefore, it is preferable that the maintenance and replacement of the bumper be easy in a lorry capable of performing the dumping operation for tilting the packing box and the sliding operation for grounding the packing box.

  The present invention has been made in view of such a point, and an object thereof is to provide a truck capable of performing a dumping operation for tilting a packing box and a sliding operation for grounding the packing box, and which facilitates maintenance and replacement of a bumper. To provide.

  A lorry according to the present invention is provided with a slide frame rotatable with respect to a chassis frame, a cargo box slidably supported by the slide frame, and a rear end of the slide frame. A jack extending downward and a bumper fixed to the jack are provided, and the bumper is fixed to the jack by bolts.

  According to the above truck, since the bumper is fixed to the jack by the bolt, the bumper can be easily removed from the jack by removing the bolt. Further, by tightening the bolt, the bumper can be easily attached to the jack. As described above, according to the truck, the installation and removal of the bumper are easy, so that the maintenance and replacement of the bumper are easy.

  According to a preferred aspect of the present invention, the bumper has a bumper main body extending in a vehicle width direction, and a stay extending forward from the bumper main body, and the stay is formed with a plurality of vertically aligned bolt holes. Have been.

  According to the above aspect, the mounting position of the bumper with respect to the jack can be appropriately changed by selecting the bolt hole through which the bolt is inserted from the plurality of bolt holes arranged vertically. Therefore, the height position of the bumper can be adjusted.

  According to a preferred aspect of the present invention, when the bumper is fixed to the jack, the plurality of bolt holes include a bolt hole in which a bolt is inserted and a bolt hole in which a bolt is not inserted. I have.

  According to the above aspect, the height position of the bumper can be adjusted by appropriately selecting a bolt hole through which the bolt is inserted and a bolt hole through which the bolt is not inserted from among the plurality of bolt holes.

  According to a preferred aspect of the present invention, the stay is formed with two or more bolt holes vertically and two or more bolt holes horizontally.

  According to the above aspect, the bumper can be fixed to the jack using more bolts, and the mounting strength of the bumper can be increased. Further, the range of position adjustment of the bumper can be expanded.

  According to a preferred aspect of the present invention, the stay includes a front wall in which the bolt hole is formed, a left wall extending rearward from a portion of the front wall on the left side of the bolt hole, A right wall extending rearward from a portion on the right side of the bolt hole, and a rear wall spanned between the left wall and the right wall, the rear wall being behind the bolt hole of the front wall in the front wall. A hole is formed in the portion.

  According to the above aspect, since the stay has the front wall, the left wall, the right wall, and the rear wall, the rigidity is relatively high. Therefore, the mounting strength of the bumper can be increased. In addition, since a hole is formed in the rear wall, the work of attaching and removing the bolt can be easily performed through the hole.

  According to a preferred aspect of the present invention, the front wall has a first plate extending vertically and a second plate extending obliquely backward from a lower end of the first plate, and the bolt hole is It is formed on the first plate.

  According to the above aspect, the lower portion (the second plate) of the front wall is separated rearward from the jack. The lower end of the jack is a portion that comes into contact with the ground, but this portion can be prevented from interfering with the front wall of the stay.

  ADVANTAGE OF THE INVENTION According to this invention, the dumping operation | movement which inclines a packing box and the sliding operation | movement which grounds a packing box are possible, and the maintenance and replacement | exchange of a bumper can provide the lorry which is easy.

1 is a side view of a lorry according to an embodiment of the present invention. It is a side view at the time of dump operation of the above-mentioned truck. It is a side view at the time of the sliding operation of the said truck. It is a rear view of a part of the left rear part of the said truck. It is a rear view of the stay of a rear bumper. It is a front view of the said stay. It is a left view of a jack and a rear bumper. It is a side view at the time of the dump operation of the lorry concerning another embodiment. It is a side view at the time of slide operation of the lorry concerning another embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a lorry 1 according to the present embodiment. FIG. 2 is a side view of the truck 1 during a dumping operation, and FIG. 3 is a side view of the truck 1 during a sliding operation. The lorry 1 includes a chassis frame 10, a cab 2 supported by the chassis frame 10, a subframe 20 disposed behind the cab 2 and on the chassis frame 10, and a hinge shaft 5 extending in the vehicle width direction. The slide frame 30 includes a slide frame 30 rotatably supported by a rear end of the frame 20 and a packing box 40 slidably supported by the slide frame 30. The front wheel 3 and the rear wheel 4 are supported by the chassis frame 10. A driver seat (not shown) is provided inside the cab 2. In the following description, the terms front, rear, left, right, top, and bottom mean front, rear, left, right, top, and bottom, respectively, as viewed from the driver sitting in the driver's seat, unless otherwise specified. And

  In addition, the lorry 1 of this embodiment is provided with the sub-frame 20 on the chassis frame 10, and the sub-frame 20 is connected to the slide frame 30 that slidably supports the packing box 40. However, the truck 1 does not have to include the subframe 20. As shown in FIGS. 8 and 9, the slide frame 30 may be rotatably connected to the chassis frame 10 via the dump hinge 5. The lorry 1 may have a configuration disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-230653.

  As shown in FIG. 2, the truck 1 is capable of performing a dumping operation in which the cargo box 40 is inclined. The sub frame 20 and the slide frame 30 are connected by a hoist mechanism 50. The hoist mechanism 50 has a lift arm 52, a tension link 53, and a hydraulic cylinder 51. When the hydraulic cylinder 51 is contracted, the slide frame 30 is in a horizontal state as shown in FIG. 1, and the packing box 40 maintains a horizontal posture. On the other hand, as shown in FIG. 2, when the hydraulic cylinder 51 is extended, the front part of the slide frame 30 is lifted, and the slide frame 30 is tilted by rotating around the hinge shaft 5. As a result, the packing box 40 is inclined backward and downward. In the present embodiment, the hydraulic cylinder 51 constitutes a dump actuator that inclines the slide frame 30 and the packing box 40. Although not shown, the lorry 1 includes a lock mechanism that locks the packing box 40 so as not to slide on the slide frame 30. During the dumping operation, the lock mechanism is turned on, and the packing box 40 is prevented from sliding.

  As shown in FIG. 3, the lorry 1 is capable of performing a sliding operation in which the cargo box 40 is slid backward in an inclined state. In FIG. 3, the illustration of the hoist mechanism 50 (see FIG. 2) is omitted. Although not shown, the lorry 1 is provided with another hydraulic cylinder as a slide actuator for sliding the cargo box 40 back and forth. One end of the hydraulic cylinder is connected to the slide frame 30 and the other end is connected to the packing box 40. When sliding the packing box 40 backward, the slide frame 30 is inclined by the hoist mechanism 50. During the sliding operation, the lock mechanism is turned off, and the packing box 40 can be slid with respect to the slide frame 30. Then, the packing box 40 is slid rearward along the slide frame 30 by extending the hydraulic cylinder. At the rear end of the packing box 40, a tail panel 41 that comes into contact with the ground during the sliding operation is provided.

  The jack 15 is provided at the rear end of the slide frame 30. The jack 15 extends downward from the rear end of the slide frame 30. As shown in FIG. 3, during the sliding operation, the jack 15 contacts the ground and plays a role of supporting the lorry 1.

  As shown in FIG. 1, a bumper 25 is attached to the jack 15. FIG. 4 is a rear view of a part of the left rear portion of the lorry 1. As shown in FIGS. 1 and 4, the bumper 25 has a bumper body 26 extending in the vehicle width direction, and a stay 27 extending forward from the bumper body 26. A pair of stays 27 are provided on the left and right. However, the number of stays 27 is not limited to two. In the present embodiment, the bumper main body 26 is welded to the stay 27. The bumper 25 has a welded portion connecting the bumper main body 26 and the stay 27. Reference numeral 38 in FIG. 4 indicates a tail light.

  FIGS. 5, 6, and 7 are a rear view, a front view, and a left side view of the stay 27, respectively. The stay 27 includes a front wall 29 in which a bolt hole 28 is formed, a left wall 31 extending rearward from a portion of the front wall 29 on the left side of the bolt hole 28, and a right wall of the front wall 29 which is on the right side of the bolt hole 28. It has a right wall 32 extending rearward from the portion, and a rear wall 33 spanned between the left wall 31 and the right wall 32. The stay 27 has a front wall 29, a left wall 31, a right wall 32, and an upper wall 34 provided above the rear wall 33. In the present embodiment, the left wall 31, the rear wall 33, and the right wall 32 are integrally formed, and are formed by bending a first plate material. Further, the front wall 29 and the upper wall 34 are formed integrally, and are formed by bending the second plate material. The first plate and the second plate are welded. However, the above configuration is only an example, and is not limited at all.

  As shown in FIG. 7, the front wall 29 has a first plate 29A extending vertically and a second plate 29B extending obliquely downward from the lower end of the first plate 29A. The bolt holes 28 are formed in the first plate 29A.

  Although the number of the bolt holes 28 is not particularly limited, it is preferable that two or more bolt holes are provided vertically and two or more bolts are provided left and right. In the present embodiment, as shown in FIG. 6, three bolt holes 28 are formed on the upper and lower sides and two bolt holes 28 are formed on the left and right sides. A total of six bolt holes 28 are formed. The dimensions of these six bolt holes 28 are the same. As shown in FIG. 5, a hole 35 is formed in a portion of the rear wall 33 behind the bolt hole 28 of the front wall 29. Through this hole 35, the bolt 45 can be inserted into the bolt hole 28 and tightened. The bolt 45 can be removed from the bolt hole 28 through the hole 35.

  In the lorry 1, when the earth and sand are transported, the earth and sand can be discharged from the cargo box 40 to the ground by performing a dumping operation after reaching the destination (see FIG. 2). At this time, the bumper 25 may move downward and be buried in earth and sand. In the truck 1 according to the present embodiment, the bumper 25 is likely to be in contact with the earth and sand, so that the bumper 25 is more likely to be damaged than a truck in which the bumper does not move.

  However, in the truck 1 according to the present embodiment, the bumper 25 is fixed to the jack 15 by the bolt 45. Therefore, the bumper 25 can be easily removed from the jack 15 by removing the bolt 45. Further, by tightening the bolt 45, the bumper 25 can be easily attached to the jack 15. As described above, according to the lorry 1 according to the present embodiment, the mounting and dismounting of the bumper 25 are easy, so that when the bumper 25 is damaged, maintenance or replacement can be easily performed.

  According to the truck 1 of the present embodiment, the stay 27 has a plurality of bolt holes 28 arranged vertically. The mounting position of the bumper 25 with respect to the jack 15 can be appropriately changed by selecting the bolt hole 28 through which the bolt 45 is inserted from among the plurality of bolt holes 28 arranged vertically. Therefore, according to the truck 1 according to the present embodiment, the height position of the bumper 25 can be adjusted.

  In the present embodiment, the stay 27 is formed with three bolt holes 28 vertically and two bolt holes 28 horizontally. Of these six bolt holes 28, bolts 45 are inserted into a total of four bolt holes 28, two vertically and two horizontally. As shown in FIG. 7, when the bumper 25 is fixed to the jack 15, the bolt holes 28 are the bolt holes 28 through which the bolts 45 are inserted (the second and third bolt holes 28 from the top in FIG. 7). And a bolt hole 28 through which the bolt 45 is not inserted (the first bolt hole 28 from the top in FIG. 7). In the present embodiment, the lower four bolt holes 28 are selected as the bolt holes 28 into which the bolts 45 are inserted. Thereby, the height position of the bumper 25 is set higher. The stay 27 is fixed to the jack 15 by a total of four bolts 45. Therefore, the mounting strength of the bumper 25 can be increased. In addition, the number of the bolt holes 28 is not particularly limited. For example, four or more bolt holes 28 may be provided vertically. Thereby, the number of selectable bolt holes 28 can be increased, and the range of position adjustment of bumper 25 can be expanded.

  According to the present embodiment, since the stay 27 has the front wall 29, the left wall 31, the right wall 32, and the rear wall 33, the stay 27 has relatively high rigidity. Therefore, the mounting strength of the bumper 25 can be increased. Further, since the hole 35 is formed in the rear wall 33, the work of attaching and detaching the bolt 45 can be easily performed through the hole 35. It is possible to simultaneously improve the mounting strength of the bumper 25 and facilitate the work of mounting and removing the bumper 25.

  According to the present embodiment, as shown in FIG. 7, the front wall 29 has a first plate 29A extending vertically and a second plate 29B extending obliquely backward from the lower end of the first plate 29A. ing. The second plate 29B, which is the lower part of the front wall 29, is separated from the jack 15 rearward. The lower end of the jack 15 is a portion that comes into contact with the ground, but this portion can be prevented from interfering with the front wall 29 of the stay 27.

  As mentioned above, although one embodiment of the present invention was described, the above-mentioned embodiment is only an example. Of course, the present invention is not limited to the above embodiment. For example, the truck 1 may perform a dumping operation using the hoist mechanism 50 shown in FIG. As shown in FIG. 9, when the cargo box 40 is moved rearward by the slide cylinder, the cargo car 1 is inclined by its own weight with the movement of the center of gravity rearward, and the cargo box 40 slides and is grounded. There may be. In addition, it can be implemented in various forms.

  DESCRIPTION OF SYMBOLS 1 ... Truck, 10 ... Chassis frame, 15 ... Jack, 25 ... Bumper, 26 ... Bumper main body, 27 ... Stay, 28 ... Bolt hole, 29 ... Front wall, 29A ... 1st plate, 29B ... 2nd plate, 30 ... Slide frame, 31 ... Left wall, 32 ... Right wall, 33 ... Rear wall, 35 ... Hole, 40 ... Packing box, 45 ... Bolt

Claims (10)

A slide frame rotatable around a hinge axis with respect to the chassis frame,
A packing box slidably supported by the slide frame,
A jack provided at a rear end of the slide frame and extending downward from the slide frame;
And a bumper fixed to the jack,
The jack is located behind the hinge axis when the slide frame is in a horizontal state,
The bumper includes a bumper main body extending in a vehicle width direction, and a stay extending forward from the bumper main body.
The stay extends downward from Rutotomoni the jack is bolted to the jack,
A lorry, wherein the bumper body is provided at a lower end of the stay .   The truck according to claim 1, wherein the bolt is arranged so as to be visible from behind.   The truck according to claim 1 or 2, wherein the bolt is configured to be tightened or removed from the rear. The truck according to any one of claims 1 to 3, wherein the stay has a plurality of vertically arranged bolt holes.   The truck according to claim 4, wherein the stay is formed by bending a plate material.   The truck according to claim 4 or 5, wherein a lower portion of the stay is further away from the jack as it goes downward. The plurality of bolt holes, when the stay is fixed to the jack, includes a bolt hole through which a bolt is inserted and a bolt hole through which a bolt is not inserted. The lorry described in one.   The truck according to any one of claims 4 to 7, wherein the stay has two or more bolt holes formed vertically and two or more bolt holes formed right and left. The stay includes a front wall in which the bolt hole is formed, a left wall extending rearward from a portion of the front wall on the left side of the bolt hole, and a right wall portion of the front wall from the bolt hole. A right wall extending rearward, and a rear wall spanned over the left wall and the right wall,
The truck according to any one of claims 4 to 8, wherein a hole is formed in a portion of the rear wall behind the bolt hole of the front wall. A slide frame rotatable with respect to the chassis frame,
A packing box slidably supported by the slide frame,
A jack provided at a rear end of the slide frame and extending downward from the slide frame;
And a bumper fixed to the jack,
The bumper is fixed to the jack by a bolt,
The bumper includes a bumper main body extending in a vehicle width direction, and a stay extending forward from the bumper main body.
In the stay, a plurality of bolt holes arranged vertically are formed,
The stay includes a front wall in which the bolt hole is formed, a left wall extending rearward from a portion of the front wall on the left side of the bolt hole, and a right wall portion of the front wall from the bolt hole. A right wall extending rearward, and a rear wall spanned over the left wall and the right wall,
A hole is formed in a portion of the rear wall behind the bolt hole of the front wall,
The front wall includes a first plate extending vertically, and a second plate extending obliquely backward from a lower end of the first plate,
The bolt hole is formed in the first plate, lorry.

Images