JP6172854B2 - Ladder equipment for vehicle packing box - Google Patents

Description

The present invention relates to a ladder device provided on the side of a packing box so that an operator can enter and leave the equipment storage box on the packing box of the vehicle.

In a work vehicle, an equipment storage box for storing various equipment such as a vinyl sheet and a work tool may be provided on a cab or a packing box. In this case, a ladder device is attached to the side surface of the cab or the packing box so that the worker can easily enter and leave the equipment storage box. As such a ladder device, those having various structures have been conventionally proposed (for example, see Patent Documents 1 and 2).
In Patent Document 1, a ladder body having brackets on the upper and lower sides of a cab, an upper link attached to an upper bracket, a lower link pivotally attached to a lower bracket, and a column and a step at one end of the upper link and the lower link. A ladder device that is pivotably mounted is disclosed. In this ladder device, a protrusion is provided on the other end of the lower link, and a stopper pin is provided on the lower bracket to prevent further downward rotation when the ladder body is rotated downward from the non-use position to the use position. I have to. By setting it to the use position, the distance between the ladder main body and the cab is set to a distance that makes it easy to put the operator's foot on the step.

In Patent Document 2, brackets are provided on the upper and lower sides of the cab, and the upper end of the ladder body is rotatably attached to the upper bracket, and the lower bracket and the lower end of the ladder body are connected using two links. A coupled ladder device is disclosed. In this ladder apparatus, the ladder main body is brought into a non-use position by folding two links, while the ladder main body is brought into a use position by making the two links straight. By using this position, as in Patent Document 1, the distance between the ladder main body and the cab is set to a distance that makes it easy to place the operator's foot on the step.
Moreover, in the said patent document 1 and patent document 2, the locking device for fixing a ladder main body in a non-use position between the upper-and-lower brackets in a cab is provided.

Japanese Utility Model Publication No. 48-080215 Japanese Utility Model Publication No. 48-080217

  In the conventional ladder apparatus having the structure as in Patent Document 1, each step of the ladder body is considerably above the normal position until the ladder body is moved from the non-use position to the use position. If it is possible to stop the motor in the middle of the use position, the workability becomes very poor. Therefore, it has been difficult to adjust the distance between the ladder main body and the cab at the use position according to the preference of the operator.

In addition, in the conventional ladder device having a structure as disclosed in Patent Document 2, the ladder body cannot be secured at the use position unless the two links are aligned. It is difficult to stop between the non-use position and the use position. Therefore, similarly to Patent Document 1, Patent Document 2 has a structure in which it is difficult to adjust the distance between the ladder body and the cab at the use position according to the preference of the operator.
Moreover, in the ladder apparatus of patent document 2, when returning a ladder main body from a use position to a non-use position, there exists a problem that an operator's finger | toe is easy to be caught there because two links are folded up vigorously. Furthermore, there is a possibility that the ladder body may damage the cab surface with the momentum of returning the ladder body to the non-use position.
Moreover, in the structure of the conventional patent document 1 and patent document 2, since the locking device was provided between the upper and lower brackets in the cab, it is necessary for the worker to raise his hand to the upper side in order to operate the locking device. The workability was bad.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle cargo box ladder device that is easy to adjust the distance between the ladder body and the vehicle cargo box, has good workability, and is safe.

  In order to achieve the above object, the first invention includes a ladder body in which an upper end portion is rotatably attached to a side upper end portion of a cargo box on a chassis, and a drawer mechanism provided on the lower side of the ladder body. The drawer mechanism is provided between a slide body having one end attached to a lower end portion of the ladder body and extending toward the cargo box, and a chassis frame extending in the front-rear direction of the chassis. A guide part that guides and supports the slide body, and a lock device that locks the slide body in a retracted state and a state where the slide body is pulled out from the stored state to a predetermined position. Has a buffer part for buffering the movement of the ladder body when returning to the stowed state from being pulled out together with the ladder body.

  According to the first invention, in the non-use position of the ladder body, the slide body can be stored in the space between the bottom wall of the cargo box and the chassis frame without being folded. In addition, when the ladder body is rotated from the non-use position to the use position, the ladder body rotates around the upper end of the packing box, so that the rotation angle is not large, and each step of the ladder body is upward. There is no significant movement. Furthermore, since the slide body is locked in a state where the slide body is pulled out from the housed state to a predetermined position, the moving direction of the slide body relative to the lock device is simple. Thereby, the distance adjustment between the ladder main body and the packing box at the use position can be performed only by setting the pull-out amount of the slide body and locking the slide body at the desired pull-out amount. As a result, it is possible to make the ladder device easy to adjust the distance between the ladder body and the packing box at the use position.

Further, since the lock device is provided on the lower side of the ladder body, the operator does not need to raise his hand upward when operating the lock, and the workability is good.
Further, there is no link that can be folded as in the prior art, and there is no possibility that a finger is caught in the link, which is safe.
Moreover, by having a buffer part, the momentum of the movement of a ladder main body from a use position to a non-use position is suppressed, and it is safe and can prevent the situation where the side of a packing box is damaged with momentum.

  According to a second invention, in the first invention, the buffer portion is attached to one of the guide portion and the ladder main body and an elastic buffer member, and is attached to the other side, and the buffer portion is in the storage state. A contact member that contacts the member, and the contact member is provided with a movement adjusting portion for moving the contact member along a direction of contacting the buffer member.

  According to the second aspect of the present invention, the distance between the ladder main body and the cargo box at the non-use position of the ladder main body can be easily adjusted by moving the contact member by the movement adjusting portion.

  In a third invention, in the first or second invention, the lock device includes a lock shaft that extends in the vehicle front-rear direction and is rotatable about an axis, and an operation lever attached to an end of the lock shaft. And a protrusion that protrudes from the peripheral surface of the lock shaft and rotates integrally with the lock shaft, and a lock hole that is provided on the slide body and into which the protrusion is inserted.

  According to the third aspect of the present invention, the ladder main body can be locked and released only by rotating the operation lever, so that workability is good. Further, if a plurality of lock holes of the slide body are provided at predetermined intervals, the distance adjustment between the ladder main body and the cargo box can be easily performed in a plurality of stages.

As described above, according to the present invention, the distance between the ladder main body and the packing box at the use position is adjusted only by setting the slide body pull-out amount and locking the slide body at the desired pull-out amount. Therefore, it is possible to make the ladder device easy to adjust the distance between the ladder main body and the packing box at the use position.
In addition, the operator does not need to raise his hand when operating the locking device, and the workability is good.
Moreover, by having a buffer part, the momentum of the movement of a ladder main body from a use position to a non-use position is suppressed, and it is safe and can prevent the situation where the side of a packing box is damaged with momentum.

It is a side view of a refuse collection vehicle provided with a ladder device concerning one embodiment of the present invention. It is AA principal part sectional drawing of FIG. It is the drawer mechanism of the ladder apparatus which concerns on one embodiment of this invention, and the principal part enlarged front view of the periphery. It is a drawer mechanism of a ladder device concerning one embodiment of the present invention, and the principal part expansion perspective view of the circumference. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a principal part enlarged view of the movement adjustment part of the ladder apparatus which concerns on one embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a garbage collection vehicle 1 on which a vehicle cargo box ladder device 10 according to an embodiment of the present invention is mounted. This garbage collection vehicle 1 has a cab 3 mounted on a chassis 2 and a dust storage box 4 as a vehicle cargo box.

An upper bulging portion 4a and a lower bulging portion 4b extending in the vehicle front-rear direction are formed on the upper side and the lower side of the side surface of the dust container box 4. These upper bulging portion 4 a and lower bulging portion 4 b serve as reinforcing stiffeners for the dust container 4.
On the dust storage box 4, an equipment storage box 40 is provided over the entire ceiling wall 4 c of the dust storage box 4.
The equipment storage box 40 is a shallow box for storing vinyl sheets and various work tools, and is formed by attaching a net member 43 to a plurality of support posts 41 and a frame member 42 which are a framework. The lower ends of the majority of the columns 41 extend further below the bottom of the mesh member 43 and are attached to the curved ceiling wall 4c of the dust container 4 as shown in FIG.
As shown in FIG. 1, a dust box 5 is connected to the rear opening 4 d of the dust container 4. A dust loading device 6 is provided inside the dust throwing box 5. The dust loading device 6 is for compressing dust loaded through the rear loading port 5 a of the dust loading box 5 and loading the dust into the dust container 4.

Here, as shown in FIGS. 2 to 4, the ladder device 10 according to the present embodiment includes a ladder main body 11 whose upper end is rotatably attached to a side upper end of the refuse storage box 4 on the chassis 2, and And a drawer mechanism 12 provided on the lower side of the ladder body 11.
The ladder main body 11 has a pair of support columns 13 made of circular tubes extending in the vertical direction, and a step 14 made of a plurality of circular tubes installed between the pair of support columns 13.
Each strut 13 is connected to the lower strut 13a extending linearly from the height of the lower bulging portion 4b of the dust container 4 to the height of the upper bulging portion 4a, and the upper end of the lower strut 13a. A middle support column 13b that is inclined and linearly extends to the dust storage box 4 side with respect to the lower support column 13a, is connected to the upper end of the middle support column 13b, and is substantially orthogonal to the lower support column 13a and linear to the dust storage box 4 side. And an upper column 13c extending in the direction.

A hinge mounting plate 15 is fixed to the end of the upper column 13c. The hinge mounting plate 15 is installed between the pair of upper support columns 13c.
One end of a pair of hinge portions 16 (see FIG. 1) is attached to the hinge attachment plate 15. The other ends of the pair of hinge portions 16 are attached to a hinge bracket 17 fixed to the dust container box 4.
The hinge bracket 17 is provided from the front of the dust container 4 and from the upper edge of the upper bulging portion 4a to the ceiling wall 4c.
In addition, a flat mounting piece 18 that protrudes toward the dust container 4 is fixed to the lower end of each lower column 13a.

Next, as shown in FIGS. 2 to 6, the drawer mechanism 12 includes a pair of slide bodies 121 having one end attached to the lower end portion of the ladder body 11 and extending toward the dust container box 4, and the dust container box 4. A guide portion 122 disposed in a space between the bottom wall 4e and the chassis frame 2a extending in the front-rear direction of the chassis 2 to guide and support the slide body 121, and the slide body 121 from the storage state and the storage state to a predetermined position And a locking device 130 that locks in the pulled-out state.
The slide body 121 is a square tube, and one end thereof is pivotally attached to the attachment piece 18. Further, a flange-like stopper portion 123 is attached to the other end portion of the slide body 121.
The guide part 122 has a box shape, and its upper end is attached to a side end part of the bottom wall 4 e of the dust container box 4. In other words, the guide portion 122 is attached so as to hang down from the side end portion of the bottom wall 4 e of the dust container 4.

The guide portion 122 is provided with a pair of guide hole portions 122 c that penetrate obliquely upward from the back side surface 122 a facing the chassis 2 toward the front side surface 122 b facing the ladder body 11.
The guide hole portion 122c has a rectangular shape, and the slide body 121 is inserted through the guide hole portion 122c. The guide hole 122c is formed so that the slide body 121 of the square tube can be slidably supported without rattling. When the slide body 121 is pulled out to the maximum side surface 122b side with respect to the guide hole portion 122c, the stopper portion 123 at the other end portion of the slide body 121 contacts the peripheral portion of the guide hole portion 122c on the back side surface 122a. It is like that.
Each surface of the guide portion 122 in the vehicle front-rear direction is constituted by a plate member, and this plate member projects downward from the lower end of the front side surface 122b of the guide portion 122 to form a shaft support portion 122e.

The lock device 130 extends in the vehicle front-rear direction and is rotatable about an axis, an operation lever 132 attached to one end of the lock shaft 131, and a lock shaft 130 protruding from the peripheral surface of the lock shaft 131 and locked. A protrusion 133 that rotates integrally with the shaft 131 and a lock hole 134 that is provided on the slide body 121 and into which the protrusion 133 is inserted.

Both ends of the lock shaft 131 are supported by a pair of shaft support portions 122e.
The operation lever 132 is for the operator to manually rotate the lock shaft 131, and is always urged by the spring member 135 in the direction in which the protrusion 133 rotates upward.
A pair of protrusions 133 are provided so as to protrude like a bowl from the peripheral surface of the lock shaft 131, and the positions thereof are set to face the lower surface of the slide body 121.
As shown in FIG. 6, two lock holes 134 are formed on the lower surface of the slide body 121. More specifically, the lock hole 134 includes a first lock hole 134a corresponding when the ladder body 11 is set to the non-use position, and a second lock hole 134b corresponding when the ladder body 11 is set to the use position. Have.

Specifically, a locking method by the lock device 130 will be described. As shown by the solid lines in FIGS. 5 and 6, the slide body 121 is stored in the unused position of the ladder body 11. At this time, the tip of the protrusion 133 of the lock device 130 is the first of the slide body 121. It fits in the lock hole 134a. Thereby, the movement of the slide body 121 and the ladder main body 11 is regulated.
Next, when the operator rotates the operation lever 132 with one hand against the urging force of the protrusion 133 in the direction D (downward) in FIG. 5, the protrusion 133 is also rotated in the same direction. The tip of the projection 133 is pulled out from the first lock hole 134a. Thereby, the slide body 121 can be pulled out.
Next, while maintaining the state in which the operation lever 132 is rotated in the D direction, when the operator rotates the ladder body 11 with the other hand and rotates the vehicle outward, the slide body 121 is pulled out. It is. Thereby, the slide body 121 and the ladder main body 11 are in the state of the two-dot chain line in FIGS. 5 and 6. At this time, the second lock hole 134b is located on the outer side of the vehicle with respect to the guide portion 122, and when the operation lever 132 is returned to the original direction (upward), the tip of the projection 133 is fitted into the second lock hole 134b. . Thereby, the movement of the slide body 121 and the ladder main body 11 in the use position of the ladder main body 11 is regulated.
In the present embodiment, there are two types of lock holes 134, the first lock hole 134a and the second lock hole 134b. However, if a plurality of lock holes 134 are added along the longitudinal direction of the slide body 121, the number of lock holes 134 increases. The movement of the slide body 121 can be regulated at the position. Thereby, the distance adjustment of the ladder main body 11 and the refuse storage box 4 can be easily performed in multiple steps.

In the present embodiment, the ladder device 10 includes a buffer portion 20 that cushions the movement of the ladder body 11 when the slide body 121 is returned from the state pulled out together with the ladder body 11 to the storage state.
As shown in FIGS. 4 to 7, the buffer portion 20 is attached to the guide portion 122 via the first mounting bracket 21 and is attached to the ladder body 11 via the second mounting bracket 23. And a contact member 24 that comes into contact with the buffer member 22 when the guide portion 122 is stored.

The first mounting bracket 21 is formed by bending a metal plate member. The first mounting bracket 21 protrudes from the front side surface 122b of the guide portion 122 toward the ladder main body 11, and an attachment surface 21a is formed at the end thereof. A buffer member 22 made of a rubber member and having a cylindrical shape is fixed to the mounting surface 21a with bolts and nuts.
The second mounting bracket 23 is a U-shaped member fixed to the mounting piece 18 so as to be a surface opposite to the surface facing the ladder body 11. The second mounting bracket 23 is formed with a through hole 23 a facing the buffer member 22.
The contact member 24 is made of metal and has a circular plate shape. As shown in FIGS. 3 and 7, the abutting member 24 is provided with a movement adjusting portion 30 for moving the abutting member 24 along the direction in which the abutting member 24 abuts. In addition, an adjustment bolt 31 erected at the center of the contact member 24 and a nut portion 32 fixed to the second mounting bracket 23 so as to be aligned with the center of the through hole 23a are provided.
The ladder main body in a state where the buffer member 22 and the contact member 24 are in contact with each other by rotating the contact member 24 and screwing the adjustment bolt 31 back and forth with respect to the nut portion 32 (direction F in FIG. 7). The distance between 11 and the dust container 4 can be adjusted.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.
In the above-described embodiment, the buffer member 22 is attached to the guide portion 122 and the contact member 24 is attached to the ladder body 11. However, the present invention is not limited thereto, and the contact member is attached to the guide portion and the ladder body is buffered. A member may be attached.
Moreover, in the said embodiment, although the slide body 121 was a square tube and the one end part was pivotally attached to the attachment piece 18, this invention is not limited to this. For example, the structure which adhered to the lower end part of the ladder main body as an arc plate-shaped member as a slide body may be sufficient.

As described above, the present invention is useful for the ladder device provided on the side of the packing box so that the worker can enter and leave the equipment storage box on the vehicle packing box in a work vehicle such as a garbage truck.

1 Garbage truck 2
2a Chassis frame 4 Garbage storage box (vehicle packing box)
DESCRIPTION OF SYMBOLS 10 Ladder apparatus 11 Ladder main body 12 Drawer mechanism 20 Buffer part 22 Buffer member
24 Contact member
30 Movement adjustment unit 121 Slide body 130 Lock device 131 Lock shaft 132 Operation lever 134 Lock hole

Claims (2)

A ladder main body whose upper end is rotatably attached to the upper side of the side of the cargo box on the chassis, and a drawer mechanism provided on the lower side of the ladder main body,
The drawer mechanism is provided in a space between a slide body having one end attached to a lower end portion of the ladder body and extending toward the cargo box, and a chassis frame extending in the front-rear direction of the chassis. A guide portion that is disposed and supports the slide body, and a lock device that locks the slide body in a retracted state and a state where the slide body is pulled out from the retracted state to a predetermined position;
Furthermore, have a buffer section for buffering the movement of the ladder body when the state where the slide body is drawn out together with the ladder body back into the retracted state,
The buffer portion is
An elastic buffer member attached to one of the guide part and the ladder body, and an abutting member attached to the other side and in contact with the buffer member in the housed state;
The vehicle luggage box ladder device, wherein the abutting member is provided with a movement adjusting unit for moving the abutting member along a direction in which the abutting member abuts . The vehicle luggage box ladder device according to claim 1 ,
The lock device includes a lock shaft that extends in the longitudinal direction of the vehicle and is rotatable about an axis, an operation lever that is attached to an end of the lock shaft, a protrusion that protrudes from a peripheral surface of the lock shaft, and the lock shaft. A vehicular luggage box ladder device comprising: a projecting portion that rotates integrally; and a lock hole that is provided in the slide body and into which the projecting portion is inserted .

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