JP2573139Y2 - Truck lift equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift device for a lorry, and more particularly to a lift device for a lorry that automatically expands a lift table in conjunction with a lowering operation of the lift table.

[0002]

2. Description of the Related Art Conventionally, this type of lifting apparatus stores a lift table as parallel to the floor as possible, because it is necessary to store the folded lift table in a limited space below the floor. I was By storing the lift table parallel to the floor in this way,
The lift table can be stored compactly under the floor, but when the lift table in the stored state is lowered and deployed, it is necessary to manually lift and rotate the lift table stored horizontally under the floor. In addition, the work of raising the lift table was a heavy labor, since the lift table was stored under the floor, and the operator had to lift it from an unreasonable posture.

In order to solve such a problem, Japanese Utility Model Laid-Open Publication No. 57-150038 discloses that a lift table is stored in an upright state behind a packing box, and the lift table is lowered when used. 2. Description of the Related Art A folding device for a vehicle lifter configured to be deployed by a hydraulic cylinder has been proposed.

[0004]

SUMMARY OF THE INVENTION In the above conventional example,
Although the lift table folded in half by the hydraulic cylinder can be unfolded and folded as well, the structure is complicated because the hydraulic cylinder is used, and a hydraulic circuit for controlling the hydraulic cylinder is also required. This leads to an increase in cost. Furthermore, since the conventional lift device is stored in an upright state so as to close the loading / unloading entrance behind the packing box when the lifting table is stored, the lift table must be lowered every time when loading / unloading the packing box. In addition, even when loading / unloading small luggage that does not require a lift table, the lift table must act as a hindrance to the lift table, which is not only inefficient, but also difficult to operate. .

Therefore, the present invention has been made based on such a problem, and in a lift device stored under the floor, the lift table is automatically moved in the lift table unfolding direction by mechanical means having a simple structure. It is an object of the present invention to provide a lorry lift device capable of tilting.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a truck in which a lift table which can be deployed and folded on a packing box is provided so as to be movable up and down, and the lift table is folded and stored substantially horizontally below the floor of the packing box. In the lift device, a table raising mechanism that raises the lift table in the horizontal storage state in conjunction with the lowering operation of the lift table, and a table that is detachably provided to the lift table and has a small number of biasing members.
At least a grounding member that protrudes downward from the lift table in the upright state and tilts the lift table in the upright state, and a lock release mechanism that releases the engagement between the ground member and the lift table when the lift table is in the grounded and unfolded state It is provided.

[0007]

According to the present invention, when the lift table in the horizontal storage state is lowered by the above configuration, the lift table is rotated from the horizontal state to the standing state by the table raising mechanism during the lowering, and the lift table is grounded. In the meantime, the lift table is rotated by the grounding member that comes in contact with the lift table before the lift table by the urging member, and the lift table that rises by the table rising mechanism is automatically tilted in the developing direction. When the lift table is deployed, the engagement between the lift table and the ground member is released by the lock release mechanism. When the lift table is used, when the lift table is raised and the lift table is again grounded, the lift member is lifted by the ground member. The table is not rotated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 6 show a first embodiment of the present invention. An aluminum van type packing box 2 fixed on a truck frame 1 of a lorry has a rear surface opened to open a luggage entrance 3.
This is a well-known packing box structure in which the entrance 3 is opened and closed by a double door type opening / closing door 4 attached to the rear end of each of the left and right side walls of the packing box 2. A lift table 5 is provided behind the packing box 2. The lift table 5 includes a front table 6 and a rear table 7, and then the lift table 5 is grounded to the rear end of the table 7. At this time, an inclined plate 8 is provided to eliminate a step between the rear table 7 and the grounding surface and to facilitate entry of a bogie or the like.
The tables 6 and 7 and the inclined plate 8 are connected so as to be able to be folded and unfolded by pivotally connecting the ends of the inclined plate 8 to each other by a pivot 9. A pair of left and right elevating posts 10 are erected on both sides of the front side of the front table 6. The elevating posts 10 and the front table 6 are pivotally connected by a pivot 10A. Further rotation of the front table 6 in a horizontal state is restricted by a stopper mechanism (not shown) with respect to the front table 6. That is, when the front table 6 is deployed behind the packing box 2, the front table 6 is held vertically with respect to the lifting post 10.

On both sides of the inner surface of the entrance 3 of the packing box 2,
A hollow rectangular tubular guide post 11 for guiding each lifting post 10 is formed, and the lower end of the guide post 11 is located inside the chassis frame 1 and extends below the floor surface 2A. A vertical groove 12 is provided at the lower end of each guide
Are formed to be opened inward. A plurality of guide rollers 13 rolling along the elevating posts 10 are rotatably supported in the guide posts 11, and the elevating posts 10 guided by the guide posts 11 by the guide rollers 13. The lifting post 10 that is guided stably in this way is connected to the piston rod 15 of the hydraulic cylinder 14 provided at the upper part of the guide column 11 and suspended, and lifted by the operation of the hydraulic cylinder 14 It is configured to be.
On the front side of the rear table 7, a pair of left and right guide rollers 16 project sideways from both sides of the rear table 8 and are rotatably supported. A pair of left and right guide rails 17 for receiving 16 are provided horizontally. This guide rail 17 is a side plate 18
When made from the upper guide plate 21 for extending the lateral opening 20 following the guide rail 17 to be substantially horizontal lower guide plate 19 and the rear side upwardly inclined allowed by the receiving port of the guide roller 16, the front tape over
Upon Mawarido the lift table 5 the packing box side a pivot 10A as a fulcrum in a folded rear table 7 on table 6, the rear Te
The rear opening 20 of the guide rail 17 is formed so as to face the rotation locus of the guide roller 16 provided on the cable 7. The guide roller 16 and the guide rail 17 constitute a table elevating mechanism 22 of the lift table 5. When the lift table 5 is stored, the guide roller 16 and the guide rail 17 engage with the lift table 5 in conjunction with the lift. When the lift table 5 is guided horizontally along the floor surface 2A, and when the lift table 5 is lowered, on the contrary, the lift table 5 in the horizontal storage state may stand up with a slight inclination toward the packing box 2 side. It is guided to. A ground member 25 is attached to the lift table 5 by pivotally connecting the ends of two link arms 23, 23A having different lengths by a shaft 24. The base end of the short link arm 23 Are positioned on both sides of the front end of the front table 6 and are pivotally supported by the pivot 10A. On the base end side of the long link arm 23A, an engagement roller 26 is pivotably supported by the rotation. The front table 6 is engaged with engagement grooves 27 provided on both sides of the front end. This engagement groove 27 is formed longer than the engagement groove 27 via a continuous groove 28, and
A relief groove 29 is formed in parallel with the engagement groove 27, and the continuous groove 28 and the relief groove 29 constitute a lock release mechanism. Integrally provided the link at the base end side of the arm 23 via said wait 30 connecting arm 31 as a biasing member for lifting tables five et protrude below the respective link arms 23,23A upright I have.

A shock absorber 32 is provided substantially at the center of the rear surface of the front table 6, and the base of the shock absorber 32 is pivotally attached to a mounting bracket 33 provided integrally with the pivot 10A. The provided shaft 34 is movably inserted into a long hole 35 formed in the front table 6 to connect the front table 6 and the pivot 10A. In this case, the shaft 34 provided at the rod tip rolls along the elongated hole 35 while the front table 6 is in the standing state from the horizontal storage state by the table rising mechanism 5 and the grounding member 25, and thereafter, The shaft 34 is locked to the end of the elongated hole 35 until the front table 6 in the upright state is rotated to shift to the ground contact state, and the shock absorbing action of the shock absorber 32 is transmitted to the front table 6. I have.

The operation of the present invention configured as described above will be described. First, when carrying out cargo handling work,
As shown in (A), the lift table 5 which is folded and stored under the floor 2A is lowered by the hydraulic cylinder 14 via the lifting post 10. At this time, along with the lowering operation of the lift table 5, the side of the pivot 10A connected to the elevating post 10 is lowered, while the free end side of the lift table 5 is provided with the guide roller 16 as the table raising mechanism 22 on the guide rail 17. To the rear side of the packing box 2, whereby the lift table 5
Rises from a horizontal state to a state inclined slightly toward the packing box 2 side. In the retracted state of the lift table 5 shown in FIG. 2A, the engagement roller 26 is engaged with the escape groove 29.
When the lift table 5 is tilted by the above-described rising mechanism 22 from this state, the engagement roller 26 is urged in the counterclockwise direction by the weight 30 to apply a downward rotating force, as shown in FIG. As described above, when the engagement groove 27 is horizontal by the rotation of the front table 6 by the hydraulic cylinder 14, that is, when the continuous groove 28 is vertical, the engagement roller 26 locked on the escape groove 29 side by the urging force of the weight 30. Is fixed to the lower end of the engaging groove 27 via the continuous groove 28, and the link arms 23, 23A, which are the ground members 25, are bent in a dogleg shape as shown in FIG. It protrudes downward from the lift table 5. When the lift table 5 is lowered in this state, FIG.
As shown in (B), the pivotal support portions of the preceding link arms 23, 23A are in contact with the grounding surface A, and the engaging roller 26 is
Along with the edge of the engagement groove 27. Until the lifting post 10 is grounded, each link arm
The lift table 5 is rotated by 23 and 23A in the developing direction, that is, the rear side of the packing box 2, and the table rising mechanism 22 further tilts and lifts the lifting table 5 slightly inclined to the packing box side. By doing so, when the lift table 5 is unfolded, the operator can unfold the tables 5 and 6 in an easy posture and touch the ground.
In this embodiment, when the tables 5 and 6 are unfolded and the tables 5 and 6 are grounded, the work is carried out between the front table 6 and the pivot 10A. The front table 6 does not suddenly fall down due to the shock absorbing action of the shock absorber 32, so that the front table 6 can be grounded with a light force, and the shaft 34 provided at the tip of the rod is used during the standing state from the horizontal storage state. Long hole
By rolling along the front table 35, the shock absorbing action of the shock absorber 32 is not transmitted to the front table 6,
Can be smoothly shifted to the standing state. The link arms 23, 23A between the time when the pivot portions of the link arms 23, 23A are in contact with the ground plane A and the time when the lifting post 10 is grounded.
The mounting arm 31 provided integrally with the link arm 23 rotates by the movement of A, and the weight 30 of the mounting arm 31 and the pivot 10
Due to the positional relationship A, the rotation urging force of the engagement roller 26 by the weight 30 is switched from the counterclockwise direction to the clockwise direction. When the table 6 is grounded with the pivot 10A as a fulcrum, the period from the initial rotation of the front table 6 to the time when the mounting arm 31 of the weight 30 is grounded as described above in FIG.
As shown in (B) , a rotational force in the clockwise direction is applied to the engagement roller 26 by the weight 30, and the engagement roller 26 is abutted and held on the end of the engagement groove 27. However, when the mounting arm 31 of the weight 30 is in contact with the ground, the rotation of the link arms 23 and 23A by the weight 30 is restricted, so that the engagement is performed until the front table 6 is in contact with the ground as shown in FIG. roller
26 slides along the engaging groove 27 toward the continuous groove 28, and when the engaging roller 26 is inserted into the continuous groove 28, the link arm 23
Due to its own weight, the engaging roller 26 falls into the escape groove 29 and
Switch to the 29 side, and in this state, each link arm
23, 23A project above the lift table 5, and even if the lift table 5 is lifted and grounded again, the engagement roller
The lift table 5 is not rotated by the respective link arms 23 and 23A unlike the case where the lift table 5 is lowered, just because the 26 rolls along the escape groove 29.

Next, the lift table 5 is folded and
4A, the inclined plate 8 and the rear table 7 are sequentially folded on the front table 6 as shown in FIG. Guide roller 16 provided on the front table 6
To the guide rails 17 and thereafter, the lift table 5 is raised, and the lift table 5
A is stored.

As described above, in the present invention, when each of the tables 6 and 7 is unfolded behind the packing box 2 during loading, the table raising mechanism 22 and the grounding member 25 automatically operate in conjunction with the lowering of the lift table 5. Since the lift table 5 can be inclined upright to the worker side and stand up, and it is not necessary to raise the lift table 5 stored horizontally in the back side of the floor 2A, the labor of the worker can be reduced. In addition, when the lift table 5 in the standing state is grounded, the front table 6 does not suddenly fall down due to the shock-absorbing action of the shock absorber 32 installed between the front table 6 and the pivot 10A, and the front table 6 is lightly moved. 6 can be grounded. In addition, the lift table 5 can be automatically tilted to the operator's side and stand up by mechanical means having a simple structure without using special driving means such as a hydraulic cylinder as in the conventional example.

FIGS. 7 to 9 show a second embodiment of the present invention. The same parts as those in the first embodiment are represented by the same combinations.
A detailed description will be omitted.

In this embodiment, the lift table 5 is connected to the packing box 2 via the left and right upper arms 40 and the left and right lower arms 41.
To the upper arm.
A push lever 44 pivotally attached to the pivot 40A of the lift table 5 and the push table 45, a push roller 45 pivotally supported on the distal end side of the push lever 44, and the left and right lower arms 41. A guide plate formed on the receiving plate 46 and on which the pressing roller 45 is placed.
It consists of 46. As in the first embodiment, a grounding member 25 is formed by pivotally connecting the ends of two link arms 23 and 23A having different lengths with a shaft 24, and the base of the short link arm 23 is provided. Left and right upper arms 40 at the end
On the other hand, an engagement roller 26 which is pivotally supported on the pivot 40A of the front table 6 and which is pivotally supported on the base end side of the long link arm 23A is engaged with engagement grooves 27 provided on both sides of the front end of the front table 6. As in the first embodiment, a continuous groove 28 serving as a lock release mechanism is
And an escape groove 29 longer than the engagement groove 27 is provided continuously. In this embodiment, each link arm 23, 23A is constantly biased counterclockwise to the pivot 40A of the link arm 23 so that each link arm 23, 23A protrudes below the lift table 5. Spring 47 is attached.

When carrying out the cargo handling work, the lift table 5 which is folded and stored under the floor 2A is mounted on the hydraulic cylinder.
The extension of 14 causes the lower arm 41 to descend via the left and right upper arms 40 and the left and right lower arms 41. At this time, as shown in FIG.
The pressing roller 45 and the guide plate 47 on the receiving plate 46 which constitute the table raising mechanism 42 with the lowering operation of the lift table 5.
And the lift table 5 is pushed up by the pressing lever 44 via the pressing roller 45 to an almost upright state.
In this case, when the lift table 5 is stored, the engaging roller 26 is engaged with the escape groove 29 as in the first embodiment. When the lift table 5 is lowered from the above state by the table raising mechanism 42 described above, the engaging roller 26 is engaged with the engaging groove 27 by the winding spring 47 via the continuous groove 28. Thereafter, the lift table 5 is lowered to bring the shaft support portions of the preceding link arms 23 and 23A into contact with the ground, and the lift table 5 is further rotated by the link arms 23 and 23A. When the lift table 5 touches the ground, the rotation of the link arm 23A is regulated by the touch as shown in FIG. 9 , and when the lift table 5 is unfolded and touched in this state, the engaging roller 26 moves along the engaging groove 27. When it reaches the continuous groove 28, it escapes due to the weight of the link arm 23.
When the lift table 5 is lowered, the engagement roller 26 that engages with the engagement groove 27 engages with the relief groove 29. Therefore, when the lift table 5 is used in the same manner as in the first embodiment, even if the lift table 5 is lifted and grounded again, each link arm is merely rolled along the relief groove 29 by the ground engaging roller 26. The lift table 5 is not rotated by 23 and 23A.

As described above, in the present embodiment, when each of the tables 6 and 7 is deployed behind the packing box 2 during loading, the lifting mechanism 42 and the grounding member 25 automatically interlock with the lowering of the lift table 5. By raising the lift table 5 so as to be inclined toward the worker side, the labor of the worker involved in unfolding the lift table 5 can be reduced as in the first embodiment.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, an example is shown in which an entrance is formed on the rear surface of a packing box.However, the entrance may be set according to the purpose of use, such as forming an entrance on the left side wall or the right side wall or on the side wall surface and the rear surface.
Further, the opening and closing door for opening and closing the entrance is not limited to a double door opening and closing door, but can be applied to various types such as a strut type and a vertical folding door type. Furthermore, the hydraulic cylinder is used as the lifting device in the first embodiment, and the hydraulic cylinder is directly attached to the lifting post of the lift table. However, the lifting post is hung via a connecting member such as a chain, and the hydraulic cylinder or the air The lift table may be moved up and down via a connecting member by various cylinder devices such as a cylinder. Further, the structure of the elevating device may be appropriately set, for example, by winding the connecting member with an electric winch or the like and elevating the lift table. Further, the lift table is shown as being divided into two parts. However, the present invention is not limited to this example. In addition, the urging member made of the weight of the first embodiment or the like is applied to the second embodiment, or the urging member made of the winding spring of the second embodiment is applied to the first embodiment. May be.

[0020]

[Effect of the Invention] The present invention relates to a lift device for a lorry in which a lift table which can be unfolded and folded on a packing box is provided so as to be liftable, and this lift table is folded and stored under the floor of the packing box in a substantially horizontal state. A table raising mechanism that raises the lift table in the horizontal storage state in conjunction with the lowering operation of the lift table; and a table that is detachably provided to the lift table and that is at least lower than the lift table in the raised state by a biasing member. A ground contact member that tilts the lift table in a standing state that protrudes from the ground table, and a lock release mechanism that releases the engagement between the ground member and the lift table when the lift table is in the ground-deployed state. In the retracted lift device, the lift table is automatically tilted in the lift table deployment direction by mechanical means with a simple structure It is possible to provide a lifting device of the truck which can Rukoto.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an expanded state of the lift table.

FIG. 3 is a sectional view showing a use state of the lift table.

FIG. 4 is a sectional view showing a stored state of the lift table.

FIG. 5 is a front view showing an operation state of the lock release mechanism.

FIG. 6 is a cross-sectional view showing the periphery of the shock absorber.

FIG. 7 is a sectional view showing a second embodiment of the present invention.

FIG. 8 is a front view showing an expanded state of the lift table.

FIG. 9 is an enlarged front view of the main part.

[Explanation of symbols]

 2 Packing box 5 Lift table 22, 42 Raising mechanism 25, 42 Grounding member 28 Continuous groove (lock release mechanism) 29 Relief groove (lock release mechanism) 30 Weight (biasing member) 47 Winding spring (biasing member)

Claims (1)

(57) [Scope of request for utility model registration] 1. A lift device for a lorry, wherein a lift table which is deployable and foldable is provided on a packing box so as to be able to ascend and descend, and the lift table is folded and stored substantially horizontally below the floor of the packing box. A table raising mechanism that raises the lift table in the horizontal storage state in conjunction with the lowering operation of the lift table, and is provided to be detachable from the lift table, and protrudes at least below the lift table in the raised state by the urging member. A lift for a lorry, comprising: a grounding member for tilting a lift table in a state; and a lock release mechanism for releasing engagement between the grounding member and the lift table when the lift table is in a grounded and deployed state. apparatus.