JP2008120374A - Lifter device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifter device for vehicle, capable of storing a cargo or lifting table under the floor of a vehicle body or moving it from a storage position under the floor to a loading or lifting position without manual operation. <P>SOLUTION: The cargo table 15 can be successively moved among a loading position c, an unloading position b, and the storage position a while retaining its horizontal state by rotating a power arm 33 by a cargo cylinder 13A. The cargo table 15 is movable between a position under the floor of a loading platform and the loading position c. Since each lifting operation arm 38 is folded at the tip near the unloading position b, no trouble is caused even if the floor level height of the loading platform 12 is slightly changed. Since adjacent lifting operation arms 38 are mutually separated in the vehicle width direction and the vehicle length direction, the cargo table 15 can be rotated from the storage position a to the loading position c at an angle exceeding 180°. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle lifter that stores a table used in a vehicle bed, a lift opening, etc. under the floor, and more particularly to a vehicle lifter device that lifts and lowers a cargo handling table by an arm rotation mechanism provided under the floor.

In order to facilitate the cargo handling work, a truck lifter device that raises and lowers the load is provided on the truck (for example, Patent Document 1).
In Patent Document 1, a parallelogram link mechanism is provided under the floor of the cargo bed, and a folding table that can be folded in two at the front end of the parallelogram link mechanism is provided so as to be rotatable about a horizontal axis. This is an underfloor retractable lift device that lifts and lowers a cargo handling table while maintaining a horizontal state by a parallelogram link mechanism that rotates in a vertical plane about a horizontal axis by a cylinder.
JP 2005-119372 A

However, in the cargo handling device disclosed in Patent Document 1, the operator folds the cargo handling table in half and stores it under the floor of the loading platform when storing the cargo handling table. The table had to be extended manually by the operator, which was hard work.
Therefore, it is conceivable to rotate the cargo handling table from under the floor to the unloading position. However, in Patent Document 1, since the parallelogram link mechanism is adopted as the link type rotation mechanism, the rotation angle is about 170 ° at the maximum. Met. That is, further rotation cannot be performed because the vertically arranged links interfere with each other.

That is, the present invention can store a table for loading / unloading under a floor such as a loading platform or move it from a storage position under the floor to a position such as unloading without manual intervention. It is an object of the present invention to provide a lifter device for a vehicle that can move a table for unloading, etc. between an unloading position, an unloading position, and a storage position without causing any trouble while grounding the table for use.
Further, according to the present invention, when the table for loading / unloading moves between the unloading position and the storage position, the table for loading / unloading can be prevented from fluttering, and each lifting operation arm can be folded under the floor such as the loading platform. An object of the present invention is to provide a vehicle lifter device that can be stored compactly and that can reduce the turning radius of each lifting operation arm.
Another object of the present invention is to provide a lifter device for a vehicle that utilizes a hydraulic cylinder or the like and can rotate an arm body within a range of 5 ° to 300 °, particularly 180 °, around its rotation axis. .

According to the first aspect of the present invention, a table is provided in a horizontal state using an arm rotation mechanism having a rotation drive unit at a loading platform or an elevator opening of a vehicle so that the table can be moved up and down. In the lifter device for a vehicle to be stored under the floor, the arm rotation mechanism has one end rotatably connected to the underfloor member of the loading platform or the lift opening around the first rotation shaft, An end portion has a pair of lifting operation arms connected to the table so as to be rotatable about a second rotation shaft provided in parallel with the first rotation shaft. The lifting / lowering operation arms are separated in the axial direction of the first rotation shaft and also in the direction orthogonal to the axial line, and each of the lifting / lowering operation arms includes an arm body on the underfloor member side and an arm tip on the table side And a pin provided in parallel with the first rotation axis. The two arm bodies have the same turning radius around the first turning shaft on the side of each underfloor member at the tip of each arm body, and are configured to be connected to each other so as to be rotatable about an axis. The turning radius is shorter than the height from the ground to the axis of the first turning shaft on the underfloor member side, and both arm tips have the same turning radius around each pin shaft at the tip. This is a vehicle lifter device.
According to the first aspect of the present invention, the table is kept in a horizontal state by rotating the arm main body in the vertical plane around the first rotation axis on the underfloor member side by the rotation driving unit. , Sequentially moving between a first position for unloading and the like, a second position substantially below the first position, and a third position for storage away from the first position. Accordingly, the table can be stored under the floor of the vehicle body, and the table can be sequentially moved from the floor under the storage position to the second position for unloading or the like and the first position for unloading or the like.
When the table is moved, the table is grounded before the tip of each arm body reaches the lowest point in the vicinity of the second position for unloading, and then moves horizontally while being in a grounded state for a while. That is, the movement trajectory of the table is not a simple arc shape, but a substantially C-shaped trajectory in which the opening side is upward and the middle portion is a straight portion. Thereby, for example, even if the load amount of the load on the loading platform increases or decreases and the height of the floor surface of the loading platform changes slightly, this change can be automatically followed. As a result, the table is always grounded at the unloading position (second position), and the table is unloaded and unloaded (first position), unloading position (second position), and storage position (third position). ). Here, the vehicle can include an occupant, auxiliary equipment for transporting cargo, a ship, an aircraft, and the like.

According to a second aspect of the present invention, a cargo handling table is provided at a rear portion of a vehicle bed so that the cargo handling table can be moved up and down in a horizontal state using an arm rotation mechanism having a rotation drive unit. In the lifter device for a vehicle housed under the floor, the arm rotation mechanism is pivotally connected to an underfloor member of the cargo bed about a rotation axis whose axis is directed in the vehicle width direction. The other end portion has a pair of elevating operation arms connected to the cargo handling table so as to be rotatable about another rotation axis whose axis is directed in the vehicle width direction, and the pair of elevating operations The arm is separated in the vehicle width direction and also in the vehicle length direction, and each lifting operation arm has a pin shaft whose axis extends in the vehicle width direction between the arm body on the underfloor member side and the arm tip on the cargo handling table side. Each of which is pivotally connected around the center. The rotation main body has the same rotation radius around the rotation axis of each under-floor member at each end, and these rotation radii extend from the ground to the axis of the rotation axis of each under-floor member. The both arm tip portions are vehicle lifter devices having the same turning radius around the respective pin shafts at the respective tips.
According to the second aspect of the present invention, the vehicle body is kept in a horizontal state by rotating the arm main body in the vertical plane around the rotation shaft on the underfloor member side by the rotation drive unit. It moves sequentially between the unloading position at the rear (back of the loading platform), the unloading position almost directly below, and the storage position in front of the vehicle from the rotation shaft on the underfloor member side (the reverse is the opposite). As a result, it is possible to store the cargo handling table under the floor of the loading platform or sequentially move the cargo handling table from the underfloor position to the unloading position and the unloading position without manual intervention.
Each arm body has a turning radius at each end shorter than the height from the ground to the axis of the rotating shaft on the underfloor member side, and each arm tip is rotatable about the pin axis. It is connected (axially supported). Therefore, when the loading table is moved (during loading / unloading work and when the loading table is stored under the floor), the loading table is grounded near the unloading position before the tip of each arm body reaches the lowest point, and after that, Move horizontally. That is, the movement trajectory of the cargo handling table is not a simple arc, but a substantially C-shaped trajectory with the opening side facing upward and the middle portion being a straight line. Thereby, for example, even if the load amount of the load on the loading platform increases or decreases and the height of the floor surface of the loading platform changes slightly, it can automatically follow it. As a result, the cargo handling table can be moved (turned) between the unloading position, the unloading position, and the storage position without hindrance, while always grounding the cargo handling table at the unloading position.

  In addition, for example, the 270 ° rotation from the storage position to the unloading position can be performed while the loading table is in a horizontal state. The two lifting operation arms are separated in the vehicle width direction and the vehicle length direction. It is because it comprised as follows. As a result, a rotation exceeding 170 °, which was not possible with a conventional simple parallelogram link mechanism, was made possible.

As this vehicle, for example, an automobile (including a truck and a bus) having a dump type carrier or a container type carrier, a railway vehicle, and the like can be adopted.
The vehicle lifter device may be provided on a side portion (an end portion in the vehicle width direction) of the loading platform of the vehicle. In this case, the axis of each rotation shaft and pin shaft of the arm rotation mechanism extends in the vehicle length direction. The vehicle length direction is the longitudinal direction of the vehicle, and the vehicle width direction is the lateral direction of the vehicle. Moreover, you may provide in the elevator port, such as vehicles, such as a bus and a ship. Since it is the structure which lifts up by holding a table horizontally to an elevator, it is convenient for raising and lowering a wheelchair.
For example, various actuators such as a hydraulic cylinder, a hydraulic motor, and an electric motor can be employed as the rotation drive unit of the arm rotation mechanism.
Examples of the shape of the cargo handling table (elevating table) include a polygonal shape including a rectangular shape in a plan view, a circular shape, and an elliptical shape.
Raising and lowering the cargo handling table in a horizontal state means raising and lowering the cargo handling table with the upper surface of the cargo handling table horizontal.
Storing under the floor of the loading platform means a state where more than half of the loading table is hidden under the loading platform in plan view.

One pair of lifting operation arms may be disposed, for example, only at an intermediate portion in the vehicle width direction of the cargo handling table, or one pair may be disposed at both ends of the cargo handling table in the vehicle width direction.
The two lifting operation arms that are paired always rotate while maintaining a parallel state.
One end portion of the lifting operation arm and the underfloor member of the loading platform, and the other end portion of the lifting operation arm and the cargo handling table are connected by a rotation shaft.
The ratio of the length of the arm body and the arm tip is arbitrary.
The arm body may be a straight arm or an arbitrarily bent (curved) arm.
The reason why the turning radius of the tip of the arm body is shorter than the height from the ground to the axis of the turning shaft on the underfloor member side is that the arm body is at the bottom because of the presence of the arm tip that is pivotally supported by the arm body. This is a configuration necessary for grounding the cargo handling table before reaching the point, and then moving the cargo handling table horizontally while grounded for a while.
The elevating operation arm can be folded in two with the pin axis as the center.
The lifting / lowering operation arm has a length when one end of the lifting / lowering operation arm is fixed and stationary in the air, and is longer than the height from the ground to the axis of the rotation shaft on the underfloor member side.

  According to a third aspect of the present invention, one end of the pin shaft of the lifting / lowering operation arm is extended and exposed, a hook receiving portion is provided in the exposed portion, the cargo handling table is grounded, and the lifting / lowering is performed. The lifter device for a vehicle according to claim 2, wherein a hook that hooks the hook receiving portion when the operation arm is folded in two around the pin shaft is provided on the cargo handling table.

According to the third aspect of the present invention, when the cargo handling table is grounded at the unloading position and moves horizontally while the cargo handling table is in a grounded state for a while, each arm tip portion is centered on the rotation axis on the cargo handling table side. Then, each lifting operation arm is gradually folded in two. Along with this, the hook receiving portion of the pin shaft at the arm tip gradually approaches the hook side of the cargo handling table, and finally the hook receiving portion is hooked on the hook. As a result, when the cargo handling table moves between the unloading position and the storage position, the cargo handling table is prevented from fluttering (swinging), and each lifting operation arm is folded and stored compactly under the floor of the cargo bed. Can do.
Also, when the cargo handling table moves from the unloading position to the unloading position, each lifting operation arm released from the hook is folded in half by the weight of the cargo handling table and the arm tip. Thus, during the rotation, each lifting operation arm is folded in two around the pin axis in the vicinity of the storage position and the vicinity of the unloading position. Thereby, the turning radius of each raising / lowering operation arm can be made small.

The hook receiving portion may be, for example, a roller or a simple protrusion. You may provide a hook receiving part in the both ends of a pin axis, respectively.
When the cargo handling table is grounded and the lifting operation arm is folded in two with the pin shaft as the center, the grounded cargo handling table is grounded for a while as the lifting operation arm is rotated by the rotation drive unit. When moved, since the lifting operation arm is longer than the height from the ground to the axis of the rotation axis on the underfloor member side, it means that the lifting operation arm is folded in two around the pin axis.
The shape of the hook and its formation position on the cargo handling table are arbitrary as long as the hook receiving portion can be hooked.

  According to a fourth aspect of the present invention, the rotation angle of each arm body is 1 ° to 360 °, and the rotation drive unit rotates at least one arm body by less than 180 ° for one time. The lifter device for a vehicle according to any one of claims 1 to 3, further comprising a plurality of hydraulic cylinders that are rotated at an angle and divided into a plurality of times.

According to the fourth aspect of the present invention, generally, the maximum rotation angle when the rod of one hydraulic cylinder is taken in and out and the rotation shaft connected to this rod (for example, connected by a link) is rotated is , About 170 °. In this case, the cargo handling table cannot be moved between the unloading position and the storage position that are separated by at least 180 ° around the rotation axis on the underfloor member side.
Therefore, at least one arm body is rotated in a plurality of times at a rotation angle of less than 180 ° for one time. Accordingly, the arm main body can be rotated around the rotation axis by 1 to 360 degrees (or 5 to 300 degrees), particularly in a range exceeding 180 degrees by using the hydraulic cylinder.

  The number of hydraulic cylinders used is determined by how many times the arm body is rotated. The arm main body to be rotated may be all arm main bodies or an arbitrary number of them.

According to the first and second aspects of the present invention, for example, the loading table is unloaded and unloaded while the horizontal state is maintained by rotating the arm body about the rotation axis by the rotation drive unit. It is sequentially moved between the position and the storage position. As a result, it is possible to store the cargo handling table under the floor of the loading platform and to move the cargo handling table from the floor to the unloading position and the unloading position sequentially without human intervention.
Also, in the vicinity of the unloading position, the loading table should be grounded before the tip of each arm body reaches the lowest point, and after that, each lifting operation arm should be bent forward and move horizontally while grounding. Because it is configured, even if the floor height of the loading platform changes slightly, the loading table is moved sequentially between the unloading position, the unloading position, and the storage position while the loading table is always grounded at the unloading position. Can do.
In addition, since the adjacent lifting operation arms are separated not only in the vehicle length direction but also in the vehicle width direction, the cargo handling table can be rotated at an angle exceeding 180 ° from the storage position to the unloading position in a horizontal state. it can.

  According to the invention described in claim 3, since the hook receiving portion of the pin shaft is hooked on the hook of the cargo handling table when the cargo handling table after the grounding moves horizontally, the cargo handling table is unloaded. When moving between the storage position and the storage position, the cargo handling table can be prevented from fluttering, and each lifting operation arm can be folded compactly and stored under the floor of the loading platform. Further, the turning radius of each lifting operation arm can be reduced.

  According to the fourth aspect of the present invention, a plurality of hydraulic cylinders are used, and at least one arm body is rotated in a plurality of times at a rotation angle of less than 180 ° for one time. Therefore, using the hydraulic cylinder, the arm body can be rotated in the range of 1 ° to 360 °, particularly 180 ° around the rotation axis.

  Examples of the present invention will be specifically described below.

1 to 4, reference numeral 10 denotes a vehicle lifter device according to a first embodiment of the present invention. This vehicle lifter device 10 is provided at a rear portion of a container-type cargo bed 12 of a truck (vehicle) 11 at a rotational drive unit. The cargo handling table 15 is provided so as to be movable up and down in a horizontal state by using an arm turning mechanism 14 having 13, and the cargo handling table 15 is stored under the floor at the rear part of the loading platform 12.
Next, these components will be described in detail with reference to FIGS.

  As shown in FIGS. 1 to 4 and 22, the cargo handling table 15 is a metal plate having a rectangular shape in plan view, and wheels 16 are disposed on the lower surfaces of the four corners. Both long sides of the cargo handling table 15 are slightly shorter than the vehicle width of the truck 11, and both short sides of the cargo handling table 15 are slightly longer than the length in the front-rear direction of the carriage 18 with casters 17. On both short sides of the cargo handling table 15, table frames 19 having a rectangular cross section are formed. A side portion on the vehicle rear side of the cargo handling table 15 is a slope portion 20 that gradually inclines downward toward the rear of the vehicle. A detailed description of the cargo handling table 15 will be described later.

Next, the arm rotation mechanism 14 will be specifically described with reference to FIGS.
The arm rotation mechanism 14 is provided under the floor of the loading platform 12. Both side members 21 of the vehicle body frame are spaced apart from each other in the vehicle width direction at an intermediate portion in the vehicle width direction under the floor. A power shaft (rotating shaft on the under-floor member side) 22 and an auxiliary shaft (rotating shaft on the under-floor side) 23 each having an axis directed in the vehicle width direction and an auxiliary shaft (rotating shaft on the under-floor side) 23 are provided at the ends of the side members 21 on the vehicle rear side. A pair of bearing boxes 24 that are axially spaced apart are provided. The power shaft 22 is disposed on the front side of the vehicle, and the auxiliary shaft 23 is disposed on the rear side of the vehicle. The auxiliary shaft 23 is longer than the power shaft 22. Sprockets 25 having the same number of teeth are respectively fixed in the vicinity of intermediate portions of the power shaft 22 and the auxiliary shaft 23, and an endless chain 26 is bridged between both sprockets 25. Thereby, when the power shaft 22 rotates, the rotational force is transmitted to the auxiliary shaft 23, and both the members 22 and 23 rotate in the same direction at the same speed.

  A cylinder frame (underfloor member) 27 extending in the vehicle width direction is horizontally mounted on the side of the vehicle center from the bearing boxes 24 of both side members 21. At the intermediate portion of the cylinder frame 27 in the length direction, the base portion of a hydraulic large-diameter cargo handling cylinder 13A is supported via a clevis base 28 via a connecting shaft 29 whose axial direction is in the vehicle width direction. Has been. The tip of the rod of the cargo handling cylinder 13A is axially oriented in the vehicle width direction between the tips of a pair of cargo handling side cylinder arms 30 whose base is fixed to the middle in the longitudinal direction of the power shaft 22. It is pivotally supported by the connecting shaft 31. Further, another clevis base 28 is fixed in the vicinity of the middle portion of the cylinder frame 27 in the length direction (on the opposite side of the sprocket 25 across the cargo handling cylinder 13A). On this other clevis base 28, the base portion of a hydraulic small-diameter storage cylinder 13 </ b> B is pivotally supported by a connecting shaft 29 whose axial direction is in the vehicle width direction. The axial directions of the cargo handling cylinder 13A and the storage cylinder 13B are each directed in the vehicle length direction (vehicle longitudinal direction). The storage cylinder 13B is slightly shorter than the cargo handling cylinder 13A. The distal end of the rod of the storage cylinder 13B has an axial direction in the vehicle width direction between the distal ends of a pair of storage cylinder arms 32 whose base is fixed near the middle portion of the power shaft 22 in the longitudinal direction. It is pivotally supported by the connecting shaft 31. In the circumferential direction of the power shaft 22, the angle difference between the cargo handling side cylinder arm 30 and the storage side cylinder arm 32 is about 90 °.

  The base portions of a pair of power arms (arm bodies) 33 are fixed to both ends of the power shaft 22. Each power arm 33 is a plate material having a substantially L shape when viewed in plan and parallel to each other in side view, and one end portion of the short side portion of each power arm 33 is fixed to the power shaft 22. The two power arms 33 are angle-adjusted in the circumferential direction around the power shaft 22 so that the L-shaped opening sides face the rear of the vehicle when the cargo handling table 15 is stored. The turning radius of the tips of both power arms 33 is shorter than the height from the ground to the axis of each power shaft 22. A pair of linear power links (arm tip portions) 34 that are spaced apart in the vehicle width direction are arranged at the front end portions of the long side portions of the two power arms 33 bent in a substantially U shape. It is rotatably connected via a pin shaft 35 directed in the width direction. The length of each power link 34 is shorter than the length of the power arm 33. The front ends of the opposing power links 34 are respectively attached to bearings 37 on the front end portions of the table frames 19 through the rotation shaft 36 on the cargo handling table 15 side with the axial direction facing the vehicle width direction. It is pivotally supported. A hook return pin 39 protrudes outward from the power link 34 on the outer side in the vehicle width direction at an intermediate portion in the length direction. The end of each pin shaft 35 on the inner side (the cargo handling table 15 side) is extended and exposed. A roller (hook receiving portion) 40 whose axis is directed in the vehicle width direction is pivotally supported by these exposed portions. The power arm 33 and the power link 34 constitute a power-side lifting operation arm 38.

In addition, the base portions of a pair of auxiliary arms (arm main bodies) 41 are fixed to both ends of the auxiliary shaft 23, respectively. Each auxiliary arm 41 is a plate member that is parallel to each other in a plan view and has a substantially square shape in a side view, and one end portion of a long side portion thereof is fixed to the auxiliary shaft 23. Both auxiliary arms 41 are angle-adjusted in the circumferential direction with the auxiliary shaft 23 as the center so that the opening side of each of the heels faces the rear of the vehicle when the cargo handling table 15 is stored. The turning radius of the tips of both auxiliary arms 41 is shorter than the height from the ground to the axis of each auxiliary shaft 23. A pair of linear auxiliary links (arm tip portions) 42 spaced apart in the vehicle width direction are provided at the distal end portions of the short side portions of the auxiliary arms 41 so as to have a pin shaft whose axial direction is directed in the vehicle width direction. Via 35, it is connected to be freely rotatable. The length of each auxiliary link 42 is shorter than the length of the auxiliary arm 41. The front ends of the opposing auxiliary links 42 are on a bearing stand 44 that protrudes outward from the intermediate portion in the length direction of the table frames 19 via a rotating shaft 43 whose axial direction is in the vehicle width direction. The bearings 45 are pivotally supported. The end of each auxiliary link 42 on the cargo handling table 15 side is cut obliquely so that the cargo handling table 15 does not tilt due to the load of the carriage 18 when the cargo handling table 15 moves from the unloading position b to the unloading position c. Thus, the stopper portion 42a is brought into contact with the upper surface of the cargo handling table 15 at an inclination angle of about 60 °. The auxiliary arm 41 and the auxiliary link 42 constitute an auxiliary lifting operation arm 38.
A plate-like stopper 47 that restricts the rotation of a first hook 46 to be described later projects from the lower part of the outer surface of the both bearings 37 in the vehicle width direction. Further, of both table frames 19, on the outer surface in the vehicle width direction in the vicinity of the standing portion of the bearing 37, the plate is slightly behind the hook connection shaft 48 that is the rotation center of the first hook 46. Each of the other stoppers 49 has a protruding shape.

Next, the structure of the cargo handling table 15 will be described in detail with reference to FIGS.
An elongated hook connecting shaft 48 that passes through both table frames 19 and whose axial direction faces the vehicle width direction is horizontally mounted on the long side portion of the cargo handling table 15 on the vehicle rear side. The base portions of the first hooks 46 are fixed to both ends of the hook connection shaft 48 exposed to the outside. Both first hooks 46 are metal plate members and have a substantially seven-letter shape when viewed from the side. Both first hooks 46 have the substantially seven-shaped opening side facing the rear of the vehicle. Hook stoppers 50 that project against the stoppers 47 when the first hooks 46 stand upright protrude from the inner side surfaces of the first hooks 46 near the base portions.
In addition, in the inner space of the cargo handling table 15, the base portions of the spring arms 51 are fixed to the vicinity of both ends of the hook connection shaft 48. One end portions of a pair of hook springs 53 are rotatably connected to the tip portions of both spring arms 51 via connecting pins 52 whose axial direction is in the vehicle width direction. Both hook springs 53 urge the first hook 46 so as to always stand vertically. Both hook springs 53 rotate in opposite directions after a certain angle. The other end portions of both hook springs 53 project from the inner surface of both table frames 19 near the mounting portion of the bearing base 44, and rotate to a connecting shaft 54 whose axial direction is in the vehicle width direction. It is connected freely.

  As shown in FIGS. 22 to 25, the long side portion of the cargo handling table 15 on the vehicle front side has a length substantially the same as the separation length of the two table frames 19 along the slope portion 20 and is flat. An elongated strip-shaped opening 55 is formed as viewed. In the opening 55, a caster stopper plate 56 having substantially the same planar shape as the opening 55 and having an approximately L-shaped cross section is directed downward, and the both ends thereof turn to the table frames 19 with the axis line directed in the vehicle width direction. The caster shaft 57 is freely supported and is pivotally connected. Along with this rotation, the caster stopper plate 56 protrudes from the upper surface of the cargo handling table 15. The caster stopper plate 56 is formed with trapezoidal end plates as viewed from the side at both ends in the length direction. When the caster stopper plate 56 protrudes from the upper surface of the cargo handling table 15 at both ends in the length direction of the side plate portion on the vehicle direction front side of the caster stopper plate 56, the caster spring 58, which will be described later, rotates on the rising side. The insertion openings 56a are formed so as not to obstruct each other. In the portion of the opening 55 of the cargo handling table 15 that faces the both insertion ports 56a, another insertion port 15a that performs the same function is formed.

  The caster shaft 57 is disposed in the cargo handling table 15 in the vicinity of the upper end of the slope portion 20. Spring mounting bases 59 are respectively fixed to the inner side surfaces of both end portions of the caster stopper plate 56 in the length direction. One end of a caster spring 58 is connected to each of the spring mounting bases 59 via a connecting pin 60 whose axial direction faces the vehicle width direction. The other end of the caster spring 58 protrudes on the inner surface of the table frame 19 slightly behind the opening 55 from the opening 55, and is rotatable about a connecting shaft 61 whose axial direction is in the vehicle width direction. It is connected to. The caster spring 58 biases the caster stopper plate 56 so as to always protrude from the upper surface of the cargo handling table 15. The caster spring 58 has a telescopic telescopic shaft 62 as a core material, and a coil spring is extrapolated thereto.

  Of the caster stopper plate 56, both end portions in the longitudinal direction of the side plate portion on the rear side in the vehicle direction (a plate portion where the height of the upper surface and the outer surface of the cargo handling table 15 is aligned when the caster stopper plate 56 is immersed in the opening 55). In the plan view, hook rods 63 whose front ends protrude outward from both table frames 19 in plan view are provided so as to protrude in the vehicle width direction. Between both table frames 19, between the lower portions in the vicinity of the substantially intermediate portion in the width direction of the opening 55, a hook operation shaft in which the axial direction faces the vehicle width direction and both end portions protrude outward from both table frames 19. 64 is pivoted horizontally. At the exposed end portions of the hook operation shaft 64, the base portions of the second J-shaped second hook 65 are fixed in parallel. Both the second hooks 65 are metal plates and are the same manual type as the first hooks 46. When the caster stopper plate 56 is submerged in the opening 55, both the second hooks 65 are raised, and the second hooks 65 are respectively hooked on the tip portions of the hooking rods 63.

Here, the hydraulic circuit of the vehicle lifter device 10 in the cargo handling cylinder 13A and the storage cylinder 13B will be described with reference to FIG. The hydraulic circuit shown here is an example.
The hydraulic device 70 of the vehicle lifter device 10 includes an oil tank 71, a first pipe 72 that supplies hydraulic oil in the oil tank 71 to the hydraulic chambers on the head side of the loading cylinder 13A and the storage cylinder 13B, the loading cylinder 13A, A second pipe 73 for returning the hydraulic oil in each rod-side hydraulic chamber of the storage cylinder 13B to the oil tank 71, an upstream side (oil tank 71 side) of the first pipe 72, and a downstream side (oil) And a communication passage 74 communicating with the tank 71 side).

  The downstream side of the first pipe 72 is divided into two branch pipes 72a and 72b. One branch pipe 72a communicates with the cargo handling cylinder 13A, and the other branch pipe 72b communicates with the storage cylinder 13B. An oil pump P with an electric motor M and a check valve 75 are sequentially provided in the upstream portion of the first pipe 72 toward the downstream. A two-way valve V <b> 2 is provided on the branch pipe 72 a on the cargo handling cylinder 13 </ b> A side of the first pipe 72. One of the internal flow paths communicates with the upstream end of the second communication path 76 whose downstream end communicates with the branch pipe 73a on the cargo handling cylinder 13A side of the second pipe 73. A slot valve 77 is provided in the second communication path 76. A branch pipe 72b on the storage cylinder 13B side of the first pipe 72 is provided with a three-way valve V1 and a slot check valve 78 sequentially toward the downstream.

  The upstream side of the second pipe 73 is divided into two branch pipes 73a and 73b. That is, one branch pipe 73a communicates with the cargo handling cylinder 13A (C2), and the other branch pipe 73b communicates with the storage cylinder 13B (C1). The branch pipe 73b on the storage cylinder 13B side of the second pipe 73 is provided with the three-way valve V1 and the slot check valve 79.

The basic hydraulic control by the hydraulic device 70 will be described.
By the operation of the oil pump P, the hydraulic oil in the oil tank 71 passes through the check valve 75 and is sent to the branch portion. From here, the hydraulic fluid that has flowed into the branch pipe 72a on the cargo handling cylinder 13A side is supplied to the head side hydraulic chamber of the cargo handling cylinder 13A via the two-way valve V2, and the rod protrudes. Thereby, the hydraulic oil in the rod side hydraulic chamber of the cargo handling cylinder 13 </ b> A is discharged to the branch pipe 73 a of the second pipe 73 and then returned to the oil tank 71. On the other hand, the hydraulic fluid that has flowed into the branch pipe 72a on the storage cylinder 13B side is supplied to the rod-side hydraulic chamber of the storage cylinder 13B via the three-way valve V1 and the slot check valve 78, and causes the rod to protrude. As a result, the hydraulic oil in the rod side hydraulic chamber of the storage cylinder 13B is discharged to the branch pipe 73b of the second pipe 73, and then returned to the oil tank 71 through the slot check valve 79 and the three-way valve V1 in sequence.

When the valve body of the two-way valve V2 is moved to the A side, the hydraulic oil in the oil tank 71 flows into the head side hydraulic chamber of the cargo handling cylinder 13A. When the valve body of the two-way valve V2 is moved to the B side, the hydraulic oil that has flowed into the branch pipe 72a on the storage cylinder 13B side is blocked by the three-way valve V1, while the hydraulic chamber on the head side of the cargo handling cylinder 13A. The hydraulic oil flows into the second communication passage 76.
When the valve body of the three-way valve V1 is moved to the A side, the hydraulic oil in the oil tank 71 is supplied to the head side hydraulic chamber of the storage cylinder 13B, and the hydraulic oil in the rod side hydraulic chamber of the storage cylinder 13B is supplied to the oil tank 71. Return to. When the valve body of the three-way valve V1 is moved to the B side, the hydraulic oil in the head side hydraulic chamber and the hydraulic oil in the rod side hydraulic chamber of the storage cylinder 13B are returned to the oil tank 71. When the valve body of the three-way valve V1 is moved to the C side, the hydraulic oil in the oil tank 71 is supplied to the rod side hydraulic chamber of the storage cylinder 13B.

  Next, with reference to FIGS. 1 to 29 and Table 1, the operation of the vehicle lifter device 10 according to the first embodiment will be described.

  When the cargo handling table 15 is stored, the caster stopper plate 56 rotates around the caster shaft 57 against the spring force of the caster spring 58, and the caster stopper plate 56 is submerged in the opening 55 of the cargo handling table 15. . Then, both the 2nd hooks 65 are raised and it latches at the front-end | tip part of both latching rods 63, respectively (FIGS. 23-25). As a result, the inconvenience caused by the caster stopper plate 56 protruding from the upper surface of the cargo handling table 15 can be eliminated while the cargo handling table 15 is being stored and moved from the storage position a to the unloading position b. it can. At this time, the rod of the storage cylinder 13B protrudes while the rod of the cargo handling cylinder 13A is in a hydraulic free state (FIGS. 5 and 6).

  When the cargo handling table 15 is moved from the storage position a to the unloading position b, the valve body of the two-way valve V2 is moved to the B side in a state where the cargo handling table 15 is arranged at the storage position a. Move body to C side. At this time, both the rollers 40 are hooked on the first hooks 46, and both the raising / lowering operation arms 38 are folded in two with respect to the pin shaft 35 (FIG. 1). When the electric motor M is driven in this state and the oil pump P is operated, the cargo handling cylinder 13A is in a hydraulic free state and only the rod of the storage cylinder 13B is pulled back (FIGS. 7 and 8). As a result, the power shaft 22 and the auxiliary shaft 23 connected to the power shaft 22 are forwardly rotated (rotated toward the cargo handling work side) by about 110 °. Along with this, the power-side lifting operation arm 38 and the auxiliary-side lifting operation arm 38 are each rotated forward by about 110 °, and the cargo handling table 15 at the storage position a is grounded for a while (about 45 ° rotation). During movement), the vehicle moves horizontally along the ground to the rear of the vehicle.

At this time, when the upper surface height of the floor 12a of the loading platform 12 is lowered by the load of the load, the bending angle of the power-side lifting / lowering operation arm 38 and the auxiliary-side lifting / lowering operation arm 38 is increased, and each roller 40 Is once removed downward from each first hook 46 (FIG. 21). However, when the cargo handling table 15 starts to rotate from the ground contact position to the unloading position, the rollers 40 are again hooked on the first hooks 46, so that the horizontal rotation of the cargo handling table 15 is not hindered. This is the same when the cargo handling table 15 moves from the unloading position b to the storage position a.
Thereafter, substantially all of the cargo handling table 15 reaches the unloading position b. Here, the operator manually removes both first hooks 46 from both rollers 40 (FIG. 11). Since both the first hooks 46 are connected to each other by the hook connecting shaft 48, if only one of the first hooks 46 is removed from the roller 40, the other first hook 46 automatically becomes the other roller 40. Deviate from. At this time, the hook springs 53 and the spring arms 51 correspond to each other in a straight line. Thereby, while the cargo handling table 15 is grounded, the tilted state of both the first hooks 46 is maintained.

  When loading the cart 18 with casters 17 on the grounded cargo handling table 15, the operator first defeats both the second hooks 65 and removes them from the front ends of the latch rods 63 (FIG. 22). At this time, since both the second hooks 65 are fixed to both ends of the hook operation shaft 64, the other second hook 65 is also hooked by releasing the hooking of the one second hook 65. Canceled. In this state, the operator pushes the carriage 18 and moves it from the slope portion 20 to the central portion of the cargo handling table 15. At that time, each caster 17 of the carriage 18 gets over the caster stopper plate 56 while stepping on the caster stopper plate 56 against the spring force of both the caster springs 58. Immediately after the stepping on, the caster stopper plate 56 projects from the opening 55 again by the spring force of the two caster springs 58. Thereby, the caster 17 is hooked on the caster stopper plate 56 and the carriage 18 is positioned on the cargo handling table 15.

  Next, when the cargo handling table 15 moves from the unloading position b to the unloading position c, the valve body of the two-way valve V2 is moved to the A side, while the valve body of the three-way valve V1 is moved to the B side. When the electric motor M is driven in this state and the oil pump P is operated, only the rod of the cargo handling cylinder 13A protrudes while the storage cylinder 13B is free of hydraulic pressure (FIGS. 9 and 10). As a result, the power shaft 22 and the auxiliary shaft 23 are further rotated forward by about 95 °, respectively, and accordingly, the power-side lifting operation arm 38 and the auxiliary-side lifting operation arm 38 are respectively rotated by approximately 95 °. Is done. At this time, the lifting operation arms 38 arranged one by one on both sides in the vehicle width direction are separated from each other in the vehicle width direction, and thus cannot be obtained by the conventional parallelogram link mechanism. The rotation angle, that is, the cargo handling table 15 can be rotated at an angle exceeding 180 ° from the storage position a to the unloading position c. In the first embodiment, such a rotation angle exceeding 180 ° is configured to be performed by the two cylinders of the cargo handling cylinder 13A and the storage cylinder 13B.

As a result, the cargo handling table 15 at the unloading position b gradually rises while drawing a circular arc without causing interference between the power raising / lowering operation arm 38 and the auxiliary side raising / lowering operation arm 38 during rotation. Thus, the unloading position c is substantially the same as the height of the upper surface of the floor plate of the loading platform 12. During the ascent, the power link 34 and the auxiliary link 42 gradually stand up. As a result, the hook return pins 39 of the two power links 34 come into contact with the edges of the first hooks 46 on the vehicle front side. Thereafter, as these rotations further proceed, the hook return pins 39 gradually raise the first hooks 46 around the hook connection shaft 48, and finally the springs of the springs 53 for both hooks. Due to the force, the corresponding hook stopper 47 and another stopper 49 come into contact with each other and the first hooks 46 stand up to the vertical position (FIGS. 11 to 16).
Further, the end of each auxiliary link 42 on the cargo handling table 15 side is a diagonally cut stopper portion 42 a that abuts the upper surface of the cargo handling table 15 at an inclination angle of about 60 °. Therefore, when the loading table 15 is moved from the unloading position b to the unloading position c, the loading table 15 is prevented from being tilted by the load of the carriage 18.

  When the cargo handling table 15 moves from the unloading position c to the unloading position b, the valve body of the two-way valve V2 is moved to the B side and the valve body of the three-way valve V1 is moved to the B side. At this time, the oil pump P is not operated. As a result, the cargo handling cylinder 13A becomes hydraulically free, and only the rod of the cargo handling cylinder 13A is pulled back (FIGS. 7 and 8). Accordingly, the power shaft 22 and the auxiliary shaft 23 are rotated in the opposite directions by about 95 °, respectively, and accordingly, the power-side lifting operation arm 38 and the auxiliary-side lifting operation arm 38 are only about 95 °. Each is rotated in reverse.

When the cargo handling table 15 reaches the unloading position b where the cargo is unloaded, the operator depresses the caster stopper plate 56, and in this state, both the second hooks 65 are raised and these are moved to the front ends of the latch rods 63. Hang. Accordingly, the caster stopper plate 56 is held in a state of being submerged in the opening 55 of the cargo handling table 15. As a result, there is no level difference on the upper surface of the cargo handling table 15, and the cargo bed 12 can be smoothly moved from the carriage 18 to the ground.
When the cargo handling table 15 is moved from the unloading position b to the storage position a, the valve body of the two-way valve V2 is moved to the B side, and the hydraulic oil in the oil tank 71 is moved into the storage cylinder by moving the valve body of the three-way valve V1. The hydraulic oil in the rod side hydraulic chamber of the storage cylinder 13 </ b> B is supplied to the head side hydraulic chamber of 13 </ b> B and is moved to the A side returning to the oil tank 71. As a result, the cargo handling cylinder 13A becomes hydraulically free, and only the rod of the storage cylinder 13B protrudes (FIGS. 5 and 6). As a result, the power shaft 22 and the auxiliary shaft 23 connected to the power shaft 22 reversely rotate by about 110 °. Along with this, the power-side lifting operation arm 38 and the auxiliary-side lifting operation arm 38 are reversely rotated by about 110 °, respectively, and the cargo handling table 15 at the grounded unloading position b is kept for a while (about 45 °). During rotation, the vehicle moves horizontally along the ground to the rear of the vehicle, and then the cargo handling table 15 rotates upward to reach the storage position a. At this time, the power links 34 and the auxiliary links 42 gradually tilt, and accordingly, the rollers 40 come into contact with the heads of the first hooks 46, and further resist them against the spring force of both hook springs. The roller 40 is gradually rotated (tilted), and finally each roller 40 is hooked on the corresponding first hook 46 (FIGS. 17 to 20).

Thus, by rotating the power arm 33 about the power shaft 22 by the rotation drive unit 13, the cargo handling table 15 is unloaded position c, unloading position b, and storage position a while maintaining the horizontal state. Are moved sequentially. As a result, it is possible to store the cargo handling table 15 under the floor of the loading platform 12 or to sequentially move the cargo handling table 15 from the under floor to the unloading position b and the unloading position c without human intervention.
Further, in the vicinity of the unloading position b, the cargo handling table 15 is grounded before the tips of the power arm 33 and the auxiliary arm 41 reach the lowest point, and thereafter, each lifting operation arm 38 is grounded while being bent forward for a while. Since it is configured to move horizontally as it is, even if the height of the floor surface of the loading platform 12 (the upper surface of the floor board on which the load is loaded) changes slightly, the cargo handling table 15 is always grounded at the unloading position b, The cargo handling table 15 can be sequentially moved between the unloading position c, the unloading position b, and the storage position a.
Furthermore, since the adjacent raising / lowering operation arms 38 are separated from each other in the vehicle width direction, the cargo handling table 15 can be rotated at an angle exceeding 180 ° from the storage position a to the unloading position c.

Further, since the roller 40 of the pin shaft 35 is configured to be hooked on the first hook 46 of the cargo handling table 15 when the cargo handling table 15 after grounding moves horizontally, the cargo handling table 15 is unloaded at the position b. When moving between the storage position a and the storage position a, the cargo handling table 15 can be prevented from fluttering, and each lifting operation arm 38 can be folded compactly and stored under the floor of the loading platform 12. Further, the turning radius of each lifting operation arm 38 can be reduced.
Since the two hydraulic cylinders of the cargo handling cylinder 13A and the storage cylinder 13B are used and the power arm 33 is rotated in two rotations at a rotation angle of less than 180 °, the hydraulic cylinder , The power arm 33 can be rotated in the range of about 270 ° around the power shaft 22.
As a power transmission mechanism between the power shaft 22 and the auxiliary shaft 23, a crank type as shown in FIGS. 27 to 29 may be adopted instead of the chain type. Thereby, compared with the chain-type thing which has the endless chain 26 which a slack generate | occur | produces, the highly accurate synchronous rotation of the power shaft 22 and the auxiliary shaft 23 can be enabled.

27 to 29, 80 is a cargo handling side arm whose base is fixed to the auxiliary shaft 23, 81 is pivotally supported at one end by a connecting shaft 31 on the cargo handling side arm 80, and the other end is a cargo handling side cylinder arm. 30 is a power rod that is pivotally supported at the tip of 30; 82 is a storage-side arm whose base is fixed to the auxiliary shaft 23; 83 is one end supported on the storage-side arm 82 by a connecting shaft 31; Is an auxiliary rod pivotally supported at the tip of the storage-side cylinder arm 32. The force for inserting and removing the rod of the cargo handling cylinder 13 </ b> A is transmitted from the power rod 81 to the auxiliary shaft 23 via the cargo handling side arm 80. In addition, the force for inserting and removing the rod of the storage cylinder 13 </ b> B is transmitted from the auxiliary rod 83 to the auxiliary shaft 23 through the storage side arm 82.
Other configurations, operations, and effects are in a range that can be estimated from the first embodiment, and thus the description thereof is omitted.
In addition, although the said Example demonstrated the example mounted in the loading platform of a vehicle, a lifter apparatus can also be mounted in the raising / lowering port of a vehicle. For example, to lift and lower the wheelchair. In this case, the table is housed in the lower floor portion of the elevator opening, and the table is rotated from the landing position to the vehicle floor surface height position to raise and lower the wheelchair and the passenger.

It is a side view which shows the accommodation state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a side view which shows the unloading state and unloading state of the cargo handling table of the vehicle lifter apparatus which concern on Example 1 of this invention. It is a side view which shows the horizontal movement state in the unloading state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is an enlarged plan view in the unloading position of the cargo handling table of the lifter device for vehicles concerning Example 1 of this invention. It is a front view which shows the accommodation state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a top view which shows the accommodation state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a front view which shows the unloading state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a top view which shows the unloading state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a front view which shows the unloading state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a top view which shows the unloading state of the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the latch release operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the latch release operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the latch release operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the latch release operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part enlarged plan view which shows the latch release state of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part enlarged plan view which shows the latching state of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the hooking operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the hooking operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the hooking operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part expanded side view which shows the hooking operation | work of the hook from the hook receiving part of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part enlarged plan view which shows the latch release state of the hook from the hook receiving part at the time of the loading platform lowering of the vehicle lifter apparatus which concerns on Example 1 of this invention. It is a side view which shows the state with which the trolley | bogie was mounted in the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. It is a principal part enlarged plan view which shows the attachment part vicinity of the caster stopper board in the cargo handling table of the vehicle lifter apparatus which concerns on Example 1 of this invention. It is a principal part expansion longitudinal cross-sectional view along the vehicle length direction which shows the attachment part vicinity of the caster stopper board in the cargo handling table of the vehicle lifter apparatus which concerns on Example 1 of this invention. It is a principal part expansion longitudinal cross-sectional view along the vehicle width direction which shows the attachment part vicinity of the caster stopper board in the cargo handling table of the lifter apparatus for vehicles which concerns on Example 1 of this invention. 1 is a hydraulic circuit diagram of a vehicle lifter device according to Embodiment 1 of the present invention. FIG. FIG. 3 is an enlarged side view of a main part illustrating a connection state of a rod of a cargo handling cylinder to a power shaft when a crank mechanism is employed as a power transmission mechanism between the power shaft and the auxiliary shaft of the vehicle lifter device according to the first embodiment of the present invention. is there. The principal part enlarged side view which shows the connection state to the power shaft of the rod of a storage cylinder, when a crank mechanism is employ | adopted as the power transmission mechanism of the power shaft and auxiliary shaft of the vehicle lifter apparatus which concerns on Example 1 of this invention. It is. When the crank mechanism is employed in the power transmission mechanism between the power shaft and the auxiliary shaft of the vehicle lifter device according to the first embodiment of the present invention, the connection state of the rod of the cargo handling cylinder to the auxiliary shaft and the power of the rod of the storage cylinder It is a principal part enlarged plan view which shows the connection state to the axis | shaft.

Explanation of symbols

10 Vehicle lifter device,
11 Truck (vehicle),
12 cargo bed,
13A cargo handling cylinder (rotation drive),
13B storage cylinder (rotation drive part),
14 arm rotation mechanism,
15 Handling table,
22 Power shaft (rotating shaft)
27 Cylinder frame (underfloor member),
33 Power arm (arm body),
34 Power link (arm tip),
35 pin shaft,
36 pivot axis,
38 Lifting operation arm,
40 Roller (hook receiving part),
41 Auxiliary arm (arm body),
42 Auxiliary link (arm tip),
46 First hook (hook).

Claims (4)

In a lifter device for a vehicle in which a table is provided in a horizontal state by using an arm turning mechanism having a turning drive unit at a vehicle bed or a lift, and the table is stored under the floor of the load bed or the lift. ,
The arm rotation mechanism has one end portion rotatably connected to the cargo bed or the underfloor member of the lift opening around the first rotation axis, and the other end portion connected to the table. A pair of elevating operation arms connected to be rotatable about a second rotation axis provided in parallel with the rotation axis of
The pair of lifting operation arms are separated in the axial direction of the first rotation shaft and also in a direction perpendicular to the axial line,
Each of the lifting and lowering operation arms has a structure in which an arm body on the underfloor member side and an arm tip on the table side are connected to each other around a pin shaft provided in parallel with the first rotation shaft, respectively.
The two arm bodies have the same turning radius around the first turning shaft on the respective underfloor member side at the respective tips, and these turning radii are the first on the underfloor member side from the ground. Shorter than the height to the axis of the rotation axis,
The lifter device for a vehicle, wherein the both arm tip portions have the same turning radius around each pin shaft at the tip. A lifter device for a vehicle in which a cargo handling table is provided in a horizontal state using an arm pivoting mechanism having a pivoting drive unit at a rear portion of a vehicle bed so that the cargo handling table can be raised and lowered in a horizontal state, and the cargo handling table is stored below the floor of the cargo bed.
The arm rotation mechanism has one end portion rotatably connected to the underfloor member of the cargo bed around the rotation axis whose axis is directed in the vehicle width direction, and the other end portion to the cargo handling table. It has a pair of lifting operation arms that are pivotally connected around another rotation shaft with the axis line oriented in the vehicle width direction. The pair of lifting operation arms are spaced apart in the vehicle width direction and Separated in the long direction,
Each of the lifting operation arms has a structure in which an arm main body on the underfloor member side and an arm tip on the cargo handling table side are connected to each other so as to be rotatable around a pin shaft whose axis extends in the vehicle width direction.
The two arm bodies have the same turning radius around the turning shaft on the respective under-floor member side at their tips, and these turning radii are the axis of the turning shaft on the under-floor member side from the ground. Shorter than the height of,
The lifter device for a vehicle, wherein the both arm tip portions have the same turning radius around each pin shaft at the tip. One end of the pin shaft of the lifting operation arm is extended and exposed, and a hook receiving portion is provided on the exposed portion,
The vehicle according to claim 2, wherein a hook for hooking the hook receiving portion is provided on the cargo handling table when the cargo handling table is grounded and the lifting operation arm is folded in two around the pin shaft. Lifter device. The rotation angle of each arm body is 1 ° to 360 °.
The said rotation drive part has the several hydraulic cylinder which divides | segments at least one said arm main body in multiple times by the rotation angle of less than 180 degrees for 1 time. The vehicle lifter device according to any one of claims 3 to 4.

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