JP2012006454A - Load platform lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load platform lifting device capable of completely and easily regulating lifting operations of a load platform immediately after its standing operation by automatically switching the load platform from a horizontal state to a standing state.SOLUTION: The load platform lifting device includes: columns 2 installed on the right and left of a rear part of a vehicle in a standing manner; sliders liftably mounted in the columns 2; and a load platform 1 that is pivoted to the sliders to change its posture between a horizontal state and a standing state. An engaging part capable of ingress into and egress from a base end is disposed on the side of the load platform 1. Moreover, an arm member having an engaged part engaging with the engaging part is disposed on a vehicle body frame of the vehicle. By the engagement of the engaging part with the engaged part, a posture of the load platform is changed to its standing state. On each of the columns 2, a protruding part 21 protruding along a vehicle width direction is disposed. On the load platform 1, an abutment part 11 that abuts on the protruding part 21 from downward under a standing state. The abutment part 11 has an extension part 11a extending from the base end side to the front end side of the load platform 1.

Description

  The present invention relates to a load receiving table lifting apparatus that automatically raises a load receiving table that can be moved up and down in the vertical direction.

  As a load receiving platform lifting device for loading and unloading a load between the loading platform and the ground at the rear of the vehicle, as shown in FIG. There is a slider 92 that is movable, and a load receiving base 93 that is pivotally attached to a portion 92a of the slider 92 that protrudes from a notch 91a on the rear wall of the column 91. The slider 92 uses a hydraulic cylinder (not shown) in a cross member 94 installed between the columns 91 as a drive source, and is connected via a wire 95 having one end connected to the hydraulic cylinder and the other end fixed to the slider 92. Is moved up and down. The load receiving stand 93 is stored in a standing state when not in use (such as when the vehicle is running), and is lifted by changing the posture of the load receiving stand 93 to a horizontal state at a predetermined height when in use. .

  When changing the posture of the load receiving stand 93 from the horizontal state to the standing state, there is a configuration in which the operator lifts the load receiving stand 93 by hand. A configuration in which the posture of the table 93 is automatically changed from a horizontal state to a standing state has been proposed (Patent Document 1). As shown in FIG. 5 (b), this configuration includes an arm member 96 that is connected to a pair of left and right vehicle body frames extending in the longitudinal direction of the vehicle and is rotatable, and a hook that is movable in and out of the base end side of the load receiving platform 93. Member 97. When the load receiving base 93 is raised with the hook member 97 protruding (arrow A91), the hook member 97 engages with an engagement pin provided at the tip of the arm member 96. Since the load receiving table 93 continues to rise as it is, the arm member 96 rotates rearward (arrow A93), and the load receiving table 93 stands up so as to be pulled by the rising slider 92 (arrow A92). The structure of standing up automatically has a great effect in terms of quickness of operation because it becomes difficult to lift it directly by hand particularly in the case of the load receiving stand 93 having a large length L.

JP 2001-071808 A

  Since the automatic switching to the rotation operation of the load receiving table uses the lifting operation of the slider 92, after the load receiving stand 92 stands up, the load receiving stand 93 is raised again while standing. Therefore, in order to restrict the ascending operation, a rectangular member 99 whose longitudinal direction is the vehicle width direction on the rear wall of the support column 91 and a side triangular contact portion 98 that contacts the rectangular member 99 when the load receiving table 93 stands up. And are provided.

  However, since the slider 92 is simply raised and the load receiving platform 93 is rotated (arrow A921), a large impact force is generated when the standing posture is reached, and in the opposite direction (arrow A922) immediately after standing by the reaction. Will swing. Therefore, the contact member 98 gets over without contacting the rectangular member 99, and there is a possibility that the raising operation of the load receiving table 93 cannot be regulated. In particular, when the length L of the load receiving stand 93 is large, the turning radius indicated by the arrow A92 of the load receiving stand 93 is increased. That is, since the swinging range of the load receiving table 93 is increased, it is difficult to restrict the raising operation.

  Therefore, it is not preferable to incorporate a mechanism for controlling the rotation speed of the load receiving table 1 so that the load receiving table 93 does not swing, since the cost is significantly increased. Further, when the load receiving table 93 is raised until the swing of the load receiving table 93 converges, and then the rectangular member 99 is provided at a position where the load receiving table 93 can come into contact with the contact portion 98, the other members disposed in the support column 91 are provided. This is not preferable because it causes interference with the member.

  The present invention has been made in view of the above problems, and in a configuration in which the load receiving table is automatically switched from the horizontal state to the standing state, the load receiving table capable of reliably and easily regulating the ascending operation of the load receiving table immediately after rising. The purpose is to provide a lifting device.

  Posts erected on the left and right sides of the rear part of the vehicle loading platform, a slider mounted so as to be movable up and down in the column, and a load receiving platform pivoted on the slider and capable of changing its posture between a horizontal state and a standing state And an engaging portion that can freely enter and exit on the base end side is arranged on the side portion of the load receiving platform, and an engaged portion that can be engaged with the engaging portion is provided on the vehicle body frame of the vehicle. An arm member having a load receiving platform lifting device in which the posture of the load receiving platform is changed to an upright state by the engagement between the engaging portion and the engaged portion. A projecting portion that projects along the vehicle width direction is disposed, and the load receiving table is disposed with a contact portion that contacts the projecting portion from below when standing, and the contact portion is It shall have the extension part extended toward the front end side from the base end side of the said load receiving stand.

  The extension part is provided at a vehicle front side end part of the contact part when the load receiving stand is in a standing state. The extending portion may have a tapered surface at a distal end, and the tapered surface may face the load receiving table and be inclined toward the base end side of the load receiving table. Further, the contact portion may be configured to be provided with a groove portion that is adjacent to the load receiving table side of the extending portion and is recessed on the proximal end side of the load receiving table.

  In addition, the pillars erected on the left and right sides of the rear part of the loading platform of the vehicle, the slider attached to the pillar to be raised and lowered, and pivotally attached to the slider, the posture can be changed between the horizontal state and the standing state. An engaging portion that is freely movable in and out of the base end side, and a vehicle body frame of the vehicle that is engageable with the engaging portion. An arm member having a portion is arranged, and a load receiving table lifting device in which a posture change of the load receiving stand to an upright state is performed by engagement of the engaging portion and the engaged portion. Is provided with an extending portion that extends along the vehicle longitudinal direction and has a shape in which a tip end portion thereof is bent downward, and the load receiving platform is configured to be extended from below with respect to the extending portion in a standing posture. A projecting part that contacts is arranged, and the projecting part is located outward at a side edge of the load receiving platform. Or as having a protruding shape.

  According to the present invention, the contact portion provided on the load receiving platform has the extending portion extending toward the distal end side, so that when the load receiving platform is in the standing state, the extending portion is It enters the front and prevents the cradle from swinging backward. Thereby, a contact part can be made to contact | abut reliably to a protrusion part, and it can control that the load receiving stand in a standing state raises further.

It is a side view which shows raising / lowering of the horizontal load receiving stand with the load receiving stand raising / lowering apparatus which concerns on this embodiment. It is a side view which shows the load receiving stand stored in the standing state by the load receiving stand raising / lowering apparatus which concerns on this embodiment. It is a side surface schematic diagram which shows that the load receiving base which concerns on this embodiment is raise-regulated at the time of standing. It is a side surface schematic diagram which shows that the load receiving base which concerns on another embodiment is raise-regulated at the time of standing. It is the perspective view and side surface schematic diagram which show the cargo receiving stand raising / lowering apparatus which concerns on a prior art form.

An embodiment of a cargo receiving platform lifting apparatus according to the present embodiment will be described with reference to the drawings.
FIG. 1 is a side view showing a load receiving table lifting / lowering device 100 provided at the rear of the vehicle and provided with an automatic erection mechanism of the load receiving stand 1.

  The vehicle including the device 100 includes a main frame F that is a pair of left and right body frames extending in the vehicle front-rear direction, and a subframe FS provided on the main frame F. A floor portion BF of the loading platform B is disposed on the subframe FS. And the loading platform raising / lowering apparatus 100 is provided in the rear end part of this loading platform B. As shown in FIG.

  The load receiving platform lifting device 100 includes a post 2 as a pair of pillars standing up and down at the rear of the vehicle, and a sub post 3 inserted into the post 2 via upper and lower rollers 31 and 32 so as to be slidable in the vertical direction. The slider 4 that slides in the vertical direction through the upper and lower rollers 41 and 42 in the sub post 3, the load receiving table 1 pivotally attached to the slider 4, and the lifting device 5 that lifts and lowers the load receiving table 1, And an automatic standing device 6 for automatically raising the cargo receiving stand. By using the load receiving table lifting device 100, it is possible to easily load and unload the load between the floor portion BF and the ground G.

  The slider 4 has a slider protrusion 4 a that protrudes rearward through a notch groove (not shown) that is provided on the rear wall of each of the post 2 and the sub post 3 and extends in the vertical direction. When the sub post 3 does not contact the ground G, the sub post 3 is held in a suspended state by the slider 4. When the sub post 3 contacts the ground G, the slider 4 is allowed to move downward.

  The load receiving platform 1 is pivotally attached to the slider protrusion 4a via a pin 40 in a state of being supported so as to be rotatable between a horizontal state and a standing state. Therefore, the load receiving platform 1 is also raised and lowered with the raising and lowering operation of the slider 4. A plate member 11 is disposed on each of both side portions on the front end side of the load receiving platform 1 for restricting the rising operation when standing. Although not shown in FIG. 1, pins that protrude in the facing direction are provided on the mutually facing surfaces of the pair of left and right posts 2 (inner side in the vehicle width direction), and the plate member 11 is placed on the pins from below. It is the structure which engages.

  The lifting device 5 includes a hydraulic cylinder (not shown) disposed in a cross member (not shown) installed between the left and right posts 2, one end connected to the hydraulic cylinder, and the other end fixed to the slider 4. And a pulley 52, 53, etc. around which the wire 51 is wound. As a result, when the hydraulic cylinder is extended, the wire 51 is drawn and the slider 4 is moved upward, and when the hydraulic cylinder is contracted, the wire 51 is drawn out and the slider 4 is moved downward.

  The automatic standing device 6 includes a slidable load receiving side arm member 61 disposed on both sides of the load receiving stand 1 and a vehicle side arm member 62 rotatably supported at the rear end of the main frame F. These arm members 61 and 62 function as engaging members and engaged members, so that the load receiving platform 1 is automatically switched from the horizontal state to the standing state (the posture is changed). The load receiving table side arm member 61 is housed in a slidable (in / out) state so as to protrude or be accommodated with respect to the base end portion 1 a of the load receiving table 1. The slide of the load receiving table side arm member 61 is performed by the operator's gripping operation of the handle portion 7 protruding to the side of the base end portion 1a. A long hole-shaped notch 10a is provided on the side of the base end 1a, and the handle portion 7 protrudes through the notch 10a. At one end of the notch 10a (the front end side of the load receiving platform 1), a rotatable plate 71 is arranged with its end pivotally supported by a pin 701. The plate 71 is provided with a semicircular cutout portion 71a for restricting the sliding operation of the handle portion 7. When the cutout portion 71a is fitted to the shaft portion of the handle portion, the handle portion 7 is operated. I can't do that. The load receiving side arm member 61 is provided with an L-shaped hook member 63. When performing a loading / unloading operation (raising and lowering the load receiving platform 1), the load receiving platform side arm member 61 is housed in the base end 1a and is not engaged with the vehicle side arm member 62. When the cargo loading / unloading operation is completed and the load receiving platform 1 is stood and stored, the load receiving platform side arm member 61 protrudes from the base end portion 1a so as to be engaged with the vehicle side arm member 62. .

  The engagement between the load receiving side arm member 61 and the vehicle side arm member 62 will be specifically described with reference to FIG. FIG. 2A shows the standing state of the cargo receiving stand 1. The load receiving table side arm member 61 protrudes from the base end portion 1a of the load receiving table 1, and the handle portion 7 is close to the load receiving table base end portion 1a side of the notch portion 10a. The hook member 63 at the tip of the load receiving side arm member 61 is engaged with the vehicle side arm member 62, and the vehicle side arm member 62 is in a substantially horizontal state. When the load receiving stand 1 is automatically erected, the load receiving stand side arm member 61 is projected in advance as shown in FIG. 2B (arrow A1). If it raises to a predetermined position, the hook member 63 and the vehicle side arm member 62 will engage. The vehicle-side arm member 62 is provided with an engagement pin 62a at the tip thereof so as to be detachably engaged with the hook member 63. The vehicle-side arm member 62 is configured to urge the engagement pin 62a toward the vehicle front side by a spring (not shown), and the engagement pin 62a and the hook are engaged by the urging force of the spring and the lift of the load receiving platform 1 or the like. The engaged state with the member 63 is not released.

  Thus, if the raising operation of the load receiving platform 1 continues while the engagement state of the engagement pin 62a and the hook member 63 is maintained, the vehicle-side arm member 62 rotates to the vehicle rear side. On the other hand, since the slider 4 (protruding portion 4a of the slider 4) rises in the same straight line in the substantially vertical direction, the load receiving side arm member 61 and the vehicle side arm member 62 are V-shaped around the engaging pin 62a. The cargo receiving platform 1 rotates (arrow A2) to the front side of the vehicle. Thus, the load receiving platform 1 is automatically switched from the ascending operation to the rotating operation. Further, when the slider 4 continues to move up, the load receiving stand 1 is in an upright state (arrow A3).

  The plate member 11 on the front end side of the load receiving platform 1 comes into contact with the projecting portion 21 against the pin-shaped projecting portion 21 projecting inward in the vehicle width direction above the column 2 when the standing state is established. By abutting as a portion, the cargo receiving platform 1 is restricted from further rising. Specifically, first, as shown in FIG. 3A, the load receiving platform 1 is rotated and the abutting portion 11 is located in a state of being close to the projecting portion 21. At this time, the load receiving platform 1 is in an upright state (solid line portion) substantially parallel to the post 2. Then, the rotation operation (arrow A3) of the load receiving platform 1 is switched to the ascending operation (arrow A4), and the load receiving platform 1 immediately rises as shown in FIG. The plate member 11 has an extended portion 11a in which an outermost edge portion (a side portion that is the front side of the vehicle when the load receiving platform 1 is in a standing state) extends to the front end side of the load receiving table 1, and the extension The portion 11a enters the vehicle front side of the protruding portion 21. That is, the extended portion 11a is positioned in front of the protruding portion 21 in the vehicle before the rising of the plate member 11 is regulated by the protruding portion 21 (while the load receiving platform 1 is rising), or is in contact with the protruding portion 21. It becomes a state to do. Thereby, since the movement of the extension part 11a to the vehicle rear side is restricted by the protruding part 21, the load receiving platform 1 does not swing to the vehicle rear side. As a result, as shown in FIG. 3C, the plate member 11 and the protruding portion 21 come into contact with each other, and the lifting operation of the load receiving platform 1 is reliably stopped.

  The plate member 11 has a tapered surface 11c at the distal end portion 11b of the extending portion 11a and a groove portion 11e that is recessed in a substantially semicircular shape at an adjacent portion 11d of the extending portion 11a. The tapered surface 11c has a shape in which the width on the front end side becomes narrower at the edge portion close to the load receiving table 1, that is, a shape that inclines toward the rear of the vehicle as it goes downward when the load receiving table 1 is in a standing state. By having the taper surface 11c, the extending portion 11a can easily enter the front side of the projecting portion 21 even when the standing cradle 1 in the standing state swings rearward of the vehicle. In addition, since the extension part 11a is extended, while being guided by the extension part 11f and being able to raise the load receiving base 1 stably until the protrusion part 21 contacts the groove part 11e, it protrudes into the groove part 11e. Even after the portion 21 comes into contact, the protruding portion 21 is unlikely to come off to the rear of the vehicle.

  As described above, in the present embodiment, the plate member 11 provided on the front end side of the load receiving platform 1 and having the extending portion 11a and the protruding portion 21 provided on the vehicle inner side and protruding toward the upper side of the post 1 are reliably provided. However, the arrangement and configuration of the plate member 11 and the protruding portion 21 are not limited to this, and other configurations may be used.

  For example, regarding the extending portion 11a, the outermost edge portion of the plate member 11 is used. However, the central portion may be extended or the innermost edge portion may be extended. The extending direction of the extending part 11a is also parallel to the placement surface of the load receiving table (substantially vertical when the load receiving table 1 is in a standing state), but extends in an inclined direction away from the load receiving table 1. The shape to be used may be used. If it extends incline, there exists an effect which becomes easy to enter the vehicle front of the protrusion part 21. FIG. As for the shape of the groove 11e, a rectangular shape or the like may be used corresponding to the shape of the protrusion 21 as appropriate.

  Further, by providing the plate member 11 and the front end side of the load receiving platform 1 and providing the protruding portion 21 above the post, the plate member 11 is prevented from interfering with other members during the rotation operation of the load receiving platform 1. However, when interference with these members can be avoided, the plate member 11 can be provided on the base end side or near the central portion of the load receiving base 1 so that it can abut the plate member 11 on the protruding portion 21. It may be provided at any position. In particular, if the plate member 11 can be provided on the base end side, when the load receiving platform 1 swings to the rear side of the vehicle, the swing range becomes smaller toward the rotation center side. It is preferable because contact is easy.

  When the width of the load receiving stand 1 is larger than the distance between the pair of left and right posts 2, the projecting portion 21 is configured to project outward from the post 2 in the vehicle width direction and is configured to contact the plate member 11. It doesn't matter. Note that the protruding portion 21 may be configured to freely enter and exit from the post 2. In addition, the plate member 11 and the protruding portion 21 serving as the contact portions are provided on the left and right sides of the vehicle, but may be provided on only one of them.

  In addition, as shown in FIG. 4, the load receiving platform 1 is provided with a pin 111 protruding outward from the side edge along the vehicle width direction, and the post 2 extends from the rear wall to the rear of the vehicle. It can also be set as the structure in which the plate member 211 was provided. The plate member 211 has a front end portion 211a bent downward, and the pin 111 enters the vehicle front side of the front end portion 211a of the plate member 211 immediately after the load receiving platform 1 is in an upright state. Thereby, it can prevent that the goods receiving stand 1 rock | fluctuates back.

  INDUSTRIAL APPLICABILITY The present invention is useful as a lashing device for a load receiving table lifting / lowering device whose operation direction is switched.

1 Receiving platform 2 Post (post)
3 Sub-post 4 Slider 5 Lifting device 6 Automatic standing device 11 Plate member (contact portion)
21 Protruding part 61 Load receiving side arm member (engaging part)
62 Vehicle-side arm member (engaged part)
11a Extension part 11c Tapered surface 11e Groove part 111 Pin (protrusion part)
211 Plate member (contact part)

Claims (5)

Posts erected on the left and right sides of the rear part of the vehicle loading platform, a slider mounted so as to be movable up and down in the column, and a load receiving platform pivoted on the slider and capable of changing its posture between a horizontal state and a standing state And
An engagement portion that can freely enter and exit on the base end side is disposed on the side portion of the load receiving platform, and an arm member having an engaged portion that can be engaged with the engagement portion is disposed on the vehicle body frame of the vehicle. A load receiving platform lifting device in which the posture change to the standing state of the load receiving platform is performed by the engagement between the engaging portion and the engaged portion,
The strut is provided with a protruding portion that protrudes along the vehicle width direction,
The load receiving platform is provided with an abutting portion that abuts against the projecting portion from below when standing.
The said contact part has an extension part extended toward the front end side from the base end side of the said load receiving stand. The load receiving stand raising / lowering apparatus characterized by the above-mentioned. The said extension part is provided in the vehicle front side edge part in the said standing part in the said standing part in the said contact part. The load receiving base raising / lowering apparatus of Claim 1 characterized by the above-mentioned. The extension has a tapered surface at the tip,
2. The load receiving table elevating device according to claim 1, wherein the tapered surface has a shape that faces the load receiving table and is inclined toward a base end side of the load receiving table. The said contact part is provided with the groove part which is dented in the base end side of the said load receiving stand while adjoining the said load receiving stand side among the said extension parts. The load receiving stand of Claim 1 characterized by the above-mentioned. lift device. Posts erected on the left and right sides of the rear part of the vehicle loading platform, a slider mounted so as to be movable up and down in the column, and a load receiving platform pivoted on the slider and capable of changing its posture between a horizontal state and a standing state And
An engagement portion that can freely enter and exit on the base end side is disposed on the side portion of the load receiving platform, and an arm member having an engaged portion that can be engaged with the engagement portion is disposed on the vehicle body frame of the vehicle. A load receiving platform lifting device in which the posture change to the standing state of the load receiving platform is performed by the engagement between the engaging portion and the engaged portion,
The column is provided with an extending portion that extends along the vehicle front-rear direction and has a shape in which a tip portion thereof is bent downward,
The load receiving platform is provided with a protruding portion that comes into contact with the extension portion from below when in a standing posture,
The projecting portion has a shape projecting outward at a side edge portion of the load receiving table.

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