JP4071503B2 - Slide synchronization mechanism of the load receiving platform in the retractable load receiving platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable load receiving device lifting device in which a load receiving platform is configured to be slidable between a storage position below the loading platform and a work position behind the loading platform, and more specifically, a slide synchronization mechanism for sliding the load receiving platform. It is about.
[0002]
[Prior art]
Conventionally, a loading platform is provided on the loading platform via a link mechanism so as to be movable up and down by a lift cylinder, and the loading platform is moved downward along the pair of left and right guide rails by an actuator such as a slide cylinder via a pair of left and right mounting members. There is provided a retractable cradle lifting and lowering device configured to be slidable between a storage position and a work position behind the cargo bed.
[0003]
[Problems to be solved by the invention]
However, in the case where the load receiving table is slid back and forth along the pair of left and right guide rails via the pair of left and right mounting members as in the conventional case, friction or dust generated between the left and right mounting members and each guide rail Due to the above, if a difference in resistance occurs between the left and right mounting members, the slide causes a shift in the front-rear direction, and if the left and right mounting members are shifted back and forth in this way, a smooth sliding operation becomes difficult. As a result, it is necessary to correct the displacement of the left and right mounting members, resulting in a decrease in workability, and it may become stuck in the middle of the slide and stop and move, causing damage to peripheral members such as mounting members. was there.
[0004]
The present invention has been made in view of the above-described problems, and an object of the present invention is to smoothly slide the load receiving table by synchronizing the sliding operation of the left and right mounting members with respect to the pair of left and right guide rails. An object of the present invention is to provide a slide receiving mechanism for a load receiving table in a retractable load receiving table lifting device.
[0005]
[Means for Solving the Problems]
The slide synchronization mechanism of the load receiving platform in the retractable load receiving platform lifting and lowering device according to claim 1 is provided such that the load receiving platform is provided on the loading platform so as to be movable up and down by lifting means, and the load receiving platform is connected to the left and right mounting members by an actuator. in retractable receiving platform lifting device slidably configured back and forth between a storage position of the loading platform downward along the pair of guide rails and the bed behind the working position, the actuator is a single slide cylinder In addition, two sets of synchronous ropes acting on each of the pushing and pulling over the mounting member and the guide rail are wound symmetrically, and by the expansion and contraction operation of the slide cylinder arranged in the width direction, through the tuning rope body is tuned to the right and left mounting member is of even Before moving back and forth along the guide rail.
[0006]
The slide synchronizing mechanism of the load receiving platform in the retractable load receiving elevator apparatus according to claim 2 is composed of two sets of tuning cords that act on each of the pushing and pulling, and these two sets of tuning cords. The body is wound symmetrically around the mounting member and the guide rail.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 shows a schematic configuration of a retractable cargo receiving table lifting device.
[0009]
In FIG. 1, reference numeral 1 denotes a loading platform mounted on a vehicle frame 11, and a retractable loading platform elevating device 2 is provided below the rear end of the loading platform 1.
[0010]
The retractable load receiving table lifting / lowering device 2 includes an attachment member 3 provided on the vehicle frame 11 and a load receiving stand 5 provided on the attachment member 3 via a link mechanism 4.
[0011]
The mounting member 3 is slidable in the front-rear direction along an outward U-shaped slide rail 12 disposed in the front-rear direction at the rear end of the vehicle frame 11. Specifically, the front and rear rollers 31, 31 provided above the mounting member 3 are disposed so as to be able to roll within the slide rail 12, and the mounting member 3 is manually or by appropriate moving means described later. By sliding along the slide rail 12, the entire retractable load receiving device lifting device 2 is configured to be movable back and forth below the floor surface of the load carrier 1.
[0012]
A drive shaft 6 is supported on the mounting member 3 substantially horizontally. A base end portion of a drive arm 61 is integrally fixed to the drive shaft 6, and a distal end of a telescopic rod 62 a of a lift cylinder 62 provided on the mounting member 3 is connected to the distal end portion of the drive arm 61.
[0013]
Further, the drive shaft 6 is integrally provided with a base end portion of a rotation bracket 63, and a base end portion of a lift link 41 described later is pivotally supported at an intermediate portion of the rotation bracket 63.
[0014]
The link mechanism 4 includes a lift link 41 and a connecting link 42.
[0015]
The lift link 41 has a base end portion pivotally supported by a pivot 41 a in the middle of the rotating bracket 63.
[0016]
A contact bolt 64 provided at the distal end of the rotating bracket 63 is configured to be able to contact the lower surface of the lift link 41 near the base end portion. By abutting on the part closer to the end from below, the expansion / contraction operation of the lift cylinder 62 can be transmitted to the lift link 41 as the rotation operation of the rotation bracket 63 via the drive arm 61 and the drive shaft 6. As a result, the lift link 41 rotates up and down.
[0017]
The base end of the connecting link 42 is pivotally supported on the mounting member 3 by a pivot 42a.
[0018]
A pair of left and right members such as the slide rail 12, the mounting member 3, the link mechanism 4, and the drive shaft 6 described above are provided on both sides of the vehicle frame 11, and the left and right mounting members 3 are connected by a connecting member 3a.
[0019]
The load receiving platform 5 includes a distal end side member 51 and a proximal end side member 52, and the distal end side member 51 and the proximal end side member 52 are separated from each other by an upper hinge 53. The upper surface of 52 can be folded in two.
[0020]
On the left and right sides of the base end portion of the base end side member 52, the tip ends of the left and right connecting links 42 are pivotally supported by pivots 42 b on the upper portions thereof via brackets 54, and the tips of the left and right lift links 41 are located below the lower ends. The part is pivotally supported by the pivot 41b.
[0021]
Also, the tip of the tip side member 51 is formed in a wedge shape, and when the load receiving platform 5 reaches the ground, it tilts as shown by a one-dot chain line in FIG. Has been made.
[0022]
By the way, as described above, the left and right mounting members 3 connected by the connecting member 3a include the tuning mechanism 7 which forms the main part of the present invention and the mounting member 3 through the tuning mechanism 7 as shown in FIG. A slide cylinder 8 is provided as a moving means for sliding along the guide rail 12.
[0023]
The tuning mechanism 7 is composed of two pairs of tuning wires 71 and 72 acting as push and pull of the left and right attachment members 3, and the respective tuning wires 71 and 72 are stretched as follows. ing.
[0024]
One tuning wire 71 is fixed to the front end (left end in FIG. 2) of one mounting member 3 whose one end is the upper side in FIG. 2, and the middle portion is guided forward (left in FIG. 2). After that, it is wound around a sheave 73 provided at the upper part of the front end of one guide rail 12 and folded back, guided to the rear of one mounting member 3, and then wound around a sheave 74 to be wound on the other mounting member 3. The other attachment member 3 is wound around a sheave 75 provided behind the other attachment member 3, and the other end is fixed to the rear end of the other attachment member 3.
[0025]
The other tuning wire 72 is stretched symmetrically with the one tuning wire 71. That is, the other tuning wire 72 is fixed to the front end (the left end in FIG. 2) of the other mounting member 3 whose one end is the lower side in FIG. 2, and the middle part is forward (left in FIG. 2). After being guided, it is wound around a sheave 76 provided on the upper front end of the other guide rail 12 and folded back, and after being guided to the rear of the other mounting member 3, it is wound around a sheave 77 Guided behind the mounting member 3 and wound around a sheave 78 provided behind the one mounting member 3, the other end is fixed to the rear end of the one mounting member 3.
[0026]
The above-described sheaves 74, 75, 77, and 78 are rotatably supported on the upper portion of the support member 13 that is installed between the left and right guide rails 12, for example.
[0027]
The slide cylinder 8 is arranged in the front-rear direction, the base end portion is connected to the vehicle body 11 side, and the distal end of the telescopic rod 81 is connected to the front portion of the connecting member 3a. The slide cylinder 8 may be attached by connecting the base end to the connecting member 3a and the tip of the telescopic rod 81 to the vehicle body 11 side, contrary to the above.
[0028]
The retractable load receiving device lifting / lowering device 2 configured as described above is stored in such a manner that the mounting member 3 is slid to the front end portion of the slide rail 12 in a state where the load receiving stand 5 is folded by the expansion / contraction operation of the slide cylinder 8 described above. The position (see FIG. 1) A and the load receiving platform 5 that is folded by sliding the mounting member 3 to the rear end of the slide rail 12 are expanded so that the distal end side member 51 and the proximal end side member 52 are horizontal. The unfolding / folding position (see FIG. 3) B for folding the unfolded load receiving platform 5 and the load receiving platform 5 in a state of being unfolded by sliding the mounting member 3 to the middle position of the slide rail 12 It can be arranged at a work position (see FIG. 4) C that moves up and down between the floor and the like.
[0029]
Next, the operation of the above-described retractable load receiving table lifting device will be described.
[0030]
First, as shown in FIG. 1, when a cargo loading / unloading operation is performed by the retractable load receiving device lifting / lowering device 2 disposed at the storage position A, the slide cylinder 8 is extended to operate the mounting member 3 on the slide rail 12. By sliding from the front end portion to the rear end portion, the retractable load receiving device elevating device 2 is disposed at the unfolding / folding position B shown in FIG.
[0031]
Subsequently, the distal end side member 51 of the load receiving tray 5 folded at this position is rotated rearward so that the proximal end side member 52 and the distal end side member 51 are deployed horizontally. Thereafter, the mounting member 3 is slid forward from the rear end portion of the slide rail 12 with the slide cylinder 8 retracted, and is placed at the work position C shown in FIG. As a result, the load receiving platform 5 can move up and down between the ground and the floor of the loading platform 1 by the expansion and contraction operation of the lift cylinder 62, and the lifting and lowering operation allows the load receiving platform 5 to move between the ground and the loading platform 1 through the load receiving platform 5. Perform unloading work.
[0032]
When the load unloading operation is completed and the retractable load receiving device lifting device 2 is stored, the retractable load receiving device lifting device 2 is arranged at the storage position A by the operation reverse to the operation described above. That is, the retractable load receiving table lifting / lowering device 2 is temporarily arranged from the working position C to the unfolding / folding position B, the front end side member 51 of the load receiving stand 5 is folded at this position, and the mounting member 3 is folded. Is slid from the rear end portion of the slide rail 12 to the front end portion, and the retractable load receiving device elevating device 2 is disposed at the storage position A.
[0033]
In this way, when the load receiving platform 5 is slid and arranged at each position by the expansion and contraction operation of the slide cylinder 8, the left and right attachment members 3 are guided by the action of the two sets of tuning wires 71 and 72 constituting the tuning mechanism 7. It slides in synchronism with each other without shifting back and forth with respect to the rail 12. Thereby, the load receiving platform 5 can be smoothly slid through the mounting member 3 by the expansion and contraction operation of the slide cylinder 8.
[0034]
Further, by providing the tuning mechanism 7 described above, the slide cylinder is not at the center position of the connecting member 3a, but at a position shifted to the left or right as shown by a one-dot chain line in FIG. 2 (indicated by reference numeral 8 '). Even if it is provided to the vehicle, the receiving mechanism 5 can be smoothly slid through the mounting member 3 by the synchronization mechanism 7, thereby increasing the degree of freedom of the mounting position of the slide cylinder 8, and the retractable receiving platform lifting device 2 can be attached to the vehicle. Restrictions on installation can be relaxed.
[0035]
Further, the tuning mechanism 7 is not limited to connecting the slide cylinder 8 to the connecting member 3a as described above, but also by directly moving one of the tuning wires 71 or 72 by the expansion / contraction operation of the slide cylinder 8. The load receiving platform 5 can be moved smoothly while synchronizing the mounting member 3.
[0036]
As a result, the slide cylinder can be arranged in the width direction (indicated by reference numeral 8 ″) as shown by a two-dot chain line in FIG. The degree of freedom can be further increased, and the restrictions in installing the retractable load receiving device lifting device 2 on the vehicle can be further relaxed.
[0037]
In the present embodiment, the slide cylinder 8 is taken as an example of the moving means. However, the moving means is not limited to the slide cylinder 8, and an appropriate actuator such as a motor may be used, or the load receiving table may be manually operated. 5 may be slid.
[0038]
Further, in the present embodiment, the description has been given of the case where the load receiving platform 5 is slid and arranged at the three positions of the storage position, the unfolding / folding position, and the work position. It may be arranged to slide at one position.
[0039]
Furthermore, in the present embodiment, a set of striated bodies is configured by one continuous wire, but a set of striated bodies may be configured by connecting two wires by a link or the like. Any continuous striatum that can achieve the synchronized action. In addition, as a rope body, not only a wire but a rope, a chain, etc. are included.
[0040]
Further, in the present embodiment, the load receiving table elevating device that elevates and lowers the load receiving table by the link mechanism has been described. However, the elevating means of the load receiving table is not limited to this, and the load receiving table of the mechanism that slides the mounting member along the guide rail. The present invention can be applied to all lifting devices.
[0041]
【The invention's effect】
As described above, according to the slide receiving mechanism of the load receiving table in the retractable load receiving apparatus of the present invention, the two sets of the tuning cords acting on the pulling and pulling over the mounting member and the guide rail are symmetrically provided. the by arranging the winding, while tuning the left and right mounting member can be moved along the guide rails, can be to smoothly slide the load cradle through the mounting member. Moreover , the freedom degree of the attachment position of one slide cylinder can be raised, and the restriction | limiting at the time of installing a retractable load receiving stand raising / lowering apparatus to a vehicle can be eased.
[Brief description of the drawings]
FIG. 1 is a side view showing a retractable load receiving table lifting device disposed in a storage position.
FIG. 2 is a plan view showing a configuration of a slide synchronization mechanism.
FIG. 3 is a side view showing a retractable load receiving table lifting device arranged at an unfolded / folded position.
FIG. 4 is a side view showing a retractable load receiving table lifting device disposed at a work position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Loading platform 12 Guide rail 2 Retractable loading platform elevating device 3 Mounting member 5 Loading platform 7 Tuning mechanism 71, 72 Tuning wire (strand body)
8 Slide cylinder (actuator)
A Storage position C Work position

Claims (1)

The loading platform is provided on the loading platform so that it can be moved up and down by lifting means, and the loading platform is moved by the actuator along the pair of left and right mounting rails along the pair of left and right guide rails between the storage position below the loading platform and the working position behind the loading platform. In the retractable load receiving and lifting device configured to be slidable back and forth between the actuators, the actuator is a single slide cylinder , and two sets of synchronization acting on the mounting member and the guide rail respectively for pushing and pulling rope body is disposed wound symmetrically, by the expansion and contraction operation of the deployed slide cylinder in the width direction, to tune the left and right mounting member via a tuning rope body back and forth along the guide rail receiving platform sliding tuning mechanism in retractable receiving platform lifting device, wherein the benzalkonium is moved.

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