JP3110173U - Retractable loading platform lifting device - Google Patents

Abstract

Disclosed is a retractable load receiving device lifting / lowering device that prevents dirt from adhering to a sliding surface of a slide rail.
A load receiving platform 5 is provided so as to be movable up and down via a link mechanism 4, and in a state where the load receiving platform 5 is folded back and forth, a slide rail 12 is provided via a sliding means at a storage position below the load receiving platform 1. In the retractable load receiving device lifting and lowering apparatus 2 configured to be slidable along the slide rail 12, the slide rail 12 is formed as a hollow body having an opening below, and the sliding means is provided on the inside thereof. To prevent dirt from adhering to the sliding surface of the slide rail.
[Selection] Figure 1

Description

  The present invention relates to a retractable load receiving base lifting device in which a load receiving base is provided so as to be movable up and down via a link mechanism, and is slidable downward along a slide rail via a sliding means. .

  As shown in FIG. 8, conventionally, a load receiving platform a5 is provided so as to be movable up and down by a lifting mechanism via a link mechanism, and the load receiving platform a5 side including the link mechanism and the lifting mechanism is connected to the loading platform a1 side through left and right slide members. A retractable load receiving table configured to be slidable back and forth between a storage position below the loading platform a1 and a work position behind the loading platform a1 along a pair of left and right slide rails a12 provided, and stores the loading platform a5 in the storage position. A lifting device a2 is provided.

In this conventional retractable load receiving device elevating device a2, as shown in FIG. 9, a load receiving stand a5 is provided on one end side of a mounting member a3 via a link mechanism, and rollers a81 and a81 are slide rails on the other end side. The mounting base a5 is slid by guiding the mounting member a3 along the slide rail.
JP 2001-347876 A

  However, in the conventional retractable load receiving device elevating device a2, the load receiving table a5 can be stably slid by the slide rail a12, but the sliding surfaces of the rollers a81, a81 and the slide rail a12 do not cover anything. Because it is exposed to the outside and dust that scatters from the road surface while traveling, the state of the sliding surface becomes poor, and it is impossible to slide smoothly when sliding the load receiving platform There was a problem.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a retractable load receiving base having a structure in which dirt does not easily adhere to the sliding surface between the sliding portion and the slide rail a12. The object is to provide a lifting device.

  In order to solve the above-mentioned problems, the retractable load receiving device lifting apparatus of the present invention is provided with a load receiving table that can be moved up and down via a link mechanism, and in the state where the load receiving table is folded back and forth, a storage position below the load receiving table. In the retractable load receiving and lifting device configured to be slidable along the slide rail through the sliding means, the slide rail is a hollow body having an opening portion below, and the inside of the slide rail is A sliding means is provided.

  By providing this sliding means inside the slide rail, entry of dirt from the outside can be prevented, and dirt can be prevented from adhering to the sliding surface.

  Specifically, the sliding means includes a slide block that slides in contact with the inner surface of the slide rail.

  Further, the sliding means may be constituted by a roller, and the roller may be provided so as to be able to roll freely in contact with the inner surface of the slide rail.

  This makes it possible to slide the load receiving table more smoothly.

  As described above, according to the retractable load receiving device lifting apparatus of the present invention, the slide rail is formed into a hollow body having an opening at the lower side, and the sliding means is provided on the inner side. It is possible to prevent the dirt from adhering to the sliding surface without being exposed, and thus the load receiving table can be smoothly slid at any time. Moreover, the load receiving platform can be slid more smoothly by configuring the sliding means with a rollable roller.

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

  FIG. 1 shows a schematic configuration of a retractable load receiving device lifting apparatus according to the present invention.

  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.

  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.

  The mounting member 3 is slidable in the front-rear direction along the inner surface of a hollow slide rail 12 disposed in the front-rear direction at the rear end portion of the vehicle frame 11 via sliding means. Specifically, as shown in FIG. 2, the slide rail 12 is a hollow body having an opening below, and a slide block 81 provided above the attachment member 3 is illustrated inside the slide rail 12. It is slidably arranged in a smooth state via a non-sliding member. Further, as shown in FIGS. 3 and 4, the sliding means may have a configuration in which rollers 82 and 82 are arranged to be able to roll inside the slide rail 12.

  The mounting member 3 is configured to be movable back and forth in the lower part of the floor of the loading platform 1 by sliding the mounting member 3 along the slide rail 12 manually or by an appropriate moving means.

  As an example of the moving means, a chain is stretched back and forth along the slide rail 12 below the slide rail 12, and a sprocket that meshes with the chain from below is provided on the attachment member 3. The attachment member 3 is moved back and forth by rotating in the forward and reverse directions via an appropriate transmission mechanism by the operation handle. The moving means may move the mounting member 3 back and forth using an actuator such as a motor or a cylinder in addition to the above-described configuration.

  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.

  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.

  The link mechanism 4 includes a lift link 41 as a lower link and a connecting link 42 as an upper link.

  The lift link 41 has a base end portion pivotally supported by a pivot 41 a in the middle of the rotating bracket 63.

  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 a portion near the end from below, the expansion and 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 is rotated up and down.

  The base end of the connecting link 42 is pivotally supported on the mounting member 3 by a pivot 42a.

  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 slide in synchronization with the slide rail 12. Are connected to each other by a connecting member 3a.

  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.

  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 supported on the lower portions. The part is pivotally supported by the pivot 41b.

  Further, the tip of the front end 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.

  The retractable load receiving device lifting / lowering device 2 configured as described above has a storage position in which the mounting member 3 is slid to the front end portion of the slide rail 12 and stored in a state in which the load receiving stand 5 is folded by the operation of the moving means described above ( 5) A and the load receiving base 5 that is folded by sliding the mounting member 3 to the rear end of the slide rail 12 is unfolded so that the distal end side member 51 and the proximal end side member 52 are horizontal, The unfolding / folding position (see FIG. 6) B for folding the unfolded loading platform 5 and the loading platform 5 in the expanded state by sliding the mounting member 3 to the middle position of the slide rail 12 are the ground and the floor surface of the loading platform 1. And an elevating work position (see FIG. 7) C that is moved up and down.

  When loading and unloading work, the load receiving platform 5 is slid and used in this way. However, in the conventional retractable load receiving lift device, there are cases where it cannot be smoothly slid. In the structure of the conventional slide rail a12, since the sliding surface is exposed to the outside, dust and dust scattered from the road surface may enter during traveling, and dirt may adhere to the sliding surface of the slide rail a12. This is because the. In the present invention, the slide rail 12 is a hollow body having an opening at the bottom, and a sliding surface is provided on the inner side of the slide rail 12 so that dust and dust do not easily enter. There is almost no dirt on the surface, and the cradle 5 can be slid well at any time.

  Next, the operation of the above-described retractable load receiving table lifting device will be described.

  First, as shown in FIG. 5, when loading and unloading work is performed by the retractable load receiving device lifting device 2 arranged at the storage position A, the mounting member 3 is slid from the front end portion of the slide rail 12 to the rear end portion. By doing so, the retractable load receiving device lifting device 2 is disposed at the unfolding / folding position B shown in FIG. 6 with the load receiving stand 5 folded.

  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 and placed at the lifting / lowering operation 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.

  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 opposite to the operation described above. That is, the retractable load receiving table lifting / lowering device 2 is temporarily arranged from the lifting / lowering operation position C to the unfolding / folding position B. 3 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 arranged at the storage position A.

  In the present embodiment, the lift link 41 as the lower link is transmitted and rotated by the lift cylinder 62 and rotated to thereby lift and lower the load receiving platform 5. The mechanism is not limited to this, and it may be carried on the connecting link 42 side as the upper link, and the driving source for rotating the lower link and the upper link is not limited to this.

It is a side view of an example of the sliding means in the retractable cargo receiver lifting device of the present invention. It is sectional drawing of an example of the sliding means in a retractable load receiving stand raising / lowering apparatus similarly. It is a side view of the other example of the sliding means in a retractable load receiving table raising / lowering apparatus similarly. It is sectional drawing of the other example of the sliding means in a retractable cargo receiving stand raising / lowering apparatus similarly. Similarly, it is a side view showing a state A in which the retractable load receiving device lifting device is disposed at the storage position. Similarly, it is a side view showing a state B in which the retractable load receiving table lifting device is disposed at the unfolded / folded position. Similarly, it is a side view showing a state C in which the retractable load receiving table lifting device is disposed at the lifting work position. It is a side view of the conventional retractable load receiving table lifting device. It is sectional drawing of the sliding part of the conventional retractable load receiving device raising / lowering apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loading platform 2 Retractable loading platform elevating device 3 Mounting member 4 Link mechanism 41 Lift link (downward link)
42 Link (Uplink)
5 Loading platform 81 Slide block 82 Roller A Storage position B Unfolding / folding position C Elevating work position

Claims (3)

A load receiving platform is provided so as to be movable up and down via a link mechanism, and can be stored by being slid along a slide rail via a sliding means in a storage position below the load receiving platform with the load receiving table folded back and forth. In the retractable cradle lifting device configured in
2. A retractable load receiving device lifting apparatus according to claim 1, wherein the slide rail is a hollow body having an opening at the bottom, and the sliding means is provided on the inside thereof.   The retractable load receiving device lifting / lowering apparatus according to claim 1, wherein the sliding means is a slide block that contacts and slides on an inner surface of the slide rail.   2. The retractable load receiving device lifting / lowering apparatus according to claim 1, wherein the sliding means comprises a roller, and the roller is provided so as to be able to roll in contact with the inner surface of the slide rail.

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