JP2014065424A - Loading platform lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loading platform lifting device capable of attaching a spare tire to a lower part of a vehicle without changing a departure angle.SOLUTION: A loading platform lifting device includes: left and right support frames 11 which are attached to a lower part of a vehicle frame 100; left and right arms 3 which are respectively connected with the left and right support frames 11 so as to rotate in a vertical direction; and a loading platform 4 which connects tips of the left and right arms 3 with each other. A space between the left and right support frames 11 opens to the front side. When the left and right support frames 11 are connected, the left and right support frames 11 are connected by a cross member 12 in a position at the rear side relative to rotation fulcrums of the arms 3.

Description

  The present invention relates to a load receiving table lifting device including a load receiving table that moves up and down between a ground and a load carrier.

  Some load receiving platform lifting devices support a cargo handling operation by rotating a pair of left and right arms up and down with respect to a vehicle loading platform so as to raise and lower the load receiving platform attached to these arms (Patent Document 1, etc.). reference).

JP 2011-207291 A

  By the way, even when the cargo receiving platform lifting device is attached, a spare tire may be stored under the vehicle frame. In this case, there are the following problems.

  For example, the arm of the load receiving platform lifting device is supported by a base frame provided on the lower side of the vehicle frame. Since the arm of the load receiving platform elevating device requires a predetermined length, the base frame must be disposed at a position that enters a predetermined distance from the rear end of the vehicle frame on the lower side of the vehicle frame. In addition, there is no room in the space ahead of the load receiving platform elevating device, such as a shaft and a muffler, and even if installed, the rear wheel of the vehicle becomes an obstacle, and it is inconvenient to attach and detach the spare tire. Therefore, when a spare tire is attached to a vehicle together with the load receiving platform lifting device, the spare tire is generally stored below the base frame of the load receiving platform lifting device. However, storing the spare tire under the base frame can reduce the departure angle.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a load receiving table lifting device capable of attaching a spare tire to a lower portion of a vehicle without changing a departure angle.

  In order to achieve the above object, a first invention includes left and right support frames attached to a lower portion of a vehicle frame, left and right arms respectively connected to the left and right support frames so as to be rotatable up and down, And a receiving platform connected to the tip of the arm, and a space between the left and right support frames is opened forward.

  According to a second invention, in the first invention, a cross member for connecting the left and right support frames is provided at a position rearward of the pivot point of the arm.

  A third invention is characterized in that, in the second invention, an oblique material is provided obliquely at a corner portion constituted by the support frame and the cross member.

  According to the present invention, since the spare tire can be held at a height that overlaps with the base frame of the load receiving platform lifting device, the spare tire can be attached to the lower portion of the vehicle without changing the departure angle.

It is the perspective view showing with the vehicle which illustrates as an application object the load receiving stand raising / lowering device which concerns on one embodiment of this invention. It is a side view of the load receiving table raising / lowering apparatus which concerns on one embodiment of this invention. It is a perspective view of the base frame of the load receiving table raising / lowering apparatus which concerns on one embodiment of this invention. It is a perspective view of the base frame of the load receiving table raising / lowering apparatus which concerns on a comparative example. It is a side view showing the state which attached the spare tire to the vehicle to which the load receiving table raising / lowering device which concerns on a comparative example is applied. It is a side view showing the state where the spare tire was attached to the vehicle to which the load receiving table raising / lowering device according to one embodiment of the present invention is applied.

  Embodiments of the present invention will be described below with reference to the drawings.

1. FIG. 1 is a perspective view illustrating a load receiving table lifting apparatus according to an embodiment of the present invention together with a vehicle exemplified as an application target, and FIG. 2 is a side view of the load receiving table lifting apparatus. The term “front and rear” as used herein refers to the front and rear of the vehicle, and the driver's seat (not shown) side of the vehicle is the front side.

  1 includes a base frame 2 attached to a lower part of a vehicle casing 100, left and right arms 3 connected to the base frame 2, and a load receiving base 4 connected to the tips of the left and right arms 3. And a hydraulic cylinder 5 for raising and lowering the load receiving platform 4. The arm 3 is formed by assembling a plurality of links, has a parallel link mechanism and a tilt link mechanism, and is connected to the base frame 2 via pins 6 and 7. When the loading platform 4 is stowed along the rear surface of the loading platform 101 of the vehicle as shown by the solid line in both figures and the hydraulic cylinder 5 is contracted by operating an operating device (not shown), FIG. As shown in the figure, it is deployed horizontally at the height of the floor surface of the loading platform 101 (see the two-dot chain line 4a), and subsequently, when the hydraulic cylinder 5 is contracted, it is lowered to the height at which it is grounded in the horizontal position (see the two-dot chain line 4b). When the hydraulic cylinder 5 is further contracted, the tip is tilted to the grounding position (see the two-dot chain line 4c). When the hydraulic cylinder 5 is extended, the operation is reversed.

2. Base Frame FIG. 3 is a perspective view of the base frame 2.

  The base frame 2 includes left and right support frames 11, cross members 12 and 13 that connect the left and right support frames 11, a bumper 14, and an oblique member 15.

  The support frame 11 has sufficient rigidity to sufficiently support the moment of the arm 3, the hydraulic cylinder 5, and the load receiving platform 4, and the left and right mounting frames 16 connected to the lower portion of the vehicle frame 100 and the left and right mounting frames 16 Left and right arm frames 17 respectively connected to the outside in the vehicle width direction, and bumper frames 18 respectively connected to the left and right arm frames 17 are provided. The mounting frame 16 is a rectangular pipe-like member extending in the front-rear direction, and the upper surface is connected to the frame of the vehicle frame 100 with bolts or the like. The arm frame 17 includes left and right supports 21 that extend outward in the vehicle width direction from the vicinity of the front end portions of the left and right mounting frames 16, and brackets 22 that are respectively mounted near the base portions of the left and right supports 21. The bracket 22 is provided with a pin hole 23 (only a pin hole through which the pin 6 is passed) through which the pins 6 and 7 connecting the arm 3 are passed. The left and right arms 3 and the hydraulic cylinder 5 of the load receiving table lifting / lowering device 1 are connected to the left and right brackets 22 so as to be vertically rotatable. The bumper frame 18 extends rearward from the vicinity of the tip of the support 21.

  The cross member 12 connects the left and right mounting frames 16 at a position on the rear side of the pivot point of the arm 3. This cross member 12 connects the support frame 11 and increases the rigidity of the base frame 2. In the present embodiment, since the arm 3 constitutes a link mechanism, each of the pins 6 and 7 (see FIG. 1) can be regarded as a rotation fulcrum of the arm 3. Even if there are a plurality of pivoting fulcrums, the cross member 12 is located behind the pivoting fulcrum (in other words, each pin hole 23), and in the example of FIG. doing. The cross member 13 connects the rear ends of the left and right mounting frames 16.

  The bumper 14 includes left and right bumpers 25 and a central bumper 26. The left and right bumpers 25 are respectively supported at the rear ends of the left and right bumper frames 18. The central bumper 26 is supported on the rear surface of the cross member 13. The bumpers 25 and 26 extend to the left and right along substantially the same straight line, but between the left and right bumpers 25 and the central bumper 26, the left and right arms 3 and the hydraulic cylinder 5 that rotate up and down. In order to pass through, a predetermined gap is interposed.

  The diagonal members 15 are reinforcing members that are obliquely passed to the corners of the U-shaped space formed by the left and right mounting frames 16 and the front cross member 12, each having one end at the mounting frame 16 and the other. The end is fixed to the cross member 12 by welding or the like. As described above, the position of the front cross member 12 is behind the pivot point of the arm 3, and the space in front of the cross member 12 between the left and right support frames 11 is opened forward. The left and right diagonal members 15 are present in the space opened to the front, but each of them is inclined rearward toward the center in the vehicle width direction, while increasing the connection strength between the left and right support frames 11 and the cross member 12. Also, the space opened forward between the left and right support frames 11 is not blocked. In addition, the front-rear direction position of one end of the diagonal member 15 is approximately the same as the support 21 and is a position close to the pivot point of the arm 3. The oblique member 15 extends from the one end side at an angle of about 45 degrees with respect to the mounting frame 16. When a spare tire 102 described later is stored below the vehicle frame 100, the outer circumference of the spare tire 102 is Touch or approach a surface.

3. Comparative Example FIG. 4 is a perspective view of a base frame of a load receiving table lifting apparatus according to a comparative example.

  In the base frame 202 according to the comparative example shown in FIG. 4, the front ends and the rear ends of the left and right mounting frames 216 are connected by cross members 212 and 213. Since the front end portions of the left and right mounting frames 216 are connected by the cross member 212, the front side of the space between the left and right mounting frames 216 is closed by the cross member 212. Since the cross member 212 on the front side has substantially the same position in the front-rear direction as the left and right supports 221, the cross member 212 is positioned in front of the pivot fulcrum (the position of each pin hole 223) of the arm in the bracket 222. Yes. The left and right supports 221 support the left and right bumpers 225 via the bumper frame 218. The point that the left and right bumpers 225 are divided with respect to the central bumper 226 attached to the rear cross member 213 is the same as in the above embodiment.

  FIG. 5 is a side view showing a state in which a spare tire is attached to a vehicle to which the load receiving platform lifting apparatus according to the comparative example including the base frame of FIG. 4 is applied.

  Since the arm 203 of the load receiving platform elevating device needs to have a predetermined length, the base portion (rotating fulcrum) of the arm 203 does not have to be located at a position that enters the lower side of the vehicle frame 100 by a predetermined distance L from the rear end of the vehicle frame 100. I do not get. In the load receiving platform lifting apparatus of the comparative example, the cross member 212 of the base frame 202 extends to the left and right between the pivot points (pins 206 and 207) of the left and right arms 203. When the spare tire 102 is attached to the lower part of the vehicle frame 100 by installing the spare tire 102, the spare tire 102 must be stored at a position below the cross member 212. However, if the spare tire 102 is disposed below the cross member 212, the height of the spare tire 102 from the ground is lowered, and the spare tire 102 is below the tangent L of the rear wheel that contacts the lower rear end of the bumper 225. 102 protrudes and the departure angle decreases from the original angle α to the angle β (<α). In the present specification, the term “departure angle” refers to the minimum angle formed by the tangent line of the rear wheel contacting the structure behind the rear wheel of the vehicle with respect to the ground.

4). Effect FIG. 6 is a side view showing a state in which a spare tire is attached to a vehicle to which the load receiving platform lifting apparatus according to the embodiment of the present invention is applied.

  As shown in the figure, in the case of the load receiving platform lifting / lowering device 1 according to the present embodiment, the cross member 12 is located behind the pivot of the arm 3, and the space between the left and right mounting frames 16. Since the opening is forward, a part of the spare tire 102 can be inserted into the space between the left and right mounting frames 16. Accordingly, as shown in FIG. 6, the spare tire 102 can be brought close to the lower surface of the vehicle frame 100, and the spare tire 102 can be stored at a height that overlaps the base frame 2. As a result, the spare tire 102 can be accommodated so as not to protrude downward from the tangent L of the rear wheel contacting the lower rear end of the bumper 225. Even if the spare tire 102 is attached to the lower side of the vehicle frame 100, the departure angle Can be maintained at the original angle α.

  Since the spare tire 102 can be stored at a position partially inserted between the pivots of the left and right arms 3, the spare tire 102 should not overlap the rear wheels of the vehicle when viewed from the left and right as shown in FIG. Can do. Therefore, the spare tire 102 can be easily attached and detached without being obstructed by the rear wheel.

  In addition, in the present embodiment, the spare tire 102 is stored without changing the departure angle as described above. On the other hand, while the frame structure is special, the provision of the diagonal member 15 can ensure sufficient frame strength compared to the comparative example. Therefore, it is possible to suppress a decrease in frame strength due to the creation of a space for storing the spare tire 102, and to sufficiently have the original function as a base frame that supports the arm 3, the hydraulic cylinder 5, and the load receiving platform 4. Needless to say.

5. 3. Others FIG. 3 illustrates the case where the cross member 12 is formed in a straight line shape, but the shape can be changed as appropriate so that the spare tire 102 can easily enter between the left and right support frames 11. For example, it is possible to have a bent shape (arc shape, V shape, etc.) so that the center portion is located rearward with respect to both end portions, and the center portion of the front surface is not rearward, instead of bending the cross member 12 itself. The shape can also be recessed. Thus, it becomes easier to secure a storage space for the spare tire 102 by recessing the cross member 12. On the other hand, in order to secure a storage space equivalent to that in the above embodiment, the connection position of the cross member 12 with the support frame 11 can be set in front of that in the above embodiment.

  Further, for example, when sufficient rigidity can be secured to the base frame 2 without reinforcement by the cross members 12 and 13 by changing the material, dimensions, etc. of other constituent members, at least one of the cross members 12 and 13 is omitted. You can also When the cross member 12 is omitted, a configuration that is more advantageous in securing a storage space for the spare tire 102 can be obtained. When the cross member 13 is omitted, the bumper 26 may be connected to the rear end of the mounting frame 16. In addition, the bumpers 25 and 26 can be omitted. The bumpers 25 and 26 do not have to be components of the cargo receiving platform lifting / lowering device 1 and may be attached to the vehicle frame 100 side, for example.

  Further, the configuration in which the diagonal member 15 is provided in order to improve the connection strength of the support member 11 by the cross member 12 has been described as an example. However, when the reinforcement by the diagonal member 15 is unnecessary, the diagonal member 15 is omitted. can do. Of course, when the cross member 12 is omitted, it can be omitted. Moreover, although the case where the diagonal member 15 is provided on the left and right is described as an example, the diagonal member 15 may be provided on only one of the left and right sides. Furthermore, the structure which provides the diagonal material 15 not on the front side of the cross member 12 but on the rear side is also considered.

  In addition, although the case where the present invention is applied to the load receiving platform lifting / lowering device 1 of the type that raises the load receiving platform 4 along the rear surface of the loading platform 101 during storage has been described as an example, the application target of the present invention is limited to this. Not. Generally, in a load receiving table lifting apparatus that moves an arm up and down to move a load receiving table up and down, a frame that supports the base of the arm exists at the lower part of the vehicle frame. The present invention can be applied to any load receiving device lifting device that moves the arm up and down to raise and lower the load receiving device, and thus a load receiving device lifting device in which the frame that supports the base of the arm exists at the lower part of the vehicle frame. This type of load receiving platform lifting device includes, for example, a load receiving platform lifting device that stores the load receiving platform under the vehicle frame.

3 Arm 4 Loading platform 11 Support frame 12 Cross member 15 Diagonal member 16 Support frame 100 Car frame

Claims (3)

Left and right support frames attached to the bottom of the car frame,
Left and right arms connected to the left and right support frames so as to be rotatable up and down,
With a load receiving stand connected to the ends of these left and right arms,
A load receiving table elevating device, wherein a space between the left and right support frames opens forward.   2. The load receiving table lifting / lowering device according to claim 1, further comprising a cross member that connects the left and right support frames at a position rearward of the pivot point of the arm.   3. The load receiving table lifting / lowering device according to claim 2, further comprising an oblique member that is obliquely passed to a corner portion constituted by the support frame and the cross member.

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