Loading platform lifting device and vehicle

Abstract

To install a loading platform lifting device by using a through hole normally provided in a chassis frame without disturbing installation of other objects to be installed.SOLUTION: In a loading platform lifting device attached to a chassis frame via an attachment bracket, the attachment bracket includes: a first through hole through which a first bolt used for fastening with the chassis frame penetrates; and a second through hole which is provided for installation of an object to be installed in place of the through hole of the chassis frame through which the first bolt penetrates.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a loading platform lifting device that assists in loading and unloading of luggage and the like onto a loading platform of a vehicle, and to a vehicle equipped with the same. [Background technology]

[0002] The loading platform lifting device is a device that raises and lowers the loading platform between the height of the loading platform floor of the vehicle and the height where it touches the ground, and assists in loading and unloading of luggage and the like onto the loading platform (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-123778 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, an underfloor storage type loading platform lifting device is attached to the chassis frame via a bracket. Conventionally, the loading platform lifting device bracket has generally been welded to the chassis frame, but due to factors such as the possibility of affecting the surface coating (paint, etc.) applied to the chassis frame for rust prevention purposes, it is becoming necessary to consider an alternative method of attaching the loading platform lifting device to the chassis frame.

[0005] Bolt fastening is considered as an alternative to welding to attach the platform lifting device, but because the chassis frame is designed based on meticulous calculations from the perspective of weight reduction and strength, it may not be possible to perform additional work such as drilling holes in desired locations. Therefore, when bolt fastening is used, priority is given to using the general-purpose through holes that are provided as standard in various locations on the chassis frame.

[0006] However, the through holes that are standardly provided in the chassis frame are also used to fasten brackets for other mounted equipment, such as cargo boxes, etc. Therefore, there is a possibility that the through holes to be used for mounting the brackets of the loading platform lifting device may overlap with the through holes for mounting the brackets of the other mounted equipment.

[0007] The object of the present invention is to provide a loading platform lifting device that can be mounted using the standard through holes provided in the chassis frame without interfering with the mounting of other mounted objects, and a vehicle equipped with the same. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides: The chassis frame to which the bodywork is attached via the bodywork bracket, Via mounting bracket Take In the load receiving platform lifting device, the mounting bracket has a first through hole through which a first bolt used for fastening to the chassis frame is passed, and a through hole in the chassis frame through which the first bolt is passed. The aforementioned and a second through hole provided for mounting an object. The mounting bracket is fastened to the chassis frame by a first bolt passed through the first through hole, and the mounting bracket is fastened to the chassis frame by a second bolt passed through the second through hole. A loading platform lifting device is provided. [Effects of the Invention]

[0009] According to the present invention, the loading platform lifting device can be mounted using the through-holes that are provided as standard in the chassis frame without interfering with the mounting of other mounted objects. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a side view showing a loading platform lifting device according to an embodiment of the present invention and the rear of a vehicle to which the loading platform lifting device is mounted. [Figure 2] FIG. 1 is a perspective view showing a mounting bracket provided in a loading platform lifting device according to an embodiment of the present invention; [Figure 3] 1 is a view showing a mounting bracket and a mounting bracket provided in a loading platform lifting device according to an embodiment of the present invention (a view taken along the arrow AA in FIG. 1); [Figure 4] Diagram showing a typical mounting bracket (viewed from the arrow BB in Figure 1) DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] -vehicle- FIG. 1 is a side view showing a loading platform lifting device according to one embodiment of the present invention and the rear of a vehicle to which the device is mounted. FIG. 1 shows a state in which the loading platform is folded and retracted under the chassis frame for storage. In this specification, the left and right sides of FIG. 1 correspond to the front and rear of the loading platform lifting device. For example, FIG. 1 illustrates a case in which the loading platform lifting device is mounted on the rear of a vehicle and the loading platform is pulled out to the rear of the vehicle. In this state, the front-to-rear direction of the loading platform lifting device coincides with the front-to-rear direction of the vehicle. However, there are also cases in which the loading platform lifting device is mounted on the side of a vehicle so that the loading platform can be pulled out. In such cases, the front-to-rear direction of the loading platform lifting device is perpendicular to the front-to-rear direction of the vehicle.

[0013] The vehicle shown in the figure comprises a chassis frame (car frame) F, a driver's cab (not shown) provided in front of the chassis frame F, a loading platform L mounted on top of the chassis frame F, and a loading platform lifting device 1. Only the lower part of the loading platform L is shown in FIG.

[0014] The chassis frame F has a large number of through holes H. The through holes H are mainly arranged on the side surfaces of the chassis frame F in a line in the longitudinal direction of the chassis frame F. The through holes H on the side surfaces of the chassis frame F are open in the left-right direction. However, the through holes H may include those provided on the upper and lower surfaces of the chassis frame F, or through holes lined up vertically.

[0015] The cargo bed L is one of the mounted objects attached to the chassis frame F. The cargo bed L is attached to the chassis frame F via mounted object brackets B3 and B4. The configuration of the mounted object brackets B3 and B4 will be described later with reference to Figures 2 to 4.

[0016] -Load receiving platform lifting device- In this embodiment, the loading platform lifting device 1 is mounted on the lower rear side of the chassis frame F. This loading platform lifting device 1 is of an underfloor storage type in which, for example, when the vehicle is traveling, the loading platform (platform) 20 is folded and retracted under the chassis frame F for storage. During cargo handling operations (loading and unloading cargo onto the loading platform), the loading platform 20 is pulled out to the outside of the chassis frame F (rearward in this embodiment) and unfolded, and is raised and lowered between the height of the loading platform floor and the height at which it touches the ground to support the cargo handling operation.

[0017] The receiving platform lifting device 1 comprises a receiving platform 20, a slider unit 30, a lifter unit 40, a power unit (not shown), and a control device (not shown). The slider unit 30 is a unit including an actuator that moves the receiving platform 20 etc. in the forward and backward directions. The lifter unit 40 is a unit including an actuator that raises and lowers the receiving platform 20. The power unit is a drive device that drives the slider unit 30 and the lifter unit 40. The control device is a device that controls the power unit. The slider unit 30, the lifter unit 40, and the receiving platform 20 will be explained in order.

[0018] -Slider unit- The slider unit 30 includes left and right guide rails 31, a slider 32, and a slide cylinder (not shown). The left and right guide rails 31 are attached to the rear lower side of the chassis frame F in an orientation extending parallel to the front and rear. These guide rails 31 are fixed to the chassis frame F via front and rear mounting brackets B1 and B2. The configuration of the mounting brackets B1 and B2 will be described later using Figures 2 to 4. The slider 32 is slidably attached to the left and right guide rails 31 and can move back and forth along the guide rails 31. The slide cylinder is a double-acting hydraulic cylinder, and both ends are fixed to the guide rails 31 and the slider 32 via appropriate support members. The extension and retraction of the slide cylinder moves the slider 32 back and forth along the guide rails 31, and the load receiving platform 20 supported by the slider 32 via the lifter unit 40 moves back and forth.

[0019] -Lifter unit- The lifter unit 40 includes a first arm (tilt arm) 41, a second arm (lift arm) 42, a third arm (compression arm) 43, and a lift cylinder 44, one on each side. The lifter unit 40 supports the load receiving platform 20 so as not to interfere with the load receiving surface. The first arm 41 is connected at its upper portion to the slider 32 via a pin, and its lower portion rotates back and forth. The second arm 42 is rotatably connected at its front end to the first arm 41 and at its rear end to the load receiving platform 20 via shafts P1 and P2 extending left and right, respectively. The third arm 43 is rotatably connected at its front end to the slider 32 and at its rear end to the load receiving platform 20 via shafts P3 and P4 extending left and right, respectively. The lift cylinder 44 is a single-acting hydraulic cylinder (a double-acting type may also be used), and in this embodiment, its front end is rotatably connected to the first arm 41 and its rear end is rotatably connected to the second arm 42. The second arm 42 and the third arm 43 form a parallel link that connects the loading platform 20 to the slider 32 so that the loading platform 20 can be raised and lowered (the axes P1-P4 form the vertices of a parallelogram). This parallel link rotates up and down as the lift cylinder 44 extends and retracts, thereby raising and lowering the loading platform 20 while maintaining a horizontal position.

[0020] -Loading platform- The receiving platform 20 is a platform that receives and raises and lowers luggage and the like, and includes a base receiving platform 21 connected to the lifter unit 40 and a front receiving platform 22 rotatably connected to the rear of the base receiving platform 21 via a hinge (not shown). The front receiving platform 22 rotates about the hinge as a fulcrum, and is flipped counterclockwise (left) from its unfolded state when viewed from the left (rotated 180 degrees) and folded over the top of the base receiving platform 21 ( FIG. 1 ). The rear end surface of the receiving platform 20 in the folded state forms a bumper. The left-to-right width of the receiving platform 20 is, for example, approximately the same as the width of the entrance of the loading platform and is wider than the outer dimensions of the left and right chassis frames F. In this embodiment, the front receiving platform 22 is non-foldable, and the receiving platform 20 has a two-panel folding structure that includes only one front receiving platform 22. When viewed from the left and right, the load-receiving platform 20 is formed in a triangular shape that becomes thinner from the base end to the tip (rear) when unfolded.

[0021] -bracket- Fig. 2 is a perspective view of the mounting bracket B1, Fig. 3 is a view of the mounting bracket B1 and the mounting bracket B3 (viewed from the arrow AA in Fig. 1), and Fig. 4 is a view of the mounting bracket B4 (viewed from the arrow BB in Fig. 1). Note that the mounting bracket B2 has the same configuration as the mounting bracket B1 described below, except that it is symmetrical from front to back to the mounting bracket B1 shown in Fig. 2.

[0022] The mounting bracket B1 of the loading platform lifting device 1 is a part for attaching the guide rail 31 to the chassis frame F, and is provided with a first through hole b1 and a second through hole b2. There can be one first through hole b1 and one second through hole b2 per mounting bracket B1, but Fig. 2 shows an example in which a plurality of first through holes b1 and a plurality of second through holes b2 are provided.

[0023] The first through-hole b1 is a hole through which a first bolt M1 is passed, which is used to fasten the platform lifting device 1 to the chassis frame F. In other words, the mounting bracket B1 is fixed to the chassis frame F by aligning the position of the first through-hole b1 with the through-hole H at a desired position on the chassis frame F, passing the first bolt M1 through the through-hole H and the first through-hole b1, and tightening the nut N.

[0024] As shown in FIG. 2, this embodiment illustrates a configuration in which the mounting bracket B1 has a total of six first through holes b1, arranged in two rows of three each at the front and rear. Since the loading platform lifting device 1 is suspended from the chassis frame F, multiple rows of the first through holes b1 used for mounting are provided to ensure sufficient strength. If the layout of the through holes H of the chassis frame F allows for three or more rows of the first through holes b1, three or more rows of the first through holes b1 may be provided. Conversely, if multiple rows of the first through holes b1 cannot be provided, a single row of the first through holes b1 may be provided.

[0025] The second through hole b2 is a hole provided as a substitute for the through hole H of the chassis frame F through which the first bolt M1 passes. There are cases where the through hole H to be used to fasten the mounting bracket B1 is assumed to be a hole to be used to fasten a bracket of a mounted object other than the load-receiving platform lifting device 1 (in this example, the mounted object bracket B3 of the loading platform L). Therefore, instead of using the through hole H to fasten the mounting bracket B1, the second through hole b2 is provided in the mounting bracket B1 as a substitute for the through hole H that was assumed to be used to fasten the mounted object bracket B3. The mounted object bracket B3 of the loading platform L is fastened to the mounting bracket B1 by the second bolt M2 passed through the second through hole b2 of the mounting bracket B1, and is fixed to the chassis frame F via the mounting bracket B1.

[0026] As long as the mounting bracket B1 has the first through hole b1 and the second through hole b2 that function as described above, the configuration of the mounting bracket B1 is not limited to the configuration shown in FIG. 2 , but the mounting bracket B1 exemplified in this embodiment is formed by bending a single plate. Specifically, the mounting bracket B1 is formed into an L-shape when viewed from the front and rear, with a vertical plate portion b4 and a horizontal plate portion b5. The vertical plate portion b4 is a vertical portion extending in the front-rear direction, and the horizontal plate portion b5 is a horizontal portion bent outward in the left-right direction (vehicle width direction) from the upper end of the vertical plate portion b4. The lower end of the vertical plate portion b4 is bent outward to the right (vehicle width direction) to increase its strength.

[0027] The first through hole b1 is provided in the vertical plate portion b4, and the second through hole b2 is provided in the horizontal plate portion b5, with the opening direction of the first through hole b1 and the opening direction of the second through hole b2 being different. In this embodiment, the first through hole b1 opens in a direction perpendicular to the vertical plate portion b4 (left-right direction), and the second through hole b2 opens in a direction perpendicular to the horizontal plate portion b5 (up-down direction). In this embodiment, the narrow angle between the vertical plate portion b4 and the horizontal plate portion b5 is set to 90 degrees, so the opening direction of the first through hole b1 and the opening direction of the second through hole b2 are perpendicular to each other. However, the opening directions of the first through hole b1 and the second through hole b2 can be changed as needed depending on the opening direction of the through hole H of the chassis frame F and the connection between the mounting bracket B1 and the mounted object bracket B3.

[0028] The mounting bracket B1 has a rib-shaped plate b6 that is welded to the vertical and horizontal plate portions b4 and b5 and is perpendicular to the vertical and horizontal plate portions b4 and b5. The plate b6 has through holes b3 (two in FIG. 2). The plate b6 is provided on the front side of the mounting bracket B1 and on the rear side of the mounting bracket B2. A third bolt M3 is passed through the through hole b3, and the guide rail 31 of the platform lifting device 1 is connected to the plate b6, i.e., the mounting bracket B1, by the third bolt M3.

[0029] The body bracket B3 connected to the mounting bracket B1 is formed by bending a single plate and is L-shaped when viewed from the front and rear with a vertical plate portion b7 and a horizontal plate portion b8. The vertical plate portion b7 is a vertical portion extending front to rear, and the horizontal plate portion b8 is a horizontal portion bending outward in the left-right direction (vehicle width direction) from the lower end of the vertical plate portion b7. The vertical plate portion b7 is connected to the cargo bed L with a fourth bolt M4. The horizontal plate portion b8 faces and contacts the upper surface of the horizontal plate portion b5 of the mounting bracket B1 and is fastened to the horizontal plate portion b5 with the second bolt M2 and nut N. In this way, the body bracket B3 is connected to the chassis frame F via the mounting bracket B1.

[0030] In contrast, the mounting bracket B4, which does not overlap with the mounting bracket B1 of the loading platform lifting device 1, is bolted directly to the chassis frame F without the mounting bracket B1. As an example, Figure 4 shows a configuration in which the mounting bracket B4 is formed into a smooth plate shape and is connected to the chassis frame F and the loading platform L by a second bolt M2 and a fourth bolt M4.

[0031] -effect- (1) According to this embodiment, the loading platform lifting device 1 can be mounted by bolting via the mounting brackets B1, B2 and using the desired through-holes H in the chassis frame F. In this case, even if a portion of the mounting bracket of the mounting object, such as the loading platform L, overlaps with the mounting brackets B1, B2 and cannot be aligned with the through-holes H, the mounting bracket can be fixed using the second through-holes b2 provided in the mounting brackets B1, B2.

[0032] In this embodiment, due to the positional relationship between the second through hole b2 of the mounting bracket B1 and the corresponding through hole H of the chassis frame F, an L-shaped mounting bracket B3 is adopted, making it possible to connect the mounting object to the chassis frame F via the mounting bracket B1.

[0033] As described above, according to this embodiment, the loading platform lifting device 1 can be mounted on the chassis frame F by utilizing the through hole H that is standardly provided on the chassis frame F, without interfering with the mounting of other mounted objects such as the loading platform L.

[0034] (2) By making the opening direction of the first through hole b1 and the opening direction of the second through hole b2 different, the first bolt M1 and the second bolt M2 can be configured to be twisted. This allows the second bolt M2, which would be placed in the position of the first bolt M1 if the platform lifting device 1 were not present, to be placed comfortably without interfering with the first bolt M1. In particular, in this embodiment, the opening direction of the second through hole b2 is 90 degrees different from the opening direction of the first through hole b1. In this case, if a gap equal to or greater than the thickness of the head of the first bolt M1 is secured between the shaft (threaded portion) of the second bolt M2 and the vertical plate portion b4 of the mounting bracket B1, the second bolt M2 will not interfere with the first bolt M1, the vertical plate portion b4, or the like, regardless of the nominal length of the second bolt M2.

[0035] (3) The mounting bracket B1 can also be made of a block-shaped material and configured to have a through hole for the first bolt M1 and a bolt hole (tap hole) for the second bolt M2. However, in this case, the volume of the mounting bracket B1 becomes larger than necessary, resulting in wasted material and an increase in the vehicle weight.

[0036] In contrast, in this embodiment, by making the opening direction of the first through hole b1 different from the opening direction of the second through hole b2, the mounting bracket B1 can be constructed by bending a plate-shaped material into an L shape, thereby ensuring the necessary strength and reducing material waste.In addition, the plate b6 that connects the guide rails 31 of the loading platform lifting device 1 also serves as a rib, further improving the strength of the mounting bracket B1.

[0037] -others- In the above embodiment, the rear mounting bracket B2 of the loading platform lifting device 1 can be prevented from overlapping in the vehicle length direction with the mounting brackets of other mounted equipment such as the loading platform L. For mounting brackets whose layout does not interfere with the mounting brackets of other mounted equipment, the second through hole b2 can be omitted, and the configuration can be changed as appropriate in accordance with the omission of the second through hole b2.

[0038] Furthermore, among retractable loading platform lifting devices, there are some that can select a storage position in which the loading platform is erected along the wall surface (for example, the rear surface) of the vehicle loading platform in addition to the storage position in which the loading platform is stored under the vehicle frame (see, for example, JP 2008-189189 A). The present invention can also be applied to retractable loading platform lifting devices that adopt these two storage positions.

[0039] The present invention can also be applied to other types of loading platform lifting devices that are mounted on a chassis frame. For example, the present invention can be applied to a rotating and retractable loading platform lifting device that stores the loading platform under the vehicle frame without sliding it (see, for example, Japanese Patent Application Laid-Open No. 2010-52569). The present invention can also be applied to various loading platform lifting devices that store the loading platform by standing it upright at the rear of the loading platform (see, for example, Japanese Patent Application Laid-Open No. 2004-224082 and Japanese Patent Application Laid-Open No. 2007-331631).

[0040] In addition, although an example has been given of a structure in which the tip-side receiving platform 22 is a single piece and the receiving platform 20 folds at one point, the tip-side receiving platform 22 may be made up of multiple receiving platforms at the front and back, so that the receiving platform 20 folds at two or more points. [Explanation of symbols]

[0041] 1...load receiving platform lifting device, 20...load receiving platform, 31...guide rail, 32...slider, 41-43...arm, B1, B2...mounting bracket, B3...mounted object bracket, b1...first through hole, b2...second through hole, b4...vertical plate portion, b5...horizontal plate portion, F...chassis frame, H...through hole of chassis frame, L...loading platform (mounted object), M1...first bolt, M2...second bolt

Claims

1. A load receiving platform lifting device that is attached via a mounting bracket to a chassis frame to which a mounted object is attached via a mounted object bracket, The mounting bracket is a first through hole through which a first bolt used for fastening to the chassis frame is passed; a second through hole provided for mounting the mounted object as a substitute for the through hole of the chassis frame through which the first bolt passes, The mounting bracket is fastened to the chassis frame by a first bolt passed through the first through hole, and the mounting bracket is fastened to the chassis frame by a second bolt passed through the second through hole. A loading platform lifting device characterized by the above.

2. The loading platform lifting device according to claim 1, a guide rail attached to a lower portion of the chassis frame; a slider movable along the guide rail; an arm connected to the slider; a load receiving platform connected to the tip of the arm, The mounting bracket mounts the guide rail to the chassis frame. A loading platform lifting device characterized by the above.

3. The loading platform lifting device according to claim 1, A loading platform lifting device, characterized in that the opening direction of the first through hole and the opening direction of the second through hole are different.

4. The loading platform lifting device according to claim 3, A loading platform lifting device characterized in that the mounting bracket is formed in an L-shape with a vertical plate portion having the first through hole and a horizontal plate portion having the second through hole.

5. The chassis frame and An attachment mounted on the chassis frame; an attachment bracket for attaching the attachment to the chassis frame; a loading platform lifting device attached to the chassis frame via a mounting bracket, The mounting bracket is a first through hole through which a first bolt used for fastening to the chassis frame is passed; a second through hole provided for mounting the mounted object as a substitute for the through hole of the chassis frame through which the first bolt passes; It is equipped with The mounting bracket is fastened to the mounting bracket by a second bolt passed through the second through hole, and is fixed to the chassis frame via the mounting bracket. A vehicle characterized by:

6. The vehicle of claim 5, The vehicle is characterized in that the mounting bracket and the mounted object bracket are formed in an L-shape, and the second bolt that fastens the mounting bracket and the mounted object bracket extends vertically.

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