JP4094154B2 - Floor support structure for cargo boxes in a cargo handling vehicle equipped with a retractable loading platform lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor support structure for a cargo box in a cargo handling vehicle provided with a retractable cargo cradle lifting device in which a cargo cradle can be retracted by sliding forward and backward in a storage part formed below the floor of the cargo box.
[0002]
[Prior art]
Conventionally, as a floor support structure for a cargo box in a cargo handling vehicle equipped with this type of retractable cargo receiver lifting device, as shown in FIG. 3, reinforcing members b are respectively provided around the outer side surfaces of a pair of left and right vehicle frames a, a. The support frames c are provided so as to project laterally, and a support frame c is installed between the front and rear ends of the left and right front and rear reinforcement members b, and the pair of left and right support frames c are placed in parallel in the front-rear direction. The floor d1 of the load box d is mounted and supported on the space, and a space formed corresponding to the height of the left and right support frames c is formed in the storage portion e. The stand was made retractable.
[0003]
[Problems to be solved by the invention]
However, since the reinforcing members b are supported in a cantilevered state on the outer surface of the vehicle frame a in the above-described conventional one, the load of the packing box d is transmitted through the reinforcing member b. This acts locally on the connecting portion of the continuous vehicle frame a, thereby causing a twist of the vehicle frame a and a problem in terms of strength for supporting the cargo box d.
[0004]
[Means for Solving the Problems]
The floor support structure for a cargo box in a cargo handling vehicle equipped with a retractable cargo cradle lifting / lowering device according to the present invention has posts erected on both sides of the rear end of the cargo box mounted on the vehicle frame, and the cargo cradle along the post. Is provided so that it can be moved up and down, and a load receiving table is slidable rearward at a storage position at a predetermined height, and the load receiving table is stored in a storage portion formed below the rear portion of the floor surface of the load box by this sliding. in cargo handling vehicle having a configured retractable receiving platform lifting device as the rear end of the vehicle frame, with the rear lower members are water earnestly consecutively were continuously provided to the respective left and right posts at both ends, this A rear upper member is provided above the rear lower member at a predetermined interval and provided in parallel with the rear lower member with both ends connected to the left and right posts, respectively , while the front member is disposed in the middle of the upper surface of the vehicle frame. Rear upper Parallel to consecutively at a bus a predetermined distance, the vertical reinforcing frame of the plurality book is bridged in a longitudinal direction over the front surface and the rear upper member after these front members, the vertical reinforcing frame, the front member and rear upper members And a structure that supports the rear portion of the floor surface of the packing box, and a horizontal space portion from the opening formed between the rear upper member and the rear lower member to the front member is formed in the storage portion. It is.
In the present invention, a horizontal joist is provided in the middle of the plurality of vertical reinforcing frames in the width direction of the packing box.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0006]
FIG. 1 shows the overall configuration of a cargo handling vehicle equipped with a retractable cargo receiving table lifting device.
In this retractable load receiving table lifting device, sliders 3 are provided in a pair of left and right posts 2 erected on both sides of the rear end of the cargo box 1 so as to be movable in the vertical direction along the posts 2. 3 is a vertical lifting type that lifts and lowers the load receiving table 4 supported by the lower end of the slider 3 by the movement of the slider 3.
[0007]
Rollers 31 are respectively provided at the upper end portion and the middle portion of the slider 3, and the rollers 31 roll in the post 2 so that the slider 3 can smoothly move in the vertical direction in the post 2.
[0008]
Both sides of the base end portion of the load receiving platform 4 are supported by the sliders 3 via support members 5. A bracket 32 connected to the lower end of the slider 3 is pivotally supported on the support member 5.
[0009]
Further, a roller 51 is disposed on the support member 5, and the roller 51 is fitted and disposed in grooves (not shown) formed on both sides of the load receiving base 4 so as to be freely rotatable. The load receiving platform 4 is supported by 51 so as to be slidable back and forth.
[0010]
Further, one end 61 of the link member 6 is rotatably supported on both sides from the front end of the load receiving platform 4, and the other end of the link member 6 is connected to the upper end of the slider 3. One end of the wire 7 fixed to is connected. In this manner, the wire 7 and the link member 6 are stretched between the upper end portion of the slider 3 and the tip end portion of the load receiving table 4, so that the load receiving table 4 arranged at the working position as shown in FIG. Can be held.
[0011]
In addition to the lower end of the slider 3, the left and right brackets 32 are connected to the tip of a rod 81 of a hydraulic cylinder 8 that is suspended in parallel with the post 2. The left and right hydraulic cylinders 8 are configured to be able to expand and contract in synchronization with an appropriate hydraulic circuit.
[0012]
In the load receiving platform lifting apparatus configured as described above, the load receiving stand 4 is stored in the storage portion 1b formed below the rear portion of the floor surface 1a of the load box 1 at the storage position having a predetermined height shown in FIG. The storage position and the work position (see the solid line in FIG. 1) extending rearward from the packing box 1 can be placed, and after the load receiving platform 4 is placed at the work position, the hydraulic cylinder 8 is synchronized to extend and retract. By doing so, as shown by a one-dot chain line in FIG. 1 in a state where the load receiving platform 4 is held horizontally, it can be moved up and down between the highest position that is substantially flush with the floor surface 1a of the packing box 1 and the ground. .
[0013]
By the way, the rear part of the floor surface 1a of the cargo box 1 described above is supported on the vehicle frame 10 of the cargo handling vehicle by a support structure described below.
[0014]
As shown in FIG. 2, the support structure mainly includes a rear upper member 12, a front member 13, and a vertical reinforcing frame 14 disposed on the rear end portion of the vehicle frame 10, mainly on the rear portion of the floor surface 1a of the cargo box 1. It was made to support. Hereinafter, the support structure will be specifically described.
[0015]
A rear lower member 11 having a length corresponding to the width of the cargo box 1 is connected to the rear end of the vehicle frame 10 horizontally in the width direction of the cargo box 1.
[0016]
The rear upper member 12 constitutes a rear member with the rear lower member 11, and both ends of the rear upper member 12 are connected between the left and right side walls of the cargo box 1. Is arranged in parallel with the rear lower member 11 with a vertical distance of a height necessary for storing the rear member 11.
[0017]
The front member 13 is connected in parallel with the rear upper member 12 at a predetermined interval on the upper surface near the front of the rear end, which is the middle part of the vehicle frame 10.
[0018]
The vertical reinforcing frame 14 is constructed over the front member 13 and the rear upper member 12. Specifically, the front end of the vertical reinforcing frame 14 is connected to the upper part of the rear surface of the front member 13, and the rear end of the vertical reinforcing frame 14 is connected to the front surface of the rear upper member 12. Thus, a pair is arranged on the left and right sides with a predetermined interval.
[0019]
In addition, a horizontal joist 15 is provided in the middle of the vertical reinforcing frame 14 in the width direction of the packing box 1.
[0020]
The horizontal joists 15 are composed of the left and right vertical reinforcing frames 14 and divided members 15a, 15b, 15c connected between the vertical reinforcing frames 14 and the side walls of the packing box 1. In the illustrated example, Two horizontal joists 15 are arranged in parallel at a predetermined interval.
[0021]
Further, auxiliary frames 16 are installed over both ends of the front member 13 and the rear lower member 11. Specifically, the left and right auxiliary frames 16 are connected at the front end to the rear lower portion of each end portion of the front member 13 and the rear end on the upper surface of each end portion of the rear lower member 11. 11 and the rear upper member 12 are connected in series, and are thus arranged in the front-rear direction and in parallel along the inner surfaces of the left and right side walls of the packing box 1.
[0022]
The upper surfaces of the rear upper member 12, the front member 13, the vertical reinforcing frame 14, and the horizontal joist 15 are arranged on the same horizontal plane. As a result, the rear upper member 12, the front member 13, the vertical reinforcing frame 14, and the horizontal joist are arranged. Each of the upper surfaces of 15 is configured to support the rear portion of the floor surface 1a of the packing box 1.
[0023]
Further, the horizontal space from the opening formed between the rear lower member 11 and the rear upper member 12 to the rear lower portion of the front member 13 is formed in the storage portion 1b (see the oblique lines) described above. The receiving platform 4 is stored in the formed storage unit 1b.
[0024]
In the storage portion 1b, a guide (not shown) for guiding the movement of the cargo receiving table 4 in the front-rear direction is provided as necessary. As the guides, for example, rail-like ones that slidably support the left and right side portions of the load receiving platform 4 are arranged in a pair of left and right, and the load receiving platform 4 is moved back and forth along this guide, so that the load receiving platform 4 4 can be smoothly moved in the front-rear direction.
[0025]
The post 2 described above is connected to both ends of the rear lower member 11 and the rear upper member 12.
[0026]
Further, a rear end of a pair of left and right subframes 10a provided on the vehicle frame 10 is connected to the front side from the front member 13, and a horizontal joist 17 similar to the horizontal joist 15 is provided on the subframe 10a. It is arrange | positioned at predetermined intervals in front and back. As a result, at the front portion of the vehicle frame 1, the floor joist 17 supports the floor surface 1 a of the cargo box 1.
[0027]
By taking such a support structure, the structural strength in the front-rear direction of the packing box 1 is mainly borne by the vertical reinforcing frame 14 and the auxiliary frame 16 as an auxiliary, and also with respect to the width direction of the packing box 1. The structural strength is mainly borne by the front member 13, the rear upper member 12, and the rear lower member 11, and the side joist 15 is supplementarily borne.
[0028]
Further, the load of the cargo box 1 at the rear end portion of the vehicle frame 10 is received by the vehicle frame 10 through each horizontal joist 15, the vertical reinforcement frame 14, the rear upper member 12, and the front member 13. The load applied to the frame 14 is received by the vehicle frame 10 from the vertical reinforcing frame 14 through the front member 13 and is received by the vehicle frame 10 from the vertical reinforcing frame 14 through the rear upper member 12, the post 2 and the rear lower member 11. As a result, the load of the cargo box 1 can be sufficiently dispersed and received by the vehicle frame 10. As a result, the cargo box 1 can be stably supported, the vehicle frame 10 can be prevented from being twisted, and a support structure excellent in strength can be obtained.
[0029]
In the present embodiment, the case where the vertical reinforcing frames 14 are arranged in a pair on the left and right has been described. However, the number of the vertical reinforcing frames 14 is not limited to the pair on the left and right, and may be three or more.
[0030]
Further, when it is necessary to reinforce strength, the lateral joists 15 and the reinforcing frame 16 may be provided as ancillary as necessary, and are not necessarily constituent members for configuring the present invention.
[0031]
【The invention's effect】
As described above, according to the floor support structure for a cargo box in a cargo handling vehicle equipped with a retractable cargo receiver lifting device according to the present invention, the load on the cargo box is passed through the longitudinal reinforcing member, the rear upper member, and the rear lower member. And it can be received by the vehicle frame by being sufficiently dispersed by the front member. As a result, the cargo box can be stably supported, the vehicle frame can be prevented from being twisted, and a support structure with excellent strength can be achieved, and the space of the storage portion can be secured relatively freely. it can.
[Brief description of the drawings]
FIG. 1 is a side view showing an overall configuration of a cargo handling vehicle provided with a retractable cargo receiving table lifting device.
FIG. 2 is a perspective view showing a floor support structure for a packing box.
FIG. 3 is a rear view showing a conventional floor support structure for a packing box.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packing box 1a Floor surface 1b Storage part 4 Cargo stand 10 Car frame 11 Rear lower member 12 Rear upper member 13 Front member 14 Vertical reinforcement frame

Claims (2)

Posts are erected on both sides of the rear end of the cargo box mounted on the car frame, and a load receiving table is provided to be raised and lowered along the post, and the load receiving table is provided to be slidable rearward at a storage position at a predetermined height. In this loading / unloading vehicle equipped with a retractable load receiving and lifting device configured to be stored in a storage portion formed below the floor rear portion of the load box by the slide, a load handling vehicle is provided at the rear end of the vehicle frame. is continuously provided at both ends with the lower rear member that continuously to the left and right post each is water earnestly consecutively, to the rear lower member by a predetermined distance behind the upper member upwardly spaced the left and right both ends respectively post and it provided in parallel with the rear lower member, the other hand, the upper surface middle portion of the vehicle frame front member in parallel with consecutively spaced the rear upper member by a predetermined distance, surface and rear upper members after these front members Vertical reinforcement frame of the plurality book is bridged in a longitudinal direction over the the front, vertical reinforcing frame, with be made to the structure supporting the floor rear portion of the luggage box in the front member and the rear upper member, the upper rear member and the rear Supporting the floor surface of a cargo box in a cargo handling vehicle equipped with a retractable cargo receiver lifting device, wherein a horizontal space portion from an opening formed between the lower member and the front member is formed in the storage portion Construction. The floor of a cargo box in a cargo handling vehicle equipped with a retractable cargo receiver lifting device according to claim 1, wherein a horizontal joist is arranged in the middle of the plurality of vertical reinforcing frames in the width direction of the cargo box. Surface support structure.

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