JP4108208B2 - 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, together with the rear lower member that continuously to the left and right post each rear at both ends of the vehicle frame is water earnestly continuously provided, on the vehicle frame The front member is connected in parallel with the rear lower member at a predetermined interval, and a pair of left and right reinforcing frames extends in the front-rear direction and in parallel with the predetermined distance between the rear surface of the front member and the upper surface of the rear lower member. Erected across Are, furthermore, between the rear end upper surface of the left and right reinforcing frames with lower rear member that continuously to the left and right of the post at both ends, respectively, are bridged, the several suitable between the middle upper surface of the reinforcing frame of the left and right A horizontal joist is installed to support the floor surface of the cargo box with the front member, the horizontal joist and the rear upper member , and the rear end top surface of the vehicle frame, the rear surface of the front member, the rear lower member and the rear upper member. A space enclosed between the left and right reinforcement frames is formed in the storage portion.
[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 a groove (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 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, this support structure has a rear lower member 11, a rear upper member 12, a front member 13, a reinforcing frame 14, a lateral joist disposed at the rear end of the vehicle frame 10, respectively. 15, the floor surface 1 a of the packing box 1 is supported.
[0015]
The rear lower member 11 has a length corresponding to the width of the cargo box 1, and is continuously provided horizontally at the rear end of the vehicle frame 10 in the width direction of the cargo box 1.
[0016]
The front member 13 is connected in parallel to the rear lower member 11 at a predetermined interval on the upper surface near the front of the rear end of the vehicle frame 10.
[0017]
The reinforcing frame 14 is constructed over both ends of the front member 13 and the rear lower member 11. Specifically, each of the left and right reinforcing frames 14 has a front end portion connected to the lower rear surface of the front member 13 and a rear end portion connected to the upper surface of the rear lower member 11. 13 and the rear lower member 11 are disposed in the front-rear direction and horizontally at a predetermined interval.
[0018]
The rear upper member 12 is installed between rear upper surfaces of the left and right reinforcing frames 14, 14. The rear upper member 12 forms a rear member with the rear lower member 11, and the rear upper member 12 and the rear lower member 11 are vertically spaced by the height of the reinforcing frame 14 at the rear end of the vehicle frame 1. Are arranged apart from each other.
[0019]
The both ends of the horizontal joist 15 are connected to the upper surface of the middle part of the left and right reinforcing frames 14. In the illustrated example, the two horizontal joists 15 are arranged at a predetermined interval in the width direction of the packing box 1 and in parallel. Are arranged apart from each other.
[0020]
The upper surfaces of the rear upper member 12, the front member 13, and the horizontal joist 15 described above are arranged on the same horizontal plane, and the floor surface 1 a of the cargo box 1 is formed by the upper surfaces of the rear upper member 12, the front member 13, and the horizontal joist 15. It has a supporting structure.
[0021]
Therefore, the space surrounded by the upper surface of the rear end portion of the vehicle frame 10, the rear surface of the front member 13, the space between the rear lower member 11 and the rear upper member 12, and the left and right reinforcing frames 14 is the storage portion 1b described above (see the oblique line). ) Has been made.
[0022]
The post 2 described above is connected to both ends of the rear lower member 11 and the rear upper member 12.
[0023]
In addition, 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 16 similar to the horizontal joist 15 is provided on the subframe 10a. The front and rear are arranged with a predetermined simplicity. As a result, at the front part of the vehicle frame 1, the floor joist 16 supports the floor surface 1 a of the cargo box 1.
[0024]
By supporting the floor surface 1 a of the cargo box 1 in this manner, the load of the cargo box 1 is passed through the horizontal joists 15, 15, the rear upper member 12, and the front member 13 at the rear end of the car frame 10. In particular, the load applied to each of the horizontal joists 15, 15 is received by the vehicle frame 10 from the left and right reinforcing frames 14 through the front member 13, and from the left and right reinforcing frames 14, the rear upper member 12, the post 2 and the rear lower member. 11 is received by the car frame 10. As a result, the load of the cargo box 1 can be sufficiently dispersed and received by the vehicle frame 10, whereby the cargo box 1 can be stably supported and the strength of the vehicle frame 10 can be prevented from being twisted. A support structure can be achieved.
[0025]
【The invention's effect】
As described above, according to the floor support structure of the cargo box in the cargo handling vehicle equipped with the retractable load receiving device lifting device of the present invention, through the horizontal joists, the reinforcing material, the rear lower member, the rear upper member and the front member, The load of the cargo box can be sufficiently dispersed and received by the vehicle frame, thereby enabling stable support of the cargo box and achieving an excellent support structure that can prevent the vehicle frame from being twisted. In addition, the space of the storage unit can be secured relatively freely.
[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 Back lower member 12 Back upper member 13 Front member 14 Reinforcement frame 15

Claims (1)

Posts are erected on both sides of the rear end of the cargo box mounted on the vehicle frame, and a load receiving table is slidable along the post, and the load receiving table is slidable backward at a predetermined height storage position. In this loading / unloading vehicle equipped with a retractable load receiving device lifting device configured to be stored in a storage portion formed below the floor rear portion of the load box by the slide, with rear lower member that continuously provided at both ends to the respective left and right posts are water earnestly consecutively, the front member in parallel with consecutively spaced above the lower rear member with a predetermined interval on the car frame, these front members face and rear lower member a pair of left and right reinforcing frames over the upper surface of the bridged at a predetermined interval and parallel to the longitudinal direction after the further right and left both ends are between the rear end upper surface of the left and right reinforcing frames On the post Setting the with the lower rear member is bridged, the left and right reinforcing frame in the middle section transverse joists several suitable between upper surface is bridged, supporting the floor of the cargo box at the front members, the transverse joists and rear upper members And a space surrounded by the upper surface of the rear end of the vehicle frame, the rear surface of the front member, between the rear lower member and the rear upper member, and between the left and right reinforcing frames is formed in the storage unit. A floor support structure for a cargo box in a cargo handling vehicle provided with a retractable cargo receiving platform lifting device.

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