JPH0427725Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a freight vehicle equipped with a platform that can be raised and lowered horizontally while carrying cargo.

(Prior Art) For example, as disclosed in Japanese Utility Model Publication No. 55-36270, a freight vehicle is equipped with a lift device at the rear of the vehicle that raises and lowers the platform while maintaining it in a horizontal state via a parallelogram link mechanism. During cargo handling, the platform rises and falls horizontally, making loading and unloading of cargo easier. At the end of cargo handling, the horizontal platform rises and lowers.
It can stand up vertically and double as a rear door. Such liftable platforms are normally located at the rear of the cargo bed, but may also be mounted on the sides of the cargo bed, or a single platform may swivel from the rear to the side so that the platform can be mounted on the side of the cargo bed. There is one that is designed to carry out cargo handling work.

If such a platform is installed at the rear of the cargo bed, the heavy engine is located at the front of the vehicle, so even if a heavy load is placed on the platform and the platform is lifted or lowered, the vehicle will rarely tilt toward the rear. If a platform is installed on the side of a loading platform, if a heavy load is placed on this platform, the weight of the platform will cause the vehicle to tilt toward the platform, centering on the tires on the platform side, and the horizontal platform will also tilt, causing the load and cargo to be There was a problem in that cargo handling work was extremely dangerous due to workers falling.

Therefore, as disclosed in Japanese Patent Publication No. 26-3354, a hollow support is provided on one side of the loading platform, and a jack is installed inside the hollow support so that it can be raised and lowered by operating a handle. It is conceivable to position and hold the jack by inserting a pin into a drilled pin insertion hole, and to use this jack to prevent the loading platform from tilting during loading and unloading. In addition, as disclosed in Japanese Utility Model Publication No. 49-38813, a screw shaft is provided in the support leg, and an elevating mechanism consisting of a combination of a bevel gear and a pinion is provided, and the vehicle can be raised and lowered by rotating the handle. It is also conceivable to use support legs.

(Problem to be solved by the invention) In the former prior art, in order to prevent the jack from rising, a pin is inserted into a pin insertion hole drilled in each of the hollow support and the jack. It is difficult to insert the pin unless the position of the pin insertion hole is aligned accurately, and furthermore, the inserted pin is subjected to forces in the vertical direction from the hollow support and the jack through both pin insertion holes, so in this state, the The pin cannot be pulled out smoothly and requires the troublesome work of aligning both pin insertion holes again using the handle of the jack before pulling it out. There was a drawback that the workability of this release was extremely poor. In addition, in the latter prior art, multiple complicated mechanisms such as screw shafts, bevel gears, and pinions are required to raise and lower the support legs, and the rotation of the handle is controlled via a pair of bevel gears. The transmission is transmitted to the screw shaft to raise and lower the support leg, and since the support leg is raised and lowered little by little as the handle is rotated, it takes time to raise and lower it, resulting in poor operability.

The present invention has been developed based on the above-mentioned problems, and it is possible to prevent the vehicle from tilting even when carrying out cargo handling using a platform provided on the side of the loading platform, thereby making it possible to carry out safe cargo handling operations. It is an object of the present invention to provide a freight vehicle that has excellent operability in raising and lowering a ground support rod, and in which the ground support rod can be easily fixed to the ground and released.

(Means for Solving the Problems) The present invention includes a platform that is movable up and down on the side of the loading platform of a freight vehicle, a ground support bar that is movable up and down on the platform side of the loading platform, and A weight that is connected to the ground support rod via a connecting body and moves up and down in opposite directions while being in balance with the ground support rod, a ratchet gear that responds to the up and down movement of the ground support rod via a rack and a pinion, and the ground support rod. The device is provided with a ratchet pawl that engages with the ratchet gear so as to prevent the ratchet from rising, and an operating member that releases the engagement of the ratchet pawl.

(Function) After cargo handling, lower the ground support rod to the ground or near the ground, and fix it so that it does not rise above the ratchet gear, ratchet pawl, rack, pinion, etc.
Even if a heavy load is placed on the platform and the vehicle tries to tilt toward the platform, the ground support rod supports the vehicle and prevents the vehicle from tilting. Furthermore, the ground support rod can be raised by disengaging the ratchet pawl from the ratchet gear using the operating member. Furthermore, the ground support rod is balanced with the weight and can be raised and lowered manually with less force.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 3, a cargo box 2 is provided at the rear of a freight vehicle 1. As shown in FIGS. Loading ports 3 and 4 are opened at the rear and side portions of the cargo box 2, respectively, and a double-opening rear door 5 and a single-opening side door 6 are pivotally mounted to be openable and closable, respectively. A lock rod 7 is rotatably provided on the outer surface of the rear door 5 by a pivot joint 8, and cams 10 provided at both ends of the lock rod 7 are operated by operating a handle 9 pivoted to the lock rod 7.
is configured to be able to engage and disengage from a cam receiver (not shown) on the peripheral edge of the cargo box 2. Although not shown, the side door 6 is also provided with a door lock mechanism. A lift device 13 consisting of a parallelogram-shaped link mechanism 11, a hydraulic cylinder 12, etc. is provided on the vehicle body below the rear loading port 3 and the side loading port 4, respectively.
The platform 14 is configured to be vertically movable while keeping it in a horizontal state. Furthermore, this lift device 1
3, the platform 14 can be stored below the cargo box 2 or erected vertically to accommodate the cargo vehicle 1.
The structure is such that there is no hindrance to the running of the vehicle.

The rear door frame 15 of the cargo box 2 is formed from a hollow square timber, and the vertical frame 1 on the side platform 14 side
6 is open at the lower end, and has a ground support rod 17 disposed therein so as to be movable up and down. The upper end of this grounding support rod 17 is suspended from one end of a belt 18 or wire serving as a connecting body, and the belt 18 is installed on pulleys 20 provided at both ends of the horizontal frame 19 of the door frame 15, so that the vertical frame 21 on the other side can be raised and lowered. The other end of the belt 18 is fixed to a weight 22, and the weights of the weight 22 and the ground support rod 17 are substantially balanced to reduce the force when the ground support rod 17 is raised. . A horizontal ground plate 24 having a U-shaped handle 23 on its upper surface is fixed to the lower end of the ground support rod 17. Also, on the side of the ground support rod 17, there is a rack 25 with continuous teeth in the vertical direction.
is provided. A box 27 having an opening 26 formed therein so as to communicate with the vertical frame 16 is fixed to the lower part of the vertical frame 16. A first gear 28 as a pinion that meshes with the rack 25 is rotatably provided in the box 27 by a shaft 29, and a second gear 30 that meshes with the first gear 28 is rotated by a shaft 31. A ratchet gear 32 is fixed to this shaft 31, and a ratchet pawl 33 capable of locking this ratchet gear 32 is rotatably provided on a shaft 34. The ratchet pawl 33 is engaged to prevent the ratchet gear 32 from rotating in the direction opposite to the arrow B, and as a result, while the ratchet pawl 33 is engaged with the ratchet gear 32, the ground support rod 17 cannot rise. Further, the box 27 is provided with a bullet 35 that urges the ratchet pawl 33 to mesh with the ratchet gear 32.
A lever 36, which is an operating member for releasing the ratchet engagement, is fixedly provided on the shaft 34 outside the shaft 7. At the lower end of the box 27, a lock frame 38 having a U-shaped cross section and an opening 37 on the lower surface is provided. A locking rod 39 is rotatably mounted on the locking frame 38. This locking rod 39 is always connected to the opening 37.
A lever 41 is connected to the ammunition 40 to close the opening. The operation of the present invention constructed as above will be explained next.

When carrying out cargo handling work using the platform 14 on the side of the cargo box 2, the ground support rod 17, which had been housed within the vertical frame 16, is lowered. At this time, first, the lever 41 is rotated in the direction of the arrow in FIG. 2 to raise the locking rod 39 and push the grounding support rod 17 downward while keeping the opening 37 open. Since the ratchet pawl 33 is engaged with the ratchet gear 32 so that the ratchet gear 32 and the second gear 30 can be rotated in the direction of the arrow B, the first gear 28 can be rotated in the direction of the arrow C. 17 can be freely lowered, and its ground plate 24
ground to the ground. Conversely, the ratchet pawl 33 meshes with the ratchet gear 32 and the ratchet gear 32 cannot rotate in the direction opposite to the arrow B, so the ratchet mechanism locks the ground support rod 1.
7 cannot be raised and is fixed to the vertical frame 16, that is, the cargo box 2. Therefore, even if a heavy load is placed on the side platform 14,
Since this ground support rod 17 is in contact with the ground and supports the cargo box 2, it is possible to prevent the truck 1 from tilting toward the platform 14 around the tires on the platform 14 side of the truck 1.
In this way, when carrying out cargo handling work using the side platform 14, the ground support rod 17 acts as a holding rod to prevent the truck 1 and the platform 14 from tilting even when heavy loads are loaded. Since there are no Further, since the grounding support rod 17 is easily fixed to the vertical frame 16 by a fixing means such as a ratchet mechanism, an expensive hydraulic cylinder or the like is not required.

On the other hand, in order to raise this ground support rod 17,
When the lever 36 is rotated by hand to release the ratchet pawl 33 from the ratchet gear 32 and the ground support rod 17 is moved upward, the weight 22 as a balancer is lowered and easily raised with less force. Since this ground support rod 17 supports the cargo box 2, it is made of a metal frame or the like and is quite heavy, so by counterbalancing it with a weight 22, the lifting force can be reduced, making the lifting work easier. When the ground support rod 17 rises to its upper limit, the handle 23 pushes up the lock rod 39 and enters the lock frame 38.
Because the locking rod 39 closes the opening 37 again due to the biasing force of the ammunition 40, the handle 23 closes the locking frame 38.
Although the ground support rod 17 can be freely lowered, it is securely locked to prevent it from lowering due to vibrations or the like while the vehicle is running.

Above, one embodiment of the present invention has been described in detail.
It can be modified as appropriate within the scope of the gist of the present invention. For example, in the above embodiment, the platform 14 is provided at the side and rear part of the cargo box 2, but the platform 14 may be provided on at least one side. It can be applied to freight vehicles equipped with a possible platform. moreover,
The ground support rod 17 can also be attached to the front frame of the cargo box 2, and it is more effective to provide it at the front and rear. Furthermore, if there are platforms on both sides of the cargo box 2 or if it is pivotable, ground support rods 17 can be provided on both sides. Further, the ground plate 24 does not necessarily need to be grounded on the ground, but may be arranged such that the cargo box 2 is tilted to some extent due to the weight of the cargo on the platform 14, so that the ground plate 24 is grounded and supported. Furthermore, the cargo box may also be a loading platform. Also,
A ratchet gear can also be provided on the shaft of the first gear. Furthermore, FIG. 4 shows a truck equipped with a crane 42, and a vertical frame 44 is provided at the front and rear sides of a loading platform 43, and a ground support rod 45 is provided on this vertical frame 44 so as to be able to rise and fall. In this way, the truck can be supported with an inexpensive device, unlike the method in which a hydraulic cylinder is provided to lift the outrigger.

[Effects of the invention] As detailed above, the present invention includes a platform provided on the side of the loading platform of a freight vehicle so as to be movable up and down, and a ground supporting rack installed on the platform side of the loading platform so as to be movable up and down. , a weight connected to the grounding support rod via a connecting body and moving up and down in opposite directions while balancing with the grounding support rod; a ratchet gear that responds to the lifting and lowering of the grounding support rod via a rack and a pinion; It is equipped with a ratchet pawl that engages with the ratchet gear to prevent the support rod from rising, and an operating member that releases the engagement of the ratchet pawl, and the platform provided on the side of the cargo platform can be used for cargo handling work. To provide a freight vehicle that prevents the vehicle from tilting even when the vehicle is tilted, enables safe cargo handling work, has excellent operability of the ground support rod, and allows the ground support rod to be easily fixed to the ground and its face. can do.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view of a main part, and FIG. 3 is a sectional view taken along the line A--A in FIG. 2. 2... Loading box (loading platform), 14... Platform,
17... Ground support rod, 18... Belt (connection body),
22... Weight, 28... Gear (pinion), 32...
...Ratchet gear, 33...Ratchet pawl, 36
...Lever (operating member).

Claims (1)

[Scope of utility model registration request] A platform provided on a side of a loading platform of a freight vehicle so as to be movable up and down, a grounding support rod provided on a side of the loading platform so as to be movable up and down, and connected to the grounding support rod via a connecting body. A weight that balances with the ground support rod and moves up and down in the opposite direction,
A ratchet gear that responds to the raising and lowering of the ground support rod via a rack and pinion, a ratchet claw that engages with the ratchet gear so as to prohibit the rise of the ground support rod, and an operating member that disengages the ratchet claw. A freight vehicle characterized by comprising: