JPS6220353Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is based on the idea that a small crane equipped with a boom with a hook hanging from its tip and a hydraulic cylinder that raises and lowers the boom is attached to the loading platform of a truck, and the crane is used to load cargo onto the loading platform of the truck. Related to equipment for loading and unloading.

Conventionally, when installing the crane, the crane was erected on the floor of the loading platform and the crane was supported using the chassis of the truck.
The work of installing the crane on the loading platform of a truck is complicated, and removing the crane causes inconveniences such as holes for this installation being formed in the loading platform, and the position of the crane to be attached to the loading platform is approximately constant. As a result, loading and unloading operations using cranes were restricted, and there were drawbacks such as inconvenience in handling.

The present invention solves the above-mentioned conventional drawbacks by installing a platform frame between the upper edges of the left and right side frame plates that form the truck platform, and making it possible to move the platform forward and backward along the side frame plates. In addition to attaching the platform frame, a crane platform equipped with a boom equipped with a hook at the tip and a hydraulic cylinder for raising and lowering the boom is supported by the platform frame, and is movable in the left and right direction of the loading platform along the platform frame. The crane platform is attached to the truck, and compared to conventional methods, it can be easily incorporated into the truck loading platform without any modification, and cargo can be loaded and unloaded at the desired position on the loading platform, and the truck can be moved during the operation. To provide a cargo loading/unloading device for a truck that can omit troublesome operations such as changing directions and can efficiently load and unload cargo even in a narrow factory.

Embodiments of the present invention will be described in detail below based on the drawings. Figure 1 is an overall perspective view, Figure 2 is a front view of the same,
FIG. 3 is a plan view of the small truck 1, in which an open top box type loading platform 3 is mounted on the main body chassis 2 of the small truck 1, and an engine starting battery 4 is attached to the front side of the main body chassis 2. A pair of substantially parallel platform frames 7, 7 are constructed between the upper edges of the left and right side frame plates 5, 6 forming the loading platform 3, and a pair of left and right sliding frames are mounted on the upper end surfaces of the side frame plates 5, 6. 8 and 9 are provided. As shown in FIG. 4, the side frame plates 5,
The inner lower ends of sliding frames 8 and 9 extend lower than the upper ends of slide frames 8 and 9, and drop-off prevention plates 10 and 10 are integrally formed on the frames 8 and 9, and the wheels are brought into sliding contact with the upper end surfaces of the side frame plates 5 and 6. 11... are freely rotatably supported by the sliding frames 8, 9, and the sliding frames 8, 9
The other end of the connecting plate 12, which has one end fixed to
4, and the space between the left and right side frame plates 5, 6 and the installation width of the left and right sliding frames 8, 9 are made to match, and the base frames 7, 7 and the sliding frames 8, 9 are fixed on a flat surface. A locking lever 15 is pivotally attached to the sliding frames 8 and 9, and an engaging arm 16 that locks to the outer edge of the upper end of the side frame plates 5 and 6 is connected to the lever 15. 16 is removed, move the platform frame 7 toward the rear of the platform 3 along the side frame plates 5 and 6, and move the platform frame 7 to any desired position on the platform 3 by engaging the lever 15 and the arm 16. A stand frame 7 is constructed and fixed between the side frame plates 5 and 6.

Further, a crane stand 22 is provided with telescopic inner and outer booms 19 and 20 having hooks 18 at their tips via a hanging chain 17 whose length can be adjusted freely, and a hydraulic cylinder 21 that swings the booms 19 and 20 up and down. is supported by the stand frame 7. As shown in FIG.
A pin 25 that is freely rotatably supported by the crane base 2 and inserted through the positioning hole 24 on the upper side of the base frame 7 is locked to the crane base 22, and is moved along the base frame 7 with the pin 25 removed. The crane stand 22 is moved in the left-right direction of the loading platform 3, and the crane stand 22 is fixed at an arbitrary position on the stand frame 7 by locking the pin 25. A circular base plate 26 is fixed substantially horizontally on the upper surface of the crane stand 22, a square support 27 is erected on the upper surface of the base plate 26, and a horizontal rotation fulcrum shaft 28 is vertically disposed approximately in the center of the upper surface of the base plate 26. 28 is supported by the pillar 27, and a receiver 29 is rotatably fitted into the fulcrum shaft 28, and one side of the vertical plate 30 is integrally fixed to the receiver 29. The base end of the outer boom 20 is attached to the upper end of the other side of the vertical plate 30 via a shaft 31, and the base end of the hydraulic cylinder 21 is attached to the lower end of the plate 30 via the shaft 32 on the other side, respectively. An electric motor 33 that is freely supported and driven using the battery 4 as a power source, a hydraulic pump 34 that is driven by the motor 33, and the pump 34 and the hydraulic cylinder 2.
An oil tank 35 for supplying one hydraulic oil and a hydraulic switching valve 36 for driving and controlling the hydraulic cylinder 21 constitute a unit and are attached to the middle of the vertical plate 30.

Furthermore, telescopic adjustment holes 37 are opened at the base end of the inner boom 19 that is slidably inserted into the outer boom 20, and a pin 38 that is inserted through the hole 37 is engaged with the tip of the outer boom 20. , 20 to a desired length, a pressure receiving bracket 39 is fixed to the tip of the outer boom 20, and the tip of the piston rod 40 of the hydraulic cylinder 21 is connected to the bracket 39 via a shaft 41.

Also, direction change positioning holes 42 are formed on the same circumference of the substrate 26 centered on the horizontal rotation fulcrum shaft 28, and positioning pins 43 are inserted into the holes 42.
is attached to the vertical frame 30 so as to be movable forward and backward, and as shown in FIG. A direction change operation lever 46 for engaging and disengaging the pin 43 is pivotally supported by the pressure receiving bracket 39, and a pair of left and right lifting levers 44, 44 provided on the same axis are extended below both sides of the outer boom 20, and the above-mentioned A direction change operation lever 46 located between the levers 44, 44 is extended below the outer boom 20, and is formed so that this lifting/lowering and turning operation can be performed at the tip of the outer boom 20.

Next, outrigger brackets 47, 47 each having a U-shaped end face are extended and fixed on both sides of the crane stand 22, and the base end of an L-shaped outrigger frame 48 is pivotally supported on the bracket 47 via a support shaft 49 so as to be able to rise and fall freely. A pin 50 that penetrates the outrigger frame 48 and holds it in an upright or collapsed position is engaged with the outrigger bracket 47. As shown in FIG. 7, a threaded cylinder 5 having a tightening handle 51
2 is screwed onto the tip of the outrigger frame 48 so as to be freely removable, and a cylindrical support leg 54 having a grounding plate 53 at the tip is loosely inserted into the threaded cylinder 52, and a retracting holding hole 55 and an advancing holding hole 56... are formed in the supporting leg 54, and a pin 57 that is selectively inserted into each of the holding holes 55, 56... is engaged in the threaded cylinder 52, and the outrigger frame 48 is attached to the loading platform 3.
The supporting legs 54 are extended to press the grounding plate 53 against the work surface.

Further, a conductive cable 58 is suspended from the tip of the outer boom 20 via the pressure receiving bracket 39,
An operation switch box 59 is provided at the lower end of the cable 58.
At the same time, the rise and fall switches 60 and 61 that turn on and off the electromagnetic solenoid 36a that switches the hydraulic switching valve 36, and the wire 45 are installed.
an electromagnetic solenoid 6 for engaging and disengaging the positioning pin 43 by raising and lowering the outer receiving bracket 62;
Direction change operation switch 6 for turning on and off 3
4 is incorporated into the switch box 59.

The present invention is constructed as described above, and when loading and unloading cargo, first, the platform frame 7 is moved in the front-rear direction of the loading platform 3 by engaging and disengaging the engaging arm 16 using the latch lever 15. By engaging and disengaging the pin 25, the crane platform 22 is moved in the left-right direction of the loading platform 3, and the crane platform 22 is attached and fixed at a desired position on the loading platform 3. In addition, either the left or right outrigger frame 48 is allowed to hang down on the outside of the loading platform 3, the supporting legs 54 are advanced to press against the ground plate 53, and the inner boom 19 is adjusted to expand or contract by engaging and disengaging the pin 38, and is suspended. chain 17
Adjust the length of the hook 18 and hang it at the desired position. Then, the inner and outer booms 19 and 20 are raised and lowered by driving the hydraulic cylinder 21 using the lift lever 44 or the rise and fall switches 60 and 61, and the load to be hooked on the hook 18 is lifted or lowered, and the direction change operation lever is activated. 46 or the direction change operation switch 64 to rotate the booms 19 and 20 by engaging and disengaging the pin 43;
This is for loading or unloading cargo onto or from the loading platform 3 of the truck 1.

As is clear from the above embodiments, the present invention has a platform frame 7 installed between the upper edges of the left and right side frame plates 5 and 6 forming the loading platform 3 of the truck 1, and The crane platform 22 is equipped with the platform frame 7 movable in the front and back direction of the loading platform 3, and is provided with booms 19, 20 having hooks 18 at their tips and a hydraulic cylinder 21 for raising and lowering the booms 19, 20. The crane platform 22 is supported by the platform frame 7 and is mounted so as to be movable in the left and right direction of the loading platform 3 along the platform frame 7, and can be easily incorporated into the loading platform 3 of the truck 1 without any modification work compared to the conventional method. It is possible to carry cargo platform 3
Loading and unloading work can be carried out at the desired location, and troublesome operations such as changing the direction of truck 1 during the work can be omitted, allowing for efficient loading and unloading of goods even in a narrow factory. It has remarkable effects such as being highly practical and practical.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a front view of the same, FIG. 3 is a plan view of the same, and FIGS. 4 to 7 are partially enlarged sectional views. 1... Truck, 3... Loading platform, 5, 6... Side frame plate, 7... Stand frame, 18... Hook, 19,
20...Boom, 21...Hydraulic cylinder. 22...
...Crane stand.

Claims (1)

[Scope of utility model registration request] A platform frame is installed between the upper edges of the left and right side frame plates forming the loading platform of the truck, and the platform frame is attached so as to be movable in the front and back direction of the loading platform along the side frame plates, and a hook is installed at the tip. A crane stand provided with a boom to move the load and a hydraulic cylinder for raising and lowering the boom is supported by the stand frame, and the crane stand is configured to be movable in the left and right direction of the loading platform along the stand frame. Loading and unloading equipment for trucks.