JPH0138154Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention rotatably supports a fork behind the aircraft body via a rotation fulcrum shaft on the left and right masts installed on a bogie, and the fork and the fork are A master cylinder is provided between the fork and the fork to rotate and lift the fork around the fulcrum shaft, and for example, a box pallet containing parts of various devices can be loaded on the top of the fork and transported, and it can be moved to any height. The present invention relates to a cargo handling vehicle that lifts and supports the box pallet.

``Prior art'' Conventionally, this type of cargo handling vehicle lifts the box pallet to the floor by rotating and raising the fork inserted into the box pallet around a rotating fulcrum shaft fixed horizontally to the left and right masts. Since the box pallet is designed to be lifted and supported from a surface, there was a problem in that the legs of the box pallet would damage the floor surface when the fork began to rotate and rise.

In order to solve the above-mentioned problems, a technique was developed in which a fork inserted into a box pallet is once raised horizontally, and then the fork is rotated and raised from that raised position.

``Problem that the invention attempts to solve'' However, as a means of achieving this, the rotation fulcrum shaft and the fork are separated, and the fulcrum shaft is horizontally fixed to the left and right masts as before, while the fork is attached to the left and right masts by the upper and lower rollers. In order to rotate and raise the fork around the fulcrum shaft by supporting the fork so that it can rise and fall vertically through the fork, and by engaging and fixing the upper roller to the fulcrum shaft at the highest position of the fork,
This means that the fork's rotational support structure and vertical vertical lifting structure are provided separately, and a disengagement mechanism between the rotational fulcrum shaft and the upper roller is also required, which increases the number of parts and complicates the structure. There are problems in terms of production, cost, and maintenance, and there is also the problem that it is difficult to easily incorporate the vertical vertical lift structure into the conventional structure.

``Means for Solving the Problems'' However, the present invention forms a vertical guide groove in the upper part of the back side of the mast, and fits into this guide groove so as to be able to slide up and down, thereby supporting the fulcrum shaft on the left and right sides. Rollers that are supported by the mast so that they can rise and fall are rotatably fitted to both ends of the fulcrum shaft, and the fork is supported horizontally at the lowest position of the fulcrum shaft, while the fork is moved toward the rear of the aircraft when the fulcrum shaft is at the highest position. It is configured to rotate.

``Function'' Therefore, according to the present invention, the rotation fulcrum shaft of the conventional structure that rotatably supports the fork toward the rear of the aircraft on the left and right masts is used as is, and this rotation fulcrum shaft is attached to the left and right masts with guide grooves. Since it is attached so that it can be vertically raised and lowered via rollers, it has an extremely simple structure and allows the conventional fork rotating support structure to have a vertically raised and lowered function without increasing costs.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is a partially enlarged explanatory view of the main parts, Fig. 2 is a side view of the whole, Fig. 3 is a plan view of the same, and Fig. 4 is an enlarged sectional side view of the same. A pair of left and right legs 4, 4 whose rear end sides are integrally connected via
A front running wheel 5 is provided on the tip side of each, and
A mast 6 is erected and fixed on the upper surface of the rear end of the legs 4, 4, and a support arm 7 is provided behind the left and right masts 6.
It is a forked fork-shaped truck that is provided with rear running wheels 8, which are swivel wheels, respectively.

In the figure, 9 is a brake of the truck 1 provided on either the left or right side of the rear wheel 8, and 10 is a push/pull operation of the truck 1 whose both ends are integrally connected to the upper portions of the left and right masts 6, 6 and which extend rearward. It is a handle for use.

Further, reference numeral 11 in the figure includes a pair of left and right fork parts 12, 12 which are placed over the legs 4, 4 from above so that their tips protrude forward. This is a two-pronged fork that is integrally connected through the fork, and the rear frame 14 is erected and fixed on the upper surface of the fork.

A pair of left and right fork support arms 15, 15 are protruded and fixed to the rear surface of the rear frame 14, and a bearing pipe 16 is provided between the arms 15, 15.
are horizontally fixed, and a rotation fulcrum shaft 17 whose both ends are supported by the left and right masts 6, 6 is inserted and fixed into the pipe 16 by means described later, and the left and right masts 6,
6 to rotatably support a fork 11 at the rear of the fuselage.

In the figure, reference numeral 18 denotes a cover that has both side edges fixed to the upper parts of the arms 15, 15 and covers the upper rear part of the back frame 14.

In addition, 19 in the figure is a jacking device, which is equipped with an oil passage forming base 20 and has an oil tank 2 disposed on the same axis.
1, a master cylinder 22, and a plunger pump 23 for supplying pressure oil to the cylinder 22 are installed upright on the upper surface of the base 20, and the cylinder 2
A pressure relief valve 24 is provided on one side of the base 20 for removing the pressure oil. A lever rod 25 for driving the pump 23 is swingably supported on the tank 21 via a pair of left and right brackets 26, and a pumping handle 28 is attached to the lever rod 25 via a meshing joint 27 which is a support shaft. By connecting only the handle 28 clockwise around the joint 27 and supporting it vertically, the handle 28 can be stored at the rear of the fuselage, while being connected to the lever lever 25 through the mesh joint 27. The lever lever 25 and the handle 28 are integrally swung by pressing down the horizontally positioned handle 28, which is fixed together, in a counterclockwise direction by stepping on the lever, thereby driving the plunger pump 23.

An intermediate operating lever 31 of the pressure relief valve 24 is supported on the upper part of the oil tank 21 via a bracket 30.

A pair of left and right jack support plates 32, 32 are integrally connected approximately at the center between the horizontal frames 2, 3, and a pair of left and right jack support arms 33, 33 is protruded and fixed, while the base 2
A pair of left and right brackets 34, 34 are protruded and fixed on the lower surface of the cylinder 22, and a boss 3 is attached to the tip of the ram piston 35 of the cylinder 22 via a support cap 36.
7 are integrally connected, the brackets 34, 34 are faced between the support plates 32, 32, and these are rotatably connected via the lower support shaft 38, and the boss is connected between the support arms 33, 33. 37 and are rotatably connected via the upper support shaft 39, a jacking device 19 is interposed between the truck 1 and the fork 11, and the fork 11 is rotated around the rotation support shaft 17. The rotation is increased and the rotation is decreased.

As shown in FIGS. 1 and 5, a vertical guide groove 41 is formed at the upper part of the back side of the left and right masts 6, 6 through a frame 40, and rollers are formed at both ends of the rotation fulcrum shaft 17. 42 is provided rotatably, the roller 42 is fitted and supported in the guide groove 41 so as to be vertically slidable, and both ends of the fulcrum shaft 17 are supported by the left and right masts 6, 6 so as to be movable up and down. The fork 11 is configured to vertically move up and down in a horizontal state.

In the figure, 43 is a cover plate for closing the outside of the guide groove 41, 44 is a cap for closing an opening 45 opened in the cover plate 41 and into which the rotation fulcrum shaft 17 is inserted, and 46 is a cover plate for closing the outside of the guide groove 41.
are the lower surfaces of the frame 40, and the left and right masts 6,
It is a horizontal beam that spans between 6 rooms.

As shown in FIG. 6, a nylon shoe 48 is fitted and fixed on the outside of a circular seat plate 47 that protrudes and is fixed to the lower front side of the masts 6, 6.
The lower part of the rear surface of the rear frame 14 is brought into sliding contact with the rear frame 14, so that the fork 11 can be vertically raised and lowered smoothly.

This embodiment is constructed as described above, and the trolley 1
The fork 11 is moved and inserted, for example, into a box pallet for storing assembled parts of various devices, and the fork 11 is slightly lifted by the jacking device 19 to transport the box pallet.

Further, the fork 11 inserted into the box pallet is pushed against the roller 42 at the lower end position of the guide groove 41.
It is supported by the left and right masts 6, 6 in a horizontal state by a rotation fulcrum shaft 17 which is supported via a rotation fulcrum shaft 17.

When the fork 11 is lifted up from the above state via the jacking device 19, the rotation fulcrum shaft 17 is vertically raised via the roller 42 to the upper end position of the guide groove 41. At this time, the fork 11 rises vertically in a horizontal state and becomes the state shown by the imaginary line A in FIG. 2, and in this state, the box pallet is lifted horizontally from the floor and supported and can be transported.

Further, through the jacking device 19, the fork 11
When the roller 4 is lifted up, the upper end of the guide groove 41
The fork 11 begins to rotate upward toward the rear of the machine body around the rotation fulcrum shaft 17, which is supported in contact with the fork 17 via the fork 2, and is sequentially displaced to virtual lines B, C, and D in FIG.

In this way, by vertically raising the fork 11 in a horizontal state before rotating and raising the fork 11 to the rear of the machine body, the legs of the box pallet will not damage the floor surface when the fork 11 starts rotating and raising.

Furthermore, by varying the rotational and rising angle of the fork 11 in accordance with the amount of parts to be stored in the box pallet, the parts can be easily taken out and processing and assembly operations can be carried out efficiently.

Incidentally, when the fork 11 rotates upward to the state indicated by the virtual line D in FIG. 2, as shown in FIG.
The fork support arms 15, 15 are brought into contact with the handle 10 to prevent the fork 11 from rotating upward, thereby preventing the aircraft from falling backward, and also preventing the ram piston 35 from coming out of the master cylinder 22. ing.

"Effects of the Invention" As is clear from the above embodiments, the present invention rotatably supports the fork 11 at the rear of the fuselage via the rotation fulcrum shaft 17 on the left and right masts 6, 6 installed upright on the bogie 1. In addition, in a structure including a master cylinder 22 between the truck 1 and the fork 11 to rotate and lift the fork 11 around the fulcrum shaft 17, a vertical guide is provided at the upper part of the back side of the masts 6, 6. While forming the groove 41,
A roller 42 is fitted into the guide groove 41 so as to be slidable up and down and allows the fulcrum shaft 17 to be movably supported by the left and right masts 6, 6. A roller 42 is rotatably fitted into both ends of the fulcrum shaft 17, While horizontally supporting the fork 11 at the lowest position of the shaft 17, the fulcrum shaft 1
The fork 11 is configured to rotate toward the rear of the aircraft at the highest position of the left and right masts 6, 6.
The rotation fulcrum shaft 17 of the conventional structure that rotatably supports the fork 11 at the rear of the aircraft body is used as is, and this rotation fulcrum shaft 17 is vertically connected to the left and right masts 6, 6 through guide grooves 41 and rollers 42. Since it is mounted so that it can be raised and lowered, it has an extremely simple structure and has the practical and remarkable effect of allowing the conventional fork rotary support structure to have a vertically raising and lowering function without increasing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially enlarged explanatory view of the main part, Fig. 2 is a side view of the whole,
Figure 3 is a plan view of the same, Figure 4 is an enlarged cross-sectional side view of the same,
FIG. 5 is an explanatory diagram of the support structure of the rotation fulcrum shaft, and FIG. 6 is a partially enlarged side view. 1... Trolley, 6... Mast, 11... Fork, 17... Rotation fulcrum shaft, 41... Guide groove, 4
2... Laura.

Claims (1)

[Scope of utility model registration request] A master that rotatably supports a fork to the rear of the aircraft via a rotating fulcrum shaft on the left and right masts installed on a dolly, and also lifts the fork by rotating it around the fulcrum shaft between the dolly and the fork. In the structure provided with a cylinder, a vertical guide groove is formed in the upper part of the rear side of the mast, and the fulcrum shaft is vertically slidably fitted into the guide groove and supported by the left and right masts so as to be movable up and down. A roller is rotatably fitted to both ends of the fulcrum shaft, and the fork is horizontally supported at the lowest position of the fulcrum shaft, while the fork is rotated toward the rear of the aircraft when the fulcrum shaft is at the highest position. A cargo handling vehicle featuring: