JPS6140619Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pallet handling loader which is simple in structure and portable, and which is capable of easily transporting pallets loaded with cargo.

Conventionally, cargo handling machines such as forklift trucks and pallet transport vehicles have been frequently used to transport and unload loaded pallets, but all of these cargo handling machines are equipped with a driving motor and are in the form of self-propelled vehicles. Due to its heavy structure, it is impossible to move or carry it manually, and there are restrictions on where it can be used, such as on the loading platform of a freight vehicle or in a narrow warehouse. That was difficult.

In view of the above points, the present invention has a simple structure and is lightweight so that workers can easily lift and carry it, and it can stably move straight or turn even on the loading platform of a cargo vehicle or in a narrow warehouse. The purpose of the present invention is to provide a cargo handling loader for pallets.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 mainly show a first embodiment for a double-sided pallet _P1 , in which the loader main body 1 is connected to the operating frame 2.
and a pair of hawk-claw-shaped cargo receiving frames 3 extending parallel to each other at the front end of the operating frame 2. The front end of each cargo receiving frame 3 is formed into a U-shaped cross section with an open lower surface, and the remaining portion is formed into a substantially inverted triangular cross section with the width of the upper surface narrower than that of the front end. In the inverted triangular part of each receiving frame 3,
Inside thereof, a pair of reinforcing members 51 are provided along the longitudinal direction of the cargo receiving frame 3 to connect the bottom portion 3a and each inclined portion 3b. This reduces the weight of the receiving frame 3 and strengthens it against bending. The upper surface of each cargo receiving frame 3 functions as a cargo receiving surface 4, and the boundary between it and the operation frame 2 is connected to the cargo receiving surface 4 at an obtuse angle. An inclined pallet abutment surface 5 is formed. The cargo receiving frame 3 is formed in a size that allows it to be inserted into a gap C formed in the double-sided pallet _P1 .

A hydraulic actuation source H _S is provided at the middle portion of the upper surface of the operation frame 2 . The hydraulic actuation source H _S is an actuation pedal 7 whose front end is pivotally mounted 50 to the bracket 6 of the operation frame 2.
, a cylinder 8 erected on the upper surface of the operating frame 2 below the operating pedal 7, a ram 9 slidably engaged with the cylinder 8, and the ram 9 is always urged upward, so that its upper end is connected to the operating pedal. a spring 11 brought into contact with the horizontal rod 10 of 7;
and an oil tank 1 connected to the suction port of the cylinder 8 via an oil passage 13 having a check valve 12 (FIG. 4).
4 and more. The operating pedal 7 is formed into a substantially U-shape in plan, and its connecting portion 7a extends rearward from the operating frame 2 and is used as a footrest and as a handle for carrying.

Further, the operating frame 2 is provided with a hydraulically operated first operating mechanism _H1 that raises and lowers it. The first actuating mechanism _H1 passes through the operating frame 2 and the oil tank 14 in the vertical direction, and forms a predetermined gap S between a cylinder 15 fixed thereto and a large diameter hole in the upper part of the cylinder 15. The ram 16 is inserted into the ram 16 and has its lower end projected outside the cylinder 15 by sliding into the small diameter hole at the bottom thereof, and the gap S in the large diameter hole at the top of the cylinder 15 is a check valve formed in the operation frame 2. 17
It is connected to the discharge port of the cylinder 8 of the hydraulic operating source H _{S via an oil passage 18 having a hydraulic pressure source H S} (FIG. 4).

At the lower end of the ram 16, a center boss portion 20a of a conical mounting base 20 to which a plurality of (three in the illustrated example) caster type rear running wheels 19 are attached is connected to a pair of bearings 21.
₁ , 21 and ₂ so as to be rotatable in a horizontal plane. As shown in FIGS. 7 to 9, the support bracket 40 of each rear running wheel 19 has a disk portion 40a.
and an inclined bifurcated portion 40b welded to the lower surface thereof, and the rear running wheel 19 is rotatably attached via a pair of bearings 42 to an axle 41 installed at the lower end of the bifurcated portion 40b. Each support bracket 40
The disc part 40a is attached to the mounting base 20 by pivots 43 located at each vertex of an equilateral triangle on the mounting base 20, and the disc part 40a is attached to the lower surface of the mounting base 20.
A plurality of steel balls 44 are held between the upper surface and the rear running wheels 19, thereby allowing each rear running wheel 19 to rotate within a horizontal plane. The mounting base 20 has one rear running wheel 19 at the front and a pair of rear running wheels 19 at the front.
is attached to the lower end of the ram 16 so that it is located at the rear. A handle support cylinder 22 is erected by welding or the like on the upper surface of the rearwardly projecting portion 20b of the mounting base 20.

On the rear outer surface of the oil tank 14, a plurality of notch grooves 23 for positioning in the forward direction are formed at equal intervals approximately on a semicircumference in a horizontal plane. Operation handle 24
consists of an upper rod portion 24a and a lower rod portion 24b rotatably coupled to the upper rod portion 24a by a pin 25, and is configured to be bendable around the pin 25. Lower stem part 2
4b is fitted into the handle support cylinder 22 in a freely insertable and removable manner, and is non-rotatably fitted into the handle support cylinder 22 by square fitting or the like at its lower end. When engaged with the notch groove 23, it is possible to decide whether to move straight or turn to the left or right, and whether the turning angle is fast or slow.

At the front end of each cargo receiving frame 3, a bifurcated front running wheel support arm 26 is supported by a support shaft 27 so as to be able to rise and fall. An axle 29 is installed. On the other hand, within each cargo receiving frame 3, a second hydraulically operated manual actuation mechanism _H2 is connected to the support arm 26.

Each of the second actuation mechanisms H ₂ is formed integrally with a cylinder 31 fixed within the receiving frame 3 , a piston 32 slidably fitted within the cylinder 31 , and has a front end protruding from the cylinder 31 . a piston rod 34 pivotally connected 33 to the support arm 26;
It becomes more. Cylinder 31 of each second actuation mechanism H ₂
The input side of is the check valve 1 of the oil passage 18 that connects the hydraulic actuation source H _S and the first actuation mechanism H ₁ via the oil passage 35.
7 is connected to the downstream side. 30 is a roller attached to the support shaft 27.

The loader body 1 is mounted on the side of the bracket 6 of the operation frame 2.
An operating pedal 36 is pivotally supported for lowering the
Normally closed valve 37 opened by its operating pedal 36
(FIG. 4) are connected to the oil passage 18 which is connected to the oil tank 14 and the first and second actuation mechanisms H ₁ and H ₂ via oil passages 38 and 39, respectively.

Next, the operation of this embodiment will be explained.
In order to transport, that is, lift and transfer the double-sided pallet _P1 loaded with cargo L, it is inserted into the gap C of the double-sided pallet _P1 in each receiving frame 3 of the cargo handling loader as shown in Figures 1 and 2. Then, the front running wheel 28 is placed in the gap C.
make it stick out. Next, when the actuation pedal 7 of the hydraulic actuation source H _S is repeatedly depressed, the hydraulic pressure is transmitted to the first actuation mechanism H ₁ and both the second actuation mechanisms H ₂ via the oil passages 18 and 35. In this case, the first actuation mechanism H ₁
The inner diameter of the cylinder 15 and the outer diameter of the ram 16, the pressure receiving area of the piston 32 of the second actuating mechanism _H2 , and the distance between the support shaft 27 of the front travel support arm 26 and the axle 29 and pivot joints 33 on both sides thereof. etc., so that the operating frame 2 does not rise until the front end upper surface of each cargo receiving frame 3 comes into contact with _the double-sided pallet _P1 . By rotating counterclockwise, each cargo receiving frame 3 and operating frame 2 tilt upward and forward about the mounting base 20 of the rear running wheel 19.

The upper surface of the front end of each cargo receiving frame 3 is a double-sided pallet _P1.
When it comes into contact with the operation frame 2, the first operating mechanism _H1
also starts to rise, and finally the first actuating mechanism H ₁
The support arm 26 stands up at each stroke end of the cylinder 15 of the cylinder 15 and the piston 32 of the second actuation mechanism _H2 , and the cylinder 15 of the first actuation mechanism _H1 rises to hold the cargo receiving frame 3 and the operation frame 2 horizontally. The double-sided pallet P ₁ is attached to the front and rear running wheels 28, 19.
It can be supported and transported by

When the double-sided pallet P ₁ is transferred, when moving straight forward, the operating handle 24 is engaged with the notch groove 23 in the center and the operating handle 24 is pushed forward. In this case, the caster effect of each rear running wheel 19 provides straight-line performance, and the double-sided pallet _P1 is smoothly transported.

For example, when moving forward by gently turning to the right, bend the operating handle 24 backwards,
After rotating it slightly counterclockwise, stand it up again, and as shown in FIG.
engage. Next, when the operating handle 24 is pressed, the cargo handling loader turns gently to the right due to the caster effect of each rear running wheel 19. When each operating handle 24 is engaged with the rightmost notch 23, each cargo handling loader makes a sharp turn to the right. Perform the same operation when turning left. When the cargo handling loader is moved backward, the operating handle 24 is bent, so that the towing operation is easily performed.

When the double-sided pallet P ₁ is grounded, the normally closed valve 37 is opened by the operation pedal 36, and the oil in the first and second actuating mechanisms H ₁ and H ₂ flows through the oil passages 18, 35, 39, the normally closed valve 37, and the oil. Since the flow returns to the oil tank 14 through the passage 38, the support arm 26 is lowered, and the cylinder 15 of the first actuating mechanism _H1 is lowered, and both frames 2 and 3 are lowered.
returns to its original lowered position.

FIG. 6 shows a second embodiment for a single-sided pallet _P2 , whose construction is basically the same as that of the first embodiment, so the same parts are given the same reference numerals. However, the front running wheel 28 does not protrude beyond the front edge of the receiving frame 3, and the support arm 26 rises and falls within the lower surface gap _S1 of the single-sided pallet _P2 .

In the first and second embodiments, when the cargo handling loader is carried around, it is only necessary to lift it by using the connecting portion 7a of the operating pedal 7 as a handle and tow it while rolling the front running wheels 28, so that the work can be easily carried out. be exposed. Note that the cargo receiving frame 3 may be formed to have an inverted triangular cross section over its entire length.

As described above, according to the present invention, the loader main body 1 is connected to the operating frame 2 and the pair of receiving frames 3 which extend parallel to each other at the front end of the operating frame 2 and are inserted into the pallets P ₁ and P ₂ . Each cargo receiving frame 3 is formed to have a substantially inverted triangular cross section over substantially its entire length, and the operating frame 2 is provided with a human-powered first operating mechanism _H1 for raising and lowering the cargo receiving frame 3.
and a mounting base ₂ on which a plurality of caster type rear running wheels 19 are attached to the first operating mechanism H1.
0, the operating handle 24 of the mounting base 20 is provided upright, and a human-powered second operating mechanism H ₂ for raising and lowering the cargo receiving frame 3 is provided at the front end of each cargo receiving frame ₃ . Since the support arm 26 of the front running wheel 28 is connected to the cargo receiving frame 3 so that it can be raised and lowered, there is no need for a driving motor unlike in the past, the structure is simple, there are few failures, it is extremely lightweight, and it is easy to drive. A robust cargo handling loader can be obtained, which makes it possible to carry cargo easily and efficiently even in a narrow warehouse or on the platform of a freight vehicle, and is also easy to carry. Furthermore, the caster effect of the plurality of rear running wheels 19 makes it possible to stably move straight or turn. Furthermore, each cargo receiving frame 3 has an inverted triangular cross-sectional shape to reduce its weight, and at the same time, its bottom outer surface can be used as a cargo receiving surface, so that a relatively large area can be obtained and cargo can be transported stably. Furthermore, since the inverted triangular receiving frame 3 has a relatively large section modulus, it is strong against bending and has sufficient durability.

[Brief explanation of the drawing]

Figures 1 to 5 show a first embodiment of the present invention for double-sided pallets; Figure 1 is an overall side view, Figure 2 is an overall plan view, and Figure 2A is a second embodiment.
Figure 3 is a cross-sectional view taken along the line _A - _A , Figure 3 is a cross-sectional view taken along the line shown in Figure 2, Figure 4 is a hydraulic circuit diagram, Figure 5 is a partial plan view when a double-sided pallet is transferred, Figure 6 is a cross-sectional view of the present invention for single-sided pallets. An overall side view of the second embodiment carried out in the seventh embodiment.
9 to 9 show the rear running wheels, FIG. 7 is a vertical sectional side view of the main part, FIG. 8 is a rear view, and FIG. 9 is a bottom view. P ₁ , P ₂ ... Double-sided and single-sided pallets as pallets, H ₁ , H ₂ ... First and second operating mechanisms, 1...
...Loader body, 2...Operation frame, 3...Receiving frame, 1
9... Rear running wheel, 20... Mounting base, 24...
Operation handle, 26...support arm, 28...front running wheel.

Claims (1)

[Scope of utility model registration request] The loader main body 1 is composed of an operation frame 2 and a pair of cargo receiving frames 3 extending parallel to each other at the front end of the operating frame 2 and inserted into pallets P ₁ and P ₂ . The operating frame 2 has a substantially inverted triangular cross section over substantially its entire length, and is provided with a human-powered first actuator H ₁ for raising and lowering the operating frame ₂ .
A mounting base 20 to which a plurality of caster-type rear running wheels 19 are attached is provided, an operating handle 24 is provided upright on the mounting base 20, and a human-powered motor for raising and lowering the cargo receiving frame 3 is provided at the front end of each cargo receiving frame 3. A cargo handling loader for pallets which is provided with two actuating machines _H2 and in which a supporting arm 26 _of a front running wheel 28, which is rotatably supported on each cargo receiving frame 3, is connected to each second actuating machine H2.