JPS5889467A - Handcart - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hand-pushed transport vehicle equipped with a mounting plate that can be raised and lowered.

As such a hand-held transport vehicle, a frame equipped with front and rear wheels, a mounting plate that can be raised and lowered and placed on a 71 norm, and two wheels 11 intersecting at the middle part are used. It is equipped with a pair of left and right elevating links which are pivotally mounted and support a mounting plate on the frame so as to be able to move up and down, and by expanding and contracting these elevating links to move the mounting plate M and R, it is possible to move the transported object. Devices that allow for easy loading and unloading of goods are known. However, with conventional models, the R lowering operation of the mounting plate is unstable, and the mechanism to stabilize it is complicated.
There were some problems such as

It is an object of the present invention to solve the above-mentioned problems and provide a hand-operated transport system in which the lifting and lowering operations of the mounting plate can be performed stably and the structure of the R lowering mechanism is relatively simple.

In order to achieve this object, the present invention, in the above-mentioned hand-held transport vehicle, has the entire lower end of the arm of the elevating link restrained in the vertical direction and engaged with the frame so as to be able to reciprocate in the longitudinal direction. The entire upper end of the arm is restrained in the vertical direction on the mounting plate, and is engaged so as to be freely movable back and forth in the front and rear directions. One end of the elevating and lowering operation member raised and lowered by a ram is pivotally connected to a part of the arm of the elevating link, and the mounting plate vertically moves up and down while maintaining the same position in the front and back direction.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In Fig. 1r, reference numeral 1 is a frame, and this 71-norm 1 has front and rear wheels 2.3 on the left and HQ l on the lower right side.
The lower end of an inverted ( )-shaped pusher 4 extending downward is fixed to the rear end of the frame 1. A mounting plate 5 is disposed on the frame 1, and this The plate 5G is supported by the 71 norm 1 by a lifting link f) 6, which will be described later.

The outer arm 7.8 is centered on the shaft 9 at the midpoint of these lengths.
The arm 7.8 is pivoted with
] - The levers 10 and 11 are rotatably mounted (t Gj), and the lowering links 6 are arranged on the left and right sides of the frame 1 and the mounting plate 5, respectively.

Arm 1.8 of lifting link 6! ; [1-ra 11 at the end
All of these are formed in frame 1.

The rollers 10 at the L end of the arm 7.8 are engaged with the right rail 12, and all of them are engaged with the left and right rails 13 formed on the mounting plate 5, and the rollers 10.11 ( , L
The whole body is restrained in the vertical direction by the rails 13 and 12, and is freely reciprocated in the front and rear directions. Also, a bracket 30 protruding from approximately the center of the lower surface of the placing plate 5 and a pivot 31 suspended horizontally on the upper part of the arm 7 are connected via an arm 32 parallel to the arm 8, and the placing plate 5 is connected to the folding link 6. It regulates the position in the front and back direction. Hydraulic jack 14 on frame 1
A ram 15, which is fixed and vertically raised and lowered by the linear reciprocation of the hydraulic jack 14, is arranged at the center of the frame 1h1 directly below the center of the mounting plate 5. A vertical groove type connecting member 16 is fixed to the upper end of the ram 15, and a support plate 17 is installed at both left and right ends of the connecting member 16 so as to protrude downward. An intermediate portion of the operating member 19 is pivotally mounted. The shaft 18 is the ram 1
The support plate 17 is disposed below one and one and two ends of the hydraulic jack 14, and is configured to overlap with the outer side of the cylinder 20 of the hydraulic jack 14. 71 No. 1 of the lifting operation member 19
One end portion extending toward the front side of 91 is pivotally connected to the left and right foot frames 1 of the lift link 6 by the horizontal shaft 21, and the lift operation member 19
Counter rollers 23 are attached to both left and right ends of a roller shaft 22 whose other end extends toward the rear side of the frame 1 of the IJ frame 9Q1°.
These rollers 23 are installed in the frame 1 4-f? , :
is engaged with the rail 24 and restrained in the vertical direction, and
/i In the rear direction: 1) It is tongued so that it can move backwards. The horizontal frame shaft 21 is disposed below and in front of the pivot shaft 9 of the lifting link 6, and is attached to the roller shaft 22. C is placed in the novel. A jack pedal 25 and a release lever 26 are attached to the rear end of the fly 111, and each of these is provided with a return spring (not shown).

By repeating the depression and release of the jack pedal 25, the ram 15 of the hydraulic jack 14 is extended in one direction due to back pressure via the interlocking mechanism 27.
By manually operating the release lever 26, the ram 1
5 becomes J:・), which is shortened due to the release of back pressure.

During manual transportation of this embodiment, which is configured like a 1-strip, if the mounting plate 5 is at the lower end as indicated by the chain line in FIG. almost in contact with the lift link 6
is shortened, and the A lowering operation member 19 is made almost horizontal (
4), and the ram 15 of the hydraulic jack 14 has also been shortened. In this state 1. When the jack pedal 25 is operated as described above to extend the ram 15 of the hydraulic jack 14 vertically downward (l), the connecting member 16 and the support plate 17 are
stands vertically upwards.

For this reason, the elevating and lowering operation member 19 rotates and stands up while its roller 21 moves horizontally along the rail 24 while being moved through the shaft 18. As a result of the operation of the lift operation member 19, the lift link 6 is extended via the horizontal frame shaft 21, and the mounting plate 5 remains in a horizontal state and moves vertically in the front-rear direction V while maintaining the same position -L, as shown in FIG. -L arm shown in solid line.

Stand upright to the edge. Therefore, the loading plate 5 can be placed at a desired height and the article to be transported can be unloaded.

In addition, when the mounting plate 5 is in the -F raised state, operate the release lever 6-2 [1) to release the hydraulic pressure. When the hydraulic pressure acting on the ram 15 of the lever 14 is released, the load on the mounting plate 5, etc.
: Tsul￥? As the cape link 6 shortens, the lifting operation member 19 rotates in the direction of collapse, the ram 15 shortens, and the mounting plate 5
The line follows the line m in Figure 1, and goes all the way to the lower end. Then, by placing the loading plate 5 on which the transported article is placed in the 'F yielding state and avoiding running during manual transport, stability 1. You can drive with ease.

In addition, the reference numeral 28 in the figure is a support leg that is attached to the frame 1, and this support leg 28 is attached to the frame 1 at t when loading and unloading the transported articles.
it 1 concubine sleeve 1! , release the ground and drive while being carried by hand! This is a conventionally known method.

As explained above, the hand-held transport vehicle of the present invention can be used in a straight line
Oil 11 jar with 1 double-acting ram 15...I (:14
Attach it to 171 Nome 1, and ^a Crumb 1! The mounting plate 5 is made to stand up and down via the elevating operation member 19 and the pair of left and right 4 o'clock links 6 by extending the arm 14, and an arm pivotably connected to intersect with η of the elevating link 6. All of the lower ends of arms 7 and 8 are fixed to July 21-mu 1, and all of one end of arm 7.8 is fixed to mounting plate 5, respectively, in the direction of Ilζ1, and they are movable back and forth in the front and rear directions. By engaging them, the mounting plate 5 maintains the same position in the front-rear direction and moves vertically q 10Wl, so that the pivot of the arm 7.8 of the lifting link 6 is fixed regardless of the position of the mounting plate 5 in the earthwork direction. By not changing the position of the mounting part in the front and back direction, the balance of the weight in the front and back direction is maintained, and the lifting and lowering operations of the mounting plate 5 can be performed stably. It has the advantage that the structure for raising and lowering it while maintaining it is relatively simple.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, FIG.
The figure is an enlarged cross-sectional view showing the connecting portion between the hydraulic jack and the four-down operation member. 1...Frame, 2.3...Front and rear wheels, 5...
Placement plate, 6... Lifting link, 7, 8... Arm, 1
4... Hydraulic jack, 15... Ram, 19... Lifting operation member. Figure 3

Claims (1)

[Claims] A frame with front and rear wheels attached, a mounting plate that can be raised and lowered on the frame, and two? - a pair of left and right elevating links, in which the frame is pivoted so as to avoid crossing each other at the middle part, and a mounting plate is supported on the frame so as to be movable up and down; The entire lower end of the arm is engaged with the frame so that it can be vertically restrained and can freely reciprocate in the front-back direction, and the entire upper end of the arm can be restrained in the vertical direction with a mounting plate and can freely reciprocate in the front-back direction. A hydraulic jack equipped with a ram that engages with the ram and moves back and forth in a straight line is attached to the frame, and one end of the elevating operation member that is raised and lowered by the ram is pivotally connected to a part of the arm of the elevating link, and the mounting plate is A hand-held transport vehicle characterized by being connected to a lifting link so that it can move up and down.