JP2005289631A - Simple moving mechanism of fork mover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple moving mechanism of a fork mover for a fork lift with a simple constitution capable of increasing a range of visual field at a front side of an operator, safely performing works of transportation, loading or unloading of a baggage and reducing cost and assembling manhours by reducing the number of parts. <P>SOLUTION: In the simple moving mechanism of the fork mover, a pair of left and right forks is slidably provided on a vertically movably mounted fork carriage. A piston rod of a hydraulic cylinder for the mover is attached to one fork and a rear end of the hydraulic cylinder for the mover is attached to a side plate of the fork carriage. The other fork can be retained to upper and lower connection plates of the fork carriage in the appropriate fixing state. Further, the pair of left and right forks is connected by a removable connection plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a simple moving mechanism for a fork mover that can freely adjust a fork interval of a forklift truck.

Generally, in a cargo handling vehicle such as a forklift, it is often necessary to appropriately adjust the fork interval in accordance with the form of the object to be handled, and this adjustment of the fork interval is performed using a pair of mover hydraulic cylinders in the finger bar. I was using it.
5 and 6 show an example of a conventional fork mover, and there are a separate type that can move the left and right forks a and b separately and a double-action type that can move the left and right forks simultaneously. In the double-acting type, the fork moving cylinder c has a structure in which a total of two cylinders are attached to each of the left and right for moving the left and right forks simultaneously with one operating lever.

Also, as shown in FIG. 6, in the double-acting type, one cylinder h is connected to one fork f, and a chain n is attached to the side j 'of the other fork f'. n is one and is connected to the side j of the fork f on one side, and the other side k ′ of the fork f ′ is connected to the other side k of the fork f on one side. In some structures, the chains n and n ′ serve as a linkage for moving both forks f and f ′ simultaneously.
Japanese Utility Model Publication No. 61-78196 Japanese Utility Model Publication No. 4-65295

However, the above-described conventional fork mover device can reduce the cost, but has the following problems.
That is, when the operator sitting in the driver's seat handles the load, the operator visually observes the fork in front through the gaps between the mast, the board part, and the hydraulic piping parts to carry, load, or unload the load. Doing work.

However, in the conventional double-acting fork mover device, the opening area between the boards is reduced due to two hydraulic cylinders, the accompanying hydraulic piping, the increase in the number of parts, etc., and the structure of one hydraulic cylinder is used. Even if there is a chain, the number of parts, such as chain sprockets, increases, so the visibility range in front of the operator is small and it is difficult to check the tip of the fork, so it is difficult to check the tip of the fork. There are also problems in terms of safety.
Furthermore, there is a problem that the cost increases due to an increase in the number of parts, and the assembly man-hour increases.

  The present invention has been made paying attention to the above-mentioned problems, and has a simple configuration that increases the range of visibility in front of the operator, and can safely carry, load, or unload cargo. An object of the present invention is to provide a simple moving mechanism of a fork mover for a forklift that can reduce the cost and assembly man-hours by reducing the number of parts.

  In order to achieve the above object, the first invention of the present application is to slidably move a pair of left and right forks on a fork carriage mounted on a mast disposed in front of a vehicle body of a forklift truck so as to be movable up and down via a board. One fork is provided with a piston rod of a mover hydraulic cylinder, a rear end portion of the mover hydraulic cylinder is attached to a side plate of the fork carriage, and the other fork is located above and below the fork carriage. The fork mover has a simple moving mechanism in which the pair of left and right forks are connected to each other by a connecting plate that can be removed.

  In order to achieve the above object, the second invention of the present application is such that the upper and lower connecting plates of the fork carriage have a long shape including a flat portion and a flange portion protruding from the flat portion. A fork mover in which a recess is formed, and a vertical bracket of the pair of forks is provided with a hook-shaped bracket, the hook-shaped bracket is fitted to the flange portion, and the pair of forks are slidable in the horizontal direction. It is characterized by the simple movement mechanism.

  According to the above configuration, by using a flat plate having pins at both ends, the adjustment of the interval between the forks by the fork mover mechanism can be performed with one hydraulic cylinder, and the hydraulic pressure associated with using one hydraulic cylinder The visibility range ahead of the operator is increased by increasing the opening area between the boards due to a decrease in piping, the number of parts, etc., and the work of transporting, loading, or unloading luggage can be performed safely. The cost can be reduced by reducing the number of points, and assembly man-hours can be reduced.

FIG. 1 (a) is a front view of a fork mover mounted on a mast of a forklift truck (not shown), and (b) is a view as seen from the Z direction of FIG. FIG. 2A is a front view of a flat plate, and FIG. 2B is a plan view. FIG. 3 is a front view of a fork mover in which the position of one fork is moved, and FIG. 3B is a detailed view seen from the X direction of FIG. FIG. 4 is a front view of the fork mover in which the position of the other fork is moved.

Hereinafter, the best mode of a simple moving mechanism of a fork mover according to the present invention will be described with reference to the drawings.
In FIG. 1A, reference numeral 1 denotes a fork carriage which is mounted on a mast disposed in front of a forklift truck (not shown) through a board 2 so as to be movable up and down. Is detachably attached.
The fork carriage 1 includes left and right side plates 5 and 6 and upper and lower connecting plates 7 and 8 that connect the side plates 5 and 6 and is formed in a square shape.

As shown in FIG. 1 (b), the connecting plates 7 and 8 have a long cross-sectional shape composed of flat portions 9 and 9 and flange portions 10 and 10 protruding from the flat portions 8 and 8. The flat portions 9 and 9 are formed with concave portions 11 and 11 such as racks.
The vertical portions of the forks 3 and 4 are provided with hook-shaped brackets 12 and 12, which are fitted to the flange portions 10 and 10, and the forks 3 and 4 slide in the horizontal direction. It is free.

One of the forks 3, 4 that can slide in the horizontal direction can be appropriately fixed to the upper and lower connecting plates 7, 8.
That is, a female screw is formed on the hook-shaped bracket 12 of the fork 4, and a bolt 13 is screwed to the female screw so as to be movable up and down.
When the fork 4 is fixed at an appropriate position on the upper and lower connecting plates 7, 8, the bolt 13 is moved downward so as to enter the recess 11. As described above, the fork 4 is fixed to the upper connecting plate 7 with the bolts 13 provided on the bracket 12. However, the bolts 13 may be replaced with pins that can move up and down, such as springs.

A mounting bracket 14 projects from the right side plate 6 of the fork carriage 1, and the bottom side of one mover hydraulic cylinder 15 is pivotally attached to the mounting bracket 14 by a mounting pin 16.
A rod head 18 is provided on the piston rod 17 of the mover hydraulic cylinder 15, and this rod head 18 is detachably coupled to a mounting bracket 19 of the fork 3 by a mounting pin 20.
The fork 3 in the position state of FIG. 1A can be moved in the left-right direction by the expansion and contraction of the mover hydraulic cylinder 15.

In addition, mounting brackets 22 having holes 21 are provided on the back surfaces of the forks in the vertical portions of the left and right forks 3 and 4, respectively.
FIG. 2 shows a fixing plate 23 for holding the left fork 3 and the right fork 4 in a fixed state.
Engagement pins 24, 24 project from the lower surface near the left and right ends of the fixing plate 23. The engagement pins 24, 24 enter the holes 21 of the mounting bracket 22, and the fork 3 and the fork 4 are held in a fixed state. Is done.

Next, a procedure for adjusting the distance between the fork 3 and the fork 4 according to the size of the load will be described.
As shown in FIG. 1 (a), the fixing plate 23 is removed from the fork 3 and the fork 4. From this state, when the piston rod 17 of the mover hydraulic cylinder 15 is moved to the right, one fork 3 is moved to the right. Move to.
When the fork 3 comes to an appropriate position by the piston rod 17, the fixed plate 23 that has been removed is brought between the fork 3 and the fork 4, and the engaging pins 24, 24 of the fixed plate 23 are attached to the fork 3 and the fork 4. It fits in the holes 21 and 21 of the brackets 22 and 22, and it is in the state of Fig.2 (a).

When the piston rod 17 of the mover hydraulic cylinder 15 is again moved to the left from this state, the fork 4 that can slide by moving the bolt upward moves to the left together with the fork 3.
When the fork 4 comes to an appropriate position, the fork 4 is fixed by the bolt 13 and the fixing plate 23 is removed from the fork 3 and the fork 4.
When the piston rod 17 is moved to the right again, the fork 3 also moves to the right, and the interval is adjusted to an appropriate position.

(a) is a front view of a fork mover according to the present invention mounted on a mast of a forklift truck (not shown), and (b) is an arrow view as viewed from the Z direction in FIG. (a) is a front view of the flat plate used for the fork mover which concerns on this invention, (b) is a top view. (a) is the front view of the fork mover which moved the position of one fork in the fork mover which concerns on this invention, (b) is the detailed figure seen from the arrow X of FIG. (a) is the front view of the fork mover which moved the position of the other fork in the fork mover concerning the present invention. It is a front view of the fork mover which has two cylinders of the conventional double action type. It is the front view of the fork mover which moves both forks simultaneously using the chain with one cylinder with the conventional double action type.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fork carriage 2 ... Board 3 ... Left fork 4 ... Right fork 5 ... Left side plate 6 ... Right side plate 7 ... Upper connection plate 8 ... Lower connection plate 9 ... Flat part
10 ... Flange
11 ... Recess
12 ... Saddle bracket
13 ... Lock pin
14 ... Mounting bracket
15 ... Hydraulic cylinder for mover
16 ... Mounting pin
17 ... Piston rod
18 ... Rod head
19 ... Mounting bracket
20 ... Mounting pin
21 ... hole
22 ... Mounting bracket
23 ... Fixed plate
24 ... engaging pin

Claims (2)

  A pair of left and right forks is slidably mounted on a fork carriage mounted on a mast disposed in front of the body of the forklift truck through a board, and a piton rod of a hydraulic cylinder for a mover is attached to one fork, The rear end of the hydraulic cylinder for the mover is attached to a side plate of the fork carriage, and the other fork can be appropriately fixed to the upper and lower connecting plates on the fork carriage. Simple moving mechanism of fork movers connected by connecting plates that can be removed between forks.   The upper and lower connecting plates of the fork carriage have a long shape including a flat portion and a flange portion protruding from the flat portion, and a concave portion is formed in the flat portion, and a vertical portion of the pair of forks 2. A simple moving mechanism of a fork mover according to claim 1, wherein a bracket is provided, and the hooked bracket is fitted to the flange portion so that the pair of forks are slidable in the horizontal direction.

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