JPS59194998A - Fork for forklift - 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 forklift, which is one type of loading machinery, and particularly relates to the structure of its fork body.

Normally, a forklift has a fork body that extends almost horizontally at the front of the machine, and the cargo is placed on top of the fork body to hold it in a predetermined position.
However, conventional forks had a structure that protruded forward long enough to correspond to the size of the pallet. For this reason, when the space in which the forklift can move is narrow, such as in a warehouse, it is extremely troublesome to operate or turn the forklift, and its workability is significantly deteriorated, and in some cases, the forklift cannot be operated. Another problem is that if the cargo to be transported is, for example, low on the front side or slanted, the fork cannot be inserted into the pallet, making it impossible to use a forklift.

The present invention has been made in order to eliminate the drawbacks of the conventional forklift, and a fork body applied to the forklift has the following structure. In other words, the gist of the present invention is mass) If (on the other hand, in a device in which a load is placed on a fork body that can be raised and lowered freely and extends forward almost horizontally, the fork body has a number of pieces at the tip) The fork is characterized in that its sides are connected in a bendable manner so as to rotate upward, and the fork body is configured to be freely retractable.

The present invention will be specifically described below based on illustrated embodiments. Code 1 is a forklift, and the front of the machine is
The entire mast 2 is installed in a nearly upright position. A fork 3 is attached to the mast 2 so as to be able to rise and fall freely, and the fork 3 is attached to a lift chain 4.
It is driven up and down by. In addition, code 5
is a cylinder for tilting the mast. The entire configuration of this fork 3 will be explained in more detail below. First, the symbol "°" indicates the frame of the fork 3, which is a hollow frame body containing the shape of the mast 29 that stands upright, and this frame. A fork body 11 is provided below the fork body 10. This fork body 11 is composed of a large number of pieces 12, and each piece 12 is configured to be rotatable by a pin pin 13.

Of course, all of the pieces provided at the tip of the pieces 12 have a wedge-like pointed shape in consideration of the color of the fork body 11 on the pallet. Each of these pieces 12 is configured such that its tip can rotate only in an upward direction, and each piece is provided with a stopper portion 12 and a stopper receiver 121). are the stopper portions 12 in the adjacent pieces 12, respectively.
When the stopper receiver 12b of another piece comes into contact with the fork body 11, the fork body 11 is maintained in a horizontally straight extended state. The rotation is transmitted to the hoisting sprocket 14 by a hydraulic motor 15 above it. Incidentally, when the fork body 11 is placed in the retracted state, the piece 12 on the base side is completely raised within the frame 10 and is retracted there. Incidentally, since the forklift 1 is normally provided with two fork bodies 11, two hoisting sprockets 14 are also provided therefor. Of course, the hoisting sprocket 1
4 may be driven by a single hydraulic motor, and the left and right hoisting sprockets 14 may be driven in a connected state as appropriate.

Further, as another embodiment of the 7-hole 3, there is the one shown in FIG. The upper sprocket 14 etc. are eliminated, and the structure is as follows. That is, a pair of guide rollers R' (r) is simply provided below the frame 10, and no special driving device is provided.Instead, the upper roller 16 of the frame 10 is wound around it. In this case, the fork body 11 is retracted or pulled out by fully winding or rewinding the hoisting chain 16. The hoisting chain 16 may be driven by driving the turn sprocket 17 as appropriate; Alternatively, a slider of a cylinder may be connected to the free end side of the hoisting chain 16, thereby pulling the hoisting chain 16 (4
) Or you may try to pull it back. The key is hoisting chain 1
It is only necessary to be able to drive 6, and it is also possible to incorporate other known methods.

Further, in the case of this embodiment, the working end of the hoisting chain 16 of the fork body 11 may be attached to the fork body 11 for lifting and lowering operations. In the case of this embodiment, for example, in case the fork does not move forward sufficiently by letting out the chain, an appropriate weight may be provided on the bridge 12 of the fork body 11 on the most proximal side. good.

The present invention has the above-described configuration, and when a normal forklift is used, the hoisting sprocket 14 or hoisting chain 16 is appropriately driven to move the piece 12 of the fork body 11 forward. It is something that is played nine times.

Thereafter, the fork body 11 is inserted into the pallet P of the cargo A to be transported according to the usual method and the cargo handling operation is performed. On the other hand, if the protrusion of the fork body 11 becomes an obstacle when turning, etc., use the hoisting block.
14'fr: Invert, or wind up the hoisting chain 16, and draw each piece 12 of the fork body 11 into the vertical portion of the frame 10. As a result, the tip of the forklift 1 is pulled into the vehicle body of the forklift 1, and the tip is withdrawn to be in a stored state.

In such a case, it will be possible to turn even in an extremely narrow space, making full use of its excellent workability.

Furthermore, according to the present invention, as shown in FIG. By extending the fork body 11, the fork body 11 can be easily inserted into the bent part of the cargo A at an angle, making it possible to perform this kind of work that was previously impossible.

[Brief explanation of the drawing]

(7) Fig. 1 is a side view of a forklift to which the present invention is applied; Fig. 2 is a longitudinal side view showing an embodiment of the fork of the present invention;
Fig. 3 is a partially exploded plan view showing a part of the fork body in full enlargement, Fig. 4 is a side view showing still another embodiment of the fork, and Fig. 5 is a skeleton showing a special cargo handling work situation of the present invention. FIG. 1; Forklift 2; Mast 3; Fork 10; Frame 11; Fork body 12; Piece 13; Pinji Japan India A; Luggage P; Pallet patent applicant Masatsugu Fukuchi (8)

Claims (1)

[Claims] In a device in which cargo is placed on a fork body that is attached to a mast so that it can be raised and lowered and extends forward horizontally, the fork body has a large number of pieces that rotate upward at the tip. A fork for a forklift, characterized in that the fork is connected in a flexible manner, and the fork body is configured to be freely retractable.