JP2000302395A - Fork fixing device of forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate troubles that a pin drops by the vibration when a forklift runs on a floor in a bad condition in the case when the pin of simple insertion type is used with a conventional fork fixing device or that the pin with a built-in spring is inconvenient in attachment/detachment, and expensive in manufacturing the pin. SOLUTION: One or a plurality of cutout grooves 8 are provided on the outer side of the circumference of a hole 7 for inserting a stopper pin 1 of a support 6, one or a plurality of projections 3 are provided on the axis of the stopper pin 1, the projection 3 of the pin 1 is aligned and inserted in the cutout groove 8 of the hole 7 at the position where a fork 11 is fixed, and the pin 1 is rotated and fixed thereto. A plate of a support 6 is formed by overlapping plates having a concentric round hole in which the stopper pin 1 is rotatable without hitting the projection 3 in a sandwich manner between two plates which have the hole 7 having one cutout groove 8 on the outer side of the circumference is provided as necessary, and are arranged so that the cutout grooves 8 are not agreed in the overlapping condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a forklift fixing device for a forklift.

[0002]

2. Description of the Related Art As shown in FIGS. 5 to 7, the prior art has a structure in which a pin inserted into a hole formed in a support of a fork carriage only suppresses a notch of a fork movable along a shaft. Alternatively, a structure was used in which the knob was pressed against a plate of the backrest to prevent the knob from coming off, while being held down by a pin incorporating a spring.

[0003]

However, in the above-mentioned conventional type using a pin which is simply inserted, the pin may fall off due to vibration during traveling on a place having a bad floor surface, or a pin having a spring incorporated therein. In such a case, there are disadvantages such as inconvenience in attaching / detaching the pins and high cost of manufacturing the pins, and an object of the present invention is to solve these disadvantages.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned problems, and is claimed in claim 1.
According to the invention described above, one or more notch grooves are provided on the outer circumference of the hole for inserting the stopper pin of the support, and the stopper pin is provided with one or more protrusions on the shaft, Align the protrusion of the stopper pin with the notch groove of the hole where the fork is fixed, and insert it.
A fork fixing device characterized by rotating and fixing a stopper pin.

That is, as long as the projection of the stopper pin does not coincide with the cutout groove of the hole for inserting the stopper pin of the support, the stopper pin does not fall out, and the probability of coincidence under normal working conditions is extremely low. .

Further, in the case where two projections are provided, the projections suppress the wobbling of the pins when the stopper pins are assembled. Therefore, the notch grooves in the support holes are provided in the front-rear direction. When the stopper pin is at the retaining position, there is little wobble in the left-right direction, and there is an effect of preventing the fork from moving left and right.

According to a second aspect of the present invention, there is provided a device having a hole provided with a cutout groove at one place on the outer circumference, and having two cutout grooves arranged so that the cutout grooves do not coincide with each other in an overlapped state. 2. A fork fixing device according to claim 1, wherein a plate having a concentric round hole through which a stopper pin can be rotated without hitting a projection is laminated in a sandwich shape to form a support plate.

With this configuration, it is difficult for the stopper pin to pass through the notch groove while rotating due to vibration, and it is possible to reliably prevent the stopper pin from coming off.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a first embodiment of a fork fixing device, and FIG. 2 is a sectional view at the time of assembly. A pin is inserted on the axis of the stopper pin 1 and one or more projections 3 are provided. On the other hand support 6
The plate has a hole 7 for inserting the stopper pin 1, and one or a plurality of notched grooves 8 are provided on the outer circumference thereof. Move to the hole 7 where the fork 11 is fixed, hold the knob 13 of the stopper pin 1 and
The stopper pin 1 is prevented from coming off by inserting and rotating in accordance with the notch groove 8 and shifting the position of the notch groove 8 and the projection 3.

When the stopper pin 1 is rotated with respect to the notch groove 8 of the hole 7 provided in the plate of the support 6, the projection 3 is displaced.
The probability that the projection 3 and the projection 3 match is very low, and the projection 3 does not come off in normal work.

In order to make it easier to pull out the stopper pin, a mating mark 12 serving as a mark is provided above the projection 3 of the stopper pin 1. 8 can be easily pulled out by combining them.

FIG. 3 shows a second embodiment of the fixing device in which the function of preventing the stopper pin 1 provided on the plate of the support 6 from coming off is emphasized. The protrusion 3 of the stopper pin 1 has two notched grooves 8. Since it passes through and is inserted, the stopper is strictly acting.

FIG. 4 shows a plurality of protrusions 3 on the stopper pin 1.
In the third embodiment, a hole formed on the shaft is formed as a through hole, and two protrusions 3 are formed and provided using a pin longer than the diameter of the stopper pin 1. The notch groove 8 of the insertion hole 7 of the plate of the support 6 is also formed with a plurality of notch grooves 8 corresponding to it. As a pin constituting the projection 3 provided on the stopper pin 1, a simple commercially available one such as a snap pin may be used.

When this configuration is used, when the stopper pin 1 is assembled, the protrusions 3 suppress wobbling of the pins. Therefore, if the notch groove 8 of the insertion hole 7 of the plate of the support 6 is provided in the front-rear direction, if the stopper pin 1 is rotated by 90 degrees and fixed at a position where it is fixed, the wobble in the left-right direction is reduced, and the fork 11 is moved. The effect of preventing movement to the left and right is great.

When the fixed position of the fork 11 is moved,
No matter which hole 7 the stopper pin 1 is temporarily inserted into, the fork 11
It does not hinder the movement of the stopper pin 1, so that the place where the stopper pin 1 is placed is not troublesome. Further, the position where the fork 11 is desired to be moved is determined in advance, and the fork 11 is temporarily placed in the hole 7.
Can be used as a marker when moving.

Conventionally, the stopper pin 1 which has been removed must be inserted into the hole 7 outside the range in which the fork 11 can be moved, or placed sideways in another place. It was troublesome to replace 1 twice, and in some cases, the pin placed horizontally rolled under the vehicle, affecting the workability. The present invention is also useful for preventing such a problem from occurring.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a fixing device according to the present invention.

FIG. 2 is a sectional view of the fixing device of FIG. 1;

FIG. 3 is an exploded view illustrating a hole of a second embodiment of the fixing device.

FIG. 4 is a view showing a stopper pin of a third embodiment of the fixing device.

FIG. 5 is a conventional fixing device using pins.

FIG. 6 shows a conventional fixing device using a retaining pin.

FIG. 7 is an exploded perspective view showing a structure of a fork carriage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stopper pin 3 Projection 6 Support 7 Hole 8 Notch groove 9 Round hole 11 Fork

Claims (2)

[Claims] At least one notch groove (8) is provided on the outer periphery of a stopper pin (1) insertion hole (7) of a support (6), and the stopper pin (1) is a shaft. One or more projections (3) shall be provided on the fork (1
Align the protrusion (3) of the stopper pin (1) with the notch groove (8) of the hole (7) at the position where
A fork fixing device characterized by rotating and fixing (1). 2. It has a hole (7) provided with a notch groove (8) at one place on the outer circumference, and the notch grooves (8) are mutually overlapped.
The protrusion (3) between the two plates arranged so that they do not match
Concentric round hole that can rotate the stopper pin (1) without hitting
(9) Lay the plate in a sandwich to support (6)
2. The fork fixing device according to claim 1, wherein said plate is constituted by the following.