JP2914878B2 - Forklift fork mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift mounting structure for a forklift in which the position and interval of a fork can be adjusted by, for example, sliding a fork against a finger bar.

[0002]

2. Description of the Related Art When a fork is attached to a finger bar, noise is generated due to rattling caused by a gap formed between the finger bar and a resonance sound is generated by vibration of an engine. Conventionally, in order to eliminate such rattling, a screw hole is formed in the lower locking piece (lower claw) of the fork, and a bolt screwed into the screw hole is directly acted on the lower locking piece to remove the finger bar. It is fixed to. However, in this bolt type, it is troublesome to frequently perform the bolt operation from the rear of the fork, and therefore, various mounting structures that basically reduce the bolt operation are provided.

That is, as a structure of this type, forklift truck fork devices disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 52-77170 are provided. This conventional configuration,
A long groove is provided in the lower part of the front surface of the finger bar, and a flexible massive elastic body held by a holder is fitted in the groove. To the rear surface of the holder, tips of an appropriate number of bolts screwed to the finger bar are rotatably connected. After the fork is attached to the finger bar, the bolt is turned, the elastic body is pressed against the back surface of the fork until a predetermined preload is generated, and the fork is prevented by the elastic body by fixing with the nut. doing.

In another conventional structure, a long T-groove is provided in the lower part of the front surface of the finger bar, and an elastic body is provided in the T-groove directly or via a bolt.
As yet another conventional configuration, an elastic body is interposed between a lower hook and a guide ridge provided integrally with the fork,
The elastic body is adhered to the holder, and the preload of the elastic body can be adjusted by applying a bolt to the holder.

[0005]

However, according to the various conventional structures described above, the fork is difficult to move due to the frictional resistance of the elastic body, and the bolt operation cannot be easily performed from behind or below the fork. Further, in the method in which the groove is formed, since the elastic body is arranged over the entire length (lateral direction) of the finger bar, the whole becomes expensive due to material costs and the like, and the disposing work cannot be easily performed.

It is an object of the present invention that the fork can be easily moved, the fork can be fixed firmly, the adjustment operation can be easily performed, and the arrangement can be performed easily and easily. Another object of the present invention is to provide a forklift mounting structure.

[0007]

In order to achieve the above object, a forklift mounting structure of a forklift according to the present invention has a lower receiving portion having a lower inclined front surface at a lower portion of a finger bar. On the inclined rear surface, a lower locking piece that can be opposed from behind is formed, and along the front surface of the lower locking piece, a leaf spring facing the inclined rear face is arranged, and both ends of the leaf spring are The leaf spring is elastically deformed by operating at least one of the connecting members via the connecting members to the left and right ends of the lower engaging piece, and is configured to be pressed against the inclined rear surface.

[0008]

According to the structure of the present invention described above, the leaf spring can be positioned between the inclined rear surface and the front surface and connected to the lower locking piece by operating the connecting tool from the lateral side. Then, by operating the connecting tool in the tightening direction from the side of the fork, the leaf spring can be elastically deformed in an arc shape and can be pressed against the inclined rear surface. As a result, the substantial thickness of the leaf spring is increased, the gap between the inclined rear surface and the front surface is increased, and the clearance between the fork rear surface and the finger bar front surface is eliminated. It can be firmly fixed to the finger bar by force. Therefore, when the fork is attached to the finger bar, no rattling occurs due to the gap generated between the finger bar and the rattling noise.

By applying an external force to the thus fixed fork from the lateral side, the fork can slide with respect to the finger bar, whereby the position and the interval can be adjusted. At this time, the sliding of the fork can be easily and stably performed by bringing the outer surface of the leaf spring into sliding contact with the inclined rear surface, that is, by bringing the metal into sliding contact with each other, while accompanied by elastic deformation of the leaf spring.

When the connecting member is operated in the loosening direction when the fork is moved, the substantial thickness of the leaf spring can be reduced by the elastic force to reduce the gap between the inclined rear surface and the front surface. A gap may be formed between the rear surface of the fork and the front surface of the finger bar, so that the fork can be unlocked, so that it can be more easily slid with respect to the finger bar.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 6, a forklift 1 is provided with a mast 3 in front of a driving unit 2, a backrest 4 guided by the mast 3 and movable up and down, and a pair of upper and lower finger bars 5 on the backrest 4. 6 are provided in the left-right direction. A pair of left and right forks 7, which are engaged and held between the finger bars 5 and 6, are provided separately and slidably in the left and right direction. Both forks 7
Is integrally formed in an L-shape by a vertical plate portion 7A and a horizontal plate portion 7B. A downward upper locking piece (upper claw) 10 is provided on the upper rear surface of the vertical plate portion 7A, and an upward lower locking member is provided on the lower rear surface. Piece (lower nail)
11 are integrally formed.

In FIG. 1 to FIG. 4, on the upper surface of the upper finger bar 5, an upper receiving portion 8 having an upper inclined rear surface 8a that is rearwardly lower is arranged along the length direction (left-right direction) of the finger bar 5. A downwardly directed upper locking piece 10 that is formed and fitted to the upper receiving portion 8 is configured to be able to face the upper inclined rear surface 8a from behind. On the lower surface of the lower finger bar 6, a lower receiving portion 9 having a lower inclined rear surface 9a which is lower in front is formed along the length direction of the lower finger bar 6, and fitted to the lower receiving portion 9. Upward upper locking piece
11 is configured to be able to oppose the lower inclined rear surface 9a from behind.

Along the front surface 11a of the lower engaging piece 11, a leaf spring 12 facing the lower inclined rear surface 9a is disposed in the left-right direction. Here the leaf spring 12 is located in the middle and deformation acting portion 12A of the lateral width W long W ₂ than the _first lower locking pieces 11
And the connecting portions 12B at both ends bent at 90 degrees with respect to the deforming action portion 12A to form a gate shape. Both connecting portions 12B of the leaf spring 12 are connected to left and right ends of the lower locking piece 11 via bolts (an example of a connecting tool) 13, respectively.

That is, the bolts 13 are connected to the connecting portions 12B at both ends.
The lower locking piece 11 is formed at the left and right ends thereof with a screw hole 15 into which a bolt 13 can be screwed, in the left-right direction. Therefore, bolt 13 is inserted into both through holes 14.
From the outside, and insert the tip of this bolt 13 into the screw hole 15
By screwing shallowly into the screw hole, the deformation acting portion 12A of the long W ₂ can connect the leaf spring 12 positioned linearly to the lower locking piece 11, and operate both bolts 13 to the screw hole 15. By screwing deeply, both connecting portions 12B are moved closer to each other, and the deforming portion 12A is elastically deformed in an arc shape.
Is pressed against the lower inclined rear surface 9a. Numeral 16 denotes a detent projection.

The operation of the above configuration will be described below. The leaf spring 12 is formed by screwing a bolt 13 inserted into both through-holes 14 from the lateral side into a screw hole 15 so that a deformation acting portion thereof is formed.
12A is positioned between the lower inclined rear surface 9a and the front surface 11a and is connected to the lower engaging piece 11. At this time, by screwing the tip of the bolt 13 into the screw hole 15 shallowly, as shown in the solid line of FIG. 3 and FIG. 4, the two connecting portions 12B are moved away from each other, and the deformation acting portion 12A is linearly moved. Is located. That is, the substantial thickness of the deformation action portion 12A is reduced, and the gap D between the lower inclined rear surface 9a and the front surface 11a is reduced.
Rear surface 7a of fork 7 and front surface 6a of lower finger bar 6
Is formed between them.

Next, from both sides of the fork 7, the two bolts 13
By operating in the tightening direction, the bolts 13 are gradually screwed deeply, whereby the two connecting portions 12B are moved closer to each other, and the deforming portion 12A is elastically deformed in an arc shape. Most of the portion 12A is pressed against the lower inclined rear surface 9a.

As a result, as shown in the imaginary line of FIG. 3 and in FIG. 5, the substantial thickness of the deforming portion 12A is increased, thereby increasing the gap D between the lower inclined rear surface 9a and the front surface 11a. The gap C between the rear surface 7a of the fork 7 and the front surface 6a of the lower finger bar 6 is eliminated, so that the fork 7 is strongly fixed between the finger bars 5 and 6 by the elastic repulsive force of the deformation action portion 12A. Therefore, in the state where the forks 7 are attached to the finger bars 5, 6, rattling due to the gap formed between the finger bars 5, 6, 7 does not occur, so that no rattling noise is generated.

With the fork 7 fixed in this way,
By applying an external force to the fork 7 from the lateral side, the fork 7 can be slid with respect to the finger bars 5 and 6, and the position and the interval can be adjusted. At this time, the fork 7 slides easily by bringing the outer surface of the deforming portion 12A into sliding contact with the lower inclined rear surface 9a, that is, by bringing the metal into sliding contact with each other, accompanied by elastic deformation of the deforming portion 12A. It is performed stably.

When the fork 7 is moved, when the two bolts 13 are operated in the loosening direction and gradually screwed together, the two connecting portions 12B are moved away from each other, and
A is deformed to the linear side, whereby the substantial thickness of the deforming action portion 12A is gradually reduced, so that the gap D between the lower inclined rear surface 9a and the front surface 11a is reduced, and the rear surface 7a of the fork 7 is A gap C is formed between the lower finger bar 6 and the front surface 6a. Therefore, the fork 7 can be slid more easily with respect to the finger bars 5 and 6 because the fork 7 is released from the fixed state.

In the above embodiment, a pair of bolts (connectors)
Although the form in which the operator operates the bolt 13 is shown in the present invention, the bolt (connector) 13 on only one side may be operated in the present invention. In addition, as a connecting tool indicated by the bolt 13,
Embodiments such as a cam chuck type are also possible.

In the above-described embodiment, a pair of upper and lower finger bars 5 and 6 are shown as finger bars, but this may be a single finger bar that is integrated vertically.

[0022]

According to the present invention having the above-mentioned structure, the fork is finger-operated by the elastic repulsive force of the leaf spring by operating the connecting member from the lateral side to elastically deform the leaf spring and press it against the inclined rear surface. The fork can be fixed to the bar, the operation from the side can be easily performed, and the fork can be fixed firmly without rattling.

The position and distance of the fork with respect to the finger bar can be adjusted by applying an external force to the fork from the lateral side so that the outer surface of the leaf spring is slid on the inclined rear surface, that is, the metals are slid on each other. In addition, it can be easily and stably performed with the elastic deformation of the leaf spring. Further, since a leaf spring having a simpler configuration only needs to be provided on the rear surface side of the fork, the entire structure can be simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a forklift mounting structure of a forklift according to an embodiment of the present invention.

FIG. 2 is a side view of a fork mounting structure of the forklift.

FIG. 3 is a side view of a main part in a fork mounting structure of the forklift.

FIG. 4 is a cross-sectional plan view before fixing in a fork mounting structure of the forklift.

FIG. 5 is a cross-sectional plan view of the forklift when the fork mounting structure is fixed.

FIG. 6 is a perspective view of the forklift.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Forklift 5 Upper finger bar 6 Lower finger bar 7 Fork 8 Upper receiving part 9 Lower receiving part 9a Lower inclined rear surface 10 Upper locking piece 11 Lower locking piece 11a Front face 12 Leaf spring 12A Deformation action part 12B Connection part 13 bolt (connection ingredients) 15 screw hole C clearance D length of lateral width W ₂ deforming action of the gap W ₁ lower locking piece

Claims (1)

(57) [Claims] 1. A lower receiving portion having a rearwardly inclined front surface at a lower position is formed at a lower portion of a finger bar, and a lower locking piece is formed at a lower portion of the fork so as to be able to oppose from the rear side to the inclined rear surface. Along with the front surface of the lower locking piece, a leaf spring facing the inclined rear surface is arranged, and both ends of this leaf spring are connected to the left and right ends of the lower locking piece via respective connecting tools, and at least, A forklift mounting structure for a forklift, wherein a leaf spring is elastically deformed by operating one of the connecting tools to be pressed against the inclined rear surface.