JPH082896A - Slide type clamp attachment for fork lift - Google Patents

Abstract

PURPOSE:To prevent a fixing vis used in the prior art from being not removed due to abrasion of a heads, and prevent a liner from slipping off due to abrasion. CONSTITUTION:In a slide type clamp attachment for a fork lift, liners 17 with respective projections are connected to both ends of a liner 16 which is made of a bearing material and inserted in the guide groove 8 of a holder 15 in the same direction through spring plates 18. The projections 19 of the liners 17 with projections are fitted in holes 15a formed in the holder 15 by the restoring force of the spring plates 18, whereby the liners 17 with projections are fixed in the guide groove 8. Accordingly, the liner 16, both ends of which are clamped by the liners 17 with projections is prevented from slipping out and easily fixed in the guide groove 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide type clamp attachment which is used by being attached to a lift bracket of a forklift, and particularly to a rail which is integrated with the clamp arm and which can slide in the left and right directions. The present invention relates to a fixing means of a liner attached to a sliding surface of a holder that supports and guides the liner.

[0002]

2. Description of the Related Art FIGS. 2 to 9 show general techniques in this technical field as conventional techniques related to the present invention. 2 is a plan view showing a state in which the slide type clamp attachment 2 is attached to the forklift body 1.
Is a side view of the same. In these drawings, 3 is a mast, 4 is a lift bracket attached to an inner mast 3a that can move up and down inside the mast 3, and the clamp attachment 2 is a lift bracket 4 to which a fork is attached during normal cargo handling. Can be attached instead of a fork. The clamp attachment 2 includes a pair of left and right clamp arms 5, which are slightly different in shape from each other on the left and right sides. However, as far as the present invention is concerned, the difference between the left and right shapes does not matter, so treat them as equivalent. To

As shown in FIG. 4, which is a perspective view, a pair of long sliding members called rails 6 each having a concave cross section are integrally formed in pairs in a direction substantially perpendicular to each clamp arm 5. It is installed. The concave grooves of the pair of rails 6 are oriented upside down. The lift bracket 4 on the forklift body 1 side supports the left and right sliding of the rail 6 and moves the clamp arm 5 left and right.
In the holder 7 attached to, the guide grooves 8 into which the rails 6 are slidably inserted are formed by the number of the rails 6. As is clear from FIG. 4, the two rails 6 attached to the left and right clamp arms 5 are attached to the holder 7
It is inserted into the guide groove 8 from the left and right ends of the.

In the example shown in the figure, two holders 7 are vertically provided in parallel, and each holder 7 is provided with two guide grooves 8. The upper and lower holders 7 are connected and integrated by several vertical members 9, and the member connecting the holder 7 and the lift bracket 4 on the forklift body 1 side can also be regarded as one of the vertical members 9.

In order to slide the rail 6 in the guide groove 8 of the holder 7 to move the pair of clamp arms 5 left and right, the clamp arm 5 and the specific vertical member 9 have trunnions 5a, respectively. And 9a are provided, and the pin shaft (not shown) attached to each trunnion is
As shown in FIG. 5 (front view) and FIG. 6 (side view), two ends of two hydraulic cylinders 10 that expand and contract are connected to each other.
In addition, 11 shown in FIG. 4 shows a cover which is attached after the hydraulic cylinder 10 is mounted.

Since the slide clamp attachment 2 for a forklift has such a structure, the hydraulic cylinder 10 can be operated by the operator of the forklift.
By expanding and contracting, the gap between the pair of clamp arms 5 is opened and closed as shown in FIG. 2, and the cargo object is clamped and lifted between them, or the forklift body 1 is run in a clamped state to carry the cargo object. Of the cargo handling object to the right or left as viewed from the forklift body 1 by moving the left and right clamp arms 5 in the same right or left direction as required. You can also In FIG. 2, 5 ′ and 5 ″ shown by a chain line exemplify the moved position of the clamp arm 5.

Although it is not shown in FIGS. 2 to 6 due to its detailed structure, the inner surface of the guide groove 8 of the holder 7 is shown in FIG. (Figure)
A liner 12 having a substantially C-shaped cross section as shown in FIG. The liner 12 is shown in FIG. 8 (exploded perspective view) and FIG.
Unlike the rail 6 and the holder 7, which have a uniform cross-section as shown in (cross-sectional view) and are usually made of steel, a material such as gun metal is used. As the material of the liner 12, a bearing metal such as white metal or a synthetic resin such as fluororesin may be used.

Conventionally, the liner 12 is inserted from the end into the guide groove 8 of the holder 7, the screw 13 is inserted into the hole 12a formed in the liner 12, and the screw 13 is formed in the screw hole 7a formed in the holder 7. Insert the screw into the round head 13
A hexagonal wrench is fitted into the hexagonal hole 13b formed in the center of a and rotated, and as shown in FIG.
The liner 12 was fixed in the guide groove 8 by engaging 3a with the hole 12a of the liner 12 to prevent the liner 12 from coming off.

[0009]

However, in the method of fixing the liner 12 by screwing the screw 13 as in the above-mentioned conventional technique, the inner surface of the liner 12 is worn and the wall thickness of the liner 12 is reduced due to long-term use. At the time of replacement when it became thin, the head 13a of the screw 13 was also worn at the same time, so the hexagonal hole 13b of the head 13a was crushed and the hexagon wrench could not be engaged, and the screw 13 could not rotate. , Liner 12 cannot be replaced, screw 13
Since the hook 14 that engages the head portion 13a and the hole 12a of the liner 12 becomes shallow, the liner 12 may come off the screw 13 and come out of the guide groove 8 of the holder 7.

The present invention addresses such a problem in the prior art, and the hexagonal hole 13b of the screw 13 is crushed so that the liner 12 cannot be replaced, or the liner 12 has a worn head 13 Guide groove 8 of holder 7
It is possible to reliably prevent getting out of the
It is an object of the present invention to provide a novel fixing means having a simple structure and easy to mount.

[0011]

According to the present invention, as a means for solving the above-mentioned problems, a spring plate (a spring plate) is provided on a liner (16) inserted in the guide groove (8) of a holder (15) in the same direction. The liner (17) with a projection is connected via 18), and the projection (19) of the liner (17) with a projection is restored by the restoring force of the spring plate (18) to the holder (15).
The protrusion-provided liner (17) is fixed in the guide groove (8) by being fitted into the hole (15a) formed in the groove, thereby sandwiching both ends between the pair of protrusion-provided liners (17). There is provided a slide type clamp attachment for a forklift, characterized in that the liner (16) to be fixed is fixed in the guide groove (8).

[0012]

Operation: The liner (16) is inserted into the guide groove (8) of the holder (15) in the same direction, and the projection (19) of the liner (17) with projection is formed in the hole (15a) formed in the holder (15). ), The state is maintained by the restoring force of the spring plate (18), so that the liner (17) with a protrusion is fixed in the guide groove (8) of the holder (15). As a result, the liner (1
The liner (16) sandwiched by 7) cannot move in the direction of the guide groove (8) and is easily fixed in that position. The liner (16) can be easily pulled out from the guide groove (8) simply by removing the projection (19) of the projection liner (17) from the hole (15a).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. The feature of the above-mentioned conventional example is the structure of the liner and the holder for receiving it. Therefore, since the entire structure of the clamp attachment 2 including the rail 6 may be substantially the same as the conventional structure, the illustration of the entire structure is also omitted.

As shown in FIG. 1A, the holder 15 in the illustrated embodiment has the same shape as the holder 7 in the conventional example, and a similar guide groove for receiving the rail 6 integrated with the clamp arm 5. 8 has a hole corresponding to the screw hole 7a into which the screw 13 is screwed in the conventional example, but the hole 1 is merely a small opening in which the screw thread is not cut.
There is a difference in that it is 5a.

The liner in this embodiment is shown as 16, and liner 16 has a C-shaped cross-section, similar to liner 12 in the prior art, but unlike the prior art.
Notches 16a having a shape as shown in FIGS. 1B and 1C are formed at both ends. A small L-shaped liner portion 17 is prepared so as to complement the notch 16a, and is swingably connected to the liner 16 by a spring plate 18. Further, the liner portion 17 is provided with a projection 19 for fixing the liner at a position where it can be fitted into the hole 15a of the holder 15. Therefore, the liner portion 17 can be referred to as a protruding liner.

As described above, since the holder 15 and the rail 6 are usually made of a normal steel material and the liner 16 is made of a bearing material such as gun metal, the liner 16 and the liner 17 with a projection are used. The means for connecting the spring plate 18 made of spring steel for connecting the
When molding the liner 17 with protrusions, the most suitable method is to cast both ends of the spring plate 18 into each part thereof, but as another method, brazing, spot welding, etc., if possible. You can also take the method of.

The liner 16 of the embodiment is also inserted from the end of the holder 15 along the guide groove 8. At the time of insertion, the liner 17 with the protrusion is bent by the spring plate 18 as shown in FIG. To facilitate. And protrusion 1
When the projecting liner 17 is pressed at a position where 9 matches the hole 15 a of the holder 15, the projecting 19 fits into the hole 15 a and the projecting liner 17 is fixed in the guide groove 8. At this time, the liner 17 with protrusions is attached to the holder 15
The guide groove 8 may be flush with the liner 16 as shown in FIG. 1 (b). Liner 17 with this protrusion
The fixed state of is mainly maintained by the restoring force of the spring plate 18.

As a result of the protruding liner 17 being fixed to the guide groove 8 of the holder 15 in the notches 16a at both ends of the liner 16, the liner 16 cannot move in the direction of the guide groove 8. Since the liner 16 has a C-shaped cross section, originally, in the guide groove 8 of the holder 15,
Since it is impossible to move in a direction other than the direction of the guide groove 8, the possibility of movement is that the liner 1 with protrusions at both ends
Since it is enclosed by 7, the liner 16 is completely fixed in the guide groove 8.

The fixing means of the liner 16 in the embodiment is different from the fixing means by the head 13a of the screw 13 in the conventional example, and the liner 17 with a protrusion having an L-shaped cross section larger than the head 13a of the screw 13 is the liner 16. Since the liner 17 with protrusions is engaged with the notch 16a and is attached in the guide groove 8 by the protrusions 19 provided on the back side thereof, the liner 1 can be used for a long period of time.
6 or the inner surface of the liner 17 with protrusions is worn, the protrusions 1
Since the 9 is not worn away, it is unlikely that the protruding liner 17 will come off or the liner 16 will come off.

Since the head 13a does not use a screw 13 having a hexagonal hole 13b, there is no possibility that the hexagonal hole 13b will be crushed by abrasion.
When it is necessary to replace 6, the liner 17 with protrusions can be easily removed by simply removing the protrusions 19 from the holes 15a of the holder 15, and the liner 16 can be pulled out from the guide groove 8 of the holder 15. Thereby, the work of exchanging the liner 16 becomes much easier than the conventional example.
Of course, something like the screw 13 is unnecessary.

[0021]

According to the present invention, the liner can be securely fixed in the guide groove of the holder with a simple structure, and even if the liner is worn a little, the projection of the liner with projections is on the back side and is worn. Since it does not occur, there is no risk that the liner fixed in the guide groove will come off and come off. Moreover, since the liner with protrusions can be easily attached and detached, it is possible to obtain an effect that replacement of the liner when the liner is worn becomes extremely easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, (a)
Shows a holder, (b) shows a liner provided with a projection liner, and (c) shows an operating state of a liner provided with a projection liner.

FIG. 2 is a plan view of a forklift equipped with a general slide type clamp attachment.

FIG. 3 is a side view of the forklift of FIG.

FIG. 4 is an exploded perspective view of a general slide type clamp attachment.

FIG. 5 is a front view of a general slide type clamp attachment.

FIG. 6 is a side view of a general slide type clamp attachment.

FIG. 7 is a perspective view generally showing a related structure of a guide groove and a rail of a holder and a liner inserted between them.

FIG. 8 is an exploded perspective view illustrating a conventional means for fixing the liner in the guide groove of the holder.

9 is a cross-sectional view of the means shown in FIG.

[Explanation of symbols]

 1 ... Forklift body 2 ... Clamp attachment 5 ... Clamp arm 6 ... Rail 7 ... Holder 7a ... Screw hole 8 ... Guide groove 10 ... Hydraulic cylinder 12 ... Liner 12a ... Hole 13 ... Screw 13a ... Head 13b ... Hexagonal hole 14 ... Hanging 15 ... Holder (Example) 15a ... Hole 16 ... Liner (Example) 16a ... Notch 17 ... Liner with projection 18 ... Spring plate 19 ... Projection

Claims (1)

[Claims] 1. A spring plate (18) is attached to a liner (16) inserted in the guide groove (8) of the holder (15) in the same direction.
The liner (17) with a projection is connected via the spring, and the projection (19) of the liner (17) with a projection is connected to the spring plate (1).
The liner with protrusions (17) is fixed in the guide groove (8) by being fitted into the hole (15a) formed in the holder (15) by the restoring force of 8), whereby a pair of both ends is provided. A slide-type clamp attachment for a forklift, characterized in that the liner (16) sandwiched between the liners (17) with protrusions is fixed in the guide groove (8).