JP2539929Y2 - Forklift pallet fork clamping device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet fork clamp device of a forklift for performing pallet work and clamp work which can change the opening of both left and right forks.

[0002]

2. Description of the Related Art Attachments of this type are referred to as pallet fork clamps, which perform a clamping operation for clamping a load by opening and closing a pair of forks in the left-right direction and a normal pallet operation. 5 and 6
Fig. 2 shows a general configuration of the attachment. The attachment is configured based on, for example, a holding plate 1 mounted on a lift bracket (not shown). On the front surface of the holding plate 1, a set of two concave rail members 2A,
2B and 3A, 3B are mounted vertically by welding or the like. These rail members 2A, 2B and 3A, 3B
The recesses 2a, 2b facing downward and the recess 3 facing upward, respectively.
a, 3b.

On the other hand, the left and right forks 4 and 5 have upper slide portions 6 and 7 and lower slide portions 8 (see FIG. 6) corresponding to the rail members 2A and 2B and 3A and 3B from the vertical bases, respectively. Extend in opposition to each other. The upper slide portions 6, 7 and the lower slide portions 8, 9 are respectively connected to the rail members 2A, 2B and 3 via rollers 10.
A and 3B are fitted into the respective recesses 2a and 2b and 3a and 3b.

A base of each of the opening and closing cylinders 11, 12 is mounted on the holding plate 1, and a tip 11a of the cylinder 11 for the left fork 4 is connected to a lower slide portion 8 of the fork 4, The tip 12 a of the cylinder 12 for the fork 5 is connected to the upper slide 7 of the fork 5. With such a configuration, the pallet fork clamp type attachment performs a clamping operation and a pallet operation from a wide width to a normal size by controlling the opening of the forks 4 and 5 by mutually operating the cylinders 11 and 12. .

[0005] Reinforcing ribs 13 extending vertically with respect to the horizontal direction of the slide portions 6 to 9 are connected to the slide portions 6 to 9. Further, a cylinder protector 14 is attached to the front surface of the upper rail member 2B and the front surface of the lower rail member 3A.

[0006]

By the way, in order to increase the commercial value and the like, it has become essential to have a single device capable of coping with various operations. This tendency is no exception in the pallet fork clamp. The pallet fork clamp has two types of work functions, pallet work and clamp work.
There has been an increasing demand from general users for a two-pallet work function that improves work efficiency.

[0007] However, the conventional pallet fork clamp has only the main fork, so that two pallet operations cannot be performed. The present invention has been made in view of the above circumstances, and has as its object to enable two pallet operations in an attachment for performing pallet fork clamping.

[0008]

According to the present invention, a holding plate which is mounted on a lift bracket of a forklift and has left and right rail members above and below, and an upper and lower slide portion fitted to the upper and lower rail members, respectively, are vertically arranged. The vehicle includes a left and right outer fork extending from the rear surface of the base, an upper and lower fork bar integrally formed along the upper and lower slide portions, and a left and right auxiliary fork detachably attached to the upper and lower fork bar. .

In a preferred embodiment, each of the upper and lower fork bars is capable of variably adjusting a mounting position of each auxiliary fork.

[0010]

According to the present invention, the left and right auxiliary forks are mounted on the upper and lower fork bars extending from the two main forks, so that two sets of forks, each main fork and the auxiliary fork, are arranged in parallel. By performing the opening adjustment operation on the two sets of forks in the same manner as in the clamping operation, a two-pallet operation in which two pallets arranged in parallel at an arbitrary interval are simultaneously performed becomes possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in FIGS. Note that components equivalent to those of the conventional device are denoted by common reference numerals. The pallet fork clamp device of the forklift according to the present invention extends horizontally from the back surfaces of the vertical bases 4a, 5a of the two main forks 4, 5 corresponding to the rail members 2A, 2B and 3A, 3B of the holding plate 1. The upper and lower fork bars 15 to 18 serving also as reinforcing ribs are formed integrally with the respective slide portions 6, 8 and 7, 9 along the respective slide portions 6, 8 and 7, 9, respectively. The left and right auxiliary forks 19, 20 are mounted on the main forks 18 to 18 at predetermined intervals from the main forks 4, 5.

At the upper ends of the upper fork bars 15 and 16, a concave portion 21 is extended, and a large number of concave portions 22 for positioning are formed in parallel with the concave portion 21.
The lower fork bars 17 and 18 also have recesses 24 at the lower ends.
Is extended. On the other hand, an upper hook 25 is attached above the vertical bases of the auxiliary forks 19 and 20 so as to face the upper ends of the upper fork bars 15 and 16. The upper hook 25 is formed with a convex portion 25a that fits into the concave portion 21 and fixed to the concave portion 22 by protruding and retracting into a groove 26 formed by the convex portion 25a and the vertical base. The user member is inserted from the upper end of the upper hook 25 (not shown).

A lower hook 27 is mounted below the vertical base of each of the auxiliary forks 19, 20 so as to face the lower ends of the lower fork bars 17, 18. The lower hook 27
As shown in FIG. 3, for example, is fixed by a bolt 28 that penetrates the lower hook 27 in the thickness direction and is fastened to the vertical base. The lower hook 27 is formed with a projection 27a that fits into the recess 24 of the lower fork bar 17,18.

The slide portions 6 to 9 extending from the fork bars 15 to 18 are provided with the corresponding recesses 2a, 2b, 3a of the corresponding rail members 2A, 2B, 3A, 3B via rollers 10 as in the prior art. , 3b and each cylinder 1
The two main forks 4 and 5 are configured to move left and right relative to each other by the operation of the first and second 12 (see FIG. 4). Therefore, according to the attachment having such a configuration, the auxiliary pallets 19 and 20 are mounted on the main forks 4 and 5 at positions spaced from each other by a distance corresponding to the pallet width. It becomes possible.

Moreover, in this attachment, the distance between the auxiliary forks 19, 20 can be changed according to the movement of the two main forks 4, 5, so that by adjusting this distance in accordance with the interval between the parallel pallets, It is possible to set the pallet interval in any way. Auxiliary fork 1
The hooks 9 and 20 are provided in the recesses 2 of the upper fork bars 15 and 16.
The engaging position is determined by fitting the convex portion 25a of the upper hook 25 into 1. At this time, as shown in FIG. 3B, the bolt 28 of the lower hook 27 is loosened, and the lower hook 27 is rotated and retracted so that the projection 27a is on the lower side. And
When the fitting of the upper hooks 25 to the upper fork bars 15 and 16 is completed, the lower hooks 27 are rotated to fit the convex portions 27a into the concave portions 24 of the lower fork bars 17 and 18, and fix them with bolts. .

As another mounting method, the upper and lower hooks 25 and 27 can be fitted from the ends of the upper and lower fork bars 15 to 18 so that the auxiliary forks 19 and 20 can be inserted and mounted. In this case, the lower hook 27 is the upper hook 2
5 can be fixed. When the auxiliary forks 19 and 20 are not mounted, the protector 14
(See FIG. 5), the auxiliary fork 1
9 and 20 are mounted without the protector 14. When the auxiliary forks 19, 20 are mounted, the auxiliary forks 1
Reference numerals 9 and 20 function as the protector 14.

Further, in the above description, the method of setting the distance between the auxiliary pallets 19 and 20 corresponding to the two-pallet operation has been described, but the auxiliary pallets 19 and 20 are mounted close to the two main forks 4 and 5. By doing so, the load can be held more stably than when working with one fork.

[0018]

As described above, in the present invention, the upper and lower forks are extended from the two main forks, and the left and right auxiliary forks are detachable from the upper and lower forks. And two sets of forks are made,
The pallet fork clamp enables two pallet operations.

[Brief description of the drawings]

FIG. 1 is a front view showing a pallet fork clamp device of a forklift according to the present invention.

FIG. 2 is a perspective view showing one of the above devices.

FIG. 3 is an explanatory view showing a method of fitting a lower hook according to the present invention.

FIG. 4 is a sectional view taken along the line AA of FIG. 1;

FIG. 5 is an exploded perspective view showing a conventional pallet fork clamp.

FIG. 6 is a front view in which FIG. 5 is assembled.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holding plate, 2A, 2B, 3A, 3B ... Rail member, 4, 5 ... Fork, 6-9 ... Slide member, 11,
12 ... open / close cylinder, 15, 16 ... upper fork bar,
17, 18: lower fork bar, 19, 20: auxiliary fork, 25: upper hook, 27: lower hook.

Claims (1)

(57) [Scope of request for utility model registration] 1. A holding plate which is mounted on a lift bracket of a forklift and has left and right rail members vertically, and a left and right main part extending from a vertical base rear surface with upper and lower slide portions respectively fitted to the upper and lower rail members. A pallet fork clamp for a forklift, comprising: a fork; an upper and lower fork bar integrally formed along the upper and lower slide portions; and a left and right auxiliary fork detachably attached to the upper and lower fork bar. apparatus.