JPH07285793A - Side shift device for forklift - Google Patents

Abstract

PURPOSE:To provide a vehicle with a side shift which is constituted to sharply reduce the thickness and the weight of the side shift of a forklift, prevent reduction of a live load through minimization of the front movement distance of a fork, and have loading capacity approximately equivalent to that of a standard vehicle. CONSTITUTION:Instead of a finger bar attached to the front surface of a carriage 1, a support member 2 in a J-shape in cross section the opening part of which is in an up state and a plate-form lower plate 3 are fixed vertically in parallel. The upper finger cover 6a of a front plate 6 is engaged with a support member 2 through a weir strip 8 and a lower finger bar 6b is engaged with a lower plate 3 through a liner 9. This constitution sharply reduces the thickness and the weight of a side shift device, minimizes the front movement distance of a fork 7, and prevents reduction of live load capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side shift device which is one of attachments for forklifts.

[0002]

2. Description of the Related Art In a forklift, a side shift device is known as an attachment that can move the position of the fork to the left and right in the vehicle width direction.

As shown in FIG. 2, a conventionally known side shift device has a finger bar 2a of a carriage (lift bracket) 1 that moves up and down along a mast of a standard vehicle, and a finger bar 2b of a front plate for supporting a fork.
The opening attached to the back surface of the upper hook 4 is formed by hooking the upper hook 4 having a reverse J-shaped cross section, and the reverse J-shaped upper hook 4 is extended along the finger bar 2a of the carriage 1 by the expansion and contraction of the side shift cylinder. The fork can be moved left and right by sliding it. (See, for example, Japanese Utility Model Publication No. 63-48798 and Japanese Utility Model Publication No. 63-48799).

Therefore, the position of the fork is more than the thickness L _{1 of the} upper hook 4 as compared with the standard vehicle without the side shift device.
And the distance L corresponding to the total of the thickness L ₂ of the finger bar 2a (2b).

As a result, the load point is also distance L compared to the standard vehicle.
Since the vehicle is moved forward by (= L ₁ + L ₂ ), the allowable loading capacity of the forklift truck with side shift is inevitably lower than that of the standard vehicle.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. The thickness and weight of the side shift device can be greatly reduced, and the forward movement distance of the fork 7 can be reduced. The present invention intends to provide a vehicle with a side shift having a loading capacity almost equal to that of a standard vehicle by preventing the reduction of the loading load by minimizing the load.

[0007]

SUMMARY OF THE INVENTION The present invention provides means for solving the above problems, in which a cross section J with an opening facing upward is provided on the front surface of a carriage 1 which can be raised and lowered along a mast (not shown). The character-shaped support member 2 and the flat plate-shaped lower plate 3 are fixed in parallel to each other in the vertical direction, and the fork 7 is suspended on the front surface of the front plate 6 composed of the vertically parallel finger bars 6a and 6b connected by the vertical connecting member 5. The upper finger bar 6a is provided with a concave groove having an opening downward, and the rear surface of the lower finger bar 6b is a smooth flat surface.
The upper finger bar 6a is engaged with the support member 2 via the wear strip 8, and the lower finger bar 6b is engaged with the lower plate 3 via the liner 9, respectively.
The subject matter of the invention is a side shift device for a forklift characterized in that the front plate 6 can be moved left and right by a side shift cylinder 10.

[0008]

According to the side shift device of the present invention, the position of the fork 7 is only moved forward by the thickness L ₁ of the support member 2 as compared with the standard vehicle. The movement distance corresponding to the thickness L ₁ of the support member 2 is the movement distance L (= L ₁ +
Compared to L ₂ ), it is very small, and usually L ₁ << L can be satisfied, so it can be said that the influence on the reduction of the load is negligible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is a carriage which is an elevating member which elevates and lowers along a mast (not shown).
A supporting member 2 having a J-shaped cross section with an opening facing upward, and a lower plate 3 having a flat plate shape are horizontally fixed in parallel to the lower part of the front surface. The support member 2 is shown in FIG.
The upper hook 4 and the opening have the same shape except that the orientation of the opening is upside down, and the thickness L ₁ thereof is also the same.

Reference numeral 6 is a front plate composed of vertically parallel finger bars 6a and 6b, which are connected to each other at the left and right ends and in the middle places by a plurality of vertical connecting members 5, and a fork 7 is suspended on the front surface thereof. The upper finger bar 6a is provided with a concave groove having an opening downward, and the back surface of the lower finger bar 6b is a smooth flat surface. The thickness L of the finger bars 6a and 6b
₂ is the same as the thickness L ₂ of the finger bar in the conventional example shown in FIG.

The upper finger bar 6a is slidably engaged with the support member 2 via a wear strip 8 and the lower finger bar 6b is slidably engaged with the lower plate 3 via a liner 9, respectively. . The wear strip 8 and the liner 9 serve to reduce friction during sliding and prevent wear.

Reference numeral 10 denotes a side shift cylinder, which is expanded and contracted to fork 7 via the front plate 6.
It is well known that the can be shifted left and right.

According to the conventional example shown in FIG. 2, since the fork 7 is supported by the finger bar 2a of the carriage 1 via the upper hook 4 and the finger bar 2b, the position of the fork 7 is higher than that of the standard vehicle. and it had to move forward by the thickness of the upper hook 4 L ₁ and the finger bar 2a total distance _{L (= L 1 + L 2} ) of the thickness of (2b) L _2, according to the side shift device of the present invention For example, it only moves forward by a distance corresponding to the thickness L ₁ of the support member 2.

Specifically, in the standard car,
Since the fork 7 is directly suspended on the finger bar 2a of the carriage 1, the distance of the suspension position of the fork 7 from the front surface of the carriage 1 is equal to the thickness L ₂ of the finger bar 2a. ... A

In the conventional example shown in FIG. 2, since the fork 7 is suspended on the finger bar 2a of the carriage 1 via the upper hook 4 and the finger bar 2b, from the front surface of the carriage 1 at the suspension position of the fork 7. Is equal to the total thickness of the upper hook (L ₁ ) and the thickness of the two finger bars 2a and 2b (2L ₂ ). That is, L ₁ + 2L ₂ . ... B

On the other hand, according to the side shift device of the present invention, since the fork 7 is suspended by the finger bar 6a that engages with the support member 2 of the carriage 1, from the front surface of the carriage 1 at the suspension position of the fork 7. distance is equal to the total thickness of the support member 2 and (L ₁₎ and the thickness of the finger bar 6a (L _2), the L ₁ + L _2. ... C

The difference between A and B is L ₁ +2 L ₂ -L ₂ = L ₁ +
L ₂ = L, and in the case of the conventional example shown in FIG. 2, the fork 7
The position B is moved forward by a distance L (= L ₁ + L ₂ ) as compared with the standard vehicle A.

Similarly, the difference between A and C is L ₁ + L ₂ −L ₂ = L ₁
Therefore, according to the present invention, the position of the fork 7 is slightly smaller than that of the fork position A of the standard vehicle by the thickness of the support member 2.
It only moves forward a distance equivalent to L ₁ . Comparing the distances L and L ₁ , since L ₁ << L, the influence on the reduction of the load is extremely small and can be almost ignored.

[0019]

According to the present invention, in place of the finger bar conventionally mounted on the front surface of the carriage 1, the J-shaped cross-section supporting member 2 having an upward opening and the flat lower plate 3 are fixed in parallel vertically. The upper finger bar 6a of the front plate 6 is engaged with the support member 2 via the wear strip 8 and the lower finger bar 6b is engaged with the lower plate 3 via the liner 9, respectively. Also, since the weight can be significantly reduced and the forward movement distance of the fork 7 can be reduced, there is an effect that it is possible to obtain almost the same load carrying capacity as a standard vehicle while including the side shift device.

[Brief description of drawings]

FIG. 1 shows a structure of a side shift device of the present invention,
(A) is a side view and (b) is a front view.

FIG. 2 is a side view of a conventional example.

[Explanation of symbols]

 1 Carriage 2 Support Members 2a, 2b Finger Bar (Conventional Example) 3 Lower Plate 4 Upper Hook (Conventional Example) 5 Connecting Member 6 Front Plate 6a Upper Finger Bar 6b Lower Finger Bar 7 Fork 8 Wear Strip 9 Liner 10 Side Shift Cylinder

Claims (1)

[Claims] 1. A carriage (1) which can move up and down along a mast has a J-shaped cross-section supporting member (2) having an opening facing upward and a flat lower plate (3) fixed vertically and in parallel to each other. A fork (7) is suspended on the front surface of a front plate (6) consisting of vertically parallel finger bars (6a, 6b) connected by a directional connecting member (5),
The upper finger bar (6a) is provided with a concave groove having an opening downward, and the rear surface of the lower finger bar (6b) is a smooth flat surface, and the concave groove of the upper finger bar (6a) is a wear strip (8). To the support member (2) via
The back surface of the lower finger bar (6b) is engaged with the lower plate (3) through the liner (9),
A side shift device for a forklift, wherein the front plate (6) can be moved left and right by a side shift cylinder (10).