JP2873754B2 - Forklift side shift 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 side shift device of a forklift capable of laterally moving a cargo handling device such as a fork or various attachments with respect to a lift bracket, and particularly easily mounted on a standard forklift. The present invention relates to a side shift device that can be used.

[0002]

2. Description of the Related Art Reach type forklift 1 shown in FIG.
A lift bracket 5 is provided on a lift cylinder 3 disposed behind the mast 2 via a chain (not shown) so as to be able to move up and down in the mast 2, and the lift bracket 5 is provided with a fork 4 as a cargo handling tool. Is moored.

The details of this configuration will be described with reference to FIG.
The lift bracket 5 has a substantially frame shape, and tilt cylinders 7, 7 for tilting the forks 4, 4 are provided on the inner surfaces of the left and right side plates 8, 8.
Is installed. A support 9 provided with support pieces 10, 11, 12 for supporting a fork shaft 14 for mooring and holding the forks 4, 4 is provided on an upper portion of the lift bracket 5.

Further, a tilt frame 13 is anchored to the support 9 by the fork shaft 14 so as to be tiltable. The tilt frame 13 is configured such that a lower plate 16 fixed to a lower portion thereof can be tilted by being pressed by the tilt cylinders 7, 7.

[0005] Side supports 1 are provided on both left and right sides.
5 and 15 are welded, and the side supports 15 and 1 are welded.
The inner surface of 5 is provided with bearing pieces 10, 1 at both ends of the support 9.
2 are located on the outer surfaces.

The forks 4 have pipe-shaped moorings 17 at their upper ends, and are inserted in the fork shaft 14 so as to be able to move laterally. Incidentally, 4
3 are adjustment holes for positioning the fork 4, and 44 is a set pin. The above configuration is the configuration of the cargo handling unit of the so-called standard type reach forklift.

Next, when the fork 4 is mounted with a side shift device capable of moving the fork 4 laterally with respect to the lift bracket 5, the structure shown in FIGS. In the drawing, the same components as those in the case of the cargo handling portion configuration of the forklift of the standard specification described above are denoted by the same reference numerals, and the lift bracket 5 and the tilt frame 13 can be shared as they are. A support pin 19 for fixing a shift cylinder 18 is welded to the upper surface of the support 9, and the forks 4, 4 are further moored and held on the tilt frame 13 via a shift frame 20 in front of the tilt frame 13. Must.

The shift frame 20 has a front plate 21 having an opening 22 at a substantially central portion for securing a front view, and is formed above the front plate 21.
The pipe-shaped mooring portions 23, 23 that are moored and held on the fork shaft 14 so as to be laterally movable, and the upper plate 26 that fixes side supports 47, 47 to both side portions thereof and connects the side supports 47, 47, The upper plate 26 includes a protruding piece 27 extending toward the lift bracket 5 and having a hole 28 formed at a tip thereof.

The mooring portions 23 are inserted into a fork shaft, and a piston rod 18A of a shift cylinder 18 is fixed to a hole 28 of the protruding piece 27.
At the upper and lower ends of the front plate 21, an upper rail 24 and a lower rail 29 for supporting the forks 4 and 4 so as to be able to move laterally are formed. The structure of the mooring portions 4 and 4 also has hook portions 30 and 31 formed at the top and bottom as shown in the figure.
In the lower central portion of the front plate 21, a support portion 2 is provided.
The shift frame 20 is integrally held to the extent that the shift frame 20 can move laterally with respect to the tilt frame 13.

Since the piston rod 18A of the shift cylinder 18 is expanded and contracted, the shift frame 20 holding the forks 4, 4 is structured as described above.
Can be moved laterally with respect to the fork shaft 14.

In general, when a pallet is transported by a forklift, the left and right forks 4, 4 are inserted into a space of a pallet (not shown) and scooped up. In order to make the center coincide with the center of 4, the skill of the cargo handling operation is required, and not everyone can easily perform the operation.

Therefore, by mounting the side shift attachment as described above, even if the center of the pallet and the center of the left and right forks are slightly displaced and the forklift is positioned, the shift cylinder 18 can be moved. By expanding and contracting, the centers of the forks 4, 4 are moved to the center of the pallet to facilitate the cargo handling operation.

[0013]

However, when the side shift device is mounted, it is necessary to weld the support pin 19 to the upper surface of the support 9 as is apparent from a comparison between FIG. 4 and FIG. Therefore, if the customer who purchased the standard forklift wants to install the side shift device after purchase, the customer cannot perform the work of installing the side shift device at the customer, and once the forklift has been designated by the manufacturer. The actual situation is that the product is picked up at a factory or the like, then the side shift device is attached, and then delivered to the customer again.

[0014] Such a method has a problem that a forklift maker requires a lot of labor to take up and deliver the forklift, and to prepare a substitute vehicle during the installation period. On the other hand, users of forklifts have also been required to immediately attach the side shift device.

When the side shift device is mounted, the structure of the mooring portions of the forks 4 and 4 is changed to a pipe-shaped mooring portion 17.
Therefore, the forks 4 and 4 need to be replaced with new forks 4 and 4, which hinders standardization of components. The present invention has been devised in view of such circumstances, and its purpose is to:
Once the standard forklift delivered to the customer,
An object of the present invention is to provide a forklift side shift device that can be easily mounted at a customer site.

[0016]

SUMMARY OF THE INVENTION The present invention relates to a forklift side shift device capable of laterally moving a cargo handling device such as a fork or various attachments with respect to a lift bracket, and a fork shaft inserted through the lift bracket. Moored at
A cylinder support, the movement of which is suppressed in a lateral direction by a support piece for supporting the fork shaft, and a shift cylinder equipped with a piston rod capable of extending and contracting in the lateral direction are mounted on the cylinder support; A shift carriage moored and held in a state where it can be moved laterally;
The shift carriage is provided with a cargo support unit for holding a cargo implement such as a fork or various attachments, and one end of the shift cylinder is connected to the shift carriage.

[0017]

According to the present invention, as shown in FIG. 1 and FIG. 2, the shift cylinder 33 is provided after the fork shaft 14 is first removed, the forks 4, 4 are removed from the standard cargo handling section configuration. The cylinder support 32 and the shift carriage 36 for mooring and holding the fork are collectively mounted on the lift bracket 5 using the fork shaft 14,
Thereafter, the forks 4 and 4 may be mounted on the shift carriage 36, and the work such as welding can be eliminated.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the figure, the same reference numerals are given to the same components as those in the case of the above-described standardized forklift cargo handling unit configuration. The lift bracket 5 and the tilt frame 13 are the same as before,
The fork shaft 14 further includes a cylinder support 3.
2 and the shift carriage 36 are moored and held.

The cylinder support 32 has a substantially "L" shape, and has a piston rod 33 which can extend and contract in the lateral direction at a substantially middle portion.
The plate 34 includes a plate 34 on which a shift cylinder 33 provided with an A is pivotally mounted by a fixture 35, and bearing pieces 45, 46 formed at the upper right and left ends of the plate 34.

The support pieces 45, 46 of the plate 34 are located on the inner surfaces of the support pieces 11, 12 of the support 9, respectively, and are dimensioned so that they cannot move in the lateral direction when the fork shaft 14 is inserted. It is decided,
It is possible to tilt about the axis of the fork shaft 14.

The shift carriage 36 has a substantially frame shape, and includes a lower plate 40, side supports 47, 47 fixed to both ends thereof, an upper plate 38 and an intermediate plate 48 connecting the side supports 47, 47 to each other. The shaft 37 is used as a cargo handling device support for mooring and holding the fork 4, and a positioning hole 43 and a set pin 44 similar to those of the related art are used for positioning the fork 4.

The intermediate plate 48 has moorings 39, 39.
Is fixedly inserted into the fork shaft 14 so that the piston rod 33A of the shift cylinder 33 is pivotally attached to one side of the side support 47 by a pin, a bolt, or the like. Bracket 41 is fixed. Therefore, when the piston rod 33A of the shift cylinder 33 is expanded and contracted,
The shift carriage 36 can be moved laterally with respect to the lift bracket 5. Note that the shift carriage 36
For example, shoes, rollers, etc. (not shown) that contact the lower plate 40 of the shift carriage 36 can be provided on the lower plate 16 so as to ensure smooth lateral movement with respect to the tilt frame 13.

Because of the above-described structure, the fork shaft 14 is first removed from the structure of the standard cargo handling section (see FIG. 4), the forks 4, 4, and then the cylinder support 32 and the fork are removed. Of the shift carriage 36 is collectively mounted on the lift bracket 5 using the fork shaft 14, and then the shaft 37 of the shift carriage 36 is pulled out and the forks 4, 4 are removed.
(See FIG. 2), a simple assembling operation is sufficient, and the welding operation can be completely eliminated.

Therefore, if the shift carriage 36 and the cylinder support 32 are prepared in advance by a forklift manufacturer, for example, as an assembly kit for a side shift, the manufacturer can sell the side shift device in response to a request from a customer for mounting the side shift device. Deliver the assembly kit to a distributor, etc., and install the side shift device at the distributor,
Removal will be immediate.

In this embodiment, the reach type forklift is exemplified and described in detail. However, it is needless to say that the present invention can be applied to a counterbalance type forklift. In this case, the counterbalance type forklift employs a so-called mast tilt type in which the mast is tilted back and forth, so that the tilt frame 13 shown in this example is not required. Further, the shaft 37 has been exemplified as an example of the cargo handling device support portion, but a rail type configuration may be appropriately adopted. Further, the arrangement position of the shift cylinder 33 can be made closer to one of the upper and lower sides to improve the forward visibility, and the cargo handling equipment is not limited to the fork shown in this example.

[0026]

According to the present invention, as a result of employing the above configuration,
The customer who purchased the standard forklift,
Even if you want to install the side shift device, no welding is required for the installation work, it is very easy and quick to install the side shift device at the customer, and in addition to the designated factory for the forklift It is possible to eliminate the cost of transportation such as picking up products to customers and delivery to customers. Also, even if the side shift device is installed, it is not necessary to replace the fork newly, and it is sufficient to use all the components of the standard specification and add the components of the side shift device to this. There is also an advantage on the manufacturer side that it can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing one embodiment of the present invention.

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

FIG. 4 is an exploded perspective view showing a configuration of a cargo handling unit of a reach-type forklift of a standard specification.

FIG. 5 is a front view showing a conventional side shift device.

FIG. 6 is an exploded perspective view showing a conventional side shift device.

[Explanation of symbols]

 Reference Signs List 4 fork 5 lift bracket 7 tilt cylinder 8 side plate 9 support 10 support piece 11 support piece 12 support piece 13 tilt frame 14 fork shaft 32 cylinder support 33 shift cylinder 34 plate 35 fixture 36 shift carriage 37 shaft 38 upper plate 39 mooring portion 40 lower plate 41 bracket 42 mounting tool 45 bearing piece 46 bearing piece

Claims (1)

(57) [Claims] 1. A forklift side shift device capable of laterally moving a cargo handling device such as a fork or various attachments with respect to a lift bracket.
A cylinder support, which is moored and held by a fork shaft inserted through the lift bracket and is prevented from moving in the lateral direction by a support piece that supports the fork shaft, and a cylinder support that is laterally moved. A shift cylinder equipped with a telescopic piston rod is mounted, and a shift carriage moored and held on the fork shaft so as to be able to move laterally, and the shift carriage holds a cargo handling device such as a fork or various attachments. A side shift device for a forklift, comprising a loading / unloading device support portion and having one end of the shift cylinder connected to the shift carriage.