JPH09227096A - Back rest device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct single side multiple-line stacking work with high efficiency, in a back rest device which is used for a loading/unloading vehicle, by mounting a back rest device capable of elevating on a carriage, and elevating the back rest through a cylinder fitted on the carriage. SOLUTION: For the work with a fork, a cylinder 5 is shortened to elevate a back rest 4 around a horizontal bar 19. At this time, the back rest 4 is kept in a perpendicular position with the grid part positioned above a finger cover 6 and brought into contact with an inhibiting material 20. For push-in work, the cylinder 5 is expanded to elevate the back rest 4 around the horizontal bar 19. The back rest 4 is placed on the horizontal component of a fork 3 and kept at a horizontal position. A top plate 15 is protruded forward from the front end of the horizontal component 12. The back rest 4 serves as a pressing element capable of pressing-in a pallet load forward by bringing the top plate 15 into contact with a part near the insert of the fork.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a backrest device applied to a cargo handling vehicle such as a forklift truck.

[0002]

2. Description of the Related Art As shown in FIG. 4, when a pallet load 60 (a load placed on a pallet 61) is loaded on a loading platform 71 of a truck 70 by a cargo handling vehicle 50 such as a forklift truck from both sides of the loading platform 71. It is common to carry out loading work, but since one side bypasses the truck 70 and carries it, the carrying efficiency was poor. In addition, when loading on only one side, there are various cargo handling attachments such as long forks, pushers, and extension forks for loading on the back side of the loading platform 71, but if these are mounted, the overall length of the cargo handling vehicle 50 increases, There are disadvantages such as reduced mobility in the warehouse 80 and reduced load capacity. Therefore, in the actual work of the one-sided double-row loading, as shown in FIG. 5, after the pallet load 60 is placed on the loading platform 71 of the truck 70, an operator other than the driver of the cargo handling vehicle 50 can load the pallet 6 onto the pallet 6.
This is done by placing an interposition material 90 such as a square bar in front of No. 1 and pushing the tip of the fork 51 of the cargo handling vehicle 50 against the interposition material 90 and pushing it into the back side of the loading platform 71. However, in such a work, the inclusion 90 and an operator for placing the inclusion 90 are required, and the work efficiency is poor and uneconomical.

By the way, as the backrest device, for example, JP-A-59-128200 and JP-A-61-322.
The one described in No. 00 is known. These are basically composed of a carriage, a fork provided on the carriage, a backrest provided on the carriage so as to be elevated from a vertical position to a horizontal position, and a holding means for holding the backrest at the vertical position. ing. Thus, such a thing functions as a backrest if the backrest is raised, and as a luggage carrier if the backrest is laid down. However, with such a thing, if the backrest is laid down and placed in a horizontal position, it is possible to push the pallet load forward by engaging the tip of the backrest with the vicinity of the pallet fork insertion port, Since the backrest had to be lifted down by lifting the holding means due to human power, the pushing work could not be performed immediately after the fork work, and the one-sided stacking work could not be performed efficiently.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention has been devised to solve this problem, and the purpose thereof is to efficiently carry out double-sided loading operation on one side. It is to provide a backrest device capable of

[0005]

The backrest device of the present invention basically comprises a carriage, a fork provided on the carriage, and a backrest provided on the carriage so that the carriage can be elevated from a vertical position to a horizontal position. It is characterized in that it is composed of a cylinder provided on the carriage for elevating the backrest.

When performing a fork work, the backrest is raised by the cylinder to be in a vertical position. Then, the backrest functions as a back support body, and the back surface of the pallet load scooped by the fork can be engaged therewith to support the pallet load, and the load collapse can be prevented. When performing the pushing operation, the backrest is lowered by the cylinder and is placed in a horizontal position. Then, the backrest functions as a pressing body, and the front portion can be fitted to the vicinity of the fork insertion port of the pallet to push the pallet load forward. Since the backrest is raised and lowered depending on the cylinder, the pushing work can be performed immediately after the fork work, and the one-sided double-row loading work can be efficiently performed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a backrest device of the present invention in which the backrest is in a vertical position. FIG. 2 is a view similar to FIG. 1, showing a state in which the backrest is in a horizontal position. FIG. 3 is a side view showing a single-sided double-row loading procedure of a pallet load.

The backrest device 1 is composed of a carriage 2, a fork 3, a backrest 4, and a cylinder 5 as its main components.

The carriage 2 serves as a basic part of the backrest device 1. In this example, the upper and lower finger bars 6, the left and right lift brackets 7 provided on the middle rear surface of these, and the finger bars 6 are provided. Left and right side plates 8 that connect the end portions, upper and lower protrusions 9 formed on the upper and lower outer sides of both finger bars 6 (upper side of upper finger bar 6 and lower side of lower finger bar 6), and lower finger bar 6 And a notch 10 formed on the lower side of the center of the.

The forks 3 are provided on the carriage 2. In this example, the forks 3 are located on the left and right sides, have a substantially L shape, and have a vertical piece 11 and a horizontal piece 12 extending forward from the lower end of the vertical piece 11.
And the upper and lower claw pieces 13 provided on the back surface of the vertical piece 11 and laterally movably engaged with the protrusions 9 of the carriage 2.

The backrest 4 is provided on the carriage 2 so that it can be elevated from a vertical position to a horizontal position. In this example, the backrest 4 has a substantially gate shape, and left and right side plates extending upward from both sides of the side plate 8 of the carriage 2. 14, an upper plate 15 that connects these upper parts, a middle plate 16 that connects the middle positions of both side plates 14, and two left and right vertical plates 17 that connect the upper plate 15 and the middle plate 16, The left and right side plates 14 and the horizontal plates 18 connecting the vertical plates 17 adjacent to the left and right side plates 14 are provided, and the back support body has sufficient strength to function as a pushing body from the beginning. Upper half of both side plates 14, upper plate 15, middle plate 16 and vertical plate 1
7 and the horizontal plate 18 form a lattice part and both side plates 1
The lower half of 4 forms the leg. The lower parts of both side plates 14 which are legs are pivotally connected to the lower part of the side plate 8 of the carriage 2 by a horizontal shaft 19, and the lattice part is located above the finger bars 6 and above the horizontal piece 12 of the fork 3. It is designed so that it can be lifted up to the horizontal position. The upper plate 15 has an appropriate width so as to form a mating surface that mates with the vicinity 62 of the fork insertion port of the pallet 61. At the upper front part of the lift bracket 7 of the carriage 2, a blocking member 2 that abuts on the backrest 4 in a vertical position and blocks the rearward leaning of the backrest 4.
0 is provided.

The cylinder 5 is provided on the carriage 2 to raise and lower the backrest 4. In this example, the cylinder 5 is a fluid pressure cylinder, and is provided on the lift bracket 7 of the carriage 2 and the middle plate 16 of the backrest 4. It is pivotally connected to the bracket 21 by a horizontal shaft 22. The cylinder 5 is connected to a fluid pressure generation source (not shown) mounted on the cargo handling vehicle 50 so that it can be controlled from the driver's seat 52.

Next, the operation will be described based on such a configuration. When performing a fork operation, see FIG. 1 and FIG.
As indicated by the solid line, the backrest 4 is lifted up around the horizontal shaft 19 and set in the vertical position by the shortening operation of the cylinder 5. At this time, the lattice of the backrest 4 is positioned above the finger bars 6 of the carriage 2, and the backrest 4 is brought into contact with the blocking member 20 to be maintained in the vertical position. The backrest 4 functions as a back support, and the back surface of the pallet load 60 scooped into the fork 3 can be engaged therewith to support the pallet load 60, thus preventing the load from collapsing. When performing the pushing operation, as shown by the chain line in FIGS. 2 and 3, the backrest 4 is bent down around the horizontal shaft 19 to be in a horizontal position due to the extension operation of the cylinder 5. At this time, the backrest 4 is placed on the horizontal piece 12 of the fork 3 and kept at the horizontal position, and the upper plate 15 as the tip portion is projected forward from the tip of the horizontal piece 12 of the fork 3. The backrest 4 functions as a pressing body, and the upper plate 1
The pallet load 60 can be pushed forward by fitting 5 into the vicinity of the fork insertion opening 62 of the pallet 61. Since the backrest 4 is raised by using the cylinder 5,
The pushing work can be performed immediately after the fork work, and the double side loading work can be performed efficiently.
That is, when carrying out the double-sided single-side loading work, after the pallet load 60 is scooped by the fork 3 and placed on the loading platform 71 of the truck 70, the cylinder 5 is extended from the driver's seat 52 of the loading vehicle 50. Activate. Then,
The backrest 4 is laid down on the fork 3 to be in a horizontal position, and the upper plate 15 of the backrest 4 is fitted to the vicinity of the fork insertion opening 62 of the pallet 61 according to the forward movement of the cargo handling vehicle 50 to load the pallet load 60. It can be pushed into the back side of the loading platform 71.

Since the backrest 4 is raised and lowered by the cylinder 5, the work can be pushed in without the inclusion 90 or an operator for placing the inclusion 90, which is economical. Since the backrest 4 is raised and lowered depending on the cylinder 5, the entire length of the cargo handling vehicle 50 is hardly changed,
There is no reduction in workability or load capacity in the warehouse 80.
Since the backrest 4 is provided so as to be elevated with respect to the carriage 2, the backrest 4 can function as a luggage carrier when not functioning as a backrest body, and it is possible to carry luggage even when there is no pallet nearby. Backrest 4 depending on cylinder 5
Since the backrest 5 and the fork 3 are supported, the luggage can be held between the backrest 5 and the fork 3 and transported.

Although the backrest 4 has a substantially gate shape in the above example, the present invention is not limited to this and, for example, JP-A-59-12.
It may be in the form of a pallet like No. 8200.

[0016]

As described above, according to the present invention, as described above,
The following excellent effects can be obtained. (1) A carriage, a fork, a backrest, and a cylinder are provided. Above all, the backrest is provided so that the carriage can be raised and lowered, and the cylinder for raising the backrest is provided, so that one-sided stacking work can be performed efficiently. it can. (2) Since the backrest is raised down by the cylinder, it is possible to hold and carry luggage between the backrest and the fork.

[Brief description of drawings]

FIG. 1 is a perspective view showing a backrest device of the present invention with the backrest in a vertical position.

FIG. 2 is a view showing a state in which the backrest is in a horizontal position.
Similar to.

FIG. 3 is a side view showing a single-sided double-row loading procedure of a pallet load.

FIG. 4 is a plan view showing a conventional double row loading procedure from both sides.

FIG. 5 is a side view showing a conventional double row loading procedure from one side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Backrest device, 2 ... Carriage, 3, 51 ... Fork, 4 ... Backrest, 5 ... Cylinder, 6 ... Finger bar, 7 ... Lift bracket, 8, 14 ... Side plate, 9 ...
Protrusions, 10 ... Notches, 11 ... Vertical pieces, 12 ... Horizontal pieces, 13
... nail pieces, 15 ... upper plate, 16 ... middle plate, 17 ... vertical plate, 18 ...
Horizontal plate, 19, 22 ... Horizontal axis, 20 ... Blocking plate, 21 ... Bracket, 50 ... Cargo handling vehicle, 52 ... Driver's seat, 60 ... Pallet load, 61 ... Pallet, 62 ... Fork slot vicinity, 70
... trucks, 71 ... loading platform, 80 ... warehouse, 90 ... inclusions.

Claims (1)

[Claims] 1. A carriage, a fork provided on the carriage, a backrest provided on the carriage so as to be elevated from a vertical position to a horizontal position, and a cylinder provided on the carriage for raising and lowering the backrest. A backrest device that features things.