JP3141616B2 - Container spreader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container spreader used for loading and unloading containers.

[0002]

2. Description of the Related Art As conventional general container spreaders, a power lift type shown in FIGS. 4 and 5 and a wing type shown in FIGS. 6 and 7 are known. The power lift type container spreader includes a frame 25 mounted via a shaft 24 to a lift bracket 23 that can move up and down along a mast 22 of a forklift 21. A telescoping strut 26 that can expand and contract in the up-down direction is erected on the upper left and right ends of the frame 25, and a rail holder 27 horizontally disposed above the frame 25 is pivotally supported at the upper end of the telescoping strut 26. . And rail holder 2
7 is a telescopic strut 2 by right and left swing cylinders 28.
6 and both swing cylinders 2
8 can be inclined left and right by changing the expansion / contraction stroke. A telescopic rail 29 is slidably fitted in the rail holder 27, and a twist lock pin 30 is provided at the tip of the telescopic rail 29 so as to be disengageable from an engaging hole provided in a top corner of the container C. ing.

The above-described power lift type container spreader has a configuration in which the rail holder 27 can be tilted left and right by changing the stroke of the left and right swing cylinders 4. Therefore, the container can be tilted by tilting the trailer or the ground. In addition to being adaptable to the operation when the container is inclined, the container can be forcibly inclined for cleaning or maintenance.

On the other hand, in a wing type container spreader, a frame 25 is mounted on a lift bracket 23 which can be moved up and down along a mast 22 of a forklift 21.
The left and right telescopic rails 29 are fitted into the frame 25 so as to be extendable and contractible in the horizontal direction.
At the end of each of the telescopic rails 29, a twist lock column 31 is erected upward, and a twist lock pin capable of being disengaged from an engagement hole of a top corner of the container C is provided above the twist lock column 31. 30 is provided.

Therefore, in the case of a wing type container spreader, the twist lock pin 30 is connected to the forklift 2
1) It is easy to see from the driver's seat, and the container C can be prevented from swaying because the lower front surfaces of the left and right twist lock columns 31 support the left and right corners of the container C, which are secured in strength when the container is unloaded. It has the features of

[0006]

However, the conventional container spreader described above has the following problems. That is, in the case of the former power lift type container spreader, as shown in FIG. 5, the telescopic rail 29 exists on the line of sight when the twist lock pin 30 is viewed from the driver's seat. In addition to the problem that the positioning of the pins 30 is troublesome, there is also a problem that since the frame 25 supports the lower center portion of the container C, the container C tends to sway in the front-rear direction during transportation. Further, in the case of the latter wing type container spreader, since there is no mechanism for forcibly tilting the apparatus, it has not been possible to meet a demand for forcibly tilting the container for cleaning or maintenance.

In view of the above problems, the present invention provides a container having good visibility of the twist lock pin, capable of stably transporting the container, and forcibly tilting the container as required. Providing a spreader is a technical problem to be solved.

[0008]

Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, the container spreader according to the first aspect of the present invention includes a frame mounted on a lift bracket that can be moved up and down along a mast of a forklift, and a left and right that are erected on both sides of the frame and extendable and retractable by a swing cylinder. A telescopic strut, a rail holder horizontally disposed above the frame, right and left side portions supported by upper ends of the left and right telescopic struts, and a rail holder which can be tilted by a change in a telescopic stroke of both telescopic struts; Left and right telescopic rails slidably fitted to each other, right and left twist-lock struts that have a substantially middle portion fixed to the end of each telescopic rail and stand upright, and twist locks installed at the upper end of each twist-lock strut. It is characterized by having a pin.

According to a second aspect of the present invention, there is provided a container spreader comprising: a frame mounted on a lift bracket which can be moved up and down along a mast of a forklift; And a rail holder which is horizontally disposed below the frame and has both left and right sides supported by the lower ends of the left and right telescopic struts and which can be inclined by changing the telescopic stroke of the telescopic struts. The left and right telescopic rails slidably fitted to the holder, the left and right twist lock columns that are fixed upright at the ends of the respective telescopic rails, and the twist lock and pin installed at the upper end of each twist lock column. It is characterized by having.

[0010]

In the container spreader according to the first aspect of the present invention and the container spreader according to the second aspect of the present invention, the twist lock columns are erected at the ends of the left and right telescopic rails. Since the twist lock pin is provided on the driver's seat, when the twist lock pin is viewed from the driver's seat, there is no member that blocks the twist lock pin on the line of sight, and therefore, the positioning of the twist lock pin with respect to the engagement hole of the container becomes easy. . In addition, the twist lock pins support the top left and right corners of the container, and the twist lock posts support the left and right corners of the container. Shaking is prevented. Furthermore, when the container is inclined or the mounting surface is inclined due to the inclination of the trailer, the inclination of the ground, or the like, the left and right swing cylinders are operated to change the stroke of the left and right telescopic struts, thereby changing the rail holder. The container can be inclined to conform to the inclination of the container or the mounting surface, and the container can be forcibly inclined for cleaning or maintenance.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. First, the first embodiment based on FIG. 1 and FIG.
Will be described. In the container spreader according to this embodiment, the frame 5 is disposed on the lower side,
The rail holder 7 is arranged on the upper side. The frame 5 is mainly composed of upper and lower horizontal frames arranged at predetermined intervals in the vertical direction.
Is mounted via a shaft 4 on a lift bracket 3 that moves up and down along the mast 2 so as to be capable of side shifting.

At the left and right ends of the frame 5, telescopic columns 6 for vertically moving the rail holder are provided. The telescopic strut 6 includes a column guide 6a having a rectangular cross section fixed to an end surface of a horizontal frame of the frame 5 so as to also serve as a vertical frame of the frame 5, and a slide column 6 which is vertically movably fitted into the column guide 6a.
b. The rail holder 7 horizontally disposed above the frame 5 is rotatably connected to the upper ends of the left and right slide columns 6b at the right and left ends thereof via brackets 8 via pins 9 respectively. I have.

A swing cylinder 10 is vertically arranged outside the telescopic strut 6, and the lower end of the swing cylinder 10 is attached to a strut guide 6 b of the telescopic strut 6 via a bracket 11 through a pin 12. The upper end of the piston rod is rotatably attached to the bracket 8 of the rail holder 7 by a pin 13. That is, the rail holder 7 can be moved up and down together with the slide column 6b by the expansion and contraction operation of the left and right swing cylinders 10, and can be tilted left and right by changing the stroke of the left and right swing cylinders 10.

The rail holder 7 is formed of a hollow cylindrical body having a rectangular cross section, and left and right telescopic rails 14 which are slid by a reach cylinder (not shown) are fitted into the rail holder 7 so as to correspond to a container size to be handled. Have been. Thus, twist lock columns 15 are provided upright at the ends of the left and right telescopic rails 14, respectively. The left and right twist lock posts 15 have substantially middle abdomen at the telescopic rails 14.
A twist lock pin 16 is provided at the upper portion of the twist lock pin 16 and can be disengaged from the engagement hole of the container C.
Note that the upper position of the twist lock support 15 only needs to be set to be slightly higher than the upper surface of the telescopic rail 14, and it is not necessary to set the position higher in the dark.

In the container spreader of this embodiment configured as described above, when the twist lock pin 16 is viewed from the driver's seat in order to align the twist lock pin 16 with the engagement hole of the container C to be unloaded. Since there is no member obstructing the line of sight, the position of the twist lock pin 16 can be confirmed and the positioning and insertion operations with respect to the engagement hole can be performed.

When the container C is inclined due to the inclination of the trailer or the ground, or when the container C is lowered on the inclined mounting surface, the left and right swing cylinders 10 are appropriately extended and retracted to operate the slide support. The rail holder 7 can be inclined via 6b to correspond to the inclination of the container C or the mounting surface. Therefore, the container C can be smoothly lifted and lowered. further,
The tilting action of the rail holder 7 is not limited to the cargo handling work of the container C, but is also performed when the container C is tilted for cleaning or maintenance.

Further, at the time of loading and unloading the container, the left and right top corners of the container C are supported by the twist lock pins 16 and the left and right corners of the container C are supported by the lower front surface of the twist lock column 15, so that the front and rear of the container C during transportation are A stable posture can be maintained by preventing the swing of the direction.

Incidentally, a load in the forward falling direction acts on the twist lock support 15 when the container is unloaded. This load becomes very large when the twist lock column 31 stands upright from the end of the telescopic rail 29 as in the conventional wing type shown in FIG. In this embodiment, in which the twist lock column 15 is fixed to the telescopic rail 14 at the middle portion thereof, the number is reduced to about half. Therefore, the twist lock support 15 and the telescopic rail 14 can be reduced in size as compared with the wing type container spreader.

In addition, when a container is unloaded, if one of the left and right twist lock pins 16 is not sufficiently engaged with the engagement hole and lifted up due to an erroneous operation, the wing type container spreader may be used. There is a possibility that the upper part of the joint on the combined side may fall significantly forward, but if the middle part of the twist lock pillar 15 is supported by the telescopic rail 14 as in this embodiment,
The telescopic rail 14 hits the container C when the twist lock support 15 has fallen somewhat forward, so that the twist lock support 15 can be prevented from further falling down.

Next, a second embodiment of the present invention will be described with reference to FIG. The container spreader according to this embodiment has a configuration in which the positional relationship between the frame 5 and the rail holder 7 in the first embodiment described above is reversed, that is, the frame 5 is disposed on the upper side and the rail holder 7 is disposed on the lower side. Configuration. Correspondingly, telescopic struts 6 and swing cylinders 10 are provided at both left and right ends of the frame 5 so as to expand and contract downward, so that the rail holder 7 can move up and down and tilt. Since the support structure of the rail holder 7 by the telescopic strut 6 and the swing cylinder 10 is substantially the same as that of the first embodiment,
The same reference numerals are given and the description is omitted.

Left and right telescopic rails 14 are slidably fitted to the rail holder 7, and a twist lock column 15 having a twist lock pin 16 at the upper end is provided at the end of each telescopic rail 14. It is erected in a fixed state.

Therefore, in the case of the container spreader of the second embodiment configured as described above, the visibility of the twist lock pin 16 is good, and the container or the mounting surface is similar to the case of the first embodiment. Container handling corresponding to the inclination can be performed, and cleaning and maintenance work can be performed by forcibly tilting the container, and further, effects such as prevention of shaking during transport of the container can be obtained.

[0023]

As described in detail above, according to the present invention,
The disadvantages of the conventional power lift type container spreader and wing type container spreader can be solved, and the safety at the time of loading and unloading the container can be improved, and the work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a container spreader according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the container spreader mounted on the forklift.

FIG. 3 is a front view of a container spreader according to Embodiment 2 of the present invention.

FIG. 4 is a front view of a conventional power lift type container spreader.

FIG. 5 is a side view of the container spreader mounted on the forklift.

FIG. 6 is a front view of a conventional wing type container spreader.

FIG. 7 is a side view of the container spreader mounted on the forklift.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Forklift 2 ... Mast 3 ... Lift bracket 5 ... Frame 6 ... Telescopic support 7 ... Rail holder 10 ... Swing cylinder 14 ... Telescopic rail 15 ... Twist lock support 16 ... Twist lock pin

Claims (2)

(57) [Claims] 1. A frame mounted on a lift bracket that can move up and down along a mast of a forklift, and left and right telescopic struts installed on both sides of the frame and operable to expand and contract upward by a swing cylinder.
A rail holder that is horizontally disposed above the frame and has left and right sides supported by upper ends of the left and right telescopic struts, and a rail holder that can be inclined by changing the telescopic stroke of the two telescopic struts, and slides on the rail holder. It comprises left and right telescopic rails fitted as possible, left and right twist lock posts that are fixed upright at the ends of the telescopic rails with substantially middle portions fixed, and twist lock pins installed at the upper end of each twist lock post. Container spreader. 2. A frame mounted on a lift bracket that can be moved up and down along a mast of a forklift, and left and right telescopic columns that are installed on both sides of the frame and that can be extended and retracted downward by a swing cylinder.
A rail holder that is horizontally arranged below the frame and has both left and right sides supported by lower ends of the left and right telescopic struts, and a rail holder that can be inclined by changing the telescopic stroke of both telescopic struts, and slides on the rail holder. A container comprising left and right telescopic rails fitted so as to be able to fit together, left and right twist lock columns which are fixed upright at the ends of the telescopic rails, and a twist lock pin installed at the upper end of each twist lock column. Spreader.