JPH0826654A - Spreader - Google Patents

Abstract

PURPOSE:To prevent a container fitting and the upper surface of a container from being damaged by a twist-lock when the container is arrested by a spreader by installing the twist-lock to a spreader main body in such a manner that the twist lock is freely rotated and moved up and down, and concurrently energizing the twist-lock in such a way as to be returned to an initial position by a spring. CONSTITUTION:The piston rod of a hydraulic cylinder 11 installed within a spreader 1 is rotatably supported by the lever of a sleeve 9, so that a twist-lock 3 is rotated closkwise/counterclockwise via the sleeve 9. When a container C is arrested by the spreader 1, as soon as the twist-lock is hit against the corner fitting 13 of the container C, the twist-lock is slid upward against the spring force of a forced return spring 4. Therefore, any damage will never be made to the corner fitting 13. Besides, when the twist-lock 3 comes out of the corner fitting 1 3, and is hit against the upper surface of the container C, no damage is made to the container C.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a spreader for loading and unloading containers.

[0002]

2. Description of the Related Art Conventionally, a twist lock for gripping a container is rotatably attached to the four corners of a spreader, but it is immovable in the vertical direction.

[0003]

Therefore, when the twist lock is misaligned from the holes of the corner metal fittings of the container when the container is grasped by the spreader, the twist locks are attached to the corner metal fittings at the four corners of the container or the top surface of the container. Collisions can damage these components.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent a twist lock from slipping from a hole in a corner metal part of the container when the container is held by a spreader. It is to provide a spreader that does not damage the corner metal fittings at the four corners of the container or the top surface of the container. Another object of the present invention is to provide a spreader in which a fluid cylinder for rotating the twist lock does not move up and down following the twist lock when the twist lock moves up and down.

[0005]

In the spreader of the present invention which achieves the above object, a twist lock is attached to a spreader body so as to be rotatable and movable up and down, and is urged by a spring to be capable of returning to an initial position. It is a feature.

[0006]

[Operation] When you try to grab the container with the spreader, if the twist lock shifts from the hole of the corner metal of the container and hits the corner metal at the four corners of the container or the top of the container, the twist lock resists the spring force of the spring for forced return. And then rise.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a main part of a spreader according to the present invention. A twist lock 3 is rotatably attached to a main body 2 of the spreader 1 and is vertically movable.

The coil spring 4 fitted in the twist lock 3 is supported by a spring receiver 5 attached to the twist lock 3 and a spring receiver 6 abutting against a partition wall 7 in the spreader body 2, and the twist lock 3 is in an initial position. It is designed to return to. On the other hand, a slide key 8 is attached to the twist lock 3, and the twist lock 3 inserted in the sleeve 9 slides in the axial direction. The sleeve 9 is arranged in the upper space 2 a of the main body 2 partitioned by the partition wall 7.

A piston rod 12 of a fluid cylinder 11 mounted in the main body 2 is axially supported by a lever 10 fixed to a sleeve 9, and the twist lock 3 is connected via the sleeve 9 to a timepiece as shown in FIG. It is designed to rotate in the clockwise and counterclockwise directions. In FIG. 1, reference numeral 14 is a nut screwed onto the upper portion of the twist lock 3, and 15 is a washer fitted onto the upper portion of the spreader 3.

As shown in FIG. 3, when the container C is to be gripped by the spreader 1, when the twist lock 3 hits the corner metal piece 13 at the four corners of the container C, the twist lock 3 causes the spring force of the spring 4 for forcible return. Slide upwards against. Therefore, the corner lock 13 is not damaged by the twist lock 3. Further, even when the twist lock 3 comes off the corner metal fitting 13 and collides with the upper surface of the container C, the container C is not damaged.

On the other hand, since the twist lock 3 and the sleeve 9 are slidably engaged by the slide key 8,
The sleeve 9 and the fluid cylinder 11 do not rise following the rise of the twist lock 3. Even when the twist lock 3 returns to the initial position, the sleeve 9 and the fluid cylinder 11 do not follow the descending movement of the twist lock 3. In FIG. 3, reference numeral 16 is a hole of the corner metal piece 13.

[0012]

As described above, according to the present invention, since the twist lock is attached to the spreader main body so as to be rotatable and liftable, and the spring is biased so as to be able to return to the initial position, the spreader tries to grasp the container. when doing,
Even if the twist lock is displaced from the hole of the container corner metal, the twist lock does not damage the corner metal at the four corners of the container or the upper surface of the container.

Further, by attaching a slide key to the twist lock and making the twist lock axially slidable with respect to the sleeve for forcibly rotating the twist lock, when the twist lock moves up and down, The fluid cylinder for rotating the twist lock does not move up and down following the twist lock. Therefore,
There is no need to interpose a universal joint at the joint between the sleeve and the fluid cylinder.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a spreader according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory view of the operation of the spreader according to the present invention.

[Explanation of symbols]

1 Spreader 2 Spreader body 3 Twist lock 5 Spring

Front page continuation (72) Kenichi Fujikawa Inventor Kenichi Fujino 3-1-1 Tamano-shi, Okayama Mitsui Engineering & Ships Co., Ltd. Tamano Plant (72) Inventor Shinji Hara 3-1-1 Tamama-shi, Okayama Prefecture Company Tamano Office

Claims (2)

[Claims] 1. A spreader in which a twist lock is attached to a spreader body so as to be rotatable and movable up and down, and is biased by a spring so as to be capable of returning to an initial position. 2. A twist key is attached to the twist lock,
The spreader according to claim 1, wherein the twist lock is axially slidable with respect to a sleeve for forcibly rotating the twist lock.