JPS60197583A - Extension type hanger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a hoisting device for a crane, and in particular to a telescoping device for a hoisting device for a container crane.

[Background of the invention]

There are 20 types of containers based on the length of the container.
There are three types: foot, 35 feet, and 4o feet, and one hanging device can handle three types of containers. However, 35-foot containers are a recent emergence.

Such a hanging device is divided into a fixed part and a movable part, such as the telescopic spreader on page 11 of the collection of well-known and commonly used techniques "Crane" published in the Patent Office Gazette dated June 30, 1982. The movable parts are expanded and contracted using hydraulic, electric, and other drive sources to correspond to the length of the container.

[Purpose of the invention]

An object of the present invention is to make it possible to obtain three different lengths of the hanger and to change the length easily and quickly.

[Summary of the invention]

The present invention provides a main body side stopper at a predetermined position between a contracted position and an extended position of the hanging beam relative to the main body, and when the hanging beam is at the predetermined position, the main body side stopper A contacting hanging beam side stopper is provided on the hanging beam, one of the main body side stopper and the hanging beam side stopper is provided so as to be movable forward and backward relative to the other stopper side, and the stopper on the other side is set on the hanging beam with the above-mentioned predetermined position as the center. It is movable in the expansion and contraction direction.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A case in which the present invention is applied to a hanging tool for a container crane will be described with reference to an embodiment shown in the drawings. FIG. 1 shows the main body of the hanger with the front member removed.

In the figure, 1 is the main body of the hanging tool, a hanging beam 2a,
2b is configured to expand and contract using hydraulic cylinders 3a and 3b. The suspension beams 2a and 2b extend and contract by sliding on guides (not shown) of the main body l. Twist lock pins 4a, 4b are provided at the ends of the hanging beams 2a, 3a.

Hydraulic cylinders aa and 3b extend and retract hanging beams 2a and 2b from a 20 foot position to a 40 foot position.

In FIGS. 3 and 5, 10 is a hanging beam 2a.

2b are hydraulic cylinders for stoppers provided respectively,
The stopper 10a at the tip of the loft can be made to protrude toward the main body 1 side. Reference numeral 11 denotes a moving stopper on the main body side, which is installed at the position of the stopper 10a on the hanging beam side when the hanging beams 2a and 2b are at the 35-foot position. The moving stopper 11 is T-shaped, and its vertical piece 11a is inserted into the opening 1a of the main body, and its flat piece 11b is placed on the main body 1. The moving stopper 11 can slide relative to the main body l. 15 is a fixed stopper provided on the main body l, and fixed seats 15a and 15b determine the sliding distance of the movable stopper 11. Fixed seat 15a
-15b corresponds to the state in which the hanging beams 2a and 2b are set at 35 feet. Fixed seat 15a
The distance between -15b is twice the thickness of the moving stopper 11 in the direction of expansion and contraction of the hanging beam 2a12b, plus the thickness of the stopper 10a.

The movable stopper 11 and the fixed seats 15a, 15b are provided on the main body l in correspondence with the stoppers lOa, 10a of the suspension beams 2a, 2b, respectively.

Oil is supplied to the hydraulic cylinder 10 by the same means as the oil is supplied from the main body 1 to the twist lock pins 4a, 4b.

In this configuration, in order to increase the distance from the state shown in FIG. 1 to 20 feet, the stopper 10a of the hydraulic cylinder 10 is moved back. In this state, the hydraulic cylinder 3a.

Retract the rod 3b. This allows the hanging beam 2
a and 2b are housed within the main body l. hydraulic cylinder 2a,
The most retracted position of rod 2b is 20 feet. This operation is performed if the position before starting the operation is 40 feet or 3
The same applies to all 5 feet. To reach the 40 foot position, extend the suspension beams 2a, 2b past the stop 10a.

If you want to move from 40 feet to 35 feet,
The hydraulic cylinder 10 is operated to project the stopper 10a. When the suspension beams 3a, 3b are moved backward in this state, the stopper 10a hits the moving stopper 11. As shown in FIG. 3 (when the stopper 11 hits the fixed seat ba, the hanging beams 3a, 3b stop moving backward. Since the hydraulic pump is a barrier pull type, by continuing to operate the hydraulic pump, the hydraulic cylinders 3a, 3b The pressure in the chamber on the rod side increases and the flow rate decreases.For this reason, the hanging beams 2a and 2b
is held by the fixed seat 15a and the pressure of the hydraulic cylinder, so the positions of the hanging beams 3a, 3b are fixed.

On the other hand, in order to move from the 20 feet E to the 35 feet position, with the stopper 10a protruding, the switching valve 18
to make the rods of the hydraulic cylinders 3a and 3b protrude. The stopper 10g hits the moving stopper 11, and the fourth
As shown in the figure, when the stopper 11 comes into contact with the fixed seat 15b, the relief valve 19 operates and is fixed at the 35 feet position.

The suspension beams 2a and 2b are fixed by the hydraulic pump in 2
The same applies to 0 feet and 40 feet.

As mentioned above, the movable stone T+ 11 on the main body side moves around the 35-foot position and indicates the 35-foot position, so it can be set to the 35-foot position from either the 20-foot position or the 40-foot position with one operation. It is possible.

If the movement stopper 11 is fixed to the main body 1 so that it cannot be moved, for example, if it is possible to move from the 20 feet position to the 35 feet position with one operation, then the operation from the 40 feet position to the 35 feet position is possible. , first stopper 1
0a must be retracted to reduce from 40 feet to less than 35 feet, and then stop 10a must be extended to extend the suspension beams 2a, 2b.

Note that the hydraulic cylinder 10 and the stopper 10a may be provided on the main body 1, and the slidable movable stopper 11 and the fixed seats 15a, 15b may be provided on the suspension beams 2a, 2b.

In the embodiment shown in FIG. 6, a movable stopper is rotatably provided on the shaft 21. According to this, since the stopper is supported by the fixed seat 22a and the shaft 21, the position is accurate. n is a stopper provided on the hydraulic cylinder.

[Effects of the Invention] - As explained above, in the present invention, one stopper is movably installed by the stopper on the other side, so that the hanging beam can be moved to the position of this stopper by movement in one direction, regardless of the previous position. can be stopped.

[Brief explanation of the drawing]

FIG. 1 is a front view of the telescopic hanging beam, FIG. 2 is a plan view of FIG. 1, and FIGS. 3 and 4 are longitudinal cross-sections showing the relationship between the hanging beam and the main body of an embodiment of the present invention. FIG. 5 is a sectional view taken along the line A-A in FIG. 3, and FIG. 6 is a vertical sectional view of a main part of another embodiment of the present invention. 1...Main body, 2a, 2b...Hanging beam, 3a. 3b, 10... Hydraulic cylinder, 10a...
...Stopper, 11...Movement stopper, 15.
...Fixed stopper, 15a. 15b... Fixed seat, Nod... Moving stopper, 21... Shaft, 22a, 22b...
・Fixed seat, illusion...stopper size 1 figure

Claims (1)

[Claims] 1. Provide a hanging beam that expands and contracts with respect to the main body by a cylinder device installed in the main body, and provide a stopper on the main body at a predetermined position between the position where the hanging beam is contracted and the extended position with respect to the main body, The suspension beam is provided with a suspension beam side stopper that comes into contact with the main body side stopper when the suspension beam is at the predetermined position, and one of the body side stopper and the suspension beam side stopper is provided so as to be freely movable toward and away from the other stopper side. . A telescoping measuring instrument, characterized in that the stopper on the other side is movable in the direction of expansion and contraction of the suspension beam around the predetermined position.