JPH0133422B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a positioning device for a crane hoist, particularly for a telescopic hoist for a container crane.

[Background of the invention]

There are three types of containers in terms of container length: 20 feet, 35 feet, and 40 feet.One hanging device is required to handle containers of three different lengths. It has become necessary to change the situation.

As a telescopic hanging device, No. 11 of the collection of well-known and commonly used techniques "Crane" in the patent publication issued on June 30, 1981
Like the telescopic spreader shown in Page 2, the lifting device is divided into a fixed part and a movable part, and the movable part is expanded and contracted using a drive source such as hydraulic pressure or electric power to correspond to the length of the container.

In this case, stopping at the maximum length and the minimum length can be automatically facilitated by setting the expansion/contraction margin of the expansion/contraction device. Stopping at intermediate stopping points is achieved by placing a stopper between the fixed part and the moving part. In this case, if the expansion/contraction speed was high, there were cases where it was not possible to stop at an intermediate stopping point.

[Purpose of the invention]

An object of the present invention is to ensure stopping at an intermediate stopping point.

[Summary of the invention]

The present invention provides two fixed stoppers that protrude to the other side at one of the intermediate positions of the fixed beam and the telescopic beam, and the two fixed stoppers are arranged in parallel in a direction perpendicular to the direction of expansion and contraction of the telescopic beam. Slopes of the stoppers are provided facing oppositely to each other in the expansion and contraction direction, and a movable stopper that can engage each of the two fixed stoppers and can move forward and backward independently is provided on the other side, and a drive device for retracting the two movable stoppers. It is characterized by having the following.

[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. Fifth
The figure shows the main body of the hanger with the front member removed.

In FIGS. 5 and 6, reference numeral 1 denotes a fixed beam of a hanging tool, and telescoping beams 2a and 2b are configured to be extended and contracted by hydraulic cylinders 3a and 3b. The telescoping beams 2a and 2b extend and retract by sliding on a guide (not shown) of the fixed beam 1. Telescopic beam 2a,
Twist lock pins 4a and 4b are provided at the tip of 2b. Hydraulic cylinders 3a, 3b extend from the 20 foot position to the 40 foot position with the telescopic beam 2a,
Expand and contract 2b. The hydraulic cylinders 3a and 3b are provided so that pressure is always applied to either the extending side or the contracting side. The hydraulic pump is, for example, of a variable type. Reference numeral 10 denotes a stopper device for fixing the beam at the 35-foot position, and it is set between the fixed beam 1 and the telescopic beams 2a and 2b.

The details of this stopper device 10 will be explained with reference to FIGS. 1 to 4. 11a and 11b are telescopic beams 2
This is a fixed stopper installed on the upper surface of the fixed beam 1 and protrudes toward the fixed beam 1 side. Fixed stopper 11a,
11b has a vertical surface at one end, an inclined surface at the other end, and a flat surface between the two ends. The vertical plane is a movable stopper 12
It becomes a stopper surface for A movable stopper slides on the inclined surface and the flat surface. The two fixed stoppers 11a and 11b are arranged symmetrically in the direction of expansion and contraction of the telescoping beam 2, as shown in FIG. The fixed stoppers 11a and 11b are arranged parallel to each other in a direction perpendicular to the direction of expansion and contraction, as shown in FIGS. 2 and 3. The distance between the two fixed stoppers 11a, 11b in the expansion/contraction direction is determined by the size and arrangement of the movable stopper 12.

The movable stopper 12 is provided on the fixed beam 1 so as to be able to move forward and backward toward the telescopic beam 2. The movable stopper 12 consists of two fixed stoppers 11a, 11
They are provided in parallel so as to correspond to the respective numbers b.
The other ends of the movable stoppers 12a and 12b pass through a support frame 15 fixed to the fixed beam 1. The movable stoppers 12a, 12b are urged downward by springs 16a, 16b arranged between them and the support frame 15. The support frame 15 is the fixed seat 1
7 with bolts 18. A cylinder 20 is attached to the fixed beam 1 for lifting the movable stoppers 12a and 12b upward. The rod side of the cylinder 20 protrudes through the support frame 15 and is fixed to the transverse beam 21. The other end side of the movable stoppers 12a and 12b is a horizontal beam 21.
protrudes through the end of the nut 23a,
23b is installed.

The operation of such a configuration will be explained.

Now, in Figures 1 and 3, the left side is the 40 foot side and the right side is the 20 foot side.

Now, to explain the case where the length is changed from 40 feet to 35 feet, the cylinder 20 is assumed to be in a non-operating state. Therefore, movable stoppers 12a, 12b
protrudes toward the telescopic beam 2. In this state, the hydraulic cylinders 3a and 3b are retracted, and when the distance reaches approximately 35 feet, the movable stopper 12b rides on the fixed stopper 11b and moves backward. However, the movable stopper 12a remains protruded. Therefore, when the distance reaches 35 feet, the movable stopper 12a becomes the fixed stopper 1.
It hits the vertical plane of 1a and is fixed at 35 feet.
The movable stopper 12b protrudes over the fixed stopper 11b. Hydraulic pressure continues to be applied to the hydraulic cylinders 3a and 3b in the direction of contraction.

In this way, one fixed stopper 12a contacts the fixed stopper while remaining protruded, so that even if the operating speed of the hydraulic cylinders 3a and 3b is high, the fixed stopper 12a can be reliably fixed at 35 feet.

When returning from this state to 40 feet or reducing it to 25 feet, the hydraulic cylinders 3a and 3b are operated while the cylinder 20 is operated.
Once the cylinder 20 has passed close to 35 feet (that is, once the movable stops 12a, 12b have passed between the fixed stops 11a, 11b), it returns to its original position.

When the rod of the cylinder 20 is extended, the horizontal beam 21
contacts the nuts 23a, 23b and lifts the movable stoppers 12a, 12b. Movable stopper 12
a, 12b are retracted to a position where they do not contact the fixed stoppers 11a, 11b.

If you want to go from 40 feet to 20 feet immediately, you can operate the cylinder 20 to lift the movable stopper while passing near 35 feet.

When increasing the length from 20 feet to 35 feet, the stopper is a combination of the movable stopper 12b and the fixed stopper 11b.

In this way, one movable stopper touches the fixed stopper in a protruding state, so that even if the telescopic beam moves at a high speed, it can be stopped reliably. It also allows accurate positioning up to 35 feet.

If the movable stopper is inserted into the recess to stop the beam, it may not be possible to stop the beam if the moving speed of the telescopic beam is fast. Further, the width of the recess in the direction of movement must be larger than the width of the movable stopper, and if this is done, 35 feet cannot be determined accurately.

Furthermore, since the movable stopper is moved backward by sliding the upper surfaces of the fixed stoppers 11a and 11b, the cylinders 20 can be integrated into one. By providing two independently movable cylinders 20, the inclined surfaces of the fixed stoppers 11a and 11b can be eliminated.

The fixed stoppers 11a, 11b may be provided completely in parallel. In this case, the movable stopper 12a, 1
2b is the fixed stopper 11a, 11b of the above embodiment.
It is provided obliquely to the direction of expansion and contraction of the expansion and contraction beam 2, as shown in FIG.

When fixing to 35 feet, the movable stopper 12b and fixed stopper 11b can be made unnecessary by always retracting from the 40 feet side. Further, the inclined surface of the fixed stopper 11a can also be made unnecessary. In this case, it is preferable to use the cylinder rod as a movable stopper. In this case, to extend from 20 feet to 35 feet, first extend to 35 feet or more, and then retract with the movable stopper 12a protruding.

The means for retracting the movable stops 12a, 12b may be an electrically driven device. Further, a link mechanism may be provided between the drive device and the transverse beam.

Movable stoppers 12a and 12b are fixed stoppers 1
If wear caused by sliding on the upper surfaces of 1a and 11b becomes a problem, move the movable stoppers 12a and 12b.
A roller is provided at the tip.

This invention can also be applied to positioning in four stages: 40 feet, 35 feet, 20 feet, and 19 feet. The purpose of the 19-foot is, for example, when lowering a sling into a cell in a hold that stores a 20-foot container, and if the sling gets caught in the cell, the sling can be retracted to raise or lower the sling. It's there to make it possible to descend. For this reason, the typical range of use is 20 feet to 40 feet.

FIG. 4 shows the case where the distance is set to 20 feet, and 11a and 11b are fixed stoppers for 35 feet, and 25a and 25b are fixed stoppers for 20 feet. A, B, C, and D in the figure are the positions of 40 feet, 35 feet, 20 feet, and 19 feet at the end of the telescopic beam.

〔Effect of the invention〕

As described above, the present invention provides substantially two sets of positioning means consisting of a fixed stopper and a movable stopper, and the movable stoppers of one set are installed facing in the opposite direction to the movable stoppers of the other set. Even if the telescopic beam is moved from any direction and even if the moving speed of the telescopic beam is high, it can be stopped reliably and at an accurate position.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a stopper device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. FIG. 5 is a longitudinal sectional view of a hanging tool according to an embodiment of the present invention, FIG. 5 is a front view of the hanging tool according to an embodiment of the present invention, and FIG. 6 is a plan view of FIG. DESCRIPTION OF SYMBOLS 1... Fixed beam, 2, 2a, 2b... Telescopic beam, 3a, 3b... Hydraulic cylinder, 10... Stopper device, 11a, 11b, 25a, 25b...
...Fixed stopper, 12, 12a, 12b...Movable stopper, 15...Support frame, 16a, 16
b...Spring, 20...Cylinder, 21...Horizontal beam, 23a, 23b...Nut.

Claims (1)

[Scope of Claims] 1. In a telescoping hanging device provided with a telescoping beam that expands and contracts with respect to a fixed beam, the telescoping beam is fixed at a predetermined position between a contracted position and an extended position with respect to the fixed beam. Two fixed stoppers are provided on one side of the beam and the telescoping beam protruding to the other side, and the two fixed stoppers are arranged in parallel in a direction perpendicular to the direction of expansion and contraction of the telescoping beam,
Furthermore, the shape of the two fixed stoppers consists of a first surface that touches the movable stopper to prevent the telescopic beam from moving, and a slope on which the movable stopper rides when the telescopic beam moves. Slopes are provided facing oppositely to each other in the expansion/contraction direction, and the other of the fixed beam and the telescopic beam is biased toward the one side, and is engageable with the two fixed stoppers and can move forward and backward independently. 1. A stopper device for a telescoping hanger, characterized in that two movable stoppers are provided, and the other is provided with a drive device for retracting the two movable stoppers.