JPS6365594B2 - - Google Patents

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 three types of containers in terms of container length: 20 feet, 35 feet, and 40 feet, and one hanging device is required to handle three types of containers. However, 35-foot containers are a recent phenomenon.

As such a hanging device, a lifting device can be divided into a fixed part and a movable part, such as the telescopic spreader mentioned on page 11 of the collection of well-known and commonly used techniques "Crane" published in the Patent Office Gazette on June 30, 1985. 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 four different lengths of the hanger and to change the length easily and quickly.

[Summary of the invention]

In the present invention, the hanging beam is placed at two predetermined positions between the contracted position and the extended position relative to the main body.
A first and second side stopper is provided, the stopper is movable in the direction of extension and contraction of the hanging beam, and the hanging beam side stopper is capable of protruding toward the main body and contacts the main body side stopper when the stopper is protruded. is installed on a hanging beam.

[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. 1st
The figure shows the main body of the hanger with the front member removed.

In the figure, reference numeral 1 denotes a main body of the hanging tool, and the suspension beams 2a and 2b are expanded and contracted by hydraulic cylinders 3a and 3b. Hanging beams 2a, 2b
slides on a guide (not shown) of the main body 1 to expand and contract. Twist lock pins 4a, 4b are provided at the tips of the hanging beams 2a, 3a. The hydraulic cylinders 3a, 3b can change the hanging beams 2a, 2b from a 19 foot position to a 40 foot position.

In Figures 3 to 5, 10 is the hanging beam 2.
Hydraulic cylinders for stoppers are provided at each of a and 2b, both ends of which are rod type, and are oriented vertically. Stoppers 11 and 12 are respectively attached to the tips of the rods so as to be able to protrude toward the main body 1 side. The stoppers 11, 12 are guided by hanging beams 2a, 2b.

Reference numerals 15 and 16 indicate movement stoppers installed in the main body 1, which are installed at the upper and lower parts of the main body 1, respectively. The moving stopper 15 on the upper side is the hanging beam 2
When a and 2b are at the 35 foot position, they are installed corresponding to the position of the stopper 11 on the hanging beam side. The moving stopper 16 on the lower side is installed to correspond to the position of the stopper 12 on the hanging beam side when the hanging beams 2a, 2b are at the 19 foot position. The moving stoppers 15 and 16 are T-shaped, and the vertical pieces 15a and 16a are connected to the opening 1 of the main body 1.
a, 1b, and its horizontal pieces 15a, 16b are placed on the main body 1. Moving stopper 15, 16
can slide against the main body 1.

17 and 18 are fixed stoppers provided on the main body 1, and fixed seats 17a, 17b, 18a, and 18b determine the sliding distance of the movable stoppers 15 and 16. The center between the fixed seats 17a and 17b corresponds to the state in which the suspension beams 2a and 2b are set at the 35 foot position. The center between the fixed seats 18a and 18b corresponds to the state in which the suspension beams 2a and 2b are set at the 19 foot position. The distance L between the fixed seats 17a and 17b is equal to twice the thickness of the movable stopper 15 in the direction of extension and contraction of the suspension beams 2a and 2b plus the thickness of the stopper 11. Fixed seat 18a-
The distance L between the movable stoppers 18b is twice the thickness of the movable stopper 16 plus the thickness of the stopper 12.

Stoppers 11, 12, moving stoppers 15, 1
6. The fixed seats 17 and 18 have the same configuration, and the movable stopper 16 side is attached in the opposite direction to the movable stopper 15 side. The moving stopper 16 slides on the fixed seat 18.

Moving stoppers 15, 16 and fixed seats 17, 18
are the respective stoppers 1 of the hanging beams 2a and 2b.
1 and 12 are provided on the main body 1.

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.

Container sizes are generally 20 feet, 35 feet, and 40 feet. The purpose of 19 feet is
For example, when a sling is lowered into a cell in a hold containing a 20-foot container, if the sling gets caught on the cell, the sling is retracted to allow the sling to be raised or lowered. . For this reason, the typical range of use is 20 feet to 40 feet.

In Figure 3, A indicates 19 feet, B indicates 20 feet, C indicates 35 feet, and D indicates 40 feet.

The operation of this configuration will be explained.

First, the case where the distance is reduced to 19 feet will be explained. In this case, the hydraulic cylinders 3a, 3b
is in the most contracted state, and the stopper hydraulic cylinder 10 is retracting the stopper 12. The stopper 12 is located on the left side of the moving stopper 16 in the figure.

To set from the 19 foot position to the 20 foot position, the stopper 12 of the stopper hydraulic cylinder 10 is extended, the hydraulic cylinders 3a and 3b are extended, and the suspension beams 2a and 2b are extended. As a result, when the stopper 12 hits the movable stopper 18 and the movable stopper 18 hits the fixed seat 18b,
The suspension beams 2a, 2b stop extending. Since the hydraulic motors of the hydraulic cylinders 3a and 3b continue to operate, the above state continues, and the suspension beam 2
a and 2b will not retreat. Since the hydraulic motor is of a variable type, the flow rate decreases when the hydraulic pressure exceeds a predetermined value, so that operation can be continued. The above fixes it to the 20 foot position.

In order to change the distance from the 20 feet position to 19 feet, the hydraulic cylinders 3a and 3b may be moved backward in the above state. Once the hydraulic cylinders 3a and 3b are compressed to the minimum contraction margin, they cannot be compressed, so
It is fixed at the 19 foot position by the operation of the hydraulic pump.

35 from 19 feet or 20 feet above
To set it at the foot position, operate the stopper hydraulic cylinder 10 to project the stopper 11 and extend the hydraulic cylinders 3a, 3b. When the suspension beams 2a, 2b extend to the vicinity of 35 feet, the stopper 11 hits the movable stopper 15, and the movable stopper 15 hits the fixed seat 17b, setting the suspension at 35 feet. The operation of the hydraulic motors of the hydraulic cylinders 3a and 3b is the same as described above.

To move from the 35-foot position to the 20-foot position, the hydraulic cylinder 10 is operated to project the stopper 12 and the hydraulic cylinders 3a and 3b are retracted. The stopper 12 hits the movable stopper 16, and the movable stopper 16 hits the fixed seat 18a, so that positioning is performed. The operation of the hydraulic motors of the hydraulic cylinders 3a and 3b is the same as described above.

After setting the position from the 20 feet to the 35 feet position, to set the position to the 40 feet position, operate the hydraulic cylinder 10 to move the stopper 11 backward;
Extend the hydraulic cylinders 3a and 3b. Once the hydraulic cylinders 3a, 3b have reached their maximum extension range, they cannot be extended and are therefore fixed at the 40 foot position by the operation of the hydraulic pump.

To move from the 40 foot position to the 35 foot position, protrude the stopper 11 and tighten the hydraulic cylinder 3.
Retract a and 3b. The stopper 11 hits the movable stopper 15, and the movable stopper 15 hits the fixed seat 17.
At point a, the hydraulic cylinder is activated and fixed at the 35 foot position.

As mentioned above, the movement stopper 15, 1 on the main body side
6 moves around the 35-foot position and the 20-foot position to indicate the 35-foot position and the 20-foot position, so the 35-foot position and the 20-foot position can be set from either position with a single operation. .

If the moving stoppers 15 and 16 are fixed to the main body 1 so that they cannot be moved, for example, if it is possible to move from the 40 foot position to the 35 foot position with one operation, then from the 20 foot position to the 35 foot position. To do so, first retract stopper 11 to extend it between 35 feet and 40 feet, then move stopper 11 back.
The suspension beams 2a and 2b must be retracted while the suspension beams 1 are made to protrude.

In the above, when setting the container to the 40-foot position after loading and unloading the container from the 19-foot position to the 20-foot position, the stopper 12 is moved back and the hydraulic cylinder 3
Extend a, 3b, stopper 12 and moving stopper 1
6, it is necessary to project the stopper 12 again. This re-protrusion operation of the stopper 12 is performed after the stopper 12 is disengaged from the movable stopper 16.
This may be done immediately, or the stopper 12 may be re-extended after the suspension beam has stopped moving due to the engagement of the stopper 11 with the moving stopper 15 at the 35-foot position. good. This work can be fully performed by manual operation.

Now, when the hoist is lowered to hang a container in the hold with the container set at the 20-foot position, if the hoist gets caught in the cell and cannot be lowered, the hydraulic cylinders 3a and 3b will lower the hoist. shorten the length of In this case, if the distance has been shortened from 35 feet and set to 20 feet, the stopper 12 must be moved back. For this reason, when retracting the hanging tool, it is preferable to give a retreat command to the hydraulic cylinders 3a and 3b, and also give a command to the hydraulic cylinder 10 to retreat the stopper 12.

Also, the hanging device may be caught in the cell at either 35 feet or 40 feet, and in that case, shorten it. In the case of 35 feet, the stopper 11 is moved back. For 40 feet, use hydraulic cylinder 3a,
It is only necessary to move back 3b. In this case, if the amount of contraction of the hydraulic cylinders 3a, 3b is set using a timer or a limit switch, the original length can be restored immediately when the hanging tool is removed from the cell.

The hydraulic cylinders 10 for the stoppers 11 and 12 are rod-shaped at both ends, and are connected to the suspension beams 2a and 2b.
Since the moving stoppers 15 and 16 are provided on the main body 1 side, the structure can be simplified.

In the case of a hydraulic cylinder having a rod at one end, a link mechanism may be provided between the stoppers 11, 12 and the rod.

The setting of 19 feet and 20 feet may be accomplished by providing stoppers on the main body 1 and the hanging beams 2a, 2b, respectively, and bringing them into contact.

In the embodiment shown in FIG.
1 so that it can rotate freely. According to this, the stopper 20 is supported by the fixed seat 22a and the shaft 21, so that the position is accurate. 23 is a stopper provided on the hydraulic cylinder.

〔Effect of the invention〕

As described above, according to the present invention, four fixed positions can be quickly obtained with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a front view of the telescoping hanging device, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a vertical cross-sectional view of a hanging beam according to an embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of a portion of the moving stopper 15, and FIG. 6 is a longitudinal sectional view of another embodiment of the present invention. 1...Main body, 2a, 2b...Hanging beam, 3
a, 3b, 10...hydraulic cylinder, 11, 12...
...stopper, 15,16...movement stopper, 1
6, 17... Fixed stopper, 20... Moving stopper, 21... Axis, 23... Stopper.

Claims (1)

[Claims] 1. A suspension beam is provided to be extendable and retractable relative to the main body by a driving device, and a first predetermined position between a contracted position and an extended position of the suspension beam relative to the main body;
A first moving stopper and a second moving stopper are respectively provided on the main body at a second predetermined position, and the first moving stopper and the second moving stopper move in the direction of expansion and contraction of the suspension beam around the respective predetermined positions. The first movable stopper and the second movable stopper are provided on opposite sides of each other with respect to the axis of the suspension beam, and a first movable stopper that can contact the first movable stopper is provided on one end side. A second driving device is provided on the hanging beam, and the second driving device includes a stopper and has a second stopper in contact with the second moving stopper on the other end side, and one stopper projects from the hanging beam so as to be engageable with the one moving stopper. 1. A telescoping type hanger characterized in that the other stopper is provided so as to retreat from the other movable stopper when the movable stopper is moved.