JP2555416Y2 - Overhead traveling crane - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a girder which travels in the front-rear direction and a club which traverses in the left-right direction is provided, and a crane operation is performed by manually operating a push button operation box which is hung below the girder. Related to overhead cranes.

[0002]

2. Description of the Related Art Overhead cranes of this type are generally classified into those in which a push-button operation box is suspended and supported by a club and those in which a push-button operation box is suspended and supported by a girder. In the former, the operation box is directly suspended and supported by the club (hereinafter, referred to as a "first conventional crane"), and a revolving arm is provided in the club, and the operation box is suspended and supported at the end of this arm. (Hereinafter referred to as “second conventional crane”). In the latter, an operation box is suspended and supported at a predetermined position on a girder (hereinafter, referred to as a "third conventional crane"), and a movable body movable in the transverse direction of the club is provided. There is a type in which a push button operation box is suspended and supported (hereinafter, referred to as a "fourth conventional crane").

[0003]

However, these conventional cranes have both advantages and disadvantages in terms of safety measures and cargo handling work, and are insufficient for safely and easily carrying out cargo handling work.

That is, in the first conventional crane, the operation box follows the club, so that the operation box is always located immediately below the club. Therefore, the operator can operate the operation box immediately near the suspended load, and the status of the suspended load can be easily checked. However, since there is a suspended load in the immediate vicinity of the worker, when the suspended load is moved up and down and transferred, there is a danger that the suspended load may be touched. In particular, when the suspended load is transferred through a safe passage when the suspended load is transferred by the girder running, the operator is required to use the ground equipment (e.g., various installations such as machines, tools placed on the ground, and the ground). In addition to being unable to walk on a safety passage where there is no unevenness, and being often distracted by suspended loads, there is a risk that the operator may trip over or collide with ground equipment. .
Conversely, when the operator transfers the suspended load so as to walk on the safety passage, the suspended load passes immediately near or directly above another worker who walks on the safety passage, which is extremely dangerous for such a pedestrian.

[0005] In the second conventional crane, the position of the operation box can be changed to some extent within the range of rotation of the revolving arm with respect to the club, but the above danger cannot be avoided at all.

On the other hand, in the third conventional crane, the hanging fulcrum of the operation box is set at the girder portion on the safety passage so that the operator can walk on the safety passage regardless of the position of the suspended load and at a safe place. The operation box can be operated. Also,
Since the suspended load can be transferred at a position distant from the worker walking on the safety passage, there is no danger to the pedestrian. However, since it is often necessary for the operator to operate the operation box at a position away from the suspended load, it is extremely difficult to check the status of the suspended load, and there is a problem in cargo handling work.

On the other hand, in the fourth conventional crane, the position of the operation box can be freely changed within the traversing range of the club, so that there is no problem as in each of the above cranes. However, since it is necessary to change the operation box position artificially,
The operation of changing the operation box position is extremely troublesome, and may involve danger. In other words, the operation of changing the position of the operation box is such that the operator moves the moving body, which is a suspension fulcrum, by holding the operation box. The operation of moving such a moving body is not easy because the cable for connection is connected, and it requires considerable labor. In addition, when performing the moving operation of the moving body, the operator often walks outside the safety passage, and the operator tends to look up at the moving body, and the feet are inevitably neglected. Risk stumbling or colliding with ground equipment.

The present invention has been made in view of such circumstances, and provides an overhead crane which can safely and easily operate a push button operation box at an optimum position with respect to a suspended load. is there.

[0009]

In order to achieve the above object, the overhead crane of the present invention has a first and a second movable cranes which are movable in a path extending in the left-right direction in parallel with the girder. A moving body is provided, the first moving body is connected to the club so as to be able to follow the club, and the push button operation box is suspended and supported by the second moving body, and the two moving bodies are brought close to each other by operating the push button operation box. It is proposed to interpose a moving body connecting mechanism that is operated so as to be integrally movable in a state.

[0010]

When the club is traversed by operating the push button operation box so that the first moving body is located at the second moving body position, and the moving body coupling mechanism is operated, the two moving bodies can move together. Be linked. When the club is traversed in this state, the operation box is moved to follow the club, and the position of the operation box can be automatically changed. Further, when the push button operation box is positioned at a desired position by traversing the club and the operation box is operated to release the connection between the two moving bodies by the moving body connecting mechanism, only the club is moved without moving the operation box. Can be rampant.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be specifically described below with reference to the embodiments shown in FIGS.

In the overhead crane shown in FIG. 1, reference numeral 1 denotes a girder traveling in the front-rear direction, 2 denotes a club supported on the girder 1 so as to be able to traverse in the left-right direction, and 3 denotes girder 1 and club 2.
Is a push-button operation box for remote-controlled by wire. In the following description, front and rear mean left and right in FIG. 3, and left and right mean left and right in FIG. 1, respectively.

As shown in FIGS. 1 to 5, first and second guide rails 4 and 5 are attached to the front surface of the girder 1 so as to extend in the left-right direction adjacent to the front-rear direction. That is, as shown in FIGS. 3 and 4, a long bracket 6 extending in the left-right direction protrudes from the front surface of the girder 1, and both guide rails 4, 5 are attached to the lower surface of the bracket 6. .

As shown in FIGS. 3 to 5, a first movable body 7 is supported on the first guide rail 4 so as to be able to travel. That is, the first moving body 7 includes a wheeled carrier 8 supported on the rail 4 so as to be able to run freely, a plate-shaped support portion 9 hanging and connected to the carrier 8, and a cylindrical shape attached to the front surface of the main body 9. It comprises a holding unit 10, a rectangular plate-shaped suction unit 11 fixed to the front surface of the holding unit 10, and a balancer 12 attached to the rear surface of the main unit 9. As shown in FIG.
And, as shown in FIG.
An electromagnet 13 constituting a part of the moving body coupling mechanism is provided. The electromagnet 13 is turned on and off by operating the push button operation box 3. Suction unit 11
Is made of a magnetic metal that functions as an attraction surface when the electromagnet 13 is turned on, and is parallel to the moving path 4 of the moving body 7.

As shown in FIGS. 3 and 4, the first moving body 7 is connected to the club 2 via a substantially U-shaped connecting rod 14 and a short chain 15 arranged so as not to interfere with the girder 1. ing. That is, one end of the connecting rod 14 is fixed to the club 2 and the other end of the connecting rod 14 is connected to the main body 9 of the moving body 7 by the chain 15 so that the moving body 7 moves right and left as the club 2 moves. It is adapted to follow the direction.

As shown in FIGS. 1 to 4, a second moving body 16 and a plurality of cable hangers 17 are provided on the second guide rail.
Are supported so that they can run freely. That is, the second mobile unit 1
Reference numeral 6 denotes a wheeled carrier 18 movably supported by the rail 5, a bottomed cylindrical main body 19 vertically connected to the carrier 18, and a cylindrical shape fitted and supported in the main body 19 so as to be movable back and forth. A rectangular plate-shaped to-be-attached portion 21 fixed to the rear end of the cylindrical portion 20 and forming a moving body coupling mechanism in cooperation with the electromagnet 13; A screw rod 22 penetrating through the bottom of the main body 19, nuts 23, 23 screwed to the screw rod 22, and a spring 24 that is inserted into the screw rod 22 and urges the sucked portion 21 backward. And a strip-shaped connecting portion 25 for connecting between the carrier 18 and the carrier 28 of the cable hanger 17 adjacent to the moving body 16 for moving the first moving body 7 in the same region in the left-right direction. It is configured to be movable on a path 5 that is close to and parallel to the path 4. The to-be-adsorbed part 21 is a moving path 5 of the moving body 16.
When the vehicle travels relatively in an area where the suction unit 11 does not exist, the magnetic metal is biased and held slightly backward from the passage of the suction unit 11 (see FIG. 6A).
When the vehicle relatively travels in the area where the suction unit 11 is present, the suction unit 11 is displaced forward against the spring 24 and comes into pressure contact with the suction unit 11 (FIG. 2B).
(C)). Note that the left and right end portions 11a, 1
1a and the left and right end portions 21a, 21a of the sucked object 21 are shown in FIG.
As shown in the figure, the portions 11 and 21 are slightly bent in opposite directions to facilitate the relative passage.

The push button operation box 3 is suspended and supported by a wire rope 26 at the connecting portion 25 of the second moving body 16 as shown in FIG.

As shown in FIGS. 1 and 2, each cable hanger 17 comprises a wheeled carrier 28 supported on the rail 5 so as to be able to run, and a hanger body 29 suspended from the carrier 28. The cables 27 are fixed to the hanger bodies 29 at regular intervals.
And the cable 27 follow the movement of the cable.

In the overhead crane constructed as described above, the push button operation box 3 moves the club 2 and the electromagnet 1
By turning on and off the operation box 3, the operation box 3 can be automatically moved and held at an arbitrary position.

That is, when performing the hanging operation, first, the club 2 is traversed, the first moving body 7 is moved to the position of the second moving body 16, and the electromagnet 13 is turned on. The adsorbed portion 21 of the second moving body 16 is adsorbed to the adsorbing section 11 of the first moving body 7 functioning as an adsorbing surface,
The two moving bodies 7 and 16 are connected (FIG. 6). At this time, the to-be-sucked portion 21 is pressed against the attraction portion 11 by the spring 24, so that the two portions 11, 24 are reliably sucked.

In this state, when the club 2 is traversed to a desired hanging operation position, the operation box 3 is automatically moved to the hanging operation position following the movement. At this time, the ground equipment may be present on the walking path of the operator, but in such a case, the operator can only pay attention to his / her feet because the operator merely walks according to the movement of the operation box 3. No stumbling or collision with ground equipment. Of course, no effort is required to move the operation box 3.

Therefore, as in the case of the first and second conventional cranes, the hanging operation can be performed in the immediate vicinity of the suspended load, and the status of the suspended load can be easily and accurately checked. That is, the work can be performed at an optimum position with respect to the suspended load.

In the case where it is dangerous to operate in the immediate vicinity of the suspended load, the operation box 3 is first moved by traversing the club 3.
Is moved to an appropriate position outside the danger area and the position of the suspended load can be easily checked, and the electromagnet 13 is turned off to release the connection between the two moving bodies 7 and 16, and the operation box 3 is moved. Hold in the above position. Thereafter, the club 3 is moved to a predetermined hanging operation position. In this way, it is possible to operate in a safety area at a certain distance from the suspended load.

When the hanging operation is completed, the club 3 is once traversed, and the operation box 3 is moved on the safety passage. The traversing of the club 3 is, as described above, the operation box 3
Is located far from the suspended load, the club 3
The moving bodies 7 and 16 are moved by
Is performed again after connecting. Then, the electromagnet 13 is turned off to release the connection between the two moving bodies 7 and 16, and the club 3 is traversed to an appropriate place outside the safety passage. Thereafter, the girder 1 is run to transfer the suspended load. At this time, the operator can walk on the safety passage, and the suspended load passes outside the safety passage, so that there is no danger to the operator walking on the safety passage and other pedestrians.

Then, both the moving bodies 7 and 16 are connected by traversing the club 3 and turning on the electromagnet 13, and then the club 3 is traversed so that the suspended load is located at a predetermined hanging place and the hanging work is performed. I do. Also in this case, by performing the same operation as in the hanging operation, the hanging operation can be performed safely while the status of the suspended load is easily and accurately checked.

As described above, the overhead crane according to the present invention has all the advantages of the first to fourth conventional cranes described above, but does not have any of those disadvantages.
The cargo handling work can be performed safely and well.

The present invention is not limited to the above embodiment,
Modifications and improvements can be made as appropriate without departing from the basic principle of the present invention. For example, contrary to the above-described embodiment, the electromagnet 13 may be provided on the second moving body 16 and the attracted portion 21 may be provided on the first moving body 7. Also, the moving bodies 7, 16 and their supporting means, and each moving body 7, 16
The configuration of the connecting means and the like between the club 2 and the operation box 3 is also optional. Further, in the above embodiment, the moving body connecting mechanism interposed between the moving bodies 7 and 16 is provided with the electromagnet 13
And the other movable body is provided with the attracted portion 21 capable of being attracted to the electromagnet 13. However, the movable body coupling mechanism operates the operation box 3 when the movable bodies 7 and 16 are in the proximity state. The moving bodies 7 and 16 are connected by the operation of
Any configuration can be used as long as it can be released, and its configuration is arbitrary.
For example, an engaging recess is provided on one moving body, and a detachable engaging projection is provided on the engaging recess on the other moving body, and the engaging / disengaging driving means of the engaging projection is operated by the operation box 3. It may be configured as follows.

[0028]

As is clear from the above description, according to the present invention, the operation box can be operated by traversing the club with the push button operation box and connecting and releasing the two moving bodies by the moving body connecting mechanism. Can be automatically moved to an arbitrary position, so that all the problems in the first to fourth conventional cranes described above can be eliminated, and the cargo handling operation can be performed safely and satisfactorily.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of an overhead crane according to the present invention.

FIG. 2 is an enlarged detail view showing a main part of FIG. 1;

FIG. 3 is a vertical sectional side view taken along line III-III of FIG. 1;

FIG. 4 is an enlarged detail view showing a main part of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Girder, 2 ... Club, 3 ... Push button operation box, 7 ... 1st moving body, 11 ... Adsorption part, 13 ... Electromagnet (moving body connection mechanism), 14 ... Connecting rod, 15 ... Chain, 16 ... 2nd movement Body, 1
7: Cable hanger, 21: attracted portion (moving body coupling mechanism), 26: wire rope, 27: current collecting cable.

Claims (1)

(57) [Scope of request for utility model registration] 1. An overhead crane configured to perform a crane operation by providing a girder running in the front-rear direction with a club traversing in the left-right direction and manually operating a push-button operation box hung below the girder. First and second movable parts on a path extending in the left-right direction in parallel with the girder.
A moving body is provided, the first moving body is connected to the club so as to follow the club, and the second moving body is supported by suspending the push button operation box,
An overhead crane having a moving body connecting mechanism interposed between the two moving bodies so as to integrally move the two moving bodies in a proximity state by operating a push button operation box.