JPH07215662A - Boom fixing device for container crane - Google Patents

Abstract

PURPOSE:To eliminate the work at a high lift by a worker at the time of standing a boom for fixation. CONSTITUTION:A hook lever 18 is provided on a supporting frame 17, which is projected from a top steel skeleton 12, freely to be turned in the vertical direction, and a locking pin 24 of a boom 9 side is locked with a hook part 18a of the tip of the lever 18 to constrain the movement of the boom 9 of the fall side. A receiving fixture 32 is fixed to the tip of the supporting frame 17. A boom stopper 33 to be turned by the operation of an actuator is provided at a required position on the top surface of the boom 9. A stopper receiving member 38, on which the boom stopper 33 is placed and held in the downward attitude, is fitted to the boom 9. The boom stopper 33 abuts on the receiving fixture 32 to stop the swing of the boom 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom fixing device for a container crane used when landing or loading a container between a container ship laterally attached to a quay and a land.

[0002]

2. Description of the Related Art A container crane for loading and unloading a container has a front leg 2, a rear leg 3, and a connecting member 4 as shown in FIG.
The container crane body frame 1 consisting of
A girder 8 is movably arranged on a rail 7 laid on the ground, and a girder 8 horizontally extending rearward to be the land side A is fixed to the upper end of the main body frame 1, and a front end of the girder 8 is fixed to the girder 8. , The base end of the boom 9 which extends horizontally toward the sea side B is connected by a hinge 5 so that it can be undulated, and the trolley 10 can be moved between the girder 8 and the boom 9. The container 11 can be unloaded between the land side A and the sea side B.

In the case of the above-mentioned container crane, when the cargo handling work is not performed, the boom 9 is fulcrumed at the connecting point of the tips of the girders 8 as indicated by the chain double-dashed line so as not to hinder the towing of the ship. It is necessary to stand up so that it does not project to the sea side B. Therefore, the top iron frame 12 is provided on the main body frame 1, and the top iron frame 12 is
A boom fixing device for fixing and holding the standing position of the boom 9 is provided. In FIG. 3, 13 is a backstay supporting the top steel structure 12, 14 is a tension bar supporting the boom 9, 15 is a hoisting wire, and 16 is a machine room for housing the hoisting drive device and the like.

In the conventional boom fixing device, as shown in FIGS. 4 and 5, a supporting frame 17 is provided at the upper end of the top steel structure 12 so as to project toward the front. A hook portion 18a is provided on the tip of the tip of the upper part of the tip 17
The hook lever 18 having the above is arranged in the front-rear direction so that the hook portion 18a is located on the sea side B, and
The bracket 2 provided on the support frame 17 at a position closer to the rear end than the central portion of the hook lever 18 via a pedestal 19
0 is rotatably attached in the vertical direction via a horizontal pin 21, and a turning device 22 for turning the hook lever 18 is connected to the rear end of the hook lever 18.
By rotating the hook lever 18 by driving the rotating device 22, the hook portion 18a can be locked to the locking pin 24 attached to the upper surface of the boom 9 through the arm 23. The bracket 25 is horizontally extended toward the sea side B through the pedestal 26 at the most distal end of the support frame 17, and the bracket 25 has a short anti-rare portion 27a and a long anti-rare portion 27b. Connect the corners of the L-shaped anti-clamping metal fitting 27 formed by integrating the
It is attached so as to be rotatable in the horizontal direction by means of 8, and a buffer 29 is provided on the upper surface side of the boom 9 so as to correspond to the tilt-prevention metal 27. 30 is a tension wire for holding the normal position of the hook lever 18 by its own weight,
Reference numeral 31 denotes a fixing pin for fixing the position of the anti-rattle fitting 27.

When the standing position of the boom 9 is fixed by the boom fixing device, the hook lever 18 is rotated by the rotating device 22 to wait the hook portion 18a upward as shown by the chain double-dashed line in FIG. In addition to the above, as shown in FIG. 5, the short anti-raising portion 2 of the anti-raising metal fitting 27.
7a is projected forward, and the undulating wire 15 shown in FIG. 3 is wound up so that the boom 9 is erected. In this case, the boom 9 is erected up to a position where the locking pin 24 once passes over the position of the hook portion 18a (overrun), and at this time, the buffer 29 is brought into contact with the tilt-prevention portion 27a and the boom is boomed. 9, the hook lever 18 is returned to the position shown by the solid line in FIG. 4, and then the boom 9 is returned in the fall direction to lock the locking pin 24 on the hook portion 18a. Then, as shown by the chain double-dashed line in FIG. 5, the long anti-raising portion 27b of the anti-raising metal fitting 27 is projected forward, and further, the fixing pin 31 is inserted into the bracket 25 to attach the anti-raising metal fitting. The position of 27 is fixed. Therefore, in normal times, the hook pin 18a of the hook lever 18 is locked by the locking pin 24 so that the boom 9 is maintained in the upright state, and when the boom 9 is fanned during a storm or the like, Anti-rare part 2 of anti-rare metal fitting 27
The movement of the boom 9 is restricted by bringing the buffer 29 into contact with 7b.

[0006]

However, in the case of the conventional boom fixing device for a container crane, the operation of changing the direction of the anti-rare fitting 27 must be performed every time the work of fixing the boom 9 is performed. This operation must be performed manually by a worker as work at a high place, and the work of inserting the fixing pin 31 into the bracket 25 to fix the position of the anti-raveling fitting 27 is also a work at a high place. There is a problem that it must be done. Also, in the case of the method of attaching and detaching the fixing pin 31,
Since a pin hole is required for the bracket 25 and the anti-raveling metal fitting 27, the joining portion must be machined at the time of production, and a device must be devised to prevent the fixing pin 31 from falling off. There is a problem that the structure becomes complicated.

Further, there is a method of using an actuator to enable remote control by this mechanism, but two operations, that is, rotating the anti-rattle fitting 27 and attaching and detaching the fixing pin 31 must be performed. However, the structure is complicated and it is troublesome to deal with it.

Therefore, the present invention enables the boom to be fixed to the upright state without the need for the operator to perform work in a high place, and further, the machining during manufacturing can be reduced and the arrangement and the structure can be simplified. It is something that tries to be able to.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a boom on a front end of a girder horizontally supported by a container crane body frame so that the boom can be raised and lowered, and is provided on the body frame. At the top of the top steel structure,
By providing a supporting frame that projects toward the front and locking the boom side locking pin with the tip hook part of the hook lever provided on the supporting frame, the movement of the raised boom to the fallen side can be prevented. In the boom fixing device of the container crane that is constrained, at the tip of the above support frame, a receiving metal fitting is fixed so that the tip surface faces forward,
At the required position on the upper surface side of the boom, a boom stopper for facing the receiving bracket is rotatably attached in the boom longitudinal direction, and an actuator for rotating the boom stopper is installed. At this time, the boom stopper is mounted on the boom so as to hold the boom stopper and keep the posture of the boom stopper obliquely downward.

Further, an electric cylinder is used as an actuator, and the electric cylinder is tiltably attached to the boom,
Further, the connecting pin protruding from the boom stopper may be engaged with the elongated hole of the connecting fitting provided at the rod tip of the electric cylinder.

Further, an electric cylinder may be used as the actuator, the electric cylinder may be fixedly installed on the boom, and the rod tip of the electric cylinder and the boom stopper may be connected by a cord.

[0012]

[Operation] When the boom is erected and fixed, first, with the boom stopper rotatably displaced by the operation of the actuator, the boom is erected and the fixing pin is attached to the tip hook portion of the hook lever. After that, the boom stopper is pivotally displaced toward the boom base end side by the operation of the actuator. As a result, the boom stopper is placed in a downward posture by being placed on the stopper receiving member for holding the posture, and is opposed to the receiving metal fitting on the support frame side. Therefore, even if the boom is fueled,
When the boom stopper comes into contact with the receiving metal fitting, the movement of the boom is restricted.

Further, an electric cylinder is used as the actuator, and the rod tip of the electric cylinder and the boom stopper are connected by a connecting fitting having an elongated hole and a connecting pin engaged with the elongated hole, or by a wire. If you connect with a rope-like object such as a chain or a chain, you will not be forced to press the boom stopper against the stopper receiving member,
The accuracy of stopping the electric cylinder can be made rough.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and similarly to that shown in FIGS. 3 to 5, a support frame 17 is projected from the upper end of the top steel structure 12 toward the sea side B which is the front side. The hook pin 18a of the hook lever 18 provided at the tip of the support frame 17 is used to lock the pin 2 on the boom 9 side.
In the boom fixing device of the container crane in which the movement of the boom 9 in the fall direction is restrained to keep the standing state by locking the boom 4, the tip end surface of the support frame 17 is the sea side B. The receiving bracket 32 is fixedly mounted via the pedestal 26 so that the boom 9 is directed toward the upper end of the boom 9. At the upper position, the boom stopper 33 having a required length corresponding to the receiving bracket 32 is provided.
Is rotatably attached in a direction along the boom 9 by a horizontal pin 34 so that when the boom 9 is erected, the boom stopper 33 faces the bracket 32 in an obliquely downward posture. An electric cylinder 35 as an actuator for rotating 33 is installed so as to be tiltable at a position further closer to the boom tip than the boom stopper mounting position, and the rod tip of the electric cylinder 35 is connected to have a long hole 36a. Positions where the boom stopper 33 is sandwiched with stopper receiving members 37 and 38 for engaging the connecting pin 33a protruding from the boom stopper 33 via the metal fitting 36 and for restricting the rotation range of the boom stopper 33. Is attached to the stopper receiving member 3 at a position on the rotation locus line 1 passing through the receiving metal fitting 32 of the boom 9.
8 is used to attach the buffer 29, and when the boom stopper 33 is retracted as shown by the alternate long and short dash line, the buffer 29 can be brought into contact with the receiving fitting 32.

The bracket 32 and the boom stopper 3 are provided.
The opposite tip surfaces of 3 are inclined so that the boom stopper 33 can maintain a state in which the boom stopper 33 cannot be lifted up with the horizontal pin 34 as a fulcrum when the boom 9 is swung toward the land side A. Further, between the tip surfaces of the receiving metal fitting 32 and the boom stopper 33, the boom stopper 33 is connected to the receiving metal fitting 32 at the standing position of the boom 9 in which the locking pin 24 is locked to the hook portion 18a of the hook lever 18. A minute gap S is set so that it can be rotated without coming into contact with it. Further, although not shown, a limit switch is used to issue a stop command at the stroke end of the electric cylinder 35.

When the boom 9 is to be erected and fixed, the boom stopper 33 is rotated to the boom tip end side by the operation of the electric cylinder 35 and is displaced to the position where it hits the stopper receiving member 37, as shown by the chain double-dashed line in FIG. In this state, first, as in the case of the conventional boom fixing device shown in FIGS. 4 and 5, the hook lever 18 is rotated in the vertical direction and the boom 9 is temporarily moved to the land side A from the fixing position. By performing a turning operation of overrunning to the sea side B, the locking pin 24 on the boom 9 side is locked by the tip hook portion 18a of the hook lever 18,
The boom 9 is restrained from falling on the sea side B. In addition, in the above, when the boom 9 is overrun to the land side A, the upper surface side of the boom 9 comes into contact with the receiving metal fitting 32. At this time, the buffer 29 contacts the receiving metal fitting 32. The range of overrun is regulated and the impact force is buffered. Next, in FIG. 1, as indicated by the solid line, the electric cylinder 35
Operation of the boom stopper 33 to the stopper receiving member 38
It is rotated and displaced to the position where it comes into contact with. As a result, the boom stopper 33 is placed on the stopper receiving member 38 and is held in an obliquely downward posture, and at the same time, it is opposed to the receiving metal fitting 32. At this time, the electric cylinder 35
Since the boom stopper 33 and the boom stopper 33 are connected by the connecting fitting 36 having the long hole 36a, the boom stopper 33 is not forcedly pressed against the stopper receiving member 38, and therefore the stopping accuracy of the electric cylinder 35 may be rough. .

As described above, when the boom 9 is erected and held up and the boom 9 is agitated to the land side A in a strong wind, the boom stopper 33 should come into contact with the bracket 32. Thus, the movement of the boom 9 toward the land side A is restricted.

In the above, the bracket 32 is fixed in position,
The boom stopper 33 is operated by driving the electric cylinder 35, and the posture of the boom stopper 33 when the boom is fixed is held obliquely downward by the stopper receiving member 38. Since there is no rotation operation of 27 and attachment / detachment operation of the fixing pin 31, it is possible to eliminate work at high places. Further, since the boom stopper 33 can take a posture facing the fixed receiving metal fitting 32 simply by mounting it on the stopper receiving member 38, the connecting structure of both is extremely simple, and the fixing pin as in the conventional case is used. Since it is not necessary to provide a pin hole for attaching / detaching 31 by machining, manufacturing can be easily performed.

Next, FIG. 2 shows another embodiment of the present invention. In the same construction as that of the embodiment of FIG. 1, the electric cylinder 35 and the boom stopper 33 are connected to each other with a slot 36a. Instead of the metal fitting 36, a cord-like material 39 such as a wire or a chain is used, and the electric cylinder 35 is fixedly installed on the boom 9.

In the case of the embodiment shown in FIG. 2 as well, the presence of the cords 39 makes it possible to roughen the stopping accuracy of the electric cylinder 35 when the boom stopper 33 is placed on the stopper receiving member 38.

In the above embodiment, the boom stopper 3
Although the case where the stopper receiving members 37 and 38 are provided so as to sandwich 3 on both sides in the longitudinal direction of the boom 9 is shown, if there is a stopper receiving member 38 that holds the posture of the boom stopper 33 when the boom is erected and fixed, a stopper receiving member 38 may be provided. The member 37 does not necessarily have to be provided, and the bracket 32 and the boom stopper 33 are not necessarily provided.
A buffer may be attached to either or both of the front end surfaces of the device, and other devices may be used as the actuator, and other various changes are made without departing from the scope of the present invention. Of course you can get it.

[0023]

As described above, according to the boom fixing device for a container crane of the present invention, the boom stopper, which is rotated by the actuator and held in the downward posture by the stopper receiving member, is provided on the boom side, and the boom stopper is provided. The bracket that receives the stopper is fixed to the support frame, and the boom stopper can be stopped from standing up and fixed by the engagement of the boom stopper and the bracket. Work at high places can be eliminated, and since attachment / detachment of fixing pins is not required in the connection between the boom stopper and the receiving metal fitting, there is little machining and manufacturing is easy.
If an electric cylinder is used as the actuator and the rod tip of the electric cylinder and the boom stopper are connected by a connecting fitting having a connecting pin and a long hole or a cord-like object, even if the stopping accuracy of the electric cylinder is rough, It has excellent effects such as eliminating the need to force the boom stopper against the stopper receiving member.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a boom fixing device for a container crane of the present invention.

FIG. 2 is a schematic view showing another embodiment of the present invention.

FIG. 3 is a schematic diagram showing an example of a container crane.

FIG. 4 is a schematic side view showing an example of a conventional boom fixing device.

5 is a view taken along the line VV of FIG.

[Explanation of symbols]

 1 Container Crane Main Frame 8 Girder 9 Boom 12 Top Iron Structure 17 Support Frame 18 Hook Lever 24 Locking Pin 32 Receiving Metal Fitting 33 Boom Stopper 33a Connecting Pin 35 Electric Cylinder (Actuator) 38 Stopper Receiving Member 39 Cable

Claims (3)

[Claims] 1. A boom is movably connected to a front end of a girder horizontally supported by a container crane main body frame, and an upper end portion of a top steel structure provided on the main body frame,
By providing a supporting frame that projects toward the front and locking the boom side locking pin with the tip hook part of the hook lever provided on the supporting frame, the movement of the raised boom to the fallen side can be prevented. In the boom fixing device of the container crane that is constrained, at the tip of the above support frame, a receiving metal fitting is fixed so that the tip surface faces forward,
At the required position on the upper surface side of the boom, a boom stopper for facing the receiving bracket is rotatably attached in the boom longitudinal direction, and an actuator for rotating the boom stopper is installed. A boom fixing device for a container crane, wherein a boom stopper is attached to the boom to hold a boom stopper at a time and hold the posture of the boom stopper obliquely downward. 2. An electric cylinder is used as an actuator, the electric cylinder is tiltably attached to a boom, and a connecting pin protruding from a boom stopper is engaged with a long hole of a connecting fitting provided at a rod tip of the electric cylinder. The boom fixing device for a container crane according to claim 1, which is combined. 3. The container crane according to claim 1, wherein an electric cylinder is used as the actuator, the electric cylinder is fixedly installed on the boom, and the rod end of the electric cylinder and the boom stopper are connected by a cord. Boom fixing device.