JP3343290B2 - Tower crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower crane and, more particularly, to an improvement in the visibility of a driver's seat of a tower crane.

[0002]

2. Description of the Related Art Conventionally, in tower cranes such as a jib tower crane and a horizontal tower crane, an operator's seat 20 is provided at the top of the tower as shown in FIGS. Person 21 is a crane 22, 2
3 and, as shown in FIGS. 8 and 9,
There is known a remote control type embodiment in which the driver's seat is not provided on the crane post 24 and the operator 21 operates the cranes 25 and 26 by remote control.

[0003]

However, in the above-described embodiment, the distance between the driver's seat at the top of the tower and the construction floor where the hook of the crane approaches the object to be lifted is so long that it can be seen from obliquely above. However, the driver's seat cannot clearly confirm the state of the hook and the state of engagement with the work object, resulting in poor visibility, leading to erroneous operation and poor working efficiency. Further, in the embodiment, since the operator himself / herself operating the crane is within the working range of the crane, a dangerous state such as contact or collision may occur due to approach of a hook or a lifting object,
There was a problem that the working environment was bad.

[0004] As described above, the conventional tower crane has a problem to be solved in terms of obtaining reliable visibility. The present invention has been made in view of the above problems, and has as its object to provide a tower crane having a driver's seat capable of maintaining good visibility.

[0005]

The gist of the present invention to solve the above problems and achieve the above object is a tower crane comprising a crane post and a crane, wherein the tower crane can be moved up and down by a lifting means. Lift guide, a guide rail fixed in the circumferential direction of the lift guide,
A movable driver's seat provided with an operation / control unit for operating the lifting operation of the crane and the lifting / lowering action of the lifting / lowering means while rotatably engaging with the guide rail and rotating around the crane post; , Consisting of a tower crane.

The elevating means is formed of a suspension wire from which a lifting guide is suspended, a winding drum for winding and unwinding the suspension wire, and a drive motor for rotating the winding drum. Stopping means for abutting against the surface of the guide rail and acting as a brake for the rotation of the movable driver's seat is provided in the movable driver's seat; A safety stopper is provided to protrude and engage with the crane post after being positioned in the vertical direction with respect to the crane post; The means is connected by wireless communication means.

[0007]

According to the tower crane of the present invention, the movable driver's seat can be moved up and down with respect to the crane post, and can be pivoted both circumferentially and clockwise or counterclockwise. The engagement between the hook and the object to be lifted can be viewed from close up.

[0008] Since the lifting / lowering means is constituted by a suspension wire, the lifting / lowering guide can be raised / lowered with a relatively simple structure.

The moving driver's seat stopping means can quickly and accurately stop the rotation of the driver's seat at a desired position.

After the elevating guide vertically moved with respect to the crane post stops at the desired position by the safety stopper provided on the elevating guide, the safety stopper protrudes toward the crane post at that position. The lifting guide is safely positioned.

[0011] Since the operation / control section of the mobile driver's seat and the elevating means provided on the crane post are connected by wireless communication means, there is no need to wire a cable for electrical connection for operation. It does not hurt the movement of the guide and mobile driver's seat.

[0012]

Next, an embodiment according to the present invention will be described in detail with reference to the drawings. Tower crane 1 according to the present invention
Is a tower crane 1 comprising a crane post 2 and a crane 3 erected on the ground, as shown in FIG.
An elevating guide 5 which is made to be able to move up and down by the elevating means 4 on the crane post 2, a guide rail 6 fixed in the circumferential direction of the elevating guide 5, and the crane post 2 And a moving driver's seat 7 provided with an operation / control unit for operating the lifting operation of the crane 3 and the lifting / lowering action of the lifting / lowering means 4.

In the following, each part will be described. The elevating means 4 comprises a suspending wire 8 which suspends an elevating guide 5.
And a winding drum 9 for winding and unwinding the hanging wire 8, and a drive motor (not shown) for rotating the winding drum 9. The rotation control of the drive motor is performed by an operation / control unit of the mobile driver's seat 7 described later.

The lifting guide 5 is, as shown in FIG.
It is a metal (for example, a steel plate, an iron plate or an aluminum plate) box-shaped cylindrical shape surrounded by the outer periphery of the crane post 2 so that when the crane post 2 is vertically moved by the lifting / lowering means 4, it moves smoothly. In addition, an appropriate number of rolling rollers 5a are provided in the circumferential direction at two locations above and below the frame.

As shown in FIGS. 2 to 4, the guide rail 6 has an H-shaped cross section and is made of, for example, H steel. The H-shaped guide rail 6 is fixed to the elevating guide 5 in the circumferential direction of the elevating guide 5 by welding or other means at appropriate intervals by welding or the like, and welding the guide rail 6 to the distal end of the fixing member 6a. The upper and lower guides 5 are fixed to each other, and are formed in a substantially circular flange shape at two upper and lower positions.

The mobile driver's seat 7 is, as shown in FIG.
The crane post 2 is rotatably engaged with the guide rail 6 so as to freely rotate around the crane post 2.

The engagement state described above is based on the condition that the wheel 7a brought into contact with the bottom surface of the concave groove of the H-shaped guide rail 6 and the axle 10
And a gear box 11 for rotating the axle 10 at a reduced speed
And a motor 12 for transmitting torque to the gear box 11
An engaging member 13 for preventing the wheels 7a from coming off from the frame of the mobile driver's seat 7 is provided in an L-shape.

A stopping means 14 which projects from the surface of the mobile driver's seat 7 by hydraulic action and abuts on the surface of the guide rail 6 to brake the rotation of the mobile driver's seat 7 is provided on the mobile driver's seat 7. Is provided.

Further, above the mobile driver's seat 7, FIG.
As shown in FIG. 3 to FIG. 3, a communication antenna 15 for wireless communication is provided in order to transmit a command from the operation / control unit to the lifting / lowering means 4 provided above the crane post 2.
Of course, the elevating means 4 is provided with a receiving device.

As shown in FIG. 5, after the elevating guide 5 is positioned vertically with respect to the crane post 2, a part of the crane post 2 is provided with hydraulic means. For example, a safety stopper 16 that protrudes and engages is provided. The safety stopper 1
6 is provided at a minimum number of two or four in the circumferential direction of the crane post 2. As a result, it is possible to reliably prevent the lifting guide 5 from falling due to an unexpected situation.

With the tower crane 1 having such a structure, the moving driver's seat 7 can be moved up and down by operating the elevating means 4 from the mobile driver's seat 7, and the motor 12 rotates with respect to the guide rail 6. By doing so, the traveling driver's seat 7 can be rotated around the crane post 2.

An example of use of the tower crane 1 will be described. As shown in FIG. 1, the moving driver's seat 7 is moved to the lowest position (shown by a broken line) of the crane post 2, and the operator 17 Gets inside the mobile driver's seat 7.

Then, by operating the operation / control section, the drive motor of the lifting / lowering means 4 is rotated via the wireless communication means, and the hanging wire 8 is wound by the winding drum 9 to lift the mobile driver's seat 7. The object is raised to a predetermined position near the target so that the subject can look straight ahead.

After stopping to ascend, the safety stopper 16 shown in FIG. 5 is projected by hydraulic pressure or the like to engage with the crane post 2 to prepare for an unexpected drop.

Next, as shown in FIG. 4, the motor 12 is rotated by a predetermined amount to rotate the wheels 7a, and the mobile driver's seat 7 is rotated in a desired direction. When the desired position is reached, the pin of the stopping means 14 is protruded by hydraulic pressure or the like, and abuts against the surface of the guide rail 6 to cause a braking action, thereby stopping the rotation of the mobile driver's seat 7.

Thereafter, the crane 3 is rotated by a required amount toward the lifting object, the hook 18 is lowered, and the lifting object is lifted. Then, the crane 3 is rotated to move the lifting object to a predetermined position, the moving driver's seat 7 is rotated to move it to a desired position, and the hook 18 is lowered to move the lifting object to a predetermined position. Move to the location.

The vertical movement and the circumferential rotation of the moving driver's seat 7 operate independently of the lifting operation of the crane 3, so that the moving operation can be performed simultaneously with or separately from the rotation of the crane 3 and the lifting / lowering of the hook. The seat 7 can be raised and rotated. It is also preferable that the rotation of the crane 3 and the rotation of the movable driver's seat 7 can be interlocked, or the interlocking relationship can be cut off so as to rotate independently.

Thus, the tower crane 1 according to the present invention
According to this, the moving driver's seat 7 can always be moved to the position closest to the construction floor where the hook of the crane is lowered, and the crane can be operated while the lifting work is well checked.

As another embodiment of the present invention, the elevating means 4 may use the motor for rotating the winding drum 9 as the winding motor for the crane 3 by switching a clutch or the like. it can. Alternatively, a lifting and lowering means in which a rack and pinion is directly provided on the lifting guide 5 and the crane post 2 without using the hanging wire 8 may be used.
Further, the guide rail 6 may be a concave groove provided on the surface of the lifting guide 5, and an engaging member may protrude from the moving driver's seat 7 into the concave groove so as to be freely movably engaged.

[0030]

As described above, the tower crane according to the present invention is a tower crane comprising a crane post and a crane, wherein the crane post is configured to be able to move up and down by a lifting means, and the lift guide is provided. And a guide rail fixed in the circumferential direction of the crane post, while being rotatably engaged with the guide rail and rotating around the crane post,
A moving driver's seat provided with an operation / control unit for operating the lifting operation of the crane and the lifting / lowering action of the lifting / lowering means, so that the position of the hook of the crane is moved to the nearest position or a position close to the construction floor. Since the driver's seat can be moved freely, there is an excellent effect that visibility is improved, safety of lifting work is improved, and work efficiency is improved.

The elevating means is formed of a hanging wire from which an elevating guide is hung, a winding drum for winding and unwinding the hanging wire, and a drive motor for rotating the winding drum. Therefore, there is an excellent effect that the mobile driver's seat can be raised and lowered with a simple structure.

Further, since the stopping means which is in contact with the surface of the guide rail and acts as a brake for the rotation of the movable driver's seat is provided in the movable driver's seat, the rotation can be reliably stopped at a desired position. It has an excellent effect.

Since the lifting guide is provided with a safety stopper that projects and engages with the crane post after the lifting guide is positioned vertically with respect to the crane post, an unexpected situation occurs. However, the lift guide and the mobile driver's seat do not fall, and an excellent effect of ensuring safety is achieved.

The operation / control section of the mobile driver's seat and the elevating means provided on the crane post are connected by wireless communication means, so that there is no need to wire a cable to be electrically connected for operation. It has an excellent effect that it does not injure the movement of the guide and the mobile driver's seat.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a use state of a tower crane according to the present invention.

FIG. 2 is a partially enlarged perspective view of the tower crane of the present invention.

FIG. 3 is a partially enlarged front view of the tower crane of the present invention.

FIG. 4 is an explanatory diagram showing an engagement state between a moving driver's seat and a guide rail in the tower crane.

FIG. 5 is an explanatory diagram showing an engagement state between a crane post and a safety stopper provided on a lifting guide in the tower crane.

FIG. 6 is an explanatory view of a horizontal crane according to a conventional example.

FIG. 7 is an explanatory view of a jib crane according to a conventional example.

FIG. 8 is an explanatory view of a horizontal crane without a driver's seat according to a conventional example.

FIG. 9 is an explanatory view of a jib crane without a driver's seat according to a conventional example.

[Explanation of symbols]

 1 tower crane, 2 crane post, 3 crane, 4 lifting device, 5 lifting guide, 6 guide rail, 7 moving driver's seat, 8 suspension wire, 9 winding drum, 13 engaging member, 14 stopping means, 15 communication antenna, 16 Safety stopper.

Claims (5)

(57) [Claims] 1. A tower crane comprising a crane post and a crane, comprising: an elevating guide rotatable on the crane post by elevating means; a guide rail fixed in a circumferential direction of the elevating guide; A mobile driver's seat provided with an operation / control unit for operating the lifting operation of the crane and the lifting / lowering operation of the lifting / lowering means while rotating around the crane post by freely engaging with the vehicle. A tower crane characterized by that: 2. The lifting / lowering means is formed by a suspension wire from which a lifting guide is suspended, a winding drum for winding and unwinding the suspension wire, and a drive motor for rotating the winding drum. The tower crane according to claim 1, wherein: 3. The tower crane according to claim 1, wherein stop means for abutting against the surface of the guide rail and acting as a brake for rotating the movable driver's seat is provided on the movable driver's seat. 4. The lifting guide is provided with a safety stopper that projects and engages with the crane post after the lifting guide is positioned vertically with respect to the crane post. 4. The tower crane according to 2 or 3. 5. The method according to claim 1, wherein the operation / control section of the mobile driver's seat and the lifting / lowering means provided on the crane post are connected by wireless communication means. Tower crane.