JPS61267686A - Crane device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a crane device capable of controlling the posture of a heavy object being lifted.

[Conventional technology]

Conventionally, when assembling steel frames etc. using a crane, a ground worker connects a hanging hook lowered to the ground to the steel frame temporarily placed at the loading area, and then the crane operator operates the steel frame to reach the construction floor. The lifting hook is hoisted up, and the crane boom is operated according to the instructions of the guidance staff to move the steel frame to the planned installation position. Next, a method is used in which a construction worker temporarily tightens the bolts by correcting the position using an intervening rope or the like and then attaching the temporary tightening bolts.

Furthermore, when lifting a particularly heavy object, it has been proposed to mechanically operate an intervening wire from a tower mast or the like to adjust the position of the object to be lifted.

[Problem that the invention seeks to solve]

However, in such conventional methods, it is difficult to correct the position of the object to be lifted, such as a steel frame, due to swaying or twisting of the wire, and especially during temporary tightening, if there is wind, the swaying of the wire may occur. There was a problem that the twisting became large and the work became dangerous.

In addition, the method of operating the branch wire from the tower mast has the problem that when installing a steel frame or the like in a narrow space, the branch wire comes into contact with the building frame, etc., making it difficult to correct its position.

[Means for solving problems]

In a crane device comprising a traveling device provided to run stably on a predetermined track, and a lifting device provided on the traveling device, the lifting device has a pantograph shape that is biased to extend downward. The frame body is suspended with a strip below the lower end of the frame, and when driven upward, it engages the lower end and compresses the frame, thereby locking an object to be lifted. The gist of its structure is that it consists of a locking tool.

[Effect]

The locking section locks the object to be lifted, such as a steel frame, and is lifted by the strip. This locking tool engages the lower end of the frame as it rises, and as it rises further, it compresses the frame against the tensile force of the spring or cylinder. This increases the rigidity of the frame and provides durability against external loads such as wind from the side, thereby stabilizing the object to be lifted.

The traveling device transports the object to be lifted, whose frame body is compressed and is in a stable state, to the planned installation position.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described in detail below.

The figure shows an embodiment in which the crane device according to the present invention is applied to a tower crane having a horizontal crane pool.

In the figure, reference numeral 1 denotes a horizontally extending crane poom of a tower crane A, and guide rails 2, 2 are provided on both sides of the crane poom 1. and,
A traveling device B consisting of a trolley 173.4 is provided on this rail 2.2 in a freely traveling manner.

Note that, as shown in FIGS. 2(a) and 2(b), the trolley 3 is located inside the trolley 4 and is provided integrally with the trolley 4. Moreover, the vehicle 3a provided on the trolley 3 runs on the upper surface of the guide rails 2, 2, so that it can withstand the downward load applied to the trolley 3.

Two pairs of wheels 4a of the trolley 4 are provided on both sides of the trolley 4, and each pair of wheels 4a, 4a abuts the guide rail 2゜2 from above and below to ensure stable running of the traveling device B. is possible.

A sheave 5 on which a wire 6 is hung is pivotally supported at the lower part of the trolley 3. It is served for lowering.

At the bottom of the traveling device B, a frame C is provided which is composed of a frame body 8.8 and a lower frame 10.

The frame C will be explained below.

At the bottom of the trolley 4, pantograph-shaped extensible bodies 8.8, which are vertically extensible and retractable, are provided so as to face each other. Joints 8a, 8a of the frame body 8 on the same horizontal level are connected by a spring 9, and the tension of the spring 9 urges the frame body 8 to extend downward. Further, in addition to the spring 9, a cylinder can also be used.

Note that the lower ends of both frame bodies 8.8 are connected to the lower frame 10.
are provided and connected. A locking hole 11 whose diameter increases downward is provided in the center of the lower frame 10, and the wire 6 is passed through the locking hole 11.
The locking tool 7 is suspended so as to be positioned below the lower frame 10. Note that an engaging member 7a that engages the inner wall of the engaging hole 11 is provided at the upper part of the locking tool 7.

Furthermore, a gear-shaped groove 11a is carved in the inner wall of the hole 11 in the fitting direction of the engaging member 7a, and
A gear-shaped protrusion 7b that meshes with the groove 11a is provided on the circumferential surface of a.
is provided, and the engagement between the groove 11a and the protrusion 7b prevents rotational deviation of the locking tool 7.

3(a) and 3(a) show a rotation adjustment device provided on the lower pedestal 10. As shown in FIG.

In the figure, 12 is a frame that constitutes the lower pedestal 10.

Bearings 14 to 14 are provided at the center of the lower frame 10 so that the rotating member 13 having the engaging hole 11 can freely rotate with respect to the frame 12, and the bearings 14 contact the circumferential surface of the rotating member 13 at a plurality of locations. It is being

Further, a wire winding drum 15 is integrally provided on the upper end surface of the rotating member 13 so as to surround the hole 11. The motor 1 is mounted at two predetermined locations on the frame 12.
7A and 17B are fixed. These motors 17A,
Reels 18a, 1 are attached to the shafts 17a, 17b of 17B.
8b are provided around which wires 16a and 16b are wound, respectively.

These wires 16a and 16b are wound in opposite directions to the wire winding drum 15,
By inputting and operating the motors 17A and 17B separately, the rotating member 13 can be rotated to any angle.

The rotation of the rotating member 13 is reliably transmitted to the locking tool 7 due to the anti-slip effect of the groove 11a carved in the inner wall of the locking hole 11 and the protruding strip 7b of the locking member 7a. This makes it possible to accurately control the direction of the object to be lifted, which is locked by the lever 7.

The present invention will be explained in detail below. The locking tool 7 that locks the object to be lifted, such as a steel frame, rises and engages the engagement hole 11 of the lower pedestal 10 at the lower end of the frame C.

Furthermore, when the wire 6 is wound up, the locking tool 7 is attached to the lower frame 1.
Push up 0. At this time, the tension generated by the stretching of the spring 9 and the tension of the wire act as mutual reaction forces to provide rigidity to the frame C itself.

The object to be lifted, supported by the lower pedestal lO of the frame C in this way, is moved to the appropriate planned installation position by the support of the guide or by the crane operator's judgment, by the swing operation of the crane poom 1, or by the operation of the crane poom 1. It is transported by a turning operation and a traveling operation of the traveling device B.

Next, when the object to be lifted reaches a predetermined position, the rotation adjustment device rotates the object to an appropriate orientation for installation. Then, by unwinding the wire 6, the object to be lifted is lowered to the installation position, and then temporary tightening is performed. After the temporary tightening is completed, the wire 6 is loosened and the locking tool 7 is removed from the object to be lifted.

In addition, in the above-mentioned embodiment, the tower crane is
Although the crane device according to the present invention has been described, other cranes such as gate type cranes and horizontal cranes can also be used.

Of course, the present invention can be applied to various structures such as overhead cranes.

In addition, in the above-mentioned embodiment, the rotation adjustment device is
Although it is provided on the lower pedestal 10 of the frame C, other parts of the frame C
Various design changes are planned, such as the configuration in which the blade rotates.

〔Effect of the invention〕

As is clear from the above explanation, the structure is such that the frame body, which is urged to extend downward by the spring, is compressed by the rise of the locking tool, thereby imparting rigidity to the frame body and increasing the Unsteadiness due to external loads such as wind in places etc. 1. This has the effect of preventing twisting and the like and allowing the object to be lifted to be accurately and safely transported to the planned installation position.

Further, since the structure is such that rigidity is provided to prevent the frame from wobbling or the like, there is an effect that positioning of the object to be lifted is facilitated.

[Brief explanation of drawings]

FIGS. 1, 2(a) and 2(b) are explanatory diagrams showing one embodiment of the crane device according to the present invention, FIG. 3(a),
(BL is an explanatory diagram showing a rotation adjustment device provided on the lower frame. B... Traveling device, C... Frame body, D...
...Rotation adjustment device, 2...Rail, 5...
...Sheep, 6...Wire, 7...
- Locking tool, 10...lower pedestal. Patent Applicant Taisei Corporation Agent Patent Attorney Tetsuya Mori Patent Attorney Yoshiaki Naito Agent Patent Attorney Tadashi Shimizu Figure 1 Figure 3 (G) (b) Figure 2 (b)

Claims (2)

[Claims] (1) In a crane device consisting of a traveling device provided to run stably on a predetermined track and a lifting device provided on the traveling device, the lifting device is biased to extend downward. A pantograph-shaped frame body is suspended with a strip below the lower end of the frame, and when driven upward, it engages the lower end and compresses the frame. A crane device comprising a locking device for stopping the crane. (2) The crane device according to claim 1, wherein the locking tool engages with the lower end of the frame and can be rotated with respect to the track.