JPH0457597B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hoisting machine, and more particularly to a hoisting machine equipped with a wire rope end attachment device that supports the end of a wire rope.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 56-134650, a conventional hoisting machine has a U-groove on the outer periphery of a socket-mounted sheave, a socket-mounted seat at one end of the U-groove, and a socket-mounted sheave that can be reversed. Attach to a U-shaped hanger via a sheave pin, attach this hanger to the outer frame support plate via the shaft, wrap the wire rope around the U groove of the socket installation sheave, and attach the socket at the tip to the socket seat. It was something to do.

[Problem that the invention seeks to solve]

In such conventional hoisting machines, a load that is less than the lifting load acts on the socket due to the contact resistance force generated between the U-groove and the wire rope that is simply wound around the U-groove of the socket-mounted sheave. Because of this structure, the part of the wire rope wound around the U-groove could become slack due to the winding repulsion of the wire rope itself, or the lifting device attached to the hook block could land or fall in places with low lifting height. When the wire rope is used under conditions such as thrusting, loosening due to the wire rope thrusting phenomenon cannot be avoided. Therefore, when a load is lifted with the wire rope in the U-groove part loosened, a slipping phenomenon occurs between the wire rope and the U-groove until it is tightened in the U-groove at the moment of lifting, causing wear and tear on the wire rope. hastened. In addition, impact was applied to the socket, reducing the reliability of the connection between the socket and the wire rope.

An object of the present invention is to prevent the wire rope wound around the wire rope terminal attachment device from loosening without reducing maintenance and inspection performance, and to provide highly reliable hoisting for various uses of the hoisting machine. It provides an opportunity for

[Means for solving problems]

To achieve this purpose, one end of the wire rope is attached to a winding drum, the other end of the wire rope is fixed to a socket, a shaft is attached to a support formed on the outer frame of the hoist, and this shaft The socket is hung so as to straddle a hanging fitting made of a steel plate bent into an inverted U shape, and has a U groove on the outer periphery inside the hanging fitting and a vertical groove for inserting a wire rope at one end of the U groove. A wire rope end mounting sheave integrally formed with a mounting seat is attached to the hanging fitting with a pin, a wire rope is wound around a U-groove of the sheave, and the socket is attached to the socket mounting seat. The hoisting machine is equipped with a rope end attachment device, and is characterized in that a wire rope loosening prevention mechanism is provided on the outer circumference of the wire rope wound around the U-groove of the sheave.

[Effect]

In such a hoisting machine, a wire rope loosening prevention mechanism is applied to the outer periphery of the wire rope wound around the U-groove of the sheave, so that the wire rope does not loosen due to the winding repulsive force of the wire rope itself, or can be used in areas with low lifting height. When the hoist attached to the hook block is used under conditions such as landing or being pushed up, the wire rope will not loosen even when the wire rope is pushed up. Therefore, when lifting a load, the wire rope does not slip, and no impact is applied to the socket.

〔Example〕

Hereinafter, one embodiment of the present invention will be specifically described based on FIGS. 1 to 5.

Here, FIG. 1 is a perspective view of a wire rope end attachment device in a hoisting machine according to an embodiment of the present invention, FIG. 2 is a sectional view of the wire rope end attachment device, and FIG. 3 is a sectional view of the wire rope end attachment device. FIG. 4 is a perspective view of the wire rope pusher and nut which are the component parts of the present invention.
FIG. 5 is a side view of the exterior of the hoisting machine showing the state in which the wire rope terminal is attached to the hoisting machine; FIG. It is.

First, in FIG. 4, one end of the wire rope 3 is attached to the winding drum 2 of the hoist 1, the other end of the wire rope 3 is fixed to the socket 4, and the pulley (not shown) of the hook block 5 from which the load is hung is attached. The socket 4 is attached to a wire rope end attachment device 8 attached to a support plate 7 of two outer frame support members provided on the outer frame 6 of the hoisting machine 1 via a wire rope terminal attachment device 8. The wire rope end attachment device is attached to the support plate 7 via a shaft 11.

The control box 9 containing electrical components is attached to the support plate 7, and is provided with a limit lever 10 that operates at the upper limit when the hook block 5 is raised.

Next, details of the wire rope end attachment device 8 will be explained based on FIGS. 1 to 3.

The wire rope terminal attachment device 8 has a shaft 11 attached to the support plate 7 of the outer frame 6, and an inverted U-shaped shaft 11 attached to the shaft 11.
A hanging metal fitting 12 bent into a character shape is suspended so as to straddle the hanging metal fitting 12, and a rectangular notch 15 is formed in the upper center of the hanging metal fitting 12. This hanging fitting 12
A wire rope end attachment sheave 13 is attached with two pins 14, a key plate 17 is attached to prevent the pin 14 from coming off, and this key plate 17 is fixed with bolts 18. Also,
A sheave U groove 24 is formed on the outer periphery of the wire rope end attachment sheave 13, and a socket attachment seat 26 having a vertical groove 25 for inserting a wire rope is formed at one end of the sheave U groove 24. The wire rope 3 is wound around the sheave U groove 24 of the wire rope end attachment sheave 13, and the socket 4 is attached to the socket attachment seat 26 through the vertical groove 25. In addition, a rectangular notch 15 formed in the hanging fitting 12
A clamping bolt 20 is attached by welding or the like to a presser metal fitting 16 having left and right bent portions 16A between the wire rope end attachment sheave 13 and the shaft 11 within the range of . That is, sheave U
The outer diameter of the wire rope 3 in the groove 24 is held down by the holding fitting 16, and the hanging fitting 1 is held at the left and right bent portions 16A.
It is installed across two. Tightening bolt 2
0 is installed through a sheave notch 22 provided on the side surface 13A of the wire rope end attachment sheave 13 and a bolt hole 23 provided at the bottom, and is tightened with a wing nut 21 at the sheave lower surface 13B. It is something.

Next, the operation of the device having the above configuration will be explained.

Wire rope 3 of wire rope terminal attachment device 8
Since the wire rope 3 wound around the sheave U groove 24 is tightened with a presser fitting 16 at the upper center of the sheave 13 near the outlet of the sheave, the hoisting machine 1 cannot be operated from any part other than the wire rope end attachment device 8. Even if the wire rope is pushed up or loosened, the holding fitting 16 prevents the wire rope from loosening, and the wire rope 3 wound around the wire rope end attachment device 8 is maintained in a tight state with respect to the sheave U groove 24. . In addition, when tightening the outer diameter part of the wire rope 3 with the presser fitting 16, the tightening bolt 20 is arranged near the outlet side wire rope 3A, and the structure is such that the tightening force of the bolt 20 is applied almost directly. There is no deformation of the metal fittings 16, and the effect of preventing loosening can be maintained for a long time.
Furthermore, the description will also be made by including a perspective view showing the state in which the socket 4 is pulled out from the wire rope terminal attachment device 8 when inspecting the wire rope terminal section in FIG. 5. Since wear and wire breakage occur during use, periodic inspection is legally required, and the wire rope 3 wound around the wire rope terminal attachment device 8 also requires periodic inspection. . However, such a presser metal fitting 1 for preventing the wire rope from loosening
6 must be constructed so that its tightening mechanism can be easily released during inspection, and must also be able to be tightened easily and reliably after inspection. Considering this point, the bolt 20 provided on the holding fitting 16 is made long enough to protrude from the lower surface of the sheave 13, and the position where the tightening bolt 20 is tightened or released is formed on the sheave lower surface portion 13B integrally with the sheave 13. The structure is such that a wing nut 21 is attached thereto and the wing nut 21 can be operated. Therefore, when inspecting the wire rope end, there is a wing nut 21 on the exterior of the wire rope end attachment device 8, which makes it easy to release the wire rope even when the hoist 1 is installed at a high place. It is possible to solve the problem of reduced durability of the wire rope end portion due to wire rope slack without reducing the wire rope inspectionability of the end attachment device 8, and to improve reliability.

〔Effect of the invention〕

As described above, the present invention provides a wire rope loosening prevention mechanism with a simple structure, thereby extending the life of the wire rope end, and significantly increasing reliability. We can provide the machine.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a wire rope end attachment device in a hoisting machine according to the present invention, FIG. 2 is a sectional view of the wire rope end attachment device, and FIG. 3 is a component part of the wire rope end attachment device. Fig. 4 is a side view of the exterior of the hoisting machine showing the state in which the wire rope terminal is attached, and Fig. 5 is a perspective view of the presser fitting and wing nut of the same wire rope terminal attachment device. FIG. 3 is a perspective view of the wire rope loosened and the socket portion pulled out with the wire rope loosening prevention released. DESCRIPTION OF SYMBOLS 1... Winding machine, 2... Winding drum, 3... Wire rope, 4... Socket, 5... Hook block, 6... Outer frame, 7... Support plate, 8... Wire rope terminal attachment device, 9... Control box, 10... Limit lever, 11...
Shaft, 12... Hanging fitting, 13... Wire rope end attachment sheave, 13A... Sheave side surface, 13B... Sheave bottom surface, 14... Pin, 15... Square notch, 16...
Holding metal fitting, 16A...Bending portion, 17...Key plate, 18...Bolt, 20...Tightening bolt, 21...
Chain nut, 22... Sheave notch, 23... Bolt hole, 24... Sheave U groove, 25... Vertical groove, 26... Socket mounting seat.

Claims (1)

[Scope of Claims] 1. One end of the wire rope is attached to a winding drum, the other end of the wire rope is fixed to a socket, a shaft is attached to a support formed on the outer frame of the hoist, and the shaft is attached to the winding drum. , a socket mounting seat that is hung so as to straddle a hanging fitting made of a steel plate bent into an inverted U shape, and has a U groove on the outer periphery inside the hanging fitting and a groove for inserting a wire rope at one end of the U groove. A wire rope end mounting sheave formed of a wire rope end mounting sheave is attached to the hanging fitting, a wire rope is wound around a U-groove of the sheave, and the socket is mounted on a socket mounting seat. Further, in the hoisting machine in which a wire rope loosening prevention mechanism is applied to the outer circumferential portion of the wire rope wound around the U groove of the sheave, a rectangular notch is formed in the upper center of the hanging fitting, and the notch is formed in the notch. U as a wire rope holding member
A metal fitting bent into a shape is inserted, this metal fitting is attached so as to be in contact with the outer diameter part of the wire rope, a bolt for holding down the wire rope with this metal fitting is formed longer than the outer diameter of the sheave, and the side surface of the sheave is A hoisting machine characterized in that a wire rope loosening prevention mechanism is constructed by arranging the bolt and tightening the bolt at the lower surface of the sheave.