JPS60209497A - Hook 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] (Industrial Application Field) The present invention relates to a hook device used in a hoist, etc., and more specifically, a hook device used in a hoist, etc., and more specifically, a method for changing the number of wires connected to the hook device by disassembling the hook device body and socket. This invention relates to the structure of the hook device, which can be changed without changing the structure.

(Prior art) Generally, when the output of the winch motor is constant, the hook of the hoist uses a pulley mechanism consisting of multiple pulleys in order to increase the curling load and to optimize the hoisting speed. , a wire is suspended between them and wound up.

In such a case, the winding NM and the number of windings by the winch are inversely proportional, that is, if the number of pulleys (moving pulleys) is increased to reduce the winding load acting on each wire, the number of windings (amount) will need to be increased. be. Therefore, in order to reduce the winding load acting on each wire, a large winding drum (of a winch) is required, and a correspondingly longer winding time is required. These are used in cranes, etc., where the winch drum is used in places where there is not much space available and requires a large amount of wire to be taken up by extending the boom, or in hoists, etc., where a wide range of work is required due to the load. This becomes a problem.

One way to solve this problem is to change the number of wires applied to the winding device depending on the winding load or winding time.

However, in the conventional hook device, as shown in FIGS. 1(a) and 1(b), a shaft 2 is installed between the opposing brackets 18, and a pulley 3 is rotatably mounted on the shaft 2. In order to prevent the wire 4 from escaping from the sheave groove of the pulley 3 when mounted, a stopper 5 that covers the part of the pulley 3 where the wire 4 is suspended is fixed to the side surface of the bracket. Therefore, as shown in FIG. 2, whenever the number of wires is changed, the socket 6 (
Wire clip 7, wedge 8, etc. The same applies hereinafter) had to be disassembled and passed through the sheave groove of the pulley 3 (see No. 1131 (a) and (b)). Such work on site is
It was troublesome and time consuming.

(Object of the Invention) The present invention has been made in view of the above-mentioned current situation, and it is possible to change the number of wires to be hung on the hook without disassembling the socket of the fixed part of the wire. The purpose of the present invention is to provide a hook device that has the following features.

(Structure of the Invention) A hook device according to the present invention includes (1) a hook device in which a plurality of pulleys are rotatably mounted on a shaft installed between opposing brackets, in which a wire suspended on the pulleys is prevented from deviating from the hook device; A plurality of stoppers are provided to prevent this from occurring, and at least one of the stoppers is configured to be slidable along the axis.

Further, the hook device is configured such that (2) the slidable stopper is always biased by a spring in a direction to prevent the wire from coming off.

Hereinafter, the present invention will be described in more detail based on examples with reference to the drawings.

FIG. 3 is a front view showing an outline of the entire hook device according to the present invention, FIG. 4 is a left side view of the same, and FIG. 5 is a right partial side view of the same. The same symbols are used for parts common to the above conventional hook device, etc.

In the figure, l is a bracket, 2 is a shaft for mounting and supporting a pulley, 3 is a pulley, 4 is a wire, 5 is a stopper, 9 is a hanging hook, and lO is a shaft for mounting a hanging hook. , 11 is a spring, 12 is a socket holding metal fitting, 1
3 is the web.

- The above-mentioned bracket 1 has left and right brackets IA and IB, and a shaft hole 1a for installing a shaft 2 approximately in the center on both sides, and a shaft 10 for installing a hook below the shaft hole 1a. A shaft hole 1b is formed in the right side bracket IB, and a shaft hole 1c and a socket holding fitting 12 are formed in the right side bracket IB for attaching a shaft 14 for defeating the socket 6. This socket holding fitting 12 is made by fixing two steel plates 12a to a bracket in a substantially V-shape that is wide at the lower end and narrow at the upper end, and is fixed at the mounting shaft 14, and the socket is held in the vertical direction by a wedge action. In addition, two other steel plates 12b are attached on top of the steel plate 12a with a distance approximately equal to the diameter of the wire so that the socket can be fixed in the horizontal direction (front and back direction in FIG. 5). It is configured in such a way that it does not. In addition, the above left and right brackets I
A and IB are integrally connected by two webs 13 in a facing state. The stopper 5 is installed on both the left and right sides of the bracket to prevent the wire 4 suspended in the sheave groove of the pulley 3 from deviating from the wire 41 of the pulley 3. It is opened vertically at the lower and upper ends so as to cover the i-th part, that is, as shown in FIG. The side plate 5a is made of a strip-shaped steel plate and has a shape that forms part of a polygon (circumscribed by a larger imaginary circle by a smaller gap). In addition, as shown in FIGS. 4 and 6, for the right stopper 5B, the side plate 5a is further
The web 5b is fixed to the side plate 5a on the side opposite to the side fixed to the bracket IB, and has a circular hole 5C formed in the center thereof, into which the shaft 2 is inserted. The left stopper 5A is fixed to the bracket LA at the left end side in FIG. 3 so that the wire 4 does not come off.

The other right stopper 5B is partially mounted on the shaft 2 so as to be freely slidable in the axial direction. In FIG. 3, a coil spring 11 is installed between the pulley 3 on the left side and the web 5b of the stopper 5B on the right side, and the stopper 5B on the right side is attached to prevent the wire from coming off. The hook device having the above configuration, which is biased toward the pulley 3 side, allows the number of wires to be easily hung as required, as will be explained below.

That is, when changing from a four-barrel system as shown in Figure 7 to a three-barrel system as shown in Figure 8, first remove the socket 6 (see Figure 2) attached to the boom side, and By moving (sliding) the stopper 5B on the right side of the hook device L in FIG. 3 to the left on the shaft 2 against the spring force of the coil spring 11 (see the two-dot chain line in FIG. 3), A space S through which the wire 4 can pass is provided between the outer circumference of the pulley 3 and the inner surface of the web 13, and the wire 4 is moved between the brackets LA, IB from within the groove of the pulley 3 through the space 81. Next, the socket 6 is passed through the space 82 formed by returning the stopper 5B to its original position, and the socket 6 is moved to the outside of the bracket l. and,
In this way, the socket 6 positioned on the outside is passed through the central space P (see No. 511!J) of the socket holding fitting 12 through the wire portion near the socket portion, and then the wire portion is pulled upward to secure the socket. The wedge portion is fitted into the wedge portion of the socket holding fitting 12, and the lower portion of the shaft 14 is attached and fixed in the circular hole 6a (see FIG. 2) of the socket (see FIG. 5).

By the above method, it is possible to easily change from four wires to three wires. In the above explanation, a specific example was given in which a four-wire wire is changed to a three-wire wire, but the invention is not limited to these. The same applies to changing the number of wires from eight to seven. Furthermore, according to the present invention, it is possible to easily change the number of wires to be hung, such as from eight wires to six wires or four wires, by using a plurality of stoppers that are slidable with the pulleys.

(Effects of the Invention) As described above (according to the hook device according to the present invention),
The number of wires hanging on the hook device can be easily changed without disassembling the socket or the hook device itself, eliminating the need for troublesome work on site and making it easy to adjust the winding speed to an appropriate level. This allows you to streamline your work.

[Brief explanation of drawings]

Figure 1 (a) is a front cross-sectional view showing the overall outline of a conventional hook device, Figure 1 (b) is a left side view of the same, Figure 2 is a front view of the socket at the end of the wire, and Figure 3 is a main 4 is a left side view of the hook device according to the invention, FIG. 5 is a right partial side view of the same, FIG. 6 is a perspective view of the right stopper, and FIG. 7 is a view of the hook device connected to a wire FIG. 8 is a perspective view showing a state in which four wires are hung, and FIG. 8 is a perspective view showing a state in which three wires are hung. l...bracket, 2...shaft, 3...pulley, 4...
...Wire, 5...Stopper, 6...Socket, 7
... wire clip, 8 ... wedge, 9 ... hook, lO ... shaft, 11 ... spring, 12 ...
Socket holding metal fitting, 13...web, 14...shaft. Figure 1 (b) (a) Figure 2 Figure 4

Claims (2)

[Claims] (1) A hook device in which a plurality of pulleys are rotatably attached to a shaft installed between opposing brackets, wherein a stopper is provided to prevent a wire suspended from the pulleys from coming off, and at least one of the stoppers is a hook device that is slidable along said axis. (2) A hook device in which the slidable stopper is attached so as to be biased by a spring in a direction to prevent the wire from coming off.