JPH0642885U - Pulley rope stopper mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] When changing the number of ropes in a crane, the pulley hooks can be easily attached and detached, and the number of ropes can be easily changed. Get a retaining mechanism. [Structure] Equipped with detents 24a and 24b that are attached near the outer periphery of the sheave 21, and fixing means 27 that holds the detents 24a and 24b at a position near the sheave 21. Therefore, even if the rope 2 wound around the pulley has a tip shape larger than the main body of the rope, the pulley can be removed without disassembling the pulley, and the number of ropes can be easily changed. Can be done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hanging hook of a crane equipped with a pulley, and further relates to a rope disengagement mechanism in the pulley.

[0002]

[Prior art]

 In a crane equipped with a hanging hook, hoisting of a rope is performed by hoisting a rope equipped with a hanging hook. To increase the hoisting speed, the hoisting rope should be one rope and the hoisting hook should be directly attached to the end of the rope. Attach and perform lifting work. In addition, when improving the lifting capacity of a crane, the lifting speed may be slower, but in order to reduce the lifting force, the lifting hook may be a moving pulley and the rope may be two or more ropes.

The operation of the crane with one rope and the crane with two ropes will be described with reference to FIGS. 4, 5, 6, and 7. Fig. 5 shows the crane with one rope. In this crane, the hanging hook 3 is rounded at its tip as shown in Fig. 7, and the rope 2 is kept in an annular shape by a fixture 6. It is attached by inserting the holding pin 3a of the suspension hook 3 into the holding hole 2a at the tip. Then, the rope 2 is guided by the boom 1 which can be freely extended and retracted, and hoisted by the winch 5 attached to the extension of the rope 2 and rewound, so that the object hung on the hanging hook 3 is vertically moved. You can move.

Further, FIG. 6 shows a crane in the case of two ropes in which the hanging hook portion is a moving pulley. In this crane, the tip of the rope 2 is fixed near the tip of the boom 1 of the crane by rope fixing pins 1a, and the rope 2 is hooked by a pulley suspension hook 4 whose suspension hook is a moving pulley. Then, the object hung on the pulley hanging hook 4 moves up and down as in the case of the one-line crane, but since the hanging hook 4 is a moving pulley, the lifting capacity of the crane is improved, but the lifting capacity is increased. The speed is slower than that of a single rope.

Here, the structure of the pulley suspension hook 4 will be described with reference to FIG. In the pulley suspension hook 4, the sheave 9 and the hook 11 are sandwiched between two support plates 10a and 10b, and the sheave 9 is rotatably mounted by the fixing pins 7, 8 and 12, and the hook 11 is swayable. ing. Here, the fixing pin 8 is provided close to the outer week of the sheave 9 so as to prevent the rope 2 wound around the sheave 9 from coming off the sheave 9, so as to prevent the rope from coming off.

[0006]

[Problems to be solved by the device]

 However, in the case of a crane equipped with a pulley suspension hook as described above, it is required to change the hoisting speed or the number of ropes in order to change the hoisting capacity according to the usage situation of the crane. In this case, the pulley must be removed and the hook replaced. However, since the tip shape of the rope is annular for fixing the hook or to the boom and the tip shape is larger than the diameter of the rope, if the pulley suspension hook is already attached, The rope cannot be pulled out between the sheave and the fixing pin for preventing the rope from coming off simply by removing the holding pin or the rope fixing pin of the boom. For this reason, there was a problem that it was difficult to remove the pulley suspension hook from the rope and it was difficult to change the number of ropes.

The present invention has been made in view of such a problem, and when changing the number of ropes in a crane, the pulley suspension hook can be easily attached to and detached from the rope. It is an object of the present invention to provide a rope disengagement mechanism for pulleys which is configured so that the number of ropes can be easily changed.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the rope disengagement mechanism of a pulley of the present invention, a support member that rotatably holds the sheave is provided close to the outer periphery of the sheave to prevent the rope hung around the sheave from coming off. To prevent it from coming off. This detent has a fixing means that allows it to be held in a position close to the sheave, and by attaching the detent to the support member so that it can swing, an opening away from the sheave when the fixing by the fixing means is released. It is possible to move to the position. Further, the retaining member may be detachably attached to the support member so that it can be removed at a position away from the sheave when the fixing by the fixing means is released.

[0009]

[Action]

 According to such a rope disengagement preventing mechanism for the pulley, the rope is not disengaged from the sheave during use of the sheave due to the disengagement stop fixed to the support member, and the work safety can be ensured. On the other hand, by removing the stopper from the support member, the rope can be easily removed from the sheave. Therefore, it is possible to remove the pulley without disassembling the pulley, and it is easy to change the number of ropes.

[0010]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, FIGS. 1 and 2 show a pulley suspension hook 20 equipped with a rope disengagement mechanism for a pulley according to the present invention. In this pulley suspension hook 20, the sheave 21 and the hook 23 are sandwiched between two support plates 28a and 28b, and the sheave 21 is rotatable by the fixing pins 26 and 22, and the hook 23 swings. It is attached freely. Further, the split rope detachment stoppers 24a and 24b are also attached by the attachment pins 25 so as to be sandwiched between the attachment plates 28a and 28b. Each of the stoppers 24a and 24b is swingably supported by a mounting pin 25, and is attached to the outer periphery of the sheave 21 so as to open in two halves as shown by a chain double-dashed line in FIG.

The detents 24 a and 24 b are formed by bending a plate material having a width substantially equal to the thickness of the sheave 21 into an arc larger than the outer diameter of the sheave 21, and swinging one end of the plate member 25 to the mounting plate 28 with a pin 25. It is freely attached and the other end is locked by B pin 27 so that the two stoppers do not move. In the stoppers 24a and 24b, the outer circumference of the sheave 21 is arranged on the B pin 27 side so that the distance from the outer circumference is smaller than the diameter of the rope 2 so that the rope 2 does not come off from the sheave 21. Can be installed close to. Further, the mounting pin 25 side is located at a position farther from the outer periphery of the sheave 21 so that a gap Lb wider than the dimension La of the tip shape of the rope 2 can be formed between the outer periphery of the sheave 21 and the mounting pin. Install each by.

In the pulley suspension hook 20 having the retaining mechanism thus configured, when the rope 2 is hung around the sheave 21 and used, the two retaining stoppers 24 a and 24 b are attached to the B pin. Locking with 27 prevents the rope 2 from coming off the sheave 21 during use, which is safe. When the rope 2 is removed from the pulley suspension hook 20, the B pin 27 is removed and the detents 24a and 24b are opened left and right as shown by the chain double-dashed line, which is generated between the sheave 21 and the mounting pin 25. Since the tip of the rope 2 can be passed through the gap Lb, the rope 2 can be pulled out from the pulley suspension hook 20. Therefore, the number of ropes in the crane can be easily changed.

Next, another embodiment according to the present invention will be described with reference to FIG. In the pulley suspension hook 40 shown in FIG. 3, the integral rope slip-out prevention member 42 is formed by bending a plate material having a width almost equal to the thickness of the sheave 41 into an arc larger than the outer diameter of the sheave 41, and attaching the hole 42a. Is provided. Then, in order to prevent the rope 2 from coming off the sheave 41, it is sandwiched between the mounting plates 43 close to the outer circumference of the sheave 41 so that the distance from the outer circumference of the sheave 41 is smaller than the diameter of the rope 2. It is detachably attached by the attachment pin 45.

In the pulley hanging hook 40 having the retaining mechanism thus configured, when the rope 2 is wound around the sheave 41 and used, the retaining stopper 42 is fixed by the mounting pin 45. This prevents the rope 2 from coming off the sheave 41 during use. When the rope 2 is to be removed from the pulley 40, the attachment pin 45 is removed and the stopper 42 is removed, so that there is no obstacle at a position close to the outer periphery of the sheave 41, so the rope is pulled out from the pulley suspension hook 40. be able to.

[0015]

[Effect of device]

 As described above, the rope retainer device of the pulley of the present invention holds the retainer at a position close to the sheave and the retainer that is swingably attached to the support member of the sheave in the vicinity of the outer periphery of the sheave. It is equipped with fixing means. By releasing the fixing means, the detent moves to the open position, so that the rope can be pulled out. Therefore, even if the rope wound around the pulley has a tip shape larger than the main body of the rope, the pulley can be removed without disassembling the pulley, and the number of ropes can be easily changed. It can be carried out. The detachment stopper may be detachably attached to the support member so that it can be detached from the support member.

[Brief description of drawings]

FIG. 1 is a side view of a pulley suspension hook including a rope stopper device for a pulley according to the present invention.

FIG. 2 is a side view of a pulley suspension hook including a rope stopper device for a pulley according to the present invention.

FIG. 3 is a side view of a pulley suspension hook including a rope detachment device for a pulley according to another embodiment of the present invention.

FIG. 4 is a side view of a conventional pulley suspension hook.

FIG. 5 is a side view of the crane when the rope has one rope.

FIG. 6 is a side view of the crane when the rope has two ropes.

FIG. 7 is a side view of a rope used in the crane.

[Explanation of symbols]

 1 crane boom 2 rope 3 suspension hook 4 conventional pulley suspension hook 5 winch 21 sheave 23 hooks 24a, 24b split type rope retainer 25 mounting pin 27 B pin 28 mounting plate 42 integrated rope retainer

Claims (2)

[Scope of utility model registration request] 1. A sheave, a support member for rotatably holding the sheave, a fixed position close to the outer periphery of the sheave and an open position separated from the sheave for preventing the rope wound around the sheave from coming off. And a fixing means for holding the detent in a position close to the outer periphery of the sheave, the detent being pivotally attached to the support member in a swingable manner. Rope disengagement prevention mechanism. 2. A sheave, a support member for rotatably holding the sheave, and a detachable member from the support member at a fixed position close to the outer periphery of the sheave for preventing the rope wound around the sheave from coming off. With a stopper that can be attached,
A rope disengagement prevention mechanism for a pulley, comprising: fixing means for holding the disengagement stop at a position close to the outer circumference of the sheave.