JPH09249392A - Nipping preventer of pulley - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent any contact between a control member and a rope from occurring by attaching a plate to the other side of a supporting frame so as to make a wheel come to the inward of a nipping preventive member. SOLUTION: A pulley is equipped with a wheel 1 to be formed with a semicircular recess, receiving a rope 4, on the circumference and a hook 3 supporting this wheel 1 free of rotation by a shaft 2E, respectively. In addition, a hinge being free of opening or closing for hitching the wire rope 4 on the recess of the wheel 1 is installed at the one side of a supporting frame 2. A nipping preventive member 6 is clamped tight to a plate 5 at an interval of thickness or so of the plate 6 and the wheel 1. Likewise the nipping preventive member 6 and the plate 5 is clamped tight to the other side of the supporting frame 2 in use of a U bolt 7. Doing like this, a noncontact state is maintainable irrespective of any variation in the extension direction of the rope wraped on the wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulley pinching prevention device used when a guide rail of an elevator or other object is pulled up by a wire.

[0002]

2. Description of the Related Art Conventionally, a device of this type has been used as a practical device.
As described in Japanese Patent Laid-Open No. 116695, a pair of blocking members rotatably supported on a wheel shaft is provided, and a through hole and a notch continuous with the through hole are provided in both of the blocking members.
A structure has been proposed in which a rope to be hung on a wheel is passed through a through hole through a notch.

[0003]

In the above-mentioned conventional device, although the stopping member also rotates around the wheel in accordance with the change of the extending direction of the rope, the stopping member and the rope come into contact with each other and the rope is damaged. If the rope life is shortened by wearing it, or by abrading the rope and the stop member, wear will be severe and the wire rope will be worn in a short time, especially when lifting heavy objects using a wire rope or lifting to a high position. May become unusable.

A main object of the present invention is to provide a device for preventing pinching of a pulley which can maintain a non-contact state regardless of a change in an extension direction of a rope hung on a wheel.

Another object of the present invention is to provide a device for preventing pinch of a pulley which can be easily attached and detached.

[0006]

An object of the present invention is to provide a wheel having a semicircular recess formed on its outer periphery for receiving a rope, and a support frame arranged to sandwich the wheel to rotatably support the wheel. In a device for preventing pinch of a pulley having a hook attached to one side of a support frame, a plate;
The rod-shaped member is fixed to the plate with a space, the plate is formed into an arc shape on the plate, and the plate is placed so that the wheels are located inside the pinch-preventing member. This is achieved by a configuration including a coupling means attached to the other side of the support frame.

With the above-mentioned structure, the pinch prevention members are located on both sides of the wheel and are parallel to the recesses, so that the rope is in contact with the pinch prevention members even if the extension direction of the rope changes. There is no such thing. Further, even if the hand of the worker approaches the pulley, the hand is prevented from being pinched and the back is prevented by the member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view with a front support frame removed, and FIG. 2 is a side sectional view taken along the chain line AA 'in FIG.

The pulley is a wheel 1 having a semicircular recess 1A for receiving a wire rope or a rope 4 on its outer periphery, and a hook provided on both sides of the wheel 1 and rotatably supported by a shaft 2E. 3 and one part of the support frame 2 is openable and closable by a hinge 2B so that the wire rope 4 can be hung on the recess 1A of the wheel 1. The reference numeral 2D indicates the opening / closing section 2A.
It is a lock fitting after closing. The pinch prevention device is fixed to the plate 5 by welding at an interval of about the thickness of the plate 5 and the wheel 1 (similar to the interval of the support frame 2), and is formed by forming a round bar into an arc shape. The support member 2 is provided with the prevention member 6 and the plate 5 to which the prevention member 6 is pinched.
On the other side, the U-bolt 7 is fixed by using the bolt 2B of the support frame 2.

Next, the procedure for installing the pinch prevention device will be described.

The U-bolt 7 is previously engaged with the bolt 2C, and the plate 5 is brought into contact with the other side of the support frame 2 in a state where the wheel 1 of the pulley is positioned inside the pinch prevention member 6. And insert the end of U bolt 7 into the hole of plate 5,
The nut 7A is screwed into the end of the U bolt and tightened to complete the installation of the pinch prevention device.

Since the wire rope 4 has the above-described structure, the wire rope 4 does not come into contact with the pinch prevention member 6 even if the extending direction of the wire rope 4 changes (changes from a solid line to a dotted line). .

Further, since the pinching prevention member 6 is a round bar, even if the wire rope 4 comes into contact with it, there is almost no damage to the wire rope 4.

Further, since the nut 7A may be screwed in with a U bolt and tightened or loosened and removed, the pulley of the pinch prevention device can be easily and quickly attached and detached.

Further, since the anti-jamming member 6 surrounds a region of the wheel 1 which is about a half circumference or more, it is highly effective in preventing the wheel 1 from being caught.

[0017]

As described above, according to the present invention, the non-contact state can be maintained regardless of the change in the extension direction of the rope hung on the wheel.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

[Explanation of symbols] 1 wheel 2 support frame 3 hook 4 wire rope 5 plate 6 pinch prevention member 7 U bolt

Claims (2)

[Claims] 1. A wheel having a semicircular recess formed on its outer periphery for receiving a rope, a support frame arranged so as to sandwich the wheel and rotatably supporting the wheel, and a hook attached to one side of the support frame. In a device for preventing pinch of a pulley having a plate, a plate, a plate-like rod-shaped member fixed to the plate with an interval, a pinch-preventing member formed in an arc shape on the plate, and a pinch-preventing member of the pinch-preventing member. An apparatus for preventing pinch of a pulley, comprising: a connecting means for attaching the plate to the other side of the support frame so that the wheel is located inside. 2. The pinch prevention device for a pulley according to claim 1, wherein the pinch prevention piece has a substantially circular cross section.