JP5578840B2 - Pulley with protective equipment - Google Patents

Description

  The present invention relates to a pulley, and more particularly, to a pulley provided with a protective device for preventing accidents in which fingers or the like are caught between the pulley and a wire rope.

  In power transmission work, a disk that is rotatably mounted on a shaft supported between a pair of opposing side plates and that has a groove formed on the outer peripheral surface, and a hanging tool attached to the side plate are provided on the outer peripheral surface of the disk. A pulley that is used by laying a wire rope is often used.

  In particular, in assembling a power transmission tower, it is used for lifting the components of the power transmission tower. A pulley suspension is attached to the arm of the power transmission tower in the middle of assembly, and an article such as a power transmission tower arm is suspended from one end of the wire rope, and the other end is wound up by a ground hoisting machine via the pulley. The worker receives the components of the power transmission tower on the arm of the power transmission tower that is being assembled.

  At this time, the operator places his / her hand on the wire rope to guide the lifted article, and winding is performed by the ground hoisting machine even during the guidance. For this reason, the hand on the wire rope was caught in the pulley before the worker noticed, which could lead to a serious accident. In particular, because it is a work at a high place, workers need to pay attention to their own safety in a poor footing, and they often do not pay attention to the hands on the wire rope. There was an endless accident.

  Moreover, there were only alerts etc. as accident prevention measures, and no specific measures were taken.

  The problem to be solved by the present invention is to provide a pulley that is caught and can prevent an accident.

In order to solve the above-mentioned problem, the present invention comprises a disk that is rotatably mounted on a shaft supported between a pair of opposing side plates and has a groove formed on the outer peripheral surface, and a hanging tool attached to the side plate. In a pulley that is provided with a wire rope spanning the outer peripheral surface of the disk, a protection made of a metal wire having a straight part with a set length and a spiral part that is connected to the straight part and spirally wound a plurality of times. A straight portion of the protective device is rockably locked in a mounting hole formed in the side plate at the tip, and the spiral portion is formed in a spiral pitch and a spiral diameter that can be wound around a wire rope, The attachment hole is provided in the vicinity of a hanging tool of the side plate corresponding to a contact point with the disk in a state where one side of the wire rope spanned over the disk is horizontally wound, and the straight portion is the straight shape Around the mounting hole The spiral portion is formed with a length that does not interfere with the side plate when swung, and the spiral portion is formed with a length longer than the straight portion in the length direction of the straight portion. Features.

  According to the present invention, even if the operator's hand hung on the wire rope is guided in the direction of the pulley as it is wound, the operator notices and releases the hand from the wire rope by touching the spiral portion of the protective equipment. be able to. Further, since the spiral portion of the protective equipment is easily visible to the worker, the worker can notice the approach to the pulley earlier. Furthermore, since the protective device is formed of a spiral metal wire, the state of whether or not the outer surface of the wire rope is damaged is visually observed just before the wire rope is wound around the pulley. be able to. The lengths of the straight part and the spiral part are preferably set according to the size of the pulley disk and side plate. Moreover, it is preferable to set the length of the straight portion so that the spiral portion does not interfere with the side plate. The pulley may be a fixed pulley or a moving pulley.

  Further, since the protective device is to be locked in the mounting hole formed on the side plate of the pulley, it is only necessary to form the mounting hole on the side plate of the existing pulley, which is highly versatile and easy to install. is there.

  The protective device is attached by an operator, for example, by locking one end of a metal wire bent into a U shape by rotating it through a mounting hole of a pulley, and further winding the spiral portion around a wire rope. . The spiral diameter is preferably determined from the thickness of the wire rope so that the operator can manually wind the spiral portion around the wire rope. The spiral pitch should just be a grade which can visually recognize a wire rope. In addition, it is still more preferable that a protection tool with a diameter of about 3 mm is easy to handle, and the spiral diameter is about three times the diameter of the wire rope.

In this case, the protector is provided in a pair facing the position away from the outer periphery of the disk, and the mounting hole in which the straight part of the protector is locked corresponds to the position of the wire rope wound around the disk. , in particular of the side plate, it is provided in vicinity of a contact point between the wire rope and the disk.

  ADVANTAGE OF THE INVENTION According to this invention, the pulley which can be caught and can prevent an accident can be provided.

(A) is a side view of the embodiment of the pulley before having the protector of the present invention, (b) is a front view of the embodiment of the pulley before having the protector of the present invention, (c) ) Is a block diagram of the protective equipment of the present invention. (A) is a side view of the Example of the pulley provided with the protector of this invention, (b) is a front view of the Example of the pulley provided with the protector of this invention. It is a front view of the Example which spreads and uses the angle of the wire rope of the pulley provided with the protector of this invention.

  Hereinafter, an embodiment of a pulley provided with the protector of the present invention will be described with reference to the drawings. As shown in FIGS. 1A and 1B, the pulley 2 of this embodiment is rotatably mounted on a pin 6 supported between a pair of opposed side plates 4 and has a groove formed on the outer peripheral surface. And a suspension 10 attached to the side plate 4 so as to face a position away from the outer periphery of the disk 8, and is configured such that the wire rope 12 is stretched over the outer peripheral surface of the disk 8. . The total length of the pulley 2 is about 300 mm, the lateral width is about 115 mm, and the diameter of the wire rope 12 is about 10 mm.

  Further, the pulley 2 is provided with a stop hook 3, and when the stop hook 3 is removed, an opening 7 is opened with the base end 5 as an axis, and a wire rope 12 is inserted from there to the disk 8. In addition, a roller 9 supported between the side plates 4 is provided at an end of the side plate 4 opposite to the lifting tool 10 and is fixed to the side plate 4 with bolts and nuts 11.

  Here, the configuration and operation that characterize the present embodiment will be described. As shown in FIG. 1 (c), the feature of this embodiment is a straight portion 14 having a set length (90 mm in this embodiment), and a spiral that is connected to the straight portion 14 and spirally wound a plurality of times. This is a protector 18 (350 mm in this embodiment) made of a metal wire having a portion 16 (260 mm in this embodiment).

  The length of the straight portion 14 is set such that the spiral portion 16 does not interfere with the side plate 4. The metal wire of the protector 18 is stainless steel and has a diameter of about 3 mm.

  Further, the straight portion 14 of the protector 18 is rockably locked in a mounting hole 20 formed in the side plate 4 at the tip, and the spiral portion 16 is formed in a spiral pitch and a spiral diameter that can be wound around the wire rope 12. Has been. The spiral diameter of the spiral portion 16 of this embodiment is about 25 mm corresponding to about three times the diameter of the wire rope 12, and the spiral pitch is about 30 mm. In FIG. 2, the mounting holes 20 are respectively provided in the two side plates 4.

  The attachment hole 20 is formed in the side plate 4 so as to correspond to the position of the wire rope 12 wound around the disk 8. In the present embodiment, the side plate 4 is provided in the vicinity of the hanging tool 10.

  The protector 18 is attached by locking an end of the metal wire bent into a U shape by rotating it through the attachment hole 20 by the operator, and winding the spiral portion 16 around the wire rope 12. .

  The pulley 2 to which the protective equipment 18 is attached in this way is used for lifting the components of the power transmission tower in assembling the power transmission tower. The suspension tool 10 of the pulley 2 is attached to the armature of the power transmission tower in the middle of assembly, articles such as the armature of the power transmission tower are suspended from one end of the wire rope 12, and the other end is lifted by the ground hoisting machine via the pulley 2. Wind up. The worker receives the components of the power transmission tower on the arm of the power transmission tower that is being assembled. At this time, the operator places his / her hand on the wire rope 12 to guide the lifted article, but winding is performed by the ground hoisting machine even during the guidance. For this reason, it is necessary for the worker to pay attention to his / her safety while having a poor footing, and to be careful not to get his hand on the wire rope 12 involved.

  Here, according to the present embodiment, even when the operator's hand hung on the wire rope 12 is guided in the direction of the pulley 2 as it is wound, the operator touches the spiral portion 16 of the protective device 18 so that the operator can You can notice and release your hand from the wire rope 12. Further, since the spiral portion 16 of the protective device 18 is easily visible to the operator, the operator can notice the approach to the pulley 2 earlier. Furthermore, since the protector 18 is formed of a spiral metal wire, the outer surface of the wire rope 12 is not damaged as viewed from the spiral portion 16 immediately before the wire rope 12 is wound around the pulley 2. Can be visually recognized.

  Moreover, since the protector 18 is latched by the attachment hole 20 formed in the side plate 4 of the pulley 2, what is necessary is just to form the attachment hole 20 in the side plate 4 of the existing pulley 2, and versatility. And is easy to install.

  Moreover, as shown in FIG. 3, it can respond also when using it in the state which made the angle between the wire ropes 12 large.

  Although the present embodiment has been described above, the present invention is not limited to these, and can be applied by appropriately changing the configuration. For example, the pulley 2 may be a fixed pulley or a moving pulley.

  Further, a plurality of mounting holes 20 may be provided, and the hole for locking the protector 18 may be changed depending on the use state of the pulley 2. Moreover, the magnitude | size of the pulley 2 and the protector 18 is not restricted to a present Example, It can change suitably. Further, the rotation direction of the spiral may be either clockwise or counterclockwise.

2 pulley 4 side plate 6 pin 8 disk 10 lifting tool 12 wire rope 14 straight part 16 spiral part 18 protective equipment

Claims (2)

A disk that is rotatably mounted on a shaft supported between a pair of opposing side plates and has a groove formed on the outer peripheral surface thereof, and a hanging tool attached to the side plate, and a wire rope on the outer peripheral surface of the disk In pulleys that are used over
A protective device comprising a metal wire having a straight portion having a set length and a spiral portion that is connected to the straight portion and spirally wound a plurality of times, the tip of the straight portion of the protective device has the side plate The spiral portion is formed to have a spiral pitch and a spiral diameter that can be wound around the wire rope.
The mounting hole is provided in the vicinity of the suspension of the side plate corresponding to the contact point with the disk in a state where one side of the wire rope spanned over the disk is horizontally wound ,
The straight portion is formed with such a length that the spiral portion does not interfere with the side plate when the straight portion is swung around the mounting hole.
The spiral portion is provided with a protector, wherein the spiral portion is formed in a length longer than the straight portion in the length direction of the straight portion.   The pulley provided with the protector according to claim 1, wherein the protector is provided in a pair so as to face a position away from the outer periphery of the disk.

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