JPH0833726A - Safety belt - Google Patents

Abstract

PURPOSE:To improve the convenience of use and to improve functional performance by providing a means for engaging a pole with the teech of a ratchet wheel when a flat belt used as a life line of a safety belt is drawn from a take-up reel installed on a waist belt. CONSTITUTION:When a waist belt 1 is wound round the body of a worker before work, a flat belt 8 can be taken up on a rotator 12 of a take-up reel 9. A handle 33 is operated on a strut 7 such as a mast or the like to oscillate a spring 28 to a designated position and engage the same with a stopper 34, so that the handle 33 and the spring 28 can be held in designated positions. At this time, a pole 24 is held in a position separate from the teeth 25 of a ratchet wheel 23. Accordingly, when the flat belt 8 is pulled, a shaft 11 and the rotator 12 are rotated to draw the flat belt 8 from the take-up reel 9. Accordingly, the flat belt 8 is wound round the strut 7 and a hook 5 can be engaged with the metal ring of the waist belt 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt used at a work site at a high place such as a construction site.

[0002]

2. Description of the Related Art A safety belt having a structure shown in FIG. 11 and FIG. 12 is used as a safety belt used at a work site at a high place such as a construction site. This belongs to the Class C safety belt of the Ministry of Labor safety belt standard, has a body belt 1 and a lifeline, and a plurality of metal rings 2 and 3 are provided on the body belt 1, and the body belt 1 is each metal ring 2 and 3. Has been passed through. The lifeline consists of a rope 4 with a diameter of 10 mm or 16 mm,
A hook 5 is provided at its tip, and the rope 4 is chucked by a chuck metal fitting 6, and the chuck metal fitting 6 is attached to the metal ring 2 of the body belt 1. Therefore, the torso belt 1 can be wrapped around the worker's body, the rope 4 can be wound around the pole 7 such as an electric pole, and the hook 5 can be engaged with the metal ring 3 of the torso belt 1, whereby the rope 4 Can support the body.

However, the rope 4 of this safety belt
For this, it must be wound around a pole 7 such as a telephone pole, and it is necessary to use a considerably long rope 4 as the rope 4. Therefore, before the work, when the torso belt 1 is wrapped around the worker's body, the rope 4 has conventionally been troublesome to handle, and there is a problem in that the usability is poor. Furthermore, in order to properly support the body of the worker by turning the rope 4 around the pole 7 such as a utility pole, it is necessary to adjust the length of the rope 4 appropriately to correspond to the thickness of the pole 7. It is difficult to adjust the length of rope 4 on 7.

[0004]

OBJECTS OF THE INVENTION Accordingly, the present invention provides a safety belt of a type in which a lifeline is wound around a pole such as a utility pole.
Its purpose is to make it easy to use and enhance its functionality, and to allow the length of the lifeline to be easily adjusted, even on the stanchions, so that the operator's body can be properly supported. It was made as.

[0005]

According to the present invention, the flat belt is used as the lifeline of the safety belt, the take-up reel is attached to the body belt, the flat belt is wound around the rotating body of the take-up reel, and the metal ring is It is provided on the belt, and a hook is provided on the tip of the flat belt. Further, elastic means is provided on the take-up reel and acts on the rotating body, and the rotating body is elastically biased in the winding direction of the flat belt. Further, a ratchet wheel and a pawl are provided on the take-up reel, the ratchet wheel is concentrically arranged on the rotating body, integrated with the rotating body, and the pawl can advance toward the teeth of the ratchet wheel.
Further, elastic means are provided on the take-up reel and act on the paw to elastically bias the paw toward the teeth of the ratchet wheel, so that when the flat belt is pulled out from the take-up reel, the paw engages the teeth of the ratchet wheel. This prevents the rotation of the rotating body. In addition, a handle is provided on the take-up reel and is connected to the paw so that the handle operates the paw to keep it away from the ratchet wheel teeth and prevent the paw from engaging the ratchet wheel teeth. You can Therefore, the flat belt can be pulled out from the take-up reel, and the flat belt can be rotated around a pole such as an electric pole, and the hook can be engaged with the metal ring of the trunk belt, so that the flat belt can support the body of the worker.

[0006]

Description of Embodiments Embodiments of the present invention will be described below.
FIG. 1 shows an embodiment of the present invention. This is the same type of safety belt as the safety belt of FIG.
A plurality of metal rings 2 and 3 are provided on the body belt 1, and the body belt 1 is passed through the metal rings 2 and 3. Further, a flat belt 8 is used as a lifeline, a take-up reel 9 is attached to the metal ring 2 and attached to the body belt 1. The take-up reel 9 is for taking up the flat belt 8.

As shown in FIGS. 2 and 3, the take-up reel 9 has a frame 10, a shaft 11 and a rotating body 12. The frame 10 has a rectangular shape, and the end cover 1
3 and the side cover 14. The shaft 11 is inserted into the through hole 15 of the frame 10, penetrates the frame 10, and is rotatably supported. Rotating body 1
2 is accommodated in the frame 10, is arranged concentrically with the shaft 11, is integrated with the shaft 11, and the flat belt 8 is guided into the frame 10 and wound around the rotating body 12. Furthermore, the shock absorber 16 is attached to the flat belt 8.
Is provided, and the hook 5 is provided at the tip of the flat belt 8. The hook 5 is similar to the hook of FIG. 12, and can be engaged with the metal ring 3 of the body belt 1.

Regarding the flat belt 8 and the hook 5 of this safety belt, as shown in FIG. 5, abrasion-resistant durable resin such as nylon resin is extruded into a tubular shape having an elliptical cross section in an extruder, and this is constant. It is cut to length, which forms the protective tube 17. The protective tube 17 has a wall thickness of 0.5 mm to 1.8 mm. After that, the protection tube 17 is bent by a bending jig and heat treatment, and the flat belt 8 is passed through the protection tube 17. Flat belt 8 is 20m wide
m, the thickness is 2 mm, and the protective tube 17 also has an inner hole having a corresponding width and height. After that, as shown in FIG. 4, the flat belt 8 and the protective tube 17 are passed through the through holes 18 of the hook 5, the flat belt 8 is superposed on the doubly, and this is sewn with a sewing thread. Therefore, the protection tube 1
The flat belt 8 can be protected by 7. As shown in FIG. 6, before passing the flat belt 8 into the protective tube 17, notches 19 may be formed from both ends of the protective tube 17 so that the flat belt 8 can be passed smoothly.

Further, in this safety belt, elastic means is provided on the take-up reel 9 and acts on the rotating body 12. In this embodiment, the spiral spring 20 is used as the elastic means.
The spring 20 is covered with a spring cover 21 on the outer side of the frame 10, and is attached to the outer side surface of the frame 10. The inner end of the spring 20 engages with one end of the shaft 11 and the split groove 2
2, and the outer end is engaged with the protrusion of the spring cover 21. Therefore, the spring 20 acts on the shaft 11 and the rotating body 12, the shaft 11 and the rotating body 12 are elastically biased in the winding direction of the flat belt 8, and the flat belt 8 is kept in the state wound around the rotating body 12. Be drunk

Further, the take-up reel 9 has a ratchet wheel 23 and a pawl 24, teeth 25 are formed on the ratchet wheel 23, the ratchet wheel 23 is housed in the frame 10 and arranged concentrically with the rotating body 12,
It is integrated with the rotating body 12. In this embodiment, a pair of ratchet wheels 23 are provided on both sides of the rotating body 12.
Are arranged concentrically with the rotating body 12 and are integrated with the rotating body 12. Further, the bush 26 is fitted in the center holes of the rotating body 12 and the ratchet wheel 23, the shaft 11 is fitted in the bush 26, and is integrated with the rotating body 12 and the ratchet wheel 23. Between each ratchet wheel 23, The flat belt 8 is wound around the rotating body 12. The pawl 24 is for engaging with the teeth 25 of the ratchet wheel 23, has both ends with reduced height, is housed in the frame 10, and both ends are inserted into the notches 27 of the frame 10. The notch 27 is fan-shaped, and both ends of the pawl 24 can be swung in the notch 27, and the pawl 24 can be swung toward the teeth 25 of the ratchet wheel 23 and moved forward.

Further, elastic means is provided on the take-up reel 9 and acts on the paw 24. In this embodiment, the coil spring 28 is used as the elastic means. The spring 28 has both ends 29 and 30 extending in the radial direction, and is provided on the outer surface of the frame 10. Further, one end of the pawl 24 protrudes outside the frame 10 and the frame 1
On the outside of 0, the screw 31 is inserted into the central hole of the spring 28, fitted and fixed in the through hole of the frame, the spring 28 is supported by the screw 31, and one end 29 of the screw 31 is engaged with the protruding end of the pawl 24. I am fit. Therefore, the spring 28 can be caused to act on the pawl 24, and the pawl 24 can be elastically biased toward the teeth 25 of the ratchet wheel 23. Besides, in this embodiment, the pole anchor 32 is housed and attached in the frame 10. As will be described later, the Paul anchor 32 is for receiving a force applied to the Paul 24 and supporting the force.

Further, a handle 33 is provided on the take-up reel 9 and is connected to the pawl 24. In this embodiment, a handle 33 is provided on the other end 30 of the spring 28 outside the frame 10, and
The handle 33 and the pawl 24 are connected via 8. Furthermore, as shown in FIG. 7 and FIG.
4 is provided on the outer side surface of the frame 10 and is fixed thereto, and the handle 28 operates the spring 28 and the pawl 24 to swing the spring 28 around the screw 31. In the positions shown in FIGS. Edge 30
Can be engaged with the stopper 34.

Therefore, in this device, before work,
When the torso belt 1 is wound around the body of the worker, the flat belt 8 can be wound around the rotating body 12 of the winding reel 9,
Its ease of use and high functionality. Then, on the support pole 7 such as an electric pole, the handle 28 is operated to operate the spring 28 and the pawl 24 to move the spring 28 to the position shown in FIG.
The handle 33 and the spring 28 can be maintained in that position by swinging them to the position of and engaging the stopper 34.
It is kept in a position away from 5 and does not engage the teeth 25 of the ratchet wheel 23. Therefore, when the flat belt 8 is pulled by hand, the shaft 11 and the rotating body 12 are rotated by the tension, and the flat belt 8 can be pulled out from the take-up reel 9. Therefore, the flat belt 8 can be wound around the support pole 7 such as an electric pole, and the hook 5 can be engaged with the metal ring 3 of the trunk belt 1.

Thereafter, the handle 28 operates the spring 28 and the pawl 24 to move the spring 28 to the position shown in FIG.
The handle 33 and the spring 28 can be maintained in that position by causing the handle 28 and the spring 28 to engage with the pawl 24 when the pawl 24 faces the teeth 25 of the ratchet wheel 23. Is elastically biased. Therefore, when the flat belt 8 is pulled out from the take-up reel 9, the pawl 24 engages with the teeth 25 of the ratchet wheel 23, which causes the shaft 11 to move.
And the rotation of the rotating body 12 is blocked, and the pole anchor 32
Receives and supports the force applied to the pawl 24, and the flat belt 8 cannot be pulled out any more. Therefore, the flat belt 8 can support the operator's body and prevent a fall.

Furthermore, even on a pole 7 such as a telephone pole,
When the flat belt 8 is loosened, the shaft 11 and the rotating body 12 are rotated by the spring 20, and the flat belt 8 can be wound up arbitrarily. The flat belt 8 can be arbitrarily pulled out by operating the spring 28 and the pawl 24 with the handle 33 and swinging them to the position shown in FIG. Therefore, the length of the flat belt 8 can be easily adjusted to correspond to the thickness of the support column 7, and the body of the worker can be accurately supported.

As shown in FIG. 9 and FIG.
4 is provided with a protrusion 35 and teeth 25 of the ratchet wheel 23 are provided with recesses 36 so that the protrusions 35 are fitted into the recesses 36 of the ratchet wheel 23 when the pawl 24 is engaged with the teeth 25 of the ratchet wheel 23. Then, when the flat belt 8 is loosened, even if the spring 20 acts on the shaft 11 and the rotating body 12,
It is also possible to prevent the rotation of the rotating body 12 by the 4 and the ratchet wheel 23 so that the flat belt 8 is not wound.

[0017]

As described above, according to the present invention, the flat belt 8 can be wound around the rotating body 12 of the take-up reel 9 when the trunk belt 1 is wound around the body of the worker before the work. It is easy to use and has high functionality. Further, the flat belt 8 is pulled out from the take-up reel 9, and is rotated around the support pole 7 such as a utility pole, so that the flat belt 8 can support the body of the worker. Even on the support pole 7 such as the utility pole, the flat belt 8 can be supported. The length of 8 can be easily adjusted to correspond to the thickness of the column 7, and the operator's body can be accurately supported, and the initial purpose can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is a front view of the safety belt of FIG.

FIG. 3 is an exploded perspective view of the safety belt of FIG.

FIG. 4 is a perspective view showing a connected state of the flat belt with respect to the hook of FIG.

FIG. 5 is an explanatory view showing a step of inserting the flat belt of FIG. 4 into a protective tube.

FIG. 6 is an explanatory diagram of another protection tube.

7 is a cross-sectional view showing the positional relationship between the ratchet wheel of FIG. 3 and a pawl.

FIG. 8 is a cross-sectional view showing a state in which the pawl of FIG. 3 is engaged with the teeth of the ratchet wheel.

FIG. 9 is a cross-sectional view showing another embodiment.

10 is a cross-sectional view showing a state in which the pawl of FIG. 9 is engaged with the teeth of the ratchet wheel.

FIG. 11 is an explanatory view showing a conventional safety belt.

12 is a side view of the safety belt of FIG.

[Explanation of symbols]

 1 Body Belt 3 Metal Ring 5 Hook 7 Strut 8 Flat Belt 9 Take-up Reel 11 Shaft 12 Rotor 20, 28 Spring 23 Ratchet Wheel 24 Pole 25 Teeth 33 Handle

Claims (1)

[Claims] 1. A take-up reel mounted on a body belt, a flat belt wound on a rotating body of the take-up reel, a metal ring provided on the body belt, and a tip end of the flat belt. A hook that can be engaged with the metal ring; elastic means that is provided on the winding reel and that acts on the rotating body to elastically bias the rotating body in the winding direction of the flat belt; A ratchet wheel provided on the take-up reel, arranged concentrically with the rotary body, and integrated with the rotary body; and a ratchet wheel provided on the take-up reel and capable of advancing toward the teeth of the ratchet wheel. A pole, which is provided on the take-up reel, acts on the poule, and elastically biases the pawl toward the teeth of the ratchet wheel, and when the flat belt is pulled out from the take-up reel, Elastic means for engaging the teeth of the ratchet wheel with the wl to prevent the rotation of the rotating body; and a winding reel provided on the take-up reel, connected to the pawl, and operating the pawl to move the pawl to the ratchet wheel. And a handle that keeps it away from the teeth of the ratchet wheel so that it does not engage with the teeth of the ratchet wheel.Turn the flat belt around a pole such as a utility pole to support the body of the worker with the flat belt. Safety belt characterized by having been made.