JP6733884B2 - Harness type safety belt - Google Patents

Description

The present invention relates to a harness type safety belt. More specifically, the present invention relates to a safety belt suitable for work on slopes and the like.

Examples of work performed on the slope (slope) include slope cutting, slope protection, earth retaining work, slope survey, and the like. Unnecessary earth and sand on the slopes are removed or shaped by the cut-off method. In slope protection work, formation of a frame, spraying of mortar or soil, sticking of vegetation mat or rather, greening, etc. are performed. The slope protector enhances the stability of the slope or prevents erosion. In earth retaining work, earth retaining is placed at the end of the slope or the middle of the slope. Soil retaining works prevent the slope from collapsing. In the slope survey, damage on the slope is inspected.

In the slope work, a rope is hung on the slope. There is a case where one master rope is used for one worker and a case where two master ropes are used. The construction method in which one master rope is used is referred to as the "master rope one-piece construction method". The construction method in which two master ropes are used is referred to as the “two main rope construction method”.

In the case of the single main rope construction method, a grip is connected to the main rope. A pair of child ropes are connected to this grip. Each child rope is connected to a belt wound by an operator. The worker deposits the weight on the master rope through the child rope and performs the work while maintaining the posture. If the worker loses stance, the child rope and the master rope prevent the worker from falling. In the one-line construction method of the master rope, this master rope serves both to maintain the posture and to prevent the fall. The master rope is a member related to the safety of workers. Therefore, it is necessary to frequently check the damage of the master rope for the purpose of not cutting the master rope. From this point of view, the two-pronged construction method is recommended.

FIG. 8 is a front view showing a state of a conventional two-line main rope construction method. In this construction method, the main rope 2 that is the first master rope and the lifeline 4 that is the second master rope are hung on the slope S. Further, the hip pad 6, the waist belt 8, the grip 10, the pair of first child ropes 12, the slider 14, and the second child rope 16 are used in this construction method. The hip pad 6 is connected to the waist belt 8. The worker winds the waist belt 8 around the torso.

A grip 10 is connected to the main rope 2. The grip 10 is locked, and the position of the grip 10 with respect to the main rope 2 is fixed. A pair of first child ropes 12 are connected to the grip 10. Each first child rope 12 is connected to the buttocks 6. The worker deposits the weight on the master rope via the buttocks 6 and the pair of first child ropes 12, and performs the work while maintaining the posture. A slider 14 is passed through the lifeline 4. A second child rope 16 is connected to the slider 14. The second child rope 16 is connected to the waist belt 8. If the operator falls down or the like, the second child rope 16 pulls the slider 14 downward. At this time, the emergency locking mechanism of the slider 14 operates, and further sliding of the slider 14 is blocked. Therefore, the worker is suspended by the waist belt 8, the second rope 16, the slider 14 and the lifeline 4, and the worker is prevented from falling. In the two-rope construction method, the main rope 2 plays a role of maintaining the posture of the worker, and the lifeline 4 plays a role of preventing a fall. In this construction method, even if the main rope 2 is cut, the worker's safety is protected by the lifeline 4. When the operator wants to move up and down, the grip 10 is grasped by hand and the lock is released. When released, the grip 10 can slide with respect to the main rope 2.

By the way, there are waist belt type and harness type safety belts. In the harness-type safety belt, when a worker falls, the impact is dispersed to multiple points on the human body. In addition, gravity is dispersed in a plurality of parts of the human body even in a state of being suspended from the main rope after falling. With the harness-type safety belt, the burden on the dropped worker is small. An example of a harness type safety belt is disclosed in Japanese Patent Laid-Open No. 2005-223292.

JP, 2005-223292, A

The harness-type safety belt has a ring. A child rope or the like is connected to this ring. In the "standard of safety belt" announced by the Ministry of Health, Labor and Welfare, the position of the ring is defined as the chest or back. When an operator who wears a safety belt having a ring on the chest or the back falls, the impact is dispersed at multiple points on the human body. When the worker is hung on the main rope, the posture of the worker is close to the standing position because the ring is on the chest or the back. With a harness-type safety belt having a ring on the chest or back, the burden on the dropped worker is small.

As described above, in the slope work, the worker maintains the posture by depositing the weight on the master rope. In order to maintain the posture, the rope must be connected near the center of gravity of the human body. In other words, the rope must be connected to a belt wrapped around the waist or hips. From this viewpoint, a waist belt type safety belt is used in the slope work.

Since the harness type safety belt is excellent in safety, it is recommended to wear this harness type safety belt even on slope work. However, in the harness type safety belt, the position of the ring is far from the center of gravity of the human body. Therefore, in order to maintain the posture of the worker in the work on the slope, it is necessary for the worker to wind the belt around the waist or the hip in addition to the harness type safety belt.

As described above, the waist belt type safety belt is used for the slope work, but the disadvantages when the harness type safety belt is used for the slope work will be described below. FIG. 9 is a front view showing how a worker wearing the conventional harness type safety belt 18 works on the slope S, and FIG. 10 is a plan view thereof. In this example, the wire 22 of the retractor-type fall arrester 20 is used as the lifeline. As shown in FIGS. 9 and 10, the child rope 12 connected to the main rope 2 by the grip 10 is connected to the buttocks 6. The buttocks 6, the rope 12 and the main rope 2 allow the worker to maintain the posture. The wire 22 is connected to the harness-type safety belt 18. The wire 2 and the harness type safety belt 18 prevent the worker from falling.

In the construction method shown in FIGS. 9 and 10, the wire 22 is connected to the ring 24 of the harness-type safety belt 18. As described above, this ring 24 exists at the position of the chest of the operator. In other words, the end of the wire 22 is at the position of the operator's chest. The wire 22 hinders the work of the operator. The conventional harness-type safety belt 18 is not suitable for work on the slope S.

An object of the present invention is to provide a harness type safety belt which is excellent in workability and safety in work on slopes and the like.

The harness type safety belt according to the present invention,
(1) A main part having a shoulder belt and a thigh belt,
(2) The first part, which is connected to the main part and is located on the operator's chest,
(3) An extension connected to the first part,
(4) A second ring connected to the extension tool,
And (5) a temporary fastener for attaching the second ring to the main part. In the state where the second ring is attached to the main portion by the temporary fastener, the second ring is located below the first body in the vertical direction of the human body of the worker.

Preferably, in the state where the second ring is attached to the main portion by the temporary fastener, the second ring is located on the right side or the left side of the center of the human body of the worker.

Preferably, the distance between the first ring and the second ring is 15 cm or more when the second ring is attached to the main portion by the temporary fastener.

Preferably, the temporary fastener has a snap of studs and sockets and an auxiliary belt attached to the extension. A stud is attached near one end of the auxiliary belt, and a socket is attached near the other end of the auxiliary belt. The second ring can be attached to the main portion by winding the auxiliary belt around the main portion and pressing the stud into the socket.

In the safety belt according to the present invention, a lifeline can be connected to the safety belt below the operator's chest. Therefore, the operator does not feel bothersome during the work. Since this safety belt is a harness type, it has excellent safety.

FIG. 1 is a front view showing a harness type safety belt according to an embodiment of the present invention. FIG. 2 is an enlarged development view showing a part of the safety belt of FIG. FIG. 3 is an enlarged front view showing a part of the safety belt of FIG. FIG. 4 is an enlarged rear view showing a part of the safety belt of FIG. 1. FIG. 5 is a front view showing a state of slope work using the safety belt of FIG. 1. FIG. 6 is a plan view showing the operation state of FIG. FIG. 7 is a side view showing a state where an operator wearing the safety belt of FIG. 1 falls. FIG. 8 is a front view showing a state of a conventional two-line main rope construction method. FIG. 9 is a front view showing a state of slope work by an operator wearing a conventional harness-type safety belt. FIG. 10 is a plan view showing the operation state of FIG.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings as appropriate.

The harness-type safety belt 26 shown in FIGS. 1 and 2 has a main portion 28, a first part 30, an extension belt 32 (corresponding to an extension tool), a second ring 34, and a temporary fastener 36. FIG. 1 also shows the buttocks 6, the waist belt 8 and the pair of connecting belts 38 together with the safety belt 26. Each connecting belt 38 connects the buttocks 6 and the waist belt 8.

The main portion 28 has a pair of shoulder belts 40, a pair of suspension belts 42, a pair of thigh belts 44, a chest belt 46, a pair of belt stoppers 48, and a pad 50. The safety belt 26 having the shoulder belt 40 and the thigh belt 44 is called "harness type".

Each shoulder belt 40 has a first end 52 and a second end 54. The vicinity of the first end 52 is joined to the thigh hanging belt 44. A typical joining method is suturing. In the vicinity of the second end 54, the shoulder belt 40 is connected to the belt stopper 48. The shoulder belt 40 intersects with the other shoulder belts 40. The position of the intersection corresponds to the back of the worker. The pad 50 is attached to the shoulder belt 40 at the intersection. The pad 50 contacts the back or shoulder of the worker. The pad 50 enhances the wearing feeling of the operator.

Each suspension belt 42 has an upper end 56 and a lower end 58. The vicinity of the upper end 56 is folded back at the belt stopper 48. The size of the safety belt 26 can be adjusted by adjusting the folding length. The vicinity of the lower end 58 of the hanging belt 42 is joined to the thigh hanging belt 44. A typical joining method is stitching. The second end 54 of the shoulder belt 40 is attached to the thigh belt 44 via the suspension belt 42. The hanging belt 42 may not be provided, and the second end 54 may be directly attached to the thigh hanging belt 44.

Each thigh belt 44 has a buckle 60. The buckle has a plug 62 and a socket 64. The plug 62 is located at one end of the thigh belt 44. The socket 64 is located at the other end of the thigh hanging belt 44. The thigh hanging belt 44 forms a loop by inserting the plug 62 into the socket 64. This loop winds around the operator's thigh.

The chest belt 46 has a right belt 66, a left belt 68 and a buckle 70. The buckle 70 has a plug 72 and a socket 74. The vicinity of the right end of the right belt 66 is joined to the shoulder belt 40. A typical joining method is suturing. The plug 72 is connected to the left end of the right belt 66. The vicinity of the left end of the left belt 68 is joined to the shoulder belt 40. A typical joining method is suturing. The socket 74 is connected to the right end of the left belt 68. The plug 72 can be plugged into the socket 74.

The first part 30 is a so-called D ring. The first piece 30 may have other shapes. The first part 30 is connected to the chest belt 46. When the plug 72 is inserted into the socket 74, the first part 30 is located substantially in the center of the chest of the worker.

FIG. 2 shows a first part 30, an extension belt 32 (corresponding to an extension tool), a second ring 34 and a temporary fastener 36. The upper end of the extension belt 32 is connected to the first part 30. In the state shown in FIGS. 1 and 2, the extension belt 32 extends from the first part 30 toward the lower left (lower right of the worker).

The second ring 34 is a so-called D ring. The second ring 34 may have other shapes. The second ring 34 is connected to the extension belt 32 near the lower end of the extension belt 32.

The temporary fastener 36 has an auxiliary belt 76 and a snap 78. The auxiliary belt 76 is attached to the extension belt 32. A typical attachment method is suture. The snap 78 has a stud 80 and a socket 82. The stud 80 is attached near one end of the auxiliary belt 76. The socket 82 is attached near the other end of the auxiliary belt 76.

FIG. 3 is an enlarged front view showing a part of the safety belt 26 of FIG. 1, and FIG. 4 is an enlarged rear view thereof. In the state shown in FIGS. 1, 3 and 4, the auxiliary belt 76 is wound around the suspension belt 42. Then, the stud 80 (see FIG. 2) is press-fitted into the socket 82. By this press fitting, the second ring 34 is attached to the suspension belt 42 via the auxiliary belt 76 and the extension belt 32. The coupling force of the snap 78 is relatively weak. When the weight of the operator is applied to the snap 78, the stud 80 is easily removed from the socket 82. In other words, the second ring 34 is temporarily fastened to the suspension belt 42. The second ring 34 may be temporarily fixed to a portion of the main portion 28 other than the hanging belt 42. For example, the second ring 34 may be temporarily fastened to the shoulder belt 40, the thigh belt 44, or the like.

The means for temporarily fixing the second ring 34 to the main portion 28 is not limited to the snap 78. Various means can be employed. For example, the second ring 34 may be temporarily fastened to the main portion 28 with a surface fastener (registered trademark “velcro tape” or the like). The second ring 34 may be temporarily fixed to the main portion 28 by suturing with a weak bonding force.

In the state shown in FIGS. 1, 3 and 4, the second ring 34 is located below the first part 30 in the vertical direction of the human body of the worker. Further, the second ring 34 is located on the right side or left side (right side in the example of FIG. 1) of the center of the human body of the worker. Specifically, the position of the second ring 34 corresponds to the side of the worker.

5 is a front view showing a state of slope work using the safety belt 26 of FIG. 1, and FIG. 6 is a plan view thereof. In this work, the main rope 2 is tied to the first pole 84, and the main rope 2 is hung on the slope S. Further, a retractor-type fall prevention tool 88 is attached to the second pole 86. The fall preventive tool 88 has a casing 90, a wire 92 wound in the casing 90, and a safety device (not shown). When the wire 92 is suddenly paid out, the safety device prevents the wire 92 from being paid out. The wire 92 extends downward from the slope S. This wire 92 is a lifeline. Further, the grip 10, the buttocks 6, the waist belt 8 and the pair of cords 94 are used for this work. The worker wears the safety belt 26 and further wears the waist belt 8 around the waist. Instead of the wire 92, a rope may be used as the lifeline.

The position of the grip 10 with respect to the main rope 2 is fixed. The worker deposits his/her weight on the main rope 2 via the buttocks 6 and the pair of child ropes 94, and performs slope work while maintaining the posture. When the worker moves up and down, the position of the grip 10 is released. The wire 92 is paid out from the casing 90 or wound around the casing 90 as the operator moves.

The tip of the wire 92 is connected to the second ring 34 (see also FIG. 1, etc.). As described above, the second ring 34 is located on the side of the worker. Therefore, the worker is unlikely to be hindered by the wire 92. This safety belt 26 has excellent workability.

In FIG. 2, what is indicated by an arrow L is the distance between the first part 30 and the second ring 34. The distance L is measured when the second ring 34 is attached to the main portion 28 by the temporary fastener 36. From the viewpoint of workability, the distance L is preferably 15 cm or more, and particularly preferably 20 cm or more. This distance is preferably 60 cm or less.

For some reason, an operator may fall on the slope S. When the worker falls, the wire 92 is suddenly paid out from the casing 90. In the fall preventive tool 88 (see FIG. 5) that detects the unrolling, the safety device is activated and the wire 92 is further unrolled. Due to this blocking, the wire 92, the extension belt 32, and the auxiliary belt 76 are tensioned by the weight of the operator. This tension causes snap 78 to disengage. Then, as shown in FIG. 7, the worker is suspended by the main portion 28, the first part 30, the extension belt 32, the second ring 34 and the wire 92.

Since the safety belt 26 is of the harness type as described above, when the worker falls, the impact is dispersed to a plurality of places on the human body. When the worker is suspended on the wire 92, the body of the worker is close to the standing position, as shown in FIG. 7, because the first part 30 is on the chest. With this safety belt 26, the burden on the dropped worker is small.

In this way, the safety belt 26 contributes to workability during normal slope work and contributes to the safety of the worker during an emergency.

According to another aspect, the present invention relates to a slope work equipment. This equipment includes a main rope 2, a lifeline 92, a harness-type safety belt 26, and a waist belt 8 (or a buttocks 6). With this equipment, the worker can work in a preferable posture. With this equipment, the worker does not feel the lifeline 92 bothersome. With this equipment, the safety of the worker who has fallen can be achieved.

The harness-type safety belt described above can be used for various work on a slope.

2... Main rope 6... Buttocks 8... Waist belt 26... Harness type safety belt 28... Main part 30... First part 32... Extension belt 34... Two rings 36... Temporary fastener 40... Shoulder belt 42... Hanging belt 44... Thigh belt 46... Chest belt 70... Buckle 76... Auxiliary belt 78... Snap 80: Stud 82: Socket 88: Retractor-type fall preventive tool 92: Wire

Claims (4)

A harness type safety belt used in work performed on the slope,
(1) A main part having a shoulder belt and a thigh belt,
(2) The first part, which is connected to the main part and is located on the chest of the worker,
(3) Extension tool connected to the first part,
(4) A second ring connected to the extension tool,
And (5) a temporary fastener for attaching the second ring to the main portion,
In a state in which the second ring is attached to a portion of the main portion that extends along the flank of the main portion, the second ring is closer to the flank than the first part, and is the vertical direction of the human body of the worker. In, the harness type safety belt located below the first part . The harness type safety belt according to claim 1, wherein the second ring is positioned on the right side or the left side of the center of the human body of the worker in a state where the second ring is attached to the main portion by the temporary fastener. The harness type safety belt according to claim 1 or 2, wherein a distance between the first part and the second ring is 15 cm or more in a state where the second ring is attached to the main portion by the temporary fastener. The temporary fastener has a snap consisting of a stud and a socket, and an auxiliary belt attached to the extension tool,
A stud is attached near one end of the auxiliary belt, and a socket is attached near the other end of the auxiliary belt,
The harness type safety belt according to any one of claims 1 to 3, wherein the second ring can be attached to the main portion by winding the auxiliary belt around the main portion and pressing the stud into the socket. ..

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