JP3203372U - Lifeline for work at height - Google Patents

Abstract

An object of the present invention is to provide a lifeline for work in high places that is highly safe and can be used for a long period of time. A lifeline main body 1 and a metal fitting 2 and a hook 3 connected to a base end 1a side and a front end 1b side of the lifeline main body are provided. The lifeline main body has an elastic member 5 and a covering member 6. The covering member has a two-layer structure and is longer than the natural length of the elastic member. One end of the elastic member and the covering member is inserted into the connecting ring 4b of the shock absorber 4 connected to the connecting metal fitting, and then folded back, while the other end of the elastic member and the covering member is inserted into the hook connection opening 3a. After that, it is folded back. The inner layer of the covering member has a strength capable of withstanding the impact load when the operator crashes. [Selection] Figure 1

Description

  The present invention relates to a lifeline provided in a safety belt for working at a high place used for preventing a worker from falling at a high place working site.

The safety belt for working at high places is generally composed of a torso belt worn by an operator and a lifeline provided to the torso belt.
The lifeline is usually a connection fitting for connecting a lifeline body (consisting of a strap or a rope) and a trunk belt (or a D-ring of the trunk belt) attached to the base end of the lifeline body, and a tip of the lifeline body. And a hook for locking to the fixing structure attached to the door, and a shock absorber may be provided if necessary.

In addition, there are two types of lifelines: a retractable lifeline with a winder that winds up the lifeline body, and a non-rewindable lifeline that does not have a winder.
In the non-winding type lifeline, the longer the lifeline body, the wider the range that the operator can move, and there is no need to change the hook frequently, but it hung down while working near the hook. In some cases, the lifeline main body hinders the movement of the worker or gets caught in a structure, thereby hindering the work.
On the other hand, if the lifeline body is too short, the hook replacement frequency increases and the work efficiency decreases.

In order to eliminate such drawbacks of the non-winding type lifeline, a lifeline in which the lifeline main body can be extended and contracted has been proposed in the prior art (see, for example, Patent Documents 1 and 2).
In this type of lifeline, the lifeline body is inserted into a long cylindrical low elongation (or non-stretchable) bag belt with a long elastic body having a length shorter than that of the bag belt. Is formed by sewing a bag belt and a long elastic body in a state where is stretched from a natural length.

  The lifeline body has a natural length of the long elastic body, the front and back surfaces of the bag belt are equally wavy and form a bellows structure, and the long elastic body is a bellows with the bag belt extending to the maximum length. It expands and contracts between the extended position until the structure disappears.

  In this conventional lifeline, the long elastic body of the lifeline main body is used exclusively to give elasticity to the lifeline main body, and the bag belt has a function of supporting the worker in a suspended state when the worker falls. ing. Therefore, the bag belt must have a strength higher than the legal reference value to withstand the impact load at the time of the crash.

  By the way, the bag belt also functions as a protective member that covers and protects the outer surface of the long elastic body, so that the bag belt is directly exposed to the external environment and easily deteriorates due to wear or ultraviolet rays. And if an operator's fall occurs in the state where wear and deterioration of a bag belt progressed to a certain level or more, there is a possibility that the bag belt breaks and the worker cannot be protected.

Therefore, it is necessary to replace the bag belt as appropriate while observing the state of wear and deterioration of the bag belt. However, since the correlation between the degree of wear and deterioration of the bag belt and the strength is complicated, it is not easy to judge the replacement time of the bag belt, and therefore the bag belt still has sufficient strength. The belt must be changed.
Furthermore, since the lifeline body has a bellows structure, the portion of the bag belt that forms the bellows of the bellows structure is easily worn and deteriorated, and the portion of the bag belt that forms the valley of the bellows structure is overlooked. I tend to.

  In other words, this conventional lifeline has a problem in that it is somewhat problematic in terms of safety, and requires frequent replacement, which is costly.

Utility Model Registration No. 3170262 JP 2014-1003003 A

  Accordingly, an object of the present invention is to provide a lifeline for work at high places that is highly safe and can be used for a long time.

  In order to solve the above-described problems, the present invention provides a lifeline main body, a connecting bracket attached to a base end of the lifeline main body, for connecting to a trunk belt of a safety belt for working at high places, and a tip of the lifeline main body. A lifeline for working at height, which is provided with a hook for locking to a fixing structure, wherein the lifeline main body has a long elastic member, a cylindrical shape, and the elastic member The covering member has a two-layer structure, the covering member is longer than the natural length of the elastic member, and one end of the elastic member and the covering member are overlapped, and The folded portion is sewn to the elastic member and the body portion of the covering member while the other end of the elastic member and the covering member are connected to each other in a state where the folded portion is inserted and folded through the connection opening of the connecting fitting. Superimposed and said hook The folded portion is sewn to the elastic member and the main body portion of the covering member in a state of being inserted and folded through the connection opening, and the inner layer of the covering member falls when the operator wearing the waist belt falls A lifeline for working at high places, characterized in that it has a strength that can withstand the impact load.

In the above configuration, preferably, the covering member is formed of a double-layered bag fabric.
In this case, a part of the warp constituting the inner layer of the bag fabric is a metal yarn, the remainder of the warp constituting the inner layer is a high-strength synthetic fiber yarn, and the warp yarn constituting the outer layer of the bag fabric and the It is preferable that the wefts constituting the bag fabric are synthetic fiber yarns, and the bag fabric is molded and processed in a wavy shape at a constant pitch in the longitudinal direction.

Alternatively, a part of the warp constituting the inner layer of the bag fabric is a metal yarn, the remainder of the warp constituting the inner layer is a high-strength synthetic fiber yarn, and a part of the warp constituting the outer layer of the bag fabric Is a metal yarn, the remainder of the warp constituting the outer layer and the weft constituting the bag fabric are synthetic fiber yarns, and the bag fabric is molded and bent into a wave shape at a constant pitch in the longitudinal direction. It is preferably molded.
Moreover, it is preferable that the warp which comprises the inner layer of the said bag fabric, and the warp which comprises the outer layer of the said bag fabric have a mutually different color.

  In the above configuration, preferably, the sewing of the folded portion at each of both ends of the elastic member and the covering member is performed by a single binding thread, and the sewing is performed along both sides of the folded portion. A pair of first sewing portions extending linearly and one end connected to one end of one of the pair of first sewing portions, and the pair of first sewing portions from the one first sewing portion A second sewing portion extending in a zigzag shape toward the other of the first sewing portions and in the longitudinal direction of the one first sewing portion, the other end being positioned between the pair of first sewing portions, A straight line extending equidistantly from each of the pair of first sewing parts and extending parallel to the first sewing part is arranged in axial symmetry with the second sewing part, and one end thereof is the other first sewing part. Connected to the tip of the part, the other end A third sewing portion to be connected to the other end of the second sewing portions are formed from further comprises at least one of the rear end of the pair of first sewing portion extends folded distally.

  Alternatively, the stitches of the folded portions at both ends of the elastic member and the covering member are made by a single binding thread, and the stitches are a pair of first linearly extending along both sides of the folded portion. One stitched portion and one end connected to the middle in the longitudinal direction of one of the pair of first stitched portions, and from the one first stitched portion to the other of the pair of first stitched portions. A second sewing portion extending in a zigzag manner to the tip of the one first sewing portion, the other end being positioned between the pair of first sewing portions, and one end being the other first sewing portion. A straight third stitch portion connected to the rear end of the stitched portion and the other end connected to the one end of the second stitched portion, and the pair of first stitched portions are spaced equidistantly from each other. And the straight line extending parallel to the first sewing portion. A fourth sewn portion that is arranged symmetrically with the second sewn portion, has one end connected to the middle in the longitudinal direction of the other first sewn portion, and the other end connected to the other end of the second sewn portion. And a linear fifth sewing portion having one end connected to the rear end of the first sewing portion and the other end connected to the one end of the fourth sewing portion, and the pair of first sewing portions. And a linear sixth sewing portion that connects the tips of the stitched portions, and at least one rear end of the pair of first stitched portions is folded back to the tip side.

  The elastic member is preferably made of one or a plurality of rubber belts or elastic cords.

According to the present invention, the lifeline for working at high altitudes expands and contracts between a position where the elastic member becomes a natural length and the covering member relaxes in a bellows shape, and a position where the elastic member extends until the covering member is in a tension state. To do.
Further, the covering member has a two-layer structure, and the inner layer of this two-layer structure is strong enough to withstand the impact load when the operator crashes. The outer layer of the covering member mainly functions to protect the inner layer from being worn and deteriorated.

  And during normal work, the lifeline for working at high altitudes can be extended and contracted, so that the lifeline for work at high altitudes does not hinder the movement of workers or get caught in the structure, and the operator crashed. In some cases, the lifeline for working at high altitudes extends to the maximum length, but the inner layer of the covering member has a strength that can withstand the impact load at the time of the operator's crash. Rather, the operator is reliably supported in a suspended state from the fixing structure by the work work line for high places.

  Furthermore, according to the present invention, the entire elastic member is covered with the covering member, and the elastic member is protected from wear, deterioration due to ultraviolet rays, and the like. Further, the inner layer of the covering member is covered and protected by the outer layer, and even if the outer layer of the covering member is worn and deteriorated, there is no problem in the strength of the work lifeline for high places when an operator crashes.

  When the outer layer of the covering member has been worn and deteriorated to some extent, it is possible to use the aerial work lifeline for a long period of time while ensuring safety by replacing the aerial work lifeline. The number of work lifeline replacements is also significantly lower than before.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the whole structure when the lifeline for aerial work by one Example of this invention contracts, (A) is the figure seen from one direction, (B) is the aerial work of (A). It is a figure which shows the state which rotated the lifeline 90 degrees around the axis | shaft. In the figure, in order to clarify the internal structure of the lifeline main body, the covering member is drawn as a transparent member. It is a figure similar to FIG. 1 which shows the whole structure when the lifeline for aerial work of FIG. 1 expand | extends to the maximum length. (A) is a perspective view which shows the inside of the lifeline main body of the lifeline for high places work of FIG. 1, (B) is a perspective view which shows the structure of the turning part of the lifeline main body of the lifeline for high places work of FIG. It is. It is a figure which shows the woven structure of the covering member of the lifeline for work in high places of FIG. 1, Comprising: (A) is a cross-sectional view in the position which is not a connection point of the inner layer and outer layer of a woven structure, (B) is a woven structure. It is a cross-sectional view in the connection point of the inner layer of this, and an outer layer, (C) is a cross-sectional view which shows the modification of (B). (A) is a top view which shows one example of the sewing part of the folding | returning part of the elastic member of the life work work plan of FIG. 1 and a covering member, (B) is a top view which shows the sewing pattern of (A). It is. (A) is a top view which shows another example of the sewing part of the folding | returning part of the elastic member of the lifeline for work in high places of FIG. 1, and a covering member, (B) is a plane which shows the sewing pattern of (A). It is a figure and (C) is a top view which shows an example of the sewing pattern of the folding | turning part of the lifeline main body of the conventional lifeline for high-altitude work.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a plan view showing an overall configuration when a working work for aerial work according to one embodiment of the present invention is contracted, and FIG. 1 (A) is a view seen from one direction, and FIG. FIG. 2 is a view showing a state where the lifeline for working at height in FIG. 1A is rotated by 90 ° around its axis. In the figure, in order to clarify the internal structure of the lifeline main body, the covering member is drawn as a transparent member. Moreover, FIG. 2 is a figure similar to FIG. 1 which shows the whole structure when the lifeline for high-altitude work of FIG. 1 is extended to the maximum length.

  As shown in FIG. 1 and FIG. 2, the lifeline for aerial work according to the present invention includes a lifeline main body 1 and a safety belt for aerial work attached to a base end 1a of the lifeline main body 1 via a shock absorber 4. A coupling fitting 2 for coupling to a trunk belt (not shown) and a hook 3 attached to the distal end 1b of the lifeline main body 1 for locking to a fixing structure (not shown) are provided. ing.

In this embodiment, the connecting metal fitting 2 has a flat plate shape, has a long hole 2a for inserting a waist belt, and is directly connected to the waist belt. The connection fitting 2 also has a round hole (connection opening) 2b, and one connection ring 4a of the shock absorber 4 is connected to the round hole 2b.
For example, in the case of a lifeline for working at height, which is connected to the D ring of the trunk belt, a hook, a carabiner, or the like is used. Is used.

  Further, in this embodiment, the shock absorber 4 is disposed between the base end 1a of the lifeline main body 1 and the connecting metal fitting 2, but the shock absorber 4 is provided as necessary and is not an essential component of the present invention. . Further, the shock absorber 4 can be disposed between the tip 1b of the lifeline main body 1 and the hook 3.

FIG. 3A is a perspective view showing the inside of the lifeline main body of the life work for high places shown in FIG.
As shown in FIG. 1 to FIG. 3A, the lifeline body 1 of the lifeline for working at high places has a long elastic member 5. The elastic member 5 is composed of a plurality of rubber strings.
The configuration of the elastic member 5 is not limited to this, and any known member that can expand and contract in the longitudinal direction can be used as the elastic member 5. For example, instead of a plurality of rubber strings, a single rubber string or one or a plurality of flat rubber belts may be used.

The lifeline main body 1 further includes a cylindrical covering member 6 that covers the elastic member 5.
In this embodiment, the covering member 6 is composed of a double-layered bag fabric 7a, 7b, which is longer than the natural length of the elastic member 5, and preferably about twice as long as the natural length of the elastic member 5. Have.

FIG. 4 (A) is a cross-sectional view at a position where the inner layer (inner woven structure) and outer layer (outer woven structure) of the front (back) fabric of this bag fabric are not connected, and FIG. It is a cross-sectional view at the connection point of the inner layer and the outer layer.
Referring to FIGS. 4A and 4B, the front (back) fabric of the bag fabrics 7a and 7b has a double weaving structure composed of two plain weaving structures connected to each other.
Part of the warp constituting the inner layer (inner woven structure) 7a of the front (back) surface of the bag fabric is made of metal yarn (for example, yarn of copper, aluminum, stainless steel, etc.) 15, and the remainder of the warp constituting the inner layer 7a Is made of high-strength synthetic fiber yarn (for example, nylon yarn, polyester yarn and aramid fiber yarn) 16. The warp yarn 17 constituting the outer layer (outer woven structure) 7b of the front (back) fabric of the bag fabric and the weft yarns 18a, 18b constituting the inner and outer layers 7a, 7b of the front (back) fabric of the bag fabric are, for example, nylon. Made of synthetic fiber yarn such as yarn and polyurethane yarn.
In this case, the synthetic fiber yarn used as the warp yarn of the outer layer 7b of the bag fabric and the weft yarns 18a, 18b of the inner and outer layers 7a, 7b of the bag fabric need not necessarily have high strength.

The two-layer bag fabrics 7a and 7b are formed by weaving the inner layer 7a and the outer layer 7b separately to each other and weaving them to a certain length (FIG. 4A), and then wefts 18b constituting the outer layer 7b as inner layers. It is woven by repeatedly executing the process of binding (FIG. 4 (B)) to the warps 15 and 16 constituting 7a.
In this case, as shown in FIG. 4C, the inner and outer layers 7a and 7b can be connected by connecting the weft 18a constituting the inner layer 7a to the warp 17 constituting the outer layer 7b.

In this embodiment, the warp 16 and the warp 17 have different colors.
Note that the double woven structure of the front (back) fabric of the covering member (bag woven fabric) 6 can also be composed of a woven structure other than plain weave such as two twilled structures joined together.
The bag fabrics 7a and 7b (covering member 6) are formed and processed in a state of being bent into a wave shape at a constant pitch in the longitudinal direction.

  Referring again to FIG. 1, one end of the elastic member 5 and the covering member 6 (the base end 1 a side of the lifeline main body 1) is overlapped with each other, and is inserted into the other connecting ring 4 b of the shock absorber 4 and folded back. Thus, the folded portion 8a is sewn to the main body portions of the elastic member 5 and the covering member 6, while the other ends (the tip 1b side of the lifeline main body 1) of the elastic member 5 and the covering member 6 are overlapped with each other, and the hook The folded portion 8 b is sewn to the body portions of the elastic member 5 and the covering member 6 in a state where the folded portion 8 b is inserted and folded through the three connection openings 3 a.

  FIG. 3B is a perspective view showing the configuration of the folded portion. With reference to FIG. 3B, in this embodiment, a tube 9 made of synthetic resin is fitted into the curved portions of the folded portions 8a and 8b of the elastic member 5 and the covering member 6, and further, the folded portions 8a and 8b. The sewn portion is covered with a heat shrinkable tube 10.

FIG. 5A is a plan view showing an example of a sewn portion of the folded portion of the elastic member and the covering member, and FIG. 5B is a plan view showing the sewing pattern of FIG. 5A.
Referring to FIG. 5, the folded portions 8 a and 8 b are sewn using a single sewing thread using a sewing machine. In this case, in this embodiment, the sewing pattern includes a pair of first sewing portions 11a and 11b extending linearly along both sides of the folded portions 8a and 8b and a pair of first sewing portions 11a and 11b at one end. One of the first sewing parts 11a to the other 11b of the pair of first sewing parts 11a, 11b and one of the first sewing parts 11a. A second sewing portion 11c and a pair of first sewing portions 11a and 11b each extending in a zigzag manner to the middle in the longitudinal direction of the sewing portion 11a and having the other end positioned between the pair of first sewing portions 11a and 11b. With respect to the straight line L extending equidistantly and parallel to the first sewing parts 11a and 11b, and is arranged in axial symmetry with the second sewing part 11c, and one end is the tip of the other first sewing part 11b (point o) ) A third sewing portion 11d connected to the other end of the second sewing portion 11c, and the rear ends (point n, point p) of the pair of first sewing portions 11a, 11b, respectively It folds back to the tip (point m, point o) side (folded seam portions 11e, 11f).

FIG. 6A is a plan view showing another example of the sewn portion of the folded portion of the elastic member and the covering member, and FIG. 6B is a plan view showing the sewing pattern of FIG. 6A. .
Referring to FIG. 6, also in this embodiment, the folded portions 8a and 8b are sewn using a sewing machine and a single binding thread. The sewing pattern includes a pair of first sewing portions 12a and 12b extending linearly along both sides of the folded portions 8a and 8b and one end of the pair of first sewing portions 12a in the longitudinal direction. To the other 12b of the pair of first sewing parts and to the tip (point w) of the first sewing part 12a in a zigzag manner. The other end is connected to the second sewing portion 12c located between the pair of first sewing portions 12a and 12b, and one end is connected to the rear end (point z) of the other second sewing portion 12b. The first and second sewing parts 12a and 12b are spaced equidistantly from each of the linear third sewing part 12d connected to the one end of the second sewing part 12c and the pair of first sewing parts 12a and 12b. Second sewing with respect to a straight line L ′ extending parallel to A fourth sewn portion that is arranged symmetrically with the second portion 12c, has one end connected to the middle in the longitudinal direction of the other first sewn portion 12b and the other end connected to the other end of the second sewn portion 12c. 12e, a linear fifth sewing portion 12f having one end connected to the rear end (point x) of one first sewing portion 12a and the other end connected to the one end of the fourth sewing portion 12e; A straight sixth sewing portion 12g that connects the tips (point w, point y) of the pair of first sewing portions 12a, 12b, and the rear end of one first sewing portion 12a (Point x) is folded back to the tip (point w) side (folded stitching portion 12h).

The features of the sewing pattern of the present invention shown in FIG. 5 and FIGS. 6 (A) to 6 (B) are between a pair of sewing portions (a pair of first sewing portions) extending along both sides of the folded portions 8a and 8b. , There is no sewn portion extending at a right angle, or there is a sewn portion extending at a right angle at the rear end of the pair of sewn portions.
By adopting the sewing pattern of the present invention, for example, as shown in FIG. 6C, at the front and rear ends of a pair of sewing portions 14a and 14b extending along both sides of the folded portion, Compared to the conventional sewing pattern having the extended sewing portions 14c and 14d, the breaking strength of the folded portion when the lifeline is pulled can be increased by about 20%.

  The inner layer 7a of the covering member 6 has a strength capable of withstanding an impact load when the operator crashes, including the breaking strength of the folded portions 8a and 8b.

With the above-described configuration, the lifeline for working at height is between the position where the elastic member 5 has a natural length and the covering member 6 is loosened in a bellows shape and the position where the elastic member 5 extends until the covering member 6 is in a tensioned state. It expands and contracts with.
The covering member 6 is composed of two-layered bag fabrics 7a and 7b, and the inner layer 7a of the bag fabric has a strength capable of withstanding an impact load at the time of the operator crash. On the other hand, the outer layer 7b of the bag fabric mainly functions to protect the inner layer 7a from being worn and deteriorated.

  And during normal work, the lifeline for working at high altitudes can be extended and contracted, so that the lifeline for work at high altitudes does not hinder the movement of workers or get caught in the structure, and the operator crashed. In such a case, the work work line at a high altitude extends to the maximum length, but the inner layer 7a of the covering member 6 has a strength that can withstand an impact load when the operator crashes, so that the work life line at a high work area breaks. The worker is surely supported in a suspended state from the fixing structure by the work work at a high place.

  In addition, the entire elastic member 5 is covered with the covering member 6, and the elastic member 5 is protected from wear, deterioration due to ultraviolet rays, and the like. Furthermore, the inner layer 7a of the covering member 6 is covered and protected by the outer layer 7b, and even if the outer layer 7b is worn or deteriorated, there is no problem in the strength of the lifeline for working at high places when the worker crashes.

  And, by replacing the lifeline for work at a high altitude when the wear and deterioration of the outer layer 7b of the covering member 6 has progressed to a certain extent, the lifeline for work at a high altitude can be used for a long period of time while ensuring safety, The number of times of changing the lifeline for working at heights is also greatly reduced. In this case, since the inner layer 7a and the outer layer 7b of the covering member 6 have different warp colors, if a part of the outer layer 7b is perforated, the color of the inner layer 7a can be seen from there, thereby causing wear and deterioration of the outer layer 7b. The degree can be visually recognized quickly and easily.

As mentioned above, although the structure of this invention was demonstrated based on the preferable Example, the structure of this invention is not limited to the said Example, In the range of the structure described in the claim of the utility model registration of this application, various modifications are possible. Can be devised.
For example, in the above embodiment, a metal yarn is used for a part of the warp of the inner layer of the covering member, and the remaining warp and weft of the inner layer are made of high-strength synthetic fiber yarn. These warp and weft yarns may all be high-strength synthetic fiber yarns.
Alternatively, the metal yarn can be used not only for a part of the warp of the inner layer of the covering member but also for a part of the warp of the outer layer of the covering member.
Moreover, in the said Example, although the coating | coated member was made into the bag fabric of a two-layer structure, a coating | coated member has a two-layer structure, The inner layer can endure the impact load at the time of the fall of the operator who mounted | worn the trunk | belt belt. As long as it has strength and can be folded back and sewed, it may be other than the bag woven fabric.

1 Lifeline body 1a Base end 1b Tip 2 Connection fitting 2a Long hole 2b Round hole (connection opening)
3 Hook 3a Connection opening 4 Shock absorber 4a, 4b Connection ring 5 Elastic member 6 Cover member 7a Inner layer 7b Outer layer 8a, 8b Folded portion 9 Synthetic resin tube 10 Heat shrinkable tube 11a, 11b First sewing portion 11c Second sewing portion Sewn portion 11d 3rd sewn portion 11e, 11f Folded stitched portion 12a, 12b 1st sewn portion 12c 2nd sewn portion 12d 3rd sewn portion 12e 4th sewn portion 12f 5th sewn portion 12g 6th sewn portion 12g Sewn portion 12h Folded stitched portions 14a, 14b Sewn portions 14c, 14d extending along both sides of the folded portion Sewn portions 15 extending perpendicularly Metal thread 16 Warp constituting the inner layer (high-strength synthetic fiber yarn)
17 Warp yarn (synthetic fiber yarn) constituting the outer layer
18a Weft (synthetic fiber yarn) constituting the inner layer
18b Weft (synthetic fiber yarn) constituting the outer layer
G sewing end point S sewing start point L, L 'straight line m one first sewing part tip n one first sewing part rear end o other first sewing part tip p other first sewing part Rear end w of the first sewing portion Tip x of one first sewing portion Rear end y of the first first sewing portion Leading end z of the other first sewing portion Rear end of the other first sewing portion

Claims (8)

The lifeline itself,
A connection fitting attached to the base end of the lifeline main body, for connection to the trunk belt of the safety belt for working at height,
In a lifeline for working at height, provided with a hook for locking to a fixing structure, attached to the tip of the lifeline body,
The lifeline body is
A long elastic member;
A cylindrical member having a covering member that covers the elastic member;
The covering member has a two-layer structure,
The covering member is longer than the natural length of the elastic member, and the folded portion is in a state where the elastic member and one end of the covering member are overlapped with each other, and are inserted and folded through the connection opening of the connection fitting. While the elastic member and the covering member are sewn to the main body portion, the other ends of the elastic member and the covering member are overlapped with each other, and are inserted into the connection opening of the hook and folded. The folded portion is sewn to the elastic member and the body portion of the covering member, and the inner layer of the covering member has a strength that can withstand the impact load when the operator wearing the waist belt falls. A lifeline for working at heights, characterized by being.   The lifeline for working at high places according to claim 1, wherein the covering member is made of a double-layered bag fabric.   A part of the warp constituting the inner layer of the bag fabric is a metal yarn, the remainder of the warp constituting the inner layer is a high-strength synthetic fiber yarn, and the warp yarn constituting the outer layer of the bag fabric and the bag fabric 3. The lifeline for aerial work according to claim 2, wherein the weft constituting is a synthetic fiber yarn, and the bag fabric is molded into a wave-like bent shape at a constant pitch in the longitudinal direction.   A part of the warp constituting the inner layer of the bag fabric is a metal yarn, the remainder of the warp constituting the inner layer is a high-strength synthetic fiber yarn, and a part of the warp constituting the outer layer of the bag fabric is a metal. The remaining warp constituting the outer layer and the weft constituting the bag fabric are synthetic fiber yarns, and the bag fabric is molded and molded into a wave-like shape bent at a constant pitch in the longitudinal direction. The lifeline for aerial work according to claim 2, wherein   5. The work for aerial work according to claim 2, wherein the warp constituting the inner layer of the bag fabric and the warp constituting the outer layer of the bag fabric have different colors. lifeline. The sewing of the folded portion at each end of the elastic member and the covering member is made by a single binding thread,
The sewing is
A pair of first sewing portions extending linearly along both sides of the folded portion;
One end is connected to the tip of one of the pair of first stitched portions, from the one first stitched portion toward the other of the pair of first stitched portions, and the one first stitched portion. A second sewing portion extending zigzag to the middle in the longitudinal direction of one sewing portion and having the other end positioned between the pair of first sewing portions;
The first sewing portion is arranged at an equal interval from each of the first sewing portions and in parallel with the first sewing portion with respect to a straight line extending in parallel with the second sewing portion, and one end thereof is the other first sewing portion. A third sewing portion connected to the tip of the sewing portion and having the other end connected to the other end of the second sewing portion, and at least one of the pair of first sewing portions The lifeline for working at high places according to any one of claims 1 to 5, wherein a rear end of the rear portion is folded back to a front end side. The sewing of the folded portion at each end of the elastic member and the covering member is made by a single binding thread,
The sewing is
A pair of first sewing portions extending linearly along both sides of the folded portion;
One end is connected to the longitudinal middle of one of the pair of first sewing parts, and the one side is directed from the one first sewing part to the other of the pair of first sewing parts, and the one A second stitching portion extending in a zigzag manner to the tip of the first stitching portion and having the other end positioned between the pair of first stitching portions,
A linear third sewing portion having one end connected to the rear end of the other first sewing portion and the other end connected to the one end of the second sewing portion;
The first sewing portion is arranged at an equal interval from each of the first sewing portions and in parallel with the first sewing portion with respect to a straight line extending in parallel with the second sewing portion, and one end thereof is the other first sewing portion. A fourth sewing portion connected to the middle in the longitudinal direction of the sewing portion and having the other end connected to the other end of the second sewing portion;
A linear fifth sewing portion having one end connected to the rear end of the first sewing portion and the other end connected to the one end of the fourth sewing portion;
A linear sixth sewing portion that connects the tips of the pair of first sewing portions, and at least one rear end of the pair of first sewing portions is on the tip side. The lifeline for working at high places according to any one of claims 1 to 5, wherein the lifeline for working at high places is folded back.   The lifeline for aerial work according to any one of claims 1 to 7, wherein the elastic member is composed of one or a plurality of rubber belts or rubber strings.

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