KR20220095111A - Shock Absorbing Device - Google Patents

Abstract

The present invention provides a new impact absorbing device having impact absorbing performance which can be used in a large range in a weight condition of a worker and a use condition. According to the present invention, the impact absorbing device is composed of an impact absorbing area configured by enabling a first joint yarn and a second joint yarn to seal two belts into one and a separation area which is not sealed outside the impact absorbing area. Moreover, the number of weft, where the first joint yarn passes, aligned in a longitudinal direction of the belt is expressed as a : a and b : b, wherein the a is the number of the weft where the first joint yarn passes, the b is the number of the weft where the second joint yarn passes, both the a and the b are the whole number of at least 1, and the b is larger than the a.

Description

Shock Absorbing Device

This invention relates to a shock absorbing mechanism. Specifically, it relates to a shock absorbing mechanism including a belt that is coupled between a safety belt worn on the body of a worker working at height and a structure to absorb the fall load in the event of a fall of the worker and prevent the worker from falling over a certain length will be.

Japanese Laid-Open Patent Publication No. 2003-275333 (Document 1) discloses a seat belt worn on the human body, a hook, and a connection belt for connecting the seat belt and the hook.

In the invention of Document 1, the connecting belt is composed of a seat belt composed of warp and weft yarns. In the seat belt, the base yarn and the core are used as the warp, and while the connecting belt is stretched up to 25%, at least a part of the core is broken and the base yarn is It is constructed so as not to break.

In addition, in Japanese Patent Application Laid-Open No. 2018-68915 (Document 2), a separation portion composed of a first belt and a second belt formed of a narrow belt-shaped belt and formed independently of each other, and both sides of the separation portion Disclosed is a shock absorbing mechanism provided with a shock absorbing portion comprising a narrow belt-shaped belt continuously extending outward from an end portion and integrally stacked with first and second belts interposed therebetween.

In this shock absorbing mechanism, the warp and weft yarns constituting the first and second belts are made of chemical fiber yarns, the warp is continuously extended through the separation part and the energy shock absorber, and a part of the connecting yarn is part of the first belt part. It is dispersedly arranged between the warps constituting the warp to exhibit a function as a warp, and at the same time, a portion is dispersed among the warps constituting the second belt portion to exhibit a function as a warp.

In addition, in US Patent Laid-Open Publication No. 2008/0179136 (Document 3), it is composed of at least two fractured portions, and at each portion of the fractured portion, at least two sheets of upper and lower portions forming a surface layer and a rear layer extending along the longitudinal direction are overlapped. a belt, an external fracture element passing back and forth in a sinusoidal shape while reciprocating between the attachment point on the surface layer of the belt thereon and the attachment point on the back surface below it; A shock absorbing mechanism for preventing the fall of the human body is described, which reciprocates between the attachment points on the surface of the

ISO standards can be cited as international standards for the impact mitigation performance of impact absorbing mechanisms described in Documents 1 to 3. However, different standards exist due to different standards for each country. In addition, suitable weights and conditions of use that are in demand in each country are classified, and products that satisfy the standards of each applicable weight and conditions of use are manufactured and sold.

Regardless of the standards and classifications common to each country, it is very useful if a single shock absorbing mechanism can cope with a wide range of corresponding masses and conditions of use. not doing

Document 1: Japanese Patent Laid-Open No. 2003-275333 Document 2: Japanese Patent Laid-Open No. 2018-68915 Document 3: US Patent Publication No. 2008/0179136

The present invention provides a shock absorbing mechanism including a belt that is coupled between a safety belt worn on the body by a worker working at height and a structure to absorb the fall load in the event of a worker's fall while preventing the worker from falling over a certain length will do

Specifically, it is an object of the present invention to provide a shock absorbing device that can be used in a wide range of conditions of use with a wide range of body weights of workers regardless of standards and classifications for the shock absorbing device.

The shock absorbing mechanism according to one aspect of the present invention is provided with four or more belts and is configured by sealing the belts to each other with a first joint and a second joint,

A separation region in which the belts are not sewn to each other outside the shock absorbing region and the shock absorbing region formed by the first seam and the second seam sealing the belts as one is provided, and the belts include a weft thread disposed perpendicular to the longitudinal direction, and the impact In the absorbent region, the number of weft yarns lying in the longitudinal direction of the belt through which the first seam passes and the number of weft yarns lying in the longitudinal direction of the belt through which the second seam passes are denoted by a:a and b:b, where a is the first seam is the number of wefts through which the yarn passes, b is the number of wefts through which the second seam passes, a and b are integers greater than or equal to 1 and b > a;

In the separation area, it is separated into a plurality of belts on one side and a plurality of belts on the other side, and in the shock absorbing area, a part of the first joint thread is separated in the separation area and a part of the plurality of belts on one side and a plurality of belts on the other side are sewn. , The remaining part of the first seam is the same as a, the number of weft threads lying in the longitudinal direction of the belt through which the second seam passes in the separation region, and the other part of the plurality of belts on one side and the plurality of belts on the other side are sewn together.

The shock-absorbing belt of the present invention is provided with four belts, in the separation region, two belts and the remaining two belts are separated, and in the shock absorption region, a part of the first joint yarn is separated in the separation region. It is preferable that the belt and one of the inner belts of the two belts on the other side are sewn, and the remaining part of the first seam is configured to sew the inner one of the two belts on one side and the two belts on the other side.

Moreover, in the shock absorbing mechanism of this invention, it is preferable that a is 1 and b is 2 or more.

Further, the shock absorbing mechanism of the present invention may be configured by sutures between two belts in which the first and second joint threads are in contact with each other in the shock absorbing region.

The shock absorbing mechanism of the present invention may be configured to include two separate regions connected to both ends of one shock absorbing region, and may be configured to include two shock absorbing regions connected to both ends of one separate region. .

According to one aspect of the present invention, a new shock absorbing mechanism with shock absorbing properties corresponding to a wide range of body weights of workers and various use conditions is provided.

1 is a cross-sectional view showing the configuration of a shock absorbing mechanism 100 of a first embodiment of the present invention.
2 is a cross-sectional view showing the pattern of the first joint yarn 51 in the shock absorbing mechanism 100 of the first embodiment of the present invention.
3 is a cross-sectional view showing the pattern of the first joint yarn 52 in the shock absorbing mechanism 100 of the first embodiment of the present invention.
4 is a cross-sectional view showing the pattern of the second joint yarn 61 in the shock absorbing mechanism 100 of the first embodiment of the present invention.
5 is a cross-sectional view showing the pattern of the second joint yarn 62 in the shock absorbing mechanism 100 of the first embodiment of the present invention.
6 is a diagram showing the configuration of the shock absorbing mechanism 100 of the first embodiment of the present invention.
Fig. 7 is a diagram showing the configuration of the shock absorbing mechanism 101 of the second embodiment of the present invention.
8 to 11 are drops impact tests performed under the conditions of loads of 100 kg, 110 kg, 120 kg and 130 kg according to JIS T8165:2018 first type standard for the shock absorbing mechanism of the first embodiment of the present invention, respectively. It is a graph showing the result.
12 to 15 are drops impact tests performed under the conditions of loads of 100 kg, 110 kg, 120 kg and 130 kg according to JIS T8165:2018 type 1 standard for the shock absorbing mechanism of the second embodiment of the present invention, respectively. It is a graph showing the result.
16 to 19 are results of a drop impact test performed under the conditions of loads of 100 kg, 110 kg, 120 kg and 130 kg according to JIS T8165:2018 type 2 standard for the shock absorbing mechanism of the second embodiment of the present invention. is a graph representing

The configuration and operation of the shock absorbing mechanism 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6 .

1 and 6 are views showing the configuration of the shock absorbing mechanism 100 according to the first embodiment of the present invention. 5 to 5 show patterns of the first or second joint yarns 51 , 52 , 61 , and 62 in the shock absorbing mechanism 100 .

As shown in FIG. 1 , the shock absorbing mechanism 100 includes a shock absorbing region 110 and separate regions 120 extending from both ends of the shock absorbing region 110 , respectively.

Here, the shock absorbing region 110 and the separation region 120 are formed of an upper belt 121 and a lower belt 122 . The upper belt 121 is composed of two belts of first and second belts 10 and 20, and the lower belt 122 is composed of two belts of the third and fourth belts 30 and 40, have.

In each drawing including FIG. 1 , the weft yarns as the base yarn in the first to fourth belts 10 to 40 constituting the upper belt 121 and the lower belt 122 are shown as squares. In the fourth belt (10 to 40), the inclination as the base yarn disposed in the longitudinal direction is omitted.

In addition, in this specification, the seam yarn is used in the sense of a yarn connecting at least two belts, and in this aspect, it is different from the warp yarn as the base yarn included in the belt.

The 'shock absorbing region' is a region in which the upper belt and the lower belt are sealed to each other by the first or second joint in the shock absorbing mechanism. In addition, the 'separation region' refers to a region other than the impact absorbing region, in which the upper belt and the lower belt are not joined together by the first to fourth seams.

In the shock absorbing mechanism 100 , a load is applied in a direction in which the upper belt 121 and the lower belt 122 are separated from each other in the separation region 120 , and the first joint yarns 51 and 52 in the shock absorbing region 110 . Alternatively, the second joint yarns 61 and 62 are sequentially broken whenever the weft yarns of the first to fourth belts 10 to 40 pass. As a result, the shock received by a worker who is equipped with the shock absorbing mechanism 100 by falling from a height can be effectively absorbed by the shock absorbing mechanism 100 .

In the shock absorbing mechanism 100, each of the first and second joint threads 51, 52, 61, and 62 sews the belts 10 to 40 in the pattern shown in Figs. Accordingly, the density of the joint yarn can be increased or decreased. In FIG. 1 , the weft density in the shock absorbing region 110 is uniformly expressed, but, for example, in an embodiment of the present invention to be described later, the density can be adjusted by suture of the seam.

Specifically, for example, in the first to fourth belts 10 to 40, the weft yarns 11, 21, 31, and 41 are supplied at a constant speed, and the joint yarns 51, 52, 61, 62 and the warp yarns are Density can be controlled by adjusting the feed rate.

For this reason, for example, the density of half of the shock absorbing region 110 may be increased according to a user having a high weight, and the density of the other half of the shock absorbing area 110 may be decreased according to a user having a low weight.

Accordingly, the shock absorbing mechanism 100 according to the embodiment of the present invention can be applied to a wide range of body weight and use conditions.

In addition, by sealing the first to fourth belts 10 to 40 according to the patterns illustrated in FIGS. 2 to 5 , the seams 51 and 61 in the separation region 120 of the shock absorbing mechanism 100 are connected to the upper belt ( Although the first and second belts 10 and 20 constituting the 121) are sewn, the third and fourth belts 30 and 40 constituting the lower belt 122 are not sewn, and the joint threads 52 and 62 are Although the belts 30 and 40 of the lower belt 122 are sewn, the belts 10 and 20 of the upper belt 121 are not sewn. Accordingly, in the separation region 120 , the upper belt 121 and the lower belt 122 are not sealed to each other.

Due to this, in the shock absorbing region 110, the upper belt 121 and the lower belt 122 are sewn, and in the separation region 120, the upper belt 121 and the lower belt 122 are not sealed. 100) is formed.

2 shows a pattern in which the upper first joint yarn 51 is woven on the first to third belts 10 to 30 . The upper first joint yarn 51 seals the second belt 20 and the third belt 30 from the first belt 10 positioned on the upper surface side of the shock absorbing mechanism 100 .

As seen in FIG. 2, if it is seen that the suture is done from left to right, the upper first joint 51 is one end of the upper belt 10 and the second belt 20 in the separation region 120 by sealing the upper belt ( 121).

As shown in FIG. 2 , the upper first seam yarn 51 is the weft yarn 11 of the first belt 10 and the weft yarn 21 of the second belt 20 adjacent to the weft yarn 11 in the longitudinal direction. are sutured one by one, that is, 1:1.

Next, the upper first seam yarn 51 is formed of one weft yarn 11 in the first belt 10 and one weft yarn 31 and the first weft yarn 11 in the third belt 30 adjacent to the weft yarn 11 in the longitudinal direction. 2 By sutured to pass through the belt 20, the weft yarn 11 and the weft yarn 31 are sutured in a 1:1 ratio.

For this reason, the 3rd belt 30 of the lower belt 122 is sewed to the 2nd belt 20 side from the upper belt 121, forming a part of the upper belt 121. And, the upper first seam yarn 51 sews one weft yarn 11 in the first belt 10 and one weft yarn 21 in the second belt 20 1:1, and due to this, the drawing Forms a part of the upper belt 121 on the right side.

Here, the number of weft yarns in the longitudinal direction of the upper belt 121 and the lower belt 122 through which the upper first connecting yarn 51 passes and the upper belt 121 through which the second connecting yarns 61 and 62 pass. and the number of weft yarns in the longitudinal direction of the lower belt 122 is indicated by a:a and b:b.

Here, 'a' is the number of weft yarns through which the first connecting yarns 51 and 52 pass, and 'b' is the number of weft yarns through which the second connecting yarns 61 and 62 pass.

In this embodiment, a is 1 and b is 2, but the present invention is not limited to these numbers, a and b are integers greater than or equal to 1, and it is preferable that b > a.

In addition, in this specification, when a joint thread passes between each weft thread in the longitudinal direction of the belt, it is expressed as 'sew the joint thread in a 1:1 ratio'.

In addition, when a seam yarn passes between a plurality of weft yarns in the longitudinal direction of the belt and a plurality of weft yarns, it is expressed in the same manner using the number of weft yarns. That is, if a joint thread passes through every two weft threads, it is expressed as 'Sew the joint thread at 2:2'.

3 shows a pattern when the lower first joint yarn 52 sews the second to fourth belts 20 to 40 .

The lower first joint 52 seals the third belt 30 and the second belt 20 from the side of the belt 40 positioned on the lower surface of the shock absorbing mechanism 100 . When it is seen that the suture is performed from left to right in the paper of FIG. 3 , the lower first seam 52 forms a part of the lower belt 122 in the separation region 120 . As illustrated in FIG. 3 , here the lower first seam 52 sews the weft yarn 31 of the third belt 30 and the weft yarn 41 of the fourth belt 40 1:1.

Then, the lower first seam 52 is sewn through one weft yarn 41 in the fourth belt 40 and one weft yarn 21 and the third belt 30 in the second belt 20, , the weft thread 21 and the weft thread 41 are sutured 1:1. In this way, a part of the lower belt 122 was formed, and the second belt 20 was sewn on the third belt 30 side of the lower belt 122 .

And, the lower first seam 52 sews one weft yarn 41 in the fourth belt 40 and one weft yarn 31 in the third belt 30 1:1, and due to this, It forms a part of the lower belt 122 on the right side in the drawing.

The upper and lower first joint yarns 51 and 52 shown in FIG. 3 sewed the first to fourth belts 10 to 40 from both surfaces of the upper and lower surfaces of the shock absorbing mechanism 100, respectively.

Specifically, the upper first joint yarn 51 passes through the weft yarn 31 of the third belt 30 bent from the lower side, and the weft yarn 41 of the fourth belt 40 placed on the lower side does not pass through the second Returning to the surface of the first belt 10, it bends and passes through the weft yarn 31 adjacent to the weft yarn 31 in the longitudinal direction of the third belt from below, and under the fourth belt weft yarn 41 placed on the lower side. The furnace is bent and sutured without passing through.

Similarly, the lower first seam yarn 52 passes the weft yarn 21 of the second belt 20 from above, and the weft yarn 11 of the first belt 10 does not pass through the surface of the fourth belt 40 . Returning to, it goes over the weft yarn 21 and the other weft yarn 21 adjacent in the longitudinal direction of the belt again, and the weft yarn 11 of the first belt 10 is bent and sutured in such a way that it does not pass through. .

By repeating this, the second belt 20 and the third belt 30 are sewn with the fourth belt 40 .

4 shows a pattern when one joint 61 placed on the upper side of the second joint threads is woven on the first to fourth belts 10 to 40 . The upper second joint 61 seals all belts from the first belt 10 positioned on the upper surface side to the fourth belt 40 positioned on the lower surface side in the shock absorbing mechanism 100 .

Here, when it is said that the stitching is done from left to right in the paper of FIG. 4 , the upper second joint 61 is the weft yarn 21 of the second belt 20 and the weft yarn 11 of the first belt 10 by 1 Sew at a ratio of 1:1, thereby forming a part of the upper belt 121 as in the case of the first seam 51 .

That is, the upper second connecting yarn 61 forms a part of the upper belt 121 in the separation region 120 like the upper first connecting yarn 51 .

Then, the upper second joint yarn 61 passes through the weft yarn 11 of the first belt 10 and the weft yarn 41 of the fourth belt 40 and the second belt 20 and the fourth belt 30 . Then, the weft yarns 11 and 21 of the upper belt 121 and the weft yarns 31 and 41 of the lower belt 122 are sewn together, specifically, at a 2:2 ratio. Accordingly, all of the first to fourth belts 10 to 40 are sewn while forming a part of the upper belt 121 .

In addition, the upper second seam 61 sews one weft yarn 11 in the first belt 10 and one weft yarn 21 in the second belt 20 1:1 to the upper belt 121 . Forming a part of is the same as the first joint (51).

In this embodiment, the second seam sews the belt in a 2:2 ratio in the separation region, but in this invention, the same effect can be obtained if it is plural: plural. However, 2:2 is the most effective.

5 shows a pattern in which the lower second joint yarn 62 is woven on the first to fourth belts 10 to 40 among the second joint yarns.

The lower second joint 62 is sealing all belts from the fourth belt 40 positioned on the lower surface side to the first belt 10 positioned on the upper surface side in the shock absorbing mechanism 100 .

Here, assuming that suture is performed from left to right in the paper direction of FIG. 5 , the lower second joint 62 is the weft yarn 41 of the fourth belt 40 and the weft yarn 31 of the third belt 30 1 It is the same as that of the lower first seam 52 , which is sutured at 1:1, thereby forming a part of the lower belt 122 . That is, the lower second connecting yarn 62 forms a part of the lower belt 122 in the separation region 120 like the lower first connecting yarn 52 shown in FIG. 3 .

Next, the lower second seam 62 is formed by combining one weft yarn 41 of the fourth belt 40 and one weft yarn 11 of the first belt 10 to the second belt 20 and the third belt ( 30), and the weft yarns 11 and 21 of the upper belt 121 and the weft yarns 21 and 41 of the lower belt 122 were sewn in a plurality of pieces, specifically 2:2.

Then, the lower second seam 62 is 1:1 by stitching one weft yarn 41 from the fourth belt 40 and one weft yarn 31 from the third belt 30 to the upper belt 121 . It is the same as the first joint (52) forming the right part of the.

As shown in FIG. 5 , the upper and lower second joint threads 61 and 62 seal the belts in the upper and lower directions in the shock absorbing mechanism 100 , respectively.

Accordingly, when a load due to a drop impact is applied, the first joint threads 51 and 52 and the second joint threads 61 and 62 are broken at different time points, respectively.

Specifically, when the first joint yarns 51 and 52 located at the leftmost side of the shock absorbing region 110 shown in FIG. 1 are broken, the second joint yarns 61 and 62) does not break.

Due to this, a more sufficient shock is absorbed by the succeeding second connecting yarns 61 and 62, and the first connecting yarns 51 and 52 woven at the next breaking position of the second connecting yarns 61 and 62. It is possible to effectively prevent the weaving from being pulled and untied by breaking the weaving in front of the yarn.

In addition, when the place where the second joint yarns 61 and 62 are woven is broken, the first joint yarns 51 and 52 that are woven at the next broken position are not broken. As a result, the unwinding of the second joint yarns 61 and 62 is effectively prevented in the weaving of the second joint yarns 61 and 62 .

Therefore, in the shock absorbing mechanism 100 according to the first embodiment of the present invention, the first coupling yarns 51 and 52 and the second coupling yarns 61 and 62 are broken so that the upper and lower belts 121 and 122 are connected to each other. When separated, it is possible to prevent the first joint threads 51 and 52 and the second joint threads 61 and 62 from loosening, thereby absorbing the shock in response to a wide range of body weight.

In addition, when each belt is sutured, the shock absorption can be softened by using 1:1 sutures and 2:2 sutures of the seam.

In the shock absorbing mechanism 100 according to the first embodiment of the present invention, the degree of freedom in designing the yarn density is widened.

For example, it is possible to increase the amount of impact that can be absorbed at a high density by providing a shock absorbing region of a limited length. This effectively absorbs a wide range of impacts, and the degree of freedom in design of the range obtained by setting the range of the impact absorption area is improved.

In addition, by suturing each belt with a weft thread of 1:1 and a weft thread of 2:2, shock absorption can be made softer than suturing with only a weft thread of 1:1, and the manufactured article is flexible and thus easy to process. When suturing with only 1:1 weft threads, shock absorption is not smooth.

There is an ISO standard as an international standard for the shock mitigation performance of a shock absorbing mechanism, but in Japan, for example, based on the free fall distance and human impact load obtained according to a predetermined formula, and the length of the shock absorbing mechanism after falling, JIS T8165 :2018 standards have been established.

Based on this standard, in Japan, products under 100 kg and around 130 kg are manufactured and sold for each type 1 (2.3 m or less) and type 2 (4.0 m or less) classified by the maximum free fall distance, that is, use conditions. have.

The shock absorbing mechanism 100 of the first embodiment can satisfy one type and two types of use conditions of the JIS standard for 100 kg or less and 130 kg or less, respectively.

In addition, in the provision of 4.2.2 maximum use mass of JIS T8165:2018, the "maximum use mass of the fall arrester" (the sum of the operator's weight and the mass of the equipment) is the falling object (sand pockets, mannequins, or weights).

The mass of the falling object subjected to this coarse impact and related performance test shall be 85 kg or 100 kg. In addition, it is stipulated that a special falling object is used for people weighing over 100kg, and products weighing 130kg or less are mainly manufactured and sold as a 'special falling object'.

The length of the shock absorbing region 110 in the shock absorbing mechanism 100 may be designed according to the load according to the use conditions and the shock. In addition, the length of the separation region 120 in the shock absorbing mechanism 100 is not limited as long as a ring, which will be described later, can be fastened with sufficient strength.

6 shows a schematic configuration of the shock absorbing mechanism 100 . 6 shows the ends 121A, 121B of the upper belt 121 in the separation region 120 , and the ends 122A and 122B of the lower belt 122 are shown. For example, the shock absorbing mechanism 100 passes the upper belt 121 through a ring such as an 'O' ring or a 'D' ring to seal the ends 121A and 121B, thereby fastening the ring.

As such, it is preferable to pass the lower belt 122 through the ring in the separation region 120 to seal the ends 122A and 122B to the ring. One side of these fastened rings is fastened to the carabiner and fastened to a harness belt, waist belt or auxiliary belt, and the other side is fastened to a lanyard or the like.

In this way, since the shock absorbing mechanism 100 can be coupled to a ring in a separate process after manufacturing it, manufacturing can be simplified, and manufacturing cost can be reduced and ease of management can be improved.

Chemical fibers may be applied to the warp and weft yarns as the base yarns of the first to fourth belts 10 to 40 from the viewpoint of having high coarse impact properties. Examples of the chemical fibers include nylon fibers, aramid fibers, polyester fibers, ultra-high molecular weight polyethylene fibers, liquid crystal polyester fibers, polyarylate fibers, and fibers obtained by combining the chemical fibers.

In particular, it is possible to make the width of the body of the shock absorbing mechanism smaller and thinner while increasing the coarse impact property of the belt. Due to this, from the viewpoint of reducing the weight of the shock absorbing mechanism, chemical fibers are aramid fibers, liquid crystal polyester fibers, and polyarylate fibers. , it is good to use ultra-high molecular polyethylene fibers as the main fibers.

The first to fourth belts 10 to 40 may use a belt woven in plain weave and twill for each sheet, and from the viewpoint of increasing the density of the yarn, it is better to be a belt of plain weave.

In addition, in the first to fourth belts 10 to 40, the warp and weft yarns as the base yarns may be braided or twisted yarns.

In the paper of FIG. 1 , the left first end 110A side of the shock absorbing region 110 corresponds to a high load, and the right second end 110B side corresponds to a low load.

Here, as the yarn density (also referred to as 'straight density') related to each of the high load on the left side and the low load on the right side of the shock absorbing region 110, the right side of the shock absorbing region 110 in the weft yarn is 6.5 peaks/cm or more. and 8.5 peaks/cm or less. The left side of the impact absorbing region 110 is preferably 7.5 peaks/cm or more and 9.5 peaks/cm or less.

In addition, the breaking load (tensile strength) of the chemical fibers in the first to fourth belts 10 to 40 is preferably 5 g/D (denier) or more. In addition, the breaking load (tensile strength) of the warp in the first to fourth belts 10 to 40 is preferably 5 g/D or more and 40 g/D or less.

The length and width of the first to fourth belts 10 to 40 may be designed according to the standards of each country and are not particularly limited.

As the first joint yarns 51 and 52 and the second joint yarns 61 and 62, like the base yarn of the first to fourth belts 10 to 40, for example, nylon fibers, aramid fibers, polyester fibers, Chemical fibers such as ultra-high molecular polyethylene fibers, liquid crystal polyester fibers, and polyarylate fibers may be used.

In particular, it is preferable to use polyester fibers as the first joint yarns 51 and 52 and the second joint yarns 61 and 62 from the viewpoint of requiring a light weight and high coarse impact property. The first and second joint yarns may be braided yarns or twisted yarns. In addition, it is preferable to use a chemical fiber having a strength of 2 to 25 g/D for each of the first and second joints.

At least one of the first joint threads 51 and 52 may be used on the upper surface side and the lower surface side of the shock absorbing mechanism along the inclination of the belt. In addition, each of the first joint yarns 51 and 52 may be sewn on the belt so as to be parallel to each other in the longitudinal direction of the shock absorbing mechanism and parallel to each other along a center line passing through the center in the width direction, or the belt may be sewn on the center line.

Similarly, at least one of the second joint threads 61 and 62 may be used on the upper surface side and the lower surface side of the shock absorbing mechanism 100 along the inclination of the belt. The belt may be sewn so as to be parallel to each other along the center line of the shock absorbing mechanism 100 in the width direction, or the belt may be sewn on the center line.

The shock absorbing mechanism according to the present invention is not limited to the shock absorbing mechanism 100 of the first embodiment described above.

As shown in FIG. 7 , the shock absorbing mechanism 101 of the second embodiment is composed of two shock absorbing regions 110 connected to both ends of one separating region 120 .

In addition, in the shock absorbing mechanism 101, the configuration of each belt, the first connecting thread, the second connecting thread, etc. is the same as that of the shock absorbing mechanism 100 of the first embodiment, so a description thereof will be omitted.

The shock absorbing mechanism 101 of the second embodiment has at least one O-ring (not shown) on each of the upper belt 121 and the lower belt 122 in the separation region 120 positioned between the two shock absorbing regions 110 . time) or a D-ring (not shown) can be attached.

To each ring, as in the case of the shock absorbing mechanism 100 of the first embodiment, a harness belt, a waist belt or an auxiliary belt may be attached in one direction with a carabiner or the like, and a lanyard or the like may be attached in the other direction.

As another embodiment, the shock absorbing mechanism may be composed of three separate regions and two shock absorbing regions, and each separate region may be connected to two shock absorbing regions.

Here, a ring, a harness belt, a lanyard, etc. may be connected in the separation area at both ends of the shock absorbing mechanism in the same manner as in the shock absorbing mechanism 100 of the first embodiment.

The shock absorbing mechanism of the present invention may be composed of at least one shock absorbing region and at least one separating region, and the number of the shock absorbing region and the separating region is not limited. An embodiment comprising, for example, four separate regions and two shock-absorbing regions is also possible.

The shock absorbing mechanism of the present invention may be composed of one separate region and one shock absorbing region. In one separation area, both ends of the upper belt and the lower belt can be fixed and sewn to one harness belt.

This invention is not limited to the form of the embodiment described above, it can be changed in various forms within the range defined by the claim, The embodiment obtained by suitably combining the technical means each disclosed in another embodiment is also the technical scope of this invention included in

The shock absorbing mechanisms of Examples 1 and 2 were produced, and in accordance with the conditions of the shock absorbing mechanisms stipulated in the first and second types in JIS T8165:2018, the masses were 100 kg, 110 kg, 120 kg, and 130 kg. A drop impact test was performed for each condition of

A belt was manufactured with a loom using ultra-high molecular weight polyethylene as a base yarn, and the shock absorbing mechanism of the first embodiment shown in FIG. 1 was manufactured using a joint yarn including polyester fibers.

Further, in the shock-absorbing mechanism of the first embodiment, the first and second seams have an average strength of 6.95 g/D, and in the shock-absorbing region, the density of weft yarns at the first end is 8.2 peak/cm, and the density of weft yarns at the second end in the shock absorption region. is 8.5 peaks/cm. Further, the length of the shock absorbing region of the shock absorbing mechanism of the first embodiment is 800 mm.

In addition, as a second embodiment, a shock absorbing mechanism having a length of a shock absorbing region of 810 mm was manufactured, in which the length of the shock absorbing region was increased by 10 mm compared to that of the first embodiment.

The sizes of the shock absorbing mechanisms of the first and second examples are shown in Table 1 together with the sizes of the following comparative examples 1 to 8 obtained as commercial products.

Correspondence standard corresponding mass mass
(g) body length
(mm) width
(mm) thickness
(mm) first embodiment 1 type 100 kg to 130 kg 80.0 90 37 45 second embodiment 1 type, 2 type combination 100 kg to 130 kg 85.0 90 37 45 Comparative Example 1 1 type 100 kg 139.7 160 31 37 Comparative Example 2 1 type 100 kg 195.0 170 45 30 Comparative Example 3 1 type 130 kg 164.7 160 31 45 Comparative Example 4 1 type 130 kg 199.7 150 31 50 Comparative Example 5 2 types 100 kg 195 160 31 45 Comparative Example 6 2 types 100 kg 260 160 45 40 Comparative Example 7 2 types 130 kg 240 165 31 52 Comparative Example 8 2 types 130 kg 200 135 31 55

In Table 1, the 'corresponding standard' is JIS T8165:2018

As shown in Table 1, it can be confirmed that the shock absorbing mechanism of the first embodiment has a short body length, and weight reduction and miniaturization are achieved compared with the shock absorbing mechanisms of Comparative Examples 1 to 8, which are the first and second types of JIS. can In addition, it can be seen that the weight reduction and miniaturization were achieved in the shock absorbing mechanism of the second embodiment produced for the combined use of JIS type 1 and type 2 compared to the shock absorbing mechanism of Comparative Examples 1 to 8.

Next, in accordance with JIS T8165:2018, set the maximum free-fall distance H = 2.30 m, attach the load cell to the load cell with a connect at the tip of the lanyard equipped with a shock-absorbing mechanism, and attach a weight of 100 kg to free fall. The impact load value at the time of carrying out was measured.

A graph of the time-load in this case is shown in FIG. 8, and the evaluation results are shown in Table 2.

Next, under the same conditions as in Example 1, except for preparing a lanyard equipped with the shock absorption mechanism of Example 1 and changing the weight of 100 kg to a weight of 110 kg, the impact load value was measured with a load gauge. did The time-load graph in this case is shown in FIG. 9 and the evaluation results are shown in Table 2.

Next, the impact load value was measured with a load gauge under the same conditions as in Example 1, except that the same thing as a lanyard equipped with the shock absorption mechanism of Example 1 was prepared, and the 100 kg weight was changed to a 120 kg weight. did The time-load graph in this case is shown in FIG. 10 and the evaluation results are shown in Table 2.

Next, under the same conditions as in Example 1, except for preparing a lanyard equipped with the shock absorption mechanism of Example 1 and changing the weight of 100 kg to a weight of 130 kg, measure the impact load with a load gauge did The time-load graph in this case is shown in FIG. 11 and the evaluation results are shown in Table 2.

Example 1 (JIS T8165:2018 1 type) mass (kg) 100 110 120 130 Maximum impact load (N) 4843.49 4638.97 4525.80 4941.09 Average impact load (≥2200N) 3748.27 3747.62 3719.56 3789.06 Length (m) 2.300 2.300 2.300 2.300 Length after test (m) 3.099 3.192 3.297 3.396 Difference in length before and after the test (m) 0.799 0.892 0.997 1.096

Looking at the average impact load and the difference in length before and after the test, in all drop impact tests for the masses of 100 kg, 110 kg, 120 kg, and 130 kg of the shock absorbing mechanism of Example 1, JIS T8165: 2018 It was confirmed that the standard was satisfied. In addition, it could be confirmed from the graphs of FIGS. 8 to 11 that the shock absorption mechanism of Example 1 smoothly absorbs the shock even in all cases of 100 kg, 110 kg, 120 kg, and 130 kg.

In the shock absorbing mechanism of the second embodiment 2, as in the first embodiment 1, in accordance with one of JIS T8165:2018 under the conditions of using weights of 100 kg, 110 kg, 120 kg, and 130 kg respectively The drop impact test was performed at the maximum free fall distance H = 2.30 m. Table 3 shows the evaluation results of the drop impact test for the shock absorbing mechanism of the second example.

Example 2 (JIS T8165:2018 1 type) mass (kg) 100 110 120 130 Maximum impact load (N) 4722.03 4605.00 4641.80 5209.54 Average impact load (≥2200N) 3721.64 3765.04 3791.32 3857.95 Length before test (m) 2.300 2.300 2.300 2.300 Length after test (m) 3.095 3.183 3.280 3.358 Difference in length before and after the test (m) 0.795 0.883 0.980 1.058

As shown in Table 3, similarly to the shock absorbing mechanism of the first embodiment, the shock absorbing mechanism of the second embodiment has an average impact load of 4.0 kN or less and an elongated length of 1.2 m or less after the test. It was confirmed that the performance was satisfied. In addition, it could be confirmed from the graphs of FIGS. 12 to 15 that the shock absorption mechanism of the second embodiment smoothly absorbs the shock even in all cases of 100 kg, 110 kg, 120 kg, and 130 kg.

In addition, in accordance with two types of JIS T8165:2018, the maximum free fall distance H = A drop impact test was performed at 4.0 m. The results are shown in Table 4.

Example 2 (JIS T8165:2018 2 types) mass (kg) 100 110 120 130 Maximum impact load (N) 4785.09 4839.68 4929.96 4899.29 Average impact load (≥2200N) 4106.33 4105.00 3973.67 4144.45 Length before test (m) 4.000 4.000 4.000 4.000 Length after test (m) 5.240 5.389 5.522 5.665 Difference in length before and after the test (m) 1.240 1.389 1.522 1.665

As shown in Table 4, it was confirmed that the shock absorbing mechanism of Example 2 satisfies the performance stipulated in JIS type 2 in view of the average impact load of 6.0 kN or less and the elongated length after the test of 1.75 m or less.

In addition, it could be confirmed from the graphs of FIGS. 16 to 19 that the shock absorption mechanism of the second embodiment smoothly absorbs the shock even in all cases of 100 kg, 110 kg, 120 kg, and 130 kg.

In addition, from the above results, it was confirmed that the shock absorbing mechanism of Example 2 had performance satisfying both the first and second types of JIS T8165:2018.

Shock Absorber: 100, 101 Belt: 10, 20, 30, 40
1st syllable: 51, 52 2nd syllable: 61, 62
Shock absorption zone: 110 Separation zone: 120
Upper belt: 121 Lower belt: 122

Claims (6)

A shock absorbing mechanism in which four or more belts are provided and the belts are sewn to each other with a first joint and a second joint,
In addition to the shock absorbing region and the shock absorbing region formed by the first joint and the second joint by sealing the belts as one, a separation region in which the belts are not sewn is provided,
The belts comprise weft yarns arranged perpendicular to the longitudinal direction, wherein in the impact absorbing region the number of weft yarns lying in the longitudinal direction of the belt through which the first seam passes and the number of weft yarns lying in the longitudinal direction of the belt through which the second seam passes is a: denoted by a and b:b, where a is the number of weft yarns passed by the first seam, b is the number of weft yarns passed by the second seam, a and b are integers greater than or equal to 1 and b >a;
In the separation area, it is divided into a plurality of belts on one side and a plurality of belts on the other side,
In the shock absorbing region, a portion of the first joint seals a portion of the plurality of belts on the one side and the plurality of belts on the other side separated in the separation region, and the remaining part of the first joint thread includes a portion of the plurality of belts on the one side and the suture the plurality of belts on the other side,
wherein the number of weft yarns lying in the longitudinal direction of the belt through which the second seam passes in the separation region is equal to a. The method according to claim 1,
Four belts are provided, and in the separation area, two belts and the remaining two belts are separated,
In the shock absorbing region, a part of the first seam sews one belt inside of the two belts on one side and the two belts on the other side separated in the separation region, and the remaining part of the first seam thread is one of the two belts on the one side One inner belt and two belts on the other side are sewn together,
wherein the number of weft yarns lying in the longitudinal direction of the belt through which the second seam passes in the separation region is equal to a. The method according to claim 1,
a is 1 and b is 2 or more. The method according to claim 1,
A shock absorbing mechanism in which the first and second joint yarns in the shock absorbing region are configured by sealing the two belts in contact with each other. 5. The method according to any one of claims 1 to 4,
A shock absorbing mechanism comprising two separate regions connected to opposite ends of the one shock absorbing region. 5. The method according to any one of claims 1 to 4,
A shock absorbing mechanism comprising two shock absorbing regions connected to opposite ends of one separate region.

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