WO2018038125A1 - Harness type safety belt - Google Patents

Abstract

The present invention addresses the problem of providing a structure for a harness type safety belt which does not give rise to a constricted sensation when worn, in order to allow the safety belt to be worn appropriately on the body. A harness type safety belt according to the present invention is provided with: a pair of shoulder straps which cross over and extend upward from an upper part of the back of a user, pass over the two shoulders of the user, and extend downward from both shoulders at the front of the user; a pair of thigh straps attached respectively to one end of each of the pair of shoulder straps; a back strap which extends downward from a fastener, to correspond to the middle of the back of the user; and a pair of coupling straps which bifurcate and extend from a lower end of the back strap and which are coupled to the pair of thigh straps. The harness type safety belt is characterized in that an elastic member that is free to expand and contract is disposed in at least one of the pair of shoulder straps, the pair of thigh straps, the back strap or the coupling straps.

Description

Harness type safety belt

The present invention relates to the structure of a harness type safety belt.

Generally, when working at a high place such as a construction site, the user is obliged to wear a safety band to prevent falling. This type of safety belt comprises a body belt attached to the body of the human body, and a rope of a predetermined length connected to the body belt, and operates a locking hook attached to the tip of the rope It is generally used to hang on the parent line at the site. However, since this torso-belt type safety belt is attached to the torso of a human body, tension from the rope is concentrated on the torso, and the suspended posture tends to be unstable. Therefore, belts extending over the shoulders, back and thighs as well as the torso of the human body are provided, and by connecting the rope to the belt on the back, the tension from the rope applied to the human body is dispersed by the belt, There is known a so-called harness type safety belt which stably supports the human body.

Harness type safety belts include a regroup harness (sit harness) that holds the waist and thighs, and a chest harness that holds the chest above the torso, and there is also a so-called full body harness. The full-body harness is also called a "full harness type", and is a type of safety belt that holds the entire body by passing a belt through the thighs and shoulders as well as the trunk. For convenience of explanation, the "full-body harness type safety belt" will be referred to as the "harness type safety belt" or simply the "harness". The harness is superior in that it does not have a fear of falling off when compared with the body belt type, and that the load at the time of crash does not concentrate on the body and that a natural posture can be maintained even when suspended. For this reason, in recent years, the construction site has been widely used in Japan as well.

As such a conventional harness, for example, a type called Y-type is mentioned, and a shoulder belt on each of the user's shoulders, a thigh belt worn so as to be wound around the user's thigh, An upper belt branch member arranged on the upper and lower sides of the back and forking a shoulder belt to both shoulders or converging from the shoulders, a lower belt branch member connected to a thigh belt or a connecting belt, and a lanyard It is configured to have a D ring. In other words, the harness can be said to be a structure mainly composed of belt-like belts wound around the entire body. Each belt employs a wide woven fabric formed of flexible fibers. For example, polyester fiber or nylon fiber is used as the fiber. Further, the belt is provided with a length adjustment tool, and the length adjustment can be performed by folding back and pushing the belt.

In Patent Document 1, a pair of shoulder belts which extend from the left and right to the back of the waist in the wearing state of the user, cross and hang on both shoulders and return substantially to the left and right of the waist on the chest side, A pair of looped thigh belts connected to the belt on the left and right of the waist, extending from the left and right of the waist to both thighs and returning along the base of the thigh to the left and right of the waist, and a chest connecting the left and right shoulder belts on the chest side A harness has been proposed consisting of a belt and a connecting belt connected across the loop at two points on each thigh belt. In patent document 1, it aims at preventing the twist of a belt by the said structure.

JP, 2009-112368, A

For those who work at heights, the harness is for fall protection and protects the body from the impact of a fall if a fall accident occurs. Therefore, the user needs to fasten the belt so as not to get out of the harness.

However, since each belt of the harness is not configured in consideration of the comfort at the time of wearing, the stretchability has not been considered conventionally. That is, for the user, when the harness is tightened too much, since it is cramped to work, the belts tend to be worn loosely, such as adjusting the length of each belt long. In such a situation, for example, an unacceptable gap may occur between the thigh belt and the thigh. That is, due to this gap, the amount of movement of the body at the time of a drop impact becomes longer than expected, causing a problem of increased risk.

The present invention has been made in view of the above-mentioned points, and it is an object of the present invention to provide a structure of a harness type safety belt which does not give a feeling of cramping at the time of wearing in order to perform proper wearing on the body.

The harness type safety belt according to the present invention is connected directly or indirectly at one end side of the shoulder belt with a shoulder belt which extends downward from the shoulders of the user through the shoulders of the user. A harness type safety belt comprising a thigh belt and a back belt integrally formed with or connected to the shoulder belt and extending downward on the back side of the user, the shoulder belt and the thigh belt The present invention is characterized in that the back belt is provided with an expandable telescopic member. Further, the connecting belt may be configured to be connected to the thigh belt from the lower end of the back belt via the lower belt fastener. Also, elastic members may be provided on both the back belt and the thigh belt, or on both the connection belt and the thigh belt. Furthermore, an elastic member may be disposed on each of the back belt, the pair of connecting belts, and the pair of thigh belts.

The elastic member may be an elastic belt. In addition, the telescopic member may include a hollow tubular body in which a crease is formed in the length direction. Further, the hollow tubular body may be formed into a bellows shape in which an elastic belt is passed through the tube and the width of the heel changes in accordance with the expansion and contraction of the elastic belt. In addition, the elastic belt includes a bellows portion having a bellows structure that expands and contracts in a length direction, and binding portions that are bound to both ends of the bellows portion, and the bellows portion is a first woven by non-stretching yarn. A plurality of elastic yarns are configured to be knitted in a length direction in a band including a layer and a second layer, and on the first layer side of the band, the first layer sewing point of the elastic yarn is a band The elastic thread is provided at a plurality of locations in the length direction, and at the second layer side of the strip, a plurality of second layer stitching points of the elastic yarn are provided in the length direction of the strip. The first layer stitching point and the second layer stitching point are alternately arranged, and the first layer sticking point and the second layer stitching point are formed by weaving the elastic yarn in the width direction of the strip. It is characterized in that it is sewed. The bellows portion may restrict the maximum extension length of the telescopic member.

In the harness type safety belt according to the present invention, the shoulder belt, the thigh belt, or the back belt is provided with the stretchable elastic member. According to such a configuration, the burden at the time of work is reduced by reducing the feeling of tightness given at the time of wearing in order to perform the proper wearing on the body. Therefore, it is possible to promote the improvement of the degree of adhesion to the body at the time of wearing, which in turn has the effect of leading to the reduction of a crash accident.

Schematic which shows an example of the harness which concerns on 1st Embodiment. Schematic which shows the modification of the connection structure of a thigh belt and a connection belt. Schematic which shows the modification of the connection structure of a thigh belt and a connection belt. Schematic which shows the modification of the connection structure of a thigh belt and a connection belt. The rear view which shows the state which the user wore the harness which concerns on 1st Embodiment. The side view which shows an example of the expansion-contraction member which concerns on embodiment. The side view which shows the other example of the expansion-contraction member which concerns on embodiment. Schematic which shows an example of the harness which concerns on 2nd Embodiment. The rear view which shows the state which the user wore the harness which concerns on 2nd Embodiment. The side view which shows an example of the elastic member of a thigh belt. The side view which shows the other example of the elastic member of a thigh belt. Schematic which shows an example of the harness which concerns on 3rd Embodiment. The rear view which shows the state which the user wore the harness which concerns on 3rd Embodiment. The side view which shows an example of the expansion-contraction member of a connection belt. The side view which shows the other example of the expansion-contraction member of a connection belt. The schematic diagram which showed an example of the expansion-contraction of a connection belt. The figure which showed the result of the tension test of a connection belt. The figure which showed the result of the tension test of harness cloth. Schematic which shows the modification of the harness which concerns on 3rd Embodiment. The rear view which shows the state which the user wore the modification of the harness concerning a 3rd embodiment. Schematic which shows an example of the harness which concerns on 4th Embodiment. The rear view which shows the state which the user wore the harness which concerns on 4th Embodiment. The side view which shows an example of the elastic member of a thigh belt. The side view which shows an example of the elastic member of a back belt. The side view which shows an example of the expansion-contraction member of a connection belt. The figure which shows a back belt and a state in which a thigh belt slips upwards by the physical exercise of the user who wore the conventional harness. The figure which shows a back belt and a state in which a thigh belt slips upwards by the physical exercise of the user who wore the conventional harness. Schematic which shows a person's standing state. Schematic which shows the crooked state of a human. Schematic which shows the crouched state of a human. The rear view which shows the state which the user wore the harness which concerns on a Y-type modification. The schematic front view which shows the harness which concerns on X-type modification. The schematic front view which shows the harness which concerns on X-type modification. The outline back view showing the harness concerning H type modification. The schematic rear view which shows the harness which concerns on another modification.

Before showing the embodiment, the background of the present invention will be briefly described. As described in the background art, the tendency of the wearer to wear the harness type safety belt loosely is mainly due to the reduction in physical freedom due to the harness type safety belt. That is, as can be easily understood from the example of the clothes, if the jacket is put in the pants and the back extension and bending are repeated several times, the hem of the jacket that has been put out of the pants. This is because the hem is pulled out of the pants every time the spine repeats stretching at each position. Disturbance of the clothing reduces the degree of restraint against flexion of the body as the hem of the jacket is released from the fixation by the pants. That is, the degree of freedom of body movement is increased.

Based on the above, the case of the harness type safety belt will be described. When the harness type safety belt is worn in close contact with the body in the same manner, there is no space between the thigh belt and the thigh or between the belt of the trunk portion and the trunk, which makes bending difficult and causes the spine to If stretched, the belt length adjusted by the length adjustment tool may be forcedly changed.

It is necessary to examine what range the minimum necessary expansion and contraction of the elastic material of the harness type safety belt according to the embodiment of the present invention should be. Therefore, the applicant of the present application measured the relationship between the height and the length of the dorsal muscle at the time of bending for 10 subjects. Specifically, the subjects were 10 subjects with a height of 152 cm to 182 cm, and the length to the base of the neck and the caudal bone of each subject in the upright state and in the state of being crooked and bent forward (referred to as the flexed state) It was measured. Table 1 shows the measurement results of 10 subjects, and the unit is cm. As shown in Table 1, as a result, the difference between the upright state and the bent state was a minimum of 4.5 cm and a maximum of 12 cm.

When the user performs the physical exercise, the results of Table 1 show a difference of at least 4.5 cm to 12 cm. If this difference occurs, the conventional harness type safety belt does not expand or contract, so it is thought that pressure is applied to the human body to give a feeling of tension, or the belt length adjusted by the length adjustment tool is forcibly changed. Be

Next, in carrying out the same verification on the harness provided with the expansion and contraction member, it was searched whether there was a portion other than the back portion that caused discomfort in the mounting. Then it was the thigh that came out as the opinion of many of the subjects. The conventional harness type safety belt has a short length from the buttocks to the thighs, and when the user twists the body left or right, or moves up and down (movement in the up-down direction with height difference such as step or ladder) It was found that the thigh belt and the connecting belt did not extend and contract and caused the phenomenon of tension when they were

In addition, when the thigh was crouched, it was deformed and enlarged due to weight and the like, and was longer than the original length around the thigh (the length of the closed curve). In fact, when measuring around the thigh of the subject of 170 cm among the subjects mentioned above, 52 cm was expanded to 56 cm, and around the thigh of the subject of 181 cm, 58 cm expanded to 64 cm. That is, it was found that when the harness type safety belt is worn on the user's body so as to be in close contact with the body when standing, the thigh belt bites into the thigh when crouched, which gives the user a sense of discomfort. In addition, there is a risk that the thigh belt may bite into the thigh even if the body twists from side to side.

From the above verification, it has been found that, for example, the use of an elastic member at one place for the belt on the back and one place for the belt on the thighs reduces the feeling of tension during dressing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, the same parts are denoted by the same reference numerals and redundant description will be omitted. It should also be noted that the drawings may be exaggerated for the purpose of understanding the invention and are not necessarily drawn to scale. The present invention is not limited to the examples shown below.

First Embodiment
[overall structure]
The first embodiment will be described with reference to FIGS. 1A to 3B. FIG. 1A is a view schematically showing an overall configuration of a harness type safety belt 100. As shown in FIG. FIG. 1A shows one form of each form of a full harness called a so-called Y-type harness. However, the embodiment of the present invention is not limited to this, and can be applied to various full harnesses such as other Y-type harnesses, X-type and H-type harnesses.

As shown in FIG. 1A, the harness type safety belt 100 includes shoulder belts 101A and 101B, thigh belts 102A and 102B, back belt 103, connecting belts 104A and 104B, D ring 107, and upper belt fastener 108. And lower belt fasteners 109 and chest belts 112A, 112B.

The shoulder belt 101A is a belt-like belt having a predetermined length, one end thereof is connected to a thigh belt 102A (described later), and the other end is integrally formed with the back belt 103. The back belt 103 integrally formed with the shoulder belt 101A extends downward from the boundary with the shoulder belt 101A, and is integrally formed with the connecting belt 104B. In the description of the harness type safety belt 100, the shoulder belt 101A, the back belt 103, and the connecting belt 104B are separated by reference numerals for convenience of explanation. That is, it does not mean that each is individually manufactured and integrally connected. However, it is also possible to manufacture each separately and to connect each using arbitrary connection means. The total length of shoulder belt 101A, back belt 103 and connecting belt 104B is the length from the upper surface of the user's shoulder to the center of the thigh, the thickness of the shoulder, and from the lower end of the neck to the center of the buttocks. The length and the length from the center of the buttocks to the center of the thighs, etc., are set according to the physical constitution of the user.

The thigh belt 102A is a belt-like belt having a predetermined length (e.g., a length slightly longer than the length around the user's thigh). As shown in FIG. 1A, a part (for example, an end) of the connection belt 104A is fixed at a predetermined position on the thigh belt 102A. This fixation is, for example, by stitching or adhesion. In addition, about this fixing | fixed part, it illustrates as a connection part 123A in FIG. 1A. A first buckle 124A and a second buckle 125A are respectively provided at both ends of the thigh belt 102A, and the thigh belt 102A wound around the user's thigh by being connected to each other and the user's large A holding state with the thigh is formed. The first buckle 124A and the second buckle 125A are not limited to the aspect of FIG. 1A, but may take other forms. Further, the end of the shoulder belt 101A is connected and fixed to the thigh belt 102A at a position closer to the connecting portion 123A than the second buckle 125A. This fixation also includes, for example, suture and adhesion. As shown in FIGS. 1B to 1D, the end of the connecting belt 104A (connecting belt 104B) may be formed in a ring shape, and the thigh belt 102A may be passed through the ring. At this time, movable fasteners may be provided on both sides of the thigh belt 102A adjacent to a portion intersecting the connection belt 104A, and the relative position of both may be maintained.

The shoulder belt 101B is a belt-like belt having a predetermined length, one end thereof is connected to a thigh belt 102B (described later), and the other end is integrally formed with another back belt not shown. The other back belt (not shown) is located on the back side of the back belt 103 (the back side in FIG. 1A in FIG. 1A) and extends downward from the boundary with the shoulder belt 101B. It is integrally formed with. In the description of the harness type safety belt 100, the shoulder belts 101B and the connecting belts 104A are separated by reference numerals for convenience of explanation as described above. The total length of the shoulder belt 101B, the other back belt (not shown) and the connecting belt 104A is the same as above.

Similar to the thigh belt 102A, the thigh belt 102B is a belt-like belt having a predetermined length, and a part (for example, an end) of the connection belt 104B is fixed in the vicinity of the center in the longitudinal direction Connection part 123B). Further, similarly to the thigh belt 102A, a first buckle 124A and a second buckle 125A are respectively provided at both ends.

Also, the shoulder belts 101A and 101B are connected or connected via the upper belt fasteners 108. Further, the shoulder belt 101A and the back belt 103 integral therewith, and the shoulder belt 101B and the other back belt (not shown) integral therewith are connected or connected via the lower belt fastener 109. The upper belt fastener 108 and the lower belt fastener 109 are each formed with two long holes for passing the belt at an interval up and down. Shoulder belts 101A and 101B (hereinafter referred to as "first belt" and "second belt") are respectively passed through the two elongated holes of the upper belt fastener 108. Similarly, the back belt 103 and other back belts (not shown) are passed through the two slots of the lower belt fastener 109. The boundary between the back belt and the connecting belt, which is conceptually distinguished in the present embodiment, is determined corresponding to the position of the lower belt fastener 109 (for example, the central position of the lower belt fastener 109, etc.).

That is, one of the belts constituting the shoulder belt 101A, the back belt 103 and the connecting belt 104B (hereinafter sometimes referred to as "first belt"), the shoulder belt 101B, the other back belt not shown, and the like It can be said that the harness type safety belt 100 is configured including the other belt (which may hereinafter be described as a "second belt") that constitutes the connection belt 104A. Since the first belt and the second belt are held via the upper belt fastener 108 and the lower belt fastener 109 at positions corresponding to the upper and lower portions of the back of the user, such as the back belt 103, The relative position between the first belt and the second belt is fixed. As described later, the first belt of the harness type safety belt 100 holds the user's right half, and the second belt holds the user's left half.

Each belt may adopt a wide woven fabric formed of flexible fibers. The fibers may be polyester fibers or nylon fibers. In addition, each belt is provided with a length adjustment tool, and the length adjustment can be performed by folding back and pushing the belt. Also, the pair of shoulder belts 101A, 101B may be provided with a shoulder pad at a portion that abuts on the user's shoulder.

The harness type safety belt 100 can be provided with chest belts 112A and 112B connected by a chest portion of the user with a pair of shoulder belts 101A and 101B extending downward from both shoulders on the front side of the user. In addition, the structure connected by the female 113A and male 113B of a chest belt buckle can be taken. A D-ring 107 coupled to the lanyard may be attached to the upper end of the back belt 103 (e.g., a position between the upper belt fastener 108 and the lower belt fastener 109). In the example of FIG. 1, the D-ring 107 is provided below and adjacent to the upper belt fastener 108.

As an example of the above-mentioned composition, the whole composition of the above-mentioned harness type safety belt 100 can be paraphrased as follows.

Reference is made to FIG. 2 showing the wearing state of the harness type safety belt 100. As shown in FIG. 2, the harness type safety belt 100 is bifurcated and extends upward from the upper belt fastener 108 disposed on the back of the user, passing through the user's shoulders, and the front side of the user A pair of shoulder belts 101A and 101B extending downward from both shoulders, a pair of thigh belts 102A and 102B attached to the lower ends of the pair of shoulder belts 101A and 101B, and a central upper back of the user from the upper belt fastener 108 And a pair of connecting belts 104A and 104B which extend from the lower end of the back belt 103 in a bifurcated manner from the lower end of the back belt 103 via the lower belt fasteners 109 and connected to the pair of thigh belts 102A and 102B. Prepare. In the present invention, the “upper back” is a position substantially equidistant from the left and right scapulae, and is the position of the upper belt fastener 108 or the D ring 107.

Further, one ends of the shoulder belts 101A and 101B are fixed to the pair of thigh belts 102A and 102B, respectively. Fixing may be performed by stitching or bonding. On the other hand, the pair of connecting belts 104A, 104B extend in a bifurcated manner through lower belt fasteners 109 and are connected to the pair of thigh belts 102A, 102B.

[Extensible member]
In the first embodiment, an expandable telescopic member 130 is provided on a part of the back belt 103 of the harness type safety belt 100. The elastic members may be similarly provided for other back belts not shown. The elastic member 130 may be provided on any one or a plurality of belts of the pair of shoulder belts 101A and 101B, the pair of thigh belts 102A and 102B, or the connection belts 104A and 104B. Next, the specific configuration of the expandable member 130 will be described.

FIG. 2 is a rear view showing a state in which the user wears the harness type safety belt 100 according to the first embodiment of the present invention. The telescopic member 130 includes a bellows part 131 and a binding part 132. The bellows part 131 has a bellows structure which is expanded and contracted in the length direction (longitudinal direction of the back belt 103 etc.). The bonding portion 132 includes bonding portions 132 which are bonded to both ends in the longitudinal direction of the bellows portion 131 (that is, sandwiching the bellows portion 131) and are connected to the back belt 103. The same applies to an elastic member of a back belt not shown.

FIG. 3 is a schematic side view showing an example of the stretchable member 130 according to the embodiment. FIG. 3A shows the side surface of the expandable member 130 according to the embodiment. As described above, in the stretchable member 130, the bellows portion 131 provided so as to be sandwiched by the binding portion 132 has a bellows structure, and stretches in the length direction.

Further, the bellows part 131 is configured as a band-like body having a first layer and a second layer woven with non-stretching yarn. In this band, a plurality of elastic yarns are inserted in the longitudinal direction and knitted in both the first layer and the second layer. Further, in the first layer of the band-shaped body, there are provided first layer sewing locations which are closed at regular intervals in the width direction with sewing threads. Similarly, in the second layer, a second layer sewing portion closed at regular intervals in the width direction with sewing threads is provided. Thus, when the elastic yarn is contracted, the band forms a peak and valley of the bellows. As the non-stretching yarn, besides nylon, a yarn having a strong tensile force may be selected. Further, as the elastic yarn, in addition to stretch nylon, an elastic synthetic resin or natural rubber may be used. At each sewing position, both ends in the longitudinal direction and both ends in the width direction of the bellows portion 131 may be sewn. The first layer and the second layer of the strip may be sewn into a tubular shape.

On the other hand, FIG. 3B shows a side surface of an expandable member 130 ′ which is a modified example of the expandable member 130. A flat elastic belt, such as a rubber belt, can be used as the elastic member 130 'according to the modification.

In the first embodiment, although the harness type safety belt 1 has the stretchable members 130 disposed on the back belt 103, the stretchable members are provided not on the back belt 103 but only on the pair of connecting belts 104A and 104B. You may For this, refer to the third embodiment.

Second Embodiment
The second embodiment will be described with reference to FIGS. 4 to 6B. FIG. 4 is a view schematically showing the entire configuration of the harness type safety belt 200. As shown in FIG. FIG. 4 shows one form of a Y-type harness. The basic configuration of the harness type safety belt 200 in the second embodiment is the same as the basic configuration of the harness safety band 100 in the first embodiment. Therefore, about the basic composition of harness type safety belt 200, explanation may be omitted. As shown in FIG. 4, the harness type safety belt 200 includes shoulder belts 201A and 201B, thigh belts 202A and 202B, back belt 203, connecting belts 204A and 204B, D ring 207, and upper belt fastener 208. And lower belt fasteners 209 and chest belts 212A, 212B. These are the shoulder belts 101A and 101B, the thigh belts 102A and 102B, the back belt 103, the connecting belts 104A and 104B, the D ring 107, the upper belt fastener 108, and the lower belt in the harness type safety belt 100. The functions of the fasteners 109, the chest belts 112A and 112B, and the respective parts, and the arrangement thereof are the same.

The wearing condition of the harness type safety belt 200 will be described with reference to FIG. FIG. 5 is a rear view showing a state in which the user wears the harness 200 according to the second embodiment. As shown in FIG. 5, the shoulder belts 201A, 201B on the back side of the user are bifurcated upward from the upper belt fastener 208 and extend over both shoulders of the user, and the back belt 203 is the upper belt fastener It extends downward from the center of the back of the user from 208. The connecting belts 204A and 204B are bifurcatedly extended from the lower end of the back belt 203 through the lower belt fasteners 209 and fixed to the thigh belts 202A and 202B.

In the second embodiment, the thigh belts 202A and 202B of the harness type safety belt 200 are provided with expandable members 220A and 220B, respectively. Further, as in the first embodiment, the harness type safety belt 200 is provided with the stretchable member 230 that is stretchable on the back belt 203. The elastic members may be similarly provided for other back belts not shown. In addition, the elastic member may be provided on any of the pair of shoulder belts 201A and 201B or the connecting belts 204A and 204B or a plurality of these belts.

As shown in FIG. 6, the stretchable member 220 </ b> A includes a bellows part 221 </ b> A and a binding part 222 </ b> A. The configurations of the bellows part 221A and the binding part 222A are basically the same as the bellows part 131 and the binding part 132 of the first embodiment. However, although the bellows part 221A also expands and contracts in the length direction, the length direction corresponds to the longitudinal direction of the thigh belt 202A. The telescopic member 220B is the same as the telescopic member 220A. As described above, the stretchable members 220A and 220B provided on the thigh belts 202A and 202B allow the thigh belt to bite into the thighs when the user twists the body or crouchs. It is possible to suppress the situation that gives pleasure. In addition, about the expansion-contraction member 230 and the expansion-contraction member provided in the back belt which is not shown in figure, since it is the same as that of 1st Embodiment, description is abbreviate | omitted.

FIG. 6 is a side view showing an example of telescopic members 220A and 220B according to the present invention. FIG. 6A shows the side surface of the expandable members 220A and 220B according to the second embodiment, but here, the expandable member 220 will be described. As shown to FIG. 6A, the expansion-contraction member 220 is equipped with the structure similar to the expansion-contraction member 130 of 1st Embodiment. Therefore, the detailed description of the configuration is omitted.

On the other hand, FIG. 6B shows a side surface of an expandable member 220 ′ which is a modified example of the expandable member 220. The elastic member 220 'can use a flat elastic belt, such as a rubber belt. In the harness type safety belt 200, stretchable members 220A and 220B are provided on the thigh belts 202A and 202B, respectively. In such a configuration, the thigh belts 202A and 202B may be configured without the connecting buckles (224A, 225A, 224B and 225B). That is, it is also possible to form thigh belts 202A and 202B endlessly (annular ring shape), respectively. In such a configuration, the user can easily wear the thigh belts 202A and 202B on the left and right thighs by expanding the outer diameter by using the elastic stretch of the stretchable members 220A and 220B.

Third Embodiment
The third embodiment will be described in detail with reference to FIGS. 7 to 13B. Note that the third embodiment corresponds to the fact that the belt of the harness needs to be contracted from the buttocks to the thighs when shifting from the crouched state to the crouched state shown in FIG. 18C described later. It is an example.

FIG. 7 is a view schematically showing the entire configuration of the harness type safety belt 300. As shown in FIG. FIG. 7 shows one form of a Y-type harness. The basic configuration of the harness type safety band 300 in the third embodiment is the same as the basic configuration of the harness type safety band 100 in the first embodiment. Therefore, the basic configuration of the harness type safety belt 300 may be omitted. As shown in FIG. 7, the harness type safety belt 300 includes shoulder belts 301A and 301B, thigh belts 302A and 302B, back belts 303, connecting belts 304A and 304B, D-ring 307, and upper belt fasteners 308. And lower belt fasteners 309 and chest belts 312A, 312B. These are the shoulder belts 101A and 101B, the thigh belts 102A and 102B, the back belt 103, the connecting belts 104A and 104B, the D ring 107, the upper belt fastener 108, and the lower belt in the harness type safety belt 100. The functions of the fasteners 109, the chest belts 112A and 112B, and the respective parts, and the arrangement thereof are the same.

The wearing state of the harness type safety belt 300 will be described with reference to FIG. FIG. 8 is a rear view showing a state in which the user wears the harness type safety belt 300 according to the third embodiment. As shown in FIG. 8, the shoulder belts 301A, 301B on the back side of the user are bifurcated upward from the upper belt fastener 308 and extend over both shoulders of the user, and the back belt 303 is the upper belt fastener 308. Extending downward from the center of the back of the user. The connecting belts 304A and 304B are bifurcatedly extended from the lower end of the back belt 303 via the lower belt fasteners 309 and fixed to the thigh belts 302A and 302B.

In the third embodiment, the connecting belts 304A and 304B of the harness type safety belt 300 are provided with expandable members 340A and 340B, respectively.

Further, in the harness type safety belt 300, stretchable elastic members 320A, 320B may be provided on the thigh belts 302A, 302B. Further, in the third embodiment, as in the second embodiment, the harness type safety belt 300 can also be provided with an elastic member that can expand and contract on the back belt 303 and the back belt (not shown). The elastic members may be provided on the pair of shoulder belts 301A and 301B.

The stretchable member 320A includes a bellows part 321A and a binding part 322A. The configuration of the bellows part 321A and the binding part 322A is basically the same as that of the bellows part 221A and the binding part 222A of the second embodiment. The stretchable member 320B is similar to the stretchable member 320A. Thus, by providing the stretchable members 320A and 320B on the thigh belts 302A and 302B, respectively, the thigh belt bites into the thigh when the user twists the body left or right or crouchs. It is possible to suppress situations that cause discomfort.

Further, as shown in FIG. 9A, in the harness type safety belt 300, the connection belts 304A, 304B are provided with expandable members 340A, 340B. The telescopic member 340A includes a bellows part 341A and a binding part 342A. The configurations of the bellows part 341A and the binding part 342A are basically the same as the bellows part 131 and the binding part 132 of the first embodiment. However, although the bellows part 341A also expands and contracts in the length direction, the length direction corresponds to the longitudinal direction of the connecting belt 304A. The expandable member 340B is similar to the expandable member 340A. As described above, by providing the stretchable expandable members 340A and 340B on the pair of connection belts 304A and 304B, the phenomenon that the belt stretches from the thigh to the buttocks or the thigh belt to the thigh when crouched It is possible to correct the bite.

On the other hand, FIG. 9B shows a side surface of an expandable member 340 'which is a modified example of the expandable member 340. The elastic member 340 'can use a flat elastic belt, such as a rubber belt. In the harness type safety belt 300, stretchable members 320A and 320B are provided on the thigh belts 302A and 302B, respectively. In such a configuration, it is possible to adopt a configuration in which the thigh belts 302A and 302B are not provided with buckles (324A, 325A, 324B and 325B) for connection. That is, it is also possible to form thigh belts 302A and 302B endlessly (annular ring), respectively. In such a configuration, the user can easily wear the thigh belts 302A and 302B on the left and right thighs by expanding the outer diameter using the elastic expansion and contraction of the elastic members 320A and 320B.

The elastic member 340 disposed on the connecting belts 304A and 304B will be examined. By providing the stretchable member 340 at a position where the stretchable belts 304A and 304B are easily stretchable rather than using the entire stretchable belts 304A and 304B as the stretchable members 340, the safety of the harness type safety belt is improved in the area where stretch is unnecessary. In addition, it is thought that the cramped feeling at the time of wearing can be reduced in the place where expansion and contraction are required. However, since it is not clear which part is easy to stretch, a demonstration experiment was conducted on a subject who is 173 cm tall and has a length of 75 cm from the base of the neck to the tail bone. The results of this demonstration experiment are shown in FIG. For the subject, the base of the neck is near the position of the upper end portion (upper belt fastener 308) of the back belt 303 of the harness type safety belt, and the tail bone is the lower end portion of the connecting belts 304A and 304B (a pair of connecting belts It was near the position of the connection part of 304A, 304B and a pair of thigh belts 302A, 302B. When the back belt 303 and the connecting belt 304A are one belt, the connecting portion may be, for example, the middle position of the lower belt fastener 309 or the upper side of the lower belt fastener 309 (upper belt fastener 308 side The neighborhood position of) corresponds.

As shown in FIG. 10, the length from the base of the subject's neck to the coccyx was 85 cm when the subject bent and was 10 cm longer. And in the area | region (1st area | region) to 35 cm from the base of the neck, it did not extend. That is, when the position of the upper belt fastener 308 on the back belt 303 is the upper end, and the position of the connection portion between the pair of connecting belts 304A and 304B and the pair of thigh belts 302A and 302B is the lower end, 40/75 from the lower end. The area within 53 53% was elongated by 10 cm.

From the results shown in FIG. 10, assuming that the middle position of the upper belt fastener 308 in the back belt 303 is the “upper end” and the above connecting portion (eg, the middle position of the lower belt fastener 309) is the “lower end”, It was considered preferable that the stretchable member be provided in a region where the ratio of the distance from the lower end to the distance from the lower end to the upper end is 53% or less. The distance from the lower end of the expandable member means the distance from the lower end to the middle position in the longitudinal direction of the expandable member or the distance from the lower end to the position of the lower end of the expandable member.

Also, as shown in FIG. 10, with respect to the 10 cm stretch, 4 cm stretch was confirmed in the region 20 cm from the coccyx (third region), while in the region 20 cm to 40 cm from the caudal bone (second region) 6 cm stretch was confirmed. That is, large expansion and contraction was confirmed in the region of 20/757527% or more from the lower end of the pair of connection belts 304A and 304B.

From this result, the position of the upper belt fastener 308 on the back belt is the upper end, and the connecting portion between the pair of connecting belts 304A and 304B and the pair of thigh belts 302A and 302B (for example, the middle position or lower belt of the lower belt fastener 309) Preferably, the telescopic member 340 is provided in a region where the ratio of the distance from the lower end to the distance from the lower end to the upper end is 27% to 53%, where it was thought.

Further, as already shown in Table 1, it was confirmed that the pair of connecting belts 304A, 304B needs to be stretched at least about 4.5 / 46 ≒ 10%. In addition, this numerical value "4.5" is a numerical value showing the "difference" of the measurement result of the subject with a height of 152 cm in Table 1, and "46" is the length to the base of the neck and caudal bone in the upright state. Indicates the measured value. In addition, it was confirmed that the connecting belts 304A and 304B need to be stretched at a maximum of about 12/67 ≒ 18% (refer to the measurement result of the subject with a height of 181 cm). That is, it was considered preferable that the stretchable members provided on the pair of connection belts 304A and 304B be configured to be able to extend the connection belts 304A and 304B by 10% to 18% in the extending direction of the connection belts. .

The stretchable member 340 is considered to preferably include a material (elastic member) that is elastically deformed so as to be contracted when the user stands up and extended when bent. However, if the elastic member is easily stretched (loose), the safety of the harness may be impaired. On the other hand, if the elastic member does not stretch easily, it may not be possible to suppress the feeling of cramping when worn. Then, in order to investigate the elastic member most suitable for the expansion-contraction member 340, a demonstration experiment was conducted. First, various elastic members were applied to the connecting belt, and a questionnaire was given to 10 test subjects to select an elastic member which was not loose and which hardly felt a feeling of tightness. Subsequently, the relationship between the elongation and the force of the selected elastic member and harness fabric was measured by a tensile test under the following conditions. The results are shown in FIG. 11 and FIG.
<Test conditions>
Testing machine: Autograph (manufactured by Shimadzu Corporation, model AG-IS 50-KN)
Temperature 10 degrees Humidity 20%
Objects to be measured: 1. Elastic member (length 60 mm)
2. Harness fabric (60 mm in length)

As shown in FIG. 11, the elastic member is required to have a static load of 5 N to 25 N necessary for stretching 45 mm (Table 1: minimum value of difference) and 120 mm (Table 1: maximum value of difference). The static load required for the movement was 30N to 50N. In detail, in the elastic member, the static load F (N) necessary for extending the length ΔL (mm) in the range of 45 mm to 120 mm satisfies the relationship of the following formula (1).
[Equation 1]
ΔL / 3-10 ≦ F ≦ ΔL / 3 + 10 formula (1)

On the other hand, as shown in FIG. 12, in the above-mentioned harness fabric, the static load required to elongate by 80 mm is about 55 kN, and it becomes clear that it hardly expands as compared with the above-mentioned elastic member. That is, it has been found that it is not necessary to consider the expansion and contraction of the harness cloth in evaluating the expansion and contraction member.

From the results of the tensile test (see FIG. 11) on the elastic members selected as a result of the questionnaire and not feeling a sense of cramping feeling (see FIG. 11) and the tensile test on the harness fabric (see FIG. 12) It was thought that the stretchable member 340 was not loose and that it was difficult to feel a feeling of tightness. That is, the elastic member 340 has a static load of 5 N to 25 N required to expand 45 mm and a static load of 30 N to 50 N necessary to extend 120 mm. When such an elastic member 340 is used, even when the harness type safety belt is attached in close contact, the feeling of tightness can be reduced, and therefore the situation where the harness type safety belt is loosely mounted can be suppressed. . As a result, the safety of the harness type safety belt is improved. In other words, in the elastic member 340, the static load F (N) necessary for extending the length ΔL (mm) in the range of 45 mm to 120 mm satisfies the relationship of the above equation (1). Furthermore, since the harness fabric hardly stretches as compared with the elastic member, it is considered that the maximum extension length of the stretchable member can be regulated, for example, by knitting the elastic member into the harness fabric.

Subsequently, the elastic members 320A and 320B disposed on the thigh belts 302A and 302B will be examined. As described above, when measuring around the thigh of the subject of 170 cm, 52 cm was expanded to 56 cm, and around the thigh of the subject of 181 cm, 58 cm expanded to 64 cm. Further, in any of the test subjects, a large extension was confirmed on the back side (the buttocks) side than on the front side of the user. From this, it was considered preferable that the stretchable members 320A and 320B in the thigh belts 302A and 302B be provided on the buttocks side of the user.

When an elastically deformable elastic member is used as the stretchable member of the harness type safety belt 300, characteristics required of the elastic member will be examined. Such an elastic member is considered to be extended about 80 mm when the length of the elastic member is 60 mm and a load of 17 N is applied, based on the above-mentioned equation (1). On the other hand, as an elastic member of the harness type safety belt, even if it is repeatedly extended and contracted, a restoring force with a small change in shape is required. The restorative force is considered to be influenced not only by physical properties such as Young's modulus of the elastic member but also by shape and the like. Therefore, demonstration experiments were conducted using elastic members of various types and shapes.

First, five types of rubber A to E were selected, and each was processed into the following shape. Then, a load of 17 N was applied to each rubber, and the stretched length of the rubber was measured. The measurement was performed 10 times, and the average value was calculated. The results are shown in Table 2.
<Shape of rubber>
Flat type: Thickness 0.5 mm × width 12 mm, length 60 mm
String shape: outer diameter 2.5 mm, length 60 mm
Linear: outer diameter 0.5 mm, length 60 mm

If based on the above-mentioned formula (1), the length of the elastic member is 60 mm, and it is considered that the elastic member extending about 80 mm when a load of 17 N is applied is preferable, so It was considered that seven cords or seven were preferred.

Subsequently, the resilience of 7 strings and 7 strings was examined. The type of rubber was C, and seven cord-like or linear members were cut into 400 mm, and the action of extending and returning the final 10000 times was repeated, and the length of the elastic member at no load was measured every 2000 times. The results are shown in Table 3.

From the results shown in Table 3, it was found that it is preferable that the elastic member is constituted of a plurality of linear members, in particular that it is preferably constituted of 7 linear members having an outer diameter of 0.5 mm. That is, the elastic member is preferably constituted by seven linear members having an outer diameter of 0.5 mm, and it was considered that an expandable member having a high restoring force can be obtained.

The elastic member 340 of the harness type safety belt 300 configured as described above has the upper belt fastener 308 at the upper end of the back belt 303 as the upper end, and the pair of connecting belts 304A, 304B and the pair of thigh belts 302A, 302B The ratio of the distance from the lower end to the distance from the lower end to the upper end is provided in an area within 53% when the position of the connection portion of the lower end is the lower end. By providing the elastic member 340 in this area, the safety of the harness type safety belt 300 is improved in the area where the expansion and contraction is unnecessary, and the cramping feeling at the time of wearing is reduced at the portions where the expansion and contraction of the pair of connection belts 304A and 304B are required. it can.

When the position of the upper belt fastener 308 on the back belt 303 is the upper end, and the position of the connection portion between the pair of connecting belts 304A and 304B and the pair of thigh belts 302A and 302B is the lower end, the stretchable member 340 The ratio of the distance from the lower end to the distance from the lower end to the upper end is provided in an area of 27% to 53%. By providing the stretchable member 340 in this area, it is possible to further reduce the feeling of cramping at the time of wearing the connecting belts 304A and 304B at the place where the expansion and contraction are required, and the adhesion to the body is secured in the area where the expansion and contraction is unnecessary. The safety of the mold safety band 300 is further improved.

The stretchable members 340 provided on the pair of connection belts 304A and 304B are configured to be able to extend the connection belts 304A and 304B by 10% to 18% in the direction in which the connection belts 304A and 304B extend. By the stretchable member 340 extending in this range, the safety of the harness type safety belt 300 can be improved, and the feeling of tightness at the time of wearing can be reduced.

The elastic members 340 provided on the connecting belts 304A and 304B have a static load of 5N to 25N required to extend 45 mm, and have a static load required to extend 120 mm of 30N to 50N. Since the force required to extend the stretchable member by 45 mm or 120 mm is in the above range, the feeling of buckling can be reduced even when the harness type safety belt is attached closely and thus the harness type safety belt It is possible to control the situation in which the As a result, it is possible to achieve both the improvement of the safety of the harness type safety belt 500 and the reduction of the feeling of cramping at the time of wearing, which are not compatible with each other conventionally.

Further, in the stretchable member 340 provided on the connection belts 304A and 304B, the static load F (N) necessary for extending the length ΔL (mm) in the range of 45 mm to 120 mm satisfies the relationship of the above equation (1) . The force required to extend the stretchable member 340 by 45 mm to 120 mm is within the range of the above equation (1), so that the cramping feeling can be reduced even when the harness type safety belt is attached closely. The situation where the harness type safety belt is worn loose can be suppressed. As a result, it is possible to achieve both the improvement of the safety of the harness type safety belt 500 and the reduction of the feeling of cramping at the time of wearing, which are not compatible with each other conventionally.

The stretchable members 320A and 320B provided on the thigh belts 302A and 302B are disposed on the buttocks side of the user. By providing the stretchable members 320A and 320B on the buttocks side of the user, it is possible to further reduce the feeling of cramping at the time of wearing the thigh belts 302A and 302B at the place where the stretch is necessary. Is secured, and the safety of the harness type safety belt 300 is further improved.

Further, the stretchable member 340 includes an elastically deformable elastic member, and the elastic member is formed of a plurality of linear members. The elastic member is constituted by seven linear members having an outer diameter of 0.5 mm. As a result, it is possible to obtain the stretchable member 340 having the stretchability and the restoring force appropriate for the harness type safety belt 300.

A modification of the harness type safety belt according to the third embodiment will be described with reference to FIGS. 13A and 13B. The harness type safety band 500 according to the modification of the third embodiment differs from the harness type safety band 300 according to the third embodiment in that the stretchable member is disposed on the back belt instead of the pair of connection belts. The other configuration of the harness type safety belt 500 is the same as that of the harness type safety belt 300.

The harness type safety belt 500 includes shoulder belts 501A and 501B, thigh belts 502A and 502B, back belt 503, connection belts 504A and 504B, D-ring 507, upper belt fastener 508, and lower belt fastener And 509 and chest belts 512A and 512B. These are the shoulder belts 101A and 101B, the thigh belts 102A and 102B, the back belt 103, the connecting belts 104A and 104B, the D ring 107, the upper belt fastener 108, and the lower belt in the harness type safety belt 100. The functions of the fasteners 109, the chest belts 112A and 112B, and the respective parts, and the arrangement thereof are the same. Therefore I will omit the explanation. The stretchable members 520A, 520B, 530 are provided on the pair of thigh belts 502A, 502B and the back belt 503, respectively. The telescopic members may be provided on the pair of shoulder belts 501A and 501B.

The elastic members 520A, 520B, 530 are, for example, elastic belts. The telescopic members 520A, 520B, and 530 have the same configuration as that described above and the position in each belt. Therefore, the explanation of the specific configuration is omitted.

The elastic member 530 of the harness type safety belt 500 has the upper belt fastener 508 at the upper end of the back belt 503 as the upper end, and the lower end of the connecting portion between the pair of connecting belts 504A, 504B and the pair of thigh belts 502A, 502B. When this is done, the ratio of the distance from the lower end to the distance from the lower end to the upper end is provided in an area within 53%. By providing the elastic member 530 in this area, the safety of the harness type safety belt 500 can be improved in the area where the expansion and contraction is unnecessary, and the crush feeling at the time of wearing can be reduced in the portion where the expansion and contraction of the back belt 503 is necessary.

The elastic member 530 provided on the back belt 503 is configured to be able to extend the back belt 503 by 10% to 18% in the direction in which the back belt 503 extends. By the stretchable member 530 extending in this range, the safety of the harness type safety belt 500 can be improved, and the feeling of tightness at the time of wearing can be reduced.

Fourth Embodiment
The fourth embodiment will be described with reference to FIGS. 14 to 16C. FIG. 14 is a diagram schematically showing the entire configuration of the harness type safety band 400. As shown in FIG. As shown in FIG. 14, the harness type safety belt 400 according to the fourth embodiment includes shoulder belts 401A and 401B, thigh belts 402A and 402B, back belt 403, connection belts 404A and 404B, and D ring 407. , Upper belt fasteners 408, lower belt fasteners 409, and chest belts 412A, 412B. These are the shoulder belts 101A and 101B, the thigh belts 102A and 102B, the back belt 103, the connecting belts 104A and 104B, the D ring 107, the upper belt fastener 108, and the lower belt in the harness type safety belt 100. The functions of the fasteners 109, the chest belts 112A and 112B, and the respective parts, and the arrangement thereof are the same. Therefore I will omit the explanation.

Refer to FIG. FIG. 15 is a rear view showing a state in which the user wears the harness 400 according to the fourth embodiment. As shown in FIG. 15, shoulder belts 401A and 401B on the back side of the user are bifurcated upward from the upper belt fastener 408 and extend over both shoulders of the user, and the back belt 403 is the upper belt fastener It extends downward from the center of the back of the user from 408. The connecting belts 404A and 404B are bifurcatedly extended from the lower end of the back belt 403 through the lower belt fasteners 409 and fixed to the thigh belts 402A and 402B.

In the fourth embodiment, the harness type safety belt 400 illustrates the pair of thigh belts 402A and 402B, the stretchable elastic members 420A and 420B, the stretchable member 430 on the back belt 403, and the unillustrated back belt. Telescopic members 440A and 440B are provided on the connecting belts 404A and 404B.

Please refer to FIG. FIG. 16A is a side view showing an example of telescopic members 420A, 420B according to the present invention, (b) an telescopic member 430, and (c) telescopic members 440A, 440B. As shown in FIG. 16A, the stretchable member 420A includes a bellows part 421A and a binding part 422A. The configuration of the bellows part 421A and the binding part 422A is basically the same as that of the bellows part 221A and the binding part 222A of the second embodiment. The stretchable member 420B is the same as the stretchable member 420A. Thus, by providing the stretchable members 420A and 420B on the thigh belts 402A and 402B, respectively, the thigh belt bites into the thighs and does not bite when the user twists the body left or right or crouchs. It is possible to suppress the situation that gives pleasure.

Referring to FIG. 16B, the stretchable member 430 includes a bellows portion 431 having a bellows structure that extends and contracts in the length direction at the center, and a binding portion 432 which is bonded to both ends of the bellows portion 431 and connected to the back belt 403. Have.

Referring to FIG. 16C, the elastic members 440A and 440B are connected to the bellows 441A and 441B having a bellows structure expanding and contracting in the length direction at the center and both ends of the bellows 441A and 441B and connected to the back belt 403. Bonding portions 442A and 442B are provided. As described above, by providing the stretchable elastic members 440A and 440B on the connection belts 404A and 404B, it is possible to correct the phenomenon in which the belt of the harness stretches when it is crouched and biting of the belt into the thigh.

As described above, the stretchable members 420A, 420B, 430, 440A, and 440B have the same configuration and arrangement as the stretchable members 220A, 220B, 130, 340A, and 340B described above. Therefore, I omit specific explanation.

The elastic member 430 of the harness type safety belt 400 has the upper belt fastener 408 at the upper end of the back belt 403 as the upper end, and the lower end of the connecting portion between the pair of connecting belts 404A, 404B and the pair of thigh belts 402A, 402B. When this is done, the ratio of the distance from the lower end to the distance from the lower end to the upper end is provided in an area within 53%. By providing the elastic member 430 in this area, the safety of the harness type safety belt 400 can be improved in the area where the expansion and contraction is unnecessary, and the crush feeling at the time of wearing can be reduced in the portion where the expansion and contraction of the back belt 403 is necessary.

In addition, the elastic member 430 provided on the back belt 403 is configured to be able to extend the back belt 403 by 10% to 18% in the direction in which the back belt 503 extends. By the extension / contraction member 430 extending in this range, the safety of the harness type safety belt 400 can be improved, and the feeling of tightness at the time of wearing can be reduced.

[effect]
In describing the effects of the present embodiment, the tendency of the conventional harness type safety belt will be described with reference to FIGS. 17A and 17B and FIGS. 18A to 18C. FIGS. 17A and 17B are views showing how a back belt and a thigh belt shift upward due to physical exercise of a user wearing a conventional harness. FIG. 17A shows a state in which the user O wears a conventional harness and straightens his or her back. The user O wears the shoulder belt 1, the back belt 3 and the thigh belt 2 tightly. FIG. 17B shows a state in which the user O is working while bending forward. When the user adjusts the length of each belt and loosens it, when the user is in the forward bending position, the back belt is pulled up and the thigh belt connected to the back belt is lifted up above the thigh for comfort There is a problem that it interferes with various work activities.

In this case, since each belt is tightly tightened to the body, when it is bent forward, the back belt 3 is lifted in the direction of the arrow, that is, in the upward direction. Then, the thigh belt 2 connected to the back belt 3 is also pulled up in the direction of the arrow. That is, the thigh belt 2 bites into the user O's thigh or the shoulder strap 1 bites into the user O's shoulder.

FIG. 18A shows a standing state, FIG. 18B shows a bent state, and FIG. 18C shows a crooked state. As shown in FIG. 18B, when the human bends forward, the back becomes rounded. That is, the thick line portion B extends. Further, as shown in FIG. 18C, when the human squats down, the thighs and the buttocks are rounded, so that a thick line portion H extends. That is, it can be confirmed that the belt of the harness needs to be contracted in the portion from the buttocks to the thighs when the bending state is shifted to the crouched state in the degree of bending.

As described above, the back belt and thigh belts are caused by upswing due to regular or irregular physical movement, and if the belt length is adjusted, the physical movement The resulting upward force of the back belt can be suppressed by the thigh belt attached to the thigh, but conversely, it restricts the free movement of the physical movement and significantly reduces the feeling of wearing It will be said.

On the other hand, in the above-mentioned embodiment, the elastic member which can be expanded-contracted was provided to a shoulder belt, a thigh belt, a connection belt, a back belt, or arbitrary combination, respectively. According to such a configuration, the burden at the time of work is reduced by reducing the feeling of tightness given at the time of wearing in order to perform the proper wearing on the body. Therefore, it is possible to promote the improvement of the degree of adhesion to the body at the time of wearing, which in turn has the effect of leading to the reduction of a crash accident.

In the conventional harness type safety belt, there is also a possibility that the wearing of the harness type safety belt may be avoided by disliking the crampedness at the time of wearing. There was also a situation where safety belts that are not full harnesses and safety belts themselves were not actually installed. On the other hand, in the harness type safety belt of this embodiment, since the feeling of cramping given at the time of wearing is reduced, the installation of the full harness can be promoted, and the installation rate of the full harness can also be improved. It is.

The harness type safety belt can also play a role as a suspender for work clothes worn on the lower body, and in the configuration in which an elastic member is provided on either or both of the thigh belt and the connection belt, the function of the suspender is impaired. It is possible to achieve the above effect without

In addition, the appropriate length of the elastic member obtained by the demonstration experiment maximized the functionality of the harness and enabled the security of safety. Therefore, the harness type safety belt according to the above embodiment is easy to move, and has the effect of significantly reducing the risk of being caught by another structure or the like.

[Modification]
Note that, as described at the beginning of the first embodiment, the modifications and additional embodiments described in the first to fourth embodiments and each description are one of the forms of a full harness called a so-called Y-type harness. It is shown. However, the modifications and additional embodiments described in the first to fourth embodiments and the respective descriptions are not limited to this, and are applied to various full harnesses such as other Y-type harnesses, X-type and H-type harnesses. It is possible. The outline of the basic configuration of various full harnesses such as other Y-type harnesses, X-type and H-type harnesses will be described below.

[Y-type modification]
FIG. 19 is a rear view showing a state in which the user wears the harness according to the Y-shaped modification. As shown in FIG. 19, the harness type safety belt 300Y includes shoulder belts 301AY, 301BY, thigh belts 302AY, 302BY, back belt 303Y, connecting belts 304AY, 304BY, D-ring 307Y, and upper belt fasteners. A lower belt fastener 309Y and chest belts 312AY and 312BY are provided. In the harness type safety belt 300Y, the shoulder belt is separated from the back belt 303Y instead of being integral with the back belt 303Y and is connected via the upper belt fastener 308Y. In addition, the back belt 303Y is separated from the connecting belts 304AY and 304BY without being integral with the connection belts 304AY and 304BY, and may be connected via the lower belt fastener 309Y.

In the upper belt fastener 308Y and the lower belt fastener 309Y, two long holes for passing the belt are formed at intervals in the vertical direction. Shoulder belts 301AY and 301BY are passed through and crossed at the upper elongated holes of the upper belt fasteners 308Y. In the example of FIG. 19, the shoulder belts 301AY and 301BY are shown to be bifurcated to the right and left shoulder sides of the user through the upper long holes of the upper belt fasteners 308Y. ing. In the example of this figure, shoulder belts 301AY and 301BY are one belt. In addition, the shoulder belts 301AY and 301BY are stitched together at the upper long holes of the upper belt fasteners 308Y, and their positions are fixed with respect to the whole and with respect to the back belt 303Y. One end of the back belt 303Y is folded back through the lower long hole of the upper belt fastener 308Y and sewn at a position slightly closer to the lower belt fastener 309Y.

Furthermore, a back belt 303Y is passed through the upper long hole of the lower belt fastener 309Y. The other end of the back belt 303Y is folded back through the upper long hole of the lower belt fastener 309Y and is passed through a belt adjuster provided at a position on the upper belt fastener 308Y. The upper end of the connecting belts 304AY and 304BY is passed through the lower long hole of the lower belt fastener 309Y.

In the present Y-shaped modification, the connecting belts 304AY and 304BY of the harness type safety belt 300Y are provided with expandable members 340AY and 340BY, respectively. In the harness type safety belt 300Y, stretchable stretch members 320AY and 320BY are provided on the thigh belts 302AY and 302BY. The configuration, arrangement position and the like of these expandable members are the same as the configuration of the third embodiment. Therefore, it is possible to apply this Y type modification to each additional embodiment or modification of a 3rd embodiment.

[X-type modification]
FIG. 20A is a schematic front view showing a harness according to an X-type modification. As shown in FIG. 20A, the harness type safety belt 300X includes shoulder belts 301AX and 301BX, thigh belts 302AX and 302BX, back belts 3031X, back belts 3032X, connecting belts 304AX and 304BX, and a D-ring (not shown). And upper belt fasteners 308X, lower belt fasteners 3091X and 3092X, and chest belts 312AX and 312BX. In the harness type safety belt 300X, the common point with the first to fourth embodiments is that the shoulder belt 301AX is a single belt integrally formed with the back belt 3031X and the connection belt 304BX. The other belt 301BX is a back belt 3021X and another belt integrally formed with the connecting belt 304AX.

The difference is that in the first to fourth embodiments, the back belts overlap in the front-rear direction of the user, but in the X-type modification, the left and right directions of the upper belt fastener 308X Branched to the reference). Also, a connecting belt is provided so as to be bridged between the two back belts. This is provided slightly below the upper belt fastener 308X (based on the user's foot and foot direction) and at a position substantially corresponding to the back of the user's chest.

Further, the shoulder belt 301AX and the back belt 3031X are held in relative positions by the lower belt fasteners 3091X. Unlike the first to fourth embodiments, the lower belt fastener 3091X is provided at a position corresponding to a position adjacent to the user's waist right side or above or below. Similarly, the shoulder belt 301BX and the back belt 3032X are held in relative positions by the lower belt fasteners 3092X. The lower belt fastener 3092X is provided at a position corresponding to a position adjacent to or above or below the user's waist.

In the present X-type modification, the connection belts 304AX and 304BX of the harness type safety belt 300X are provided with expandable members 340AX and 340BX, respectively. In the harness type safety belt 300X, stretchable elastic members 320AX and 320BX are provided on the thigh belts 302AX and 302BX. The configuration, arrangement position and the like of these expandable members are the same as the configuration of the third embodiment. Therefore, each additional embodiment or modification of the third embodiment can be applied to this X-type modification. The X-shaped modification includes a thigh belt as shown in FIG. 20B shaped so as to incline upward toward the side (the position corresponding to the user's ilium).

[H-shaped modification]
FIG. 21 is a schematic rear view showing a harness according to an H-shaped modification. As shown in FIG. 21, the harness type safety belt 300H includes shoulder belts 301AH and 301BH, thigh belts 302AH and 302BH, back belt 3031H, back belt 3032H, D ring 307H, and upper belt fastener 308H. The chest belts 312AH and 312BH are provided. The harness type safety band 300H has much in common with the X type harness type safety band 300X. For example, the shoulder belt 301AH is a single belt integrally formed with the back belt 3031H and the connection belt 304BH, and similarly, the shoulder belt 301BH is integrally formed with the back belt 3021H and the connection belt 304AH. One belt of

Further, similarly to the X-type harness type safety belt 300X, also in the H-shaped modified example, the left and right (based on the left and right direction of the user) are branched via the upper belt fastener 308H. It is also common in that a connecting belt is provided so as to be bridged between the two back belts. However, unlike the X-type harness type safety belt 300X, the back belt does not cross the shoulder belt because the bifurcation angle of the back belt is small, and the lower belt fastener such as the X type harness type safety belt 300X Not provided. Also in the first to fourth embodiments, the distinction between the connecting belt and the back belt is conceptual, but in the H type harness type safety belt 300H, since the back belt is directly connected to the thigh belt, Connection belts are not defined.

In the H-shaped modified example, the position of the back belt of the harness type safety belt 300H from the buttocks to the thighs of the user (in the position corresponding to the connecting belt of the above other example, an expandable member 340AH that can extend and contract) In the harness type safety belt 300H, the stretchable elastic members 320AH and 320BH are provided on the thigh belts 302AH and 302BH. Therefore, each additional embodiment or modification of the third embodiment can be applied to this H-shaped modification.

In the Y-type harness, it is also possible to adopt a configuration in which the back belt and the shoulder belt are reversed in the front-rear direction.

[Other modifications]
FIG. 22 is a rear view showing an overview of a harness according to another modification. As shown in FIG. 22, the harness type safety belt 300 has shoulder belts 301Aα and 301Bα, thigh belts 302Aα and 302Bα, back belt 303α, connecting belts 304Aα and 304Bα, D ring 307α, and upper belt fasteners. And the chest belts 312Aα and 312Bα. A large difference between the harness type safety belt 300α and the above embodiment is that a part on the lower side of each shoulder belt and a part of the corresponding connection belts are connected. While the connecting belts are integrally formed, they are not integral with but separated from the back belt 303α, and the difference is that they are connected at the lower end side of the back belt. The functions and arrangements of the other parts are the same.

The following features can be mentioned as a harness type safety belt from the above-mentioned embodiment.

[Supplementary Note 1]
A shoulder belt extending through the shoulders of the user and downwardly from the shoulders on the front side of the user;
A thigh belt connected directly or indirectly at one end of the shoulder belt;
A back belt integrally formed with or connected to the shoulder belt and extending downward on the back side of the user;
A harness type safety belt provided with
A harness type safety belt characterized in that the pair of shoulder belts, the pair of thigh belts, or the elastic belt is disposed on the back belt.
[Supplementary Note 2]
The harness type safety belt as set forth in claim 1, characterized in that telescopic expandable members are disposed on each of the back belt and the thigh belt.
[Supplementary Note 3]
A connecting belt connected to the thigh belt from a lower end of the back belt via a lower belt fastener;
The harness type safety belt as set forth in claim 1, characterized in that stretchable elastic members are disposed on each of the connecting belt and the thigh belt.
[Supplementary Note 4]
The harness type safety belt as set forth in claim 3, further comprising an expandable telescopic member provided on the back belt.
[Supplementary Note 5]
The harness type safety band according to any one of appendices 1 to 4, characterized in that the stretchable member includes an elastic belt.
[Supplementary Note 6]
The elastic member passes the elastic belt through the hollow tube, and the hollow tube forms a crease in the length direction, and the width of the elastic belt changes in accordance with the expansion and contraction of the elastic belt to form a bellows shape. The harness type safety band according to any one of appendices 1 to 4, characterized in that:
[Supplementary Note 7]
The telescopic member includes: a bellows portion having a bellows structure which is extended and contracted in the longitudinal direction at the center; and binding portions bound to both ends of the bellows portion;
In the bellows portion, a plurality of elastic yarns are knitted in the length direction of the band with respect to the band including the first layer and the second layer woven with non-stretch yarns.
At the first layer side of the strip, a plurality of first layer sewing points of the elastic yarn are provided in the longitudinal direction of the strip;
At the second layer side of the strip, the second layer sewing portion is provided at a plurality of positions in the length direction of the strip;
The first layer stitching points and the second layer stitching points are alternately arranged in the lengthwise direction of the strip.
The first layer bonding point and the second layer sewing point are obtained by sewing the knitted elastic yarn in the width direction of the strip. Harness type safety belt as described in.
[Supplementary Note 8]
The harness type safety band according to appendix 6 or 7, wherein the bellows portion regulates the maximum extension length of the stretchable member.
[Supplementary Note 9]
When the position of the upper belt fastener on the back belt is at the upper end and the boundary between the connecting belt and the thigh belt is at the lower end, the stretchable member is from the lower end to the distance from the lower end to the upper end. The harness type safety band according to any one of appendices 1 to 8, provided in an area within 53% of the distance.
[Supplementary Note 10]
When the position of the upper belt fastener on the back belt is at the upper end and the boundary between the connecting belt and the thigh belt is at the lower end, the stretchable member is from the lower end to the distance from the lower end to the upper end. The harness type safety band according to any one of appendices 1 to 8, provided in a region of 27% to 53% of the distance.
[Supplementary Note 11]
The harness type safety belt according to any one of appendices 1 to 10, wherein the stretchable member disposed on the connection belt or the back belt is configured to be able to stretch the belt by 10% to 18% in the extension direction of the belt. .
[Supplementary Note 12]
The elastic load disposed on the connection belt or the back belt has a static load of 5 N to 25 N required to extend 45 mm, and a static load required to expand 120 mm of 30 N to 50 N The harness type safety belt according to any of 11.
[Supplementary Note 13]
The elastic members disposed on the connection belt or the back belt have a static load F (N) required to elongate by a length ΔL (mm) in the range of 45 mm to 120 mm according to the following equation (1): The harness type safety belt according to any one of appendices 1 to 12 which satisfies.
[Equation 1]
ΔL / 3-10 ≦ F ≦ ΔL / 3 + 10 formula (1)
[Supplementary Note 14]
The harness type safety belt according to any one of appendices 1 to 13, wherein the stretchable members disposed on the pair of thigh belts are disposed on the buttocks side of the user.
[Supplementary Note 15]
The telescopic member includes an elastic member that can be elastically deformed.
The harness type safety band according to any one of appendices 1 to 14, wherein the elastic member is formed of a plurality of linear members.
[Supplementary Note 16]
The telescopic member includes an elastic member that can be elastically deformed.
The harness type safety band according to any one of appendices 1 to 15, wherein the elastic member comprises seven linear members having an outer diameter of 0.5 mm.

While the preferred embodiment of the harness type safety belt according to the present invention has been illustrated and described above, it will be understood that various modifications can be made without departing from the technical scope of the present invention.

The harness type safety belt according to the present invention reduces the burden of working without giving a feeling of cramping at the time of wearing in order to perform proper wearing on the body, thereby reducing the fall accident by promoting the improvement of the rate of wearing In addition, it can be widely used as a tool that contributes to the drastic reduction of death and injury rates in accidents. Furthermore, it can be diverted not only as a harness type safety zone for a construction site but also as a harness type safety zone for fall prevention as a mountain equipment.

100 200 300 400 500 Harness Type Safety Belt 130 230 430 Stretchable member 220 320 520 520A 520B Stretchable member 340 440 Stretchable member 101A 101B 201A 201B 301A 301B 401A 401B 501A 501B 501A 501B 501A 501B 501B 202A 202B 202B 302A 302B 302B 402B 502A 502B 103 203 303 403 back belt 104A 104B 204A 204B 304A 304B 404A 404B connecting belt 107 207 307 407 507 D ring 108 208 308 408 508 upper belt fastener 109 209 309 409 509 lower belt fastener

Claims (8)

1. A shoulder belt extending through the shoulders of the user and downwardly from the shoulders on the front side of the user;
   A thigh belt connected directly or indirectly at one end of the shoulder belt;
   A back belt integrally formed with or connected to the shoulder belt and extending downward on the back side of the user;
   A harness type safety belt provided with
   A harness type safety belt characterized in that the shoulder belt, the thigh belt, or the back belt is provided with an expandable member.
2. A shoulder belt extending through the shoulders of the user and downwardly from the shoulders on the front side of the user;
   A thigh belt connected directly or indirectly at one end of the shoulder belt;
   A back belt integrally formed with or connected to the shoulder belt and extending downward on the back side of the user;
   A connecting belt formed integrally or connected at the lower end side of the back belt and connected to the thigh belt and extending downward facing at least one of the buttocks and thighs of the user When,
   A harness type safety belt provided with
   A harness type safety belt characterized in that the shoulder belt, the thigh belt, the back belt or the connecting belt is provided with an expandable member.
3. The harness type safety belt according to claim 1 or 2, wherein an elastic member capable of expanding and contracting is provided on each of the back belt and the thigh belt.
4. A connecting belt formed integrally or connected at the lower end side of the back belt and connected to the thigh belt and extending downward facing at least one of the buttocks and thighs of the user Equipped with
   The harness type safety belt according to claim 1, wherein an elastic member is provided on each of the connecting belt and the thigh belt.
5. The connecting belt is connected to the thigh belt from a lower end of the back belt via a lower belt fastener.
   The harness type safety belt according to claim 2, wherein an elastic member is provided on each of the connecting belt and the thigh belt.
6. The harness type safety belt according to claim 4 or 5, wherein the back belt is further provided with an expandable and contractible member.
7. The telescopic member includes: a bellows portion having a bellows structure that expands and contracts in a length direction; and binding portions bound to both ends of the bellows portion;
   The bellows has a band including a first layer and a second layer woven with non-stretch yarns,
   The band includes a plurality of elastic yarns woven along its length,
   At the first layer side of the strip, a plurality of first layer sewing points of the elastic yarn are provided in the longitudinal direction of the strip;
   At the second layer side of the strip, a plurality of second layer sewing points of the elastic yarn are provided in the length direction of the strip;
   The first layer stitching points and the second layer stitching points are alternately arranged in the lengthwise direction of the strip.
   7. The first layer sewing position and the second layer sewing position are those in which the woven elastic yarn is sewn in the width direction of the strip. Harness type safety belt described in.
8. A pair of shoulder belts extending upward from the top of the back of the user, passing through the user's shoulders, and extending downward from the shoulders on the front side of the user;
   A pair of thigh belts attached to one end of the pair of shoulder straps;
   A back belt extending downward corresponding to the center of the back of the user via an upper belt fastener to which the shoulder belts are attached crossingly;
   A pair of connecting belts extending bifurcated from lower ends of the back belts via lower belt fasteners and connected to the pair of thigh belts;
   A harness type safety belt provided with
   A harness type safety belt characterized in that an expandable member is provided on at least one of the pair of shoulder belts, the pair of thigh belts, the back belt, and the connection belt.

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