JP7541308B2 - Harness-type safety belt - Google Patents

Description

The present invention relates to a harness-type safety belt worn by workers for safety when working at height.

For example, when working at heights at construction sites, workers are required to wear harness-type safety belts and safety vests to ensure safety, such as preventing workers from falling. Here, a harness-type safety belt is equipped with at least a shoulder belt that the worker wears around both shoulders and a thigh belt that supports the worker's thighs and passes over both legs. Proposals to attach reflective material to such a harness-type safety belt so that a worker wearing such a harness-type safety belt can be seen from a distance, even at night or in a dark place, have been made, for example, in Patent Documents 1 and 2.

That is, Patent Document 1 proposes sewing a pad with a reflective material onto the belt of a harness-type safety belt.

Patent Document 2 also proposes integrating a reflective vest with reflective material sewn onto it with an existing harness-type safety belt.

Utility Model Registration No. 3175181 JP 2019-180511 A

However, the harness-type safety belts proposed in Patent Documents 1 and 2 have reflective pads sewn onto the belt or vest, which poses the problem that if the reflective pads deteriorate, they cannot be easily replaced with new ones.

One idea to solve this problem is to removably attach reflective pads to the belt of a harness-type safety belt using hook-and-loop fasteners or the like. However, the belt of a harness-type safety belt is equipped with buckles for adjusting the length and cross belts for maintaining a constant width between the left and right shoulder belts, making it difficult to removably attach reflective pads to the belt.

The present invention was made in consideration of the above problems, and its purpose is to provide a harness-type safety belt that can easily and detachably attach reflective pads according to the belt structure, and that can be clearly seen from a distance even when working at night or in a dark place.

One example of the invention for achieving the above object is a harness-type safety belt including at least a shoulder belt that is placed over both shoulders of a worker by passing the front and back of the worker's upper body, and a thigh belt that is connected to the shoulder belt and supports both thighs of the worker,
The first reflective pad is in the form of a band and has a reflective material attached to the surface of a single-layered fabric containing nylon material, or a fabric having at least a two-layered structure containing nylon material and nylon mesh material. The first reflective pad is provided with an attachment band having fasteners including hook-and-loop fasteners arranged at at least two ends in the longitudinal direction of the reflective pad in a direction perpendicular to the longitudinal direction, and the attachment band is wrapped around the shoulder belt and the attachment bands are joined together with the fasteners, thereby removably attaching the reflective material pad to the front side of the shoulder belt.

The invention of claim 1 is characterized in that a strip-shaped second reflective pad having a three-layer structure formed by sandwiching cushioning material between two layers including nylon material and nylon mesh material and a fabric whose left and right width is approximately three times the width of the shoulder belt and has a reflective material attached to the surface thereof is folded in thirds and wrapped around the shoulder belt, and the opposing surfaces of the fabric folded in thirds around the shoulder belt are joined together with a fastener including a hook-and-loop fastener provided on the opposing surfaces, thereby allowing the second reflective pad to be detachably attached to the back side of the shoulder belt.

The invention according to claim 2 is characterized in that, when the fastener is a hook-and-loop fastener, the width of the hook-and-loop fastener is set to be substantially equal to the width of the shoulder belt.
In the invention as set forth in claim 1 , both longitudinal edges of the second reflective pad on both sides in the width direction on which the hook-and-loop fastener is provided are inclined outward in the width direction.

The invention of claim 3 is the invention of claim 1 or 2 , characterized in that the corners of the second reflective pad on both sides in the width direction where the hook-and-loop fastener is provided are rounded in an arc shape.

In the present invention, the fasteners can be selected from hook-and-loop fasteners, buttons, hooks, hook ties, etc. The fabric can be made of any of the following: woven, knitted, nonwoven, or molded sheet materials made of chemical or natural fibers, and the mesh material can be made of any of the above-mentioned woven, knitted, or nonwoven materials.

According to the first embodiment of the invention, the first reflective pad is stretched across the buckle or cross belt of the shoulder belt of the harness type safety belt, and the bands provided at least at two longitudinal ends of the first reflective pad are wrapped around the shoulder belt, and the ends are joined together with a hook-and-loop fastener, so that the first reflective pad can be detachably attached at any position in the height direction of the front part of the shoulder belt. When light from a light source is irradiated onto the harness type safety belt to which the first reflective pad is attached, the light is reflected by the reflective material of the first reflective pad, and the reflective material emits light, so that the presence of a worker wearing the harness type safety belt can be clearly seen from a distance even at night or in a dark place, and high safety is ensured for the worker. In addition, if the first reflective pad is damaged or deteriorated, it can be easily replaced with a new one.

According to the invention of claim 1 , the second reflective pad can be easily and reliably attached to the back of the shoulder belt of the harness-type safety belt, where there is no buckle or cross belt, by wrapping the second reflective pad in three so as to encase the shoulder belt and joining the opposing faces of the wrapped pad with a hook-and-loop fastener. And, if the second reflective pad is damaged or deteriorated, it can be easily replaced with a new one.

According to the invention of claim 2 , the width of each hook-and-loop fastener provided on the second reflective pad is set to be approximately equal to the width of the shoulder belt, so that even if the shoulder belt has a different width dimension, the second reflective pad can be folded in three and wrapped around the back of the shoulder belt and reliably attached to the back of the shoulder belt using the hook-and-loop fasteners.

According to the invention of claim 1 , the longitudinal edges of both widthwise sides of the second reflective pad on which the hook-and-loop fastener is provided are inclined toward the outside in the widthwise direction, so that the length of both longitudinal edges (hypotenuses) of both widthwise ends of the second reflective pad is increased, and when removing the second reflective pad from the shoulder belt, the second reflective pad can be easily removed from the shoulder belt by inserting a hand through the longer part (hypotenuse).

According to the invention of claim 3 , the corners on both sides of the width of the second reflective pad where the hook-and-loop fastener is provided are rounded into an arc shape, so that these corners do not roll up, and the problem of the second reflective pad easily coming off during use is prevented.

FIG. 2 is a front view showing the harness-type safety belt in a worn state. FIG. 2 is a rear view showing the harness-type safety belt in a worn state. FIG. 2 is a front perspective view of a first reflective pad before attachment. 4 is a cross-sectional view taken along line AA in FIG. 3. FIG. 2 is a perspective view of the rear surface side of the first reflective pad before attachment. FIG. 13 is a perspective view showing a state in which a first reflective pad is attached to the front surface of a shoulder belt. 7 is a cross-sectional view taken along line BB in FIG. 6. 1 is a front view showing a state in which a harness-type safety belt according to the present invention is worn. FIG. 2 is a rear view showing the harness-type safety belt according to the present invention in a worn state. FIG. 2 is a perspective view of a second reflective pad before attachment. 11 is a cross-sectional view taken along line CC of FIG. 10. FIG. 11 is a front view showing the second reflective pad attached to the back surface of the shoulder belt. This is a cross-sectional view taken along line D-D in Figure 12.

The following describes an embodiment of the present invention with reference to the attached drawings.

First, the structure and wearing instructions for a harness-type safety belt without reflective pads will be explained below with reference to Figures 1 and 2.

Figure 1 is a front view of an example of a harness-type safety belt when worn, and Figure 2 is a rear view of the same. The illustrated harness-type safety belt 1' includes a pair of left and right shoulder belts 2 that the worker wears over both shoulders, and a pair of circular left and right thigh belts 3 that support the worker's thighs through which both feet are passed. Although not shown in the figure, the pair of left and right shoulder belts 2 cross at a cross metal fitting 6 on the rear side and are connected to the pair of left and right thigh belts 3. The cross metal fitting 6 is fitted with a ring-shaped hanging metal fitting 7 for hanging a hook attached to the end of a lifeline (not shown). Some harness-type safety belts do not have a hanging metal fitting 7, but the present invention can be applied to them.

As shown in FIG. 1, cross belts 4 are provided at the locations of the left and right shoulder belts 2 that correspond to the chest area of the worker to keep the width of the left and right shoulder belts 2 constant and prevent the shoulder belts 2 from coming off, and buckles 5 are provided near the connection points of the cross belts 4 of the left and right shoulder belts 2.

The harness-type safety belt 1 according to the present invention shown in FIG. 8 has a first reflective pad 10 attached across the cross belt 4 and buckle 5 located on the front side of the left and right shoulder belts 2. The structure and attachment method of the first reflective pad 10 will be explained below with reference to FIGS. 3 to 7.

Figure 3 is a front perspective view of the first reflective pad before attachment, Figure 4 is a cross-sectional view along line A-A in Figure 3, Figure 5 is a rear perspective view of the first reflective pad before attachment, Figure 6 is a front perspective view showing the first reflective pad attached to the shoulder belt, and Figure 7 is a cross-sectional view along line B-B in Figure 6.

The first reflection pad 10 is configured by attaching a vertically elongated reflective material 12 to the surface of a vertically elongated strip-shaped fabric 11, and attaching strip-shaped bands 13 to three locations on the fabric 11, namely the upper end, the lower end, and the middle end. Here, as shown in FIG. 4 as an example, the fabric 11 has a two-layer structure of a nylon material 11a that is resistant to friction, lightweight, and highly elastic, and a nylon mesh material 11b that is highly breathable, and the reflective material 12 is attached to the surface of the nylon material 11a on the front side by sewing its periphery. The reflective material 12 has a retroreflection property that emits light by reflecting light emitted from a light source. In this embodiment, the fabric 11 of the first reflection pad 10 has a two-layer structure of a nylon material 11a and a nylon mesh material 11b, but may have a single-layer structure of nylon material or a multi-layer structure of three or more layers.
In the above example, the fabric 11 is made of nylon material 11a and nylon mesh material 11b, but the fabric 11 that can be used in the present invention may be made of any one of chemical fibers including the nylon material 11a and nylon mesh material 11b, or natural fiber woven materials, knitted materials, nonwoven fabric materials, molded sheet materials, or mixtures of these materials.

The three bands 13 are arranged at the top, bottom and middle of the back surface of the fabric 11 along the left-right direction perpendicular to the longitudinal direction (up-down direction) of the fabric 11, and are attached to the back surface of the fabric 11 by sewing the center of the left-right direction. Before the first reflective pad 10 is attached to the shoulder belt 2, a rectangular hook-and-loop fastener 14 is attached to the back surface of the left end 13L of each band 13 extending to the left of the fabric 11. A rectangular hook-and-loop fastener 15 is attached to the surface of each right end 13R of each band 13 extending to the right of the fabric 11. In this embodiment, the bands 13 are attached to a total of three places, the top, bottom and middle ends of the fabric 11, but the number of bands 13 is arbitrary, as long as the bands 13 are attached to at least two places at the top and bottom ends of the fabric 11. In addition to the hook-and-loop fastener 14, buttons, hooks, hooks, binding strings, etc. can be selected as the fastener of the present invention. This also applies to the hook-and-loop fastener alternatives described below.

The first reflective pad 10 constructed as described above is attached to the front of the left and right shoulder belts 2, straddling the cross belt 4 and buckle 5 (see FIG. 1), as shown in FIG. 8, in the following manner.

That is, the first reflective pad 10 is placed on the front side of the left and right shoulder belts 2 so as to straddle the cross belt 4 and the buckle 5 with the surface to which the reflective material 12 is attached facing the front side, and the left end 13L and the right end 13R of each band 13 are turned to the back side of the shoulder belt 2 so as to wrap around the shoulder belt 2, and are joined to each other by the hook-and-loop fasteners 14, 15 provided on both ends, so that the first reflective pad 10 is detachably attached to the left and right shoulder belts 2, as shown in Figs. 6 and 8. Here, as shown in Fig. 7, the right end 13R of each band 13 is folded so as to wrap around the shoulder belt 2, and then the left end 13L is folded, and the hook-and-loop fastener 14 provided on the left end 13L is placed on the hook-and-loop fastener 15 provided on the right end 13R, and the double-sided fasteners 14, 15 are joined to each other.

As shown in Figures 8 and 9, second reflective pads 20 are attached to four locations on each of the left and right shoulder belts 2: the portion that is placed on the worker's shoulder and the portion that corresponds to the worker's back. The structure and attachment method of the second reflective pads 20 will be explained below with reference to Figures 10 to 13.

Figure 10 is a perspective view of the back side of the second reflective pad before attachment, Figure 11 is a cross-sectional view taken along line C-C in Figure 10, Figure 12 is a front view showing the second reflective pad attached to the shoulder belt, and Figure 13 is a cross-sectional view taken along line D-D in Figure 12.

The second reflective pad 20 is constructed by attaching a vertically elongated reflective material 22 to the surface of the vertically elongated strip-shaped portion of fabric 21, which has a width approximately three times that of the shoulder belt 2, when the fabric 21 is folded in thirds. Here, as shown in FIG. 11, the fabric 21 has a three-layer structure in which highly shock-absorbing cushioning material 21c is sandwiched between nylon material 21a and nylon mesh material 21b. In this way, by making the fabric 21 of the second reflective pad 20 a three-layer structure including highly shock-absorbing cushioning material 21c, the burden on the shoulders and back of a worker wearing a harness-type safety belt 1 to which the second reflective pad 20 is attached is reduced.

As shown in Fig. 10, the fabric 21 has a central portion 21M located in the widthwise center of the fabric 21 to be folded in thirds, and a left end portion 21L and a right end portion 21R extending left and right from the central portion 21M to form both sides in the widthwise direction. A strip-shaped reflective material 22 elongated in the vertical direction is attached to the front surface (back surface in Fig. 10) of the right end portion 21R by sewing it around the periphery, as shown in Fig. 12. The reflective material 22 has reflectivity similar to the reflective material 12 used in the first reflective pad 10.

As shown in Fig. 10, a strip-shaped hook-and-loop fastener 24 is attached in the vertical direction to the outer surface of the left end 21L of the fabric 21 that is folded in thirds, and a strip-shaped hook-and-loop fastener 15 is similarly attached in the vertical direction to the inner surface of the right end 21R. Here, the width W1 of these hook-and-loop fasteners 24, 25 is set to be approximately equal to or slightly smaller than the width W2 of the shoulder belt 2 (W1 ≒ W2).

The second reflective pad 20 configured as described above is then attached to the back or shoulder of the left and right shoulder belts 2 in the following manner.

That is, the second reflective pad 20 is passed through the back side of the shoulder belt 2 in a flat spread state (a state in which the left end 21L and the right end 21R at both ends of the width direction of the fabric 21 are spread). At this time, the center part 21M of the fabric 21 of the second reflective pad 20 is placed on the back side of the left and right shoulder belts 2. Then, from this state, the left end 21L and the right end 21R of the fabric 21 of the second reflective pad 20 are folded in the direction shown by the arrow in FIG. 10 (inward) and these are stacked up and down on the front of the shoulder belt 2, and the two are joined to each other by the hook-and-loop fasteners 24, 25 provided on them, so that the reflective pad 20 is attached to the shoulder belt 2. More specifically, as shown in FIG. 13, first, the left end 21L of the fabric 21 is folded, and then the right end 21R is folded and stacked on the left end 21L. Then, the hook-and-loop fastener 25 attached to the inner surface of the right end 21R overlaps the hook-and-loop fastener 24 attached to the outer surface of the left end 21L and the two are joined together, so that the second reflective pad 20 is removably attached while wrapped around the shoulder belt 2. When the second reflective pad 20 is attached to the back surface or shoulder of the shoulder belt 2 in this way, the reflective material 21 attached to the second reflective pad 20 faces the front side (the side that comes into contact with people's eyes) as shown in Figures 8, 9, and 12.

In this embodiment, as shown in Fig. 12, the left end 21L and the right end 21R, which are the widthwise ends of the fabric 21 folded in three of the second reflective pad 20 to which the hook-and-loop fasteners 24, 25 are attached, are inclined outward in the widthwise direction on both the top and bottom sides. Specifically, the upper edges of the left end 21L and the right end 21R are oblique sides 21L1, 21R1 that are inclined downward along the widthwise direction by an angle α, and the lower edges of the left end 21L and the right end 21R are oblique sides 21L2, 21R2 that are inclined upward along the widthwise direction by an angle α.

As shown in Figures 10 and 12, the upper and lower corners (corners) of the left end 21L and right end 21R, which are both ends in the width direction of the fabric 21 of the second reflective pad 20, are rounded into an arc shape (a shape with an R).

As shown in Figures 8 and 9, a worker wearing a harness-type safety belt 1 with a first reflective pad 10 and a second reflective pad 20 attached to each part of the shoulder belt 2 performs work at a height with a hook (not shown) attached to the end of a lifeline (not shown) hooked to a hanging metal fitting 7 (see Figure 9) attached to a cross metal fitting 6 on the back side of the shoulder belt 2. At this time, if the worker should slip from the scaffolding, the worker is suspended by the lifeline to prevent him or her from falling to the ground, ensuring the worker's safety.

In addition, when a worker is working at a height at night or in a dark place, when light from a light source is irradiated onto the reflective material 12 of the first reflective pad 10 or the reflective material 22 of the second reflective pad 20, the light is reflected by the reflective materials 12, 22, causing them to emit light. This allows the worker to be clearly seen even from a distance, ensuring the safety of the worker.

As described above, according to this embodiment, the first reflective pad 10 is stretched across the cross belt 4 and buckle 5 provided on the shoulder belt 2 of the harness-type safety belt 1, the bands 13 provided at three positions in the vertical direction of the first reflective pad 10 are wrapped around the shoulder belt 2, and the ends are joined with hook-and-loop fasteners 14 and 15, so that the first reflective pad 10 can be detachably attached to a part of the shoulder belt 2. When light from a light source is irradiated onto the harness-type safety belt 1 to which the first reflective pad 10 is attached, the light is reflected by the reflective material 12 of the first reflective pad 10, and the reflective material 12 emits light, so that the presence of a worker wearing the harness-type safety belt 1 can be clearly seen from a distance even at night or in a dark place, ensuring high safety for the worker. In addition, since the first reflective pad 10 is detachably attached to the shoulder belt 2, if the first reflective pad 10 is damaged or deteriorated, it can be easily replaced with a new one.

Furthermore, according to this embodiment, the second reflective pad 20 can be easily and securely attached to the shoulder belt 2 of the harness-type safety belt 1 by wrapping the second reflective pad 2 around the shoulder belt 2 and joining the ends with hook-and-loop fastener bars 24, 25, for the shoulder and back parts of the shoulder belt 2 where there is no cross belt 4 or buckle 5. And, because the second reflective pad 20 is detachably attached to the shoulder belt 2, if the second reflective pad 20 becomes damaged or deteriorated, it can be easily replaced with a new one.

In addition, according to this embodiment, the width W1 of each hook-and-loop fastener 24, 25 provided on one outer surface and the other inner surface of both widthwise sides 21L, 21R of the second reflective pad 20 that are wrapped around and overlapped on the shoulder belt 2 is set to be approximately equal to the width W2 of the shoulder belt 2, so that the second reflective pad 20 can be wrapped around shoulder belts 2 of different widths and reliably attached in a detachable manner using the hook-and-loop fasteners 24, 25.

In this embodiment, the upper and lower edges of both widthwise ends 21L, 21R of the second reflective pad 20 on which the hook-and-loop fasteners 24, 25 are provided are inclined by an angle α toward the outside in the widthwise direction. This increases the length of the upper and lower edges (oblique sides) 21L1, 21L2 and 21R1, 21R2 of both widthwise sides 21L, 21R of the second reflective pad 20, and when removing the second reflective pad 20 from the shoulder belt 2, the second reflective pad 20 can be easily removed by inserting a hand through the longer oblique sides 21R1, 21R2.

In addition, in this embodiment, the corners of the left end 21L and right end 21R, which are both sides of the width of the second reflective pad 20 where the hook-and-loop fasteners 24, 25 are provided, are rounded into an arc shape, so that these corners do not roll up, preventing the second reflective pad 20 from easily coming off during use.

The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings.

REFERENCE SIGNS LIST 1 Harness-type safety belt 2 Shoulder belt 3 Thigh belt 4 Cross belt 5 Buckle 10 First reflective pad 11 Fabric of first reflective pad 11a Nylon material 11b Nylon mesh material 12 Reflective material of first reflective pad 13 Band 13L Left end of band 13R Right end of band 14, 15 Hook-and-loop fastener of first reflective pad 20 Second reflective pad 21 Fabric of second reflective pad 21L Left end of second reflective pad 21R Right end of second reflective pad 21a Nylon material 21b Nylon mesh material 21c Cushion material 22 Reflective material of second reflective pad 24, 25 Hook-and-loop fastener of second reflective pad W1 Width of hook-and-loop fastener W2 Width of shoulder belt α Angle of inclination of both widthwise edges of second reflective pad

Claims (5)

A harness-type safety belt including at least a shoulder belt that is hung on both shoulders of a worker by passing the front and back of the upper body, and a thigh belt that is connected to the shoulder belt and supports both thighs of the worker,
A belt-shaped reflective pad is formed by attaching a reflective material to the surface of a two-layered fabric containing nylon material and nylon mesh material, or a three-layered fabric formed by sandwiching a cushioning material between the two layers and forming the fabric with a left-right width approximately three times the width of the shoulder belt, and the reflective pad has both longitudinal ends on both sides in the width direction where fasteners including hook-and -loop fasteners are provided, and is detachably attached to the back side of the shoulder belt by folding the fabric in thirds and wrapping it around the shoulder belt, and joining the opposing surfaces of the fabric folded in thirds around the shoulder belt with the fasteners including hook-and-loop fasteners provided on the opposing surfaces. The harness-type safety belt according to claim 1, in which, if the fastener is a hook-and-loop fastener, its width is set to be approximately equal to the width of the shoulder belt. The harness-type safety belt according to claim 1 or 2, wherein the corners of the reflective pad on both sides in the width direction where the hook-and-loop fastener is provided are rounded in an arc shape. The harness-type safety belt according to claim 1 or 2, wherein the fastener is selected from the group consisting of a hook-and-loop fastener, a button, a hook, a hook fastener, and a binding cord. A harness-type safety belt according to any one of claims 1 to 4, wherein the fabric is made of any one of chemical or natural fiber woven materials, knitted materials, nonwoven fabric materials, and molded sheet materials, and the mesh material is made of any one of the woven materials, knitted materials, and nonwoven fabric materials.

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