JP6430750B2 - Safety belt with a pad for improved ventilation - Google Patents

Description

  The present invention relates to a safety belt mainly used in high-altitude work, and more particularly to a safety belt provided with a pad for reducing a burden on a human body when the safety belt is attached.

In order to prevent a worker from falling in the work site at a high place, the worker wears a safety belt composed of a belt part and a lanyard (rope or strap + hook or carabiner). Yes. According to the Ministry of Health, Labor and Welfare Notification Law “Safety Belt Standards”, safety belts are classified into a belt-type safety belt and a harness-type safety belt when classified by structure. It is described that there is a safety belt for fishing.
"U-shaped fishing" means "a state where one end of a safety band lanyard connected to a square ring via a telescopic regulator is turned to a structure, etc., and then a hook is put on the D ring to hold the body stably." In this case, the lanyard is placed in a U-shaped state on the pillar so that the operator can keep his / her body weight in a stable state.
“Single-lifting” means “Hook (carabiner) at the tip of the lanyard of the safety belt is directly attached to the structure, etc., or the lanyard is turned around the structure and the hook is attached to the 8-shaped ring or the third ring. Or it is attached to the lanyard ".

  The safety belt for the U-shaped belt in the torso belt type safety belt is “to strengthen the torso belt to prevent kinking and creases, and to reduce the impact force when preventing a fall or the load when supporting the body weight as wide as possible. In order to handle it with a belt belt, an “auxiliary belt” which is a reinforcing band-shaped component attached to the body belt is provided. An example is shown in FIG. When an operator wears a U-shaped torso belt-type safety belt and puts his weight in the safety belt while hanging in a U-shape, the load on the lower back is painful or fatigued. To reduce the burden on the lumbar region by softening the waist contact and receiving the weight of tools and the like over a wide area.

  The waist belt type safety belt includes a waist bag and a pliers case, and is equipped with tools such as a pliers and a monkey wrench, and small equipment such as bolts and nuts necessary for construction. Has been. An example is shown in FIG. At this time, if the weight of the tool or small equipment becomes heavy, the burden on the operator's waist increases, so attach the waist belt pad to the waist belt to improve cushioning and soften the waist, and tools etc. The burden on the lower back is reduced by receiving the weight of a large area.

In the harness-type safety belt, as in the case of the single belt safety belt in the [0004] trunk-belt safety belt, the body-belt is often connected and integrated with the harness-type safety belt. At this time, the body belt pad is often attached to the body belt. An example is shown in FIG.
In addition, the weight of the pliers, monkey wrench, small equipment, etc. attached to the body belt is applied to both shoulders of the operator via the shoulder belt of the harness-type safety belt, which is a burden. In order to reduce this burden, the shoulder strap of the harness-type safety belt is attached with a pad to soften the contact with the shoulder and receive the weight over a wide area, thereby reducing the burden on the shoulder.

  When an operator wears a harness-type safety belt, if the safety belt is dropped and the fall is prevented by the safety belt, a large drop impact load is applied from the thigh belt of the harness-type safety belt to the operator's thigh. Will be added. Also, until rescued, the worker must stand in a suspended state and withstand pains such as crotch injury and limb numbness. In order to reduce this burden, pads may be attached to the belts on both thighs of the harness-type safety belt. An example of a state in which the crash is prevented is shown in FIG.

  In the pads described in [0003] to [0006], a cushion layer such as a thick plate-like foamed urethane foam is generally covered with a synthetic resin sheet from both sides, and an anti-wear cloth or the like is sewn on the outer periphery to secure a safety belt. Several belts are provided for attachment to the belt. However, when an operator wears a safety belt provided with a pad, the pad is in close contact with the body, so that the intimate part sweats and is easily stuffy. Especially in the summer, the amount of sweat increases and the stuffiness is intense, which is very unpleasant. Therefore, a safety belt having a cushioning property similar to that of a conventional pad and having a good air permeability is desired.

  Furthermore, in particular, in summer, odor is generated by perspiration and the odor is unpleasant. Washing with an electric washing machine can remove most of the dirt and odors, but the safety belt comes with metal parts, so the metal parts collide with the washing machine's washing basket. This may damage the electric washing machine. Further, since the belts in the safety belt come into strong contact with each other and rub against each other due to a strong water flow during washing, a reduction in belt strength is observed. In the safety zone, strength is paramount, and washing that causes reduced strength should not be performed frequently.

  The pad surface is wiped with a cloth soaked in water or a neutral detergent in order to remove the dirt and bad odor, but it is difficult to completely remove the pad surface. Even after soaking or washing your hands, you cannot remove them completely. Moreover, since it takes time until it dries with the type which covered cushion layers, such as a urethane foam, from both surfaces with the sheet | seat made from a synthetic resin, it cannot carry out frequently. Therefore, there is a demand for a safety belt that has a breathable, good sweat, easily removes odors and dirt by soaking and washing hands, and has a pad that is easy to dry.

  A conventional cushion layer is made of a plastic foam such as foamed urethane foam, and has a large number of bubbles. In the case of an open-cell structure in which the bubbles are partly connected in the form of a window, in order to vent the cushion layer from the back to the surface, a number of bubbles can continue from one window to the next. It is not arranged as a space for the amount of ventilation sufficient to cool the body, that is, as a passage gap, and has cushioning properties but poor ventilation performance. In addition, the conventional cushion layer easily permeates and settles air bubbles and windows, and it cannot be said that the detergent, moisture and air required to remove it are sufficient, and dirt and bad odors can be easily removed. Absent. Also, it takes time to dry and washing cannot be performed frequently.

  When a conventional cushion layer requires a hard cushioning property, it has a closed cell type structure in which each bubble is individually sealed. In this case, since there is no ventilation gap connected from the back surface to the surface of the cushion layer, ventilation is not possible. In summer, sweating, stuffiness, and discomfort.

As a technique for improving the air permeability of such a safety belt pad, there is an “auxiliary belt” disclosed in Patent Document 1. According to the present invention, a ventilation groove opened at the upper and lower edges of the cushion layer is formed on the inner surface of the cushion layer constituting the auxiliary belt by a suture line or the like so as to ensure air permeability at the time of wearing.
However, this ventilation groove is often blocked by the worker's work clothes, and a ventilation gap sufficient to suppress perspiration cannot be obtained. The parts other than the ventilation groove are in close contact with the human body, so sweat and sweat at that part. In addition, the ventilation performance is inferior because it does not vent from the back of the auxiliary belt to the surface, and it is difficult to dry because it is difficult to dry.

  Further, as a technique for improving the cushioning property of the waist belt pad, a “belt with a waist pad” disclosed in Patent Document 2 and a “buffer on a pillar safety belt trunk rest belt” disclosed in Patent Document 3 are disclosed. There is a body. The device of Patent Document 2 is configured to form a shock absorber by communicating a plurality of air-filled portions, and the device of Patent Document 3 is configured by a plastic foam such as foamed urethane foam. Then, a heat welding line is inserted so as to follow the taper of the waist of the human body. However, plastic foam and air filling do not allow ventilation, so it is uncomfortable when worn in the summer and cannot be easily washed.

In addition, as a technology to improve the breathability of the body belt pad, the cushion layer is made of a plastic foam such as foamed urethane foam, and a plurality of holes penetrating in the front and back direction of the cushion layer are formed for the purpose of ventilation. Can be considered. An example is shown in FIGS.
If the worker is not wearing the pad, there is a ventilation gap penetrating the front and back of the cushion layer, so it can vent in the front and back direction through the hole, but when the pad is attached to the human body, the back of the pad is the human body The surface of the hole is closed and the surface of the hole is blocked, and the air in the hole is stagnated and does not vent, so it is difficult to obtain the expected effect of suppressing sweating. Moreover, surfaces other than the hole of a cushion layer adhere | attach on a human body like the conventional pad, and it sweats and gets steamed.

Japanese Patent Laid-Open No. 2000-14815 No. 7-53636 Registered Utility Model Publication No. 3004231

The main problem to be solved by the present invention is that the portion of the pad attached to the safety belt that sweats for the purpose of reducing the burden on the human body sweats and becomes uncomfortable and becomes uncomfortable. The method of providing ventilation grooves to ensure ventilation when worn is that the contact part with the human body is stuffy, so the ventilation performance is inferior, and it is difficult to wash because it is difficult to dry. The method of only improving the cushioning property of the torso belt pad is uncomfortable when worn in summer or the like because it does not ventilate, and furthermore, it cannot be easily washed.
Therefore, the present invention has an object to provide a safety belt provided with a safety belt ventilation pad that can be used in a clean and easy-to-clean state where the contact portion with the human body is less likely to be stuffy when worn with improved breathability. It is said.

  In order to achieve the above object, the present invention includes a cushion layer having a space for venting in the front and back direction and a space for venting in the lateral direction inside the cushion layer to a pad attached to the belt of the safety belt. The configuration.

  A cushion layer formed of a three-dimensional network structure in which continuous filaments of a plurality of thermoplastic resins are intertwined randomly and partially welded, and have a substantially flat plate shape with a ventilation gap in the front and back direction and the lateral direction. It is set as the structure provided.

  While ensuring sufficient cushioning as a safety band pad due to the bending rigidity of the three-dimensional network structure, a cushion layer with a large porosity is formed because it is an aggregate of fibers, and in the front and back direction of the cushion layer and inside the cushion layer It is set as the structure which has the ventilation gap for ventilating in the horizontal direction.

  The cushion layer is composed of a ventilation pad formed by sandwiching the front and back surfaces of the cushion layer with a mesh-shaped woven fabric having air permeability.

  In order to attach to the safety belt, the ventilation pad is provided with a belt threader having a structure for inserting a belt constituting the safety belt.

  The vent pad may be stitched with a belt constituting a safety band to constitute a safety band with a vent pad.

  By using the safety belt provided with the ventilation pad of the present invention, the ventilation performance of the pad is greatly improved, so that the wearing feeling can be improved because sweating is suppressed and it is difficult to get stuffy. Can suppress dirt and odor caused by sweat. In addition, while maintaining the cushioning property equivalent to that using the conventional technology, it is lighter than the conventional technology, so that the mounting property can be improved. Furthermore, it is possible to easily remove bad odors and dirt by soaking and washing, and it is always possible to use in a clean state.

It is explanatory drawing of the trunk belt type safety belt for U character suspension equipped with the ventilation pad which concerns on embodiment of this invention. It is explanatory drawing of the trunk | drum belt type safety belt for one suspension with which the ventilation pad which concerns on embodiment of this invention was mounted | worn. It is explanatory drawing of the harness type safety belt which equipped with the ventilation pad which concerns on embodiment of this invention. It is explanatory drawing which showed an example of the state which the operator who wore the harness type safety belt prevented fall. It is the front view which showed the ventilation pad which concerns on embodiment of this invention. It is the bottom view which showed the ventilation pad which concerns on embodiment of this invention. It is the side view which showed the ventilation pad which concerns on embodiment of this invention. FIG. 8 is a cutaway view of the ventilation pad according to the embodiment of the present invention along the line AA in FIG. 7. FIG. 6 is a cutaway view of the ventilation pad according to the embodiment of the present invention along the line BB in FIG. 5. FIG. 8 is a sectional view taken along the line AA in FIG. 7 of a conventional pad in consideration of air permeability. FIG. 6 is a sectional view taken along the line BB in FIG. 5 of a conventional pad in consideration of air permeability. It is the front view which showed the conventional standard pad. FIG. 13 is a cross-sectional view of a conventional standard pad taken along line CC in FIG. 12.

  Embodiments according to the present invention will be described below with reference to the drawings.

The ventilation pad 1 includes a cushion layer 2 and a breathable woven fabric 3 arranged so as to sandwich the front and back surfaces of the cushion layer 2, and a border tape 5 for polymerizing the cushion layer 2 and the woven fabric 3 to sandwich the outer periphery thereof. A sewing thread 6 for sewing the cushion layer 2, the woven fabric 3, and the edging tape 5 is provided.
On the surface of the ventilation pad 1, a plurality of belt threaders 4 having a structure for inserting a belt constituting a safety belt are provided by sewing with a sewing thread. The belt threading tool 4 includes a hook-and-loop fastener recess 4a and a hook-and-loop fastener protrusion 4b. After the safety belt is placed in close contact with the surface of the ventilation pad 1, the belt looper 4 is stacked on the safety belt. By attaching the hook-and-loop fastener recess 4a and the hook-and-loop fastener protrusion 4b, the ventilation pad 1 can be attached to and detached from the safety belt. Further, in the belt threading tool 4, a hook may be used instead of the hook-and-loop fastener.

  The ventilation pad may not be provided with a belt threader having a structure for inserting a belt constituting the safety belt, and the ventilation pad may be separable from the safety belt by sewing.

  The cushion layer 2 in the embodiment shown in FIG. 9 has a plurality of continuous strands of thermoplastic resin that are three-dimensionally randomly entangled and partially welded, has a substantially flat plate shape with front and back surfaces, and a ventilation gap in the front and back direction. It is formed of a three-dimensional network structure having The three-dimensional network structure has an appropriate cushioning property by adjusting the thickness and bending rigidity caused by the plastic material, and the cushioning property makes the waist contact soft. The amount of plastic fiber sufficient to ensure the necessary cushioning properties does not require the cushion layer 2 to be disposed at a density that does not allow ventilation.

  In the cushion layer 2, the component that shields ventilation is only plastic fibers, and has a wide space 21 between the fibers as a ventilation gap. Accordingly, the cushion layer 2 can be ventilated from the surface of the cushion layer 2 through the space 21 inside the cushion layer 2 and through the vicinity of the sweating portion of the human body.

This means that there is a wide space for moisture to pass between the front and back surfaces of the cushion layer 2. Accordingly, the detergent at the time of washing can enter the details of the cushion layer 2 and remove dirt. In addition, it drains quickly and dries quickly. In washing, both dirt removal and dehydration are easier than conventional pads, and by increasing the number of washings, dirt and odors can be suppressed and kept clean.
According to the experiment, even in a light wind of about 1 m / sec of the fan, the air permeability is sufficient to feel air flow from the back surface of the cushion layer 2 to the surface. Since the breathability is good, the amount of sweating when worn can also be suppressed.

  The cushion layer 2 has a three-dimensional network structure in which continuous filaments of a plurality of thermoplastic resins are randomly entangled three-dimensionally and are partially welded, is substantially flat, has front and back surfaces, and has ventilation gaps in the front and back directions. Since it is formed of a body, the ratio of the space excluding plastic fibers in the entire space of the cushion layer 2 is large, and as a result, the density is higher than that of a plastic foam such as urethane foam as in the conventional product. It becomes light because it becomes lower.

  The front and back surfaces of the cushion layer 2 are sandwiched between mesh-shaped breathable woven fabrics 3 and the outer peripheries of the cushion layer 2 and the breathable woven fabric 3 are sewn with a border tape, and a belt constituting a safety belt is inserted. The ventilation pad 1 provided with the belt threading tool 4 having the structure as described above is formed, and the ventilation pad 1 is attached to the safety belt. Further, the belt threading tool 4 may be omitted from the ventilation pad 1, and the belt constituting the safety belt and the ventilation pad 1 may be stitched together.

  FIG. 1 shows a first embodiment of the present invention. The ventilation pad 1 is attached to the waist belt 70 which is a component of the safety belt for U-shaped suspension in the waist belt type safety belt.

  FIG. 2 shows a second embodiment of the present invention. The ventilation pad 1 is attached to the body belt 70 which is a component part of the safety belt for single fishing in the body belt type safety belt.

  FIG. 3 shows a third embodiment of the present invention. The ventilation pad 1 is attached to a belt 71 that is a component of a harness-type safety belt. The ventilation pad 1 is attached at the position of the waist, both shoulders, and both thighs of the human body in a harness-type safety belt in a state where all or one place or a plurality of places are combined.

1 Ventilation pad 1a Ventilation pad For U-shaped suspension 1b Ventilation pad Lumbar for single suspension 1c Ventilation pad Back For harness-type safety belt 1d Ventilation pad Thigh Harness-type safety belt 2 Cushion layer 2a Considering conventional breathability Pad cushion layer 2b Conventional standard pad cushion layer 21 Vent gap in cushion layer 21a Vent gap in pad cushion layer 21b considering conventional breathability 21b Conventional standard pad cushion layer Bubbles in the belt 3 Breathable woven fabric 4 Belt threading device 4a Hook and loop fastener recess of the belt threading device 4b Hook and loop fastener projection of the belt threading device 5 Edge tape 6 Sewing thread 70 Belt for belt belt safety belt 71 Harness type safety belt Belt 80 waist bag 81 pliers

Claims (4)

Cushioning and air flow are determined by the rigidity of the solid network structure that has a continuous plate of multiple thermoplastic resins that are randomly entangled three-dimensionally and partially welded. characterized by being arranged breather pad having a cushioning layer having a gender, safety belts provided with a pad having improved breathability. The safety belt with a pad with improved air permeability according to claim 1, wherein the cushion layer is provided on an auxiliary belt of a safety belt for U-shaped suspension in a waist belt type safety belt. 2. The safety belt provided with the pad having improved air permeability according to claim 1, wherein the pad having the cushion layer is attached to a single belt safety belt in the waist belt type safety belt. 3. The pad having the cushion layer is mounted in a harness-type safety belt in a state where all or one or a plurality of places are combined at the positions of the waist, both shoulders, and both thighs of the human body. A safety belt comprising a pad with improved air permeability according to claim 1.

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