JP7201207B2 - Protective material and protective footwear using it - Google Patents

Description

TECHNICAL FIELD The present invention relates to a protective material and protective footwear using the protective material for preventing a worker from being accidentally damaged by a chainsaw used in logging work.

Conventionally, many protective materials have been disclosed to prevent workers from being accidentally damaged by chain saws. For example, according to Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2004-256952), a protective fabric is placed on a desired portion of protective clothing. The protective fabric is composed of warp and weft threads and is folded and laminated in the bag body. When a chainsaw blade contacts the protective fabric, the warp threads are pulled by the blade, and the pulled warp threads become entangled with the chainsaw sprockets, stopping the chain. That is, the chain can be stopped before the blade of the chainsaw contacts the skin of the operator, thereby preventing injury to the operator.

JP-A-2004-256952

According to Patent Literature 1, the warp thread pulled by the blade of the chainsaw is stretched and torn off to become entangled with the sprocket. Therefore, it takes time for the warp to stretch and break. In addition, ten layers of protective fabrics are used, but the more fabrics are laminated, the thicker the whole protective clothing becomes, and the workability of the worker is lowered.

An object of the present invention is to provide a protective material that instantly stops the rotation of a chain saw blade and does not reduce workability, and protective footwear using this protective material.

This invention includes the first invention and the second invention.

A first invention is a protective material for protecting a worker from injuries caused by a chain saw, the protective material comprising a mesh-shaped base portion, warp threads woven into the base portion, and crossing the warp threads. Weft yarns woven in the base portion and a plurality of base fabrics containing the warp yarns are laminated, the warp yarns are a large number of synthetic fiber filament bundles that are woolly processed, and the weft yarns are straight synthetic fiber filaments. A bundle, characterized in that the warp and the weft are not fixed to the base .

The protective material in the first invention further includes an intermediate cloth disposed between the base cloths, and the intermediate cloth includes synthetic fiber filament bundles in a lattice weave.

The protective material in the first invention further includes strips of cloth disposed between the base fabrics, the strips of cloth having short sides and long sides, and one of the warp and the weft is on the long side. It includes a form in which a plurality are arranged in the short side direction while extending along.

A second invention is protective footwear comprising a footwear body and a protective material attached to the footwear body, wherein the protective material comprises a mesh-like base portion, warp threads woven into the base portion, and warp threads . Weft yarns woven in the base portion intersecting with each other, and a plurality of base fabrics including the warp yarns are a large number of woolly processed synthetic fiber filament bundles, and the weft yarns are straight synthetic A fiber filament bundle, characterized in that the warp and the weft are not fixed to the base .

The base fabric in the second invention includes a form in which warp threads and weft threads are arranged so as to intersect with respect to the axial direction of the footwear.

The protective material in the second invention includes a form in which grooves and ridges extending in the axial direction of the footwear are alternately formed.

The protective material according to the present invention is formed by laminating a plurality of base fabrics each including a mesh-like base portion and warp yarns woven into the base portion. Therefore, it is possible to suppress the spread of the warp in the thickness direction of the base fabric, and even if a plurality of layers are laminated, it is possible to suppress the overall thickness from increasing, and the workability of the operator is not lowered. In addition, since the warp threads are only woven into the base portion, they are easily and instantly pulled out of the base portion when the blade of the chainsaw comes into contact with them. The warp thread can get entangled in the sprocket of the chainsaw and instantly stop the rotation of the blade.

1 is a perspective view of a spike boot with a tip as an example of protective footwear of the present invention; FIG. FIG. 2 is a schematic diagram of the configuration of the protective material of Example 1. FIG. 1 is a schematic diagram of the configuration of the base fabric of Example 1. FIG. FIG. 2 is a schematic diagram of the structure of the intermediate cloth of Example 1; FIG. 4 is a schematic diagram showing gathering processing of the protective material of Example 1; FIG. 4 is a schematic diagram of the configuration of the protective material of Example 2;

In this embodiment, spike boots (compliant with JIS T8101) used for felling work will be described as an example of protective footwear. As shown in FIG. 1 , the tipped spike boot includes a footwear body 1 and a protective material 2 attached to the footwear body 1 . The footwear body 1 has a bottom portion 11, a ankle portion 12, and a trunk portion 13. A plurality of anti-slip spikes 14 are provided on the bottom portion 11. protect against the elements of The footwear body 1 has a rubber outer material 15 and a lining material 16 located on the opposite side. For example, double raschel can be used as the lining material 16 . A protective material 2 is arranged between the outer material 15 and the lining material 16 . In this embodiment, the protective material 2 is arranged in front of the footwear body 1 and over the ankle portion 12 and the trunk portion 13 . That is, the protective material 2 is arranged at a portion corresponding to the shin of the worker when wearing.

(Example 1)
2 to 5 show aspects of the protective material 2 in Example 1. FIG. As shown in FIG. 2, the protective material 2 has a five-layer structure, and the base fabric 3 arranged in the first layer 21, the second layer 22, the fourth layer 24, and the fifth layer 25. , and the intermediate fabric 4 arranged in the third layer 23 . In this embodiment, the first layer 21 is located on the outer material 15 side, and the fifth layer 25 is located on the lining material 16 side.

As shown in FIG. 3 , the base fabric 3 includes a mesh-like base portion 31 , warp yarns 32 woven into the base portion 31 , and weft yarns 33 intersecting the warp yarns 32 and woven into the base portion 31 . . In this embodiment the warp threads 32 and the weft threads 33 are substantially orthogonal. The warp yarns 32 are a large number of synthetic fiber filament bundles that are woolly processed. The weft 33 is a straight synthetic fiber filament bundle that is not woolly processed. Neither the warp yarns 32 nor the weft yarns 33 are fixed to the base portion 31 and are easily pulled out from the base portion 31 by being pulled from the outside. The base fabric 3 is constructed such that the weaving ratio is weft 33>warp 32>base portion 31, and the weft is preferably 50% or more.

As shown in FIG. 4, the intermediate cloth 4 is a grid weave of synthetic fiber filament bundles, and the filament bundles are not fixed to each other. Therefore, the woven filament bundle is easily unwound by external pulling.

Adjacent fabrics of the protective material 2 consisting of the base fabric 3 and the intermediate fabric 4 are connected to each other with a weak bonding force or not at all. The term “weakly connecting” refers to a state in which the filament bundles constituting the base cloth 3 and the intermediate cloth 4 are easily pulled out by pulling, although they are intermittently connected by a very weak adhesive or sewing.

The protective material 2 as described above is arranged so that the warp threads 32 and the weft threads 33 of the base fabric 3 intersect the axial direction 17 of the footwear body 1 at an angle of about 45°. The footwear main body 1 is curved from the ankle portion 12 to the trunk portion 13, but by arranging the base cloth 3 in this way, it is easy to curve along the ankle portion 12 and the trunk portion 13, and the protective material 2 is made to fit the footwear. Adhesion to the outer material 15 and the lining material 16 of the main body 1 can be facilitated. In addition, since it is easy to bend, it gives the worker who wears it a feeling of flexibility, and there is no risk of lowering work efficiency.

As shown in FIG. 5, the protective material 2 may also be gathered to form alternating grooves 26 and ridges 27 extending in the axial direction 17 . By processing in this way, it is possible to easily bend along the roundness of the body part 12 or body part 13 . The gathering process can be easily performed by, for example, sewing parallel lines extending in a direction intersecting the axial direction 17 and pulling threads to gather the fabric. Also, by intermittently sewing a plurality of parallel stitches in the axial direction 17 and pulling some of the threads more strongly than others, the gathers with short intervals between the grooves 26 and the ridges 27 can be formed. That is, it is possible to form a shape in which the portion of the thread that is strongly pulled is narrower than the other portions. By arranging this constricted portion at the boundary between the thigh portion 12 and the trunk portion 13, the protective material 2 can be brought into closer contact with the footwear main body 1. - 特許庁

The method of gathering the protective material 2 is not limited to the above method. In addition, press working can be performed in place of or in combination with gathering. Specifically, the protective material 2 is sandwiched between metal male and female molds of a desired shape, and can be shaped into the desired shape by applying pressure and heat. By forming the shape in this way, the desired shape can be maintained, and the footwear body 1 can be easily formed.

According to the tipped spike boots using the protective material 2 as described above, if the blade of the chainsaw accidentally contacts the ankle part 12 or the trunk part 13 of the footwear body 1 while rotating, the blade cuts the outer material 15. and come into contact with the filament bundle of the protective material 2 . When the blade contacts the filament bundle, it hooks it onto the blade edge and pulls it in the direction of rotation. The warp yarns 32 and the weft yarns 33 of the base fabric 3 are designed to be pulled out easily, and are instantly entangled with the cutting edge. In particular, since the warp threads 32 are wool-processed, they increase in volume as soon as they are pulled out and are caught by the edge of the blade. The filament bundle caught on the cutting edge instantly reaches the sprocket due to the rotation speed of the chainsaw, and tightens the sprocket. When the sprocket is tightened, the chain saw's safety mechanism is activated and the rotation stops.

In this embodiment the warp yarns 32 are wooly while the weft yarns 33 are not wooly. Only one of the warp 32 and the weft 33 is wool-processed and the other is straightened, so that the mutual frictional resistance can be kept within a certain range, and a structure that can be easily pulled off and easily entangled with the sprocket is realized. are doing. That is, for example, if both the warp 32 and the weft 33 are linear and the frictional resistance value is made smaller than a certain value, the drawn warp or weft will not get entangled with the sprocket of the chain saw. That is, although a large amount of filament bundles are pulled out instantaneously by contact with the blade of the chain saw, they scatter from the protective material 2 as if they were ejected, and the amount of the filament bundles reaching the sprocket and getting entangled is reduced. occur. For example, when both the warp yarn 32 and the weft yarn 33 are wool-processed and the frictional resistance value is made larger than a certain value, the chain saw blade easily cuts through the base cloth 3 itself, and the filament bundle is hardly pulled out. occur. Furthermore, since the mixed weave ratio of the weft yarn 33 that can be easily pulled out is set to 50% or more, a large amount of filament bundles to be pulled out can be secured, and a structure in which the filament bundles are reliably entwined around the sprocket is realized.

It is considered that the use of the intermediate cloth 4 increases the frictional resistance value with the base cloth 3 . It is presumed that the base cloth 3 in this embodiment has a slightly small frictional resistance value, and it is considered that this is compensated for by the intermediate cloth 4 . Therefore, the presence of the intermediate cloth 4 ensures that the filament bundles are pulled more securely in the base cloth 3 than in the absence thereof.

As described above, by using the protective material 2 in this embodiment, the rotation of the chain saw can be stopped instantaneously, and furthermore, the workability of the operator is not hindered in the spiked boot with tip using this material. Absent.
In this embodiment, the footwear used is a spiked boot with a tip, but the footwear is not limited to this. For example, it can be applied to jikatabi and other footwear. Furthermore, the protective material 2 can be used not only for footwear, but also for other wearable articles such as work clothes that require compact wearability and storability, and other articles.

In this embodiment, the base portion 31 of the base fabric 3 is composed of filament bundles made of polyester to form a mesh. The number of filaments in the base portion 31 is 36. Both the warp 32 and the weft 33 are filament bundles using polyester, and the warp 32 has 288 filaments and the weft 33 has 192 filaments.
As the intermediate cloth 4, for example, a lattice woven cloth using "Vectran (trademark)" manufactured by Kuraray Co., Ltd. can be used.

A test according to JIS T8125-3 was carried out using protective material 2 as described above. That is, the chainsaw blade in the driven state was brought into contact with the first layer 21 to the fifth layer 25 of the protective material 2 . As a result, immediately after the blade of the chain saw touched the protective material 2, a large number of filament bundles were pulled by the blade and entangled with the sprocket, and the safety device was activated to stop the blade of the chain saw. At this time, the chain saw blade did not reach the fifth layer 25 of the protective material 2 . That is, since the chain saw stops before penetrating through the protective material 2, the blade does not come into contact with the body of the operator, and a protective material that ensures safety can be provided.

In this embodiment, the base fabric 3 is used for the first layer 21, the second layer 22, the fourth layer 24 and the fifth layer 25 of the protective material 2, but the number and order are limited. not a thing Also, the intermediate cloth 4 is arranged on the third layer 23, but this can also be changed arbitrarily. The type of filament bundle used for the protective material 2 can be appropriately selected, and materials used in this field can be used.

(Example 2)
FIG. 6 shows the aspect of the protective material 2 in Example 2. As shown in FIG. The protective material 2 is composed of a plurality of base fabrics 3 and strips of cloth 5 arranged between the base fabrics 3 . The cloth strips 5 use a cloth having the same structure as the base cloth 3, and include vertical cloth strips 5A cut vertically along the warp 32 and horizontal cloth strips 5B cut horizontally along the weft 33. . The length of the short sides of the vertical strip of cloth 5A and the horizontal strip of cloth 5B is approximately 5 cm.

In this embodiment, three base fabrics 3 are provided, and the warp yarns 32 and the weft yarns 33 are arranged so as to intersect the axial direction 17 of the footwear body 1 at an angle of about 45°, as in the first embodiment. A vertical strip of cloth 5A is arranged between the first base cloth 3 and the second base cloth 3, and a horizontal strip of cloth 5B is arranged between the second and third base cloths 3. do. A plurality of vertical strips of cloth 5A are arranged without gaps in the short side direction, and are arranged so that the warp yarns 32 are parallel to the axial direction 17 . A plurality of horizontal strips of cloth 5B are similarly arranged without gaps in the short side direction, and are arranged so that the weft yarns 33 are parallel to the axial direction.

According to such a protective material 2 , by using the strip of cloth 5 extending in the axial direction 17 , it can be easily bent and can be brought into close contact with the footwear body 1 . Further, since the cutting direction intersects the axial direction 17 at a substantially right angle, when the blade of the chain saw comes into contact with the protective member 2, the long filament bundle extending in the axial direction 17 can be pulled out, effectively sprocketing. can be tightened.

When the warp yarns 32 are arranged to intersect the axial direction 17 at an angle of about 45° as in the base fabric 3, the chain saw blade also contacts the warp yarns 32 at an angle of about 45°. Such contact tends to lower the pullability of the filament bundle compared to contact with the warp yarns 32 at an angle of about 90°. However, by arranging the vertical strips of fabric 5A and the horizontal strips of fabric 5B between the base fabrics 3 as in this embodiment, these filament bundles intersect at approximately right angles to the direction of the incision, resulting in high pullability. It is possible to maintain the pull-out property of the base fabric 3, which has been lowered.

The vertical strip of cloth 5A and the horizontal strip of cloth 5B can be doubled in size in the longitudinal direction, and can be folded along a folding line crossing the longitudinal direction to form a double layer. In this case, the length of the filament bundle to be pulled out can be further increased, and the sprocket can be strongly entangled. Even in the case of stacking two sheets, the strip shape does not impair the adhesion to the footwear body 1. - 特許庁Note that the number of layers of the base fabric 3 in the protective material 2 can be changed as appropriate. Further, the number of vertical strips of cloth 5A and horizontal strips of cloth 5B and the arrangement thereof can be changed in various ways, and the dimensions thereof are not limited.

1 footwear body 2 protective material 3 base cloth 4 intermediate cloth 5 strip cloth 15 outer material 16 lining material 26 groove 27 ridge 31 base 32 warp 33 weft

Claims (6)

A protective material for protecting a worker from injuries caused by a chain saw,
The protective material is configured by laminating a plurality of base fabrics including a mesh-like base portion, warp yarns woven into the base portion, and weft yarns woven into the base portion crossing the warp yarns. ,
The protective material according to claim 1, wherein the warp is a bundle of many synthetic fiber filaments that are wool-processed, the weft is a straight synthetic fiber filament bundle, and the warp and the weft are not fixed to the base. further comprising an intermediate fabric positioned between the base fabrics;
2. The protective material according to claim 1, wherein said intermediate cloth is made of synthetic fiber filament bundles arranged in a lattice weave. Further comprising a strip of cloth arranged between the base cloths,
3. The cloth according to claim 1, wherein the strip of cloth has a short side and a long side, and one of the warp and the weft extends along the long side, and a plurality of the warps and wefts are arranged in the direction of the short side. protective material. 1. Protective footwear comprising a footwear body and protective material attached to the footwear body,
The protective material is configured by laminating a plurality of base fabrics including a mesh-like base portion, warp yarns woven into the base portion, and weft yarns woven into the base portion crossing the warp yarns. ,
The protective footwear according to claim 1, wherein the warp is a multiplicity of synthetic fiber filament bundles that are wool-processed, the weft is a straight synthetic fiber filament bundle, and the warp and the weft are not fixed to the base . 5. Protective footwear according to claim 4 , wherein the base fabric is arranged such that the warp yarns and the weft yarns cross the axial direction of the footwear. 6. Protective footwear according to claim 4 or 5 , wherein the protective material forms alternating grooves and ridges extending in the axial direction of the footwear.

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