JP2006063506A - Protective tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective tool such as foot cover or arm cover, capable of safely protecting human hands and feet by withstanding impulse force and cutting force when a sharp edged tool, particularly a rotating edged tool such as bush cutter is mistakenly brought into contact with human hands and feet. <P>SOLUTION: The protective tool has a cutting resistance layer having ≥600 g/m<SP>2</SP>total basis weight and obtained by laminating a plurality of woven or knitted fabrics composed of high-strength and high-tensile elastic fiber having at least ≥15 cN/dtex tensile strength and ≥400 cN/dtex tensile modulus and a cushion layer composed of one or a plurality of woven or knitted fabrics arranged on the inner layer surface of the cutting resistance layer and having ≥4 mm thickness and is obtained by covering the whole surface or at least surface with clothing-specified woven or knitted fabric and sewing at least the vicinity of the end face according to the shape of protective tool. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a protective device excellent in cut resistance, and more specifically, protects human limbs from injury due to blades even when a rotary blade such as a brush cutter accidentally hits the human body, particularly a human limb. It relates to protective equipment such as foot covers and arm covers.

  Persons engaged in occupations that use sharp rotary blades such as brush cutters for mowing, such as those working in agriculture and forestry, should directly touch the human body so that they will not be accidentally damaged during the work. Alternatively, a protective gear such as a foot cover or an arm cover is worn on the work clothes to protect the body. As materials for such protective equipment, conventionally, several tens of nylon or polyester woven or knitted fabrics are laminated, or these woven or knitted fabrics are coated with a synthetic resin such as polyvinyl chloride, or the woven or knitted fabric and the stiffener. However, these materials are heavy and disturbing, and workability is poor, and light materials are insufficient in terms of cut resistance.

  As for the danger of the brush cutter, the brush cutter has a 1.5 to 2.0 m class chassis with a small engine attached to the rear end, and has a rotary blade with a diameter of 20 to 30 cm at the tip. The rotary blade is usually a circular saw blade made of steel, but may be made of high-strength nylon bristles. Usually, hold the back of the chassis with your arms, hold the chassis down with the other hand down, and move the diagonally lower blade to the left and right along the ground. Move forward while mowing the grass. The left / right movement of the blade during cutting varies depending on the work situation, but is about 2 to 3 seconds for one round trip.

  The worker moves forward while cutting off the grass in front of his feet, but may stumble when the plant is long and the line of sight is bad. At this time, there is a risk that the rotating blade may be applied to the left foot by mistake. In addition, if a bee suddenly comes out and is driven away with the left hand, an erroneous operation may occur. Furthermore, there is a risk of slipping the foot on a steep slope and scooping the foot at full engine speed. Thus, unexpected things can happen in response to sudden events.

  The rotary blade is sharpened so that the grass can be cut well, so the cutting force is strong. If the engine is rotated at full speed and the moving speed is increased, it is powerful enough to cut a 5cm diameter raw tree or shrub, and this may cause the foot to be cut. In fact, there are many serious accidents caused by brush cutters, and about 10 fatal accidents occur annually. There is a demand for the development of protective equipment that protects the human body from such powerful brush cutters.

  Japanese Patent Laid-Open No. Hei 6-26877 discloses a cushioning laminate in which a knitted fabric made of high-strength and high-elasticity fibers having a tensile strength of 1.5 Gpa or more and an elastic modulus of 30 Gpa or more is used as a core layer, and a nonwoven fabric layer is formed on the inner and outer surfaces thereof. The body is mainly composed of a reinforcing layer of a knitted fabric composed of a plurality of the high-strength and high-elasticity fibers in which at least the layers constituting the surface are formed in a plurality of hooks, and the entire surface is disposed on the outer surface. A protective device excellent in cut resistance covered with a knitted fabric is disclosed in Japanese Patent Application Laid-Open No. 6128421 as a core layer of a knitted fabric made of high strength and high elastic fibers having a tensile strength of 1.5 Gpa or more and an elastic modulus of 30 Gpa or more. And a cushioning laminate comprising a non-woven fabric layer on the inner and outer surfaces thereof, and on the outer surface, a knitted fabric reinforcing layer made of at least a plurality of the high-strength and high-elastic fibers is disposed, and Protective equipment with excellent cut resistance that is covered with a knitted fabric on its entire surface. It is disclosed.

However, both of the above publications only describe that “a plurality of high-strength and high-elasticity reinforcing layers of knitted fabrics are arranged”. For example, even if a chain saw is effective, On the other hand, it is unknown. Moreover, since only the nonwoven fabric of a strong fiber is normally used as a cushioning laminated body, it cannot endure the impact force of a brush cutter and there exists a possibility that an impact damage may generate | occur | produce in a human body. Further, according to the embodiment, since the size of the protective equipment is 20 × 20 cm, only a part of the shin of the foot can be covered, which is dangerous. In addition, since the protective device is tied to a person's arm or leg with a thin string as a binding tool, when the high-speed rotating blade such as a brush cutter hits the protective equipment, the binding string is cut and the protective device is removed from the arm or leg. There is a risk of detaching and cutting arms and legs.
Japanese Patent Laid-Open No. 6-26877, page 1 Japanese Patent Application Laid-Open No. 6-18421, page 1

 The problem to be solved by the present invention is to safely protect a human limb by withstanding an impact force and a cutting force even when a sharp blade, particularly a high-speed rotary blade of a brush cutter, accidentally hits a human limb. It is to provide protective equipment such as a foot cover and an arm cover in a practical form.

The protective device of the present invention for solving the above problems has a total basis weight of 600 g / m, consisting of a plurality of woven and knitted fabrics made of high strength and high tensile elastic fibers having at least a tensile strength of 15 cN / dtex or higher and a tensile elastic modulus of 400 cN / dtex or higher. m ² or more cut-resistant layer and a cushion layer having a thickness of 4 mm or more made of one or more fabrics disposed on the inner layer surface, and the entire surface is made of the same knitted fabric as the cut-resistant layer The protective device is characterized by covering and sewing the vicinity of the end surface according to the shape of the protective device.

 As described above, the armor of the present invention is formed by laminating a cut-resistant layer and a cushion layer, and the fiber used for the cut-resistant layer has a tensile strength of 15 cN / dtex or higher, a tensile strength of 400 cN / dtex or higher, Since it is a high tensile elastic fiber, any fiber can be used as long as the cut resistance is good. Particularly, polyparaphenylene terephthalamide fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, Since polyparaphenylene benzobisoxazole fibers and the like have good cut resistance, at least one of the fibers is preferably used.

The denier and woven density of the fibers of the woven or knitted fabric used for the cut-resistant layer are not particularly limited. What is important is the total weight, and it is preferable to form a cut-resistant layer by laminating a plurality of sheets so as to be 600 g / m ² or more, preferably 750 g / m ² , more preferably 900 g / m ² or more. When the total basis weight is less than 600 g / m ² , when the high-speed rotary cutter of the brush cutter hits the operator's hand or foot, the cutter penetrates the cut-resistant layer and cuts the operator's hand or foot. This is a conclusion obtained from experimental results simulating an actual site. When the total basis weight is 1,500 to 2,000 g / m ² or more, it becomes bulky and heavy, and workability is deteriorated.

It is preferable to mix iron or stainless steel wire mesh in the cut resistant layer. The above-mentioned cut-resistant layer made only of high-strength and high-tensile elastic fiber knitted fabric has sufficient cut-resistance for thick blades such as tip saws, but cut-resistant for thin blades such as scissors. It is not sufficient in terms of the properties, and the basis weight of the cut resistant layer needs to be 900 g / m ² or more. The high-strength and high-tensile elastic fiber is expensive, and by mixing the wire mesh, it has cut resistance against thin blades such as a scissors blade, which is advantageous in terms of cost. As the wire net, it is preferable to use 1 to 3 wires made of wire having a diameter of about 0.1 to 0.3 mm and about 12 to 25 mesh. If the wire diameter is smaller than the above range and the mesh of the wire mesh increases, the possibility of cutting increases, which is dangerous, and conversely, if the wire diameter is large and the mesh of the wire mesh decreases, the blade becomes a wire mesh. It is not preferable because it may bite and cause bruises to occur, and it is heavy and loses flexibility, resulting in poor handling and attachment to limbs. If the cut-resistant layer is composed only of the wire mesh, the cut resistance to a thick blade such as a tip saw becomes insufficient. Therefore, it is preferable to mix the high strength and high tensile elastic fibers and the wire mesh.

 In the present invention, a cushion layer having a thickness of 4 mm or more, preferably 5 mm or more is laminated on the inner surface side of the cut resistant layer. Here, the thickness of the cushion layer is a value measured by lightly pressing with a micrometer. When the thickness of the cushion layer is less than 4 mm, if the blade of the brush cutter hits the operator's hand or foot, even if the blade of the brush cutter is stopped by the cut-resistant layer, the impact force of the operator's hand or foot A bruise occurs. In the case of a chain saw, it is unclear whether the cushion layer may be small. However, the protective device of the present invention aims to be able to be adapted to both safely, so the cushion layer is also a necessary item.

  As the fabric used for the cushion layer, at least one of a knitted fabric, a woven fabric and a non-woven fabric is used. In terms of cushioning properties, nonwoven fabric is the most excellent, followed by knitted fabric and woven fabric. Since non-woven fabrics have low tear strength and can be cut by the impact of blades, they should be made of non-woven fabrics made of high-strength fibers, especially the high-strength and high-elastic fibers mentioned above, and used together with knitted or woven fabrics. Is preferred. As the woven or knitted fabric, an ordinary strong woven or knitted fabric made of natural fibers, semi-synthetic fibers or synthetic fibers, preferably a soft woven or knitted fabric of these fibers, or a pile woven or knitted fabric is preferably used. In the case of using the above-mentioned nonwoven fabric or pile knitted fabric, it can be used alone if it has a thickness of 4 mm or more, but in other cases it can be said that using a plurality of layers is preferable because cushioning properties are increased.

The protective device of the present invention is a product obtained by laminating the above-mentioned cut-resistant layer and cushion layer, covering the surface or the entire surface with a garment-made knitted fabric according to the shape of the protective device, and sewing the vicinity of the end surface. . The knitted or knitted fabric to be coated is not particularly limited, and the same quality as the cut-resistant layer is best, but natural fibers and synthetic fibers having relatively high strength can be used, and the vicinity of the end face can be used. Means about 5-15mm inside from the end face. If it is less than 5 mm from the end face, it is not preferable because the ends of the plurality of woven or knitted fabrics of the cut resistant layer may be unwound when a cutter such as a brush cutter hits.

 The foot shin cover or arm cover according to the present invention is a fabric spreading material capable of covering the entire circumference of at least the shin of the foot or the forearm of the arm in a cylindrical shape, and the shin or forearm of the foot. It is a protective device having a tying tool that binds one part of both end portions wound around each other in a superposed and lightly drawn state. As the binding tool, various arbitrary binding tools such as a fastener, a fastening belt and a buckle can be used. A hook-and-loop fastener can also be used in combination with other binding tools. As the material of the tightening belt, the above-mentioned high strength and high tensile elastic fibers are used, and the fasteners and buckles are made of metal, preferably steel. Therefore, even if a high-speed rotary cutter such as a brush cutter hits a fastening belt, a fastener, a buckle or the like, it is easily cut and destroyed, and the protective equipment does not come off from the arm or foot. It must also be configured as such.

 In addition, the protective device of the present invention has one end face so that the overlapped portion does not turn when the rotary blade hits the overlapped portion by attaching both ends of the above-mentioned stitched protective device to the foot or arm. Is a protective device that is mounted on the other end surface. Specifically, when the case where the shin of the foot is covered with the above-mentioned protective gear and the both ends are overlapped and worn is assumed that the rotary blade is counterclockwise (usually counterclockwise) Look at the overlapping part from the center of the foot and place the left side outward. By arranging in this way, when the rotary blade hits the overlapped portion, the overlapped portion will not be turned over, and even if the rotating blade should hit the binding tool and damage it, the overlapped portion may turn over. It is possible to prevent the human body from being damaged.

 In the above description, an example in which the armor of the present invention is attached to a foot or an arm has been described. However, the armor of the present invention is not limited to this, and a place other than the foot or arm, that is, the head to the neck. If the armor is created and worn around the shoulders, shoulders, waist, and waist, the entire body can be protected even if the operator falls over while mowing and the rotating brush cutter is separated from both hands. Here, when the outer body and the trousers are used as the protective equipment for the whole body, the protective equipment is thick, which is not preferable because workability is deteriorated.

  Since the armor of the present invention is the armor as described above, it has the following effects.

High strength and high tensile elastic fiber with a tensile strength of 15 cN / dtex or higher, tensile modulus of 400 cN / dtex or higher, preferably polyparaphenylene terephthalamide fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, polyparaphenylene benzobisoxazole A plurality of woven and knitted fabrics made of at least one of the fibers are laminated to form a cut-resistant layer with a total basis weight of 500 g / m ² or more, so rotating blades such as brush cutters and chainsaws are mistakenly placed on workers' feet or arms. Even in the case of hitting, a blade such as a brush cutter or a chain saw is stopped by the cut resistant layer of the protective equipment of the present invention and does not reach the operator's foot or arm, so that the foot or arm is not cut.

  In addition, since the cut-resistant layer is mixed with a metal mesh made of iron or stainless steel, it exhibits excellent cut resistance even for thin blades such as a scissors blade, thereby reducing the cost.

  Furthermore, since a cushion layer consisting of one or more fabrics and having a thickness of 4 mm or more is laminated on the inner surface side of the cut-resistant layer, the blade during rotation of the brush cutter accidentally hits the operator's foot or arm. Since the impact force is also relaxed by the cushion layer and does not suffer an impact scratch, the operator's limbs can be protected from a blade such as a brush cutter or a chain saw.

  Further, the protective device as a foot cover or a shin cover has a shape capable of covering the entire circumference of the shin of the foot or the forearm, and the binding device attached to the foot or the arm has the high strength and high tensile elastic fiber and Since the protective device is made of metal (preferably made of steel), even if a high-speed rotary cutter such as a brush cutter hits the binding device, it is easily cut and destroyed, and the protective device does not come off the arm or foot.

  In addition, put both ends of the armor on top of each other, check the rotation direction of the blade so that it does not turn over when the rotating blade hits the stack, and stack one end on the other end. Because it is a protective device that is worn, the overlapping part does not turn over, and the body does not touch the blade directly, so the body can be reliably protected.

 Furthermore, when the protective device of the present invention is attached to the entire body in the shape of an armor, the entire body can be protected even if the operator falls over during mowing.

  The best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing an embodiment of a protective device (foot cover) 1A according to the present invention assuming that the protective site is a shin of the foot, and FIG. 2 is a cross-sectional view taken along the line F2-F2 of FIG. The thing of the shape of FIG. 1 is also called a fabric expansion | deployment material. As shown in FIG. 2, woven or knitted fabrics 2-1, 2-2, 2-3 made of high strength and high tensile elastic fibers are laminated to form a cut resistant layer. As the high-strength and high-tensile elastic fiber, any fiber having a tensile strength of 15 cN / dtex or more and a tensile elastic modulus of 400 cN / dtex or more can be used because it has good cut resistance. However, in particular, it is preferable to use at least one of polyparaphenylene terephthalamide fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, and polyparaphenylene benzobisoxazole fiber because cut resistance is excellent. I can say that. Only one type of these fibers may be used, but a mixture of a plurality of types of fibers may be used, or a laminate of different types of single fiber woven or knitted fabrics may be used.

The denier and woven density of this high strength and high tensile elastic fiber are not particularly limited, but from the viewpoint of the function of the cut-resistant layer, a multifilament of 200 to 3,000 denier, a woven density of 20 to 80 fibers / 25.4 It is preferably about mm. The total fabric weight of the knitted or knitted fabric is more important than the denier or woven density of these fibers. In FIG. 2, the number of the woven or knitted fabrics 2-1, 2-2, 2-3 of the cut-resistant layer is three, but the total basis weight is 600 g / m ² or more, preferably 750 g / m ² regardless of the number. As described above, it is preferable to determine the number of the woven or knitted fabrics 2-1, 2-2, 2-3 so as to be about 900 g / m ² and laminate them to form a cut resistant layer. However, if the number is too large, it becomes heavier and thicker. Therefore, in order to ensure workability, the total basis weight is preferably set to 1,500 to 2,000 g / m ² or less. In this embodiment, it is assumed that the total basis weight is 1,900 g / m ² . In this example, the product weight is 450 to 500 g.

 On the inner surface side of the cut-resistant layer, a cushion layer having a thickness of 4 mm or more made of one or more ordinary strong knitted fabrics 3-1 to 3-4 is laminated. Regardless of the number of woven or knitted fabrics, the number of ordinary strong woven or knitted fabrics 3-1 to 3-4 is determined and laminated to form a cushion layer so that the thickness is 4 mm or more. When the thickness of the cushion layer is less than 4 mm, if the cutter blade hits a human hand or foot, even if the cutter blade is stopped by the cut-resistant layer, the impact force will bruise the human hand or foot. Will occur. However, if the thickness is too thick, the workability deteriorates, so it is preferably 8 to 10 mm or less. A reinforcing layer made of a woven or knitted fabric or a thin wire mesh can be interposed between the cut layer and the cushion layer.

  As the one or more ordinary strong woven or knitted fabrics 3-1 to 3-4 of the cushion layer, woven or knitted fabric made of natural fiber, semi-synthetic fiber or synthetic fiber, preferably cotton, wool, rayon, acetate, polyamide, polyester, A soft woven or knitted fabric of fibers made of acrylonitrile, polyolefin or the like, a pile woven or knitted fabric of these fibers, or a woven or knitted fabric of these fibers is preferably mixed with a non-woven fabric, preferably a high-strength non-woven fabric. The pile woven or knitted fabric may be a loop pile or a cut pile, but the pile density may be selected so as to increase cushioning properties.

  FIG. 3 shows an embodiment of a protective device 1B using a pile fabric 4 as a woven or knitted fabric of a cushion layer. FIG. 3 is a cross-sectional view corresponding to FIG. 2. Since the pile can have a required length, even a single pile fabric 4 has good cushioning properties, but it is also effective to stack a plurality of piles.

The armor of the present invention is formed by laying woven or knitted fabrics 2-1, 2-2, 2-3 made of high strength and high tensile elastic fibers so that the total weight is 600 g / m ² as a cut resistant layer. The woven or knitted fabric 3-1 to 3-4 is laminated on the inner surface as a cushion layer with the number of woven or knitted fabrics selected so that the thickness is 4 mm or more. Cover and sew the vicinity of the end face with the sewing thread 6. The woven or knitted fabric 5 for coating is not particularly limited, and natural fibers and synthetic fibers having relatively high strength, preferably synthetic fiber fabrics such as polyester, polyamide, polyacrylonitrile and the like are used. The vicinity of the end surface is the center side of about 5 to 15 mm from the end surface and is sewn with the sewing thread 6. If it is less than 5 mm from the end face, it is not preferable because the ends of the plurality of woven or knitted fabric layers of the cut resistant layer may be unwound when a cutter such as a brush cutter hits. The fibers of the sewing thread 6 are also not particularly limited, but it is preferable to use a thick count sewing thread made of a synthetic fiber such as polyester, polyamide, polyacrylonitrile or the like that is the same as or different from the knitted fabric 5 for covering.

  Fig. 4 uses the protective device 1A shown in Fig. 1 to cover the entire circumference of the shin so that it overlaps with a part of the upper part of the safety shoe 7, and tightens the belts 8-1 and 8-2 and metal as a binding tool. The bundling rings 9-1 to 9-4 are used for bundling and fixing. As the metal binding rings 9-1 to 9-4, it is preferable to use thick steel rings.

  In the binding tool shown in FIG. 4, the fastening belts 8-1 and 8-2 are provided on the surface of the lower stacking member D, and the binding ring is provided on the surface of the upper stacking member, but this can be reversed. is there. An overlap amount of about 1 to 3 cm is sufficient. Although it depends on the finishing method of the overlapped portion, if the overlap amount exceeds 5 cm, it will be useless, so it will be kept to the minimum required amount. As for the stacking method, a left rotating blade is assumed in the plan view, and the upper member U is set to the left position as the upper side. Thereby, when the rotary blade touches, the body can be completely protected without turning over.

  As the protective gear for the foot, as shown in FIG. 5, the protective gear 1C having a shape and size capable of covering the entire circumference of the foot in the range of 10 to 30 cm above the knee from the upper part of the safety shoe is preferable. However, in order to make the inner bent portion 10 of the knee joint easier to bend, it is preferable to reduce the thickness of the protective equipment or cut out a part thereof. Even in this case, it is unlikely that the rotary blade will hit the gap, so it can be said that there is almost no problem in safety.

  In the example of FIG. 5, fastening belts 11-1, 11-2, 11-3 and metal buckles 12-1, 12-2, 12-3 are used as binding tools. Thus, at least three binding devices are required when the protective device 1C extends to the upper part of the joint.

  The fastening belts 8-1, 8-2, 11-1, 11-2, and 11-3 shown in FIGS. 4 and 5 are made of the above-mentioned high strength and high tensile elastic fibers and have a wide width. Is good. By doing in this way, even when a high-speed rotary cutter such as a brush cutter hits the tightening belt, only a break is made in the length direction of the tightening belt, and in most cases it will not be cut, so the protective equipment will come off the foot, There is no fear that the blade will hit the gap and cut the leg. Also, the metal binding rings 9-1 to 9-4 and the metal buckles 12-1, 12-2, and 12-3 should be made of thick steel, and a blade such as a brush cutter should be used once. Just hitting will not break and come off.

  As described above, the binding tool is prevented from being easily damaged by the rotary blade, but may be damaged depending on the contact condition of the blade. Therefore, in consideration of breakage due to the rotary blade, the binding tool should be placed on the back surface of the foot (rear side) or slightly on the inside.

  In both the cases of Fig. 4 and Fig. 5, the case where the armor is covered on the foot has been described. However, the same applies to the case where the arm is covered as an arm cover. Should be about 10cm above the elbow from the wrist. The brush cutter may think that protection of the arm is not necessary, but it is dangerous if the worker falls over while mowing and the rotating brush cutter leaves both hands. Depending on the content of the work, it is necessary. Further, when the brush cutter is a chainsaw, it is always necessary even if the worker does not fall down.

[Experimental Example 1]
Tensile strength 24.7cN / dtex, a tensile modulus 520cN / dtex polyparaphenylene terephthalamide fibers 20 fastest spun yarn through 68 present per 2.54 cm, weight per unit area 150g were woven in weaving density of weft 61 present per 2.54 cm / m ² Fabric T was prepared for the cut-resistant layer. A knitted fabric C having a thickness of 0.46 mm obtained by tricot knitting 100 dtex nylon 6 multifilament was prepared as a cushion layer.

Next, the number of layers of woven fabric T and knitted fabric C are stacked as shown in Table 1, cut into the shape shown in FIG. 1, covered with a commercially available polyester fabric (weight per unit area 245 g / m ² ), and 5th polyester spinning Sewing 10mm from the end face with a thread, attach an 18mm wide fastening belt and a steel fastening ring, and test brushes P1, P2, and P3 (P1 is an example, P2 and P3 are comparative examples) Tested using a testing machine. Although the actual number of tests is large, only three examples are shown.

  FIG. 6 is a perspective view of a testing machine manufactured to examine the cut resistance of the protective equipment of the present invention. The brush cutter 13 is BC3510 manufactured by Komatsu Zenoah, and the tip saw 14 is SRS-5 (40 blades, diameter 255 mm, blade thickness 1.25 mm). As shown in Fig. 6, a stainless steel pipe 15 with an outer diameter of 60 mm is fixed vertically on the base BS, and the outer diameter is adjusted to 75 mm by wrapping gum tape around the outer periphery, and a paper with an inner diameter of 75 mm and a wall thickness of 7.5 mm A tube 16 is inserted and a test sample 17 is wound around it.

  On the base BS that supports the pipe 15, a support base BX is provided at a certain distance, and the driving brush POL that simulates the actual cutting state by supporting the brush cutter 13 obliquely on the support base BX. Is provided. The drive rod POL is rotatable on the support base BX, and has a support portion TOP that supports the brush cutter obliquely at its upper end and moves the blade horizontally, and below that, between the support base BX. The cylinders 18-1 and 18-2 are provided for ejecting the drive rod POL at a constant speed.

  On the other hand, a pressure sensor PS capable of detecting the pressure received by the paper tube 16 is provided on the surface of the pipe 15. Therefore, the testing machine can drive the tip saw 14 with respect to the test sample 17 by simulating an actual cutting situation. The driving speed can be determined by the ejection speed of the cylinders 18-1 and 18-2.

表１の実験結果等から、織物Tは3枚以下は絶対不可で、目付600g/m²以上、好ましくは750g/m²以上必要である。また、これに加えて織物Tは６枚では不十分で４mm以上が必要である。本件防護具のような安全具は、実験に実験を重ね、実際に安全が確かめられたものについてのみ実用化されねばならぬこと当然である。 As the setting conditions, adjust the pressure of the air cylinders 18-1 and 18-2 so that the rotational speed of the tip saw 14 is 5000 rpm, the static load on the protective equipment sample is 1.2 kg, and the dynamic load is 4.05 kg. The tip saw 14 was applied to the test sample while applying pressure to the air cylinders 18-1 and 18-2, and the cutting state of the test sample and the impact trace of the paper tube were examined. The results are shown in Table 1.

From the experimental results in Table 1 and the like, it is absolutely impossible for the fabric T to be 3 or less, and the basis weight is 600 g / m ² or more, preferably 750 g / m ² or more. In addition to this, 6 pieces of fabric T are not sufficient, and 4 mm or more is necessary. As a matter of course, safety equipment such as this protective equipment must be put into practical use only for those that have been tested and confirmed to be safe.

  As is clear from the above results, even when the blade during high-speed rotation of the brush cutter hits the armor of the present invention, it is stopped by the cut-resistant layer of the armor of the present invention. Never reach and do not cut legs or arms. Moreover, the impact force is also relieved by the cushion layer and does not suffer from impact scratches. Therefore, it is possible to protect the operator's limbs from the blade during high-speed rotation of the brush cutter.

  FIG. 7 is a cross-sectional view corresponding to FIG. 2, showing an embodiment of the protective device 1C of the present invention in which a wire mesh 1M is mixed in the cut resistant layer and a nonwoven fabric 3F is mixed in the cushion layer.

  The protective devices 1A and 2A shown in FIG. 2 and FIG. 3 have sufficient cut resistance for thick blades such as tip saws, but are not resistant to thin blades such as scissors. However, it is not sufficient, and the cushion layer may be cut.

  For thin blades such as scissors, it is preferable to mix a wire mesh 1M in the cut-resistant layer as shown in FIG. As the material of the wire mesh, soft iron, steel, or stainless steel is used, but stainless steel is particularly preferable because it has rust prevention, is tenacious, and is difficult to cut. As the wire mesh, it is preferable to use 1 to 3 wires made of wire having a diameter of about 0.1 to 0.3 mm and having an opening of about 12 to 25 mesh. In the embodiment of FIG. 7, the wire mesh 1M is used between the knitted fabrics 2-1 and 2-2 of the cut-resistant layer, but the wire mesh 1M is woven and knitted fabric 2-1 and 2-2 of the outermost layer or the cut-resistant layer. And cushion layer 3-1 to 3-3. Further, the tricot knitted fabric may be interposed between the knitted fabric 5 for covering and the woven knitted fabric 2-1 of the cut resistant layer, or between the wire mesh 1M and the knitted knitted fabric of the cut resistant layer.

  In the embodiment of FIG. 7, tricot knitted fabrics 3-1 to 3-3 and a thick nonwoven fabric 3F are mixed as cushion layers. Nonwoven fabric has better cushioning properties than woven or knitted fabric, but has low tear strength, so it may be cut by the impact of the blade, and use high-strength fibers, especially nonwoven fabrics made of the above-mentioned high strength and high elasticity fibers. Is good. Furthermore, the possibility of cutting due to the impact of the blade is further reduced by mixing it with the knitted fabric of the cushion layer. One non-woven fabric having a thickness of about 2 to 4 mm is used, and mixed with several of the tricot knitted fabrics, the total thickness is 4 mm or more, preferably 5 mm or more.

[Experiment 2]
In addition to cut-resistant layer fabric T and cushion tricot knitted fabric C prepared in Experimental Example 1, 18 mesh mesh M made of stainless steel wire with a diameter of 0.2 mm and polyparaphenylene terephthalamide fiber weight of 400 g A non-woven fabric F having a thickness of 3 mm / m ² was prepared.

Next, the knitted fabric C, wire mesh M, woven fabric T, and nonwoven fabric F are laminated in the number shown in Table 2, cut in the same manner as in Experimental Example 1, covered with a commercially available polyester fabric, an 18 mm wide fastening belt and steel fastening. Attach a ring to prepare test samples P4, P5, and P6 (P4 and P5 are examples, P6 is a comparative example), and use a scissors blade (40 blades, diameter 255mm, thickness) instead of a tip saw in the test machine of Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1 except that 1.6 mm) was attached. The results are shown in Table 2.

From the experimental results shown in Table 2, it can be seen that it is not possible to use T5 woven fabrics for the blade, and a basis weight of 900 g / m ² or more is required. On the other hand, when two wire meshes are mixed, it can be seen that even three fabric Ts (450 g / m ² per unit area) have sufficient cut resistance.

  In the above description, the brush cutter has been described, but it goes without saying that the protective device of the present invention is effective for a chain saw and other electric cutters as well as the brush cutter. The present invention is not limited to the above-described embodiment, and can be implemented in various modes by making other appropriate design changes.

It is the top view made into the fabric development view which shows one Embodiment of the protector of this invention. FIG. 2 is a cross-sectional view taken along arrow F2-F2 in FIG. It is sectional drawing equivalent to FIG. 2 which shows one Embodiment using a pile fabric as a woven / knitted fabric of a cushion layer. It is the side view which covered and fixed the whole foot shin using the protector of this invention. It is the side view which carried out covering fixation of the foot circumference in the range of 10-30 cm above the knee from the upper part of safety shoes using other protective equipment of the present invention. It is a perspective view of the brush cutter testing machine manufactured in order to investigate the cut resistance of the armor of this invention. It is sectional drawing equivalent to FIG. 2 which shows one Embodiment of the armor of this invention which mixed the wire mesh in the cut-resistant layer, and mixed the nonwoven fabric in the cushion layer.

Explanation of symbols

1A, 1B, 1C Protective equipment
2-1, 2-2, 2-3 Woven knitted fabric made of high strength and high tensile elastic fiber
3-1 to 3-4 Woven knitting
4 Pile fabric
5 Coated knitted fabric
6 Sewing thread
7 Safety shoes
8-1,8-2 Tightening belt
9-1 to 9-4 Binding ring
10 Inner bend
11-1,11-2,11-3 Tightening belt
12-1,12-2,12-3 metal buckle
13 Brush cutter
14 Tipsaw
15 Stainless pipe
16 paper tube
17 Test sample
18-1,18-2 Air cylinder
1M wire mesh
3F non-woven fabric
BS base
BX support stand
POL drive
TOP support
PS pressure sensor

Claims (6)

At least a tensile strength 15 cN / dtex or more, a tensile modulus of 400 cN / dtex or more high strength and high tensile woven made of elastic fibers consisting of knitted plurality total basis weight in 600 g / m ² or more耐切Soso, arranged on its inner surface And a cushion layer having a thickness of 4 mm or more made of one or more pieces of fabric, the entire surface or at least the surface thereof is covered with a woven or knitted fabric of clothing specifications, and at least the vicinity of the end surface according to the shape of the protective equipment Protective equipment characterized by sewing.   2. The high-strength and high-tensile elastic fiber comprises at least one of polyparaphenylene terephthalamide fiber, wholly aromatic polyester fiber, ultrahigh molecular weight polyethylene fiber, and polyparaphenylene benzobisoxazole fiber. Protective equipment as described in.   The armor according to claim 1, wherein the cut-resistant layer is mixed with a metal mesh made of iron or stainless steel.   Bundling in which the entire circumference of the shin of the foot or forearm is covered with a tubular material, wound around the shin of the foot or the forearm, and a part of both ends overlapped and pulled together The protective device according to claim 1, further comprising a device.   The protective device according to claim 4, wherein the binding tool is composed of a combination member of the high tensile elastic fiber and metal.   The protective device according to claim 4, wherein when the rotary blade hits the overlapping portion, the overlapping portion does not turn over.

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