JP6078357B2 - Fire hose - Google Patents

Description

  The present invention relates to a fire hose, and more particularly, to a fire hose that is excellent in wear resistance (abrasion resistance), is familiar to fingers, and is excellent in durability and operability.

  Conventionally, most of the fire hoses used in Japan use a cylindrical jacket made of a tubular fabric woven by interweaving warps arranged in the circumferential direction of the hose with warps arranged in the longitudinal direction of the hose. The warp yarn is a polyester spun yarn and the weft yarn is a polyester filament yarn.

  The reason is usually that the warp yarns almost completely cover the outer surface of the hose (the outer surface of the cylindrical jacket), but when the warp yarn is a spun yarn, the spun yarn is an aggregate of short fibers, so It is thought that it has a lot of fuzz on the outer surface of the jacket, which provides the advantage that it is easy to handle and hold, and as a result, it is easy to grip and operate with fingers. Is.

  On the other hand, fire hoses that use polyester multifilament yarn for warp have been studied in recent years, but because it is an aggregate of filament fibers (continuous long fibers), the outer surface of the cylindrical jacket has no fuzz and is familiar to the hand. It is difficult and difficult to grip because it is slippery. Therefore, it was usually used limitedly for fire hydrant hoses and the like.

  On the other hand, in order to maintain the strength and durability of the yarn as an aggregate of short fibers, the spun yarn is an essential element to have a twist, and a sufficient and appropriate actual twist is imparted thereto. Therefore, the yarn is tightened as a whole and is not bulky. The fact that the spun yarn is tight and poor in bulk as a whole is that the cylindrical jacket itself is bulky and thick under the form that the warp yarn almost covers the outer surface of the hose (the outer surface of the cylindrical jacket). Is refused to increase without increasing the total weight of the cylindrical jacket (total weight of yarn used).

  In order to give a little bulkiness to the spun yarn itself, it is conceivable to reduce the level of the actual twist (twist number, twist coefficient) that is imparted when forming the spun yarn. It is not preferable because the constituent short fibers fall off or come off and the yarn strength decreases.

  If the bulkiness and thickness of the cylindrical jacket itself can be increased without increasing the overall weight of the cylindrical jacket (total thread use weight), the bulk of the firefighting hose can be increased by the bulkiness and thickness. It can be expected to improve wear resistance (abrasion resistance). In other words, even if the overall thickness of the cylindrical jacket (total weight of yarn used) increases, even if the thickness of the cylindrical jacket is increased by that amount, the total weight increases and the wear (wear) tends to increase due to its own weight increase. In the first place, an increase in weight is undesirable because it causes a deterioration in handling and operability as a fire hose.

  As yarn types for weaving a cylindrical jacket constituting a fire hose, there is a prior art in which spun yarn (spun yarn) and filament yarn of recycled polyester are described in parallel and disclosed (Patent Document 1 (paragraph 0020, etc.) )).

  In addition, there is a proposal on a fire hose that uses filament yarn and spun yarn or bulky processed yarn alternately as warp yarns (Patent Document 2 (Claim 1 etc.)). There is a description that a spun yarn or a bulky processed yarn excellent in durability against rubbing and trauma was used for the warp knitting yarn (Patent Document 2 (paragraph 0002)).

  However, Patent Document 1 recommends the use of a spun yarn as the warp, and does not disclose the use of a filament yarn for the warp.

  In addition, in Patent Document 2, there is no specific description relating to the use of a spun yarn or a bulky processed yarn. This is to obtain a good handling effect by increasing the frictional resistance between the yarns (Patent Document 2 (paragraph 0013)), and the warp basically pursued by the present invention is based on a single type of use. However, this does not improve the wear resistance (abrasion resistance) of the fire hose as a whole.

JP 2004-19783 A JP 2007-64370 A

  In view of the above-mentioned points, the object of the present invention is to significantly improve the wear resistance without substantially increasing the weight of the cylindrical jacket, in particular, compared with the level of the conventional fire hose. It is to provide a fire hose that can be used.

The fire hose of the present invention that achieves the above-described object has the following configuration (1).
(1) Fire fighting hose using a cylindrical jacket made of a tubular fabric made by weaving warps arranged in the longitudinal direction of the hose and wefts arranged in the circumferential direction of the hose. yarn Ri name using a single type of a folded and twisted yarn of the combined plurality of twisted, the are those synthetic fibers bulky crimped yarn of 165～660Dtex, twisting the synthetic fibers bulky crimped yarn present 2 to 36 A hose for fire fighting , wherein the twisted yarns are formed to form a cylindrical jacket having a thickness of 0.5 to 4.0 mm .

In the fire hose of the present invention, more preferably, the fire hose has any one of the following configurations (2) to ( 9 ).
(2) The fire hose according to the above (1), wherein the synthetic fiber bulky crimped yarn is a false twist crimped yarn.
(3) The above-mentioned (1) or (2), wherein the synthetic fiber bulky crimped yarn is a crimped interlaced yarn having alternately spread portions and entangled portions in the yarn length direction. The listed fire hose.
(4) The fire hose according to (3), wherein the crimped interlaced yarn has 30 to 120 / m of entangled portions per length of the yarn.
(5) The above synthetic fibers (1) to (4), wherein the synthetic fiber bulky crimped yarn has a crimp rate of 20 to 50% and a crimp number of 9 to 30 peaks / 25.4 mm. Fire hose according to any one of the above.
(6) The fire hose according to any one of (1) to ( 5 ), wherein the weft yarn includes a non-bulky synthetic fiber multifilament yarn.
( 7 ) The fire hose according to any one of (1) to ( 5 ) above, wherein the weft yarn comprises a non-bulky synthetic fiber monofilament yarn.
( 8 ) The fire hose according to any one of (1) to ( 7 ), wherein the synthetic fiber bulky crimped yarn used for the warp is made of a polyester-based synthetic fiber.
( 9 ) The fire hose according to any one of (1) to ( 8 ), wherein the weft yarn is made of a non-bulky multifilament yarn or a non-bulky monofilament yarn made of polyester synthetic fiber.

  According to the fire hose of the present invention according to claim 1, the bulkiness and thickness of the cylindrical jacket are remarkably increased without substantially increasing the weight of the cylindrical jacket as compared with the level of the conventional fire hose. As a result, a fire hose with significantly improved wear resistance (abrasion resistance) is provided.

According to any one of the fire hoses of the present invention according to claims 2 to 9 , a fire hose having a clearer and greater effect of the fire hose of the present invention according to claim 1 described above is provided.

As a typical process example for producing a crimped interlaced yarn which is a preferable example of a bulky crimped yarn used as a warp hose of the present invention, an interlaced nozzle is incorporated in a false twisting process. It is the schematic model figure which showed the example of a process.

  Hereinafter, the fire hose of the present invention will be described in more detail.

  The fire hose of the present invention is a fire hose using a cylindrical jacket made of a tubular woven fabric obtained by interweaving a warp arranged in the hose circumferential direction with a warp arranged in the hose longitudinal direction. It is characterized by using a twisted yarn obtained by twisting a plurality of bulky crimped yarns.

  In the present invention, the synthetic fiber bulky crimped yarn refers to a synthetic fiber multifilament yarn that has been bulked by crimping the synthetic fiber multifilament yarn by crimping, and the crimping process includes false twisting, There are indentation, shaping, and abrasion. In the present invention, in terms of controllability of the level of bulkiness obtained, the point that three-dimensional crimps that increase the effects of the present invention can be obtained, productivity, production control, etc. Is preferred.

  In addition, the synthetic fiber bulky crimped yarn is an interlaced yarn having alternately opened portions and entangled portions in the yarn length direction, which is a bulky yarn and is excellent in handling as a woven yarn. This is preferable in that it can provide excellent sizing properties, sizing properties, and excellent weaving properties. Interlaced yarns inject a high-pressure air stream from a direction perpendicular to the traveling direction of the multifilament yarn, and the filaments are intermittently entangled so that the entangled portion and the spread portion are separated. It can be obtained by applying so-called interlace processing, which is alternately formed in the yarn length direction.

  According to the fire hose of the present invention, since the bulky crimped yarn made of synthetic fiber used as warp is bulky based on the crimped structure, a twisted yarn obtained by twisting a plurality of the yarns Is a bulky, cylindrical jacket woven with the same weave structure, the same level of weave density, and the same level of fabric (jacket) weight using spun yarn or filament yarn of the same level or fineness (dtex) as before The bulkiness and thickness of the cylindrical jacket can be remarkably increased as compared with the above level. The effect of significantly increasing the bulkiness / thickness of the cylindrical jacket is to use the same level of count or fineness (dtex) spun yarn or filament yarn, and weave with the same weave structure and the same level of weave density. Therefore, an increase in the weight of the entire cylindrical jacket can be obtained practically without incurring it.

  As a result, the durability against wear (abrasion) caused by the fire hose being dragged while continuing to discharge water at high pressure at a fire site or the like can be significantly improved. In particular, the wear (wear) of the fire hose that is received in this way is such that the lining and the cylindrical jacket constituting the hose are little by little as the fire hose receives frictional force with the ground or the like during fire fighting activities. It is worn away by cutting, and the thicker cylindrical jacket provides superior durability against wear (abrasion).

  It is important that the increase in thickness does not substantially increase the weight of the entire cylindrical jacket, and it is particularly effective to use a bulky crimped yarn of synthetic fiber.

  In other words, using a thread that simply increases the total weight of the cylindrical jacket as the thickness increases increases the operability and handling of the fire hose, and increases wear (wear) due to increased weight. Since there are some effects, it is difficult to obtain the effect of the present invention as in the case where there is no weight change.

  In addition, according to the fire hose of the present invention, since there is a crimp structure (loop, sagging) with a bulky warp filament of the warp on the surface of the cylindrical jacket, it is straight when gripped with fingers. There is no slip as in the case of synthetic fiber filament yarns, it is well-familiar with fingers and is easy to handle.

  In the fire hose of the present invention, when the synthetic fiber bulky crimped yarn is a crimped interlaced yarn, the number of entangled portions per length of the yarn is preferably 30 to 120 / m. This is because the bulky crimped yarn is imparted with appropriate convergence and brings about good weaving properties. When the number of entangled portions is less than 30 pieces / m, the converging effect is reduced, and when it is more than 120 pieces / m, it is bulky in the state of being present in the jacket after weaving. The thickness (corresponding to the thickness of the jacket) may not be fully exhibited, which is not preferable.

  Although the synthetic fiber bulky crimped yarn used in the present invention is not particularly limited, the crimp rate is 20 to 50% and the number of crimps in order to obtain the above-described effects of the present invention. It is preferable that it is in the range of 9-30 peaks / 25.4 mm. When the range of the crimp rate and the number of crimps is smaller than the above range, the bulkiness effect becomes small, and it becomes difficult to sufficiently obtain the effect of the present invention.

  Preferably, the synthetic fiber bulky crimped yarn is 165 to 660 dtex, and further, 2 to 36 synthetic fiber bulky crimped yarns are twisted to form a twisted yarn. It is preferable. By using such a thread, the thickness of the cylindrical jacket can be easily set within a preferable range of 0.5 mm to 4.0 mm in order to obtain the effects of the present invention. Although the thickness of a cylindrical jacket is not specifically limited, It is preferable that it exists in the range of 0.5 mm-4 mm, More preferably, it exists in the range of 1.0 mm-3.0 mm. When these ranges are satisfied, the above-described effects of the present invention can be realized without impairing other functions (water discharge amount, hose inner diameter, lining thickness, etc.) required for the fire hose.

  In the present invention, the weft yarn preferably comprises a non-bulky synthetic fiber multifilament yarn. More preferably, the weft yarn is a non-bulky synthetic fiber multifilament yarn, and the weft yarn being non-bulky can reveal more warp yarns, thereby increasing the effect of the bulky crimp structure of the warp yarns. This is because it can be sufficiently exerted. The non-bulky synthetic fiber multifilament yarn used as the weft is not particularly limited, but is preferably composed of, for example, a twisted yarn obtained by twisting several 1100 dtex or 1650 dtex yarns.

  It is also preferred that the weft yarn comprises a non-bulky synthetic fiber monofilament yarn. More preferably, the weft is 100% synthetic fiber monofilament yarn or a mixture of non-bulk synthetic fiber monofilament yarn and non-bulk synthetic fiber multifilament yarn. This is because if the weft includes a synthetic fiber monofilament yarn, the entire hose can be provided with an appropriate shape retaining property, and the operability and the hose retaining property can be further improved.

  The synthetic fiber bulky crimped yarn used as warp is preferably made of polyester synthetic fiber. A polyester synthetic fiber is preferable in terms of good dimensional stability against heat and water and strength, and is also excellent as a bulky crimped yarn. For the same reason, it is preferable that the multifilament yarn or the monofilament yarn is made of a polyester synthetic fiber.

  As the jacket, a weave structure such as plain weave or twill weave can be adopted, in particular, basically the same as a conventional fire hose.

  Generally, the number of warp driven yarns is preferably 24 to 33 yarns / cm, more preferably 25 to 30 yarns / cm, although it varies depending on the hose diameter. This is because the effect of the present invention can be remarkably obtained by using a relatively larger number of warps and total weight. For the same reason, the preferred ratio of warp weight / weft weight is 2.0 / 1.0 to 4.0 / 1.0. This is because the effects of the present invention can be obtained more clearly when more warps are present. In this respect, a more preferable ratio of warp weight / weft weight is 2.5 / 1.0 to 3.0 / 1.0. Further, the number of wefts driven in is preferably 3 to 6 / cm.

  Synthetic fiber bulky crimped yarn used for warp is a three-dimensional, uniform and fine that is a false-twisted crimped yarn obtained by a false twisting method having a twisting-heat setting-untwisting process. This is preferable in that the helical crimps can be stably obtained.

  That is, even a synthetic fiber bulky crimped yarn has a generally two-dimensional crimped structure, such as an indented crimped yarn, a shaped crimped yarn, a knit denit crimped yarn, and a flawed crimped yarn. Or the like may be less effective for increasing the jacket thickness, and is not preferable to a bulky crimped yarn by false twisting.

  In addition, when the synthetic fiber bulky crimped yarn is a false twist crimped yarn, the processed yarn may have a yarn torque, so that the handleability may not be good, so the twisting-heat setting-untwisting step A modified false twist crimped yarn that has been subjected to secondary heat setting after the false twisting process may be used.

  The false twisting may be either a continuous type or a batch type as long as it takes a processing process having a twisting-heat setting-untwisting process. The false twisting method is also a circumscribed friction disk method, an inscribed type. Any of a mold friction cylinder method, a pin false twist method, an air false twist method and the like may be used. Among them, the triaxial circumscribed type friction disk system that can stably and reliably perform false twisting on the synthetic fiber multifilament yarn running at high speed is preferable.

  When interlace processing is performed, it may be performed either before or after crimping. Since it takes a processing method of blowing a high-pressure air stream to a multifilament yarn that travels at high speed, it is practical and preferable to combine it with false twisting, which is a crimping method at high speed.

  FIG. 1 is a schematic view showing a typical process example for producing a false twisted interlace yarn which is a preferred example of a bulky crimped yarn used as a warp for a cylindrical jacket according to the present invention.

  Reference numeral 1 denotes a supply yarn package. A supply yarn Y, which is a multifilament yarn made of a thermoplastic synthetic fiber, drawn from the package 1 passes through a yarn guide 2 and passes from a first feed roll 3 to a yarn guide 4. Then, a false twisting process comprising a twisting-heat fixing-untwisting process composed of a false twisting heater 5, a false twisting device 6, and a second feed roll 7 made of a hot plate is applied. Reference numeral 6 denotes a false twisting device, which is, for example, a triaxial circumscribed friction disk type, and applies twist to the traveling multifilament yarn. The twist goes back to the vicinity of the yarn guide 4 and the first feed 3, undergoes heat fixing treatment from the false twist heater 5 in the twisted state, and further passes through the false twist device 6, and the yarn Y 1 passes through the false twist device 6. As soon as it passes, it is untwisted and cooled. The twisted gusset imparted by the heat setting treatment in the above twisted state becomes crimped, and the yarn Y1 at this stage is the above-described false twisted yarn (so-called Woolley processed yarn).

  Further, reference numeral 8 denotes an interlacing nozzle, which has a thread passage such as a columnar shape or a triangular prism shape, and injects a high-pressure air flow from the side wall side to the yarn Y1 running through the nozzle passage. By receiving the injection of the high-pressure air stream, an interlaced portion is intermittently formed on the false twisted yarn, and a false twisted interlaced yarn Y2 having interlaced portions and opening portions alternately in the yarn length direction is manufactured. Is done.

  In FIG. 1, 9 is a third feed roller, 10 is a yarn guide, 11 is a traverse device, 12 is a take-up roller, and 13 is a take-up yarn package. In general, the number of false twists is preferably 2500 to 4000 T / m. When using crimped multifilament yarn by false twisting for warp, use either the above-mentioned woolen yarn or modified false twisted crimped yarn that is heat-set with a secondary heater after false twisting. can do. Such a process is basically known in the textile field for clothing as disclosed in JP-A-51-64048.

  The fire hose of the present invention will be described more specifically with reference to examples.

Example 1
Polyester false twisted multifilament yarn (crimped interlaced yarn) of 165 dtex × 48 filament yarn / 2 × 5 twisted twisted twisted yarn (about 1650 dtex) is used as warp, and polyester fumar as weft A plain weave cylindrical jacket with an inner diameter of 65 mm was woven using the filament yarn 1100 dtex × 4 twisted yarns and the number of wefts driven was 43/10 cm. The number of warps driven in was 27.5 / cm, and the warp weight / weft weight ratio in the jacket was 2.6 / 1.

  The thickness of the jacket is 1.25 mm. Using a polyurethane resin as a lining layer (thickness 0.27 mm), a fire hose was obtained. The polyester false twisted crimped multifilament yarn used for the warp has a crimp rate of 24 ± 4%, a number of crimps of 25 / 25.4 mm, and a number of entangled portions of 100 ± 10 pieces / m. The hose weight per unit length was 251 g / m.

Example 2
Polyester false twisted crimped multifilament yarn (wooly processed yarn) of 165 dtex × 48 filament yarn / 2 × 5 twisted twisted twisted yarn (about 1650 dtex) is used as warp, and polyester filament yarn as weft A plain weave cylindrical jacket with an inner diameter of 65 mm was woven using 1100 dtex × 4 twisted yarns and the number of wefts driven was 43/10 cm. The number of warps driven in was 27.5 / cm, and the warp weight / weft weight ratio in the jacket was 2.6 / 1. The polyester false twisted crimped multifilament yarn is the same as in Example 1 except that it has not undergone interlacing.

  The thickness of the jacket is 1.24 mm. Using a polyurethane resin as a lining layer (thickness 0.27 mm), a fire hose was obtained. The polyester false twisted crimped multifilament yarn (Woolen yarn) used for the warp has a number of crimps of 20 ± 5 threads / 25.4 mm per single fiber. The hose weight per unit length was 251 g / m.

Comparative Example 1
Polyester spun yarn 20s (cotton count) x 6 twisted twisted twisted yarn (twisted yarn fineness of about 1755 dtex) is used as the warp, and polyester filament yarn 1100 dtex x 4 twist yarn is used as the weft, and the weft A plain weaving cylindrical jacket having an inner diameter of 65 mm was woven with the number of drivings being 43/10 cm. The number of warps driven in was 27.5 / cm, and the warp weight / weft weight ratio in the jacket was 2.6 / 1.

  The thickness of the jacket is 1.10 mm. Using a polyurethane resin as a lining layer (thickness 0.27 mm), a fire hose was obtained. The hose weight per unit length was 253 g / m.

Comparative Example 2
Polyester multifilament yarn (non-crimped yarn) 572 1650 dtex × 288 filament yarn is used for warp, polyester filament yarn 1100 dtex × 4 twist yarn is used as the weft, and 43 wefts are driven A plain-woven cylindrical jacket with an inner diameter of 65 mm was woven at / 10 cm. The number of warps driven in was 27.5 / cm, and the warp weight / weft weight ratio in the jacket was 2.6 / 1.

  The thickness of the jacket is 1.08 mm. Using a polyurethane resin as a lining layer (thickness 0.27 mm), a fire hose was obtained. The polyester multifilament yarn used for the warp is a straight non-crimped yarn called a drawn yarn.

  Article 17 (Ministry of Ordinance No. 27 (Revised Ministry of Ordinance No. 44)) that stipulates technical standards for fire fighting hoses for each fire hose of Example 1, Comparative Example 1 and Comparative Example 2 described above Was evaluated according to the “Abrasion Resistance” test method described in.

  The results of the evaluation are as described in Table 1. According to the present invention, the fire hose can be configured by increasing the jacket thickness without substantially increasing the hose weight. It can be seen that a fire hose with very good wear resistance can be obtained based on the thickness.

  Specifically, the fire hose of the present invention has wear resistance (times) and is 1 in comparison with a case where a spun yarn or a non-crimped yarn is used as a warp (Comparative Example 1 and Comparative Example 2). It can be seen that the wear frequency is increased by about 5 to 1.7 times, and the wear resistance is remarkably excellent.

1: feed yarn package 2, 4, 10: yarn guide 3: first feed roll 5: false twist heater 6: false twist device 7: second feed roll 8: interlace nozzle 9: third feed roll 11: traverse Device 12: Winding roller 13: Winding yarn package Y: Yarn (feed yarn)
Y1: Yarn (false twisted yarn)
Y2: Yarn (false twisted interlaced yarn)

Claims (9)

In a fire hose using a cylindrical jacket made of a tubular woven fabric obtained by interweaving warps arranged in the hose circumferential direction with warps arranged in the hose longitudinal direction, a plurality of synthetic fiber bulky crimped yarns are used as the warp Ri Na by using a single type of twisted yarn tailored present twisting, the are those synthetic fibers bulky crimped yarn of 165～660Dtex, the synthetic fibers bulky crimped yarn 2 to 36 present twisted by the A fire hose comprising a twisted yarn and a cylindrical jacket having a thickness of 0.5 to 4.0 mm .   The fire hose according to claim 1, wherein the synthetic fiber bulky crimped yarn is a false twist crimped yarn.   The fire hose according to claim 1 or 2, wherein the synthetic fiber bulky crimped yarn is a crimped interlaced yarn having alternately opened portions and entangled portions in the yarn length direction.   4. The fire hose according to claim 3, wherein the crimped interlaced yarn has 30 to 120 / m of entangled portions per length of the yarn.   The synthetic fiber bulky crimped yarn has a crimp rate of 20 to 50% and a number of crimps of 9 to 30 threads / 25.4 mm. Fire hose. The fire hose according to any one of claims 1 to 5 , wherein the weft yarn comprises a non-bulky synthetic fiber multifilament yarn. The fire hose according to any one of claims 1 to 5 , wherein the weft yarn comprises a non-bulky synthetic fiber monofilament yarn. The fire hose according to any one of claims 1 to 7 , wherein the synthetic fiber bulky crimped yarn used for the warp is made of polyester synthetic fiber. The fire hose according to any one of claims 1 to 8 , wherein the weft yarn is made of a non-bulky multifilament yarn or a non-bulky monofilament yarn made of polyester synthetic fiber.

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