Flexible hose

Abstract

To easily take out a conductor 15 from a reinforcing body 17. In addition, generation of large signal noise in the conductive wire 15 due to a spark or the like caused by static electricity is suppressed.SOLUTION: The flexible hose 10 has a hose wall 11, a reinforcing body 17 joined to the hose wall, and a conductor 15 embedded in the reinforcing body. The hose wall 11 is formed of a soft synthetic resin in a cylindrical shape. The reinforcing body 17 is spirally provided on the outer periphery of the hose wall. The reinforcing body 17 includes a base part 12 and a cover part 13, and the base part 12 and the cover part 13 are laminated in the hose radial direction. The base portion 12 is formed of a hard synthetic resin and is joined to the outer periphery of the hose wall 11. The cover portion 13 is formed of a hard synthetic resin and is joined to the outer periphery of the base portion 12. The conductive wire 15 is disposed at a portion where the base portion 12 and the cover portion 13 are joined, and is embedded in the reinforcement body 17. The cover part 13 projects from the base part 12 in the longitudinal direction of the hose.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a flexible hose. [Background technology]

[0002] Flexible hoses, which have a reinforcing member spirally bonded to the periphery of the flexible hose wall, are used in a variety of applications, including as hoses for transporting gases, such as air blowing tubes, and as hoses for transporting liquids, such as beverages, cooling water, and wastewater.

[0003] Furthermore, if the flexible hose is provided with a conductor, the conductor can be used to transmit power or signals, or the hose can be heated by generating heat through the conductor with an electric current, which is convenient. For example, Patent Document 1 discloses a flexible hose (a hose for electric vacuum cleaners) in which a reinforcing body made of hard synthetic resin is spirally joined and integrated to the outer periphery of a flexible hose wall made of thermoplastic elastomer, and in this flexible hose, a conductor is loosely inserted inside the reinforcing body so as to be movable. This flexible hose can prevent breakage of the conductors that transmit power and signals through the flexible hose. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-262446 Summary of the Invention [Problem to be solved by the invention]

[0005] When using a flexible hose such as that described in Patent Document 1, the conductor wires arranged inside the reinforcing body at the end of the hose must be pulled out from the reinforcing body as needed for wiring. If the conductor wires break when being pulled out, the hose becomes defective. In addition, pulling the conductor wires out of the reinforcing body made of hard synthetic resin without breaking them is a difficult and tedious task.

[0006] Furthermore, when using a flexible hose such as that described in Patent Document 1, static electricity can be generated due to the interaction between the flexible hose and the surrounding environment, resulting in a discharge (spark). If this occurs and the insulation around the conductor is broken, a large amount of signal noise can be generated in the conductor, which can cause errors in the control and operation of devices that use the conductor.

[0007] A first object of the present invention is to make it easier to remove a conductor from a reinforcing member in a flexible hose, and a second object of the present invention is to prevent large signal noise from being generated in the conductor due to sparks caused by static electricity, etc. [Means for solving the problem]

[0008] After extensive research, the inventor discovered that by stacking the base and cover portions to form the reinforcing body, placing the conductor wire at the part where the base and cover portions are joined, and further making the cover portion extend further out in the longitudinal direction of the hose than the base portion, the conductor wire can be easily removed from the reinforcing body and the insulation of the conductor wire embedded in the reinforcing body is less likely to be broken, and thus completed the present invention.

[0009] The present invention is a flexible hose having a hose wall, a reinforcing body joined to the hose wall, and a conductor embedded in the reinforcing body, wherein the hose wall is formed in a cylindrical shape from a soft synthetic resin, the reinforcing body is provided in a spiral shape on the outer periphery of the hose wall, the reinforcing body includes a base and a cover portion, the base and the cover portion are laminated in the radial direction of the hose, the base is formed from a hard synthetic resin and joined to the outer periphery of the hose wall, the cover portion is formed from a hard synthetic resin and joined to the outer periphery of the base, the conductor is arranged at the portion where the base and the cover portion are joined and is embedded in the reinforcing body, and the cover portion protrudes in the longitudinal direction of the hose beyond the base (first invention).

[0010] In the first aspect of the invention, the cover preferably extends beyond the base on both sides in the longitudinal direction of the hose (second aspect of the invention).Furthermore, in the second aspect of the invention, the cover and the base are preferably formed from the same hard synthetic resin, and the cover and the base are welded together (third aspect of the invention). The present invention also provides a method for manufacturing the flexible hose of the first invention, comprising: a first step of spirally winding a flexible strip made of soft synthetic resin and having a predetermined cross-sectional shape around a hose forming shaft and joining the side edges of adjacent flexible strips to form a tubular hose wall; a second step of extruding hard synthetic resin in a string-like shape with the predetermined cross-sectional shape and winding it spirally around the outer periphery of the hose wall formed in the first step to form a base and joining it to the hose wall; a third step of spirally winding a conductor wire around the outer periphery of the base formed in the second step and arranging the conductor wire on the outer periphery of the base; and a fourth step of extruding hard synthetic resin in a string-like shape with the predetermined cross-sectional shape and winding it spirally around the outer periphery of the base so as to cover the base formed in the second step and the conductor wire arranged in the third step to form a cover portion and joining the cover portion to the base to form a reinforcing member (fourth invention). [Effects of the Invention]

[0011] According to the flexible hose of the present invention (first invention), the conductor can be easily removed from the reinforcing member, and further, the generation of large signal noise in the conductor due to sparks caused by static electricity or the like can be suppressed.

[0012] Furthermore, when the second aspect of the invention is adopted, the generation of signal noise can be further suppressed. Furthermore, when the third aspect of the invention is adopted, the hose can be manufactured efficiently and the conductor can be more easily removed from the reinforcing member. Furthermore, according to the method for manufacturing a flexible hose of the fourth aspect of the invention, a flexible hose can be efficiently manufactured in which the conductor can be easily removed from the reinforcing member and the generation of large signal noise can be suppressed. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a partial cross-sectional view of the flexible hose of the first embodiment. [Figure 2] 1 is a cross-sectional view of a hose wall and a reinforcing body portion of a flexible hose according to a first embodiment. [Figure 3] 3A to 3C are schematic diagrams illustrating a method for manufacturing the flexible hose of the first embodiment. [Figure 4] 5A to 5C are schematic diagrams illustrating a process of extracting a lead wire from a reinforcing body of the flexible hose of the first embodiment. [Figure 5] 1A and 1B are schematic diagrams illustrating the resistance to sparks of the flexible hose of the first embodiment and a flexible hose of the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, with reference to the drawings, an embodiment of the present invention will be described, taking as an example a flexible hose that can be used as an air supply hose for a respirator. The present invention is not limited to the specific embodiment shown below, and can be practiced by modifying the form.

[0015] FIG. 1 shows a flexible hose 10 according to a first embodiment. FIG. 2 shows a more detailed cross section of the flexible hose 10. The flexible hose 10 includes a hose wall 11, a reinforcing member 17, and a conductor 15. The hose wall 11 is cylindrical. The reinforcing member 17 is joined to the hose wall 11 and is spiral. The conductor 15 is embedded in the reinforcing member 17. In this embodiment, the reinforcing member 17 is provided in a single spiral, but the reinforcing member 17 may be provided in two or more spirals. The reinforcing member 17 is joined to the outer periphery of the hose wall 11. The reinforcing member 17 and the hose wall 11 may be joined using an adhesive, by welding, or by a mechanical joint such as a locking, engaging, or embedding structure. The reinforcing member 17 may be joined to the outer periphery of the hose wall 11, or a portion of the reinforcing member 17 may be embedded in the outer periphery of the hose wall 11.

[0016] The hose wall 11 is made of a flexible synthetic resin and is cylindrical. For example, the hose wall 11 may be formed by spirally winding a flexible strip T1 made of a flexible synthetic resin and having a predetermined cross-sectional shape, and then joining the side edges T1A, T1B of adjacent flexible strips. Alternatively, the hose wall 11 may be formed by extruding the flexible synthetic resin into a cylindrical shape. The flexibility of the hose wall 11 allows the hose to deform flexibly. The side edges T1A, T1B of the strip may be joined by butting the side edges together, or by overlapping the side edges as shown. The side edges of the strip may be joined by adhesive or welding.

[0017] The specific shape of the hose wall 11 is not particularly limited as long as it is cylindrical. The hose wall 11 may be, for example, accordion-shaped. The hose wall 11 may be shaped such that the portions between the reinforcing members 17, 17 bulge outward from the hose, or conversely, may be shaped such that the portions between the reinforcing members 17, 17 are recessed inward from the hose. The hose wall may have thick and thin portions.

[0018] The reinforcing member 17 is provided in a spiral shape on the outer periphery of the hose wall 11. The spiral reinforcing member 17 maintains the cylindrical shape of the flexible hose 10.

[0019] The structure of the reinforcing member 17 and the arrangement of the conductor wires 15 will be described in detail below with reference to FIG. The reinforcing body 17 includes a base portion 12 and a cover portion 13. The reinforcing body 17 may further include other portions. In the reinforcing body 17, the base portion 12 and the cover portion 13 are layered in the radial direction of the hose. That is, the base portion 12 is provided in a spiral shape, and the cover portion 13 is provided in a spiral shape so as to cover the base portion 12. That is, the base portion 12 and the cover portion 13 overlap each other.

[0020] The base 12 is made of a hard synthetic resin and is joined to the outer periphery of the hose wall 11. The hose wall 11 and the base 12 may be joined using an adhesive, by welding, or mechanically by a locking, engaging, embedding, or other structure. The specific shape of the base 12 is not particularly limited, but typically has a rectangular or oval cross section as shown in Figure 2.

[0021] The cover portion 13 is formed from a hard synthetic resin and is joined to the outer periphery of the base portion 12. There are no particular limitations on the method for joining the cover portion 13 and the base portion 12, but it is preferable that they be joined using an adhesive or by welding.

[0022] The terms "soft" and "hard" used to describe the soft synthetic resin that constitutes the hose wall 11 and the hard synthetic resin that constitutes the base 12 and cover 13 refer to relative hardness. That is, the hard synthetic resin that constitutes the base 12 and cover 13, which serve as the reinforcing body 17, has a higher hardness than the soft synthetic resin that constitutes the hose wall 11. Preferably, the combination of the soft synthetic resin that constitutes the hose wall 11 and the hard synthetic resin that constitutes the base 12 is selected to be a combination of synthetic resins that have good adhesiveness and weldability to each other.

[0023] The soft synthetic resin constituting the hose wall 11 is not particularly limited, but examples thereof include thermoplastic resins such as soft polyvinyl chloride resin, polyvinyl acetate resin, EVA resin, low-density polyethylene resin, and polyurethane resin, thermoplastic elastomers, and mixtures thereof, as well as thermosetting resins (rubbers) such as silicone rubber and acrylonitrile butadiene rubber (NBR rubber).Although not essential, the soft synthetic resin constituting the hose wall 11 preferably has a hardness of, for example, 40 to 90 degrees, more preferably 50 to 80 degrees, in Duro A hardness.

[0024] The hard synthetic resin constituting the base portion 12 and the hard synthetic resin constituting the cover portion 13 may be different hard synthetic resins or the same hard synthetic resin, but if they are the same hard synthetic resin, they have better adhesiveness and weldability to each other, which is preferable. Although not essential, in the flexible hose 10 of this embodiment, the base portion 12 and the cover portion 13 are formed from the same hard synthetic resin, and the cover portion 13 and the base portion 12 are welded together.

[0025] The hard synthetic resin constituting the base 12 and the cover 13 (reinforcement 17) is not particularly limited, but examples thereof include thermoplastic resins such as hard vinyl chloride resin, polypropylene resin, high-density polyethylene resin, and polyethylene terephthalate resin (PET resin), mixtures of these resins, and thermosetting resins such as hard rubber. Although not essential, the hard synthetic resin constituting the base 12 and the cover 13 preferably has a hardness of, for example, 30 to 90 degrees, more preferably 40 to 80 degrees, in Duro-D hardness.

[0026] In the flexible hose 10, the conductors 15, 15 are arranged at the portion where the base 12 and the cover 13 are joined (the boundary / joint surface between the base 12 and the cover 13) and are embedded in the reinforcing body 17. That is, the conductors 15, 15 are arranged so as to be sandwiched between the base 12 and the cover 13, and are covered by the base 12 and the cover 13 so as not to be exposed to the outside. In this embodiment, three conductors are embedded in one reinforcing body 17, but the number of conductors in one reinforcing body 17 may be one, two, or four or more. For example, one conductor 15 may be arranged in each of the reinforcing bodies 17, 17 provided in two spirals, so that the flexible hose 10 is provided with two conductors.

[0027] Although not required, when multiple conductors 15, 15 are arranged on one reinforcement member 17, each conductor should be provided with an insulating coating or spaced apart to prevent short circuits. It is also preferable to color-code the conductor coating so that the conductors can be identified at the end of the hose. It is also preferable that the conductors 15, 15 are not adhered to the reinforcement member 17, base 12, or cover member 13, or that even if they are adhered / bonded, they can be easily peeled off.

[0028] In the flexible hose 10 of this embodiment, the cover portion 13 protrudes in the longitudinal direction of the hose beyond the base portion 12. That is, as shown in Fig. 2, the width WC of the cover portion 13 is greater than the width WB of the base portion 12. Here, the widths of the base portion 12 and the cover portion 13 refer to the lengths of the cross sections of the base portion 12 and the cover portion 13 along the longitudinal direction of the hose in a cross section taken along a plane including the hose central axis m as shown in Fig. 2.

[0029] Because the cover portion 13 protrudes further in the longitudinal direction of the hose (left and right direction in Figure 2) than the base portion 12, the portion 17c where the cover portion 13 and the base portion 12 are welded (joined) and which appears on the surface of the reinforcement body 17 (joint surface) is not directly visible from the outside of the hose due to the protruding portion 13a of the cover portion, and the protruding portion 13a hides the portion 17c.

[0030] Preferably, like the flexible hose 10 of this embodiment, the cover portion 13 extends from the base portion 12 on both sides in the longitudinal direction of the hose (that is, both to the right and left in FIG. 2 from the base portion 12).

[0031] When flexible hose 10 has two or more reinforcing members, all of the reinforcing members may be, but need not be, as shown in Figure 2. Flexible hose 10 may include reinforcing members in which no conductive wires 15 are embedded.

[0032] The flexible hose 10 may include other elements. For example, the flexible hose 10 may include an insulating layer or a protective cover layer on the outer periphery of the hose, closer to the hose wall 11 or the reinforcing member 17. The flexible hose 10 may also include a sensor or the like integrated into the outer periphery of the hose wall 11.

[0033] The flexible hose 10 of the above embodiment can be used as an air supply hose for a ventilator in a medical setting, etc. A one-touch connector may be integrated into the end of the flexible hose 10 to facilitate attachment and detachment of the hose to the ventilator main body or the patient's mask. The conductors 15, 15 of the flexible hose 10 can transmit electrical signals, supply power, or heat the hose.

[0034] An example of a manufacturing method for flexible hose 10 is described with reference to Figure 3. Flexible hose 10 can be manufactured using known hose manufacturing methods. For example, soft polyvinyl chloride resin is extruded in a semi-molten state to form strip T1 having the cross-sectional shape shown in Figure 3, and strip T1 is fed, while the resin is still softened, to a known hose forming shaft SFT capable of spiral feed motion. Strip T1 is spirally wound on hose forming shaft SFT, and both side edges T1A, T1B overlap and are welded together to form cylindrical hose wall 11 (first step).

[0035] Meanwhile, semi-molten rigid vinyl chloride resin is extruded into a string-like shape with a roughly rectangular cross section (strip S12 in FIG. 3) and supplied onto the outer periphery of the hose wall 11 being formed on the hose forming shaft SFT. The rigid vinyl chloride resin strip S12 then spirally winds to form the base 12, which is then welded and joined to the outer periphery of the hose wall 11. (Second Step)

[0036] After the base 12 is formed, the conductors 15 are spirally wound around the outer periphery of the base 12 formed in the second step, and the conductors 15 are arranged around the outer periphery of the base 12. Preferably, the conductors 15 are arranged so as to be positioned at the center of the width direction (left-right direction in FIG. 3) of the base 12 (third step).

[0037] Furthermore, following the placement of the conductors 15, 15, a hard synthetic resin is extruded into a string-like shape with a predetermined cross-sectional shape (strip S13 in FIG. 3), and the strip S13 is spirally wound around the outer periphery of the base 12 so as to cover the base 12 formed in the second step and the conductors 15, 15 placed in the third step, forming the cover 13, and bonding the cover 13 to the base 12 to form the reinforcing body 17 (fourth step). The bonding is preferably performed with an adhesive or by welding.

[0038] 3, these first to fourth steps are carried out in parallel on the hose forming shaft SFT to realize the specific structures of the reinforcing body 17 and the conductors 15, 15 of the flexible hose 10 of the above embodiment. Thereafter, the hose wall 11 and reinforcing body 17 (base portion 12, cover portion 13) formed into predetermined shapes are cooled or the like to fix their respective shapes, and the flexible hose 10 is manufactured.

[0039] The above manufacturing method can be modified as appropriate depending on the materials that make up the hose wall 11, base 12, cover 13, and conductor 15, or whether the hose wall, base, and cover are joined by welding or adhesive. Furthermore, if the flexible hose 10 has other elements, the other elements may be integrated on the hose forming shaft, or the other elements may be added in a separate process after the process using the hose forming shaft is completed.

[0040] The following describes the operation and effect of the flexible hose 10 of the above embodiment. According to the flexible hose 10, the reinforcement body 17 includes a base portion 12 and a cover portion 13, the base portion 12 and the cover portion 13 are stacked in the radial direction of the hose, the cover portion 13 is joined to the outer periphery of the base portion 12, the conductors 15, 15 are disposed at the portion where the base portion 12 and the cover portion 13 are joined and are embedded in the reinforcement body 17, and the cover portion 13 protrudes further in the longitudinal direction of the hose than the base portion 12, making it easier to remove the conductors 15, 15 from the reinforcement body 17 and further suppressing large signal noise from the conductors 15, 15 due to sparks caused by static electricity or the like.

[0041] To pull out the conductors 15, 15 from the reinforcing member 17 of the flexible hose 10 of the above embodiment, first, as shown in FIG. 4(a), the reinforcing member 17 located at the distal end of the hose is clamped between the tips C, C of nippers along the joint surface between the base portion 12 and the cover portion 13. Then, the tips C, C of the nippers act like wedges, separating the base portion 12 and the cover portion 13 at the joint surface. This exposes the conductors 15, 15 that were clamped between the base portion 12 and the cover portion 13 (FIG. 4(b)). In particular, when the base portion 12 and the cover portion 13 are joined by adhesive or welding, the joint is weaker in strength than the synthetic resin base material, and therefore the base portion 12 and the cover portion 13 can be easily separated by using the joint.

[0042] Alternatively, at the hose end portion of reinforcement 17, protruding portions 13a, 13a of cover portion 13 may be pinched with pliers to compress and deform cover portion 13 in the hose longitudinal direction, separating cover portion 13 from base portion 12. When protruding portions 13a, 13a are pinched with pliers and compressed, base portion 12 and cover portion 13 can be separated at the joint surface, which is a weak point, and base 12 and hose wall 11 are less likely to be damaged.

[0043] Once the base 12 and cover 13 are separated at the end of the reinforcing member 17, the two are manually pulled apart to separate the base 12 and cover 13 over a predetermined length. The exposed conductors 15 can then be pulled out of the reinforcing member without applying a large force to the conductors 15 or contacting them with a blade. Pulling out the conductors in this manner reduces the risk of breakage or damage to the conductors.

[0044] Furthermore, in the flexible hose 10 of the above embodiment, the conductors 15, 15 are arranged between the base 12 and the cover 13 that constitute the reinforcing body 17, so that when pulling out the conductors, there is no need to make any adjustments to the part where the reinforcing body 17 and the hose wall 11 are joined, thereby reducing the risk of damaging the hose wall 11 during the work of pulling out the conductors.

[0045] Next, we will explain the effect of suppressing damage from sparks from outside the hose. Figure 5(b) shows an example of a structure based on conventional technology, specifically, an example of a flexible hose 99 in which conductors 15, 15 are arranged around the periphery of a hose wall 11 and a reinforcing member 9 is arranged to cover the conductors 15, 15. In a flexible hose 99 with this structure, the interface where the reinforcing member 9 and the hose wall 11 are joined is likely to be a weak point through which the insulation up to the conductors 15 is broken when static electricity or other sparks occur. Furthermore, in the flexible hose 99, the end 9c of the interface where the reinforcing member 9 and the hose wall 11 are joined is visible from the outside of the hose. Therefore, a spark SPK can directly strike the end 9c of the interface, easily generating large signal noise in the conductors 15, 15.

[0046] On the other hand, in the flexible hose 10 of the above embodiment, as shown in FIG. 5( a), the cover portion 13 extends further in the hose longitudinal direction than the base portion 12. Therefore, the portion 17c, where the cover portion 13 and the base portion 12 are joined (the joint surface) and appears on the surface of the reinforcement body 17, is not directly visible from the outside of the hose. Therefore, even if a spark SPK is about to occur due to static electricity or the like, the spark SPK will not directly strike the portion 17c. Instead, the spark SPK will first strike the cover portion 13, then travel along the surface of the cover portion (indicated by the dotted arrow) to the portion 17c, and then flow toward the conductors 15, 15. This longer discharge path makes it less likely for a discharge (spark) to occur. In other words, the spark SPK is prevented from directly striking the portion 17c, and the generation of large signal noise in the conductors 15, 15 due to the spark SPK is suppressed.

[0047] Although not required, when the cover portion 13 extends out from the base portion 12 on both sides of the length of the hose, as in the flexible hose 10 of the above embodiment, the portions 17c on both sides of the reinforcement body 17 where the cover portion 13 and the base portion 12 are joined and appear on the surface of the reinforcement body 17 cannot be seen directly from outside the hose, which more effectively prevents large signal noise from being generated in the conductors 15, 15 by sparks SPK.

[0048] Furthermore, although not essential, if the cover portion 13 and the base portion 12 are formed from the same hard synthetic resin and are welded together, as in the flexible hose 10 of the above embodiment, the flexible hose 10 can be manufactured efficiently while reducing the number (types) of resin materials that make up the flexible hose 10.

[0049] The above-described method for manufacturing a flexible hose includes a first step of spirally winding a flexible strip made of soft synthetic resin having a predetermined cross-sectional shape around a hose forming shaft and joining the side edges of adjacent flexible strips to form a cylindrical hose wall; a second step of extruding a string of hard synthetic resin having a predetermined cross-sectional shape and winding it spirally around the outer periphery of the hose wall formed in the first step to form a base and join it to the hose wall; and a second step of spirally winding a conducting wire around the outer periphery of the base formed in the second step to arrange the conducting wire on the outer periphery of the base. and a fourth step of forming a cover by extruding a hard synthetic resin into a string shape with a predetermined cross-sectional shape and spirally winding the string around the outer periphery of the base so as to cover the base formed in the second step and the conductor arranged in the third step, while joining the cover and the base to form a reinforcing body.This makes it possible to efficiently manufacture a flexible hose 10 that makes it easy to remove the conductor 15 from the reinforcing body 17 and that can suppress the generation of large signal noise, while utilizing an existing hose forming shaft SFT.

[0050] The invention is not limited to the above-described embodiment, and various modifications can be made to the invention. Other embodiments of the invention will be described below, focusing on differences from the above-described embodiment, and detailed descriptions of similarities will be omitted. Furthermore, these embodiments can be implemented by combining parts of them with each other or by substituting parts of them.

[0051] The specific shape of the cover portion 13 can be changed. For example, the cover portion 13 may be hollow. The cover portion 13 may also have ridges on the outer periphery of the hose. The outer surface of the cover portion 13 may also have a plurality of grooves or ridges arranged side by side. Such a cover portion is effective in suppressing the generation of loud noise due to sparks.

[0052] In the description of the above embodiment, a flexible hose that can be used as an air supply hose for a respirator has been described as an example, but the flexible hose of the above embodiment can also be applied to technical fields other than those exemplified in the above embodiment. For example, the flexible hoses can be widely used as hoses for transporting liquids or gases, such as water supply hoses, drain hoses, hoses for transporting beverages or liquid foods, air supply hoses, air guide hoses, air supply hoses, exhaust hoses, etc. In this case, the material, shape, dimensions, etc. can be appropriately changed depending on the characteristics required of the hose in each field.

[0053] Furthermore, in the above embodiment, an example has been described in which a cylindrical hose wall is formed by spirally winding and joining strips made of soft synthetic resin, but the method of forming hose wall 11 and flexible hose 10 is not limited to this, and for example, the flexible hose may be obtained by rotating a cylindrically extruded hose wall as a core material and sequentially stacking base 12, conductor 15, and cover 13 in a spiral shape around it. In other words, the method of manufacturing flexible hose 10 described above is not limited to the above manufacturing method, and flexible hose 10 can also be obtained by other manufacturing methods. [Industrial Applicability]

[0054] The flexible hose of the above embodiment can be used as a hose for a respiratory apparatus, and has high industrial applicability. [Explanation of symbols]

[0055] 10 Flexible hose 11 Hose Wall 12 base 13 Cover 15 Conductor 17 Reinforcement T1 stripe T1A, T1B side edge

Claims

1. A flexible hose having a hose wall, a reinforcing member joined to the hose wall, and a conducting wire embedded in the reinforcing member, The hose wall is made of soft synthetic resin and is cylindrical. The reinforcing member is spirally provided on the outer periphery of the hose wall, The reinforcing body includes a base portion and a cover portion, and the base portion and the cover portion are laminated in the radial direction of the hose. The base is made of a hard synthetic resin and is joined to the outer periphery of the hose wall. The cover is made of a hard synthetic resin and is joined to the outer periphery of the base. The conductive wire is disposed at a portion where the base portion and the cover portion are joined and is embedded in the reinforcing member, The cover part protrudes in the longitudinal direction of the hose more than the base part. Flexible hose.

2. The cover portion protrudes from the base portion on both sides in the longitudinal direction of the hose. The flexible hose of claim 1 .

3. The cover and base are made of the same hard synthetic resin, and are welded together.

3. The flexible hose of claim 2.

4. 2. A method for manufacturing a flexible hose according to claim 1, comprising: a first step of spirally winding flexible strips made of soft synthetic resin and having a predetermined cross-sectional shape around a hose forming shaft and joining the side edges of adjacent flexible strips to form a cylindrical hose wall; a second step of extruding a hard synthetic resin into a string shape with a predetermined cross-sectional shape and spirally winding the string around the outer periphery of the hose wall formed in the first step to form a base and bond the string to the hose wall; a third step of spirally winding a conductive wire around the outer periphery of the base portion formed in the second step to arrange the conductive wire around the outer periphery of the base portion; and a fourth step of extruding a hard synthetic resin into a string shape with a predetermined cross-sectional shape, and spirally winding the string around the outer periphery of the base so as to cover the base formed in the second step and the conductor arranged in the third step, thereby forming a cover portion, and joining the cover portion and the base portion to form a reinforcing body. A method for manufacturing a flexible hose.

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