阅读说明：本技术 软管构造体 (Hose structure ) 是由 前田达也 于 2017-04-24 设计创作，主要内容包括：软管构造体具备：圆筒状的内构件,其供流体流通；和外构件,其包括覆盖内构件的弹性构件,内构件构成为能够沿着延伸方向伸缩,内构件在沿着延伸方向收缩的状态下,内构件的在径向上突出的山部分和在该径向上凹陷的谷部分沿着延伸方向重复。(The hose structure is provided with: a cylindrical inner member through which a fluid flows; and an outer member including an elastic member covering the inner member, the inner member being configured to be capable of expanding and contracting in an extending direction, a mountain portion of the inner member protruding in a radial direction and a valley portion of the inner member recessed in the radial direction being overlapped in the extending direction in a state where the inner member is contracted in the extending direction.)

1. A hose structure in which a hose having a hose core and a hose core is wound around a winding core,

the hose structure is provided with:

A cylindrical inner member through which a fluid flows; and

An outer member including an elastic member covering the inner member,

The inner member is configured to be capable of telescoping in an extension direction,

In a state where the inner member is contracted in the extending direction, a mountain portion of the inner member protruding in a radial direction and a valley portion of the inner member recessed in the radial direction are repeated in the extending direction.

2. The hose construction of claim 1 wherein,

The outer member has a groove portion recessed along the radial direction.

3. The hose construction of claim 2 wherein,

The groove portions are formed at positions corresponding to the valley portions of the inner member.

4. The hose construction of claim 3 wherein,

The inner member is elongated in the extending direction by expanding the mountain portions and the valley portions in the extending direction, and contracted in the extending direction by contracting the mountain portions and the valley portions in the extending direction,

The outer member has: a thin portion in which the groove portion is formed; and a thick portion formed thicker than the thin portion, wherein the outer member is expanded in the extending direction by expanding the thin portion in the extending direction, and contracted in the extending direction by contracting the thin portion in the extending direction.

5. The hose structure according to any one of claims 2 to 4,

The outer member has the elastic member and an application portion covering the elastic member.

Technical Field

The present disclosure relates to a hose structure.

Background

Patent document 1 discloses a corrugated tube (bellows) formed from a thin tube material made of a synthetic resin having a linear cylindrical shape.

disclosure of Invention

Problems to be solved by the invention

The bellows hose described in patent document 1 is configured such that a liquid flows through a corrugated water passage member and the bellows hose is expandable and contractible in an extending direction. In such a bellows hose, the corrugated water passage member directly contacts the floor surface or the like. This may cause damage to the water passage member. In light of the above, it is desirable to improve durability of the corrugated hose. On the other hand, it is necessary to avoid impairing the stretchability in the extending direction, which is a feature of the corrugated hose. From the above, a structure that achieves both stretchability and durability is desired.

Accordingly, an object of the present disclosure is to provide a hose structure having both stretchability and durability.

Means for solving the problems

A hose structure according to one aspect of the present disclosure includes: a cylindrical inner member through which a fluid flows; and an outer member including an elastic member covering the inner member, the inner member being configured to be expandable and contractible along an extending direction, and in a state where the inner member is contracted along the extending direction, a mountain portion of the inner member protruding in a radial direction and a valley portion of the inner member recessed in the radial direction are repeated along the extending direction.

With the hose structure of the present disclosure, in a contracted state, the outer member covers, for example, a corrugated inner member that repeats mountain portions and valley portions. Therefore, the inner member through which the fluid flows does not directly contact the ground or the like, and the durability of the inner member can be improved. Further, the outer member covering the inner member includes an elastic member, whereby the stretchability of the inner member is not impaired even when covered with the outer member. As described above, according to the hose structure of the present disclosure, both the stretchability and the durability of the inner member can be achieved.

In the above-described hose structure, the outer member may have a groove portion recessed in the radial direction. This makes it possible to provide a thin portion in the outer member and to facilitate expansion and contraction of the outer member, thereby further ensuring the stretchability of the inner member covered with the outer member.

In the hose structure, the groove portion may be formed at a position corresponding to the valley portion of the inner member. For an inner member such as a bellows shape that repeats mountain portions and valley portions, the valley portions mainly expand and contract due to expansion and contraction. Therefore, by forming a groove portion that is formed thin (easily expandable and contractible) at a position corresponding to the valley portion, the stretchability of the inner member can be further ensured. In addition, although the outer member is mainly configured such that the positions corresponding to the peak portions of the inner member contact the ground or the like, the groove portions are formed at the positions corresponding to the valley portions where contact with the ground or the like is unlikely to occur, whereby the above-described stretchability can be improved, and the durability can be ensured while suppressing breakage during stretching and shrinking.

In the above-described hose structure, the inner member may be configured to expand in the extending direction by expanding the peak portions and the trough portions in the extending direction, and contract in the extending direction by contracting the peak portions and the trough portions in the extending direction, and the outer member may be configured to include: a thin portion having a groove portion formed therein; and a thick portion formed thicker than the thin portion, wherein the outer member is expanded in the extending direction by expanding the thin portion in the extending direction and contracted in the extending direction by contracting the thin portion in the extending direction. This makes it possible to reliably realize a structure that ensures the stretching performance in the extension direction by the groove portion of the outer member.

in the above-described hose structure, the outer member may have an elastic member and an application section covering the elastic member. By configuring the outer member to include not only the elastic member but also the coating portion covering the elastic member, the durability of the outer member and the inner member can be further improved.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present disclosure, a hose structure having both stretchability and durability can be provided.

Drawings

Fig. 1 is a perspective view of a hose structure according to embodiment 1.

Fig. 2 is a view schematically showing the inner member and the outer member in a water non-passage state.

Fig. 3 is a view schematically showing the inner member and the outer member in a water-free state in the hose structure according to embodiment 2.

Fig. 4 is a view schematically showing the inner member and the outer member in a water-free state in the hose structure according to embodiment 3.

FIG. 5 is a view schematically showing the inner member and the outer member of the hose structure according to embodiment 4 in a water-free state.

Detailed Description

[ embodiment 1 ]

Hereinafter, embodiment 1 will be described in detail with reference to the drawings. In the description, the same elements or elements having the same function are denoted by the same reference numerals, and redundant description thereof is omitted.

(hose structure)

As shown in fig. 1, the hose structure 1 includes: a hose part 10, a liquid source connector 11, a nozzle connector 12, and a nozzle part 13. The hose structure 1 is configured to be transportable, and has a function of supplying a liquid (fluid) such as water from a supply source (liquid source) outdoors or indoors. In the present embodiment, a case where the hose structure 1 for supplying a fluid is used for supplying a liquid will be described, but a hose structure for supplying a gas may be used.

The hose part 10 is an elongated hollow tube for transporting a liquid supplied from a liquid source. The hose portion 10 conveys a liquid such as water. In the present embodiment, a case where the hose portion 10 is used to convey water is described, but the present invention is not limited thereto, and may be used to convey other liquid, for example. The hose portion 10 is described as being connected to a water supply facility (for example, a faucet of tap water) as a liquid source via the liquid source connector 11, but is not limited to this, and may be indirectly connected to the water supply facility via not only the liquid source connector 11 but also another hose or the like. The hose portion 10 is in a state of being expanded by the water pressure in a water passage state (a state in which water flows), and in a state of being contracted by being released from the water pressure in a water non-passage state (a state in which water does not flow). In this manner, the hose portion 10 is configured to be expandable and contractible. Details of the hose portion 10 are discussed later.

The liquid source connector 11 is a connector for connecting the water supply device and the hose portion 10. The liquid source connector 11 is connected to the proximal end side of the tube portion 10. That is, the liquid source connector 11 is an inlet for water supplied from the water supply facility to the hose portion 10.

The nozzle connector 12 is a connector for connecting the hose part 10 and the nozzle part 13. The nozzle connector 12 is connected to the distal end side of the hose portion 10. That is, the nozzle connector 12 is an outlet port for water sent from the hose portion 10 to the nozzle portion 13.

The nozzle portion 13 is a watering nozzle for spraying water supplied from the water supply facility through the hose portion 10 to a water supply target. The nozzle section 13 has a lance grip 14 and a nozzle mesh 15. The gun handle 14 of the nozzle portion 13 is gripped (pressed) by a user, and the nozzle portion 13 discharges water from the nozzle net 15.

(details of hose section)

Next, the hose portion 10 will be described in detail with reference to fig. 2. The hose portion 10 includes an inner member 16 and an outer member 17. The inner member 16 and the outer member 17 are connected to the liquid source connector 11 at their proximal ends and to the nozzle connector 12 (see fig. 1) at their distal ends.

The inner member 16 is a cylindrical water passage through which water flows. The inner member 16 is a corrugated hose configured to be expandable and contractible in a water conveying direction (extending direction) according to a water pressure. That is, the inner member 16 is configured to repeat so-called mountain folding and valley folding (a configuration in which the repeated cross-section is inverted V-shaped and V-shaped), and mountain portions 16a protruding in the radial direction and valley portions 16b recessed in the radial direction are repeated in the extending direction in a state of being contracted in the extending direction. The inner member 16 is elongated in the extending direction by expanding the mountain portions 16a and the valley portions 16b in the extending direction, and is contracted in the extending direction by contracting the mountain portions 16a and the valley portions 16b in the extending direction. The inner member 16 is closely attached to the outer member 17 at the ridge portion 16 a. In the water-passing state, the valley portions 16b expand radially outward (toward the mountain portions 16 a) due to the water pressure, whereby the inner member 16 expands in the extending direction. On the other hand, in the water non-passage state, the water pressure is released to return the valley portion 16b radially inward, and the inner member 16 is contracted to its original state (the state shown in fig. 2).

the inner member 16 is formed of a rigid material such as polyethylene or polyvinyl chloride. The length of the inner member 16 in the extending direction is, for example, about 5m to 50m, for example, 15m, in the extended state. The length of the inner member 16 in the extending direction is, for example, about 2.5m to 25m, for example, 7.5m, in the contracted state. The inner diameter (inner diameter of the portion to which water is fed) of the inner member 16 is set to, for exampleThe wall thickness of the inner member 16 is set to 0.3mm to 1.0mm, for example.

The outer member 17 is an elastic member covering the inner member 16. The outer member 17 is formed of a material such as natural rubber, synthetic rubber, thermoplastic elastomer, or the like. The length of the outer member 17 in the extending direction is, for example, about 5m to 50m, for example, 15m, in the extended state. The length of the outer member 17 in the extending direction is, for example, about 2.5m to 25m, for example, 7.5m, in a contracted state. The thickness of the outer member 17 is set to 0.5mm to 2.0mm, for example.

The outer member 17 has a groove portion 17a (partially cut) recessed in the radial direction. The groove portions 17a are formed over the entire circumference of the outer member 17, and a plurality of the groove portions are continuously arranged at a constant interval in the extending direction of the outer member 17. The groove portions 17a are formed at positions corresponding to the valley portions 16b of the inner member 16 opposed in the radial direction. That is, as shown in fig. 2, in a state where the inner member 16 is contracted, the groove portions 17a are opposed to the valley portions 16b in the radial direction. In the example shown in fig. 2, the groove portions 17a correspond to the trough portions 16b one by one, and 1 groove portion 17a is provided corresponding to each trough portion 16 b. The valley portions 16b and the groove portions 17a do not have to correspond to each other, and the number of the groove portions 17a may be about half of the number of the valley portions 16b, for example.

The outer member 17 has: a thin portion 17x in which a groove portion 17a is formed; and a thick portion 17y formed thicker than the thin portion 17x (i.e., not formed with the groove portion 17 a). The outer member 17 is elongated in the extending direction by mainly expanding the thin-walled portion 17x in the extending direction, and is contracted in the extending direction by mainly contracting the thin-walled portion 17x in the extending direction.

The depth (recessed length) of the groove 17a is, for example, about 50% of the thickness of the outer member 17 (more specifically, the thick portion 17y), and is, for example, 0.25mm to 1.0 mm. The width of the groove 17a is, for example, 0.1mm to 1.0 mm. The interval between the groove portions 17a (the interval between adjacent groove portions 17a in the extending direction) is, for example, 1.0mm to 5.0 mm.

(Effect of embodiment 1)

as described above, the hose structure 1 of the present embodiment includes: a cylindrical inner member 16 through which water flows; and an outer member 17 which is an elastic member covering the inner member 16, the inner member 16 being a corrugated hose as follows: the ridge portions 16a and the valley portions 16b are formed so as to be capable of expanding and contracting in the extending direction, and in a state of contracting in the extending direction, the ridge portions 16a and the valley portions 16b protrude in the radial direction and overlap in the extending direction.

in the hose structure 1, the outer member 17 covers the inner member 16, which is, for example, corrugated, and which repeats the mountain portion 16a and the valley portion 16b in a contracted state. Therefore, the inner member 16 through which the water flows does not directly contact the ground or the like, and the durability of the inner member 16 can be improved.

Here, the durability of the hose can be improved by covering the corrugated hose with the outer member, but the outer member may hinder the expansion and contraction of the hose. That is, since the hose that extends and contracts is covered with the outer member, the hose may not be sufficiently extended and contracted by the water pressure.

In this regard, since the outer member 17 covering the inner member 16 of the hose structure 1 of the present embodiment includes an elastic member, the stretchability of the inner member 16 is not impaired even when the outer member 17 covers the hose structure. That is, when the inner member 16 expands and contracts by the water pressure, the outer member 17 as the elastic member can expand and contract in accordance with the inner member 16, and therefore, the outer member 17 can be prevented from interfering with expansion and contraction of the inner member 16. As described above, the hose structure 1 can achieve both the stretchability and the durability of the inner member 16.

The outer member 17 of the hose structure 1 has a groove 17a recessed in the radial direction. Thus, the outer member 17 is formed with a portion (groove portion 17a) having a locally reduced wall thickness. By having the portion with a reduced wall thickness, the stretchability of the outer member 17 in the extending direction is improved. This ensures the stretchability of the inner member 16 covered with the outer member 17, and allows the inner member 16 to be stretched appropriately even in a low water pressure region.

the groove 17a of the hose structure 1 is formed at a position corresponding to the valley portion 16b of the inner member 16. More specifically, in a state where the inner member 16 is contracted, the groove portion 17a is opposed to the valley portion 16b in the radial direction (see fig. 2). The corrugated inner member 16 of the repeated mountain portions 16a and valley portions 16b is provided in the following configuration: the valley portion 16b expands in the radial direction due to the water pressure, so that the inner member 16 elongates in the extending direction. Therefore, the groove portions 17a formed thinly (easily stretchable) are formed at positions corresponding to the valley portions 16b, so that the stretchability of the inner member 16 can be further ensured.

In addition, although the outer member 17 is likely to protrude outward in the radial direction at a position in close contact with the mountain portion 16a of the inner member 16 and mainly comes into contact with the ground or the like, the thin groove portions 17a are formed at positions corresponding to the valley portions 16b where contact with the ground or the like is unlikely to occur, whereby the above-described stretchability can be improved, and the durability can be ensured while suppressing breakage during stretching and shrinking.

[ 2 nd embodiment ]

Next, the hose structure 2 according to embodiment 2 will be described with reference to fig. 3. Note that in the description of the present embodiment, points different from those of embodiment 1 described above will be mainly described.

As shown in fig. 3, the hose portion 20 of the hose structure 2 according to embodiment 2 includes an inner member 26 and an outer member 27. The inner member 26 has, for example, the same structure as that of the inner member 16 according to embodiment 1 described above.

The outer member 27 is formed of the same material, length in the extending direction, and thickness as the outer member 17 described above. The outer member 27 has a groove portion 27a (partially cut out) recessed in the radial direction. The groove portions 27a are formed over the entire circumference of the outer periphery of the outer member 27, and a plurality of the groove portions are arranged at predetermined intervals in the extending direction of the outer member 27. The groove portions 27a are formed at positions corresponding to the valley portions 26b of the inner member 26 opposed in the radial direction.

Here, in the hose portion 10 of embodiment 1, the groove portions 17a are continuously arranged at a constant interval in the extending direction of the outer member 17, but in the hose portion 20, the groove portions 27a are arranged at a non-constant interval in the extending direction of the outer member 27 (see fig. 3). Further, in the hose portion 10 according to embodiment 1, 1 groove portion 17a is provided for each valley portion 16b, but in the hose portion 20, no corresponding groove portion 27a is provided for a part of the valley portion 26b (for example, valley portion 26x shown in fig. 3).

The depth (recessed length) and width of the groove portion 27a are set to be, for example, the same as those of the groove portion 17 a. The adjacent grooves 27a are spaced at intervals of, for example, 5.0mm to 10.0mm, and at intervals of, for example, 1.0mm to 5.0mm, such that wider intervals and narrower intervals are alternately repeated.

As described above, in the hose portion 20 of the hose structure 2, the plurality of groove portions 27a are arranged at intervals which are not constant in the extending direction of the outer member 27, and the corresponding groove portions 27a are not provided for some of the valley portions 26b (for example, valley portions 26x shown in fig. 3). By limiting the formation portion of the groove portion 27a in this manner, it is possible to provide a structure that is more resistant to breakage even when in contact with the ground or the like, and to improve durability. In addition, by defining the formation position of the groove portion 27a, the ease of manufacturing can be improved. Further, by providing the groove portions 27a provided in a limited manner at positions corresponding to the valley portions 26b, stretchability can be secured as in embodiment 1.

[ embodiment 3 ]

Next, the hose structure 3 according to embodiment 3 will be described with reference to fig. 4. Note that in the description of the present embodiment, points different from those of embodiment 1 described above will be mainly described.

As shown in fig. 4, the hose portion 30 of the hose structure 3 according to embodiment 3 includes an inner member 36 and an outer member 37. The inner member 36 has, for example, the same configuration as the inner member 16 of embodiment 1 described above.

The outer member 37 includes an elastic member 38 and an application portion 39. The elastic member 38 has, for example, the same configuration as that of the outer member 17 of embodiment 1 described above, and has a plurality of groove portions 38a continuously arranged at constant intervals in the extending direction. That is, the outer member 37 is formed by adding the coating portion 39 to the outer member 17 (the elastic member 38 in the present embodiment) in embodiment 1.

The coating portion 39 is a member that covers the elastic member 38. The coating portion 39 is formed of a material such as resin, rubber, or metal. The application portion 39 is provided at a position of the elastic member 38 corresponding to the mountain portion 36 a. That is, the coating portion 39 is provided in the region of the elastic member 38 other than the groove portion 38 a.

in this way, the hose portion 30 is provided with the application portion 39 at a position corresponding to the mountain portion 36a of the elastic member 38, which is mainly in contact with the ground or the like. This improves the wear resistance of the outer member 37 to the ground or the like, thereby improving the durability of the hose portion 30.

[ 4 th embodiment ]

Next, the hose structure 4 according to embodiment 4 will be described with reference to fig. 5. Note that in the description of the present embodiment, points different from those of embodiment 1 described above will be mainly described.

As shown in fig. 5, the hose portion 40 of the hose structure 4 according to embodiment 4 includes an inner member 46 and an outer member 47. The inner member 46 has, for example, the same structure as the inner member 16 of embodiment 1 described above.

The outer member 47 is formed of the same material, length in the extending direction, and thickness as the outer member 17 described above. Here, in the hose portion 10 of embodiment 1, the groove portion 17a is formed in the outer member 17, but in the hose portion 40, the groove portion is not formed in the outer member 47.

In the hose portion 40 of the hose structure 4, the outer member 17 covers the corrugated inner member 46. Therefore, the inner member 46 through which the water flows does not directly contact the ground or the like, and the durability of the inner member 46 can be improved. Unlike the hose portion 10 of embodiment 1, the outer member 47 is not formed with a groove portion. Therefore, the wear resistance of the outer member 47 to the ground or the like can be improved, and the durability of the hose portion 40 can be further improved. In addition, in the form in which the groove portion is not formed in the outer member, the outer member 47 is also an elastic member, and thus a structure in which the stretchability of the inner member is not impaired can be realized. Further, since the formation of the groove portion and the like described above are not required, the ease of manufacturing can be improved.

[ modified examples ]

Although the embodiment has been described above as an example, the present disclosure is not limited to the above embodiment. For example, although the case where the inner member has a structure in which so-called mountain folds and valley folds are repeated (a structure in which the repeated cross-section is inverted V-shaped and V-shaped) has been described, the inner member is not limited to this, and may have a structure in which the repeated cross-section is inverted U-shaped and U-shaped. Further, the following configuration may be adopted: the flat portion having no concavity and convexity is sandwiched between the peak portion and the valley portion adjacent to each other, and the peak portion and the valley portion adjacent to each other are discontinuous. In addition, for the inner member, the mountain portions and the valley portions may also be intermingled in the circumferential direction. In addition, the diameter of the corrugated inner member (bellows diameter) may not be constant in the longitudinal direction. Further, although the case where the inner member is a corrugated hose has been described, the inner member is not limited to this, and may be a spiral hose such as a telephone line. In this case, the outer member (outer rubber) may be configured to cover the spiral hose (inner member).

Further, the case where the groove portion formed in the outer member is formed over the entire circumference of the outer periphery of the outer member has been described, but the groove portion is not limited thereto, and may be formed only in a part (for example, a half circumference or the like) of the outer periphery of the outer member.

In addition, although the case where a plurality of groove portions are provided along the extending direction has been described, the present invention is not limited to this, and for example, 1 groove portion may be formed along the extending direction so as to draw a spiral trajectory.

In addition, although the case where the groove portion is formed at a position corresponding to the valley portion of the inner member has been described, the groove portion is not limited to this, and may be formed at a position corresponding to the peak portion of the inner member.

In the embodiment in which the outer member includes the elastic member and the application portion, the case where the application portion is provided in a region other than the groove portion has been described, but the present invention is not limited thereto, and the application portion may be provided in the groove portion.

In addition, in the embodiment in which the outer member includes the elastic member and the application portion, the case where the groove portion is provided in the elastic member has been described, but the following configuration may be adopted: for example, the elastic member is formed in a flat shape without unevenness, and an application portion is provided in a part of the elastic member. In this case, a region of the outer member where the coating portion is not provided (a region of only the elastic member) is thinner than a region where the coating portion is provided, and a groove portion recessed in the radial direction is formed.

Description of the reference numerals

1. 2, 3, 4, a hose structure; 16. 26, 36, 46, inner member; 16a, 36a, mountain portion; 16b, 26b, valley portions; 17. 27, 37, 47, outer member; 17a, 27a, 38a, groove portions; 17x, thin wall portion; 17y, a thick-walled portion; 38. an elastic member; 39. and an application section.