TWI783970B - Hose structure - Google Patents

Abstract

A hose structure includes an inner member that allows water to pass therethrough, and an elastic member that is provided separately from the inner member, extends along the inner member, and is configured to expand and contract in the extending direction of the inner member according to the liquid passing state in the inner member.

Description

hose structure

The present invention relates to a hose structure.

Patent Document 1 discloses a hose that automatically expands in the longitudinal direction and expands in the lateral direction by applying liquid pressure.

[Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2013-249948

Here, in the hose described in Patent Document 1, the liquid-passing portion expands and contracts so that it can be deformed with the liquid. In this kind of hose, if the liquid-passing part expands and contracts repeatedly, the liquid-passing part may be damaged. When the liquid passage part is damaged, the two functions of the liquid passage and the stretchability of the hose will be impaired.

Therefore, an object of the present invention is to provide a hose structure capable of deforming with fluid while suppressing damage to a portion through which fluid passes.

A hose structure according to one aspect of the present invention includes: a flow-through member whose cross-section through which fluid flows is approximately elliptical; Furthermore, it is configured to expand and contract in the extending direction of the flow passage member according to the flow passage state in the flow passage member.

In the hose structure according to one aspect of the present invention, the telescopic member which is a different member from the flow-through member is configured to expand and contract in the direction in which the flow-through member extends according to the state of flow in the flow-through member. Since the telescopic member extends along the flow-through member, the flow-through member can deform as the telescopic member expands and contracts. With this structure, in the hose structure, it is divided into a part for flow (flow member) and a telescoping part (telescopic member), and the part for flow can be deformed (for example, it can be stored in a simple and compact shape) state) without stretching the portion for flow. In this way, it is possible to create a structure in which damage to the flow-through portion, which is a problem mainly when the flow-through portion expands and contracts, does not easily occur. According to the above structure, according to the hose structure of one aspect of the present invention, it is possible to provide a structure capable of deforming with the fluid while suppressing damage to the portion through which the flow passes.

Furthermore, in the hose structure of one aspect of the present invention, the flow passage member is formed to have a substantially elliptical cross-section. In the state where the fluid flows through the flow passage member, the telescopic member will expand, and the flow passage member will be fully extended in accordance with this state. On the other hand, in a state where no fluid flows through the flow passage member, the telescopic member contracts, and the flow passage member becomes, for example, contracted and folded in a helical state following this state. According to the hose structure of the present invention, in the case where the flow passage member is formed to have a substantially elliptical cross section, the hose of the present invention is more effective than the case where the flow passage member of a common hose is formed in a true circle shape in cross section, for example. In the case of shrinking into a helical shape, etc., it is easier to unify the bending direction when folding in a predetermined direction. Due to this feature, when the telescopic member shrinks, it is easy to shrink smoothly into a helical shape, so that the flow-through member can properly discharge the water accumulated in the flow-through member by virtue of the force of shrinking into a helical shape. As mentioned above, according to the hose structure of one aspect of the present invention, drainage performance can be improved.

In the flow-through member, the thickness of the long-axis portions facing each other in the long-axis direction of the cross-section may be thicker than the thickness of the short-axis portions facing each other in the short-axis direction. By thickening the long-axis part and thinning the short-axis part, the easy-to-deform part (short-axis part) of the passage member will be determined, so the bending direction when shrinking into a helical shape is easier to unify, and the folding can be performed more smoothly. Moreover, since the long-axis part is thickened and hardened, it becomes a part that is not easily deformed. As a result, this part can be used as a water-passing area, and the drainage effect (drainage) during folding is improved, and the water-permeability at the initial stage of water-passing can be improved. . Furthermore, by making the short-axis part thinner, it becomes a structure that is easy to stretch even under low water pressure, and at the same time, by thickening the long-axis part, it is possible to suppress the flow-through member from being too large due to stretching or expansion beyond the necessary level. The load acts on the flow-through member and the member (external member) covering the flow-through member.

In the flow passage member, the short-axis portions facing each other in the short-axis direction may be deformed in a direction approaching each other. By deforming the opposite parts in the direction of the short axis toward the central direction, it is possible to determine the easily deformable part (short axis part) of the flow-through member, so that the bending direction when shrinking into a helical shape is easier to unify, and can be smoother. to fold. Furthermore, the portion that is not easily deformed (long axis portion) is determined by unifying the bending direction, so that this portion can be used as a water passage area to improve the drainage effect (drainage) during folding, and at the same time make the initial water passage Water permeability is improved.

The flow-through member can also be provided with a reinforcement member on the opposite long-axis part of the cross-section in the long-axis direction. By arranging the reinforcement member on the long axis part, the easily deformed part (short axis part) of the flow-through member is determined, so that the bending direction when shrinking into a helical shape is easier to unify, and the folding can be performed more smoothly. Furthermore, the long-axis part is not easily deformed, so that this part can be used as a water-passing area to improve the drainage effect (drainage) during folding, and at the same time, the water-permeability at the initial stage of water-passing is improved. Furthermore, by providing the reinforcing member on the major axis portion, it is possible to prevent excessive load from acting on the flow passage member and the member (external member) covering the flow passage member due to the flow passage member stretching or expanding more than necessary.

According to the present invention, it is possible to provide a hose structure capable of deforming with the fluid while suppressing damage to the portion through which the fluid passes.

1, 2, 3, 4, 4X, 5, 6, 7‧‧‧hose structure

10, 20, 30, 40, 40X, 50, 60, 70‧‧‧hose part

11‧‧‧Liquid source connector

12‧‧‧Nozzle connector

13‧‧‧Nozzle part

14‧‧‧pressure handle

15‧‧‧water head

16, 26, 76, 86, 96, 106, 116‧‧‧Internal components (flow components)

17, 27, 77‧‧‧External components

18, 28, 33, 52, 62, 78‧‧‧Elastomer

21‧‧‧Water supply organization

22‧‧‧Telescopic mechanism

29‧‧‧Covered components

31, 51‧‧‧main hose

32‧‧‧Expandable hose

41‧‧‧Return valve

41X‧‧‧Pressure control valve (pressure reducing valve)

42‧‧‧Discharge valve

99, 109, 119‧‧‧reinforcing member

Lp‧‧‧long axis part

Sp‧‧‧Short axis part

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

Fig. 2 is an explanatory diagram showing deformation of the elastic body as it expands and contracts. Fig. 2 (a) shows a hose structure in a non-water-passing state, and Fig. 2 (b) shows a hose structure in a water-passing state.

Fig. 3 is an explanatory diagram of the deformation of the hose structure in the second embodiment as the elastic body expands and contracts. Fig. 3 (a) shows the hose structure in a non-water-through state, and Fig. 3 (b) shows A hose structure in a water-passing state.

Fig. 4 is an explanatory diagram of the deformation of the hose structure of the third embodiment as the elastic body expands and contracts. Fig. 4 (a) shows the hose structure in a non-water-through state, and Fig. 4 (b) shows The hose structure at the start of water flow, and Fig. 4 (c) shows the hose structure after a period of time has elapsed since the start of water flow.

Fig. 5 is an explanatory diagram of the deformation of the hose structure of the fourth embodiment as the elastic body expands and contracts. Fig. 5 (a) shows the hose structure in a non-water-passing state, and Fig. 5 (b) is the beginning The hose structure at the time of water passing, Fig. 5 (c) is the hose structure after a period of time from the start of water passing.

Fig. 6 is a schematic diagram of another hose structure in the fourth embodiment.

Fig. 7 is an explanatory diagram of the deformation of the hose structure of the fifth embodiment as the elastic body expands and contracts. Fig. 7 (a) shows the hose structure in a non-water-through state, and Fig. 7 (b) is A hose structure in a water-passing state.

Fig. 8 is an explanatory diagram of the deformation of the hose structure of the sixth embodiment as the elastic body expands and contracts. Fig. 8 (a) shows the hose structure in a non-water-passing state, and Fig. 8 (b) is A hose structure in a water-passing state.

Fig. 9 is an explanatory diagram of a hose structure according to a seventh embodiment.

Fig. 10 is a cross-sectional view of internal components included in the hose structure shown in Fig. 9 .

Fig. 11 is a cross-sectional view of internal members included in the hose structure according to the eighth embodiment.

Fig. 12 is a cross-sectional view of internal components included in the hose structure of the ninth embodiment.

[First Embodiment]

Hereinafter, the first embodiment will be described in detail with reference to the drawings. In the explanatory text, the same elements or elements with the same function are marked with the same symbols, and repeated descriptions are omitted.

(hose structure)

As shown in FIG. 1 , the hose structure 1 includes a hose portion 10 , a liquid source connector 11 , a nozzle connector 12 , and a nozzle portion 13 . The hose structure 1 is configured to be portable and transportable, and has a function of supplying liquid (fluid) such as water from a supply source (liquid source) outdoors or indoors. In addition, in the present embodiment, the hose structure 1 for supplying fluid is described as an example of supplying liquid, but gas may also be supplied.

The hose part 10 is a long strip hollow tube for transporting the liquid supplied from the liquid source. The hose portion 10 conveys liquid such as water. In this embodiment, although the hose part 10 is demonstrated as the pipe which conveys water, it is not limited to this, For example, other liquids can also be conveyed. Although the hose part 10 is described as being connected to a water supply device (such as a water tap) as a liquid source via the liquid source connector 11, it is not limited thereto, and may be connected not only through the liquid source connector 11 but also through other hoses. etc. are indirectly connected to the water supply equipment. In the water-passing state (the state in which water is flowing), the hose part 10 is fully stretched by the water pressure, and in the non-water-passing state (the state in which water is not flowing), the hose part 10 is folded due to the release of the water pressure. state (the state shown in Figure 1). Details about the hose unit 10 will be described later.

The liquid source connector 11 is a connector for connecting water supply equipment and the hose unit 10 . The liquid source connector 11 is connected to the base end side of the hose part 10 . That is, the liquid source connector 11 is an inflow port through which water is sent from the water supply equipment to the hose part 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 front end side of the hose part 10 . That is, the nozzle connector 12 is an outflow port through which water is sent from the hose part 10 to the nozzle part 13 .

The nozzle part 13 is a sprinkling nozzle for spraying the water sent from the water supply equipment to the water supply target via the hose part 10 . The nozzle part 13 has a pressure handle 14 and a water outlet head 15 . The nozzle part 13 sprays water from the water spout 15 when the user grasps (presses) the pressure handle 14 .

(Detailed configuration of the hose part)

Next, details about the hose portion 10 will be described with reference to FIG. 2 . The hose part 10 is equipped with the inner member 16 (flow-through member), the outer member 17, and the elastic body 18 (extensible member). The base ends of the inner member 16 , the outer member 17 and the elastic body 18 are all connected to the liquid source connector 11 , and the ends are connected to the nozzle connector 12 .

The internal member 16 and the external member 17 are in the shape of repeatedly forming convex folds and concave folds in the sectional plane cut along the longitudinal direction thereof, in other words, they are bellows members (see Fig. 2(a)) . In the water-passing state, the heights of the above-mentioned convex folds and concave folds of the inner member 16 and the outer member 17 decrease and apparently extend in the longitudinal direction (see FIG. 2( b )). In the non-water-permeable state, the height of the convex folds and the concave folds becomes high, and apparently shrinks in the longitudinal direction (see Fig. 2 (a)). When the water-passing state is set to the non-water-passing state, although the inner member 16 and the outer member 17 themselves have a contraction force to some extent, only the long side of the hose part 10 can be made to shrink in terms of the contraction force. The direction length decreases slightly. Therefore, the elastic body 18 is provided in the hose part 10, and it is comprised so that the length of the longitudinal direction may be shortened by the contraction force of this elastic body 18 when it changes from a water-passing state to a non-water-passing state.

That is to say, by the presence of the elastic body 18, the hose part 10 can be contracted to a predetermined length (initial length A in the non-water state) in the non-water flow state, and in the case of no contraction function of the elastic body 18, The hose portion 10 cannot be contracted to the initial length A of the non-water-passing state. When the length of the hose part 10 is the imaginary length B of the non-water flow state in the non-water flow state without the contraction function of the elastic body 18, A/B is set at about 0.3 to 0.5, for example. When A/B is smaller than this value, the burden on the elastic body 18 in the stretched state is large, and the stretchability of the elastic body 18 tends to decrease. When A/B is larger than this value, the contraction function of the hose part 10 deteriorates, and the elasticity of the inner member 16 and the outer member 17 becomes large, which tends to cause cracks due to repeated use. Based on these factors, A/B may be around 0.4, for example.

When the length of the hose part 10 in the non-water-passing state (the water flowing from the inside to the outside only reaches the shrinkage of the hose) is set to L1, and the liquid is passed through at a predetermined water pressure (for example, 0.15Mpa to 0.4Mpa). In the case where the length of is set to L2, L1/L2 is set at 0.3 to 0.7. If L1/L2 is smaller than this value, each member will easily deteriorate due to repeated use. Therefore, L1/L2 may be 0.4 or more, and may even be 0.45 or more. In addition, when L1/L2 is larger than this value, it will become hard to shorten (shrink hard). Therefore, L1/L2 may be 0.6 or less, and may even be 0.55 or less.

7mm至

15mm的範圍，例如

12mm至

13.5mm。 The internal member 16 is a water passage through which water flows. The inner member 16 itself may be constructed of a stretchable material or a non-stretchable material. The internal member 16 is made of materials such as polyvinyl chloride, silicon, elastomer, polyurethane, and fluororesin. The extension direction length of the internal member 16 is set in the range of, for example, 5 m to 50 m, for example, 15 m. The inner diameter (the inner diameter when passing water) of the internal member 16 is set at, for example,

7mm to

15mm range, e.g.

12mm to

13.5mm.

0mm至

2mm左右。 The outer member 17 is a member that covers the inner member 16 . The exterior member 17 itself may be constructed using a stretchable material or a non-stretchable material. The exterior member 17 is made of materials such as copolyester and nylon. The extension direction length of the outer member 17 is set in the range of, for example, 5 m to 50 m, for example, 15 m. The inner diameter of the outer member 17 (the inner diameter when passing water) can be enlarged, for example, to be larger than the inner diameter of the inner member

0mm to

About 2mm.

The elastic body 18 is a rope-shaped elastic member that extends along the inner member 16 and is configured to expand and contract in the direction in which the inner member 16 extends (longitudinal direction) according to the liquid-permeable state in the inner member 16 . The elastic body 18 is provided as a member different from the inner member 16 and the outer member 17 . The elastic body 18 is disposed between the inner member 16 and the outer member 17 (between the radial direction). That is, the elastic body 18 is disposed on the outer side of the inner member 16 and on the inner side of the outer member 17 . Furthermore, the elastic body 18 is arranged in a biased state in a predetermined region in the circumferential direction of the inner member 16 (see (a) and (b) of FIG. 2 ).

In a state where water flows through the inner member 16 (water passing state), the elastic body 18 is stretched in the extending direction of the inner member 16 (see FIG. 2( b )) by water pressure. Furthermore, in the state where water does not flow through the internal member 16 (non-water flow state), the elastic body 18 returns to its original length (shrinkage) due to the removal of water pressure (see FIG. 2( a )). The so-called "stretching" and "contraction" of the elastic body 18 refer to the fact that the elastic body 18 expands and contracts in the direction of extension, so that the length in the direction of extension changes. Furthermore, the apparent lengths of the inner member 16 and the outer member 17 also change when the elastic body 18 expands and contracts in the extending direction. That is, as shown in FIG. 2( b ), in the water passing state, the inner member 16 and the outer member 17 will be in a fully extended state as the elastic body 18 extends in the extending direction. On the other hand, as shown in Fig. 2 (a) and Fig. 1, in the non-water-permeable state, as the elastic body 18 shrinks in the direction of extension (returns to the original length), the inner member 16 and the outer member 17 will shrink It becomes, for example, a helical shape, and becomes a folded state.

The elastic body 18 is made of materials such as natural rubber, nitrile rubber, ethylene-propylene rubber, silicone rubber, and fluororubber. The length in the extending direction of the elastic body 18 is set at 50% to 80% of the state stretched by water pressure in a general state (shrink state), for example, 7.5m to 12m.

In order to expand the degree of shortening of the length of the hose part 10, the elastic body 18 can be linear (but can be bent by the bending of the hose part 10 itself) in the non-water-through state, and can also be bent in the non-water-through state. Can be helical. In addition, in order to take into account both the expansion of the contraction force and the reduction of the cross-sectional area, the elastic body 18 is a solid elastic member. In addition, the elastic body 18 may also be a hollow elastic member.

(Functional effects of the first embodiment)

As mentioned above, the hose structure 1 of this embodiment is provided with: the internal member 16, the water supply flow; and the elastic body 18, which is set as a different member from the internal member 16, and extends along the internal member 16 at the same time, and is configured to be able to The inner member 16 expands and contracts in the direction in which the inner member 16 extends according to the liquid-through state in the inner member 16 .

In such a hose structure 1 , the elastic body 18 , which is a member different from the inner member 16 , can expand and contract in the direction in which the inner member 16 extends in accordance with the liquid-through state of the inner member 16 . Since the elastic body 18 extends along the inner member 16, the inner member 16 deforms as the elastic body 18 expands and contracts. With this configuration, in the hose structure 1, the liquid-passing part (internal member 16) is separated from the stretchable part (elastic body 18), so that the liquid-passing part can be deformed (for example, stored in a simple and compact form), and There is no need to expand and contract the liquid-through portion. Through this design, the structure obtained can make it difficult for the damage of the liquid supply part which will cause a problem mainly when the liquid passage part expands and contracts. As described above, according to the hose structure 1, it is possible to provide a structure capable of deforming with liquid while suppressing damage to the portion through which the liquid passes.

The hose structure 1 further includes an outer member 17 covering the inner member 16 , and the elastic body 18 is provided as a separate member from the inner member 16 and the outer member 17 . With this structure, the inner member 16, which is the part through which the liquid is supplied, can be covered with the outer member 17, and the inner member 16 can be made more difficult to break, and the inner member 16 and the outer member 17 can be formed as different members. The elastic body 18 properly deforms the inner member 16 and the outer member 17 .

The elastic body 18 is disposed between the inner member 16 and the outer member 17 . With this structure, the influence of expansion and contraction of the elastic body 18 can be effectively applied to both the inner member 16 and the outer member 17, so that the inner member 16 and the outer member 17 can be deformed more appropriately. Furthermore, since the elastic body 18 can be formed so that it does not come into contact with the water flowing through the inner member 16, deterioration of the elastic body 18 due to contact with water can be suppressed.

The elastic body 18 is biased and disposed in a predetermined area in the circumferential direction of the inner member 16 . If the elastic body is arranged in various regions in the circumferential direction of the inner member, the elastic body and the inner member tend to become entangled when the elastic body expands and contracts, which may cause problems such as difficulty in deformation of the inner member and deterioration of the liquid permeability of the inner member. In this regard, since the elastic body 18 is biased in a predetermined region in the circumferential direction of the inner member 16 , the inner member 16 becomes easily deformable, and at the same time, the liquid permeability of the inner member 16 can be ensured.

In addition, since the inner member 16 is folded by the elastic body 18 belonging to the separate body, the stretch rate of the hose can be easily adjusted by adjusting the length of the elastic body 18 .

[Second Embodiment]

Next, a hose structure 2 according to a second embodiment will be described with reference to FIG. 3 . In addition, in the description of this embodiment, the part which differs from the said 1st Embodiment is mainly demonstrated.

As shown in Figure 3 (a) and Figure 3 (b), the hose part 20 of the hose structure 2 of the second embodiment is equipped with: a water passage mechanism 21 related to water passage; Relevant telescopic mechanism 22.

The water passage mechanism 21 includes an inner member 26 and an outer member 27 . The configuration of the inner member 26 is the same as that of the inner member 16 of the first embodiment, and the configuration of the outer member 27 is the same as that of the outer member 17 of the first embodiment. That is, the inner member 26 is a water channel for water supply, and the outer member 27 is a member that covers the inner member 16 .

The telescopic mechanism 22 is provided along the extending direction of the water passage mechanism 21 (specifically, the outer member 27). The telescopic mechanism 22 includes an elastic body 28 and a covering member 29 . The elastic body 28 is made of the same material as the elastic body 18 of the first embodiment, and is arranged on the outer side of the outer member 27 . The elastic body 28 extends toward the extending direction of the inner member 26 and the outer member 27 . The covering member 29 is a member that covers the elastic body 28 disposed outside the outer member 27 , and extends in the extending direction of the inner member 26 and the outer member 27 . The covering member 29 is provided so as to be connected to the outer member 27 at a predetermined area in the circumferential direction of the outer member 27 . The covering member 29 is made of, for example, the same material as the outer member 27 such as copolyester or nylon.

In this way, the hose part 20 of the hose structure 2 of the second embodiment is set as the area (chamber) of the water passage mechanism 21 separated by the external member 27 and the telescopic mechanism 22 separated by the covering member 29. The structure of two rooms such as the area (room). And, as shown in Figure 3 (b), in the water passing state, as the elastic body 28 of the telescopic mechanism 22 stretches toward the extension direction, the covering member 29 of the telescopic mechanism 22 and the inner member 26 and the outside of the water passing mechanism 21 Member 27 will reach a fully extended state. On the other hand, as shown in Fig. 3 (a), in the non-water-permeable state, as the elastic body 28 shrinks toward the extending direction (returns to the original length), the covering member 29, the inner member 26 and the outer member 27 will It is contracted into, for example, a helical shape, and becomes a folded state.

As described above, in the hose structure 2 according to the second embodiment, the elastic body 28 is arranged on the outer side of the outer member 27 . For example, when the inner member is close to the elastic body, when water flows toward the inner member, the inner member and the stretchable elastic body may become entangled. In this case, problems such as difficulty in deformation of the internal member and deterioration of water permeability of the internal member may occur. For this point, by disposing the elastic body 28 on the outside of the outer member 27, it is possible to effectively suppress the intertwining of the inner member 26 and the elastic body 28 when passing through water, so that the inner member 26 becomes a structure that is easily deformed. The water permeability of the internal member 26 is ensured.

Further, the hose structure 2 includes a covering member 29 covering the elastic body 28 arranged outside the outer member 27 . In this way, the area (chamber) of the water passage mechanism 21 related to water passage formed by the inner member 26 and the outer member 27 and the telescopic mechanism 22 related to the expansion and contraction formed by the elastic body 28 and the covering member 29 can be connected. The area (chamber) is separated, which can effectively restrain the impact of the expansion and contraction of the elastic body 28 on the inner member 26 and the outer member 27 for water passage.

[third embodiment]

Next, a hose structure 3 according to a third embodiment will be described with reference to FIG. 4 . In addition, in the description of this embodiment, the part which differs from the said 1st and 2nd embodiment is mainly demonstrated.

As shown in FIGS. 4( a ) to ( c ), the hose portion 30 of the hose structure 3 according to the third embodiment includes a main hose 31 , an expansion hose 32 , and an elastic body 33 . The base ends of the main hose 31 , the flexible hose 32 and the elastic body 33 are all connected to the liquid source connector 11 , and the ends are connected to the nozzle connector 12 .

The main hose 31 is a bellows-shaped hose that can expand and contract in the water supply direction. The main hose 31 is made of materials such as polyester, nylon, polyvinyl chloride, soft polyvinyl chloride, soft polypropylene, soft polyethylene, ethylene/vinyl acetate copolymer, or the woven fabric of polyester or nylon is coated Made of resin. The main hose 31 has a cylindrical structure, and is a structure in which so-called convex folds and concave folds are repeated. With this structure, the main hose 31 can expand and contract in the extending direction, and also form a closed space whose volume can be changed. The length of the extension direction of the main hose 31 is usually set in the range of 5 m to 50 m, for example, 7.5 m (contracted state). In addition, the length in the extending direction of the main hose 31 is, for example, 2 to 3 times that of the contracted state, eg, 15 m, in a state expanded by water pressure.

The telescopic hose 32 passes through the main hose 31 and is configured as a bellows-shaped hose that can expand and contract in the water supply direction. The telescopic hose 32 is made of materials such as polyester, nylon, polyvinyl chloride, soft polyvinyl chloride, soft polypropylene, soft polyethylene, ethylene/vinyl acetate copolymer, or coated with polyester or nylon woven cloth. Made of resin. The telescopic hose 32 has a cylindrical structure, and is provided in a structure in which so-called convex folds and concave folds are repeated. With this structure, the telescopic hose 32 can expand and contract in the extending direction, and form a closed space whose volume can be changed. The telescopic hose 32 is connected to the front end portion of the nozzle connector 12 to be closed. The extension direction length of the telescopic hose 32 is set in a range of, for example, 5 m to 50 m, for example, 7.5 m in a normal period (contracted state). In addition, the length in the extending direction of the main hose 31 is, for example, 2 to 3 times that of the contracted state, eg, 15 m, in the state expanded by hydraulic pressure.

The elastic body 33 is an elastic member passing through the inner side of the flexible hose 32 . The elastic body 33 is made of, for example, the same material as the elastic body 18 in the first embodiment.

In the hose part 30 of the hose structure 3 of the third embodiment, in the non-water-through state, as shown in Fig. 4 (a), the elastic body 33 is in an unstretched state, and the main hose 31 stretches The hose 32 is in a contracted state. As shown in Figure 4 (b), from this state, water flows from the liquid source connector 11 to the inner side of the main hose 31 and is the outer area of the flexible hose 32 to become a water-through state, the elastic body 33 can be as follows: As shown in Fig. 4 (c), the main hose 31 and the telescopic hose 32 are fully stretched along with the hydraulic pressure to stretch in the direction of extension. Then, when the water supply is stopped and the water flow is stopped, the main hose 31 and the telescopic hose 32 are again contracted as shown in FIG. 4( a ).

In such a hose portion 30 , since the elastic body 33 expands and contracts basically only in the longitudinal direction (expansion and contraction direction), frictional resistance against the expansion and contraction hose 32 is small. With this feature, even when the elastic body 33 expands and contracts repeatedly, damage or the like is less likely to occur, and a high-durability configuration can be realized.

In addition, since the elastic body 33 passes through the inner side of the telescopic hose 32, and the water flows outside the telescopic hose 32 (the elastic body 33 is not a water-passing member), even when the elastic body 33 wears out, the hose will Part 30 will not leak or break.

Furthermore, since the elastic body 33 is not a water passage member, the main expansion and contraction structure in the hose (the elastic body 33 in the hose portion 30 ) can be formed thinner. With this feature, the stretching of the elastic body 33 is relatively easy, and the water pressure for stretching and contracting the elastic body 33 can be set to be low. That is, the usable water pressure range is expanded.

[Fourth Embodiment]

Next, a hose structure 4 according to a fourth embodiment will be described with reference to FIG. 5 . In addition, in the description of this embodiment, the part which differs from the said 1st - 3rd embodiment is mainly demonstrated.

The hose portion 40 of the hose structure 4 of the fourth embodiment shown in Fig. 5 (a) to (c) is basically composed of the hose portion 30 of the hose structure 3 of the third embodiment. Similarly, a main hose 31 , an expansion hose 32 and an elastic body 33 are provided. In addition to these configurations, the hose portion 40 is provided with a check valve 41 and a discharge valve 42 on the base end side (the liquid source connector 11 side).

The check valve 41 is a valve element for suppressing contraction of the telescoping hose 32 even in a state where the pressure in the flow path is lowered after the water flow is completed (see FIG. 5( c )). That is, the check valve 41 limits the pressure applied to the telescopic hose 32 . In addition, by controlling the discharge valve 42, the expansion and contraction hose 32 can be retracted and accommodated arbitrarily. In addition, the discharge valve 42 may be provided on the nozzle connector 12 side. With such a configuration, the pressure load acting on the expansion hose 32 can be reduced, and durability can be improved.

In addition, instead of the hose part 40 of the above-mentioned hose structure 4, the hose part 40X of the hose structure 4X shown in FIG. 6 may be used. The basic structure of the hose part 40X is the same as that of the above-mentioned hose part 40, and it is provided with the pressure control valve 41X (pressure reducing valve) instead of the check valve 41 and the discharge valve 42. The pressure control valve 41X is provided at the liquid source connector 11 as one of the primary sides of the hose part 40X to control the pressure applied to the flexible hose 32 . With this configuration, the pressure load acting on the expansion hose 32 can be reduced, and the durability can be improved.

[Fifth Embodiment]

Next, a hose structure 5 according to a fifth embodiment will be described with reference to FIG. 7 . In addition, in the description of this embodiment, the part which differs from the said 1st - 4th embodiment is mainly demonstrated.

As shown in FIG. 7(a) and FIG. 7(b), the hose portion 50 of the hose structure 5 according to the fifth embodiment includes a main hose 51 and an elastic body 52 . Both the base ends of the main hose 51 and the elastic body 52 are connected to the liquid source connector 11 , and the front ends are connected to the nozzle connector 12 .

The main hose 51 is a bellows-shaped hose that can expand and contract in the water supply direction. The main hose 51 is made of the same material as, for example, the main hose 31 of the third embodiment.

The elastic body 52 is an elastic member passing through the inner side of the main hose 51 . The elastic body 52 is made of, for example, the same material as the elastic body 33 of the third embodiment.

In the hose part 50 of the hose structure 5 of the fifth embodiment, in the non-water-passing state, as shown in Fig. 7 (a), the elastic body 52 is in an unstretched state, and the main hose 51 and the elastic body 52 is the contraction state. From this state, when water flows from the liquid source connector 11 to the area inside the main hose 51 and outside the elastic body 52 to become a water-through state, as shown in Fig. 7 (b), it can be activated by water pressure. The elastic body 52 expands in the extending direction, and with this state, the main hose 51 is fully extended. Then, when the water supply is stopped to become the non-water flow state, the main hose 51 becomes the contracted state as shown in Fig. 7 (a) again.

In such a hose part 50, when stretched in the extending direction in a water-passing state, since the thickness of the elastic body 52 is thin, the water-passing area (the area located inside the main hose 51 and outside the elastic body 52) is wide. Efficient watering is possible. Furthermore, when shrinking in the non-water-passing state, since the thickness of the elastic body 52 is thicker, the water-passing area is narrower, so the stagnant water in the hose part 50 can be efficiently discharged.

In addition, based on the same reason as the hose part 30 of the third embodiment, it is possible to achieve a structure in which the elastic body 52 is not easily damaged, a structure in which the hose part 50 is not easily leaked even if the elastic body 52 is worn, and can be used A structure with a wide range of water pressures.

[Sixth Embodiment]

Next, a hose structure 6 according to a sixth embodiment will be described with reference to FIG. 8 . In addition, in the description of this embodiment, the part which differs from the said 1st - 5th embodiment is mainly demonstrated.

In the hose part 60 of the hose structure 6 of the sixth embodiment shown in Fig. 8 (a) and (b), its basic structure is the same as that of the hose part 50 of the hose structure 5 of the fifth embodiment. same. The hose portion 60 includes an elastic body 62 instead of the elastic body 52 of the hose portion 50 .

The elastic body 62 is made of the same material as the elastic body 52 of the fifth embodiment, but its arrangement is different from that of the elastic body 52 . That is, the elastic body 62 is arranged in a biased state in a predetermined region (lower part in FIG. 8 ) in the circumferential direction of the main hose 51 .

In the configuration in which the hose is expanded and contracted by water pressure, if the friction between the hose and elastic bodies such as rubber tubes is large, the hose is difficult to expand and contract, and there is a problem that the usable water pressure increases. Regarding this point, in the hose part 60, because the elastic body 62 is arranged in a predetermined area (the lower part in Fig. 8 ) in the circumferential direction of the main hose 51 in a biased state, the main hose 51 and the elastic body can be 62 is limited to reduce the friction between the main hose 51 and the elastic body 62 . With this configuration, the usable water pressure range is expanded.

[Seventh Embodiment]

Next, a hose structure 7 according to a seventh embodiment will be described with reference to FIGS. 9 and 10 . In addition, in the description of this embodiment, the part which differs from the said 1st - 6th embodiment is mainly demonstrated.

As shown in Fig. 9, the hose part 70 of the hose structure 7 according to the seventh embodiment includes an inner member 76 (flow-through member), an outer member 77, and an elastic body 78 (extensible member). The inner member 76, the outer member 77 and the elastic body 78 are all connected to the liquid source connector at the base end (not shown in Figure 9, please refer to "liquid source connector 11" in Figure 1), and the front end is connected to the tube Nozzle connector (not shown in Figure 9, please refer to "Nozzle Connector 12" in Figure 1). The exterior member 77 has the same configuration as, for example, the exterior member 17 of the first embodiment. In addition, the elastic body 78 is made into the same structure as the elastic body 18 of 1st Embodiment, for example. Hereinafter, the detailed configuration of the internal member 76 will be described with reference to FIG. 10 .

The internal member 76 is a water passage through which water flows. The material and the length in the extending direction of the inner member 76 are, for example, the same as those of the inner member 16 of the first embodiment. As shown in FIG. 10 , the cross section of the inner member 76 perpendicular to the axis of the inner member 76 is substantially elliptical. The term "approximately elliptical" means not only a complete ellipse, but also a shape that looks closer to an ellipse than a true circle. The length (longer diameter) of the major axis La of the inner member 76 is set to about 2 to 3 times the length (short diameter) of the minor axis Sa of the inner member 76, for example. The length of the short axis Sa is set in the range of, for example, 5 mm to 8 mm, and the length of the long axis La is set to correspond to the ratio of the above-mentioned short axis Sa.

In the cross section shown in FIG. 10, the wall thickness t1 (thickness) of the major axis portion Lp of the inner member 76 facing in the direction of the major axis La of the substantially elliptical shape is smaller than the wall thickness t1 (thickness) of the minor axis portion Sp facing in the direction of the minor axis Sa. The wall thickness t2 (thickness) is thicker. The inner member 76 is formed such that the wall thickness gradually increases from the short-axis portion Sp toward the long-axis portion Lp. In order to create a hardness difference in the inner member 76 so that the inner member 76 clearly has a portion (short axis portion Sp) that is easily deformed, it is preferable to form the wall thickness t1 to be sufficiently thicker than the wall thickness t2, for example, to form the wall thickness t1 as a wall The thickness t2 is at least 1.2 times, more preferably at least 1.3 times. On the other hand, if the thickness t1 of the long-axis portion Lp is too thick, the hose portion 70 itself loses its softness, deteriorating the usability of the hose portion 70 . From this point of view, the thickness t1 is preferably, for example, 2 times or less, more preferably 1.5 times or less, the wall thickness t2. The wall thickness t2 of the short-axis portion Sp is preferably 0.3 mm or more from the viewpoint of easily expanding the internal member 76 due to water pressure; and the wall thickness t2 is preferably 0.6 mm from the viewpoint of preventing damage due to water pressure. As mentioned above, in particular, the wall thickness t2 is preferably 1.0 mm or more from the viewpoint of affecting stretch-drag durability due to repeated use. On the other hand, the wall thickness t2 is preferably 1.5 mm or less from the viewpoint of preventing the internal member 76 from easily expanding due to water pressure, and the wall thickness t2 is preferably 1.2 mm or less from the viewpoint of usability even at low water pressure. . The wall thickness t1 of the long-axis portion Lp is set at a thickness corresponding to the ratio of the above-mentioned wall thickness t2.

Furthermore, in the cross section shown in FIG. 10, the minor axis portions Sp and Sp of the internal member 76 facing each other in the direction of the minor axis Sa are dented and deformed toward each other (in the direction of the center of the substantially ellipse), and the cross section is formed as follows: It is glasses type. The amount of deformation (amount of depression on one side) of the short-axis portion Sp is, for example, about 0% to 20% of the distance between the short-axis portions Sp and Sp in an undeformed state. That is, for example, if the distance between the short-axis parts Sp and Sp in the undeformed state is 7 mm, the deformation amount (the amount of depression on one side) of the short-axis part Sp is about 0 mm to 1.4 mm.

As described above, the hose structure 7 according to the seventh embodiment includes the internal member 76 having a substantially elliptical cross section. In such a hose structure 7 , the elastic body 78 stretches when the liquid flows through the inner member 76 , and the inner member 76 becomes a fully stretched state in accordance with this state. On the other hand, in a state where the liquid does not flow in the inner member 76, the elastic body 78 shrinks, and the inner member 76 becomes a state of shrinking and folding into a spiral shape in accordance with this state. According to the form of the hose structure 7, when the inner member 76 is formed in a substantially elliptical cross-section, when contracted into a helical shape, the inner member 76 shrinks toward the It is easier to unify the bending direction when folding in a predetermined direction. Thereby, when the elastic body 78 shrinks, the inner member 76 can be easily and smoothly shrunk into a helical shape, and the water retained in the inner member 76 can be properly discharged by the force of the helical contraction. As described above, according to the hose structure 7, drainage performance can be improved.

Furthermore, in the cross section of the internal member 76, the thickness t1 of the major axis portion Lp facing the major axis La direction is thicker than the thickness t2 of the minor axis portion Sp facing the minor axis Sa direction. Since the long-axis portion Lp is thicker and the short-axis portion Sp is thinner, it can be determined that the easily deformed portion (short-axis portion Sp) of the internal member 76 can be easily uniformed in the bending direction when shrinking into a helical shape, so it can be smoother. to fold. Furthermore, the thick, hard and hard-to-deform part of the long-axis portion Lp can be used as a water-passing area, so the drainage function (drainage) during folding can be improved, and the water-permeability at the initial stage of water-passing can be improved. In addition, by thinning the thickness of the short-axis portion Sp, a structure that is easy to stretch even at low water pressure is formed, and at the same time, by thickening the thickness of the long-axis portion Lp, it is possible to suppress the passage member from stretching or expanding beyond the necessary level to cause A case where too much load acts on the inner member 76 and the member covering the inner member 76 (the outer member 77 ).

Furthermore, the minor-axis portions Sp, Sp, which face each other in the direction of the minor axis Sa, are deformed in a direction approaching each other, so that the inner member 76 is formed into a spectacle-shaped cross section. By deforming the portion facing the central direction in the direction of the short axis Sa, the easily deformable portion (short axis portion Sp) of the internal member 76 can be more clearly determined, so that the bending direction when shrinking into a helical shape is more easily unified, and to fold more smoothly. In addition, by unifying the bending direction, it is possible to determine the part that is not easily deformed (the long-axis part Lp), so that this part can be guaranteed as a water passage area, so that the drainage effect (drainage) during folding can be improved, and water passage can be improved at the same time. Initial water permeability.

[Eighth Embodiment]

Next, a hose structure according to an eighth embodiment will be described with reference to FIG. 11 . In addition, the basic structure of the hose structure of this embodiment is the same as that of the hose structure 7 of the above-mentioned seventh embodiment, and only the structure of the internal member is partially different. Hereinafter, the configuration of the hose structure 7 according to the eighth embodiment will be mainly explained in terms of the configuration different from the hose structure 7 according to the seventh embodiment.

As shown in FIG. 11, the internal member 86 (flow-through member) of the hose structure of the eighth embodiment is the same as the above-mentioned internal member 76, and the section perpendicular to the axis is set to be approximately elliptical, and the major axis La The wall thickness t1 (thickness) of the major axis portion Lp facing in the opposite direction is thicker than the wall thickness t2 (thickness) of the minor axis portion Sp facing in the direction of the minor axis Sx. On the other hand, the inner member 86 is different from the above-mentioned inner member 76 whose cross-section is glasses-shaped, and the short-axis portions Sp, Sp facing the short-axis Sx direction are not deformed (not dented toward the center of the substantially ellipse). Since the minor axis portion Sp of the inner member 86 is not recessed toward the center, the minor axis Sx is longer than the minor axis Sa of the inner member 76 whose cross section is glasses-shaped.

Even in the inner member 86 that is not set in the cross-sectional glasses shape, by making the long-axis portion Lp thicker and the short-axis portion Sp thinner, the easily deformable portion (short-axis portion Sp) of the inner member 86 can be determined, so The direction of bending when shrinking into a helical shape is easier to unify, so that it can be folded more smoothly. In addition, since the long-axis portion Lp is thickened and hardened into a hard-to-deform portion, this portion can be secured as a water-passing area, so that the drainage effect (drainage) during folding can be improved, and the water-permeability at the initial stage of water passage can also be improved. enhance. In addition, since the short-axis portion Sp is thinned, it is easy to expand even under low water pressure, and at the same time, the long-axis portion Lp is thickened to prevent excessive load from being applied to the inside due to the expansion or expansion of the passage member beyond necessity. The state of the member 86 and the member (external member) covering the inner member 86.

[Ninth Embodiment]

Next, a hose structure according to a ninth embodiment will be described with reference to Fig. 12 . In addition, the basic structure of the hose structure of this embodiment is the same as that of the hose structure 7 of the above-mentioned seventh embodiment, and only the structure of internal members is partially different. Hereinafter, the configuration of the hose structure of the ninth embodiment is mainly different from that of the hose structure 7 of the seventh embodiment.

As shown in Fig. 12(a) to Fig. 12(c), the internal members 96 (refer to Fig. 12(a)) and 106 (refer to Fig. 12(b)) of the hose structure of the ninth embodiment , 116 (refer to FIG. 12 (c)) is the same as the above-mentioned internal member 76, and its cross-section perpendicular to the axis is set to a substantially elliptical shape. On the other hand, the inner members 96 , 106 , and 116 are not formed in the cross-sectional glasses shape unlike the above-mentioned inner member 76 whose cross-section is glasses-shaped.

Further, among the inner members 96, 106, 116, reinforcing members 99, 109, 119 are respectively provided on the major axis portions Lp facing each other in the major axis direction of the cross section.

As shown in FIG. 12( a ), the inner member 96 has a reinforcing member 99 extending outward in the longitudinal direction from the longitudinal portion Lp as the reinforcing member. Unlike the above-mentioned inner member 76, the inner member 96 has the wall thicknesses of the long-axis portion Lp and the short-axis portion Sp set at the same level. In the inner member 96, by providing the reinforcing member 99, an outward tensile force acts on the major axis portion Lp. With this structure, similar to the case where the thickness of the long-axis portion Lp is thickened, the long-axis portion Lp becomes a portion that is difficult to deform, and the portion that is easily deformed (short-axis portion Sp) becomes clear and shrinks into a spiral The bending direction of the shape can be unified.

Furthermore, as shown in Fig. 12(b), the internal member 106 is provided with a reinforcing member 109 as the above-mentioned reinforcing member on the inner side (the center side of the ellipse) of the major axis portion Lp. The reinforcing member 109 extends axially along the long axis portion Lp of the inner member 106 . The reinforcing member 109 is integrally formed of the same material as other parts of the inner member 106 . Furthermore, as shown in FIG. 12(c), the inner member 116 is provided with a reinforcement member 119 as the above-mentioned reinforcement member on the inner side (the center side of the ellipse) of the major axis portion Lp. The reinforcing member 119 extends axially along the long axis portion Lp of the inner member 106 . The reinforcement member 119 is formed of a material different from other parts of the internal member 106 , such as silk thread. Like the internal members 106 and 116, even if a reinforcing member is provided, the wall thickness of the long-axis portion Lp can be made thicker than the wall thickness of the short-axis portion Sp. According to this configuration, the long-axis portion Lp becomes a portion that is difficult to deform, and the portion that is easily deformed (short-axis portion Sp) becomes clear, and the bending direction when shrinking into a helical shape is unified.

10‧‧‧Hose Department

11‧‧‧Liquid source connector

12‧‧‧Nozzle connector

13‧‧‧Nozzle part

14‧‧‧press handle

15‧‧‧water head

Claims (6)

A hose structure, comprising: a flow-through member for fluid flow; a telescopic member, which is set as a member different from the aforementioned flow-through member, extends along the aforementioned flow-through member, and is configured to be able to move along with the aforementioned flow-through member The flow state in the middle expands and contracts toward the extension direction of the aforementioned flow-through member; and covers the outer member as the inner member of the aforementioned flow-through member, the aforementioned telescopic member is set as a member different from the aforementioned inner member and the aforementioned outer member, and the aforementioned The telescopic member is arranged between the radial direction of the inner member and the outer member, and is arranged in a biased state in a predetermined area in the circumferential direction of the inner member. The hose structure described in claim 1 further includes a pressure reducing valve for controlling the pressure applied to the passage member. In the hose structure described in claim 1, the flow-through member is formed to have a substantially elliptical cross-section. The hose structure as described in item 3 of the scope of the patent application, wherein, in the cross-section of the aforementioned flow-through member, the thickness of the long-axis portion facing the long-axis direction is thicker than that of the short-axis portion facing the short-axis direction Thicker. The hose structure according to claim 4 of the patent application, wherein the short-axis portions of the flow-through member facing each other in the short-axis direction are deformed toward each other. The hose structure described in any one of items 3 to 5 of the scope of application Body, wherein in the cross-section of the aforementioned flow-through member, reinforcing members are provided on the long-axis portions facing each other in the long-axis direction.

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