hose
By using a reinforcing layer on the tube body made of wires made of single strands and steel wire ropes formed by twisted steel wire fibers, combined with uniform distribution and spiral winding at a specific angle, the problem of flexibility and strength in the existing technology where the reinforcing layer is only made of steel wire is difficult to balance is solved, and a better balance of pressure resistance and flexibility is achieved.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- BRIDGESTONE CORP
- Filing Date
- 2024-12-18
- Publication Date
- 2026-06-30
AI Technical Summary
In existing technologies, reinforcement layers composed solely of steel wires possess a certain strength, but they are difficult to balance with flexibility.
The composite structure is formed by using wire made of single strand material and a reinforcing layer made of steel wire rope formed by twisting multiple steel wire fibers, combined with uniformly distributed steel wire rope and wire. The reinforcing layer is spirally wound around the tube body within a certain angle range.
This achieves a simultaneous improvement in the pressure resistance and flexibility of the tube body, ensuring shape stability and meeting the requirements for weight, outer diameter, and pressure resistance.
Smart Images
Figure 2026106642000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a hose.
Background Art
[0002] Patent Document 1 discloses a tip hose for placing fresh concrete, which has a hose body made of a flexible material, in which a spiral steel cord is embedded in the middle part of the wall thickness of the hose body, and the reinforcing hose part in which the steel cord is embedded in the hose body is configured such that its cross section has a flat shape.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] In the configuration described in Patent Document 1, since it is composed only of wires, it is easy to obtain strength but difficult to ensure flexibility.
[0005] Here, the disclosure person according to the present disclosure has obtained the knowledge that the pressure resistance and flexibility of the hose are improved by applying the technical matters disclosed below to the hose.
[0006] The present disclosure aims to provide a hose that is more likely to achieve both improved pressure resistance and improved flexibility compared to the case where the reinforcing layer is composed only of steel cords.
Means for Solving the Problems
[0007] A hose according to the first embodiment comprises a tube made of a flexible material and a reinforcing layer that covers the outer surface of the tube or tubular body and reinforces the tube or tubular body, wherein the reinforcing layer includes a wire formed from a single-strand material and a steel cord formed by twisting together a plurality of steel filaments.
[0008] In this embodiment of the hose, the reinforcing layer has wires to improve pressure resistance and steel cords to improve flexibility. Therefore, with this embodiment of the hose, it is easier to achieve both improved pressure resistance and improved flexibility compared to cases where the reinforcing layer is composed of wires only or steel cords only.
[0009] In the second embodiment of the hose, the reinforcing layer is provided such that the steel cords are equally distributed in the circumferential direction when viewed from the extension direction of the tube.
[0010] In this embodiment of the hose, since the steel cords are evenly distributed in the reinforcing layer, the hardness of the reinforcing layer tends to be uniform. Therefore, with this embodiment of the hose, the shape is easily maintained even when no pressure is applied to the tube.
[0011] The third embodiment of the hose is the hose described in the first or second embodiment, wherein the wire or steel cord has a winding angle of 10° to 80° with respect to the extension direction of the tube.
[0012] According to this embodiment of the hose, problems are less likely to occur when winding wire or steel cord around the tube.
[0013] The fourth embodiment of the hose is the hose described in any one of the first to third embodiments, wherein the wire or steel cord has a ratio of wire diameter to tube diameter that is greater than 0 and less than or equal to 0.3.
[0014] According to this embodiment of the hose, a hose having a reinforcing layer can easily meet required performance requirements such as weight, outer diameter, and pressure resistance while simultaneously achieving improved pressure resistance and flexibility.
[0015] The fifth embodiment of the hose is the hose described in any one of the first to fourth embodiments, wherein the number of wires and steel cords constituting the reinforcing layer is two or more.
[0016] According to this embodiment of the hose, a hose having a reinforcing layer can easily meet required performance requirements such as weight, outer diameter, and pressure resistance while simultaneously achieving improved pressure resistance and flexibility.
[0017] The hose of the sixth embodiment is a hose according to any one embodiment of the first to fifth embodiments, further comprising a plurality of reinforcing layers, wherein each plurality of reinforcing layers includes at least one right-handed layer in which the wire and the steel cord are wound clockwise with respect to the stretching direction, and at least one left-handed layer in which the wire and the steel cord are wound counterclockwise with respect to the stretching direction.
[0018] In this embodiment of the hose, since it includes at least one right-handed layer and one left-handed layer, when pressure is applied to the tube, the direction in which the reinforcing layer expands radially while twisting circumferentially is easily canceled out by the right-handed and left-handed layers. For this reason, the hose according to this embodiment can easily meet the required performance in terms of weight, outer diameter, and pressure resistance while simultaneously achieving improved pressure resistance and flexibility.
[0019] The hose of the seventh embodiment is the hose described in the sixth embodiment, wherein the angle between the wire and steel cord constituting the right-handed layer and the wire and steel cord constituting the left-handed layer is in the range of 20° to 160°.
[0020] According to this embodiment of the hose, changes in the length and diameter of the hose are easily suppressed even when pressure is applied to the tube.
[0021] The hose according to the eighth aspect is the hose according to the sixth aspect, wherein the winding directions of the wire and the steel cord included in each of the plurality of reinforcing layers are only in one direction with respect to the stretching direction.
[0022] According to the hose according to this aspect, a hose having a spiral structure can be obtained.
[0023] The hose according to the ninth aspect is the hose according to any one of the first to sixth aspects, wherein at least one of the plurality of reinforcing layers is configured by weaving and arranging the wire and the steel cord.
[0024] According to the hose according to this aspect, a hose having a blade structure can be obtained.
Advantages of the Invention
[0025] According to the present disclosure, it is possible to provide a hose that is more likely to achieve both improved pressure resistance and improved flexibility compared to the case where the reinforcing layer is composed only of a steel cord.
Brief Description of the Drawings
[0026] [Figure 1] It is a view showing the structure of the hose according to the embodiment, and is a view showing a part of the hose broken. [Figure 2] It is a view showing the structure of the hose according to the embodiment following FIG. 1, and is a cross-sectional view of the hose. [Figure 3] It is a view showing the structure of the wire and the steel cord used for the reinforcing layer in the present embodiment, wherein (A) is a front view of the steel cord, (B) is a cross-sectional view of the steel cord, and (C) is a front view of the wire. [Figure 4] It is a view showing the state in which the wire and the steel cord used for the reinforcing layer in the present embodiment are formed, and is a view showing the winding angle with respect to the extending direction of the tube.
Modes for Carrying Out the Invention
[0027] Hereinafter, embodiments for realizing the technology of this disclosure will be described in detail with reference to the drawings.
[0028] Furthermore, components and processes that perform the same function or action are given the same reference numerals throughout all drawings, and redundant explanations may be omitted as appropriate. In addition, this disclosure is not limited in any way to the following embodiments, and can be implemented with appropriate modifications within the scope of the purpose of this disclosure.
[0029] (Hose 10 function) The hose 10 in this embodiment is used, for example, to transport fluids such as hydraulic fluid for hydraulic equipment, industrial water, and fuel oil. Specifically, when the fluid to be transported is sent inside the tube 12, the reinforcing layer restricts the expansion of the tube 12 due to the increase in internal pressure, thereby enabling the transport of the fluid. The specific configuration of the hose 10 in this embodiment will be described with reference to Figures 1 and 2.
[0030] (composition) Figures 1 and 2 show an example of the structure of the hose 10 according to this embodiment. As shown in Figures 1 and 2, the hose 10 according to this embodiment comprises a tube 12, a first reinforcing layer 50, an intermediate layer 20, a second reinforcing layer 60, and an outer layer 30.
[0031] As shown in Figures 1 and 2, tube 12 is a cylindrical member made of a flexible material. Examples of flexible materials include rubber, artificial resins containing polyamide resin, polyester resin, polyurethane, and POM (polyoxymethylene). Furthermore, the structure of tube 12 can be a single layer using any one of these materials, or a multi-layer structure combining any of these materials.
[0032] The first reinforcing layer 50 is formed by combining multiple wires 72 and multiple steel cords 74. More specifically, as shown in Figures 1 and 2, the first reinforcing layer 50 is formed by winding multiple wires 72 and multiple steel filaments F around the tube 12.
[0033] The steel cord 74 of the first reinforcing layer 50 is formed by twisting together multiple steel filaments F, as shown in Figures 2 and 3. More specifically, the steel cord 74 is made up of multiple (three in Figure 3) steel filaments F twisted together to form a single cord, as shown in Figures 3(A) and (B). The wire 72 of the first reinforcing layer 50 is made of a single wire material, as shown in Figure 3(C).
[0034] Then, as shown in Figure 4, each of the multiple wires 72 and the multiple steel cords 74 are formed by winding around the outer circumference of the tube 12 in the direction of extension 10C of the tube 12. In other words, the outer circumference of the tube 12 is covered by each of the multiple wires 72 and the multiple steel cords 74 being wound spirally around it.
[0035] As an example of the winding method, the wire 72 or steel cord 74 may be wound clockwise with respect to the extension direction 10C of the tube 12, as shown in Figure 4(A), or counterclockwise with respect to the extension direction 10C of the tube 12, as shown in Figure 4(B). The angle formed by the wire 72 or steel cord 74 when viewed from a direction perpendicular to the extension direction 10C of the tube 12 is called the "winding angle".
[0036] In this explanation, as shown in Figures 4(A) and (B), right-handed winding is considered positive with respect to the extension direction 10C of the tube 12, and the opposite direction is considered negative. Furthermore, if no positive or negative sign is given to the winding angle, it refers to either right-handed or left-handed winding, or both.
[0037] In the following explanation, a reinforcing layer wound clockwise with respect to the extension direction of the tube 12 will be referred to as the "right-handed layer." A reinforcing layer wound counterclockwise with respect to the extension direction of the tube 12 will be referred to as the "left-handed layer."
[0038] As an example of the material for wire 72, iron, iron-based alloys including stainless steel, and titanium may be used. Furthermore, these materials may be plated with other metals for wire 72. As an example of the material for steel filament F, iron, iron-based alloys including stainless steel may be used.
[0039] Furthermore, as shown in Figure 2, the steel filaments F are equally spaced in the circumferential direction within the reinforcing layer. More specifically, in this embodiment, the steel filaments F are arranged so that they are equally spaced in the circumferential direction when viewed in a longitudinal cross-section of the hose 10.
[0040] As shown in Figure 1, the intermediate layer 20 is a component that covers the outer periphery of the first reinforcing layer 50. More specifically, the intermediate layer 20 is composed of rubber, resin, adhesive, etc., and functions as a component that prevents wear caused by contact between the first reinforcing layer 50 and the second reinforcing layer 60.
[0041] The second reinforcing layer 60 is formed by combining multiple wires 72 and multiple steel cords 74. In other words, the second reinforcing layer 60 has the same structure as the first reinforcing layer 50. The second reinforcing layer 60 also covers the outer periphery of the intermediate layer 20.
[0042] As shown in Figure 1, the second reinforcing layer 60 may be wrapped around the intermediate layer 20 at a different angle than the first reinforcing layer 50. More specifically, the wrapping angle of the wire 72 or steel cord 74 of the second reinforcing layer 60 may be opposite to or the same as the wrapping angle of the wire 72 or steel cord 74 of the first reinforcing layer 50, as shown in Figure 1. Alternatively, the wrapping angle of the wire 72 or steel cord 74 of the second reinforcing layer 60 may be the same as the wrapping angle of the wire 72 or steel cord 74 of the first reinforcing layer 50.
[0043] Here, the intermediate layer 20 covered by the second reinforcing layer 60 is formed as a tubular member extending in the direction of extension of the tube 12. In other words, the intermediate layer 20 covered by the second reinforcing layer 60 is an example of a "tubular body" in this embodiment.
[0044] As shown in Figure 1, the outer layer 30 is a component that covers the outer periphery of the second reinforcing layer 60. More specifically, the outer layer 30 is composed of rubber, resin, adhesive, etc., and protects the second reinforcing layer 60 from the external environment, while also functioning as a decorative surface for the hose 10. The outer layer 30 is an example of a "covering layer" in this embodiment.
[0045] As shown in Figure 1, the first reinforcing layer 50 and the second reinforcing layer 60 are formed from a plurality of wires 72 and a plurality of steel cords 74. Therefore, the hose 10 in this embodiment is made of a flexible material, and the user can bend it in the extension direction 10C of the tube 12.
[0046] Although Figure 1 shows an example with a first reinforcing layer 50 and a second reinforcing layer 60, the examples of reinforcing layers are not limited to this. That is, the reinforcing layer may consist of only one layer, the first reinforcing layer 50, or it may consist of three or more layers, more than the third reinforcing layer. When there is only one reinforcing layer, the intermediate layer 20 is not present. When there are three or more layers, the intermediate layer 20 is placed between each reinforcing layer.
[0047] Furthermore, as shown in the tests described later, the hose 10 may be configured without an outer layer 30. That is, the reinforcing layer may be the outermost layer of the hose 10.
[0048] In this embodiment, it is desirable that the steel cords 74 are equally distributed in the first reinforcing layer 50 and the second reinforcing layer 60 in the circumferential direction when viewed from the extension direction C of the tube 12. Distributing the steel cords 74 equally in each reinforcing layer makes it easier to achieve uniform hardness in the reinforcement layer. This makes it easier to maintain the shape of the hose 10 even when no pressure is applied to the tube 12.
[0049] Furthermore, in the above-described embodiment, the first reinforcing layer 50 and the second reinforcing layer 60 were formed by winding wire 72 and steel cord 74, respectively. In the hose 10 of this embodiment, the first reinforcing layer 50 and the second reinforcing layer 60 may be formed by winding wire 72 and steel cord 74 while weaving them together. A structure in which wire 72 and steel cord 74 are woven together is called a braided structure.
[0050] Furthermore, since the blade structure is a structure in which the wire 72 and steel cord 74 are woven together, the wire 72 and steel cord 74 intersect to form the reinforcing layer. Therefore, the reinforcing layer having a blade structure includes both those in which the wire 72 or steel cord 74 is wound clockwise with respect to the extension direction of the tube 12, and those in which it is wound counterclockwise.
[0051] (Required characteristics for hose 10) Incidentally, the hose 10 in this embodiment is generally required to have both strength and flexibility. More specifically, the hose 10 is required to have the ability to transport fluids at higher pressures and to be able to bend more easily. However, strength and flexibility are generally difficult properties to achieve simultaneously.
[0052] The reason for this is that increasing the thickness of the reinforcing layer, in other words, increasing the diameter of the wire 72 and steel cord 74, increases the strength of the reinforcing layer, making it less susceptible to bending under external force. Therefore, increasing the strength of the hose 10 tends to decrease its flexibility. The reverse is also true; decreasing the diameter of the wire 72 and steel cord 74 increases the flexibility of the reinforcing layer, which tends to decrease the strength of the reinforcing layer. Therefore, increasing the flexibility of the hose 10 tends to decrease its strength.
[0053] On the other hand, by combining the wire 72 and the steel cord 74 to form a reinforcing layer, both flexibility and strength can be improved.
[0054] While embodiments of this disclosure have been described above with reference to the attached drawings, it is clear that any person with ordinary skill in the art to which this disclosure belongs could conceive of various modifications or applications within the scope of the technical idea described in the claims, and these too are naturally understood to fall within the technical scope of this disclosure. [Explanation of Symbols]
[0055] 10 hoses 12 tubes 20 Middle Class 30 outer layer 50 First reinforcement layer 60 Second reinforcement layer 72 wires 74 Steel Cord 10C Stretching direction F filament
Claims
1. Tube and, A reinforcing layer that covers the outer surface of the tube or tubular body and reinforces the tube or tubular body, A hose equipped with, The reinforcing layer includes a wire formed from a single-strand material and a steel cord formed by twisting together multiple steel filaments. hose.
2. The reinforcing layer is such that the steel cords are equally distributed in the circumferential direction when viewed from the direction of extension of the tube. A hose as described in claim 1.
3. The wire or steel cord has a winding angle of 10° to 80° with respect to the extension direction of the tube. A hose as described in claim 1.
4. The wire or steel cord has a ratio of wire diameter to tube diameter that is greater than 0 and less than or equal to 0.
3. A hose as described in claim 1.
5. The number of wires and steel cords constituting the reinforcing layer is two or more, A hose as described in claim 1.
6. The reinforcing layers comprise multiple such layers, Each of the plurality of reinforcing layers includes at least one right-handed layer in which the wire and the steel cord are wound clockwise with respect to the stretching direction of the tube, and at least one left-handed layer in which the wire and the steel cord are wound counterclockwise with respect to the stretching direction. A hose as described in claim 1.
7. The angle between the wire and steel cord constituting the right-handed layer and the wire and steel cord constituting the left-handed layer is in the range of 20° to 160°. A hose according to claim 6.
8. In each of the aforementioned multiple reinforcing layers, the direction in which the wire and steel cord included in the structure are wound is in only one direction with respect to the extension direction. A hose according to claim 6.
9. At least one of the multiple reinforcing layers is constructed by weaving together the wire and the steel cord, A hose according to any one of claims 1 to 6.