JPH0642681A - Braided flexible hose - Google Patents

Abstract

PURPOSE:To provide a braided flexible hose which may be curved into a desired shape without changing the physical property of the hose, and which may be held in the shape. CONSTITUTION:A braided flexible hose is composed of a braided layer 13 in which fiber threads are braided into a cylindrical shape and which is formed on the outer periphery of a tube layer 12 made of rubber or synthetic resin, and a cover layer 14 which is made of rubber or synthetic resin and which is formed on the outer peripheral surface of the braided layer 13. Further, for example, four metal wires 15 are laid linearly in the braided layer 13, along the axial direction of the hose 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braided flexible hose used as a hose for transporting gas or liquid.

[0002]

2. Description of the Related Art For example, a hydraulic hose of a machine tool or the like is required to have pressure resistance and flexibility because it is used at high pressure. Therefore, a braided flexible hose is generally used.

In this braided flexible hose, a fiber yarn or a metal wire yarn is braided in a tubular shape by a braiding machine (BRAIDER) on the outer peripheral surface of a tube layer which is an inner layer made of rubber or synthetic resin, and is reinforced by the braided layer. A cover layer made of rubber or synthetic resin is provided as an outer layer on the outer peripheral surface of the layer.

On the other hand, in the cloth wound type hoses, the reinforcing layer is formed by laminating several fiber cloths. The metal wire threads used for these hoses are for the purpose of preventing crushing and reinforcing the hose, and are arranged in a spiral shape or at a constant angle with respect to the axial direction of the hose.

Therefore, although the hose is flexible and can be bent in any direction, it cannot be restored due to the repulsive elasticity of rubber or other materials used, and the shape as bent cannot be maintained. When it is necessary to forcibly maintain the desired hose bend shape, the following method can be considered.

(A) A hose is set in a mold or a wooden frame that has been bent into a required shape in advance, or a core rod that has been bent into a required shape is inserted into a hose and heat-treated. A method of maintaining the bent shape. (b) A method in which a metal spiral tube is incorporated inside a hose, the hose is bent into a desired shape, and the bent shape of the hose is retained by the shape retaining force of the metal spiral tube.

(C) A straight metal wire is interposed between the braided layer and the cover layer of the hose, the hose is bent into a desired shape, and the bent shape of the hose is maintained by the shape holding force of the metal wire. Method.

[0008]

[Problems to be Solved by the Invention]
The method (a) has a problem in that one die or core rod is required for each product, equipment for heat treatment is required, and deterioration of physical properties due to heat treatment cannot be avoided. Method (b) increases the weight and cost of the product because the metal spiral tube is incorporated inside the hose, and it becomes difficult to attach the mouthpiece to the end of the hose.

In the method (c), in addition to the difficulty of forming a linear metal wire between the braid layer and the cover layer, the metal wire is liable to be displaced when bent, and the cover layer A metal wire strip is formed on the outer peripheral surface of the hose, which makes it difficult to attach the mouthpiece to the end of the hose.

The present invention has been made in view of the above circumstances, and the purpose thereof is to keep the shape of a hose by bending it into a desired shape without changing the physical properties of the hose. It is to provide a braided flexible hose.

[0011]

In order to achieve the above-mentioned object, the present invention provides a braided layer obtained by braiding a fiber thread or a metal wire thread in a tubular shape on an inner layer and an outer layer of rubber or synthetic resin. In the braided flexible hose obtained by applying the above, at least one metal filament is linearly attached in the braided layer in the axial direction of the hose.

According to a second aspect of the present invention, there is provided a braided flexible hose in which a braided layer formed by braiding fiber yarns or metal wire yarns in a tubular shape is provided with inner and outer layers of rubber or synthetic resin, and at least one or more braided layers are provided in the braided layer. The hose is bent in a state where the metal wire is attached linearly along the axial direction of the hose, and crimping metal fittings for fixing the ends of the metal wire are provided at both ends of the hose to bend the hose. There is a shape retention.

[0013]

[Function] When the hose is bent, the metal wire linearly attached in the braid layer along the axial direction of the hose also bends, and the end of the metal wire located inside the curve protrudes from the end surface of the hose, and The end of the metal wire located outside is drawn in from the end surface of the hose.

In this state, if crimping metal fittings are provided at both ends of the hose to fix the ends of the metal wire, the metal wire is stretched and bent to resist the elastic restoring force of the braided layer, the inner layer and the outer layer. Retains shape.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment. The braided flexible hose 11 includes a tube layer 12 as an inner layer made of rubber or synthetic resin, and the tube layer 12
A braid layer 13 in which a fiber yarn (or a metal wire yarn) 13a is braided in a cylindrical shape on the outer peripheral surface of the braided machine (BRAIDER), and a cover as an outer layer made of rubber or synthetic resin coated on the outer peripheral surface of the braid layer 13 And layer 14.

In the braided layer 13, four non-stretchable metal filaments 15 such as stainless wires are linearly attached at equal intervals in the circumferential direction in the axial direction of the hose 11. . That is, the metal wire 15 is a braiding machine (BRAIDE
R) to braid the fiber yarn 13a into a tubular shape to form a braided layer 13
Fiber yarn for braiding at the same time when forming
It is fixed by 3a.

The straight long hose 11 thus constructed is cut into a predetermined length and bent into a desired shape depending on the place of use. In this case, the hose 11
Since has flexibility, it can be easily bent into any shape as shown in FIG. Further, when the metal wire 15 is a plastically deformable metal, the metal wire 15 is bent and plastically deformed as the hose 11 is bent. Retained in shape.

At this time, since the metal filament 15 is braided at the same time when the braid layer 13 is formed, the metal filament 15 is fixed by the fiber yarn 13a for braiding, and it is possible to prevent the metal filament 15 from being displaced in the circumferential direction. Are arranged at intervals of.

4 to 6 show the second embodiment, and the same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The braided flexible hose 11 formed similarly to the first embodiment differs depending on the application, but when cut to a required length, as shown in FIG. The metal wire 15 is inserted straightly over the end of the metal wire 15. The end 15a of the metal wire 15 is the end surface 11 of the hose 11.
It is located at a.

When this hose 11 is bent as shown in FIG. 2B, the metal wire 15 is also bent, and the end 15a of the metal wire 15 located inside the curve of the hose 11 is the hose 11.
The end 15a of the metal wire 15 protruding from the end surface 11a of the hose 11 and located on the curved outer side of the hose 11 is
The phenomenon of pulling in from a occurs.

Therefore, first, as shown in FIG.
As shown in FIG. 5, a caulking metal fitting 16 is fixed to one end of the straight hose 11 cut into a predetermined length. This caulking metal fitting 16 is composed of a nipple 16a having saw teeth inserted inside the hose 11, a socket 16b having saw teeth fitted to the outside of the hose 11 and a connection nut 16c. By crimping the end of 11, the end 15a of the metal wire 15 is fixed.

Next, as shown in FIG. 6, when the hose 11 is bent into a desired shape, the metal wire 15 is also bent, and the end 15a of the metal wire 15 located inside the curve of the hose 11 is connected to the hose 11. The end 15a of the metal wire 15 protruding from the end surface 11a and located outside the curved portion of the hose 11 is
Is pulled in from the end face 11a.

Therefore, the end of the hose 11 is cut from the cutting position (point x in FIG. 6), that is, from the end 15a of the metal wire 15 drawn from the end surface 11a of the hose 11, and the end of the hose 11 is cut into The caulking metal fitting 16 is fixed, and the end 15a of the metal wire 15 is fixed.

When the caulking metal fittings 16 are fixed to both ends of the hose 11 in this way, the end 15a of the metal wire 15 is also fixed to the caulking metal fitting 16, and the metal wire 15 is non-stretchable. Therefore, the bending shape is maintained against the elastic restoring force of the braid layer 13, the inner layer 12, and the outer layer 14. According to this embodiment, the metal filament does not need to be a plastically deformable metal and is an elastically deformable metal filament that suppresses restoration of the hose 11 and is held in a bent shape.

In the first and second embodiments, when the fiber yarn 13a is braided in a tubular shape by the braiding machine (BRAIDER) to form the braided layer 13, the four metal filaments 15 are formed.
However, the number of the metal filaments 15 is not limited, and the number of the metal filaments 15 is not limited as long as the hose 11 can be restrained from being restored and can be held in a bent shape.

As described above, the hose is generally used by bending it into various shapes at the time of use. The smaller the bending radius, the easier the hose is to bend and the easier handling and use.
However, if the bending radius is too small, the hose may be deformed or broken, and the original function may be impaired.

Therefore, it is customary for the hose to have a minimum bending radius defined according to its type, diameter and the like. The minimum bending radius, that is, the minimum bending radius that can be used without deteriorating the function of the hose, and the weight reduction of the hose itself are also major factors of the usage requirements. It is necessary to select the diameter.

For example, in the case of a hose having an inner diameter of 12.7 mmΦ braided with fiber threads (nylon, vinylon thread, etc.), a metal wire diameter of 0.5 mmΦ is effective for weight reduction, but the bending radius is Bending to the inner diameter of the hose x 5 times = 63.5 mm causes kink or significant deformation, but 0.8 m
This phenomenon does not occur with a wire diameter of m to 1.0 mmΦ.
Further, even if the wire diameter is 1.2 mmΦ or more, it is effective, but there is a problem that the hose weight increases. Therefore, since the hose diameter, the bending radius, and the metal wire diameter are related to each other, it is necessary to select the metal wire diameter and the material according to the purpose.

Next, an apparatus for manufacturing a braided flexible hose constructed as described above will be described. 7 to 12 show a braiding machine, which has the same basic structure as the conventional one (Japanese Utility Model Publication No. 50-32594) except for the essential parts. Two
1 is a machine stand installed vertically to the floor,
A base plate 22 is arranged on the front surface of the machine base 21.

As shown in FIGS. 7 and 8, a hose material insertion hole 23 is formed at the center of the machine base 21 and the base plate 22. The base plate 22 is provided with a plurality of 8-shaped carrier guide grooves 24 arranged in an annular shape around the hose material insertion hole 23.

As shown in FIG. 9, a through hole 25 is formed in the center of each of the carrier guide grooves 24, and a spool-like rotating body 26 is rotatably supported in the through hole 25. ing. A gear 27 is provided at one end of the rotating body 26 between the machine base 21 and the base plate 22, and a disk-shaped cam plate 28 positioned at the front part of the base plate 22 is provided at the other end. Has been.

Further, a bearing hole 29 penetrating this central portion is formed in the rotating body 26, and a bolt 30 penetrates the bearing hole 29. The head of this bolt 30 is the cam plate 2
8 is in contact with the front surface of the machine base 8, and the base end portion thereof penetrates to the back surface side of the machine base 21.

Further, a nut 32 is screwed into the threaded portion 31 of the bolt 30 on the rear surface side of the machine base 21, and the bolt 3
0 is fixed to the machine base 21. Therefore, the rotating body 26 is rotatably supported by the bolt 30, and the gears 27 of the plurality of adjacent rotating bodies 26 are meshed with each other, and any one of the gears 27 is meshed with the drive gear (not shown). When the rotation is transmitted by the rotation, the adjacent rotating bodies 26 rotate in opposite directions.

Of the plurality of rotating bodies 26 thus arranged in an annular shape, four rotating bodies 26 located at equal intervals on the circumference are replaced by the bolts 30 as shown in FIG. Therefore, the guide pipe 33 having the wire rod insertion hole 33a penetrates therethrough. The tip end of the guide pipe 33 projects above the cam plate 28, and the base end thereof penetrates to the back surface side of the machine base 21.

Further, a threaded portion 34 is formed at the base end portion of the guide pipe 33, and a nut 32 is screwed into the threaded portion 34 on the rear surface side of the machine base 21, so that the guide pipe 33 is attached to the machine base 21. Fixed. Therefore, the rotating body 26 is rotatably supported by the guide pipe 33.

Two notches 35 are symmetrically provided on the peripheral edge of the cam plate 28 so as to correspond to the intersecting portions 24a of the carrier guide groove 24.
The shaft portion 37 of 6 is engaged.

Further, as shown in FIGS. 11 and 12, a flange 38 is provided on the upper portion of the shaft portion 37 of the carrier 36, and an end plate 39 is integrally provided on the lower portion.
A circular recess 40 is symmetrically provided on the lower surface of the end plate 39, and a circular leg plate 41 is rotatably fitted in the circular recess 40.

On the lower surface of the circular leg plate 41, the engaging projection 4 of the ridge is formed.
2 is provided, and the engaging convex portion 42 engages with the carrier guide groove 24 so that the circular leg plate 41 rotates along the curved path of the carrier guide groove 24.

A shaft portion 37 is provided on the flange 38 of the carrier 36.
A braided bobbin shaft 43 is integrally provided coaxially with. The fiber yarn 13a is wound around the braided yarn winding shaft 43,
The metal wire 15 wound around the reel 44 is inserted into the wire rod insertion hole 33a of the guide pipe 33.

In the hose material insertion hole 23 of the machine base 21 and the base plate 22, the tube layer 1 as a hose material is used.
2 is inserted, and the tube layer 12 is pulled in the direction of the arrow along with the braiding.

According to the braiding machine thus constructed, the fiber yarns 13a are paid out from the plural braided thread winding shafts 43, the metal filaments 15 wound around the reels 44 are paid out from the guide pipes 33, and the respective tip portions thereof are paid out. Is fixed to the outer peripheral surface at the tip of the tube layer 12.

When the braiding machine is driven in this state, the gears 27 of the plurality of rotors 26 are meshed with each other, so that the rotation of the gears 27 causes the adjacent rotors 26 to rotate in opposite directions. When the rotating body 26 rotates, the cam plate 2
The carrier 36, which is engaged with the notch portion 35 of 8, moves along the carrier guide groove 24 while intersecting with each other in the left-right direction.

Therefore, the braided yarn winding shaft 4 of the carrier 36
The plurality of fiber yarns 13a fed from 3 are braided on the outer peripheral surface of the tube layer 12, and the metal filaments 15 fed from the guide pipe 33 are linearly attached along the axial direction of the tube layer 12. The metal filament 15 is attached by the braided fiber thread 13a.

By providing the braid layer 13 by braiding the fiber yarn 13a and the metal filament 15 to the tube layer 12 and providing the braid layer 13 with the outer periphery of the braid layer 13, the outer periphery of the braid layer 13 is covered with a cover layer 14 made of rubber or synthetic resin. The tube layer 12, the braid layer 13 to which the metal wire 15 is attached, and the cover layer 14 have a three-layer structure, and the braided flexible hose 11 is completed by heat-treating and vulcanizing this.

[0046]

As described above, according to the present invention, the plastically deformable metal filament is linearly attached in the braid layer in the axial direction of the hose. The metal filament maintains the bent shape against the elastic restoring force of the braid layer, the inner layer and the outer layer. Therefore, the shape can be maintained by bending it into a desired shape without changing the physical properties of the hose, which is suitable as a hydraulic hose for machine tools, for example.

[Brief description of drawings]

FIG. 1 is a side view of a braided flexible hose showing a first embodiment of the present invention.

FIG. 2 is a half sectional view and a lateral sectional view of the hose of the same embodiment.

FIG. 3 is a perspective view showing a state where the hose of the embodiment is bent.

FIG. 4 is a side view of the braided flexible hose according to the second embodiment of the present invention, in which (a) is a straight state and (b) is a curved state.

5A and 5B show a state in which a caulking metal fitting is fixed to the hose of the embodiment, FIG. 5A is a partially cutaway side view, and FIG. 5B is an enlarged cross-sectional view of part a of FIG.

FIG. 6 is a side view showing a state where the hose of the embodiment is bent.

FIG. 7 is a schematic front view of the braiding machine of the example.

FIG. 8 is a schematic side view of the braiding machine of the example.

FIG. 9 is a vertical sectional side view of the carrier mechanism portion of the embodiment.

FIG. 10 is a vertical cross-sectional side view of the lead-out portion of the metal wire of the carrier mechanism portion of the embodiment.

FIG. 11 is a side view of the carrier according to the embodiment with a part thereof cut away.

FIG. 12 is a bottom view of the carrier according to the embodiment.

[Explanation of symbols]

11 ... Hose, 12 ... Tube layer (inner layer), 13 ... Reinforcing layer, 13a ... Fiber yarn, 14 ... Cover layer (outer layer), 15 ...
Metal wire.

Claims (2)

[Claims] 1. A braided flexible hose comprising a braided layer formed by braiding fiber yarns or metal wire yarns in a tubular shape with an inner layer and an outer layer of rubber or synthetic resin, and at least one or more metal wires in the braided layer. A braided flexible hose in which a strip is attached linearly along the axial direction of the hose. 2. A braided flexible hose comprising a braided layer formed by braiding fiber yarns or metal wire yarns in a tubular shape with inner and outer layers of rubber or synthetic resin, wherein at least one or more metal wires are provided in the braided layer. The hose was curved with the strip attached linearly in the axial direction of the hose, and crimping metal fittings for fixing the ends of the metal strip were provided at both ends of the hose to keep the hose in a curved state. A braided flexible hose characterized by this.