JP4158560B2 - hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used as a flexible air conditioning hose, as well as connection hoses such as various blowers and supply / exhaust fans, in addition to a hose that guides particles and powders, a hose that guides liquid, etc. The present invention relates to a hose used for guiding gas, liquid, particles or powder. In addition, what guides gas, such as an air-conditioning hose and a connection hose, is generally called a duct.
[0002]
[Prior art]
If the duct which is an example of the said hose is demonstrated, this duct is not only lightweight and requires shape retaining property, but also preferably requires flexibility. As a conventional duct, a spiral-shaped duct is preferable. There is one in which a spiral hose is formed by bonding a synthetic resin coating film material to a core material (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-8-296888 (see FIG. 1)
[0004]
[Problems to be solved by the invention]
In the above-mentioned patent document, since the synthetic resin coating film material forms a flat wall both inside and outside, it cannot be said that the shape has the flexibility of the duct, and the material and thickness of the synthetic resin coating film material are large. It was influenced. By the way, considering the material and thickness so as to increase the flexibility, the shape retention of the duct will be reduced, and the flat wall as described above satisfies both flexibility and shape retention. It was difficult to make it. In order to increase flexibility, it is conceivable to make the wall a bellows structure. However, in the bellows structure, the inner surface of the duct cannot be made flat. There was room for. Further, although the cross-sectional shape of the core material is not shown in the above-mentioned patent document, many core materials have a square or circular cross-sectional shape, and such a square or circular core material has a maximum bending angle. It is difficult to secure a large size, and the duct cannot be used in a place where it is bent greatly, so that a separately formed duct must be used, which is disadvantageous in terms of workability and cost.
[0005]
In view of the above-mentioned situation, the present invention aims to provide a hose that is excellent in both flexibility and shape retention and that is advantageous in terms of workability and cost.
[0006]
[Means for Solving the Problems]
Hose of the present invention, configured for the above-mentioned problem solution, is almost trapezoidal or substantially triangular cross-sectional shape, yet the surface directed from the sides angle of the bottom surface to the top side by the curved surface recessed to the central portion Then , a reinforcing material made of a hard synthetic resin in which the angle of both side corners is set to be small is provided in a spiral shape so that the top portion is located on the outer side in the radial direction. A tape material made of synthetic resin is spirally packaged along the curved surface of the reinforcing material, and a covering portion is formed between the reinforcing materials that protrudes in a substantially arc shape toward the center of the spiral of the reinforcing material. as well as, it'll be fixed by melt or adhesive the tape material on the surface of the reinforcing member is provided with a hose body for covering the reinforcing member, set the inner diameter of the reinforcing member and the cover portion at substantially the same inner diameter to, in said reinforcing member and the hose body, substantially flat In is characterized in that the cross-sectional shape to form a generally circular hose inner surface.
As described above, by making the reinforcing material substantially trapezoidal or substantially triangular, a large maximum bending angle can be secured. This will be described with reference to FIGS. 11 (a) and 11 (b). FIG. 11A shows an inner portion of a hose in a state where a hose formed by covering a reinforcing material 2 having a triangular cross section with a tape material 3 is bent at a predetermined angle, and FIG. The inside part of the hose in the state where the hose formed by covering the reinforcing material 2K having a circular shape with the tape material 3 is bent at the same predetermined angle as in FIG. 11B is shown. Comparing the two, the distance S1 between the reinforcing members 2 and 2 in FIG. 11 (a) is larger than the distance S2 between the reinforcing members 2K and 2K in FIG. 11 (b), and the maximum bending angle is increased accordingly. There is an advantage that can be secured. In addition, by forming a covering portion that protrudes in a substantially arc shape on the center side of the hose between the reinforcing members, the arc-shaped covering portion can be easily folded, so that the flexibility can be sufficiently exhibited.
Also, by using a substantially trapezoidal or substantially triangular reinforcing material with a flat bottom surface, the gap generated between the reinforcing material and the covering portion can be reduced compared to circular and rectangular reinforcing materials. Can be made almost flat.
Moreover, by comprising the said covering member with a soft synthetic resin, it is easy to adjust to a hand compared with what was comprised with the hard synthetic resin.
The surface that faces the top side from the both side corners of the bottom surface of the reinforcing material constituting the inner surface of the hose is configured with a curved surface that is recessed toward the central side of the reinforcing material, and the angle of both side corners is set small, A tape material made of a soft synthetic resin is spirally packaged along the curved surface, and a covering portion is formed between the reinforcing materials so as to project in a substantially arc shape toward the center of the spiral of the reinforcing material. Thus, the gap generated between the corners on both sides of the bottom surface of the reinforcing material and the covering portion can be kept small.
[0007]
The tape material has a width of approximately one pitch extending between two reinforcing materials adjacent in the longitudinal direction of the hose body, and the tape material adjacent in the longitudinal direction of the hose body partially overlaps on the reinforcing material. By constructing the hose body by melting and bonding together, the impact force transmitted to the hose is good with the tape material on the reinforcing material that is almost twice as thick as the thickness of the tape material between the reinforcing materials. Can be absorbed into. In addition, since an unnecessarily thick portion, that is, a thickness between the reinforcing members is not unnecessarily increased, an increase in weight can be suppressed.
[0009]
When the dimension of the bottom surface of the reinforcing material in the hose axis direction is set smaller than the dimension of the covering portion located between the reinforcing materials in the hose axis direction, the flexibility of the hose can be improved. Moreover, when the dimension in the hose axis direction of the bottom surface of the reinforcing material is set larger than the dimension in the hose axis direction of the covering portion positioned between the reinforcing materials, the strength of the hose can be improved. If the dimension of the bottom surface of the reinforcing material in the hose axis direction is set to be the same as the dimension of the covering portion located between the reinforcing materials in the hose axis direction, the flexibility and strength of the hose Can be improved to the same extent.
[0011]
The reinforcing material is divided into two parts inside and outside in the hose radial direction, of which the outer part in the hose radial direction is made of hard synthetic resin and the remaining inner part in the hose radial direction is made of soft synthetic resin. While the hose strength can be maintained as desired at the outer portion formed of resin, the flexibility of the hose can be increased as compared with the case where all of the hose is formed of hard synthetic resin.
[0012]
It is preferable that the tape material is EVA resin and the reinforcing material is polyethylene. When the tape material is composed of EVA resin, the transparency is high, and the flow of fluid such as internal air, granules, and powder can be confirmed. In addition, these EVA resins and polyethylene have little ash during incineration, do not generate toxic gas, and can be easily incinerated. Moreover, the material used in the hose of the existing product is PVC, and the specific gravity of the PVC is about 1.3. Compared with that, the specific gravity of EVA resin and polyethylene is 0.9, which is 30% of PVC. Can be lightweight. Moreover, in EVA of Shore D 40-50, although it was thought that it was unsuitable for what forms such a hose by winding, the hose (hose) excellent in flexibility by the structure of this invention of this application Could be manufactured.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an air-conditioning hose (a hose generally used for air-conditioning is called a duct). This hose is used for air-conditioning, as well as gases such as various blowers and supply / exhaust fans. In addition to being usable as a duct (connecting hose) for guiding the liquid, any material may be used as long as it is used for guiding liquids, granules, powders, and the like. The hose of the present invention can be used particularly effectively when it is lightweight and requires shape retention and flexibility.
[0014]
As shown in FIGS. 1 and 2, the hose is manufactured by the hose forming apparatus shown in FIG. 3, and the hose forming apparatus is a homer 1 that is a driving rotating body that is driven to rotate in the direction of arrow A in the figure. The homer 1 is provided with two extruders 4 and 5 for extruding the reinforcing material 2 and the tape material 3 constituting the hose body. Accordingly, the reinforcement material 2 is extruded on the homer 1 by the extruder 4 and spirally wound and moved sequentially in the direction of the arrow B in the figure. The reinforcement material 2 is adjacent to the reinforcement material 2 in a predetermined width (here, the hose axis direction). The molten tape material 3 having a length corresponding to one pitch over the two reinforcing materials 2 (or other lengths) may be sent out to the center side of the hose between the reinforcing materials 2 and 2. The inner surface is almost flat and the cross-sectional shape is almost circular by melting and bonding to the two inclined surfaces 2a and 2b of the reinforcing member 2 while forming the covering portion 3A that protrudes in a substantially arc shape on the inner side in the hose radial direction. The hose body can be configured.
As shown in FIG. 2 and FIG. 4, the slope 2a is formed by overlapping the ends of the tape material 3 placed on the reinforcing material 2, that is, on the two slopes (surfaces) 2a and 2b of the reinforcing material 2. , 2b may be configured so that the thickness of the tape material 3 is approximately twice the thickness of the covering portion 3A. With such a configuration, the impact force transmitted to the reinforcing material 2 can be satisfactorily absorbed by the tape material 3 having a substantially double thickness. You may comprise so that it may become the same thickness in any site | part by making the thickness of both ends of about half of other parts.
[0015]
The reinforcing material 2 is made of hard polyethylene (other material may be used as long as it is a hard synthetic resin), and the bottom surface (the surface on the side constituting the inner surface of the hose) 2C is flat (flat). As shown in FIGS. 1 and 2, the outer shape in the longitudinal direction, that is, the outer shape in a cross section cut in the longitudinal direction of the hose is substantially triangular, but may be formed in a substantially trapezoidal shape. The triangular shape is more preferable than the one because it has the advantage that the maximum bending angle can be increased.
Although the corners 2A and 2B on both sides of the bottom surface of the reinforcing member 2 have arc shapes with no corners, they may be configured with relatively sharp corners as shown in FIG. In this case, by forming the slopes 2a and 2b from the both side corners 2A and 2B toward the top 2D side into curved surfaces along the covering portion 3A projecting in an arc shape, the both side corners 2A and 2B and the covering portion 3A are formed. It may be possible to suppress a gap generated between the two. Other configurations not described in FIG. 5 are the same as those in FIG.
[0016]
The tape material 3 is preferably an EVA resin (ethylene-vinyl acetate copolymer) which is a soft resin, but various synthetic resins can be used as long as they are soft resins. Then, by extruding the molten tape material 3 from the extruder 5 onto the upper surface of the reinforcing material 2 and melt-bonding it to the two surfaces 2a and 3b of the reinforcing material 2, while forming the covering portion 3A by its own weight The hose can be configured. The curvature radius of the curvature of the covering portion 3A is the tension applied between the reinforcing members 2 and 2 of the tape member 3, the pitch between the reinforcing members 2 and 2, the weight of the tape member 3 between the reinforcing members 2 and 2, and the tape member 3 The size and shape of the space vary depending on the thickness of the material and the size and shape of the reinforcing material 2. Here, the tape material 3 is melt bonded to the reinforcing material 2, but the tape material 3 can be fixed to the reinforcing material 2 with an adhesive.
[0017]
As shown in FIGS. 6 and 7, the shape of the top of the reinforcing member 2 having a substantially triangular cross section shown in FIG. 5 may be a shape that protrudes in an arc shape outward in the radial direction of the hose. Further, the cross-sectional shape of the reinforcing material 2 may be set so that the dimension in the hose axial direction gradually decreases from the bottom surface 2C to the top 2D of the reinforcing material 2, and the cross-sectional shape shown in FIG. Although the cross-sectional shape may be a semicircular shape, it is advantageous in terms of light weight and flexibility to make the top portion 2D the thinnest like a triangle.
[0018]
As shown in FIGS. 7 and 8, the hose is provided with a coating layer 6 by covering the bottom surface 2C of the reinforcing material 2 and the inner surface of the covering portion 3A with a soft resin having a hardness smaller than that of the tape material 3. By doing so, the hose inner surface 6A is configured to be substantially flat. The coating layer 6 is preferably formed as thin as possible. For example, the maximum thickness portion is 0.6 mm to 2.0 mm, and the minimum thickness portion is preferably set to 0.2 mm to 0.8 mm. 7 and 8, the inner surface 6A of the hose is configured to be substantially flat by filling the bottom surface 2C of the reinforcing material 2 and the inner surface of the covering portion 3A with a soft resin, but the hardness is smaller than that of the tape material 3. 1 is wound around the homer 1 shown in FIG. 1 and, as shown in FIG. 9, the reinforcing material 2 and the tape material 3 are supplied from above the cylindrical member 7 to form a hose. Since the gaps H and H are generated between both sides of the covering portion 3A in the axial direction of the hose and the portions of the cylindrical member 7 corresponding thereto, it is more flexible than the hose shown in FIGS. Is advantageous. The soft synthetic resin forming the coating layer 6 is preferably a soft material having a hardness of about 55 to 65 defined by JIS A. Specifically, it is preferable to use EPM (ethylene-propylene copolymer rubber) as the type of synthetic resin.
[0019]
2 and 8, the dimension 2P in the hose axis direction of the bottom surface 2C of the reinforcing material 2 is set to be smaller than the dimension 3P in the hose axis direction of the covering portion 3A located between the reinforcing materials 2 and 2. 6 to 7, the dimension 2P of the bottom surface 2C of the reinforcing member 2 in the hose axis direction is larger than the dimension 3P of the covering portion 3A located between the reinforcing members 2 and 2 in the hose axis direction. In FIG. 8, the dimension 2P in the hose axis direction of the bottom surface 2C of the reinforcing member 2 is the same as the dimension 3P in the hose axis direction of the covering portion 3A located between the reinforcing members 2 and 2. However, the present invention is not limited to the dimensions shown in the figure.
[0020]
As shown in FIG. 10, you may comprise a hose. That is, the reinforcing material 1 shown in FIG. 5 is divided into two parts inside and outside in the hose radial direction, of which the hose radial direction outer portion 2X is made of hard synthetic resin and the remaining hose radial direction inner portion 2Y is made of soft synthetic resin. Thus, while maintaining the desired strength of the hose at the hard outer portion 2X, it is easy to deform at the corners 2A, 2B that are extended to both sides of the bottom surface of the reinforcing material 2 and fused with the tape material 3, The hose flexibility can be suppressed as much as possible. Two extruders for extruding the hard synthetic resin and the soft synthetic resin are provided, and the synthetic resin extruded from the extruder is integrated into the reinforcing material 2 to be sent out to the homer. The material 3 may be wound to form a hose, or the previously formed reinforcing material 2 may be sent out, and the tape material 3 may be wound thereon to form the hose.
[0021]
【The invention's effect】
By making the reinforcing material into a substantially trapezoidal shape or a substantially triangular shape with a flat bottom surface, it is possible to reduce the weight as compared with those using a circular or square reinforcing material, and to ensure a large maximum bending angle. Not only can the gap generated between the reinforcing material and the cover be reduced compared to a circular or square reinforcing material, the inner surface can be made almost flat, and construction can be performed at any angle. The hose (also referred to as a duct) particularly suitable for air conditioning can be provided while being advantageous in terms of both weight reduction and cost while being advantageous in terms of construction. In addition, by forming a covering portion that protrudes in a substantially arc shape on the center side of the hose between the reinforcing members, the arc-shaped covering portion can be easily folded, so that there is an advantage that the flexibility can be sufficiently exhibited. .
Further, by forming the covering member with a soft synthetic resin, it is easier to get familiar with the hand than with a hard synthetic resin, which is advantageous in terms of handling.
Furthermore, the surface of the bottom surface of the reinforcing material constituting the inner surface of the hose that faces from the side corners to the top side is formed by a curved surface that is recessed toward the center side of the reinforcing material, and the angle of the side corners is set small. Therefore, a covering material is provided in which a tape material made of a soft synthetic resin is spirally wound along the curved surface, and the tape material projects between the reinforcing materials in a substantially arc shape toward the center of the reinforcing material spiral. The gap generated between the corners on both sides of the bottom surface of the reinforcing material and the covering portion can be kept small, and not only can the flow resistance of the air be reduced, but also dust such as Troubles such as foreign matter staying can be avoided.
[0022]
The tape material has a width of approximately 1 pitch between two reinforcing materials adjacent in the longitudinal direction of the hose body, and the tape material adjacent in the longitudinal direction of the hose body partially overlaps on the reinforcing material. By configuring the hose body by melt bonding, the impact force transmitted to the hose is improved with the tape material on the reinforcing material that is almost twice as thick as the thickness of the tape material between the reinforcing materials. It can be absorbed and durability can be improved while suppressing an increase in weight.
[0024]
When the dimension of the bottom surface of the reinforcing material in the hose axis direction is set to be smaller than the dimension of the covering portion located between the reinforcing materials in the hose axis direction, it is particularly suitable for use in locations where flexibility is required. The hose can be constructed, and the strength in the hose axis direction of the bottom surface of the reinforcing material is particularly strong when the dimension of the covering portion located between the reinforcing materials is set larger than the dimension in the hose axis direction. A hose suitable for use in locations where a hose is necessary can be configured, and the dimension of the hose axis direction of the bottom surface of the reinforcing material is the same as the dimension of the hose axis direction of the covering portion located between the reinforcing materials. When set to, a hose suitable for use in a place where both the flexibility and strength of the hose are required to the same extent can be configured.
[0026]
The reinforcing material is divided into two parts inside and outside in the hose radial direction, of which the outer part in the hose radial direction is made of hard synthetic resin and the remaining inner part in the hose radial direction is made of soft synthetic resin. While the hose strength can be maintained as desired at the outer part formed in the above, the hose flexibility can be increased compared to the case where all of the hose is formed of a hard synthetic resin. A high hose can be obtained.
[0027]
When the tape material is made of EVA resin, the transparency is high, and it is possible to check the flow of fluid such as internal air, granules, powder, etc., and to check the adhesion of foreign matters such as dust and the degree of contamination. . Further, these EVA resins and polyethylene have less ash during incineration, do not generate toxic gas, can be easily incinerated, and are advantageous in terms of environment.
[Brief description of the drawings]
FIG. 1 is a side view of a part of a hose.
FIG. 2 is an end view showing an upper portion of a hose.
FIG. 3 is a side view showing a state in which a hose is manufactured by a hose forming apparatus.
FIG. 4 is an explanatory view showing a cross-section in a state where a tape material is being fed to a reinforcing material fed out in a spiral shape.
FIG. 5 is an end view showing an upper portion of a hose made of a reinforcing material of another shape.
FIG. 6 is an end view showing an upper portion of a hose made of a reinforcing material of another shape with a slightly rounded top.
FIG. 7 is an end view showing an upper portion of a hose having a flat inner surface with a coding layer on the inner surface.
8 is an end view showing an upper portion of a hose configured in a shape different from that of the reinforcing material shown in FIG.
FIG. 9 is an end view showing an upper portion of a hose having an inner surface provided with a cylindrical member and configured to have a flat inner surface.
FIG. 10 is an end view showing an upper portion of a hose made of a reinforcing material divided and formed from resins having different hardnesses in the radial direction.
11A and 11B are cross-sectional views of an inner portion of a hose bent at the same angle, FIG. 11A shows a case where the cross-sectional shape of the reinforcing material is a triangle, and FIG. 11B shows a case where the cross-sectional shape of the reinforcing material is a circular shape. Show.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Homer 2 Reinforcement material 2D Top part 2K Reinforcement material 2X Outer part 2Y Inner part 3 Tape material 3A Covering part 4 Extruder 2A, 2B Slope 2a, 2b Slope 2A, 2B Both sides corner 5 Extruder 6 Coding layer 6A Hose inner surface A Arrow B Mark S1, S2 Distance

Claims (7)

Sectional surface shape substantially trapezoidal or substantially triangular shape, yet constitute a surface extending from the sides angle of the bottom surface to the top side by the curved surface recessed to the central portion, a hard synthetic set small angle of both side corners a reinforcing material made of a resin, provided spirally as the top portion is located radially outward,
A tape material made of a soft synthetic resin is externally wound along the curved surface of the reinforcing material on the outer peripheral side along the spiral of the reinforcing material, and the reinforcing material spirals between the reinforcing materials. to form a covering portion that protrudes substantially in an arc shape toward the center, I'll be fixed by melt or adhesive the tape material on the surface of the reinforcement, the hose body for covering the reinforcing member is provided for,
The inner diameter of the reinforcing member and the covering portion was set to substantially the same inner diameter, and the reinforcing member and the hose body formed a hose inner surface having a substantially flat cross-sectional shape ,
A hose characterized by that.   The tape material has a width of approximately one pitch extending between two reinforcing materials adjacent in the longitudinal direction of the hose body, and the tape material adjacent in the longitudinal direction of the hose body partially overlaps on the reinforcing material. The hose according to claim 1, wherein the hose body is constituted by being melt bonded.   The hose according to claim 1, wherein a dimension of the bottom surface of the reinforcing material in the hose axial direction is set smaller than a dimension of the covering portion positioned between the reinforcing materials in the hose axial direction.   The hose according to claim 1, wherein a dimension of the bottom surface of the reinforcing material in the hose axial direction is set to be larger than a dimension of the covering portion positioned between the reinforcing materials in the hose axial direction.   The hose according to claim 1, wherein the dimension of the bottom surface of the reinforcing material in the hose axial direction is set to be the same as the dimension of the covering portion positioned between the reinforcing materials in the hose axial direction.   The reinforcing material is divided into two parts inside and outside in the hose radial direction, and the outer part in the hose radial direction is made of a hard synthetic resin, and the remaining inner part in the hose radial direction is made of a soft synthetic resin. The hose described. The hose according to any one of claims 1 to 5 , wherein the tape material is EVA resin and the reinforcing material is polyethylene.

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