FR2856464A1 - Vibration absorbing hose for motor vehicle, has longitudinally oriented reinforcing yarns braided along tubular rubber layer corrugated portions to form pressure resistant reinforcement layer shaped relative to corrugations - Google Patents

Abstract

The hose has a pressure resistant reinforcement layer with longitudinally oriented reinforcement yarns provided along corrugated portion (12) of a tubular rubber layer (16). The reinforcing yarns are braided along the corrugated portion to form the pressure resistant reinforcement layer shaped corresponding to the corrugated portion. The reinforcement layer is laminated on an outer surface side of the rubber layer.

Description

The present invention relates to a flexible

  vibration absorbing, more specifically a vibration absorbing hose which has excellent resistance to pressure and which is adapted to serve as piping in an engine compartment of a motor vehicle.

  In the past, tubular rubber hose made mainly of elastic rubber material has been widely used in various piping or tubing means for industrial and automotive applications. Since such a rubber hose has an excellent vibration absorbing property, it is often arranged in vibration zones in order to prevent transmission of vibrations.

  For example, in the case of a pipe hose such as a hose for a fuel system or a refrigerant transport hose (air conditioner hose) used in an engine compartment 20 of a motor vehicle, the hose channeling serves to absorb engine vibration, air conditioning compressor vibration and other various vibrations generated while driving a vehicle, and to prevent transmission of vibration from a first member to a others which are connected via the hose.

  Likewise, whether for industrial or automotive applications, hoses for an oil system, a fuel system, a water system and a refrigerant system are formed in a multilayer construction comprising a rubber layer. inner, an outer rubber layer and a reinforcing layer interposed between the inner and outer rubber layers, for example as described in Patent 1 below. The reinforcing layer is typically constructed by arranging or braiding reinforcing threads.

  Figure 30 shows the construction of a refrigerant transport hose (air conditioner hose) which is described in JP A 7-68659. The refrigerant transport hose has a multi-layer construction.

  Reference numeral 200 in FIG. 30 indicates a layer of tubular inner rubber. An inner layer of resin 202 is formed or laminated in an inner side of the inner rubber layer 200.

  And a first reinforcing layer 204 is formed or laminated on an outer side of the inner rubber layer 200, and a second reinforcing layer 206 is formed or laminated on an outer side of the first reinforcing layer 204, a layer of intermediate rubber 208 intervening between the first and second reinforcing layers 204, 206. The first reinforcing layer 204 is formed by winding one or more reinforcing threads in a spiral, while the second reinforcing layer 206 is formed by winding one or more reinforcing wires spiraling in the opposite direction to the winding direction of the first reinforcing layer 204. In addition, an outer rubber layer 210 is formed or laminated on an outer side of the second reinforcing layer 206 in as the outermost layer which serves as a covering layer.

  In this example, the reinforcing layers 204, 206 are formed by arranging or winding reinforcing wires in a spiral. On the other hand, such a reinforcing layer is also formed in the same way by braiding or braiding weaving of reinforcing threads. Figure 31 shows an Example of a hose having such a braided reinforcing layer. Reference numeral 212 in FIG. 31 indicates a reinforcing layer which is formed by braiding reinforcing threads between the inner rubber layer 200 and the outer rubber layer 210. In this example, the inner resin layer 202 is also formed in an inner side of the inner rubber layer 200.

  As noted from these Examples, all of the usual hoses that have been provided with a reinforcing layer therein are formed into a straight-sided or straight-walled tube having interior side surfaces and outer which are rectilinear in a longitudinal direction. At the same time, in the case of such a straight side tubular hose, the hose needs to be designed to have a length depending on the rigidity of the hose, in order to guarantee a favorable vibration absorption property.

  In particular, compared to low pressure hoses for a fuel system, a water system or the like, a longer length is required for high pressure hoses such as those of an oil system (e.g. , power steering system) or a refrigerant system (refrigerant transport system), in order to ensure a sufficient vibration absorbing property and to reduce the transmission of noise and vibration to the interior of the vehicle, with corresponding increases in hose stiffness. For example, in the case of a refrigerant transport hose, the hose with a length of 300 nmm to 600 mmn is typically adapted to guarantee a vibration absorption property and reduce the transmission of noise and vibrations, even for piping or piping over a direct distance of 200 mm.

  However, an engine compartment is cluttered with different components and different parts. And currently, specifically, because of the need to ensure as large a compartment space as possible, an engine compartment has been designed in a compact size, and a space or clearance in the engine compartment has been increasingly more shrunk. Therefore, in these circumstances, if a long hose is arranged in the engine compartment, this requires a design engineer to design a pipeline arrangement to avoid interference with other components or parts, and an operator handling the hose when arranging the hose in the engine compartment. In addition, consideration should be given to a pipe design and handling of the hose according to the types of a motor vehicle. This results in excessive workload when mounting and assembling vehicle parts and components.

  Due to the foregoing aspects, there is a demand to develop a rubber hose (hose of elastic rubber material) whose properties such as the vibration absorption property are improved. One of the first ways to design the hose at a short length without loss of favorable vibration absorption property is to provide the hose with corrugations. US Patent 6,279,615 describes a fuel hose (a hose for a fuel system) of the motor vehicle which is provided with corrugations.

  Figure 32 is a view for explaining the fuel hose described in this US Patent. In FIG. 32, the reference numeral 214 indicates a layer of tubular rubber, and the reference numeral 216 indicates an inner layer of resin which is formed in the inner surface of the rubber layer 214. As shown in FIG. 32, the fuel hose is provided with a corrugated portion 218. Therefore, in this fuel hose, it is possible to absorb vibrations generated effectively, due to the flexibility of the corrugated portion 218, despite the short length of the fuel hose.

  At the same time, just by providing the hose with a corrugated portion 218 as shown in Figure 2, flexibility can be obtained, but sufficient resistance to pressure cannot be guaranteed.

  That is, the hose of the description is called a filling hose, and is adapted to a fuel filling opening. Therefore, pressure resistance is not specifically required for the hose of the description. The construction of the hose shown in Figures 32, where the burst pressure is less than 1 MPa, can be adapted to a low pressure hose such as a filling hose, but cannot be adapted without modification to a hose for which resistance to high pressure is required.

  First means for providing a hose having such a corrugated part or such corrugations with resistance to pressure may consist in forming on the hose a reinforcing layer which has a considerable reinforcing effect. The reinforcing layer should not diminish the flexibility that the corrugations inherently have, and should be easily and favorably formed on the outer surface side of the rubber layer.

  In the circumstances described above, it is an object of the present invention to provide a new vibration absorbing hose which has excellent resistance to pressure, and which does not lose sufficient vibration absorbing property. 'it is formed to a short length.

  According to the present invention there is provided a vibration absorbing hose which comprises a layer of tubular rubber (layer of elastic rubber material) having corrugations (e.g. a corrugated part), and a pressure resistant reinforcing layer laminated to an outer surface side of the rubber layer. The pressure-resistant reinforcing layer is laminated, for example, in a close contact relationship with the corrugations of the rubber layer along an entire length thereof. The pressure-resistant reinforcing layer is formed in a shape which corresponds to the corrugations, for example comprising one or more reinforcing threads arranged for example by being intertwined, woven, wound or spiraled along the corrugations. Here, for example, the pressure-resistant reinforcing layer is gradually laminated on the corrugations by arranging the reinforcing thread (s) along the corrugations. Such a pressure-resistant reinforcing layer can be applied as having one or more reinforcing threads knitted along the corrugations or wound in a spiral along the corrugations to form a layer having a shape which corresponds to the corrugations. However, it is preferred to use the pressure resistant reinforcing layer having the reinforcing wires braided along the corrugations to form a layer having a shape which corresponds to the corrugations. In other words, the means can be applied to form the pressure-resistant reinforcing layer by braiding the reinforcing threads along the corrugations. Furthermore, it is effective to laminate a cover layer on an outer surface side of the pressure-resistant reinforcing layer. Here, the covering layer may preferably be formed from a layer made of rubber or an outer layer made of rubber (layer made of elastic rubber material or outer layer made of elastic rubber material).

  According to the present invention, the corrugations guarantee a favorable flexibility of the vibration absorption hose. Thus, if the hose is formed to a short length, a favorable vibration absorption property is obtained. That is, the present invention allows a relatively short or short required hose length, while ensuring a favorable vibration absorption property of the hose. This solves underlying problems associated with a specifically arranged pipeline hose in the engine compartment of a motor vehicle for which pressure resistance is required, such as pipeline design or handling hose during an assembly task. In addition, by achieving a short length of hose required, another benefit can be obtained which is a high degree of design freedom.

  In the present invention, for example, as the pressure-resistant reinforcing layer com25 carries one or more reinforcing wires arranged along the corrugations to form a layer having a shape which corresponds to the corrugations, the vibration absorbing hose can have a favorable or uniform pressure resistance. The present invention can guarantee flexible hose absorption and excellent resistance to pressure.

  According to the present invention, the pressure-resistant reinforcing layer is laminated by arranging the reinforcing thread (s) along the corrugations to form a layer having a shape which corresponds to the corrugations. Thus, for example, peaks and wavy valleys are easily reinforced in a uniform manner. Or for example all the corrugations are easily reinforced in a uniform manner. And at the same time, there is not the problem that the pressure-resistant reinforcing layer considerably impairs the flexibility from the corrugations. Furthermore, according to one aspect of the present invention, the pressure-resistant reinforcing layer can be constructed easily during the manufacture of a vibration absorbing hose, and therefore the production cost of the hose can be lowered.

  It is desired to arrange, for example braiding the reinforcing thread (s) at an agency angle (for example an angle at which the reinforcing thread (s) are arranged relative to the longitudinal direction), for example a braiding angle, generally equal in the wavy peaks and valleys or between the wavy peaks and valleys, for example during braiding, by controlling the speed of traction of the reinforcing threads at the braiding machine. If an arrangement angle, for example a braiding angle, is greater than a neutral angle (54,44), the vibration absorption hose tends to be lengthened in a longitudinal direction of the hose when internal pressure is exerted on it. On the contrary, if the arrangement angle, for example the braiding angle, is smaller than the neutral angle, the vibration absorption hose tends to expand in a radial direction. That is to say that the vibration absorption hose behaves according to the arrangement angle, for example the braiding angle, when an internal pressure is exerted on it. Thus, unless the arrangement angle, for example the very correct angle, is equal in the ripple peaks and valleys, or between the ripple peaks and valleys, such as the absorption hose of vibration behaves differently in peaks and valleys of ripple while it is subjected to the operation, it is to be feared that the resistance to pressure will be reduced.

  The pressure-resistant reinforcing layer formed by winding the spiral reinforcing threads can be constructed from a first reinforcing layer formed by winding one or more reinforcing threads in a first direction, and a second layer reinforcement formed by winding one or more reinforcing threads in the opposite direction to the winding direction of the first reinforcing layer. The pressure-resistant reinforcing layer 15 can be formed by knitting the reinforcing thread (s) in either the circumferential or longitudinal directions, or by knitting so that the knitted loops continue in either 'other longitudinal or circumferential directions20. The pressure-resistant reinforcing layer knitted in either direction has excellent stretchability, and therefore has the characteristic of having flexibility of the vibration absorbing hose having undulations which do not 25 not decrease.

  Generally, the burst strength property of the hose is guaranteed by the pressure-resistant reinforcing layer which is laminated.

  However, if the pressure-resistant reinforcing layer has coarse meshes or open spaces between the threads, so that the inner rubber layer or the rubber layer can be seen through them, when internal pressure is exerted on the vibration absorbing hose, the rubber layer is inflated and deformed so as to fill coarse mesh or open spaces. As a result, there is a risk that pinholes may be caused or produced in the rubber layer. Such occurrence of pinholes results in bursting of the vibration absorbing hose. Therefore, the pressure-resistant reinforcing layer is formed by arranging the reinforcing thread (s) narrowly and tightly. Thus, a twisted number of the reinforcing wire is decreased, a number of wires is increased, or a thickness (diameter) of the reinforcing wire is increased to construct the pressure-resistant reinforcing layer, so that no not see the rubber layer through it. This means that the pressure-resistant reinforcement layer is preferably formed with tiny or crushed meshes or without open spaces between wires, so as not to allow the (inner) rubber layer to be deformed so as to fill them .

  In this way, while the pressure-resistant reinforcing layer is formed along the corrugations, i.e. so as to follow the corrugations of the rubber layer to ensure pressure resistance, the protective layer pressure-resistant reinforcement does not function sufficiently to prevent adjacent ripple peaks and adjacent ripple valleys from widening. Thus, if internal pressure is exerted on the vibration absorbing hose, the corrugations can be lengthened, and the vibration absorbing hose can be greatly extended and deformed. And if the vibration absorbing hose is extended and significantly deformed, there is a risk that the hose will come into contact with peripheral or similar parts and components in a pipeline path, and it may flow the vibration absorption hose is damaged, and its durability is reduced. It is also possible to adjust the stiffness and the wall thickness of the rubber layer to resolve a longitudinal change or elongation of the vibration absorption hose. However, considering the balance with flexibility so as not to interfere with the vibration absorbing property of the hose, it is preferred to provide another separate reinforcement layer in addition to the pressure resistant reinforcement layer so as to prevent the flexible to be elongated in its longitudinal direction. Thus, it is effective to laminate another separate reinforcement layer on an outer surface side of the pressure-resistant reinforcement layer, with a defined clearance at the positions of the corrugation valleys of the undulations between the reinforcement layer pressure-resistant and the other separate reinforcement layer. For example, the other separate reinforcement layer has a different construction and reinforcement property compared to the pressure-resistant reinforcement layer. Such a construction effectively prevents the vibration absorbing hose from being extended substantially in its longitudinal direction, resulting in a stopper or contact with peripheral parts and components or the like when internal pressure is exerted on this one. It is also effective to laminate a cover layer on one outer surface side of the other separate reinforcement layer. Here, preferably, the cover layer can be formed from an outer layer made of rubber.

  The other separate reinforcement layer can be formed by, for example, arranging the interwoven reinforcement wire (s), woven, wound or spooled. It is effective to arrange, for example, the braided reinforcing thread (s) at such a fixed angle (for example an angle at which the reinforcing thread (s) are arranged relative to the longitudinal direction), for example a braiding angle 5 making it difficult for a hose to be elongated in the longitudinal direction to prevent the vibration absorbing hose from being moved in its longitudinal direction. Consequently, in the other separate reinforcement layer, the fixed angle, for example the braiding anle adapted to arrange the reinforcement yarn (s), is a neutral or lower angle, more specifically between 30 and 54.44 (neutral angle).

  Alternatively, to prevent elongation of the vibration absorbing hose 15 in its longitudinal direction, the pressure-resistant reinforcing layer may be formed so as to have one or more longitudinally oriented reinforcing wires extending in one direction. longitudinal of the vibration absorption hose 20. The longitudinally oriented reinforcing thread (s) can be interleaved with the reinforcing thread (s) during the arrangement, for example braiding, of the reinforcing thread (s) to form the pressure-resistant reinforcing layer. In this construction, the longitudinally oriented reinforcing wire (s) and the reinforcing wire (s) are retained together, and this allows the pressure resistant reinforcing layer to effectively limit elongation and deformation on30 dulations.

  The corrugations (the corrugated part) can be formed in a wavy spiral pattern in which corrugation peaks and valleys are respectively continuous in a longitudinal direction of the vibration absorbing hose, and also in an annular wavy pattern wherein longitudinally adjacent ripple peaks and longitudinally adjacent ripple valleys are discontinuous and independent of each other. The vibration absorbing hose 5 having an annularly wavy pattern may further include a plurality of rigid annular stop rings which are individually arranged along a longitudinal direction of the vibration absorbing hose. The stop rings are arranged on an outer side of the pressure-resistant reinforcing layer in positions of the corrugation corrugation valleys, so as to radially stop the corrugation valleys or the resistive reinforcement layer. pressure, respectively. When the corrugations or the corrugated part are elongated in a longitudinal direction of the vibration absorption hose, the corrugation valleys enlarge diametrically while the opening angles widen, and the corrugation peaks contract also diamé20 trally while the opening angles widen. That is, the corrugated portion tends to be elongated in a longitudinal direction of the vibration absorbing hose with a diametrical enlargement of the corrugation valleys and a diametrical contraction of the corrugation peaks. Therefore, if the rigid stop rings are arranged on an outer side of the corrugation valleys, the corrugation valleys are retained against movement in a direction of diametrical enlargement by the stop rings , and the corrugated part is favorably prevented from being elongated and deformed. Since, for example, the stop rings not only completely prevent the corrugated part from being enlarged diametrically, but also share the load on the corrugated part when an internal pressure is exerted thereon, another effect is obtained which is that the pressure resistance of the vibration absorbing hose is further increased. However, if the stop rings are not applied, it is effective to provide the corrugation peaks with a substantial wall thickness, for example, as the corrugation valleys have a larger load support surface. or a diametrically enlarged load support surface, and are easily deformed compared to the corrugation valleys.

  A vibration absorbing hose according to the present invention may include a tubular rubber layer having corrugations, a reinforcing fabric which is wrapped around an outer surface side of the rubber layer, so as to constitute a layer pressure-resistant reinforcement in a layered relationship to the rubber layer, and a plurality of rigid annular stop rings which are arranged individually along a longitudinal direction of the viability absorption hose. The stop rings are arranged on an outer side of the reinforcing fabric in corrugated valley valleys positions, so as to stop the reinforcing fabric easily to form the pressure-resistant reinforcing layer having a shape which corresponds to the undulations. The reinforcing fabric can be formed for example by braiding or intertwining reinforcing warp threads and reinforcing weft threads. This construction makes it very easy to laminate the pressure-resistant reinforcement layer. And a torsional stress is not produced in the hose thus constructed when an internal pressure is exerted on it. The reinforcing fabric can be wrapped around the outer surface side of the rubber layer, so that the reinforcing warp threads are oriented in a longitudinal direction of the vibration absorbing hose. Here, the reinforcing warp threads prevent the vibration absorbing hose from being elongated in its longitudinal direction, while the reinforcing weft threads prevent the vibration absorbing hose from being inflated and deformed radially.

  In addition, a vibration absorbing hose according to the present invention may include a tubular rubber layer having corrugations, a reinforcing fabric which is spirally wound around an outer surface side of the rubber layer so providing a pressure-resistant reinforcing layer in a layered relationship with the rubber layer, and a plurality of rigid annular stop rings which are arranged individually along a longitudinal direction of the vibration absorbing hose . The stop rings can be arranged on an outer side of the reinforcement fabric in wave undulation valley positions, so as to radially stop the reinforcement fabric to form the pressure-resistant reinforcement layer having a shape which corresponds to the undulations. This construction also makes it possible to easily lay the pressure-resistant reinforcing layer. The reinforcing fabric can be formed for example by braiding or intertwining reinforcing warp threads and reinforcing weft threads. And the reinforcing fabric can be wrapped around the outer surface side of the rubber layer, so that the reinforcing warp threads and the reinforcing weft threads are oriented at an angle inclined with respect to a longitudinal direction of the vibration absorbing hose, respectively.

  Here, the pressure-resistant reinforcing layer formed by the reinforcing fabric and the rigid stop rings can provide the vibration-absorbing hose with favorable pressure resistance and deformation resistance properties. The corrugations of the vibration absorbing hose or the rubber layer can be formed such that adjacent corrugation peaks in a longitudinal direction of the vibration absorbing flexible and the adjacent corrugation valleys in its longitudinal direction are discontinuous and independent of each other. That is, according to one aspect of the present invention, the pressure-resistant reinforcing layer formed by the reinforcing fabric and the stop rings can withstand the load caused by internal pressure exerted on the hose. absorbing vibration, and thus the strength of pressure resistance and the deformation resistance property of the vibration absorbing hose can be improved. When the stop rings keep the corrugation valleys in a restrained state against movement in the diametrically enlarging direction, the corrugation peaks can be effectively prevented from being radially deformed, therefore for example 25 to expand radially.

  And a merit is obtained which is that the stop rings which are arranged from an outer side of the pressure-resistant reinforcing layer can be adapted as means of fixing the pressure-resistant reinforcing layer. As the stop rings are discontinuous and independent of each other in the longitudinal direction of the vibration absorbing hose, if one of the stop rings has to be broken, a stop or safety function of the flexible hose absorption of vibrations is for example only partially lost.

  The vibration absorbing hose may further include a resin membrane which is laminated in an inner surface of the rubber layer, or on an outer surface of the rubber layer and in an inner side of the resistant reinforcing layer with pressure. As in this construction, gas barrier performance is improved by the resin membrane, the gas penetration resistance of the vibration absorbing hose can be improved, for example, remarkably.

  The resin membrane can be formed by electrostatic coating or spraying.

  In the present invention, preferably, the resin membrane can be formed from a polyamide resin or a polyamide-type resin, or a fluorinated resin or a fluorine-type resin.

  The resin membrane can be formed in such a way that a negatively or positively charged resin powder is sprayed onto the rubber layer which acts as a counter electrode, the resin powder is fixed on the surface inside or outside of the rubber layer by electrostatic coating, and then the fixed resin powder is melted by heating, and cooled.

  However, there are certain means other than electrostatic coating for laminating the resin membrane in or on the rubber layer. The resin membrane can be formed in the inner surface or on the outer surface of the resin layer by injection molding. Alternatively, the resin membrane can be formed in such a way that a parison is formed by extruding a molten resin using an extruder, and the parison is fixed and laminated in the interior surface or on the outer surface of the rubber layer by extrusion blow molding.

  A wall thickness or a thickness of the resin membrane is preferably at most 0.3 mm or 300 µm. The reason is that when the wall thickness is greater, the vibration absorbing hose becomes completely hard or rigid, and the vibration absorbing property is deteriorated. However, in injection molding, it is difficult to form the resin membrane with a wall thickness of 0.3 mm or 300 µm or less. In extrusion blow molding, it is difficult to form the resin membrane with uniform thickness. By using electrostatic coating, it is possible to easily form the resin membrane with a thin and uniform wall thickness.

  However, in the present invention, the resin membrane more preferably has a thickness of 50 µm to 250 µm. If the resin membrane is less than 50 µm thick, insufficient resistance to gas penetration cannot be obtained. On the contrary, if the resin membrane has a thickness greater than 250 gm, the resistance to gas penetration is favorable, but the vibration absorption property of the hose is deteriorated as the resin membrane becomes hard or rigid depending on the conditions. circumstances.

  Here, to favorably form the resin membrane by electrostatic coating, the layer of caustic rubber is preferably formed to have a volume resistivity value or a volume resistivity of a maximum of i x 10 6 a-cm. The volume resistivity value in the rubber layer can be controlled by adjusting the amount of carbon black mixture in it. The rubber layer in which the volume resistivity value is adjusted to a maximum of ix 10 6 Q-cm in this way can result in a favorable electrostatic coating of resin powder, a limitation of defects such as a wall thickness irregular or pinholes, and a resistance favorable to the penetration of gases.

  It is effective to form the rubber layer so that it has a greater wall thickness in corrugation peaks of the corrugations than in their corrugation valleys. Ripple peaks define parts of large diameter, and gas therefore easily penetrates through them (for example, gas penetrates a lot of them). However, in this description, as the wall thickness of the corrugation peaks is increased, the gas penetration resistance of the hose can be effectively increased. On the contrary, the corrugation valleys define parts of small diameter, and consequently the gas hardly penetrates through it (for example, the gas penetrates very little there). Therefore, it is not necessary to design the corrugation valleys to have a wall thickness as large as the corrugation peaks. Also, if the wall thickness of the corrugation valleys is designed to be small, a hose can therefore be formed by not being hard enough. In addition, the ripple peaks are effectively prevented from being diametrically contracted and deformed when internal pressure is exerted thereon, and thus further the vibration absorption hose is prevented from being deformed in a longitudinal direction of it. The wall thickness of the corrugation peaks is preferably designed to be 1.2 to 6 times as great as that of the corrugation valleys. If the wall thickness in the wave peaks is less than 1.2 times that of the wave valleys, the resistance to gas penetration can be lowered in the wave peaks. If it is more than 6 times that of the corrugation valleys, too great a wall thickness in the peaks of undulations can reduce the flexibility of the vibration absorption hose. More specifically, it is effective for the wall thickness in the ripple peaks to be designed to be 1.5 to 3 times as large as that in the ripple valleys.

  According to the present invention there is provided a vibration absorbing hose having sufficient flexibility, and a burst pressure of a minimum of 1 MPa. The vibration absorbing hose of the present invention is particularly suitable for a pipeline application in an engine compartment of a motor vehicle having a construction which is adapted so that a pipeline flexible is arranged in an engine compartment 'a motor vehicle.

  The present invention will now be described with reference to the accompanying drawings, in which: - Figure 1 is a partially cutaway perspective view of a first vibration absorbing hose according to the present invention, - Figure 2 is a sectional view of the first vibration absorbing hose, - Figure 3 is an explanatory view of a significant part of a first method of producing the first vibration absorbing hose, - Figure 4 is a perspective partially torn away from a second vibration absorption hose according to the present invention, FIG. 5 is a sectional view of the second vibration absorption hose, taken along a longitudinal direction thereof, - Figure 6 is a sectional view of the second vibration absorbing hose, taken along a radial direction thereof, - Figure 7 is an explanatory view representing a property measurement method of vibration absorption of a Hose Example and Comparative Example of hose with measuring equipment, - Figure 8 is a graph showing vibration absorption properties of the first vibration absorption hose 10 obtained by means of the measurement method of FIG. 7, - FIG. 9 is a perspective view partially cut away of a third vibration absorption hose according to the present invention, - FIG. 10 is a sectional view of the third vibration absorbing hose, taken along a longitudinal direction thereof, - Figure 11 is a sectional view of the third vibration absorbing hose, taken along a radial direction thereof ci, - Figure 12 (a) is a view showing a state of a corrugated part of the third vibration absorption hose which is neither elongated nor deformed, - Figure 12 (b) is a view showing a state of the wavy part of the third vibration absorbing hose which is elongated and deformed due to internal pressure, Fig. 12 (c) is a view showing a state of a corrugated part of a Comparative Example which is elongated and deformed of the made of internal pressure, - Figure 12 (d) is a view showing a state of a corrugated part of another Comparative Example which is elongated and deformed due to internal pressure, - Figure 13 is a graph showing vibration absorption properties of the third vibration absorption hose obtained by the measurement method of FIG. 7, - FIG. 14 is a partially cut away perspective view of a fourth absorption hose of vibration according to the present invention with a reinforcing fabric, - Figure 15 is a sectional view of the fourth flexible vibration absorption, - Figure 16 (a) is an explanatory view of a significant part of the process for producing the fourth vibration absorbing hose, representing the formation of an inner rubber layer, - Figure 16 (b) is an explanatory view of a significant part of the process for producing the fourth vibration absorbing hose , describing the method of laminating the pressure-resistant reinforcing layer, - Figure 16 (c) is an explanatory view of a significant part of a process for producing the fourth vibration absorbing hose, showing that stop rings are arranged thereon, - Figure 17 is an explanatory view of a significant part of a production process different from that of Figure 16, - Figure 18 is an explanatory view of a significant part of another process for producing the fourth vibration absorption hose, - Figure 19 is a graph showing vibration absorption properties of the fourth vibration absorption hose ations obtained by means of the measurement method of FIG. 7, - FIG. 20 is a partially cut away perspective view of a fifth vibration absorption hose according to the present invention, - FIG. 21 is a sectional view of the fifth vibration absorption hose, taken along a longitudinal direction thereof, - Figure 22 is a sectional view of the fifth vibration absorption hose, taken along a radial direction of this, - Figure 23 (a) is an explanatory view of a method of forming a resin membrane in the fifth vibration absorbing hose, showing that an adhesive agent is applied, - Figure 23 (b) is an explanatory view of a method of forming the resin membrane in the fifth vibration absorbing hose, showing that a resin powder is sprayed, - Figure 23 (c) is an explanatory view of a process for forming the membrane in resin in the fifth vibration absorbing hose, showing that the resin membrane is laminated, - Figure 24 is a view showing a method of measuring gas penetration resistance properties of Examples of the fifth flexible vibration absorption and Comparative Examples, in order to confirm the effects of the fifth vibration absorption hose, - Figure 25 is a sectional view of another embodiment of the fifth vibration absorption hose, Figure 26 is a partially cutaway perspective view of a sixth vibration absorbing hose according to the present invention, Figure 27 is a sectional view of the sixth vibration absorbing hose, - Figure 28 is a view showing a method of measuring the amount of refrigerant penetration of Examples of the sixth vibration absorption hose and a Comparative Example in order to confirm the effects of the sixth me vibration absorbing hose, - Figure 29 is a view showing a flexibility measurement method of the Examples of the sixth vibration absorbing hose and the Comparative Example, in order to confirm the effects of the sixth flexible hose 10 of vibration absorption, - Figure 30 is a perspective view of one of the usual vibration absorption hoses, - Figure 31 is a perspective view of another usual vibration absorption hose having a layer of braided reinforcement, and FIG. 32 is a sectional view of a vibration absorption hose which is different from the usual vibration absorption tubes of FIGS. 30 and 31.

  Now, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  A first vibration absorption hose (simply indicated hereinafter first hose 10) according to the present invention shown in FIGS. 1 and 2, which is applied for example as a refrigerant transport hose (air conditioning hose), has pressure resistance. The first hose 10 has a corrugated portion 12 extending over a relatively long distance, or over an almost entire portion of the first hose 10, and end portions 14, 14 of a straight side tubular shape or a straight cylindrical shape. The first hose 10 has a multilayer construction, a layer of tubular inner rubber (inner layer of elastic rubber material) 16 (rubber layer), a pressure-resistant reinforcing layer 18 which surrounds an outer side of the inner layer inner rubber 16, and an outer rubber layer (outer layer 5 of elastic rubber material) 20 as the outermost cover layer.

  In the first hose 10, the pressure-resistant reinforcing layer 18 is formed or constructed by braiding reinforcing yarns or a filament element 10 (see Figure 3) on and along an outer surface of the inner tubular rubber layer 16, more specifically along the straight cylindrical shape of the two end portions 14, 14, and the corrugations therebetween. Therefore, the pressure-resistant reinforcing layer 18 is formed in a straight cylindrical shape at the two end portions 14, 14, and in a shape which corresponds to the corrugations or in a corrugated shape having for example peaks corrugation 20 and corrugation valleys in the corrugated portion 12 between the two end portions 14, 14. The pressure-resistant reinforcing layer 18 is laminated on an outer side of the inner rubber layer 16 entirely in a contact or close contact relationship with the outer surface thereof.

  The inner rubber layer 16 located in the first hose 10 can be formed from isobutylene-isopropene rubber (IIR), halogenated IIR (chloro-IIR (Cl-IIR or CIIR), bromo-IIR (Br-IIR or 30 BIRR )), acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene-diene rubber (EPDM), ethylene-propylene copolymer (EPM), fluorocarbon (FKM), rubber epichlorohydrin or a copolymer of ethylene oxide (ECO), silicone rubber, urethane rubber, acrylic rubber or the like. These materials are applied in a single or mixed form for the inner rubber layer 16.

  For the reinforcing threads or the filament element 22 forming the pressure-resistant reinforcing layer 18, polyethylene terephthalate (PET), polyethylenenaphthalate (PEN), aramid, polyamide or nylon can be adapted. (registered trade name) (PA), Vynilon (registered trade name), rayon, metal wire or the like.

  The outer rubber layer 20 can also be formed from any type of rubber material mentioned above as a material for the inner rubber layer 16. In addition, a heat-shrinkable tube 15 and a tube made of thermoplastic elastomer (TPE) ) can also be applied for the outer rubber layer 20. With regard to the material of such a heat-shrinkable tube and of such a TPE tube, an acrylic type material, styrene type material, type olefin, diolefin type, polyvinyl chloride type, urethane type, ester type, amide type, fluorine type or the like. According to this embodiment, the first hose 10 is designed to have an internal diameter of approximately 5 mm to 50 mm.

  The inner rubber layer 16 is formed, for example, from a material selected in a suitable manner according to a fluid circulating inside it. However, in the case where the first hose 30 is applied for a hydrofluorocarbon (HFC) type refrigerant transport hose, it is preferably possible to specifically use IIR or halogenated IIR in a single or mixed form. It is also effective to apply IIR or halogenated IIR in a single or mixed form on the outer rubber layer 20.

  The first hose 10 as shown in Figures 1 and 2 can be manufactured for example in the following manner. First, the inner rubber layer 16 having a corrugated portion is formed by injection molding, blow molding or the like.

  The molded inner rubber layer 16 is slid over a long mandrel (for example, a resin mandrel) 23, as shown in Figure 3. Next, the mandrel 23 having the inner rubber layer 16 on it is mounted in a central hole of a braiding machine 24 shown in Figure 3. Then, the mandrel 23 is transported forward. The reinforcing threads 22 are braided on the outer surface of the inner rubber layer 16 when the mandrel 23 is transported.

  The braiding machine 24 has a disc-like plate 20 and a plurality of supports 26A and 26B put in pairs which are arranged along a circumference of the platinum plate 25. The supports 26A and 26B of each pair follow the figure of an eight, respectively, while the platinum plate 25 turns 25 around its center, and thus the reinforcing wires 22 are braided on the outer surface of the inner rubber layer 16. During a process of braiding, a speed of traction of the reinforcing threads 22 is controlled so that the braiding angle is generally equal in the undulations peaks and valleys of the corrugated part 12, between the undulations peaks and valleys, or d across the entire corrugated portion 12. Here, the reinforcing wire (s) 22 are braided tightly and intimately, so that the rubber layer 16 cannot be seen through .

  And the inner rubber layer 16, which is laminated with the pressure-resistant reinforcing layer 18 by braiding the reinforcing threads 22 on an outer surface thereof as established above, is then immersed in a liquid compound so that the outer rubber layer 20 is then coated, the outer rubber layer being on an outer side thereof. Then, the product laminated with the outer rubber layer 20 is put in a drying oven for drying.

  After drying, the mandrel 23 is removed, and an elongated multilayer hose product is obtained. Then, for example, the hose product is cut to a desired length, and thus the first hose 10 shown in Figures 1 and 2 is obtained. This is an Example of a method for producing the first hose 10. The first hose 10 can be produced by any other methods.

  The first hose 10 in the above-mentioned embodiment can guarantee a favorable flexibility of itself through the corrugated part 12. Consequently, if the first hose 10 is designed with a short length, a property favorable vibration absorption can be guaranteed in the first hose 10. This means that the first hose 10 guarantees a favorable vibration absorption property while the required hose length is shortened. This can solve the problem concerning the design of piping in an engine compartment 30 of a motor vehicle, or the handling of a piping hose during the fitting of the piping hose.

  In addition, this also increases the freedom of design of a pipe arrangement to allow the short length of hose required. And favorable pressure resistance can be guaranteed by the pressure-resistant reinforcing layer 18 formed by braiding the reinforcing threads 22 along the corrugations.

  In the first hose 10, the pressure-resistant reinforcing layer 18 can be laminated on the outer surface side of the inner rubber layer 16 in a favorable shape along the corrugations, or in a favorable corrugated shape, so as to reinforce the corrugation peaks and valleys uniformly in the corrugated part 12, and there is no weak reinforcement zone. Thus, since the first hose 10 does not have a part which is easily broken or cracked when internal pressure is exerted on the first hose 10, the first hose 10 has an improved overall pressure resistance. At the same time, since the pressure-resistant reinforcing layer 18 is formed in a shape which corresponds to the corrugations or a corrugated shape along the corrugated part 12 of the inner rubber layer 16, there is no problem that the flexibility coming from the corrugated part 12 is largely disturbed by providing the pressure-resistant reinforcing layer 18.

  Furthermore, since the pressure-resistant reinforcing layer 18 can be formed seamless and continuous in the circumferential and longitudinal directions, the pressure-resistant reinforcing layer 18 can effectively improve the pressure resistance of the first hose 10. Also, in the method of producing the first hose 10, the pressure-resistant reinforcing layer 18 can be easily formed, and thus the cost of producing the first hose 10 is lowered.

  Figures 4, 5 and 6 show a second vibration absorbing hose 30 (hereinafter simply referred to as a second flexible hose 30) according to the present invention. The second hose 30, which is applied for example as a coolant transport hose (air conditioning hose), is provided with a pressure resistance. The second hose 30 is formed by modifying the layered or laminated construction on a first side of the pressure-resistant reinforcing layer 18 of the first hose 10. Therefore, portions having an identical configuration 10 to the first hose 10 (including parts to which it is preferred to give identical numerical references to the first pipe 10 for a better understanding of the present invention) are provided with roughly identical numerical references, and occasionally descriptions of these will not be made.

  In the second hose 30, the outer rubber layer (outer layer of elastic rubber material) 20 is not laminated on the outer surface of the pressure-resistant reinforcing layer 20. Indeed, another reinforcing layer separated 32 is laminated thereon. The other separate reinforcing layer 32 is formed in a generally straight cylindrical shape. The other separate reinforcement layer 32 extends by covering the pressure-resistant reinforcement layer 18 in a contact relationship with the pressure-resistant reinforcement layer 18 at undulation peaks (peak peaks (see reference numeral 60 in Figure 10), for example, 30 in a close contact relationship therewith at the ripple peaks and in a spaced relationship therewith at the valleys ripple (see an enlarged perspective view of Figure 5, and reference numeral 62 in Figure 10). The other separate reinforcement layer 32 is formed in a cylindrical shape of small diameter at the two end parts 34, 34, so as to come into close contact with the two straight cylindrical end parts 14, 14 of the inner rubber layer 5 and of the pressure-resistant reinforcing layer 18, in a cylindrical shape of large diameter in a middle part or a long middle part 36, so as to come into close contact with the corrugation peaks of the corrugations (corrugated part 12) extending over a relatively long distance, or over a generally entire part of the inner rubber layer 16 and of the pressure-resistant reinforcing layer 18, and in a shape generally frustoconical (or a shape that increases diametrically) in border portions respectively between the end portion 34 and the middle portion 36, d e so as to come into close contact with the diametrically enlarged part 38 between the straight cylindrical end part 14 and the corrugation peak 20 of the outer end of the corrugations. In the second hose 30, an outer rubber layer (outer layer of elastic rubber material) 40 is further laminated on an outer side of the other separate reinforcement layer 32 as the outermost covering layer.

  In the second hose 30, just as in the first hose 10, the pressure-resistant reinforcing layer 18 is formed by braiding the reinforcing wires 22.

  The other separate reinforcing layer 32 can also be formed by braiding reinforcing threads 22. However, other reinforcing threads which are different from the reinforcing threads 22 can also be applied with regard to the material or the like.

  In addition, the outer rubber layer 40 can also be formed from the same rubber materials, the heat-shrinkable TPE tube and the TPE tube, like the outer rubber layer 20 in the first hose 10. Furthermore, it It goes without saying that the inner rubber layer 16, the reinforcing wire 22 and the pressure-resistant reinforcing layer 18 can be formed from the same material as in the first hose 10. In this embodiment, the second flexible 30 is designed to have an internal diameter of approximately 5 mmn to 50 mmn.

  The second hose 30 shown in Figures 4, 5 and 6 is manufactured for example as follows. As with the first hose 10, the inner rubber layer 16 is formed, and the pressure-resistant reinforcing layer 18 is formed and laminated on the outer surface of the inner rubber layer 16 by braiding the reinforcing threads 22 to using the braiding machine 24.

  Then, the other separate reinforcing layer 32 is further formed on an outer side of the pressure-resistant reinforcing layer 18 by braiding the reinforcing threads 22 using the braiding machine 24. And the rubber layer inner 16, 25 which is laminated with the pressure-resistant reinforcing layer 18 and the other separate reinforcing layer 32, is then immersed in a liquid compound so that the outer rubber layer 40 is then coated, the rubber layer outer 40 30 being on an outer side of the other separate reinforcing layer 32. Next, the product laminated with the outer rubber layer 40 is put in a drying oven for drying. However, it is possible not to provide the outer rubber layer 40.

  After drying, the mandrel 23 is removed, and a multilayer hose product is obtained, for example an elongated multilayer hose product. Then, for example, the hose product is cut to a desired length, and the second hose 30 shown in Figures 4, 5 and 6 is thus obtained. This is an example of methods for producing the second hose 30. The second flexible 30 can be produced by any other method.

  The second hose 30 of this embodiment of the present invention as set out above can also provide the same or substantially the same effects as the first hose 10.

  Additionally, the other separate reinforcement layer 32 can effectively prevent the second hose from being elongated in a longitudinal direction thereof.

[Examples 1 and 2]

  Some hoses with different constructions shown in Table 1 were formed, and they were evaluated with respect to elongation rates, burst pressure (pressure resistance) and pulse durability (pulse resistance ).

  These hoses from Example 1 and Comparative Example A were evaluated with respect to the vibration absorption property. In Table 1, in a case where an initial hose length is changed to a length P after a water pressure of 2.9 MPa has been exerted for five minutes inside a hose having the 30 initial hose length a, the elongation rate is indicated by the formula (P a) x 100 / a. The hose lengths a and D are substantially a hose length. Pulse durability (pulse resistance) indicates a condition of a hose in a case where an oil pressure between 0 and 2.9 MPa is repeatedly exerted inside each of the hoses through a oil tank while maintaining an oil temperature in the oil tank at 100 C. With regard to a first reinforcing layer (pressure-resistant reinforcing layer 18 in Example 1 of the first hose 10 and Example 2 of the second hose 30), and a second reinforcement layer (another separate reinforcement layer 32), in the line "Number of wires" in Table 1, "3 (4) wires x 48 10 (24) supports "means that 3 (4) parallel reinforcement threads of 1000 denier (de) or 2000 de are braided on a machine with 48 (24) supports. And the "inner layer" of Example 1 and Example 2 corresponds for example to the inner rubber layer 16, while the corresponding "outer surface layer" of Example 1 and Example 2 for example to the outer rubber layer 20, 40.

  With regard to the first reinforcement layer of Comparative Example B, in the line "Number of wires 20", "22 wires + 22 wires" means that 22 wires of 3000 of are wound in a spiral or helix or put in spiral around inner and outer sides of an intermediate rubber layer, respectively.

  The burst pressure value indicates the value of water pressure which causes a hose to burst when water pressure is exerted inside the hose at a pressurization speed of MPa / minute.

15 20 25 30 35

Table 1

Example i Example 2

A A B C

  Corrugated Corrugated Corrugated Corrugated Part length on100 100 100 100 dulcated (in mm) Hose length 150 * 1,150 * 1,150 * 1,150 * 1 (in nmm) Diameter 0 9.0 0 9.0 0 9.0 0 9.0 inside (valley) (valley) (valley) (valley) (in ram) Dimension (in mm) Diameter 0 20.0 0 20.0 0 20.0 0 20.0 outside (peak) (peak) ( peak) (peak) _ (in mm) Material IIR IIR IIR IIR Bpais Layer- Inner thickness 1.0 1.0 1.0 1.0 king (in mm) Material PET PET PET PET Denier (de) 1000 1000 1000 1000 First 3 wires x 3 wires X 3 wires X 3 wires x shadow layer of 48 sup- 48 sup- 48 sup- 48 suprenforce- wires ports ports ports ports ment Construct Braided Braided Braided Braided tion Material No PET PET PET Denier (de) - 1000 1000 1000 3-wire x 3-wire X 3-wire x Second number of - 48 sup- 48 sup- 48 super-layer of reinforced wires- ports ports reinforced ports Angle of ment -60 50 300 braiding Construc-- Braided Braided Braided tion 15 20 25 30 Example 1 Example 2

A A B C

  Type si- Type si- Type si- Type on Layer of licone licone licone licone surface ex- Wall thickness 0.5 0.5 0.5 0.5 (in mmn) Elongation rate of 2au of alnminute +34% +16% +1.5% -1.1% 2.9 MPa X 5 minutes Burst pressure 17.9 32.9 38.9 29.6 (MPa) Impulse durability- Not Not Burst- Bursts at burst temperature at (oil, tank) fully at 000 240,000 100 C, 300,000 300,000 cycles cycles 0 MPa <--> 2.9 MPa cycles cycles cycles cycles

Table 1 (continued)

Comparative example

A B C

  Shape Cylindrical cylindrical Wavy Length of wavy part _ _ 200 wavy (in mm) Hose length 450 450 300 450 450 300 (in mm) Diameter 0 25.0 inside 0 12.0 0 14.5 (2 (valley) (in num) Dimension Diameter 0 5.0 outside 0 19.5 0 22 (i (in mm) 1 1 (peak) _ _ _ _ _ _ _ _ _ (in nun) _ _ _ _ _ 15 20 25 Comparative example ABC Alloy Material IIR NBR PA6 / IRR * 2 Inner layer of pa-018/12 1.7 3.0 king (in mm Material PET PET No First Denier (of) 2000 3000 -layer of Number of 4 wires X 24 22 wires X reinforcement - support wires 22 supports ment Spiral ConstrucTion -tion Material No No No Denier (de) _ Second Number of layers of reinforcement wires- Braiding angle Construction Material EPDM EPDM No Layer of Thickness surface ex, é r. wall 1,4 1,0 -térieur (in _mn)

Comparative example

A B C

  Not measured Elongation rate due to + 1.2% + 2.1% 2.9 MPa x 5 minutes of a burst Burst pressure 28.8 14.5 0.1 (MPa) Impulse durability No d '' No burst - Not measured 10 sions at a temperature fully due to (oil, tank) of (oil, 300,000 cy- 300,000 cy- of a 100 C flash, key 0 MPa < -> 2.9 MPa Note: * 1: Opposite ends of 25 mm are 15 parts to be immobilized respectively, therefore an actual hose length is mm.

  2 *: IIR = inner rubber layer Alloy PA6 = inner resin layer 20 or resin membrane laminated in an inner surface of the inner rubber layer.

  At the same time, the vibration absorption property is evaluated by means of measuring equipment 42 shown in FIG. 7. Specifically, each hose of Example i (the first hose 10) and the Comparative Example A are set up on the measuring equipment 42 having opposite ends thereof fixed on metal cores 44, 44, respectively. L in FIG. 7 indicates for example a considerable length of hose. And while a first end of the hose is vibrated by a vibrator 46, and the other end of the hose receives vibrations, the acceleration value A0 at one end of the vibrator is measured at a measuring point P0 at one end of the vibrator, and an acceleration value A1 at a vibration receiving end is measured at the measuring point P1 at a vibration receiving end, respectively. Then, vibration transfer functions or transfer functions are calculated based on these values. The results are shown in a graph in Figure 8. In Figure 7, reference numeral 48 indicates a rubber element, and reference numerals 50 indicate a box of turntables.

  As indicated in Table 1, the hose A of Example 1 has an excellent resistance to pressure at a burst pressure of 17.9 MPa. Although hose A of Example 1 is much shorter in length than hose A of Comparative Example, the graph in Figure 8 indicates an excellent vibration absorption property of hose A of Example 1 And the hoses A, B and C of Example 2 20 (the second hose 30) also have excellent pressure resistance with a burst pressure of a minimum of 29.6 MPa.

  Hoses A, B and C of Example 2 have an excellent elongation rate of up to 16%, and have a superior elongation resistance property compared to hose C of Comparative Example and to hose A of Example 1. Hoses B and C of Example 2 having a second reinforcing layer, which is braided at a very low angle of angle less than a neutral angle, have an excellent rate of +1.5% and -1.1% elongation, and have a superior elongation resistance property. In addition, all the hoses A, B and C of Example 2 have a burst pressure of a minimum of 29.6 MPa, 35 and have a higher pressure resistance compared to the hoses A, B and C of Comparative Example and of hose A of Example 1. Still further, all the hoses A, B and C of Example 2 have a pulse durability (impulse resistance) of at least 240,000 cycles, and have a higher durability compared to flexible C of Comparative Example and flexible A of Example 1.

  In the first hose 10 and the second hose 30, the pressure-resistant reinforcing layer 18 or the other separate reinforcing layer 32 can also be formed by winding the reinforcing wire 22 in a spiral, by spiraling it or by knitting it. Here, the reinforcing wires 22 can be spirally wound respectively in a first direction to form a first layer, and in the opposite direction to form a second layer. The first layer and the second layer can constitute the pressure-resistant reinforcing layer 18 or the other separate reinforcing layer 32.

  A third vibration absorbing hose 52 (hereinafter referred to simply as the third flexible hose 52) according to the present invention shown in Figures 9, 10 and 11, which is for example applied as a refrigerant transport hose (flexible 25 air conditioning), has a pressure resistance.

  The third hose 52 is formed by changing the configuration of the pressure-resistant reinforcing layer 18 of the first hose 10. Therefore, parts having a configuration identical to the first hose 10 (including parts to which references are preferred identical to those of the first hose 10 for a better understanding of the present invention) are provided with roughly identical reference numerals, and occasionally descriptions of these are not carried out. The third hose 52 has a corrugated portion 54 extending over a relatively large length, or over almost an entire portion of the third hose 52, and end portions 14, 14 of a tubular shape with a straight side or a straight cylindrical shape. The third hose 52 has a multilayer construction, a tubular inner rubber layer 16, a pressure-resistant reinforcing layer 52 which surrounds an outer side of the inner rubber layer 16, and an outer rubber layer 20 as outermost covering layer.

  In the third hose 52, the pressure-resistant reinforcing layer 56 is formed or constructed by braiding reinforcing yarns or a filament element 22 (see Figure 3) on and along an outer surface of the inner tubular rubber layer 16, more specifically along a rectilinear cylindrical shape of the two end portions 14, 14 and corrugations therebetween. Consequently, the pressure-resistant reinforcing layer 56 is formed in a rectilinear cylindrical shape at the two end portions 14, 14, and in a shape which corresponds to the corrugations or in a corrugated shape, for example in a shape having corrugation peaks and corrugation valleys in the corrugated portion 54 between the two end portions 14, 14. The pressure-resistant reinforcing layer 56 is laminated on an outer side of the rubber layer interior 16 entirely in a relationship 30 of contact or close contact with the exterior surface thereof.

  The pressure-resistant reinforcing layer 56 is formed by having longitudinally oriented reinforcing wires 58 which extend in a longitudinal direction of the third hose 52 (a length direction of the third hose 52), as shown in the Figures 10 and 11. In this embodiment, the longitudinally oriented reinforcing wires 58 are, as shown in Figure 11, arranged in four positions spaced circumferentially by 90 on an outer circumference or periphery of the reinforcing layer resistant to the pressure 56 or of the inner rubber layer 16. The longitudinally oriented reinforcing threads 58 are interleaved in combination with reinforcing threads 22, or are arranged in the reinforcing threads 22 at these four circumferential positions during braiding of the pressure-resistant reinforcing layer 56. The layer of r pressure resistant enforcement 56 is formed more specifically by these longitudinally oriented reinforcing wires 58 and the reinforcing wires 22. The longitudinally oriented reinforcing wires 58 can be arranged in three circumferential positions or in more than four circumferential positions , for example, in eight circumferential positions in the pressure-resistant reinforcing layer 56.

  It goes without saying that the inner rubber layer 16 located in the third hose 52 can be formed from the same materials as those of the first hose 10.

  The longitudinally oriented reinforcing threads 58 and the reinforcing threads 22 which form the pressure-resistant reinforcing layer 56 can be made of PET, PEN, aramid, PA, Vynilon, rayon, metallic film or similar.

  That is, the pressure-resistant reinforcing layer 56 can be formed from the same material as the pressure-resistant reinforcing layer 18. And it goes without saying that the outer rubber layer can also be formed from the same materials as those of the first hose 10.

  In the third flexible pipe 52, the corrugated part 54 is not defined by continuous helical or spiral undulations 5 or in a longitudinal direction of the third flexible pipe 52, but by individual annular corrugations. That is, in the corrugated portion 54 of the third hose 52, adjacent corrugation peaks 60 and adjacent corrugation valleys 62 10 are discontinuous and separated from each other. And as shown in the enlarged perspective view of Figure 10, a rigid metal (or resin) stop ring 64 is arranged on the outer rubber layer 16 or on an outer surface of the inner rubber layer 16 at level of each corrugation valley 22 via the pressure-resistant reinforcing layer 56, or from an outer side of the pressure-resistant reinforcing layer 56 according to a relationship where it is arranged above. Each of the corrugation valleys 62 is stopped and is held against a movement in a direction enlarged diametrically by each stop ring 64. That is to say that by means of the rings 64, the corrugation valleys 62 of the inner rubber layer 16 are prevented from being enlarged diametrically. Under these circumstances, the corrugated part 12 of the first hose 10 and the second hose 30 can be formed from helical or spiral undulations.

  In this embodiment, the stop ring 30 64 is formed in a complete annular shape which corresponds to a circular shape of the outer peripheral surface of each separate corrugation valley 62, for example having an inside diameter generally equal to an outer diameter of the outer peripheral surface of each separate corrugation valley 62 (outer peripheral surface of the pressure-resistant reinforcing layer 56 or the inner rubber layer 16). The stop rings 64 arranged in the adjacent corrugation valleys 62 are discontinuous in a separate relationship to each other. This means that a separate stop ring 64 is arranged in each of the corrugation valleys 62.

  The stop ring 64 may have a notch at a circumferential part. Thus, the configured stop ring 10 64 is arranged from the outside of the pressure-resistant reinforcing layer 56 on the outside of the corrugation valley 62 of the inside rubber layer 16 (reinforcing layer pressure resistant 56), the notch is closed by welding opposite ends of the stop ring 64 to each other to form its annular or full ring shape, and thus the ring stop 64 is in a relationship where it is arranged above with the other side of the corrugation valley 62. For example, the stop ring 64 having an opening by cutting out a circumferential part of it and widening the notch is arranged on the outer side of the corrugation valley 62, and the notch is closed so that the opposite circumferential ends are in a contact relationship by deformation of the stop ring 64 of so that it is crushes, and welded together. Otherwise, the stop ring 64 can be originally formed in a complete annular shape without the notch or the opening. In this case, the stop ring 64 30 is slid over the outer surface of the inner rubber layer 16 (the pressure-resistant reinforcing layer 56), and along it, in the longitudinal direction up to 'arranged on the outside of the corrugation valley 62.

  The stop ring 64 can be formed from a wire of circular or rectangular cross section, for example a metal wire. In this case, for example, a wire is wound in an annular shape around the outside of each corrugation valley 62 to form the stop ring 64, and opposite circumferential ends of the stop ring 64 or wire are bent radially outward to form a pair of stop pieces. And a pair of the stop pieces are provided with a cover which secures the stop pieces with each other, or are twisted with each other to be joined.

  Preferably, such a metal stop ring 64 consists for example of a SUS or SUP material.

  In the third hose 52, as shown in the enlarged perspective view of Figure 10, the wall thickness differs between the corrugation peaks 60 and the corrugation valleys 62 in the corrugated part 54 of the inner rubber layer 16. That is, a wall thickness t1 in the ripple peak 60 is designed to be greater than a wall thickness t2 in the ripple valley 62 relative to the inner rubber layer 16.

  The third hose 52, as shown in Figures 9, 10 and 11, can be manufactured, for example, as follows. First, the inner rubber layer 16 having a corrugated portion (annularly corrugated portion) is formed by injection molding, extrusion blow molding or the like.

  As during the manufacture of the first hose 10, the reinforcing threads 22 are braided on the outer surface of the inner rubber layer 16 using the braiding machine 24.

  During the braiding process, longitudinally oriented reinforcing threads 58 are also intertwined in combination with the reinforcing threads 22, or are arranged in the reinforcing threads 22 at four circumferential positions using the braiding machine 24.

  After the inner rubber layer 16 has been laminated with the pressure-resistant reinforcing layer 56 by braiding the reinforcing threads 22 in combination with the longitudinally oriented reinforcing threads 58 on the outer surface 10 thereof as established herein above, the stop rings 64 are arranged from the outer sides of the pressure-resistant reinforcing layer 56 in each of the corrugation valleys 62. Next, the inner rubber layer 16, on which the rings ar15 rêt 64 are arranged completely, is immersed in a liquid compound so that the outer rubber layer 20 is then coated, the outer rubber layer 20 being on the outer side of the pressure-resistant reinforcing layer 56, and is put in a drying oven for drying.

  After drying, as in the first hose 10, the mandrel 23 is removed, and a multilayer hose product is obtained, for example an elongated multilayer hose product. Then, for example, the hose product is cut to a desired length, and there is thus obtained the third hose 52 shown in Figures 9, 10 and 11. This is an example of methods of producing the third hose 52. The third flexible 52 can be produced by other methods of conch.

  The third hose 52 according to the present invention can achieve the same effects as the first hose 10, or substantially the same. In addition, since the pressure-resistant reinforcing layer 56 is formed having the longitudinally oriented reinforcing wires 58, the third hose 52 can be effectively prevented from being elongated and deformed in the longitudinal direction when a internal pressure is exerted on it. This can solve the problem 5 which is that the third hose 52 is elongated in the longitudinal direction to interfere with other peripheral parts and components.

  In addition, since the longitudinally oriented reinforcing threads 58 are interleaved in combination with the reinforcing threads 22 during braiding, the longitudinally oriented reinforcing threads 58 and the reinforcing threads 22 hold each other, and thus the layer pressure-resistant reinforcement 56 can effectively prevent the corrugated portion 54, i.e., the third hose 52, from being elongated or deformed.

  And in the third hose 52, as the rigid stop rings 64 are arranged in the corrugation valleys 62 of the corrugated part 54 from the outer side of the pressure-resistant reinforcing layer 56 to stop the valleys d The corrugation 62 against movement in a direction which increases diametrically, the corrugated part 54 can be prevented even more favorably from being elongated and deformed when internal pressure is exerted on it. And since a load exerted on the corrugated portion 54 can be shared by the stop rings 64 and the pressure-resistant reinforcing layer 56 when internal pressure is exerted, there is an additional effect which is that the third flexible 52 can be provided with a much higher pressure resistance.

  In addition, in the third hose 52, as the wall thickness t2 in the corrugation peaks 60 of the corrugated part 54 in the inner rubber layer 16 is designed to be greater than the wall thickness t2 of the Ripple valleys 62, the deformation resistance property becomes large or high in the ripple peaks 60. Therefore, due to the cooperation of the deformation resistance of the ripple peaks 60 and the actions of the stop rings 64, the corrugated part 54 is more effectively prevented from being elongated and deformed when an internal pressure is exerted, as shown in FIG. 12.

  Figure 12 (a) shows the wavy part 54 of the third hose 52 which is neither elongated nor deformed, and Figure 12 (b) shows the corrugated part 54 which is elongated and deformed to some extent due to a internal pressure. Figures 12 (c) and 12 (d) 15 show corrugated parts of Comparative Examples on which internal pressure is exerted. Figure 12 (c) shows the corrugated part o the wall thickness t, of the ripple peak 60 is designed to be equal to the wall thickness t2 of the ripple valley 20 62. Figure 12 (d ) represents the corrugated part where the wall thickness t1 of the ripple peak 60 is designed to be equal to the wall thickness t2 of the ripple valley 62, but a stop ring 64 is not provided.

  As shown in Figure 12, by arranging the stop ring 64, the corrugated portion can be effectively prevented from being elongated and deformed. In addition, the wall thickness t1 of the designed ripple peak 60 greater than the wall thickness t2 of the ripple valley 62 can prevent the corrugated portion 64 from being elongated and deformed in a longitudinal direction from the third flexible pipe 52. More specifically, in FIG. 12 (b), an outside diameter of the third flexible pipe 52 or of the corrugation peaks 60 is reduced by dl due to the action of an internal pressure. However, since the resistance to deformation of the corrugated part 54 is important in the corrugation peaks 60 compared to the Comparative Example of FIG. 12 (c), di is smaller than d2, which indicates a decrease the outside diameter of the Comparative Example in Figure 12 (c). Thus, the elongation and the deformation of the corrugated part 54 in FIG. 12 (b) are lower by L1 than those of the Comparative Example in FIG. 12 (c). In the Comparative Example of FIG. 12 (d), the wall thickness t, of the ripple peak 60 is designed equal to the wall thickness 10 t2 of the ripple valley 62, but the ring d stop 64 is not provided. Therefore, in the Comparative Example of Figure 12 (d), the ripple peaks 60 are contracted radially inward of d3, and the ripple valleys 62 expand radially outward from d4 of does internal pressure. And the formulas d3 + d4> d2 and L2> L1 are established, so that the elongation and the deformation in figure 12 (d) are more important than in figures 12 (b) and 12 (c).

[Example 3]

  As shown in Table 2, some hoses with different constructions were formed, and the hoses were evaluated with respect to the elongation rates when pressure is applied or under pressure, burst pressure and a property of absorption of vibrations.

15 20 25

Table 2

Example 3

A B C

  Shape Wavy Wavy Wavy Inner diameter 0 9.0 0 9.0 0 9.0 laughing (in mm) (valley) (valley) (valley) Dimensions Outside diameter 0 20.0 0 20.0 0 20.0 laughing (in mm) (peak) (peak) (peak) Material IIR IIR IIR Peak wall thickness of 1.0- 1.0 1.0 1.0 Dulation layer (in mm) rubber Paint thickness king of valley 1 , 0 1.0 1.0 waviness 10 10 (in mm) Material PET PET PET Denier (de) 1000 1000 1000 Layer of 3 threads x 3 threads x 3 threads x reinforcement Number of threads 48 sup- 48 sup- 48 supports ports ports Braided Construction Braided Braided Material Wire PET Aramid - chain Number of wires 4 wires 4 wires - Material. _ SUP nneau ar-Thickness of king wall (diameter of. __ 0 0.9 wire) (in mmn) 15 20 25 30

Example 3

A B C

  material sheet Type si- Type si- Type siLayer of material licone licone licone rubber Thickness of the outside Thickness of the pa- 0.5 0.5 0.5 king (in mm) Elongation rate under pressure (%) 14.1 10.7 5.4 Internal pressure: 1.5 MPa Burst pressure (MPa) 17.9 18.2 18.6 Table 2 (continued) Example 3 Comparative example

D E D

  Wavy shape Wavy Wavy Inner diameter 0 9.0 0 9.0 0 9.0 upper (valley) (valley) (valley) Dimensions (in mm) sions Diameter ex, ri.ur0 20.0 0 20.0 0 20 , 0 térieur (in m) (peak) (peak) (peak) (in mmn) Material IIR IIR IIR Thickness of layer peak wall 1.5 10 of corrugation rubber (in mm) chouc Thickness of interior of upper valley of on 1.0 1.0 1.0 dulation (in mm) Example 3 Comparative Example

_ _D E D

  Material PET PET PET Layer Denier (de) 1000 1000 1000 of renNumber of 3 wires X 48 3 wires X 48 3 wires x 48 forcefils supports supports supports ment Construction Braided Braided Braided Fi e Material PET PET - Wire of Number of chain 4 wires 4 wires-wires SUP material ... thickness of wall ring (stop diameter of 0 0.9. _ wire) (in mm) button Type sili- Type sili- Type sili Cone cone cone cone rubber Material thickness 0.5 0.5 0.5 outside ( in mm) nieure Elongation rate under pressure (%) 3.9 11.8 22.3 3.9 11.8 22.3 Internal pressure: 1.5 MPa Burst pressure 18.6 18.2 17, 9 (MPa) _In Table 2, in a case where an initial length a of the corrugated part (approximately 100 mm) is changed to a length P of the corrugated part after an internal pressure has been exerted at 35 1, 5 MPa for one minute, the elongation rate under pressure is indicated by the calculation formula (a - a) x 100 / a. Here, the smaller elongation rate is the most favorable, but having regard to possible interference with peripheral parts and components, the elongation rate of 20% or less is acceptable.

  In Table 2, descriptions in row 2 "Number of threads" are for example indicated in the same way as in Table 1. And "Warp threads" of Example 3 corresponds for example to the reinforcing thread 10 oriented longitudinally 58. In addition, "Reinforcement layer" of Example 3 corresponds for example to the pressure-resistant reinforcement layer 56.

  As in Examples 1 and 2, the burst pressure indicates the pressure value 15 which causes a hose to burst when internal water pressure is exerted on the hose while increasing the internal pressure by 160 MPa / minute.

  The vibration absorption property is evaluated by measuring equipment 42 in the same manner as in Examples 1 and 2.

  The measurement conditions are as follows (the same as in Examples i and 2).

  [Vibration absorption property] The vibration absorption property is evaluated when internal pressure is exerted at 1.5 MPa on certain hoses. When internal pressure is exerted, each hose is elongated, and its value varies among the hoses. Consequently, the hoses are adjusted in length respectively before an internal pressure is exerted on them, so as to have a substantially equal length when an (internal) pressure is exerted on them. Then each hose is evaluated for the vibration absorption property.

  Hose configuration: straight Frequency: 40 Hz to 1000 Hz Acceleration: 3G, constant.

  As shown in Table 2, all hoses A, B, C, D and E of Example 3 (the third hose 52) have a burst pressure of approximately 18 MPa or higher, and have excellent pressure resistance. And these hoses A, B, C, D and E of Example 3 have an elongation rate of a maximum of 20% when pressure is exerted. In addition, as shown in Figure 13, some of the hoses A and D of Example 3 have excellent vibration absorption properties.

  In the third hose 52, the stop rings 64 can be omitted. That is, the third hose 52 may have the pressure-resistant reinforcing layer 56 without a stop ring 64 thereon. Likewise, the third hose 52 can be constructed to have the pressure-resistant reinforcing layer 52 which is formed without having longitudinally oriented reinforcing wires 58, and with the stop ring 64 arranged in each valley. corrugation 62. In addition, in the third hose 52, the outer rubber layer 20 can be removed depending on the circumstances.

  Figures 14 and 15 show a fourth vibration absorbing hose 66 (hereinafter simply referred to as the fourth flexible hose 66) according to the present invention. The fourth hose 66, which is applied for example as a refrigerant transport hose (air conditioning hose), is provided with a pressure resistance. The fourth hose 66 is formed by changing the configuration of the pressure-resistant reinforcing layer 54 of the third hose 52. Therefore, parts having a configuration identical to the third hose 52 (including parts which are preferred to be Numerical references identical to those of the third flexible pipe 52 for a better understanding of the present invention) are basically provided with identical numerical references, and occasionally descriptions of these will not be made. The fourth hose 66 has a corrugated portion 54 extending over a relatively large length or substantially an entire portion of the fourth hose 66, and end portions 14, 14 of a straight-sided tubular shape or a straight cylindrical shape. The fourth hose 66 has a multilayer construction, an inner tubular rubber layer 16, a pressure-resistant reinforcing layer 68 which surrounds an outer side of the inner rubber layer 16, an outer rubber layer 20 as a layer outermost overlap.

  In the fourth hose 66, the pressure-resistant reinforcing layer 68 is formed by arranging a reinforcing fabric 70 around the outer surface of the inner rubber layer 16, as shown in Figure 14. The reinforcing fabric 70 is formed from warp threads 72 and weft threads 74 by weaving warp threads 72 and weft threads 74, or by braiding warp threads 72 and weft threads 74. The threads can be formed of warp 72 and the weft yarns 74 or the pressure-resistant reinforcing layer 68 from the same material as the reinforcing yarns 22 and the pressure-resistant reinforcing layer 56 of the third hose 52. More specifically , the reinforcing fabric 70 is wound or rolled around the upper surface of the inner rubber layer 16, so that the warp threads 72 are oriented in a longitudi35 nal direction of the fourth th hose 66, and the weft yarns 74 in a direction perpendicular to the warp yarns 72 (in a circumferential direction). In other words, the reinforcing fabric 70 is applied annularly along a circumferential surface of the inner rubber layer 16 substantially without defining a helix angle.

  As shown in FIG. 15, a rigid metal (or resin) stop ring 64 is arranged on the inner rubber layer 16 or on an outer surface of the inner rubber layer 16 at each corrugation valley. 62 via the pressure-resistant reinforcing layer 68, or from an outer side of the pressure-resistant reinforcing layer 68 according to a relationship where it is arranged above. Each of the corrugation valleys 62 is stopped and retained against movement in a direction which is enlarged diametrically, and is reinforced by the stop rings 64. That is to say, through the stop rings 64, the corrugation valleys 62 of the inner rubber layer 16 to be enlarged diametrically. In this embodiment, the stop ring 64 is formed in a complete annular shape corresponding to a circular shape of the outer peripheral surface of each separate wave valley 62. The stop rings 64 arranged in the valleys of adjacent corrugations 62 in the longitudinal direction of the fourth hose 66 are discontinuous in a separate relationship or in a separate manner from each other. This means that a separate ridge ar30 64 is arranged on each of the corrugation valleys 62.

  The stop ring 64 has a notch 76 at a circumferential part, as shown in Figure 16 (c). Thus, the configured stop ring 64 is arranged from the outer side of the pressure-resistant reinforcing layer 68 in the corrugation valley 62 of the inner rubber layer 16, and then the notch 76 is closed by welding opposite ends of the stop ring 64 with each other to form its annular shape or into a final complete ring. For example, the stop ring 64 is deformed in a diametrically widened state at the notch 76, arranged in the corrugation valley 62 of the inner rubber layer 16, shrunk or brought back into a diametrically contracted state 10 , and then the notch 76 is closed by welding.

  However, just as in the third hose 52, depending on the circumstances, the stop ring 64 of the fourth hose 66 may be originally formed into a complete annular shape without the notch 76, or may be formed from of a wire, for example a metal wire. Preferably, the metal stop ring 64 can be formed for example from a SUS or SUP material.

  And it goes without saying that the inner rubber layer 16 and the outer rubber layer 20 can be formed from the same material as in the third hose 52.

  The fourth flexible hose 66, as shown in FIGS. 14 and 15, can be manufactured, for example, in the following manner. First, like the third hose 52, the inner rubber layer 16 including the corrugated portion 54 is formed as shown in Figure 16 (a).

  Then, as shown in Figure 16 (b), the reinforcing fabric 70 is wrapped or wrapped around an outer surface of the molded inner rubber layer 76, so that the warp threads 72 are oriented in one direction longitudinal of the fourth flexible hose 66 for constructing the pressure-resistant reinforcing layer 68. Then, as shown in FIG. 16 (c), the stop ring 64 having the notch 76 is arranged from the side outside of the pressure-resistant reinforcing layer 68 on the inner rubber layer 16 at each corrugation valley 62 of the corrugated part 54. Then, the notch 76 of the stop ring 64 arranged above is closed by welding opposite circumferential ends thereof with each other.

  And the stop rings 64 are arranged on the inner rubber layer 16 which is wrapped by the reinforcing fabric 70, and then this is laminated with the outer rubber layer 20 as the outermost layer or layer. covering just as in the third flexible pipe 52. Then, the fourth flexible pipe 66 can be obtained.

  Likewise, as shown in Figure 17, a plurality of molded inner rubber layers 16 can be slid over a long mandrel 29. Next, the long reinforcing fabric 70 is arranged along a length of the rubber layer inner 16, and wrapped around the outer surfaces of the inner rubber layers 16 in directions indicated by arrows in Figure 17, to form the pressure-resistant reinforcing layer 68. And as 25 above, the rings of stop 64 are arranged thereon.

  Then, the inner rubber layer 16 enveloped by the pressure-resistant reinforcing layer 68, the stop rings 64 being thereon, is dipped in a liquid compound so that the outer rubber layer 20 is then coated. , the outer rubber layer 20 being on its outer side as the outermost layer, and it is dried. After drying, the mandrel 29 is removed. Then, for example, a long multilayer hose product is cut to a length suitable for the fourth hose 66, and thus the fourth hose 66 can be obtained.

  The fourth hose 66 according to the present invention can achieve the same or substantially the same effects as the third hose 52. In addition, in this embodiment, the stop rings 64 arranged in the corrugation valleys 62 can be adapted as fixing means for the pressure-resistant reinforcing layer 68. And conmmne the stop rings 10 arranged on the outside of the corrugation valleys 62 are separated from each other as in the third flexible 52 , if one of them were to be broken, it would not happen that a retainer was lost along a certain length of the fourth hose 66, all this due to a rupture of the ring stop 64.

  In the fourth hose 66, as the pressure-resistant reinforcing layer 68 is constructed by wrapping the reinforcing fabric 70 around the outer surface of the inner rubber layer 16 so that the warp threads 72 are oriented in the longitudinal direction of the fourth hose 66, the warp threads 72 in the reinforcing fabric 70 can favorably prevent the fourth hose 66 from being elongated and deformed in the longitudinal direction thereof. On the other hand, the weft threads 74 can favorably prevent the fourth hose 66 from expanding and deforming radially. In the case where the pressure-resistant reinforcing layer is formed in this way, that is to say by wrapping the reinforcing fabric 70 around the inner rubber layer 16, the wrapping task or the task reinforcement layer construction is favorable for working efficiency. As a result, the productivity of the fourth hose 66 can be improved, while its manufacturing cost can be lowered.

[Example 4]

  As shown in Table 3, some hoses having alternative constructions were formed, and the hoses were evaluated with respect to the burst pressure (pressure resistance) and the vibration absorption property.

  With regard to the hoses A, B, C and D 10 of Example 4 (the fourth hose 66), in the line "Laminating mode" of the reinforcing layer (the pressure-resistant reinforcing layer 68) , "Wrapped" means that the reinforcing layer is formed by wrapping a reinforcing fabric 70 around an outer surface of the inner rubber layer 16 in a manner shown in Figures 14 to 17, and "Spiraling" means that the reinforcing layer is formed by spirally wrapping a reinforcing fabric 78 around it, so that the warp threads 80 and the weft threads 82 are oriented at an angle inclined with respect to the longitudinal direction of the fourth hose 66, as shown in FIG. 18.

  As in Examples 1 and 2, the burst pressure indicates a pressure value which causes a hose to burst when internal water pressure is exerted on the hose, while increasing the internal pressure by 160 MPa / minute .

15 20 25

Table 3

Example 4

A B C D

  Wavy shape Wavy Wavy Wavy Part length 100 100 100 100 100 100 wavy (in nmm) Flexi length 150 * 1,150 * 1,150 * 1,150 * 1 ble (in mrm) Diameter tr r 0 9.0 0 9.0 0 9.0 0 9.0 interior (valley) (valley) (valley) (valley) (in rmm) Dimension Diameter u. 0 19.5 0 19.5 0 19.5 0 19.5 exterior (peak) (peak) (peak) (peak) (in mm) Material layer IIR IIR IIR IIR rubber Interior wall thickness 1.0 1.0 1 , 0 1.0 (in mm) Material PA66 PA66 PA66 Aramid Mode of stratification- Envelop- Envelop- En spi- Envelopstratifi- ,, ation pée rale pée pale Denier layer reinforced. _ _ __. (de) ment

  Number of construction wires 15 20 25 30

Example 4

A B C D

  Material SUS SUP SUP SUP Thickness level Reinforced wall thickness (diameter 0 0.5 0 0.9 0 0.9 0 0.9 ment of wire) (in nmm) material Type si- Type si- Type si- Sirlaterial type Layer of licone licone licone licone rubber Outside wall thickness 0.5 0.5 0.5 0.5 (in mm) Burst pressure 3.8 9.4 9.7 19.3 ent (MPa) Property of absorp-- Figure 19 Figure 19 -tion of vibrations

Table 3 (continued)

Comparative example

E F G

  Shape Cylindrical Cylindrical Wavy Part length on- 200 - 200 dulculated (in mm) Hose length 450 450 300 (in mm) Diameter 0 25.0o inside 0 12.0 0 14.5 (valley) (valley) (in rmm) Dimension Diameter 0 50.0 outside 0 19.5 0 22.0 (peak) (in mmn) 15 20 25 30 Comparative example EFG Alloy Material Alloy IIR NBR PA6 / IIR layer * 2 rubber Inner wall thickness 0.18 / 1.2 1.7 3.0 (in mm) Material PET PET No Laminating mode. _ _.

  cation Denier layer (of) 2000de 3000de -reinforcement Number of 4 wires x 24 22 wires x support wires 22 wires Braided Construction Spiral -_ _ _ _ _ _ _ _ _ _ _ t i o n _ _ _ _ _ Material. . .__.

  Reinforcement wall thickness (diameter ... of wire) (in mm) Material EPDM EPDM No IE layer Rubber thickness Wall thickness 1.4 1.0 - exterior (in mm) Burst pressure 28.8 14 , 5 0.1 (MPa) Absorption property Figure 19 Figure 19 __. _ vibration Note: * 1: Opposite ends of 25 mm are parts to be immobilized respectively. Therefore, the actual hose length is 100mm.

  * 2: PA6 alloy = inner resin layer or laminated resin membrane in an inner surface of the inner rubber layer.

  The vibration absorption property is evaluated via measuring equipment 42 in the same manner as in Examples 1 and 2.

  As shown in Table 3, all of the hoses A, B, C and D of Example 4 (the fourth hose 66) have a burst pressure of ap10 approximately 4 MPa or higher, and therefore have a excellent resistance to pressure. Although these hoses A, B, C and D of Example 4 have a much shorter length than hose E of the Comparative Example, some of them show an excellent slow vibration absorption property in the graph of Figure 19. In Table 3, descriptions in the line "Number of threads" are for example indicated in the same way as in Table 1. And "Reinforcement layer" of Example 4 corresponds for example to the pressure-resistant reinforcing layer 68. In addition, "reinforcing ring" in Example 4 corresponds for example to the stop ring 64.

  In the fourth hose 66, a wall thickness of the corrugation peaks 60 of the corrugated portion 54 in the inner rubber layer 16 is designed as large as that of the corrugation valleys 62 thereof. However, a wall thickness of the ripple peaks 60 can be designed greater than that of the ripple valleys 62. In the fourth hose 30 66 constructed by having ripple peaks 60 and ripple valleys 62 configured from the so, the stop rings 64 act to prevent longitudinal elongation and longitudinal deformation of the fourth hose 66 accompanied by a diametrical enlargement of the corrugation valleys 62, and as a result resistance to deformation is increased in peaks. ripple 60.

  Thus, the fourth hose 66 is effectively prevented from being elongated and deformed in the longitudinal direction thereof when internal pressure is exerted thereon.

  In addition, in the fourth hose 66, the outer rubber layer 20 or cover layer serving as the outermost layer can be removed.

  Figures 20, 21 and 22 show a fifth vibration absorption hose 84 (hereinafter referred to simply as the fifth hose 84) according to the present invention. The fifth hose 84, which is applied for example as a refrigerant transport hose (air conditioning hose), is provided with a pressure resistance. The fifth hose 84 is formed by modifying the multilayer construction of the first hose 10 to ensure resistance to the penetration of gases. Consequently, parts having a configuration identical to the first hose 10 (including parts to which it is preferred to give identical reference numbers to the hose 10 for a better understanding of the present invention) are provided with roughly identical reference numbers, and occasionally 25 descriptions of these are not given. The fifth flexible hose 84 has a corrugated part 12 extending over a relatively long length or over substantially an entire part of the fifth flexible hose 84, and end parts 14, 14 of a tubular shape with a straight side 30 or a straight cylindrical shape. The fifth hose 84 has a multilayer construction, an inner tubular rubber layer 16, a pressure-resistant reinforcing layer 18 which surrounds an outer side of the inner rubber layer 16, 35 and an outer rubber layer 20 serving as a neck - outermost cover. And in the fifth hose 84, the resin membrane or coating 86 is laminated into an inner surface of the inner rubber layer 16 by electrostatic spraying of resin.

  In the fifth hose 84, as in the first hose 10, the pressure-resistant reinforcing layer 18 is formed or constructed by braiding reinforcing threads or a filament element 22 (see Figure 3) on a surface outer of the inner tubular rubber layer 16, and along the latter, more specifically along a straight cylindrical shape of the two end portions 14, 14 and the corrugations therebetween. Consequently, the pressure-resistant reinforcing layer 18 is formed in a straight cylindrical shape at the two end portions 14, 14, and in a shape which corresponds to the corrugations or to the corrugated shape, for example according to a shape having peaks and corrugation valleys in the corrugated portion 12 between the two end portions 14, 14. The pressure-resistant reinforcing layer 18 is laminated on an outer side of the inner rubber layer 16 entirely according to a close contact or contact relationship with its outer surface.

  Here, the resin membrane 86 is formed from a resin powder by coating or electrostatic spraying in a wall thickness or thickness of 50 gm to 250 gm. Due to this resin membrane 86 (or resin powder by coating or electrostatic spraying), the inner rubber layer 16 has a volume resistivity value of a maximum of i × 10 6 Q-cm.

* In the fifth hose 84, it goes without saying that the inner rubber layer 16, the pressure-resistant reinforcing layer 18, the reinforcing threads 22 of the pressure-resistant reinforcing layer 18 and the rubber layer outer 20 may be made of the same material as the first hose 10. The fifth hose 84 is designed to have an inner diameter of approximately 5 mm to mm.

  The fifth hose 84, as shown in Figures 20, 21 and 22, can be manufactured, for example, as follows. First, as in the first hose 10, the inner rubber layer 16 having a corrugation is formed by injection molding, extrusion blow molding or the like.

  Next, an adhesive agent is applied to an inner surface of the inner rubber layer 16. The adhesive agent is applied, for example, in the following manner. As shown in Fig. 23 (a), a spray nozzle 88 is inserted inside the inner rubber layer 16, and then a spray of the adhesive agent is sprayed onto the inner surface of the rubber layer interior 16 through many jet perforations arranged on the spray nozzle 88.

  After the applied adhesive agent has dried, a resin powder is then electrostatically sprayed onto the inner surface of the inner rubber layer 16, for example as follows. The inner rubber layer 16 is placed inside a chamber 90, and the resin powder is sprayed outside as a jet onto the inner surface of the inner rubber layer 16 through a nozzle jet nozzle 92 on a tip end of a spray gun 94 in a direction perpendicular to an axis, or in a radial direction (see Figure 23 (b)).

  A supply hose 96 and an air hose 98 are connected to the spray gun 94. And the spray gun 94 is connected via a conductive wire 100 to a high voltage generator. During electrostatic coating or spraying via the spray gun 94, the resin powder supplied to the spray gun 94 is sprayed as a jet with air which is also supplied thereto through the jet nozzle 92 10 on the tip end. At this time, the resin powder is sprayed in a negatively or positively charged state.

  On the other hand, the inner rubber layer 16 is held by a metal plate, and is grounded via the metal plate. Here, a high negative voltage is applied to the spray gun 94, and the resin powder is thus sprayed as a jet in a negatively charged state. At this time, the inner rubber layer 16 acts as a counter electrode (positive electrode), the negatively charged resin powder flies towards the inner rubber layer in an electrostatic field generated during the application of a high negative voltage, and is attached to the inner surface of the inner rubber layer 16 to form a resin coating or a membrane thereon.

  Then, as in the first hose 10, the inner rubber layer 16 coated with resin powder is taken out of the chamber 90, and is heated 30 in a heated oven or as shown in Figure 23 (c) through a heater 102, such as a near infrared radiation heater, which is inserted inside the inner rubber layer 16 to heat and melt the resin powder. Then, the resin powder is cooled, and thus the resin membrane 86 is laminated in the inner surface of the inner rubber layer 16.

  After the resin membrane 86 has been laminated in the inner surface of the inner rubber layer 16 in this manner, as in the first hose 10, the reinforcing threads 22 are braided on the outer surface of the inner rubber layer 16 to form the pressure-resistant reinforcing layer 18 thereon by means of the braiding machine 24. And the inner rubber layer 16, which is laminated with the pressure-resistant reinforcing layer 18, is then immersed in a liquid compound so that the outer rubber layer 20 is then coated, the outer rubber layer 20 being on the outer side thereof (reinforcing wires 22), and is placed in a drying oven for drying.

  After drying, as in the first hose 20 10, the mandrel 23 is removed, and then, for example, a long multilayer hose product is cut to a desired length, and the fifth hose 84 shown in FIGS. 20 is thus obtained, 21 and 22. This is an example of methods of producing the fifth hose 84. The fifth hose 84 can be produced by any other method.

  The fifth hose 84 can obtain the same effects or substantially the same effects as the first hose 10.

  In the fifth hose 84, the resin membrane 86 is laminated in the inner surface of the inner rubber layer 16 to a wall thickness or thickness of 50 mm to 250 gm by electrostatic coating or spraying, and thus the property of resistance. gas penetration can be significantly improved compared to the first hose 10.

[Example 5]

  Inner rubber layers of Example 5 (which are applied to the fifth hose 84) and a Comparative Example were formed from mixed rubber materials as shown in Table 4 ("Rubber composition"), respectively , and the resin membrane was formed in interior surfaces of the interior rubber layers from different resin materials, as shown in Table 4, with a wall thickness or a different thickness, through electrostatic coating or spraying. Then, each mem15 brane in resin 86 was evaluated with regard to the coating property and the permeability to Freon gas.

  The Freon gas permeability is assessed using a sheet 104 (see Figure 24) which is formed from the same material as the inner rubber layer by vulcanization. The results are also shown in Table 4.

Table 4

  Comparative Example Example 5 _ _ _ _H | IJAB Type or type of polymer IIR / C1IRR 15 20 Rubber composition Steric acid Zinc oxide <- <- <- <- zinc Black <<<<<carbon FEF oir black -_ <- <- <- <- carbon MAF naphthene type oil (treated) Paraffin type oil (treated) Vulcanizing material Resin Comparative Example Example 5

H I J A B

  Layer of caulvolumic Resistivity 1,6X10 <- <<<cauldron (.cm) inside Membrane Type - PAll <- <- <in re-thickness in re-thickness 0.04 0.6 0.05 0 , 2 sine (in mm) Rubber / re OX 0 O property of sine coating Penetration and freon MgC2 3.4 2 0.2 1.7 0.6 (mg / cm per day) XXOQO estimate

Table 4 (continued)

Example 5

  _ __C [D E F G 15 20 Kind or type of polymer IIR / CiIRR

EPDM

EPM

  Composition of rubber Stearic acid <-iric Oxide of 5 <- <- 5 <zinc Black of <40 <- carbon FEF Black of - <-. ... 90 carbon MAF Oil type naph- 5 <- <.. tene (treated) Oil type paraf- <- 60 fine (treated) Vulcanization material Resin

S

PO 30

  Resistivity layer rubber-9 = rubber volume 1,6x104 <- 2.9X10 9.6X10 5.4x105 internal cauldron (example 15 CDEFG Resin Fluororonitrile Nitride Membrane Type PAll <- <-en re-carbol pyrolytic resin born as (PBN) thickness thick) 0.2 0.2 0.2 0.2 0.2 0.2 (in mm) Rubber / ownership 0 OA 0 O sine coating Freon penetration (Mg / cm2 per 0.5 0.2 0.9 1.5 1.5 (mg / cm2 per day) Estimate 0 OOOO Here, the gas permeability or resistance to gas penetration is evaluated as follows. As shown in Figure 24, the opening of a cup 106, in which Freon gas (HFC-134a) is enclosed at a low temperature, is closed with a sheet of vulcanized rubber 104, and is then placed in an oven 108 to 90 C. Then, the change in weight (quantity lost) per day and per unit penetration area is calculated to obtain the value of the penetration quantity of Freon gas.

  An estimate is made on the basis of a flexible H of the Comparative Example. If the penetration of Freon gas (value of the quantity of Freon gas penetration) is equal to or less than 50% (1.7 mg / cm2 per day) of that of hose H of the Comparative Example, the estimate is indicated. with a symbol "O", (good). If the Freon gas penetration is greater than 50% of this, the estimate is indicated by an "X" symbol (lower).

  With regard to the coating property with respect to the resin membrane in Table 4, if a coating is carried out in a uniform wall thickness or thickness, the estimate is indicated by a symbol "O" (good) . If it is difficult for the coating to be carried out in a uniform wall thickness or thickness (including the case where the resin powder remains on an inner surface of the inner rubber layer), an estimate is indicated by a "X" symbol (lower). In a borderline case, an estimate is indicated by an "A" symbol.

  As for the estimation from the above results, it can sufficiently improve the resistance to permeability of Freon to laminate the inner surface of the inner rubber layer with the resin membrane with a thickness of 50 gm to 250 im (specifically 50 gm to 20,200 gm). Therefore, the fifth hose 84 having such a resin membrane 86, as shown in Figures 20, 21 and 22, not only has excellent resistance to gas permeability, but also resistance to favorable pressure caused by the layer of pressure-resistant reinforcement 18 laminated on the outer surface of the inner rubber layer 16, and a favorable vibration absorption property provided by the corrugated portion 12.

  In the fifth hose 84, the resin membrane 86 is laminated in the inner surface of the inner rubber layer 16. However, for example as shown in Fig. 25, the resin membrane 86 can be laminated on an outer surface of the inner rubber layer 16, instead of being laminated in its inner surface, and the pressure-resistant reinforcing layer 18 can be laminated on an outer side of the resin membrane 86. Or if the layer of pressure resistant reinforcement 18 is formed by braiding reinforcing threads 22 in the fifth hose 84, the pressure resistant reinforcing layer 18 can also be formed by winding the reinforcing threads 22 in a spiral. In addition, the outer rubber layer 22 or the cover layer can be omitted in these circumstances.

  Figures 26 and 27 show a sixth vibration absorbing hose 110 (hereinafter referred to simply as the sixth flexible 110) according to the present invention. The sixth hose 110, which is applied for example as a refrigerant transport hose 15 (air conditioning hose), is provided with a pressure resistance. The sixth hose 110 is formed by modifying a multilayer construction of the first hose 10 to ensure resistance to gas penetration.

  Consequently, parts having a configuration identical to the first hose 10 (including parts which are preferred to have the same reference numerals as the hose 10 for a better understanding of the present invention) are basically provided with identical reference numerals. , and occasionally descriptions thereof are not made. The sixth hose has the corrugated portion 12 extending over a relatively long distance, or over an almost entire portion of the sixth hose 110, and end portions 14, 14 of a straight cylindrical shape. The sixth hose 110 110 has a multilayer construction or configuration, a tubular inner rubber layer 16, a pressure-resistant reinforcing layer 18 which surrounds an outer side of the inner rubber layer 16, and an outer rubber layer 20 serving outermost covering layer.

  In the sixth hose 110, the pressure-resistant reinforcing layer 18 is formed or constructed by braiding reinforcing threads or a filament element 22 (see FIG. 3) on an outer surface of the inner rubber layer tubular 16, and along the latter, more specifically along a rectilinear cylindrical shape of the two end portions 14, 14 and the corrugations therebetween. Consequently, the pressure-resistant reinforcing layer 18 is formed in a rectilinear cylindrical shape at the two end portions 14, 14, and in a shape corresponding to the corrugations or to the corrugated part, for example a shape having corrugation peaks and valleys in the corrugated portion 15 12 between the two end portions 14, 14. The pressure-resistant reinforcing layer 18 is laminated on an outer side of the inner rubber layer 16 entirely in a relationship contact or tight contact with its outer surface.

  The inner rubber layer 16 in the sixth hose 110 can be formed from the same material as in the first hose 10.

  In the sixth hose 110, the same material as the first hose 10 can be applied to the pressure-resistant reinforcing layer 18, to the reinforcing wire 22 of the pressure-resistant reinforcing layer 18 and to the rubber layer outside 20. The sixth flexible 110 is designed to have an inside diameter of approximately 5 to 50 mm, preferably 5 to 25 mm.

  In the sixth hose 110, as shown in the enlarged perspective view of Figure 27, the inner rubber layer 16 is constructed to have corrugations or wall thickness tz in corrugation peaks 60 of the corrugated portion 12 differs from a wall thickness t2 in the corrugation valleys 62.

  More specifically, the inner rubber layer 16 is constructed to have corrugations in which a wall thickness t1 in corrugation peaks 60 is greater than a wall thickness t2 in corrugation valleys 62, and t1 / t2 is established from 1.2 to 6.0 when the sixth flexible hose 110 is formed.

  The sixth flexible 110 as shown in Figures 26 and 27 can be manufactured for example as follows. First, the inner rubber layer 16, including the corrugated portion, is formed by injection molding, extrusion blow molding or the like.

  And as in the first hose 10, the reinforcing threads 22 are braided on the outer surface of the inner rubber layer 16 using a braiding machine 24 to form the pressure-resistant reinforcing layer 18. And the inner rubber layer 16 which is laminated with the pressure resistant reinforcing layer 18 is then immersed in a liquid compound so that the outer rubber layer 20 is coated, the outer rubber layer 20 being on the outer side the inner rubber layer 16 or the reinforcing threads 22, and is placed in a drying oven for drying.

  After drying, as in the first hose 30 10, the mandrel 23 is removed to obtain, for example, an elongated multilayer hose product. Then, for example, the hose product is cut to a desired length, and thus the sixth hose 110 shown in Figures 26 and 27 is obtained. This is an example of methods of producing the sixth hose 110. The sixth hose 110 can be produced by any other methods.

  The sixth flexible 110 makes it possible to obtain the same effects or generally the same effects as the first flexible 10.

  As a general rule, in a hose having a corrugated part, the gas is more permeable, or penetrates more easily into corrugation peaks of large diameter than into corrugation valleys of small diameter. However, in the sixth hose 110, as the wall thickness tl in the ripple peaks 60 is designed to be greater than the wall thickness t2 in the ripple valleys 62 at a ratio of tl / t2 in the range ranging from 1.2 to 6.0 relative to the corrugated portion 12 in the inner rubber layer 16, the resistance to gas penetration of the corrugated portion 12 is effectively improved. Thus, a filler need not necessarily fill in the inner rubber layer 16 to improve the resistance to penetration of gases. However, a charge can fill it.

[Example 6]

  Some hoses are formed by having different constructions, as shown in Figure 5, and the amount of refrigerant penetration, burst strength (resistance to pressure) and flexibility are assessed respectively. The results are shown in Table 5.

15 20 25

Table 5

Example 6

A B C D E

  Wavy Shape Wavy Wavy Wavy Wavy In- Diameter 0 0 9.0 0 9.0 0 9.0 0 9.0 0 9.0 Inner (val- (val- (val- (val- (val (in mm)) lée) lée) lée) lérière outside 0 20,0 0 20,0 0 20,0 0 20,0 0 20,0 térieur (pic) (pic) (pic) (pic) (pic) (in ram) Dimension Length of if one part ond predesi o 100 100 100 100 100 lée (in mm) Hose length 150 * 1 150 * 1 150 * 1 150 * 1 150 * 1 (in mm) Material IIR IIR IIR IIR IIR Wall thickness in Layer peaks 1.2 1.5 3.0 1.5 3.0 ripple rubber (in zm't) chouc (in mm) interior wall thickness in the valleys 1.0 1.0 1, 0 0.5 0.5 ripple (in mm) 15

Example 6

A B C D E

  material PET PET PET PET PET Denier (de) 1000 1000 1000 1000 1000 Layer 3 wires 3 wires 3 wires 3 wires 3 son of renumber of X 48 X 48 X 48 x 48 x 48 forcefils sup- sup- sup- supmentment ports ports ports ports Construction Braided Braided Braided Braided Braided Layer Type Type Type Type Material Type sili- sili- sili- sili- silicaout- cone cone cone cone chouc Exterior thickness 0.5 0.5 0.5 0, 5 0.5 higher (in mm) Refrigerant penetration quantity (HFC1.0 0.9 0.75 1.0 0.83 134a) at 900C (g / piece for 72 hours) Burst pressure (MPa) 18, 0 18.0 17.5 17.3 17.4 (MS flexibility (N) 7.5 8.0 9.6 6.8 9.1a) Flexibility (N) 7.5 8.0 9.6 6.8 9, 1 15 20 25 30

Table 5 (continued)

Comparative example

K L

  Wavy shape Wavy Inner diameter 9.0 0 9.0 laughter (valley) (valley) (in mm) Outside diameter0 20.0 0 20.0 laughter (peak) (peak) Dimension (in mm) corrugated part 100 100 (in mm) Hose length 150 * 1 150 * 1 (in mm) Material IIR IIR Wall thickness in the corrugated peak layers - 1.0 3.5 of rubber cost (in rmx) - Thickness of the upper wall in the lower aisles of 1.0 0.5 dulation (in mm) Material PET PET Denier layer (of) 1000 1000 of ren3 threads X 48 3 threads X 48 force Number of support wires woven eConstruction Braided Braided Braided Construction 15 Comparative Example KL Layer Material Silicone Type Silicone Type of Wall Thickness (in mm) Head 0.5 0.5 Outside Refrigerant Penetration Amount (HFC- 1.2 0.69 134a) to 90 C (g / piece for 72 hours) Burst pressure 17.9 16.9 (MPa) Flexibility (N) 7.4 10.1 Note: * 1: Opposite ends of 25 mm are parts to be immobilized es respectively. Therefore, an actual hose length is 100mm.

  In Table 5, the amount of refrigerant penetration (resistance to gas penetration), the burst pressure (resistance to pressure) and the flexibility are evaluated under the following conditions.

  [Quantity of coolant penetration 25 (by weight)] As shown in Figure 28, four sample hoses were prepared. Each of the three sample hoses is connected to a silencer 112 having a capacity of 50 cc at one end, an HFC-134a coolant is filled to 70% of its capacity, and each of the three sample hoses is closed at the other end using caps 114. The remaining sample hose does not contain HFC-134a to verify a change in weight of a single hose or of a hose itself, and is closed at both ends by caps 114 , as shown in Figure 28, and in this state a change in the weight of the single hose is evaluated.

  The sample hoses are placed in an oven at 90 ° C., and the weight of the single hose and the sample hoses connected to the silencers 112 is measured every 24 hours for 96 hours, and the amount of refrigerant penetration (by weight) per hose is 10 calculated according to the following formula: [weight loss of the sample hose enclosed in coolant (96 hours - 24 hours) weight loss of the single hose (96 hours - 24 hours)] The amount of penetration of coolant is so favorable as low as possible.

  Here, we are targeting a value of 1.1 g / flexible / 72 hours.

  [Burst pressure] As in Examples 1 and 2, the burst pressure indicates the water pressure value which causes a hose to burst when water pressure is exerted inside the hose to a pressurization speed of 160 MPa / minute.

  [Flexibility] As shown in Figure 29, each of the sample hoses is supported by two support columns spaced 100mm apart on a base plate. Next, a load is exerted on the hose at a rate of 10 mm / minute in the center of it, and a maximum load or a peak load is measured as an indicator of flexibility. The maximum load is favorably as low as possible, or the flexibility is favorably as high as possible, but here a maximum value of 10 newtons (N) is targeted.

  As indicated by the results in Table 5, hoses A, B, C, D and E of Examples 6 (the sixth hose 110) have values below the target values of refrigerant penetration amount and flexibility, and have a superior penetration resistance and flexibility compared to the hose of the Comparative Example. And the hoses A, B, C, D and E of Example 6 have a burst pressure of 17 MPa or more, so that the pressure resistance 10 is excellent. In Table 5, the descriptions in the line "number of wires" are for example indicated in the same manner as in Table 1. And "reinforcing layer" of Example 6 corresponds for example to the reinforcing layer resistant to pressure 18.

  In the sixth hose 110, the pressure-resistant reinforcing layer 18 can be formed by winding the reinforcing wires 22 in a spiral around the outer surface of the inner rubber layer 16 in the same manner as in the first hose 20 10 , depending on the circumstances.

  From one end of Tables 1 to 5 to the other, different numerical indications can be attributed to Comparative Examples having an identical construction.

Claims (16)

  1. A vibration absorbing hose comprising: a layer of tubular rubber (16) having corrugations (12, 54), and a pressure-resistant reinforcing layer (18, 56) laminated on an outer surface side of the rubber layer (16), and characterized in that it comprises one or more reinforcing threads (22) 10 arranged along the corrugations (12, 54), the reinforcing thread (s) (22) forming the layer of pressure-resistant reinforcement (18, 56) with a shape which corresponds to the corrugations (12, 54).   2. A vibration absorbing hose according to claim 1, characterized in that the reinforcing wires (22) are braided along the corrugations (12, 54) to form the pressure-resistant reinforcing layer (18, 56 ) with a shape which corresponds to the undulations (12, 54).   3. flexible vibration absorption according to claim 1 or 2, characterized in that the pressure-resistant reinforcing layer (18, 56) is formed by arranging the reinforcing thread (s) (22) narrowly and tightly, so that the rubber layer (16) is not seen through it.   4. A vibration absorbing hose according to any one of claims 1 to 3, characterized in that it further comprises: another separate reinforcement layer (32) laminated on an outer surface side of the reinforcement layer pressure resistant (18), with clearance defined in undulating valley positions of the corrugations (12) between the pressure resistant reinforcing layer (18) and the other separate reinforcing layer (32).   5. A vibration absorbing hose according to claim 4, characterized in that the other separate reinforcing layer (32) is formed by arranging one or more reinforcing wires (22) at an established angle of 30 to 54, 44.   6. vibration absorption hose according to any one of claims i to 5, characterized in that the pressure-resistant reinforcing layer (56) comprises one or more longitudinally oriented reinforcing wires (58) extending in a longitudinal direction of the vibration absorbing hose (52).   7. A vibration absorbing hose according to any one of claims i to 6, characterized in that it further comprises: a plurality of rigid annular stop rings (64) arranged individually along a longitudinal direction of the vibration absorbing hose 20 (52), the stop rings (64) being arranged on an outer side of the pressure-resistant reinforcing layer (56) in corrugated valley positions (62 ) corrugations (54), so as to stop the pressure-resistant reinforcing layer (56) radially, respectively.   8. flexible vibration absorption, characterized in that it comprises: a layer of tubular rubber (16) having corrugations (54), a reinforcing fabric (70) wrapped around an outer surface side of the rubber layer (16), so as to constitute a pressure-resistant reinforcing layer (68) in a layered relationship with the rubber layer (16), a plurality of rigid annular stop rings (64) arranged individually along a longitudinal direction of the vibration absorbing hose (66), the stop rings (64) being arranged on an outer side of the reinforcing fabric (70) in corrugated valley positions (62 ) corrugations (54), so as to stop the reinforcing fabric (70) radially to form the pressure-resistant reinforcing layer (68) having a shape which corresponds to the undulations (54), and the reinforcement (70) being formed by braiding o u interlacing reinforcing warp threads (72) and reinforcing weft threads (74), being wrapped around the outer surface side of the tubular rubber layer (16), so that the warp threads reinforcement (72) are oriented in a longitudinal direction of the vibration absorbing hose (66).   9. Vibration absorbing hose, characterized in that it comprises: a layer of tubular rubber (16) having corrugations (54), a reinforcing fabric (78) wound in a spiral around a surface side outer layer of the rubber layer (16), so as to form a pressure-resistant reinforcing layer (68) in a layered relationship with the rubber layer (16), a plurality of rigid annular stop rings ( 64) arranged individually along a longitudinal direction of the vibration absorbing hose (66), the stop rings (64) being arranged on an outer side of the reinforcing fabric (78) in valley positions d corrugation (62) of the corrugations (54) so as to stop the reinforcement fabric (78) radially to form the pressure-resistant reinforcement layer (68) having a shape which corresponds to the corrugations (54), and the reinforcing fabric (78) being formed by braiding or intertwining reinforcing warp threads (80) and reinforcing weft threads (82), and being wrapped around the outer surface side of the rubber layer (16), so that the threads reinforcing warp (80) and the reinforcing weft yarns (82) are oriented at an angle inclined with respect to a longitudinal direction of the vibration absorbing hose (66), respectively.   10. A vibration absorption hose according to any one of claims 1 to 9, characterized in that it further comprises: a resin membrane (86) laminated in an inner surface of the rubber layer (16), or on an outer surface of the rubber layer (16) and in an inner side of the pressure-resistant reinforcing layer (18), the resin membrane 20 (86) having a thickness of 50 gm to 250 gm.   11. A vibration absorption hose according to any one of claims i to 10, characterized in that the rubber layer (16) has a greater wall thickness in the corrugation peaks (60) of the corrugations ( 12, 54) than in the corrugation valleys (62) thereof.   12. A vibration absorbing hose according to claim 11, characterized in that the wall thickness of the rubber layer (16) in the peaks of wave (60) of the waves (12, 54) is designed 1 , 2 to 6 times as large as that of the undulating valleys (62) thereof.   13. Vibration absorption hose according to any one of claims i to 7, characterized in that the pressure-resistant reinforcing layer (18, 56) is formed by arranging the reinforcing thread (s) (22) on a generally equal arrangement angle in the corrugation peaks (60) and the corrugation valleys (62) of the corrugations (12, 54).   14. Vibration absorption hose according to any one of claims i to 13, characterized in that a burst pressure of the vibration absorption hose (10, 30, 52, 66, 84, 110) is a minimum of 1 MPa.   15. A flexible vibration absorption according to any one of claims 1 to 14, characterized in that it further comprises: a covering layer (20) laminated on an outer surface side of the reinforcing layer 15 resistant pressure (18, 56, 68).   16. Vibration absorption hose according to any one of claims 1 to 15, characterized in that the construction of the vibration absorption hose (10, 30, 52, 66, 84, 110) is suitable for a pipe hose to be arranged in an engine compartment of a motor vehicle.