JP2009137190A - Apparatus and method for manufacturing hose for high pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive manufacturing apparatus of simple constitution for manufacturing a hose for high pressure and a manufacturing method for manufacturing the hose for high pressure at low cost with simple constitution. <P>SOLUTION: A mandrel 12 is rotated by rotating a chuck 1402, and a strip member 8 is delivered in a tensioned state from a drum 16 and spirally wound on the mandrel 12. In order to wind the strip member 8 spirally on the mandrel 12 without a clearance, the drum 16 is moved through a driving part 24 and a drum support base 18, interlocked with the movement of parts where the strip member 8 is wound onto the mandrel 12, and four omni-wheels 26 are also moved through connecting members 34 and an omni-wheel support base 28. The tension of the strip member 8 is applied to the mandrel 12, and the mandrel 12 is going to bend but is prevented from bending by a total of four omni-wheels 26 abutting on the mandrel 12 on both sides of the wound part of the strip member 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a manufacturing apparatus and a manufacturing method for a high-pressure hose.

Conventionally, a high-pressure hose has a plurality of reels around which a linear member whose wire is coated with unvulcanized rubber is wound so as to be movable around the mandrel in the longitudinal direction of the mandrel. A spiral machine is used in which a linear member is wound around the outer surface of a mandrel from these reels while rotating (Patent Document 1).
JP-A-10-44214

However, since this spiral machine has a complicated structure and is expensive, it has been desired to develop an inexpensive device with a simple configuration in order to manufacture a high-pressure hose.
The inventor of the present invention has been devised in view of the above circumstances, and an object of the present invention is to manufacture a high-pressure hose with a simple configuration and an inexpensive manufacturing apparatus and a high-pressure hose at a low cost. It is to provide a manufacturing method.

In order to achieve the above object, the high-pressure hose manufacturing apparatus of the present invention has a rotating mechanism that rotates while supporting both ends of a mandrel, a plurality of wires arranged parallel to each other at intervals, and the wires embedded therein. A drum on which a belt-shaped member made of unvulcanized rubber is wound, a drum support base that rotatably supports the drum, a braking force is applied to the drum, the drum is rotated, and the belt-shaped member is pulled out. A tension mechanism for applying tension to the belt-like member, a guide mechanism for supporting the drum support base so as to be movable along the longitudinal direction of the mandrel, and the drum support base in the longitudinal direction of the mandrel. A drive mechanism that is moved along the longitudinal direction of the mandrel, and a belt-like member that is wound around the mandrel in the longitudinal direction. A plurality of omni wheels that contact the belt-shaped member wound around the outer peripheral surface and suppress the bending of the mandrel due to the tension of the belt-shaped member, a support base for the omni wheel that supports the plurality of omni wheels, and the belt-shaped member And a drive mechanism that moves the omni wheel support in the longitudinal direction of the mandrel as the member moves around the mandrel.
The present invention also relates to a method for manufacturing a high-pressure hose comprising a reinforcing layer in which a plurality of wires are spirally wound and embedded in a tubular rubber layer, and are arranged in parallel to each other at intervals. Provided with a band-shaped member for forming the reinforcing layer composed of a plurality of wires and unvulcanized rubber in which the wires are embedded, and the band-shaped member is wound around one end in the longitudinal direction of the mandrel, and the longitudinal direction of the mandrel The end of the belt-like member is attached to one end of the mandrel so that it cannot move in the longitudinal direction of the mandrel and rotates integrally with the mandrel, and is wound spirally around the outer peripheral surface of the mandrel in the longitudinal direction of the mandrel An omni wheel is brought into contact with the belt-like member wound around the outer peripheral surface of the mandrel and the outer peripheral surface of the mandrel at both sides of the belt-like member, The mandrel is rotated in a state where force is applied, and the plurality of omni wheels are moved following the movement of the belt-like member wound spirally around the mandrel, and the mandrel is bent by the tension. The reinforcing layer is formed by spirally winding the belt-like member on the mandrel while suppressing the gap.

According to the high pressure hose manufacturing apparatus and manufacturing method of the present invention, the tension of the belt-like member acts on the mandrel, and the mandrel tries to bend, but the omni abuts the mandrel on both sides of the portion where the belt-like member is wound. Stopped by the wheel.
Therefore, a belt-like member can be spirally wound while tension is applied to a mandrel extending linearly without bending, and a reinforcing layer extending linearly without bending can be obtained. It is possible to manufacture a high-pressure hose that extends linearly.

Embodiments of a high pressure hose manufacturing apparatus and manufacturing method according to the present invention will be described below with reference to the drawings.
First, the high-pressure hose manufactured according to the present embodiment will be described.
FIG. 5 is a cross-sectional view of the high-pressure hose.
The high-pressure hose 70 includes an inner rubber layer 72, a reinforcing layer 74, and an outer rubber 76.
The inner rubber layer 72, the reinforcing layer 74, and the outer rubber 76 are configured to include unvulcanized rubber, which is sequentially covered on the mandrel 12 (see FIGS. 1 to 3), and then wrapped for preventing external damage. It is manufactured by pulling out the mandrel 12 after vulcanizing and peeling off the wrapping.
The high pressure hose 70 has, for example, an inner diameter of 19 to 50 mm and a length of 2 to 20 m, and the mandrel 12 has an outer diameter of 19 to 50 mm. The high pressure hose 70 is used, for example, as a high pressure hydraulic hose. The
In the present embodiment, the present invention is applied when the reinforcing layer 74 is formed on the inner rubber layer 72.

As shown in FIGS. 4 and 5, the reinforcing layer 74 is configured by a plurality of wires 7404 being spirally wound and embedded inside a tubular rubber layer 7402.
The reinforcing layer 74 is formed by winding the belt-shaped member 8 shown in FIG. 4 on the inner rubber layer 72 in a spiral shape without applying a gap while applying tension. It may be multiple, such as double, triple, and quadruple.
The band-shaped member 8 includes a plurality of wires 7404 arranged in parallel with each other at intervals, and an unvulcanized rubber layer 7402 covering the wires 7404, and has a rectangular cross section.

Next, an apparatus for manufacturing a high pressure hose will be described.
1 is a plan view of a high pressure hose manufacturing apparatus, FIG. 2 is a front view of the high pressure hose manufacturing apparatus, and FIG. 3 is a side view of an omni wheel portion of the high pressure hose manufacturing apparatus.
A high pressure hose manufacturing apparatus 10 includes a rotating mechanism 14 that rotates while supporting both ends of a mandrel 12, a drum 16 around which a belt-like member 8 is wound, a drum support base 18 that supports the drum 16, and a belt-like member. A tension mechanism 20 for applying tension to the drum 8, a guide mechanism 22 for the drum support base 18, a drive unit 24 for moving the drum support base 18, a plurality of omni wheels 26 for suppressing the bending of the mandrel 12, and an omni wheel. The omni-wheel support base 28 which supports 26, the guide mechanism 30 of the omni-wheel support base 28, and the drive part which moves the omni-wheel support base 28 are provided.

The rotation mechanism 14 includes a chuck 1402 that holds one end of the mandrel 12 in the longitudinal direction, a drive mechanism 1404 that rotates the chuck 1402, and a support mechanism 32 that rotatably supports the other end of the mandrel 12 in the longitudinal direction. Has been.
The support mechanism 32 includes, for example, a rod 3202 having a conical portion fitted in a hole formed at the other end of the mandrel 12, a support mechanism 3204 that rotatably supports the rod 3202, and the support mechanism 3204 on the chuck side. The rod 3202 and the chuck 1402 are aligned with each other.
When the mandrel 12 is rotated by the rotating mechanism 14, the belt-shaped member 8 is drawn out from the drum 16 and wound around the mandrel 12.

As shown in FIG. 1, the drum 16 is arranged with its axis inclined with respect to the longitudinal direction of the mandrel 12 so that the band-like member 8 is spirally wound around the mandrel 12 without a gap. Yes.
In the present embodiment, the belt-like member 8 is wound around the mandrel 12 slightly from below in the horizontal direction so as to be wound around the mandrel 12 from a direction intersecting the vertical direction. Thus, the drum 16 is disposed.

  The drum support base 18 rotatably supports the support shaft of the drum 16 at a position separated in a direction perpendicular to the longitudinal direction of the mandrel 12 in the horizontal direction, and the direction of the drum 16 can be adjusted.

The tension mechanism 20 applies tension to the belt-like member 8 by applying a braking force to the drum 16 when the belt-like member 8 is fed out of the drum 16 by the rotation of the mandrel 12.
The tension mechanism 20 includes, for example, a hydraulic cylinder, a pneumatic cylinder, a link mechanism, and the like, and a brake mechanism that clamps the support shaft of the drum 16 with a brake shoe, or a brake that presses the brake shoe against the inner peripheral surface of the drum 16. Various conventionally known mechanisms such as a mechanism can be employed, and the braking force applied to the drum 16 can be adjusted. Therefore, the tension applied to the belt-like member 8 can also be adjusted.
In the present embodiment, the tension applied to the band-shaped member 8 is, for example, 200N to 300N, or 20N to 30N per one wire 7404.

The drum support base 18 is configured such that the guide mechanism 22 of the drum support base 18 is immovable in the vertical and horizontal directions perpendicular to the longitudinal direction of the mandrel 12 and is movable in a direction parallel to the longitudinal direction of the mandrel 12. Is to support.
The guide mechanism 22 is, for example, two dovetail grooves 2202 provided on the lower surface of the drum support base 18, and engageably engages with the dovetail groove 2202 and extends in a direction parallel to the longitudinal direction of the mandrel 12. Various conventionally known configurations such as two rails 2204 can be employed.

  The drive unit 24 moves the drum support base 18 in the longitudinal direction of the mandrel 12 so that the belt-shaped member 8 is spirally wound around the mandrel 12 without any gap. The drive unit 24 is, for example, a mandrel. Various known configurations such as a male screw member extending in a direction parallel to the longitudinal direction of 12 and screwed into the drum support base 18 and a motor capable of rotating the male screw member forward and backward are adjustable. Can be adopted.

The omni wheel 26 suppresses the bending of the mandrel 12, and two omni wheels 26 are arranged on both sides of the portion where the belt-like member 8 is wound around the mandrel 12 in the longitudinal direction of the mandrel 12, and at least four in total. Has been.
In the present embodiment, as shown in FIG. 3, the band-shaped member 8 is wound around the mandrel 12 slightly from below in the horizontal direction. On both sides, one of the two omni wheels 26 contacts the side surface of the mandrel 12 outer peripheral surface, and the other one contacts the lower surface of the mandrel 12 outer peripheral surface.
The omni wheel 26 that contacts the side surface of the outer peripheral surface of the mandrel 12 prevents the mandrel 12 from being bent due to the tension of the band-shaped member 8.
The omni wheel 26 that contacts the lower surface of the outer peripheral surface of the mandrel 12 prevents the mandrel 12 from being bent due to its own weight. If the outer diameter of the mandrel 12 is large or the bending due to its own weight is negligible, the omni wheel 26 that contacts the lower surface of the outer surface of the mandrel 12 can be omitted, but as in the embodiment. If two omni wheels 26 are disposed on both sides of the portion where the belt-like member 8 is wound around the mandrel 12 in the longitudinal direction of the mandrel 12, the mandrel 12 is bent due to the tension of the belt-like member 8 and the mandrel 12. This is advantageous in preventing the bending due to its own weight in a more stable state.
The omni wheel 26 is configured to be able to roll in both the longitudinal direction and the circumferential direction of the mandrel 12 while being in contact with the outer peripheral surface of the mandrel 12. For example, a commercial product of Tosa Electronics Co., Ltd. can be used.

The omni wheel support 28 includes four support shafts that support the four omni wheels 26, and the position of each omni wheel 26 is configured to be adjustable in the radial direction of the mandrel 12. Various types of conventionally known configurations can be employed for the support structure of the omni wheel 26.
The omni wheel support base 28 is disposed below the mandrel 12 in the present embodiment.

The guide mechanism 30 of the omni-wheel support 28 is omni-wheel support so that it cannot move in the vertical direction and the left-right direction, which are perpendicular to the longitudinal direction of the mandrel 12, and is movable in a direction parallel to the longitudinal direction of the mandrel 12. The base 28 is supported.
The guide mechanism 30 includes, for example, two dovetail grooves 3002 provided on the lower surface of the omni wheel support base 28, and engages with the dovetail groove 3002 so as to be engaged with the mandrel 12 and extend in a direction parallel to the longitudinal direction of the mandrel 12. Various known configurations such as two rails 3004 can be adopted.

The drive portion of the omni wheel support base 28 moves the omni wheel 26 in the longitudinal direction of the mandrel 12 by following the movement of the portion where the belt-like member 8 is wound around the mandrel 12.
In the present embodiment, the drum support base 18 and the omni wheel support base 28 are connected by the connecting member 34 so as to move integrally in the longitudinal direction of the mandrel 12, and the drive unit of the drum support base 18 is connected. 24 also serves as a drive unit for the drum support base 18. Therefore, both the drum support base 18 and the drum support base 18 are moved at the same speed along the longitudinal direction of the mandrel 12 by the single drive unit 24. Moved.
The rotation speed of the chuck 1402 by the driving mechanism 1404, the moving speed of the drum support base 18 by the driving unit 24, the pressing force of the rod 3202 on the mandrel 12 by the hydraulic cylinder or the pneumatic cylinder 3206, and the drum 16 by the tension mechanism 20 The braking force is controlled by the control unit.

According to the high pressure hose 70 manufacturing apparatus 10 having such a configuration, the belt-like member 8 is wound on the mandrel 12 covered with the inner rubber layer 72 as follows.
First, one end in the longitudinal direction is held by the chuck 1402 and the other end in the longitudinal direction is wound around the end of the mandrel 12 supported by the rod 3202 in a spiral manner, for example, a plurality of times. . Then, the end of the band-shaped member 8 is attached to the mandrel 12 using a tape or the like so that it cannot move in the longitudinal direction of the mandrel 12 and rotates integrally with the mandrel 12.

Next, the position of the omni wheel 26 with respect to the mandrel 12 is adjusted.
That is, the two omni wheels 26 that come into contact with the mandrel 12 on the rod 3202 side with respect to the place where the belt-like member 8 is wound are positioned so as to contact the outer peripheral surface of the belt-like member 8 that has already been wound. .
Further, the two omni wheels 26 that come into contact with the mandrel 12 on the chuck 1402 side with respect to the place where the belt-like member 8 is wound are positioned so as to come into contact with the outer peripheral surface of the inner rubber layer 72 that covers the mandrel 12. Is done.
Further, a predetermined braking force is applied to the drum 16 by the tension mechanism 20.

Next, the chuck 1402 is rotated.
When the chuck 1402 is rotated, the mandrel 12 is rotated, and the belt-like member 8 is fed out from the drum 16 in a state where tension is applied, and is wound around the mandrel 12 in a spiral shape.
The drum 16 is connected to the drive unit 24 and the drum 16 in conjunction with the movement of the portion where the belt-like member 8 is wound around the mandrel 12 so that the belt-like member 8 is spirally wound on the mandrel 12 without a gap. It is moved via the support base 18.
The four omni wheels 26 are also moved via the connecting member 34 and the omni wheel support 28 in conjunction with the movement of the portion where the belt-like member 8 is wound around the mandrel 12.

The tension of the belt-like member 8 acts on the mandrel 12, and the mandrel 12 tries to bend, but is blocked by the two omni wheels 26 that come into contact with the side surface of the mandrel 12 on both sides of the place where the belt-like member 8 is wound. The
In the present embodiment, the two omni wheels 26 that contact the lower surface of the mandrel 12 on both sides of the portion around which the belt-shaped member 8 is wound prevent the mandrel 12 from being bent by its own weight.
Therefore, the belt-like member 8 is wound spirally around the mandrel 12 extending linearly without bending.
In this way, the belt-like member 8 is wound by one layer or a plurality of layers, and then the outer rubber 76 is coated and vulcanized, and then the mandrel 12 is pulled out by various conventionally known methods.
When the belt-shaped member 8 is provided in a plurality of layers, when the belt-shaped member 8 reaches the end of the mandrel 12, the height of the omni wheel 26 is changed, and the direction of the drum 16 is changed. The belt-like member 8 is wound on the already-rolled belt-like member 8 by moving the drum support base 18 and the omni-wheel support base 28 in the opposite directions while rotating the mandrel 12.

According to the present embodiment, the mandrel 12 can be maintained in a straight line despite the fact that the belt-like member 8 is wound while tension is applied to the mandrel 12 having an extremely large length compared to the cross-sectional area. Since the belt-like member 8 can be spirally wound while applying tension while maintaining the mandrel 12 in a straight line without bending, a reinforcing layer 74 extending in a straight line without bending is obtained. It is possible to manufacture the high-pressure hose 70 that does not bend and extends linearly with an inexpensive configuration.
Further, according to the present embodiment, since the bending of the mandrel 12 due to its own weight can be prevented, it is more advantageous in manufacturing the high-pressure hose 70 that does not bend and extends linearly.
Moreover, according to this Embodiment, the spiral pitch precision of the strip | belt-shaped member 8 can be maintained with high precision, and it becomes advantageous when manufacturing the high quality high-pressure hose 70.

It is a top view of the manufacturing apparatus of the hose for high pressures. It is a front view of the manufacturing apparatus of the hose for high pressures. It is a side view of the omni wheel part of the manufacturing apparatus of the high pressure hose. It is a perspective view of a strip-shaped member. It is sectional drawing of the hose for high pressures.

Explanation of symbols

  8 ... Manufacturing apparatus for high-pressure hose, 12 ... Mandrel, 14 ... Rotation mechanism, 16 ... Drum, 18 ... Drum support, 20 ... Tension mechanism, 22 ... Guide Mechanism: 24 ... Drive unit, 26 ... Omni wheel, 28 ... Omni wheel support, 30 ... Guide mechanism, 70 ... High pressure hose, 72 ... Inner rubber layer, 74 ... Reinforcement layer.

Claims (8)

A rotation mechanism that rotates while supporting both ends of the mandrel;
A drum on which a plurality of wires arranged in parallel with each other at intervals and a belt-shaped member made of unvulcanized rubber in which these wires are embedded are wound;
A drum support that rotatably supports the drum;
A tension mechanism that applies a braking force to the drum and applies tension to the belt-like member when the drum is rotated and the belt-like member is pulled out;
A guide mechanism for supporting the drum support base in a movable manner along the longitudinal direction of the mandrel;
A drive mechanism for moving the drum support along the longitudinal direction of the mandrel;
At both side portions of the belt-shaped member wound around the outer peripheral surface of the mandrel in the longitudinal direction of the mandrel, the outer surface of the mandrel and the belt-shaped member wound around the outer peripheral surface are contacted, and the tension due to the belt-shaped member Multiple omni wheels to suppress mandrel deflection,
An omni wheel support for supporting the plurality of omni wheels;
A drive mechanism for moving the omni wheel support base in the longitudinal direction of the mandrel as the belt-shaped member is wound around the mandrel;
A high pressure hose manufacturing apparatus comprising: Due to the mandrel's own weight, it contacts the lower surface of the mandrel and the lower surface of the belt-like member wound around the outer peripheral surface at both sides of the belt-like member wound around the outer peripheral surface of the mandrel on the omni wheel support base. An omni wheel that suppresses bending is provided,
The apparatus for manufacturing a high-pressure hose according to claim 1. The drum support and the omni wheel support are connected so as to move integrally along the longitudinal direction of the mandrel,
The drive mechanism for the drum support serves as the drive mechanism for the omni wheel support,
The apparatus for manufacturing a high-pressure hose according to claim 1. The drum support and the omni wheel support are moved at the same speed,
The apparatus for manufacturing a high-pressure hose according to claim 1. A method for producing a high-pressure hose comprising a reinforcing layer in which a plurality of wires are spirally wound and embedded inside a tubular rubber layer,
A strip-shaped member for forming the reinforcing layer is provided, which includes a plurality of wires arranged in parallel with each other at intervals, and an unvulcanized rubber in which the wires are embedded,
The belt-like member is wound around one end in the longitudinal direction of the mandrel, and the end of the belt-like member is attached to the one end in the longitudinal direction of the mandrel so that it cannot move in the longitudinal direction of the mandrel and rotates integrally with the mandrel,
In both side portions of the band-shaped member spirally wound around the outer peripheral surface of the mandrel in the longitudinal direction of the mandrel, the band-shaped member wound around the outer peripheral surface of the mandrel, and the outer peripheral surface of the mandrel, Contact each omni wheel,
The mandrel is rotated in a state where tension is applied to the belt-like member, and the plurality of omni wheels are moved following the movement of the belt-like member wound spirally around the mandrel, and the tension is applied to the belt-like member. The band-shaped member is wound spirally on the mandrel while preventing the mandrel from bending, and the reinforcing layer is formed.
A method of manufacturing a high-pressure hose characterized by the above. The belt-like member is wound around the mandrel from a direction intersecting the vertical direction,
In both side portions of the belt-like member spirally wound around the outer surface of the mandrel in the longitudinal direction of the mandrel, the lower surface of the belt-like member wound around the mandrel and the lower surface of the mandrel, respectively Contact an omni wheel different from the omni wheel,
The other omni wheel is moved following the movement of the band-shaped member spirally wound around the mandrel, and the band-shaped member is wound on the mandrel while suppressing bending due to the weight of the mandrel. Like,
The method for producing a high-pressure hose according to claim 5. A drum around which the belt-like member is wound, and a drum support that rotatably supports the drum;
The tension is applied to the belt-like member by applying a braking force to the drum when the belt-like member is pulled out of the drum and the drum rotates.
The method for producing a high-pressure hose according to claim 5. The high-pressure hose has an inner rubber layer inside the reinforcing layer,
The inner rubber layer is covered on the mandrel,
The omni wheel is formed in the longitudinal direction of the mandrel, on both sides of the belt-shaped member spirally wound on the outer circumferential surface of the mandrel, and the belt-shaped member wound on the outer circumferential surface of the mandrel, and the mandrel In contact with the outer peripheral surface of the covered inner rubber layer,
The method for producing a high-pressure hose according to claim 5.

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