JP2013216982A - Braiding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress displacement of a core material, precisely braid a wire material and prevent braiding failure.SOLUTION: A braiding machine 10 comprising a plurality of bobbins 11 supplying wire materials 3 from an outer side of its diameter direction toward an outer peripheral surface of a core material 2 being transferred in an axial direction, the machine for braiding the wire materials supplied from the respective bobbins on the outer peripheral surface of the core material, comprises a cylindrical guide unit 18 disposed on the upstream side of a braiding start point, at which the ware materials are started to be braided on the outer peripheral surface of the core material, in the transfer direction of the core material, the unit having the inside through which the core material passes. The guide unit is formed in such a concave surface shape that its inner peripheral surface is brought into slidable contact with the outer peripheral surface of the core material and its outer peripheral surface is gradually reduced in diameter from the upstream side to the downstream side in the transfer direction, and guides the wire materials to the braiding start point along the transfer direction while bringing the wire materials into slidable contact with its outer peripheral surface.

Description

  The present invention relates to a braiding machine.

When manufacturing a reinforcing hose represented by a wire blade hose, a braiding machine is used to braid a reinforcing wire (metal wire, etc.) on the outer circumference of the inner tube covered on a mandrel made of rubber or resin. The method to do is generally made.
The braiding machine is provided with a plurality of bobbins that are wound in a small number in a state in which several wires are combined in advance. Each of these bobbins is set on a carrier provided so as to be able to run along a running groove formed on the face plate. Then, as the carrier travels, the wires are braided by revolving the surface of the bobbin into a figure of 8 while crossing each other.

  By the way, the wire wound around each bobbin is likely to vary in the length of the wire from the bobbin to the braiding point due to variations in tension when the yarns are combined. Therefore, if the braiding is performed in this state, the braids are likely to be uneven. Therefore, a tension device is provided on the carrier that revolves while crossing the face board alternately in the shape of figure 8, and braiding is performed while applying a predetermined tension (for example, about 100 N) to a bundle of combined yarns. The method is known.

  According to this method, it is possible to perform braiding with a uniform arrangement. However, even in this case, it is practically difficult to make the tension value between the carriers uniform. This is because, for example, tension values are likely to vary during operation due to wear of the tension device, temperature, and the like.

  As a result, it is difficult to control the tension of the wires fed out from the plurality of bobbins, and wires with different tensions are braided on the mandrel and the inner layer tube. Therefore, the wire was easily braided while the mandrel and the inner layer tube vibrated in the vertical and horizontal directions (direction orthogonal to the transfer direction). If braided in this way, problems such as poor braiding, overlapping of wires, and disconnection occur. Therefore, improvement of such a braiding defect is desired.

  As one of the improvement measures, there is known a method of suppressing the mandrel and the inner layer tube from shaking by disposing a ring-shaped guide bush outside the braided point in the radial direction (see Patent Document 1).

JP-A-7-195537

However, the following problems remain in the method using the guide bush described in Patent Document 1.
Usually, when braiding is performed, at the beginning of the knitting, the wire fed from the bobbin is manually bound to the inner layer tube. At this time, it is necessary to wind and secure a large number of wires so that the wires are not pulled from the inner layer tube due to the tension of the carrier. Therefore, at present, the outer diameter of the tying portion is larger than the final knitting diameter.

Therefore, when the guide bush is provided, the guide bush is worn by the securing portion, and it is difficult to effectively suppress the deflection. For this reason, there was a risk that the braid would be defective.
If the inner diameter of the guide bush is made larger than the above braided diameter, a gap is generated between the guide bush and the interior tube, and there is a problem that the deflection becomes excessively large.

  The present invention has been made in view of such circumstances, and its purpose is to braid the core material so that it is possible to suppress runout of the core material, and to braid the wire material with high accuracy and to prevent a braid failure. Is to provide a machine.

In order to achieve the above object, the present invention provides the following means.
(1) A braiding machine according to the present invention includes a plurality of bobbins for feeding a wire from the outside in the radial direction toward an outer peripheral surface of a core material transferred in the axial direction, and each bobbin on the outer peripheral surface of the core material. A braiding machine for braiding the wire drawn out from the braiding start point at which the wire starts to be braided on the outer peripheral surface of the core, and is arranged on the upstream side in the transfer direction in which the core is transferred, The guide device includes a cylindrical guide device through which the core material passes, the inner peripheral surface of which is slidably contacted with the outer peripheral surface of the core material, and the outer peripheral surface is located downstream from the upstream side in the transfer direction. It is formed in the shape of a concave curved surface that is gradually reduced in diameter, and is guided to the braiding start point along the transfer direction while sliding the wire rod on the outer peripheral surface.

According to the braiding machine according to the present invention, the guide device is disposed upstream of the braid start point in the core material transfer direction, and guides to the braid start point while bringing the wire rod into sliding contact with the outer peripheral surface. The wire can be braided at a portion of the material that is located downstream of the guide device in the transfer direction. Therefore, the core material after the wire is braided does not pass through the inside of the guide device.
Therefore, at the initial stage of braiding the wire to the outer peripheral surface of the core, even if the wire is tied thickly in order to be firmly bound to the core, it is necessary to increase the inner diameter of the guide device accordingly. There is no. Thereby, a core material can be slidably contacted with the inner peripheral surface of a guide apparatus, the shake of a core material can be suppressed, and the attitude | position can be stabilized.

In particular, the outer peripheral surface of the guide device is formed in a concave curved shape that gradually decreases in diameter as it goes from the upstream side to the downstream side in the transfer direction, so that the wire rod fed from each bobbin is directed toward the outer peripheral surface of the core material. For example, it is possible to guide smoothly and smoothly without bending or the like. Therefore, also in this point, the wire can be braided without applying an extra load to the core, and the deflection of the core can be suppressed.
As a result, the wire can be braided with high accuracy with respect to the core material, and a high-quality braided body with a good knitting shape can be obtained by preventing braiding defects.

(2) In the braiding machine according to the present invention, it is preferable that the guide device is formed in an outer shape so that the wire is pressed against the outer peripheral surface.

  In this case, since the wire rod fed out from each bobbin can be guided to the braiding start point while being pressed against the outer peripheral surface of the guide device, the wire rod is more reliably wound around the core material, and it is easier to braid. A braided body can be obtained. Moreover, the runout of the core material can be further reliably suppressed.

(3) In the braiding machine according to the present invention, a reinforcing cylinder portion extending continuously while maintaining a predetermined thickness toward the downstream side in the transfer direction is continuously provided at the downstream end in the transfer direction of the guide device. It is preferable.

  In this case, since the reinforcing cylinder portion is provided, deformation or breakage of the downstream end portion in the transfer direction in the guide device can be suppressed. Therefore, it can be used stably over a long period of time.

(4) In the braiding machine according to the present invention, the reinforcing cylinder portion is formed in a cross-sectional taper shape whose outer peripheral surface is gradually reduced in diameter from the upstream side to the downstream side in the transfer direction. preferable.

  In this case, the wire rod fed out from each bobbin and slidably contacted by the outer peripheral surface of the guide device can be vigorously guided to the core material side by using the taper slope in the reinforcing cylinder portion at the last stage. Therefore, it is possible to braid while winding the wire rod so as to bite the core material downstream of the braid start point in the transfer direction. Thereby, while being able to braid a wire material still more reliably, it is easy to suppress the runout of a core material effectively using the stress at the time of biting.

  According to the braiding machine according to the present invention, the deflection of the core material can be suppressed, the wire can be braided with respect to the core material with high accuracy, and the braiding failure can be prevented.

It is sectional drawing of the wire blade boose manufactured with the braiding machine which concerns on this invention. It is a block diagram of the braiding machine which concerns on this invention. FIG. 3 is an enlarged cross-sectional view of the vicinity of a mouth metal fitting of the braiding machine shown in FIG. It is a figure for demonstrating the locus | trajectory until the wire drawn | fed out from a bobbin reaches an inner layer tube. It is a partial expanded sectional view of the 1st metal fitting in the base metal fitting shown in FIG.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
The braiding machine of this embodiment is an apparatus for manufacturing a wire blade hose (braided body) 1 shown in FIG.

(Wire blade hose)
First, the wire blade hose 1 will be briefly described.
The wire blade hose 1 may include an inner layer tube (core material) 2 and a reinforcing layer 4 formed by braiding a plurality of wires 3 in a predetermined pattern on the outer peripheral surface of the inner layer tube 2. It is a flexible reinforcing hose. Examples of this type of wire blade hose 1 include a fuel hose, a fluid hose, a lubricating oil hose, a hydraulic oil hose, and the like.

  The inner layer tube 2 is made of, for example, rubber or resin, and is a long tube having a predetermined outer diameter and no seam. Examples of the wire 3 include one metal wire, or a metal wire in which a plurality of these metal wires are combined (twisted). Furthermore, the wire 3 may be made of a material other than metal, and may be a fibrous body made of nylon, Kevlar (registered trademark), or the like.

(Braiding machine)
Next, the braiding machine of this embodiment will be described.
As shown in FIG. 2, the braiding machine 10 includes a plurality of bobbins 11 that feed out the wire 3 from the outside in the radial direction toward the outer peripheral surface of the inner layer tube 2 that is transported in the axial direction. This is an apparatus for braiding the wire rod 3 fed out from each bobbin 11 on the outer circumferential surface with a predetermined stitch.

  The inner layer tube 2 is covered with, for example, a mandrel (not shown), and is transferred in a certain direction by a pair of traction devices 12 and 13 disposed before and after the braiding machine 10 in the transfer direction. In the present embodiment, the inner tube 2 is transferred from one traction device 12 toward the other traction device 13. Further, a direction orthogonal to the central axis O of the inner tube 2 is referred to as a radial direction, and a direction around the central axis O is referred to as a circumferential direction.

  The braiding machine 10 is supported by a face plate 15, a plurality of carriers 16 mounted on the face plate 15 so as to be able to run along a running groove (not shown) formed in the face plate 15, and the carrier 16. The bobbin 11 around which the wire 3 is wound, the bradering ring 17 disposed downstream of the bobbin 11 in the transport direction of the inner tube 2, and further disposed downstream of the bradering ring 17 in the transport direction. A mouth metal fitting (guide device) 18 provided.

The face plate 15 is a steel plate formed in a circular shape centering on the central axis O, and an insertion hole 15a through which the inner layer tube 2 is inserted is formed at the center. The face plate 15 is formed with an annular running groove having an annular shape of a continuous 8-shape so as to surround the insertion hole 15a. And as above-mentioned, the some carrier 16 is attached so that it can revolve in the shape of figure 8, crossing alternately along this running groove.
Further, these carriers 16 incorporate a tension device (not shown) that applies a predetermined tension to the wire 3 fed out from the bobbin 11.

The brader ring 17 is a ring member disposed coaxially with the central axis O. In the illustrated example, the brader ring 17 is integrally connected to the outer peripheral edge of the annular plate 20 formed around the central axis O. Yes. The wire rod 3 fed out from each bobbin 11 is brought into contact with the outer peripheral portion of the brader ring 17 and fed toward the inner tube 2 at a predetermined bending angle while being slid.
The annular plate 20 is disposed coaxially with the central axis O, and is fixed to a flange portion 21 a of a cylindrical first connecting cylinder portion 21 connected to the face plate 15.

As shown in FIGS. 2 and 3, the base metal fitting 18 is composed of a first metal fitting 30 and a second metal fitting 31, and is formed in a cylindrical shape through which the inner layer tube 2 passes. As described above, the end fitting 18 is disposed downstream of the brader ring 17 in the transfer direction, but upstream of the braiding start point P at which the wire 3 starts to be braided on the outer peripheral surface of the inner layer tube 2. Located on the side.
The base metal fitting 18 is made of, for example, metal or ceramic, and is made of a material having high hardness. Thereby, it is set as the design which is hard to wear by abrasion with the wire 3 and the inner layer tube 2. FIG.

The first metal fitting 30 is a cylindrical member that surrounds the inner layer tube 2 from the outside in the radial direction, and has an inner diameter that is slightly larger than the outer diameter of the inner layer tube 2 (for example, around 1 mm). Thereby, the inner peripheral surface of the first metal fitting 30 is in sliding contact with the outer peripheral surface of the inner layer tube 2 to suppress the shake of the inner layer tube 2.
The inner peripheral surface of the first metal fitting 30 has a fine surface finish, for example, a mirror finish.

  The second metal fitting 31 is a cylindrical member that surrounds the first metal fitting 30 from the outside in the radial direction, is disposed coaxially with the central axis O, and is connected to the flange portion 21 a of the first connecting cylinder portion 21. The second connecting cylinder portion 22 is fixed to the flange portion 22a.

  By the way, the 1st metal fitting 30 is made into the exchangeable member combined with the 2nd metal fitting 31 so that isolation | separation is possible from the upstream of a transfer direction. At this time, the first metal fitting 30 is combined with the second metal fitting 31 so as to be non-rotatable in the circumferential direction, and the claw portion 31a formed on the second metal fitting 31 is prevented from coming off downstream in the transfer direction. Further, the flange portion 22a prevents the upstream of the transfer direction from coming off. And this 1st metal fitting 30 can be suitably replaced | exchanged for the size which has the optimal internal diameter according to the outer diameter of the inner layer tube 2, etc. FIG.

Further, the end fitting 18 plays a role of guiding the wire 3 bent by the brader ring 17 to the braiding start point P along the transfer direction while sliding on the outer peripheral surface. This point will be described in detail.
A part of the outer peripheral surface of the second metal fitting 31 is, for example, mirror-finished like the inner peripheral surface of the first metal fitting 30, and is a guide surface 31b that gradually decreases in diameter from the upstream side to the downstream side in the transfer direction. ing. In the illustrated example, the guide surface 31 has a concave curved surface shape, but may have a tapered cross section.

  The outer peripheral surface 30a of the first metal fitting 30 is, for example, mirror-finished like the inner peripheral surface of the first metal fitting 30, and is formed in a concave curved surface shape that is gradually reduced in diameter from the upstream side to the downstream side in the transfer direction. ing. Specifically, it is formed in a concave curved surface shape that matches or approximates the following trajectory.

First, as shown in FIG. 4, the wire 3 bent in contact with the outer peripheral portion of the brader ring 17 is assumed to have an incident angle with respect to the central axis O of the inner tube 2 assuming that the end fitting 18 is not provided. It is considered that the approach is made while maintaining θ.
However, in actuality, the wire 3 is drawn on the inner layer while drawing the locus M shown by the solid line due to the influence of various conditions such as the outer diameter of the inner layer tube 2, the incident angle θ, the transfer speed of the inner layer tube 2, the feeding speed of the wire 3. Experience has shown that the tube 2 is approached.

Therefore, the trajectory M is calculated based on the various conditions, and the outer peripheral surface 30a of the first metal fitting 30 is formed on the concave curved surface so as to match or approximate the calculated trajectory M. Further, the guide surface 31b of the second metal fitting 31 is also formed so as to coincide with or approximate the locus M.
Thereby, as shown in FIG. 3, the wire 3 is not only slidably contacted with the guide surface 31b of the second metal fitting 31 and the outer circumferential surface 30a of the first metal fitting 30, but the braiding start point. Guided to P.

By the way, it is ideal to form the outer peripheral surface 30a of the first metal fitting 30 so as to match or approximate the locus M to the downstream end in the transfer direction. In this case, the thickness on the downstream end side in the transfer direction is extremely thin. Thus, it becomes difficult to ensure rigidity.
Therefore, as shown in FIG. 5, the first metal fitting 30 of the present embodiment is connected to a reinforcing cylinder portion 32 extending at a downstream end in the transfer direction while maintaining a predetermined thickness toward the downstream side in the transfer direction. It is installed. At this time, the outer peripheral surface 32a of the reinforcing cylindrical portion 32 is a tapered surface having a tapered section that is gradually reduced in diameter from the upstream side to the downstream side in the transfer direction while approximating the curvature of the locus M as much as possible. Yes.
Thereby, it is possible to guide the position of the braiding start point P of the wire rod 3 to a position shifted to the downstream side in the transport direction by a distance H from the theoretical braiding start point P1 located on the trajectory M. ing.

(Operation of braiding machine)
Next, when the braiding machine 10 configured as described above is used, the reinforcing member 4 is formed by braiding the wire 3 on the outer peripheral surface of the inner layer tube 2, and the wire blade hose 1 shown in FIG. Will be described.

  First, as a preparatory work before starting the braiding, the wire 3 wound around each bobbin 11 is pulled out, wound around the inner layer tube 2 and secured. At this time, it is preferable to bind the wire 3 by, for example, wrapping the wire 3 multiple times to perform strong lashing.

  After the lashing is completed, as shown in FIG. 2, a plurality of carriers 16 are moved along the running grooves of the face plate 15 while the inner tube 2 is transferred at a predetermined transfer speed by a pair of traction devices 12 and 13. Let it run. As a result, the bobbins 11 revolve on the face plate 15 in the shape of figure 8 while crossing each other, so that the wire 3 fed out from each bobbin 11 is wound around the outer peripheral surface of the inner tube 2 with a predetermined stitch. can do. Thereby, the wire blade hose 1 can be produced.

  By the way, in the above-described braiding, the wire rod 3 fed out from the bobbin 11 is bent by the brader ring 17, and then starts braiding while being in sliding contact with the outer peripheral surface of the base metal fitting 18 as shown in FIG. Guided to point P. Therefore, the wire 3 can be braided in a portion of the inner layer tube 2 that is located on the downstream side in the transfer direction with respect to the mouthpiece 18. Therefore, the inner layer tube 2 after the wire rod 3 is braided does not pass through the inner side of the mouthpiece 18.

  Therefore, in the above preparation work, even if the wire 3 is bound thickly so as to be firmly bound to the inner layer tube 2, for example, the wire blade hose 1 is bound to have a larger diameter than the finished outer diameter, In addition, it is not necessary to increase the inner diameter of the base metal fitting 18. Thereby, the inner layer tube 2 can be slidably contacted with the inner peripheral surface of the first metal fitting 30 in the base metal fitting 18, and the inner layer tube 2 can be prevented from swinging and its posture can be stabilized.

  In particular, since the outer peripheral surface 30a of the first metal fitting 30 in the base metal fitting 18 is formed in a concave curved surface shape, the wire rod 3 fed out from each bobbin 11 is bent toward the outer peripheral surface of the inner tube 2 for example. It is possible to guide smoothly without unreasonableness. Accordingly, also in this respect, the wire 3 can be braided without applying an extra load to the inner layer tube 2, and the deflection of the inner layer tube 2 can be suppressed.

From the above, the wire rod 3 can be braided with high accuracy with respect to the inner layer tube 2, and a high-quality wire blade hose 1 with a good knitting shape can be obtained by preventing braiding defects.
In addition, since the outer peripheral surface 30a of the first metal fitting 30 is formed so as to match or approximate the locus M described above, the wire rod 3 can be guided to the braiding start point P while being pressed against the outer peripheral surface 30a. Therefore, the wire rod 3 can be more reliably wound around the inner layer tube 2 to be braided, and the wire blade hose 1 having a better knitted shape can be obtained. Further, the shake of the inner layer tube 2 can be more reliably suppressed.

Further, as shown in FIG. 5, a reinforcing cylinder portion 32 whose outer peripheral surface 32 a is a tapered surface is connected to the first metal fitting 30 in the base metal fitting 18. Therefore, the wire 3 slidably contacted by the outer peripheral surface of the base metal fitting 18 can be vigorously guided to the inner tube 2 side using the inclination of the tapered surface (outer peripheral surface 32a) at the final stage. Accordingly, the wire 3 can be braided while being wound around the inner layer tube 2 on the downstream side at a distance H (for example, about several mm) away from the theoretical braid start point P1.
Thereby, while being able to braid the wire 3 much more reliably, it is easy to effectively suppress the shake of the inner layer tube 2 by using the stress at the time of biting.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the wire blade hose 1 is a hose including the inner layer tube 2 and the reinforcing layer 4, but the outer peripheral surface of the reinforcing layer 4 is further coated with an outer layer tube made of rubber or synthetic resin. A hose having a structure may be used.
Moreover, after forming the reinforcement layer 4, you may form the reinforcement layer 4 in multiple by braiding the wire 3 on the outer peripheral surface further.

  In the above embodiment, the wire blade hose 1 has been described as an example. However, the present invention is not limited to the hose, and the present invention can be applied as long as the wire is braided on the core. For example, the core member may be a solid member such as a central conductor such as a coaxial cable.

P ... Braiding start point 1 ... Wire blade hose (braided body)
2 ... Inner layer tube (core material)
3 ... Wire rod 10 ... Braiding machine 11 ... Bobbin 18 ... Mouth fitting (guide device)
32 ... Reinforcing cylinder

Claims (4)

A braiding machine that includes a plurality of bobbins that feed the wire from the outside in the radial direction toward the outer peripheral surface of the core material that is transported in the axial direction, and that braids the wire material fed from each bobbin to the outer peripheral surface of the core material. There,
A cylindrical guide device that is disposed upstream of a braiding start point at which the wire starts to be braided on the outer peripheral surface of the core material, and is disposed upstream of the transfer direction in which the core material is transferred, and through which the core material passes. Prepared,
The guide device includes:
The inner peripheral surface is slidably contacted with the outer peripheral surface of the core member, and the outer peripheral surface is formed in a concave curved surface shape whose diameter is gradually reduced from the upstream side to the downstream side in the transfer direction, and the wire rod is formed on the outer peripheral surface. A braiding machine that guides to the braiding start point along the transfer direction while sliding up. The braiding machine according to claim 1,
The guide device is formed with an outer shape so that the wire is pressed against the outer peripheral surface. In the braiding machine according to claim 1 or 2,
The braiding machine is characterized in that a reinforcing cylinder portion extending continuously while maintaining a predetermined thickness toward the downstream side in the transfer direction is connected to the downstream end of the guide device in the transfer direction. The braiding machine according to claim 3,
The braiding machine is characterized in that the reinforcing cylinder portion is formed in a cross-sectional taper shape whose outer peripheral surface is gradually reduced in diameter from the upstream side to the downstream side in the transfer direction.

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