JPH10166046A - Manufacture of interlock type flexible tube, and its manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of an interlock type flexible tube capable of efficiently forming the diameter with excellent accuracy, and its manufacturing device. SOLUTION: In manufacturing an interlock type flexible tube, a metallic strip 10 for forming a tube is flitted to a tip of a core 12 capable of freely being driven forward and advanced/retracted through a locking mechanism 19, the interlock type flexible tube is formed by winding the metallic strip around the core by the forward drive and advancement of the core 12 while ends of the metallic strip 10 is engaged with each other, and when the core 12 reaches the advancement limit, the locking condition to the metallic strip 10 by the locking mechanism 19 is released and the core 12 is in the reversing condition and driven in the reverse direction in the interlock type flexible tube, and retracted and returned to the initial position. By repeating the actions, the interlock type flexible tube of the prescribed length is formed. The interlock type flexible tube to be fed in the forward driven condition is received in the forward driven condition through a carrying base and a traction means, and loaded and tracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an interlock type flexible tube capable of efficiently forming a diameter with high accuracy, and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a metal tube having elasticity and flexibility is formed by winding a metal strip made of stainless steel or the like in a spiral shape while engaging both ends thereof with each other. Lock type flexible tubes are known.

[0003] Such an interlock type flexible tube is formed by forming a long and flat metal strip 1 having a constant width.
In the pre-treatment step of performing cold roll processing,
(See FIG. 13) or an M-shaped cross section (see FIG. 14). 1b, the both ends of such a metal strip 1 are spirally wound so as to mesh with each other, and the both meshed ends are roll-processed to form an integral tube.

In such a case, as shown in FIG. 15, a metal core 4 is rotatably mounted between the support means 2 and 3 constituting the apparatus main body, and the metal core 4 is pulled out of the uncoiler 5. The band plate 1 is wound around the starting end of the metal core 4, and is fixed to the metal core 4 by being tightened with a tightening band 21 (not shown).

[0005] By moving the uncoiler 5 along the guide rail 6 toward the terminal end (in the direction of the arrow in the figure) while rotating the cored bar 4, the section Z or the section M drawn out from the uncoiler 5 is obtained. Bending plate 1 such as
a. 1b is spirally wound around the cored bar 4 and the ends of the adjacent metal strips 1 are engaged with each other at the time of winding, so that an interlocking flexible tube of a predetermined length is formed. Is formed.

Although not shown, the metal strip 1 is spirally wound around a short rotatable core bar protruding from the apparatus body, and the adjacent ends are engaged with each other.
In some cases, a long interlock-type flexible tube is continuously formed while sequentially extruding the formed short interlock-type flexible tube from a short core.

[0007]

However, in the latter case, since the interlock type flexible tube is continuously extruded from the short core bar, the diameter of the tube becomes uneven. There is a problem that an interlock-type flexible tube having a high-precision diameter cannot be obtained.

[0008] In the former case, since the metal strip, which is a bent plate, is used as the work side, the apparatus becomes large and complicated, and furthermore, the formed interlock type is used. The operation of removing the flexible tube from the core metal, which is the fixed side, is a very laborious operation, and there is a problem that productivity is poor.

For this reason, the applicants have fixed the core metal side around which the metal strip is wound, and the work side is the uncoiler side for feeding the metal strip, but the core metal side is the work side. Based on this configuration, the present inventor has made earnest studies on a method of continuously and efficiently forming an interlocked flexible tube having a high-precision diameter, and has completed the apparatus according to the present application.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of manufacturing an interlock-type flexible tube capable of efficiently forming a diameter with high precision, and to provide a manufacturing apparatus therefor.

[0011]

According to the present invention, in order to achieve the above-mentioned object, a metal strip processed into a bent plate having a cross section Z or a cross section M is provided. In a method of manufacturing an interlock type flexible tube while spirally winding while meshing,
In the forward rotation state, the front end side of the wound metal strip is fastened to the core bar that is arranged in the apparatus body so that it can be rotated forward and backward and can move forward and backward. A fastening mechanism for releasing the fastening is provided, and when the core is rotated forward, the battleship part side of the metal strip wound around the core is fixed through the fastening mechanism and sent out from the pre-processing mechanism. While the coming metal strip is spirally wound around the core, the adjacent ends are engaged with each other to form an interlock type flexible tube, and when the core reaches the advance limit, the advance of the core is stopped. Release the state of fastening to the metal strip by the fastening mechanism, and return to the initial position by reversing the cored bar in the formed interlocking flexible tube and return to the initial position, and repeat the above operation to lengthen the length. With high-precision diameter Characterized by continuously formed while feeding a Rokku type flexible tube.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of an apparatus according to the present invention.

As shown in FIG. 1, a metal core 12 is provided on one side of the apparatus main body 11 so as to be freely rotatable forward and backward and movable forward and backward.
On the other side, a mandrel operating mechanism 16 connected to this mandrel 12
Has been deployed.

For this cored bar 12, bent plates 1a and 1b having a Z-shaped cross section or a M-shaped cross section (see FIGS. 13 and 14).
A metal strip 10 made of stainless steel or the like that has been cold rolled is spirally wound, and at the time of the winding, adjacent ends are engaged with each other to form an interlock type flexible tube. .
That is, the metal strip 10 is stocked in the uncoiler 13 in a wound state.
The metal strip 10 is sent out to the pre-processing mechanism 14 from.

In the pre-processing mechanism 14, the metal strip 10 sent out from the uncoiler 13 is cold-rolled as bent plate bodies 1a and 1b having a Z-section or an M-section. Since the cold rolling is not directly related to the gist of the present invention and is a well-known technique, the detailed description thereof will be omitted.

In the pre-processing mechanism 14, the bent plates 1a, 1
The metal strip 10 set as b is sent out from a winding sending-out mechanism 15 constituting a part of the apparatus main body 11 so as to be spirally wound around the rotating core 12. Note that 15
are guide rollers for determining the feeding direction of the metal strip 10.

On the other hand, the cored bar operating mechanism 16 has a threaded portion 16a formed on the outer peripheral surface thereof, and is provided so as to be driven by the operation of the motor 17. Therefore, when the cored bar operating mechanism 16 is rotated forward, the screw portion 1 of the cored bar operating mechanism 16 is rotated.
6a is screwed with a screw portion of a support frame (not shown) to rotate the cored bar 12 forward and forward. When the core metal operating mechanism 16 is reversed, the core metal 12 is reversed and retracted.

A winding guide mechanism 18 is provided at the base of the cored bar 12.
The metal strip 10 is spirally wound around the metal plate, and is composed of three guide rollers 18a arranged at intervals of 120 ° on a spiral line, and the metal plates are meshed with each other. Slide 10 grooves.

Each guide roller 18a has a control operation means 18b for controlling the set position, and a metal strip 10
And a display means 18c for displaying values such as a vertical position, a horizontal position, and an angle of the groove of the metal band plate 10 based on the position detection signal. And so on.

Next, the fastening mechanism 19 will be described. The fastening mechanism 19 presses the inside of the metal band plate 10 wound around the core bar 12 in the normal rotation state of the core bar 12 to fasten it, and fastens to the metal band plate 10 in the reverse rotation state. Any mechanism can be used as long as it has the function of canceling, and various mechanisms can be selected.

FIGS. 4 to 8 show a preferred example of the fastening mechanism 19.
This is an example. That is, this fastening mechanism 19
An abutment blade 20 as shown in FIG. 6 is buried at the tip of the core 12 so as to be able to protrude and retract, and is configured to protrude and retract from the outer peripheral surface of the core 12 by forward or reverse rotation of the core 12. (See FIGS. 4 and 5).

The retracting operation of the contact blade 20 may be performed by an electric command from an operating means (not shown), but is configured as shown in FIG. 6 and operated as shown in FIGS. 7 and 8. It is preferable if it is.

First, the tip of the core 12 is
A triangular groove 21 is formed so as to be along the axis of. In this case, the sides 21a and 21b of the triangular groove 21 are
The holes are drilled so as to satisfy the relationship of 21a> 21b. Then, the contact blade 20 is attached between the sides 21a and 21b of the groove 21 so as to be able to be inverted. The height h of the contact blade 20
Are h ≦ 21a and h> 21b.

To mount the contact blade 20 so that it can be inverted,
The open end surface of the triangular groove 21 is used as the tip end surface of the cored bar 12, and a hole 120 is formed in the depth surface of the triangular groove 21. In addition, a coupling 12a is provided to be fixed to the tip end surface of the cored bar 12, and a hole 120 facing the hole 120 on the depth surface of the triangular groove 21 is provided on the end surface of the coupling 12a.
a is opened, and the protruding shafts 20a, 20b of the contact blade 20 are rotatably inserted into the holes 120, 120a.

As a result, when the cored bar 12 rotates forward, FIG.
As shown in (2), the contact blade 20 is in a state of falling to the side 21b side. Therefore, the contact blade main body 20a of the contact blade 20 is h
> 21b, it comes into a protruding state with respect to the outer peripheral surface of the cored bar 12, and comes into contact with the inner side surface of the metal strip 10.

When the cored bar 12 is rotated in the reverse direction, as shown in FIG. 8, the contact blade 20 is in a state of falling to the side 21a. For this reason, the contact blade main body 20a of the contact blade 20 has h ≦ 2.
Due to the relationship with 1a, the outer peripheral surface of the cored bar 12 is in a non-projecting state, and is in a non-contact state with the inner side surface of the metal strip 10.

Next, a preferred process of the interlocked flexible tube formed after referring to FIGS. 11 and 12 will be described. That is, a pair of guide rollers 30 forming a V zone is provided on the front side of the interlock flexible tube X sent out in the normal rotation state.
A transfer table 30 composed of a and 30a, and a pulling means 31 for pulling the interlock type flexible tube X on the transfer table 30 in the feeding direction are provided.

As shown in FIG. 11, a pair of rollers 30a, 30a are opposed to each other at a slight distance from the transfer table 30, and a V zone formed on the upper side thereof receives the interlock type flexible tube X. And place it. Also,
The pair of rollers 30a, 30a receives the interlocked flexible tube X while rotating forward in synchronization with the forward rotation of the interlocked flexible tube X sent out by a driving means (not shown).

On the other hand, the pulling means 31 pulls the tip of the interlock flexible tube X while holding it at the same speed as the feeding speed of the interlock flexible tube X. Holding part 31a, free rotation mechanism 31
b, 31d and a traction portion 31c.

The holding portion 31a has the same shape as the interlock type flexible tube X and is screwed and fitted into the inner periphery of the distal end portion, and the rear portion side is integrally provided with a mounting frame 31b having a U-shaped cross section. I have. A hole (not shown) is formed in the vertical plate of the mounting frame 31b, and a connecting rod 31d such as a bolt inserted through the hole is loosely fitted to the holding portion 31a so as to be rotatable. .

The other end of the connecting rod 31d is fixed to the pulling portion 31c. The traction unit 31c is self-propelled by a driving unit (not shown) so as to pull the interlocked flexible tube X in the sending direction. During the self-propelled operation, the interlocking flexible tube rotates forward with the forward rotation of the interlocking flexible tube, and the interlocking flexible tube is pinched and pulled.

Next, the production of the interlock type flexible tube by the above-described apparatus will be described. First, the original interlock type flexible tube is manufactured by manual operation. As shown in FIG. 2 and FIG. 3, the metal strip 1
0 is wound, and the winding start end side of the metal strip 10 is fixed to the cored bar 12 with a fastening band 21 or the like.

Next, the metal strip 10 formed as a bent plate is spirally wound around the metal core 12 while rotating the metal core 12 in the normal direction, so that the leading end of the metal core 12 reaches the base of the metal core 12. The metal interlocking flexible tube which becomes a prototype by winding the metal strip 10 around is manufactured.

The tightening band 21 is connected to a pair of semi-circular metal holding members 21a and 21b by abutting and joining a hinged portion 21c on one side where they are joined to each other. The other side is a fastening band body or the like having a configuration in which a screwing portion 21d for maintaining the holding bodies 21a and 21b in a closed state is attached to the other side.

Next, when the original interlocking flexible tube is formed by abutting the peripheral surface of the cored bar 12, the tightening band 21 is removed and the cored bar operating mechanism 16 is removed.
To start normal rotation. The forward rotation and forward movement of the core 12 are started by the forward rotation of the core operating mechanism 16. When the forward rotation and forward movement of the cored bar 12 are started, the fastening mechanism 19 presses the inner side of the metal strip 10 around which the fastening mechanism 19 is wound at the leading end of the cored bar 12 and is fastened and wound. The metal strip 10 is fixed.

While the metal strip 10 wound around the cored bar 12 is kept in a fixed state by the fastening mechanism 19, the cored bar 12 is further rotated forward and moved forward to be sent out from the pre-processing mechanism 14. The coming metal strip 10 as a bent plate body is spirally wound around the peripheral surface of the cored bar 12 while its adjacent ends are engaged with each other, and is formed as an interlock type flexible tube.

When the cored bar 12 has reached its limit, the metal bar 12 is stopped from moving forward and then the metal strip 10 is stopped.
The fastening state of the fastening mechanism 19 is released, and the cored bar 12 is reversed. As a result, the cored bar 12 is easily reversed in the formed interlock type flexible tube, is retracted, and is returned to the initial position.

By repeating such an operation, the metal strip 10 is formed into an interlock type flexible tube while being spirally wound around the cored bar 12, so that the predetermined length of the interlock type flexible tube having a high accuracy in the diameter dimension is obtained. The flexible tube can be automatically formed continuously.

Further, the interlock type flexible tube sent out in the normal rotation state is pulled in the feeding direction in the normal rotation state by the pulling means 31 on the carrier table 30, so that a tension is always applied. The collapse of the diameter is prevented, and a long interlock type flexible tube can be continuously manufactured while maintaining high accuracy.

Further, since the metal strip side is not fixed to the work side as in the prior art and is fixed, and the core is configured to be rotatable forward and backward and to be able to move forward and backward, a long interlock is provided. Even when the mold flexible tube is formed, the apparatus is not enlarged and complicated.

Further, when the formed tube is removed from the metal core, it can be automatically performed by retreating the metal core, so that the productivity is improved and the interlock type flexible tube is efficiently formed. can do.

FIG. 9 shows a second embodiment of the fastening mechanism 19, in which the air supply passage 2 provided in the cored bar 12 is provided.
2 and a rubber body 23 which swells out of the metal core 12 by compressed air press-fitted from the air supply passage 22.

FIG. 10 shows a third embodiment of the fastening mechanism 19.
In this embodiment, the operating rod 2 is inserted into the metal core 12 so as to be able to advance and retreat, and the tip of the operating rod 2 is a cam surface 24a.
4 and a contact blade 25 that comes out of the cored bar 12 by sliding the cam surface 24a and the lower surface 25a of the operation rod 24.

[0044]

As described above, according to the present invention, an interlock having a high-precision diameter interlock can be continuously and efficiently obtained by forward / reverse rotation and forward / backward movement of a metal core without increasing the size and complexity of the apparatus. A mold flexible tube can be formed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of an apparatus according to the present invention.

FIG. 2 is an explanatory view showing an attached state of a cored bar and a tightening band.

FIG. 3 is an explanatory plan view showing one example of the tightening band of FIG. 2;

FIG. 4 is an explanatory diagram showing an operation example of a fastening mechanism when the core metal is rotated in the reverse direction.

FIG. 5 is an explanatory diagram showing an operation example of a fastening mechanism at the time of forward rotation of a cored bar.

FIG. 6 is a front view showing an example of a contact blade in the fastening mechanism.

FIG. 7 is a sectional view taken along line BB of FIG. 5;

8 is a sectional view taken along line AA of FIG. 4;

FIG. 9 is an explanatory sectional view showing a second embodiment of the fastening mechanism.

FIG. 10 is an explanatory sectional view showing a third embodiment of the fastening mechanism.

FIG. 11 is an explanatory view showing a traction means side of the interlock type flexible tube.

FIG. 12 is a side view showing a traction means side of the interlock type flexible tube.

FIG. 13 is a partially crushed cross-sectional view showing a Z-shaped interlock type flexible tube.

FIG. 14 is a partially crushed sectional view showing an M-shaped interlock flexible tube.

FIG. 15 is a plan view showing a schematic configuration of a conventional interlocking flexible tube manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Metal plate body 12 Core metal 13 Uncoiler 14 Pretreatment device 15 Winding sending mechanism 16 Core metal operating mechanism 18 Winding guide mechanism 19 Fastening mechanism 30 Carrier 31 Pulling means

Claims (6)

[Claims] 1. A method of manufacturing an interlock type flexible tube while spirally winding a metal strip processed into a bent plate body having a cross section Z or a cross section M while engaging both ends thereof with each other. In the forward rotation state, the front end side of the metal strip wound around the core bar is rotated forward and backward, and is movable forward and backward. A fastening mechanism is provided to release the fastening of the metal bar.When the core metal is rotated forward, the battleship section side of the metal strip wrapped around the core metal is fixed via the fastening mechanism and sent out from the pre-processing mechanism. While adhering the metal strip spirally around the core, the adjacent ends are engaged with each other to form an interlock type flexible tube.When the core reaches the advance limit, the advance of the core is stopped. Locking mechanism By releasing the fastening state to the metal strip by the above, and reversing the core metal in the formed interlock type flexible tube while reversing it and returning it to the initial position, repeating the above operation, long and high precision A method for manufacturing an interlock type flexible tube, comprising continuously forming an interlock type flexible tube having a large diameter. 2. The method for manufacturing an interlocking flexible tube according to claim 1, wherein the interlocking flexible tube sent out in the normal rotation state is pulled while receiving in the normal rotation state. 3. An apparatus for manufacturing an interlock-type flexible tube while spirally winding a metal strip processed into a bent plate body having a cross section Z or a cross section M while engaging both ends thereof. And an uncoiler that stocks metal strips as possible
Cross section Z of the metal strip delivered from the above uncoiler
A pre-processing mechanism that performs cold roll processing as a bent plate body with a shape and cross section M, a metal core that is attached to the main body of the device so that it can rotate forward and reverse, and a metal strip that is sent out from the pre-processing mechanism A winding and feeding mechanism for feeding the core metal in a spiral shape, and a winding guide mechanism disposed at the base of the metal core and guiding the metal strip to be wound spirally on the metal core. A fastening mechanism which is provided at the tip of the metal core side to fasten the tip of the metal strip in the forward rotation state of the metal core, and release the fastening to the metal strip in the reverse rotation state; An interlock type flexible tube manufacturing apparatus, comprising: a core operating mechanism driven by operation of a motor to perform forward / reverse rotation and forward / backward movement of a core. 4. A winding guide mechanism provided at a base portion of a metal core according to claim 1, wherein the band detects a position of a groove portion of a metal band plate spirally wound around the metal core. Plate detecting means, display means for displaying values such as vertical position, horizontal position, and angle on the metal band based on a detection signal from the band detecting means, and control operating means for controlling a set position of the winding sending mechanism; An interlock type flexible tube manufacturing apparatus, comprising: 5. A carrier table which rotates forward in synchronization with an interlock type flexible tube sent out in a normal rotation state and receives and mounts the interlock type flexible tube, and is rotatably formed. The traction means for clamping the distal end portion of the interlock type flexible tube and performing traction while rotating forward with the normal rotation of the interlock type flexible tube. An interlock type flexible tube manufacturing device. 6. The manufacturing of an interlocked flexible tube according to claim 5, wherein the traction means comprises a pair of rollers which rotate forward in synchronism with the interlocked flexible tube sent out in a forward rotation state. apparatus.