WO1998015367A1

WO1998015367A1 - Method of manufacturing interlocking flexible tube and apparatus therefor

Info

Publication number: WO1998015367A1
Application number: PCT/JP1996/002918
Authority: WO
Inventors: Norifusa Suzuki
Original assignee: Norifusa Suzuki
Priority date: 1996-10-07
Filing date: 1996-10-07
Publication date: 1998-04-16

Abstract

An interlocking flexible tube of a predetermined length is formed by using a core metal as a work which is constructed to be forwardly rotatable and retractable, when an interlocking flexible tube having elasticity and flexibility is manufactured, providing an anchoring mechanism for anchoring a metallic band plate, which is wound around the core metal to a tip end of the core metal from inside the tip end when the core metal forwardly rotates and releasing anchoring of the core metal to the metallic band plate when the core metal reversely rotates, advancing the core metal while forwardly rotating it whereby both ends of the metallic band plates in the form of a bent plate body fed from a pretreatment mechanism are engaged with each other and spirally wound around the core metal to form an interlocking flexible tube, reversely rotating the core metal after stopping advancement of the core metal in the case where the core metal reaches its limit of advancement to release the anchoring of the core metal to the metallic band plate by the anchoring mechanism, retreating the core metal in the formed interlocking flexible tube while reversely rotating it to return the core metal to an initial position, and repeating the above steps.

Description

SPECIFICATION METHOD FOR PRODUCING INTERLOCK FLEXIBLE TUBE AND APPARATUS FOR PRODUCING THE SAME

Technical field

The present invention relates to a method for manufacturing an open-ended flexible tube capable of efficiently forming a diameter with high accuracy, and an apparatus for manufacturing the same. Background art

Conventionally, an interlock type formed of a metal tube made of stainless steel or the like that is spirally wound with its both ends joined together as a metal tube that has both elasticity and fragility. Flexible tubes are known. In such an interlock-type flexible tube, a long, flat metal plate 1 having a constant width is preliminarily formed in a z-section (see FIG. 11) in a pretreatment step in which a cold opening is processed. ) Alternatively, it is formed into a bent plate 1a.1b having an M-shaped cross section (see Fig. 12), and is formed into a spiral shape so that both end portions of such a metal strip are mutually engaged. Both ends are wound together and pi-rolled to form an integral tube.

In such a case, as shown in FIG. 13, a metal core 4 is rotatably mounted between the support means 2 and 3 constituting the main body of the apparatus, and the metal core pulled out from the uncoiler 5.带 Wrap the plate 1 around the start end of the core 4 and fasten it to the core 4 by tightening it with a fastening band 21 (see Fig. 3).

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 Z-shaped or M-shaped bend drawn out from the uncoiler 5 is bent. The metal strip 1, which is a plate 1 a .1 b, is spirally wound around the cored bar 4. At the time of winding, the ends of the adjacent metal strips 1 are joined together, Pre-defined length of bite-type flexi Forming a bull tube.

Although not shown in the drawings, a short rotatable metal core protruding from the main body of the device is formed around a short rotatable metal core while spirally wrapping metal 1 and joining the adjacent ends together. In some cases, a long interlock flexible tube is continuously formed while sequentially extruding a single lock type flexible tube from a short core.

By the way, in the latter case, the diameter of the flexible tubing is increased due to the method of continuously extruding the interlinkable flexible tube from the short core bar. There is a problem that it is not possible to obtain an internet-type flexible tube.

In the former case, since the metal plate, which is a bent plate, is used as the work side, the device becomes larger and more complicated, and the formed interlock-flexible flexible member is used. Removing the tube from the core, which is the fixed side, is a very time-consuming task, and has problems such as poor productivity.

For this reason, the applicants have adopted a configuration in which the core metal side around which the metal strip is wound is fixed and the uncoiler side for feeding out the metal strip is the work side, but the core metal side is the work side. Based on this, the inventor of the present invention has conducted intensive research on a method for continuously and efficiently forming an interconnected flexible tube having a high-precision diameter, and has completed the apparatus according to the present invention.

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 that can form a diameter efficiently and with high accuracy, and an apparatus for manufacturing the same. Disclosure of the invention

The present invention relates to an intermetallic strip, which is formed by bending a metal strip which is cold-processed as a bent plate body having a Z-shaped cross section or a M-shaped cross section while spirally winding the two ends together. When manufacturing a gusset type flexible tube, In the forward rotation state, the metal plate wound around the metal core bar, which can be freely moved forward and backward, is fastened from the inside of the tip, and in the reverse rotation state, the fastening to the metal strip is released. When the core metal is moved forward in the normal rotation state, the wound metal plate is fixed through the fastening mechanism and sent out from the pretreatment mechanism. When the both ends of the metal plate of the bent plate body are spirally wound around the core metal while being connected to each other, an open-ended flexible tube is sequentially formed, and when the core metal reaches its advance limit, After stopping the advance of the core bar, the core bar is set in the reverse rotation state, the state of being fixed to the metal plate by the fixing mechanism is released, and the core bar is rotated in the inter-portable flexible tube formed. Move it back to the initial position and repeat the above operation. Continuously forming the I pointer one lock type flexible tube of precise diameter in elongated by returning Ri. BRIEF DESCRIPTION OF THE FIGURES

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 a mounting state of a cored bar and a tightening band, and FIG. FIG. 4 is an explanatory plan view showing one example of a band, FIG. 4 is an explanatory view showing an example of the operation of the fastening mechanism when the core metal is rotated in the reverse direction, and FIG. FIG. 6 is a front view showing an example of a contact blade in a fastening mechanism, FIG. 7 is a sectional view taken along line BB of FIG. 5, and FIG. FIG. 4 is a cross-sectional view for explaining the A-A line in FIG. 4, FIG. 9 is a cross-sectional view for explaining a second embodiment of the fastening mechanism, and FIG. 10 is a third embodiment of the fastening mechanism. FIG. 11 is a partially broken cross-sectional view showing an Z-shaped interlock flexible tube, and FIG. 12 is an M-shaped interlock flexible tube. Partially exploded cross-sectional view showing a blanking, first FIG. 3 is a plan view showing a schematic configuration of a conventional inter one lock-type flexible tube manufacturing apparatus.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 shows the invention FIG. 2 is a plan view showing a schematic configuration of the device according to the first embodiment. As shown in the drawing, a core metal 12 is provided on one side of the device main body 11 so as to be rotatable forward and backward and movable forward and backward, and on the other side. A core operating mechanism 16 connected to the core 12 is provided.

The metal core 12 is made of a metal such as stainless steel that has been cold-rolled as a bent plate 1 a, lb (see FIGS. 11 and 12) having a Z-shaped or M-shaped cross section. The production plate 10 is spirally wound, and at the time of the winding, adjacent ends are joined together to form an interlock-type flexible tube.

That is, the metal plate 10 is wound around the uncoiler 13 in a wound state, and the metal plate 10 is sent out from the uncoiler 13 to the pretreatment mechanism 14.

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

The metal strip 10 formed as the bent plates 1 a and 1 b in the pre-processing mechanism 14 is disposed on the rotating metal core 12 from the winding delivery mechanism 15 forming a part of the apparatus body 11. It is sent out to be wound spirally. Reference numerals 15 3 ····· denote guide rollers that determine the direction in which the metal plate 10 is sent out.

On the other hand, the cored bar operating mechanism 16 has a threaded portion 16a formed on the outer surface thereof and is arranged 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 16 of the cored bar operating mechanism 16 a force is screwed with the screw of the support frame (not shown) to rotate the cored bar 12 forward. It is here that you make it move forward. Further, when the mandrel operating mechanism 16 is reversed, the mandrel 12 is reversed and retracted.

A winding guide mechanism 18 is provided at the base of the core 12, and the winding guide mechanism 18 is formed by winding a metal plate 10 around the core 12 spirally. Let's go Therefore, it is composed of three guide rollers 18a ·-arranged at intervals of 120 ° on a spiral line, and slides in the groove of the metal plate 10 which is engaged with each other.

Further, each guide roller 18a has a control operation means 18 for controlling its set position, and a plate detecting means (not shown) comprising an encoder for detecting the position of the groove of the metal plate 10 (not shown). And display means 18c for displaying values such as the vertical position, horizontal position, and angle of the groove of the metal plate 10 based on the position detection signal.

Next, the fastening mechanism 19 will be described. The fastening mechanism 19 presses the inside of the metal strip 10 wound around the metal core 12 in the normal rotation state of the metal core 12 to fasten the metal strip 10, and in the reverse rotation state, the metal metal plate 1 Any mechanism can be used as long as it has the function of releasing the fastening to zero, and various mechanisms can be selected.

4 to 8 show a preferred example of the fastening mechanism 19. FIG. That is, in the fastening mechanism 19, the contact blade 20 as shown in FIG. 6 is buried at the tip of the core bar 12 so as to be freely protruded and retracted, and the forward or reverse rotation of the core bar 12 is performed. It is configured so that it protrudes and retracts from the outer peripheral surface of the core metal 12 (see FIGS. 4 and 5).

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

First, a triangular groove 21 is formed at the tip of the core bar 12 so as to be along the line of the core bar 12. In this case, the sides 21a and 21b of the triangular groove 21 are perforated so as to satisfy a relationship of 21a> 21b. Then, the contact blade 20 is attached between the sides 21 a and 21 b of the groove 21 so that the contact blade 20 can be turned upside down. The height h of the contact blade 20 is set to h≤21a, h> 21b.

To attach the contact blade 20 so that it can be turned upside down, the open end face of the triangular groove 21 is used as the tip face of the core bar 12, and a hole 120 is formed in the depth of the triangular groove 21. . In addition, a coupling 12a is fixed to the tip end surface of the cored bar 12, and a hole facing the hole 120 of the depth surface of the triangular groove 21 is formed on the end surface of the coupling 12a. 0a is opened, and the protruding shafts 20a, 20b of the contact blade 20 are rotated in both holes 120, 120a. Fit as much as possible.

As a result, when the cored bar 12 rotates forward, as shown in FIG. 7, the contact blade 20 is in a state of falling to the side 21 b. For this reason, the contact blade 20 a of the contact blade 20 protrudes from the outer peripheral surface of the cored bar 12 due to the relationship with h> 21 b, and is in contact with the inner surface of the metal strip 10. It will be in contact.

Further, 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 does not protrude from the outer peripheral surface of the cored bar 12 due to the relationship of h≤2la, and is not in contact with the inner surface of the metal plate 10. It will be in contact.

Next, the manufacture of the interlock type flexible tube by the above-described apparatus will be described.

First of all, an original one-piece flexible tube is manufactured by manual operation. As shown in FIGS. 2 and 3, a metal plate 10 is wrapped around the end of the metal core 12, and a winding band 21 is used to start winding the metal plate 10. Is fixed to the core metal 12.

Next, a metal strip 10 formed into a bent plate body is spirally wound around the core bar 12 while rotating the core bar 12 forward, and the tip of the core bar 12 is wound around the base of the core bar 12. The company manufactures an intact flexible tube that is wound around a metal substrate 10 as it should be.

The fastening band 21 is a pair of metal holding members 21a and 21b formed in a semicircular shape, and is pivotally connected by a hinge connection on one side which is abutted and joined to each other. A fastening band that is openably and closably coupled via a portion 21c and has a screwing portion 21d attached to the other side for maintaining the holding members 21a and 21b in a closed state. It is a body.

Next, when the flexible one-piece flexible tube as the original shape is formed by abutting on the peripheral surface of the metal core 12, the fastening band 21 is removed, and the core metal operating mechanism 16 starts normal rotation. The forward rotation and forward movement of the core metal 12 are started by the forward rotation of the core metal operation mechanism 16. You. When forward rotation and forward movement of the cored bar 12 are started, the inside of the metal plate 10 around which the fastening mechanism 19 is wound is pressed at the end of the cored bar 12 to be fixed. Then, the wound metal strip 10 is fixed.

Then, while the metal plate 10 wound around the cored bar 12 is fixed to the fastening mechanism 19, the cored bar 12 is further rotated forward and moved forward to advance the pretreatment mechanism. The metal strip 10 as a bent plate sent out from 14 is spirally wound around the peripheral surface of the cored bar 12 while successively adjoining its ends to each other. It is formed as a lock-type flexible tube.

When the core metal 12 has reached its forward limit, the metal bar 12 is stopped from moving forward, then the fastening mechanism 19 to the metal strip 10 is released, and the core metal 12 is released. Reverse 1 2. As a result, the core metal 12 is easily reversed in the formed one-piece flexible tube, is retracted, and is returned to the initial position.

By repeating such operations, the metal plate 10 is formed into an inter-portable flexible tube while being spirally wound around the cored bar 12. It is possible to continuously and automatically form an interlock type flexible tube.

In addition, the metal strip side is not fixed to the work side as in the prior art, but is fixed, and the core is rotatable in forward and reverse directions. Even if a flexible tube is formed, the size of the equipment is not increased * it is not complicated.

Furthermore, when the formed tube is removed from the mandrel, it can be automatically performed by retracting the mandrel, thereby improving productivity and efficiently forming an interlock-type flexible tube. can do.

FIG. 9 shows a second embodiment of the fastening mechanism 19, in which an air supply path 22 provided in a metal core 12 and a press-fit from the air supply path 22 are shown. It consists of a rubber rest 23 that swells out of the metal core 12 by compressed air.

FIG. 10 shows a third embodiment of the fastening mechanism 19, in which a metal core 12 * 1

Five

The operating rod 24 is inserted movably into and out of the inside 8 and the tip is a cam surface 24a. The cam surface 24a of the operating rod 24 and the lower surface 25a are slid into contact with each other. It is composed of a contact blade 25 that appears and disappears from gold 12.

5 Industrial applicability

As described above, according to the present invention, it is possible to continuously and efficiently increase the accuracy of the diameter of the inter-link type flexible by forward / reverse image transfer and advance / retreat operations of the metal core without increasing the size and complexity of the apparatus. Tube formation can be performed. 0

20

twenty five

Claims

The scope of the claims

I A metal strip strip that has been cold rolled as a bent plate body with a Z-shaped cross section or M-shaped cross section is spirally wound with both ends joined together, and an open-ended flexible tube is formed. In the method of manufacturing,

In the forward rotation state, a metal 配備 plate wound around the metal core is fixed to the core metal that is rotated forward and backward and can move forward and backward. When a fastening mechanism is provided to release the fastening to the core, and when the core is moved forward in the normal rotation state, the wound metal plate is fixed through the fastening mechanism, and the The metal plate as the bent plate rest that is sent out is spirally wound around the core while joining both ends of the metal plate to form an interconnected flexible tube, and the core reaches its advance limit. In this case, after stopping the advancement of the core bar, the core bar is turned to the reverse state, the fastening state to the metal strip by the fastening mechanism is released, and the core bar is formed inside the interlock type flexible tube. Reverse and retreat to the initial position A method for manufacturing an interlocking flexible tube, comprising: forming a long, highly accurate interlocking flexible tube by repeating the above operation.

2. A metal plate that has been cold-processed as a bent plate with a Z-shaped cross section or M-shaped cross section. In an apparatus for manufacturing tubes,

An uncoiler that stocks a metal plate so that it can be sent out, a pre-processing mechanism that cold rolls the metal plate sent out from the uncoiler as a bent plate having a cross section or a cross section, and an apparatus. A core metal that can be freely rotated and moved forward and backward on the main body, and a winding and sending mechanism that guides a metal plate, which is a bent plate sent out from the pre-processing mechanism, to spirally wind around the core. A winding guide that is provided at the base of the core bar and guides the metal strip so that it is spirally wound around the core bar. And a fastening mechanism provided at the end of the metal core side to lock the inside of the metal strip when the metal core is in the normal rotation state and release the metal metal plate when the metal core is in the reverse rotation state. And a core operating mechanism driven by the operation of the motor to perform forward / reverse rotation and forward / backward movements of the core.

3. A winding guide mechanism provided at the base of the metal core described in claim 1, and detects a position of a groove of a metal strip 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 strip based on a detection signal from the plate detecting means; control operating means for controlling a setting position of a guide roller; An interlock-type flexible tube manufacturing apparatus, comprising: