JP3686973B2 - Interlock type flexible tube manufacturing method and manufacturing apparatus thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manufacturing method of an interlock type flexible tube capable of efficiently forming a highly accurate diameter, and a manufacturing apparatus thereof.
[0002]
[Prior art]
Conventionally, as an elastic and flexible metal tube, an interlock-type flexible tube formed by spirally winding a metal strip made of stainless steel or the like while meshing both ends thereof is provided. Are known.
[0003]
Such an interlock-type flexible tube has a cross-sectional Z-shape (see FIG. 13) or a cross-sectional M-shape in a pretreatment step in which a flat metal strip 1 having a constant width is subjected to cold roll processing . (See FIG. 14) Bending plate 1a. Formed as 1b, both ends of such a metal strip 1 are wound spirally so as to engage with each other, and both ends engaged with each other are rolled to form an integral tube.
[0004]
In such a case, as shown in FIG. 15, as shown in FIG. 15, the metal core plate 4 is attached between the support means 2 and 3 constituting the apparatus main body so as to be freely rotatable, and is drawn out from the uncoiler 5. Is wound around the starting end side of the cored bar 4 and is clamped by a clamping band 21 (not shown) or the like to be fixed to the cored bar 4.
[0005]
Then, the uncoiler 5 is moved along the guide rail 6 to the terminal end side (in the direction of the arrow in the figure) while rotating the cored bar 4, so that the bent plate having a cross section Z shape or a cross section M shape drawn from the uncoiler 5. The metal strips 1 which are the bodies 1a and 1b are wound around the metal core 4 in a spiral manner, and the ends of the adjacent metal strips 1 are meshed with each other at the time of winding. A mold flexible tube is formed.
[0006]
Although not shown in the drawings, a short interlock type formed by meshing adjacent end portions with each other while spirally winding the metal strip 1 around a short rotatable metal core protruding from the apparatus main body. In some cases, a long interlock flexible tube is continuously formed while extruding the flexible tube sequentially from a short metal core.
[0007]
[Problems to be solved by the invention]
By the way, in the latter case described above, the interlock type flexible tube is continuously pushed out from the short core metal, so that the diameter dimension varies, and the interlock type with a high precision diameter dimension. There is a problem that a flexible tube cannot be obtained.
[0008]
Moreover, in the case of the former, since the metal strip plate side, which is a bent plate body, is the work side, the apparatus becomes large and complicated, and the formed interlock flexible tube is The work to remove from the core metal on the fixed side is very time-consuming work, and there is a problem such as inferior productivity.
[0009]
For this reason, the applicants have a configuration in which the core metal side on which the metal strip is wound is fixed, and the uncoiler side for feeding the metal strip is the workpiece side, rather than the conventional method in which the core metal side is the workpiece side. Based on this, we intensively researched a method for continuously and efficiently forming an interlock-type flexible tube with a high-precision diameter, and completed the device according to the present application.
[0010]
This invention is made | formed based on such a situation, and it aims at provision of the manufacturing method of the interlock type flexible tube which can form a diameter with high precision efficiently, and its manufacturing apparatus.
[0011]
[Means for Solving the Problems]
In order to defeat the above-mentioned object, the present invention is to wrap a metal strip processed into a bent plate body having a Z-shaped section or a M-shaped section while spirally winding both end sides of each other. In the method of manufacturing an interlock-type flexible tube, the tip end side of a metal strip that is wound in a forward rotation state is fixed to a core metal that is rotated forward and backward and is freely moved back and forth. In the reverse state, a fastening mechanism for releasing the fastening to the metal strip is provided, and during the normal rotation of the core bar, the tip side of the metal strip wrapped around the core bar is connected via the fastening mechanism. Adhering both ends to each other while forming a fixed state and winding a metal strip fed from the pre-processing mechanism in a spiral manner around the core bar to form an interlock-type flexible tube. Reached Stops the advancement of the core metal, releases the fixed state to the metal strip by the fixing mechanism, and reverses the core metal in the formed interlock type flexible tube to return to the initial position, By repeating the above operation, a long and highly accurate interlock type flexible tube is continuously formed while being sent out.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
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.
[0013]
As shown in the figure, a cored bar 12 that can rotate forward and backward and move forward and backward is disposed on one side of the apparatus main body 11, and a cored bar operating mechanism 16 connected to the cored bar 12 is disposed on the other side. ing.
[0014]
For the metal core 12, a metal strip 10 made of stainless steel or the like that has been cold-rolled as a bent plate 1a, 1b (see FIGS. 13 and 14) having a Z-shaped cross section or an M-shaped cross section is spirally formed. In the winding process, adjacent end portions are meshed with each other to form an interlock-type flexible tube. That is, the metal strip 10 is stocked in a wound state on the uncoiler 13, and the metal strip 10 is sent from the uncoiler 13 to the pretreatment mechanism 14.
[0015]
In the pre-processing mechanism 14, the metal strip 10 fed from the uncoiler 13 is cold-rolled as bent plate bodies 1a, 1b having a Z-shaped section or a M-shaped section . Note that the cold roll processing is not directly related to the gist of the present invention, and is a well-known technique, and therefore detailed description thereof is omitted.
[0016]
The metal strip 10 that is the bent plate bodies 1 a and 1 b in the pre-processing mechanism 14 is to be spirally wound around the rotating cored bar 12 from the winding and feeding mechanism 15 that constitutes a part of the apparatus main body 11. Sent out. In addition, 15a ... is a guide roller which determines the sending direction of the metal strip 10.
[0017]
On the other hand, the mandrel operating mechanism 16 is provided with a threaded portion 16 a formed on the outer peripheral surface thereof and driven by the operation of the motor 17. Therefore, when the mandrel operating mechanism 16 is rotated forward, the threaded portion 16a of the mandrel operating mechanism 16 is screwed with the threaded portion of the support frame (not shown), thereby causing the mandrel 12 to rotate forward and forward. Become. Further, when the core metal operating mechanism 16 is reversed, the core metal 12 is reversed and retracted.
[0018]
A winding guide mechanism 18 is provided at the base portion of the core metal 12, and the winding guide mechanism 18 is configured so that the metal strip 10 is spirally wound around the core metal 12. Are formed by three guide rollers 18a... Arranged at intervals of 120.degree. On a line, and slides on a groove portion of the metal plate 10 engaged with each other.
[0019]
Further, each guide roller 18a has a control operation means 18b for controlling its set position, a band plate detecting means (not shown) including an encoder for detecting the position of the groove portion of the metal band plate 10, and its position detection. Display means 18c for displaying the vertical position, horizontal position, and angle value of the groove portion of the metal strip 10 based on the signal is provided.
[0020]
Next, the fastening mechanism 19 will be described. The fixing mechanism 19 presses and fixes the inner side of the metal strip 10 wound around the core metal 12 in the normal rotation state of the core metal 12, and fixes the metal strip 10 to the metal strip 10 in the reverse rotation state. Any mechanism can be used as long as it has an effect of canceling the mechanism, and various mechanisms can be selected.
[0021]
4 to 8 show a preferred example of the fastening mechanism 19. That is, in the fixing mechanism 19, the contact blade 20 as shown in FIG. 6 is embedded in the tip end portion of the core metal 12 so as to be able to protrude and retract. It is comprised so that it may protrude from the outer peripheral surface (refer FIG. 4, FIG. 5).
[0022]
The advancing and retracting operation of the abutting blade 20 may be performed by an electrical command from an operating means (not shown). However, it is preferable that the abutting blade 20 is configured as shown in FIG. 6 and operated as shown in FIGS. It is.
[0023]
First, a triangular groove 21 is formed in the tip portion of the core metal 12 along the axis of the core metal 12. In this case, the sides 21a and 21b of the triangular groove portion 21 are drilled so as to have a relationship of 21a> 21b. Then, the contact blade 20 is attached so as to be inverted between the sides 21 a and 21 b of the groove portion 21. The height h of the contact blade 20 is set to h ≦ 21a and h> 21b.
[0024]
In order to attach the abutment blade 20 in an invertible manner, the open end surface of the triangular groove portion 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 portion 21. In addition, a coupling 12a fixed to the tip surface of the cored bar 12 is provided, and a hole 120a facing the hole 120 on the depth surface of the triangular groove portion 21 is formed on the end surface of the coupling 12a. The projecting shafts 20a and 20b of the abutment blade 20 are rotatably inserted into the inside.
[0025]
Thereby, at the time of the normal rotation of the metal core 12, as shown in FIG. 7, the contact blade 20 falls to the side 21b side. For this reason, the contact blade main body 20a of the contact blade 20 is in a protruding state with respect to the outer peripheral surface of the cored bar 12 due to the relationship of h> 21b, and is in contact with the inner surface of the metal strip 10.
[0026]
Further, when the cored bar 12 is reversed, as shown in FIG. 8, the contact blade 20 is in a state of falling to the side 21 a side. For this reason, the contact blade main body 20a of the contact blade 20 is in a non-projecting state with respect to the outer peripheral surface of the cored bar 12 due to the relationship of h ≦ 21a, and is not in contact with the inner surface of the metal strip 10.
[0027]
Next, the suitable process of the interlock type flexible tube after forming based on FIG. 11, FIG. 12 is demonstrated. That is, on the front side of the interlock-type flexible tube X fed out in the normal rotation state, a transport table 30 including a pair of guide rollers 30a and 30a forming a V zone and an interlock-type flexible tube on the transport table 30 are provided. A pulling means 31 for pulling the tube X in the feed-out direction is installed.
[0028]
As shown in FIG. 11, a pair of rollers 30a and 30a are opposed to each other at a slight interval, and the V zone formed on the upper side thereof receives the interlock type flexible tube X as shown in FIG. Put. Further, the pair of rollers 30a, 30a receives the interlock type flexible tube X while rotating forward in synchronization with the forward rotation of the interlock type flexible tube X fed out by driving means (not shown).
[0029]
On the other hand, the pulling means 31 pulls the tip of the interlock flexible tube X while holding the tip of the interlock flexible tube X at the same speed as the delivery speed of the interlock flexible tube X, and holds the tip of the interlock flexible tube X. 31a, free rotating mechanisms 31b and 31d, and a traction part 31c.
[0030]
The sandwiching portion 31a has the same shape as the interlock type flexible tube X and is screwed into the inner periphery of the distal end portion, and a mounting frame 31b having a U-shaped cross section is integrally provided on the rear portion side. A hole (not shown) is formed in the vertical plate of the attachment frame 31b, and a connecting rod 31d such as a bolt that passes through the hole is attached in a loosely fitted state so that the holding portion 31a can be freely rotated. .
[0031]
Further, the other end side of the connecting rod 31d is fixed to the pulling portion 31c. The towing unit 31c is self-propelled so as to tow the interlock flexible tube X in the delivery direction by a driving means (not shown). At the time of this self-propelled movement, while the forward rotation of the interlock-type flexible tube is performed forward, the interlock-type flexible tube is sandwiched and pulled.
[0032]
Next, manufacture of the interlock type flexible tube by the above-described apparatus will be described. First, an interlock type flexible tube that is the original shape is manufactured by manual operation. As shown in FIGS. 2 and 3, the metal strip 10 is wound around the tip of the core 12, and the winding start end side of the metal strip 10 is fixed to the core 12 by a fastening band 21 or the like. .
[0033]
Next, the metal strip 10 formed into a bent plate while the core metal 12 is rotated forward is spirally wound around the core metal 12, and the metal strip so as to reach the base of the core metal 12 from the tip end of the core metal 12. The interlock type flexible tube which becomes an original form by winding the strip 10 is manufactured.
[0034]
The fastening band 21 can be freely opened and closed via a pivoting portion 21c formed of a hinge connection on one side where a pair of metal sandwiching bodies 21a and 21b formed in a semicircular shape are abutted and joined to each other. The other side is a tightening band body or the like having a configuration in which a screwing portion 21d for maintaining the sandwiching bodies 21a and 21b in a closed state is attached.
[0035]
Next, when the interlock-type flexible tube that is the original shape is pressed against the peripheral surface of the cored bar 12, the fastening band 21 is removed, and normal rotation of the cored bar operating mechanism 16 is started. The normal rotation and advance of the core metal 12 are started by the normal rotation of the core metal operating mechanism 16. When normal rotation and forward movement of the core metal 12 are started, the inner end of the metal strip 10 around which the fixing mechanism 19 is wound is pressed and fixed at the tip of the core metal 12. The metal strip 10 is fixed.
[0036]
Then, the metal strip 10 wound around the metal core 12 is bent and fed out from the pretreatment mechanism 14 by further rotating the metal core 12 forward while the fastening mechanism 19 is in a fixed state. The metal strip 10 as a plate is sequentially wound around the peripheral surface of the core metal 12 with its adjacent ends meshing with each other, and formed as an interlock-type flexible tube.
[0037]
Further, when the core metal 12 reaches its advance limit, after the advance of the core metal 12 is stopped, the fixed state of the fixing mechanism 19 to the metal strip 10 is released, and the core metal 12 is reversed. . Thereby, the cored bar 12 is retracted while being easily reversed in the formed interlock-type flexible tube and returned to the initial position.
[0038]
By repeating such an operation, the metal strip 10 is formed into an interlock-type flexible tube while being spirally wound around the metal core 12, so that an interlock-type flexible tube having a predetermined length with a high accuracy in diameter is provided. It can be automatically formed continuously.
[0039]
In addition, the interlock-type flexible tube sent out in the normal rotation state is pulled in the feeding direction while being in the normal rotation state by the pulling means 31 on the transport table 30, so that the tension is always applied and the diameter of the flexible tube is increased. Collapse is prevented, and a long interlock flexible tube can be continuously manufactured while maintaining high accuracy.
[0040]
In addition, since the metal strip side is not fixed to the work side as in the prior art, and the cored bar is configured to be able to rotate forward and backward and move forward and backward, it is a long interlock flexible tube. Even in the case of forming, the apparatus is not increased in size and complexity.
[0041]
Furthermore, when the formed tube is removed from the core bar, it can be automatically performed by retreating the core bar, so that productivity can be improved and an interlock-type flexible tube can be efficiently formed. it can.
[0042]
FIG. 9 shows a second embodiment of the fastening mechanism 19, and the metal core is formed by an air supply path 22 provided in the metal core 12 and compressed air that is press-fitted from the air supply path 22. 12 and a rubber body 23 that bulges from 12.
[0043]
FIG. 10 shows a third embodiment of the fastening mechanism 19, which is inserted into the metal core 12 so as to be able to advance and retreat, and has an operation bar 24 having a cam surface 24a at its tip, and an operation bar. The cam surface 24a of 24 and the lower surface 25a are comprised by the contact blade 25 which protrudes and protrudes from the metal core 12 by sliding.
[0044]
【The invention's effect】
As described above, according to the present invention, an interlock-type flexible tube having a diameter that is continuously and efficiently high-precision can be formed by forward / reverse rotation and forward / backward movement of the core bar without increasing the size and complexity of the apparatus. It can be performed.
[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 attachment state of a cored bar and a fastening band.
3 is an explanatory plan view showing an example of the fastening band of FIG. 2. FIG.
FIG. 4 is an explanatory view showing an operation example of a fastening mechanism at the time of reverse rotation of the cored bar.
FIG. 5 is an explanatory view showing an operation example of a fastening mechanism during normal rotation of the cored bar.
FIG. 6 is a front view showing an example of a contact blade in the fastening mechanism.
7 is a cross-sectional view for explaining the BB line in FIG. 5;
8 is a cross-sectional view for explaining the AA line in FIG. 4. FIG.
FIG. 9 is an explanatory cross-sectional view showing a second embodiment of a fastening mechanism.
FIG. 10 is an explanatory cross-sectional view showing a third embodiment of a fastening mechanism.
FIG. 11 is an explanatory view showing the traction means side of the interlock type flexible tube.
FIG. 12 is a side view showing the pulling means side of the interlock-type flexible tube.
FIG. 13 is a partially broken sectional view showing a Z-shaped interlock flexible tube.
FIG. 14 is a partially broken sectional view showing an M-shaped interlock flexible tube.
FIG. 15 is a plan view showing a schematic configuration of a conventional interlock-type flexible tube manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Metal plate body 12 Core metal 13 Uncoiler 14 Pre-processing apparatus 15 Winding delivery mechanism 16 Core metal operating mechanism 18 Winding guide mechanism 19 Fastening mechanism 30 Conveyance stand 31 Pull means

Claims (6)

In a method of manufacturing an interlock-type flexible tube while winding a metal strip processed into a bent plate body having a Z-shaped cross section or a M-shaped cross section in a spiral shape while meshing both end sides thereof, it is rotated forward and backward. At the same time, the metal core plate that is wound around the metal core that is deployed in the main body of the device in a forward rotation state is fixed to the tip of the metal band plate, and the reverse rotation state is released from the metal band plate. A metal strip that is provided with a fastening mechanism, with the tip end side of the metal strip wound around the core bar fixed during the normal rotation of the core bar, and is fed out from the pretreatment mechanism. While the plate is spirally wound around the metal core, the adjacent ends are meshed with each other to form an interlock-type flexible tube. When the metal core reaches the advance limit, the advancement of the metal core is stopped and the metal by the fastening mechanism Strip The interlock mechanism with a long and high-precision diameter is released by releasing the fastening mechanism and returning the cored bar to the initial position by reversing it in the formed interlock flexible tube and repeating the above operation. A method for manufacturing an interlock-type flexible tube, wherein the mold-type flexible tube is continuously formed while being fed out.   2. The method for producing an interlock-type flexible tube according to claim 1, wherein the interlock-type flexible tube sent out in a normal rotation state is pulled while being received in a normal rotation state. In an apparatus for manufacturing an interlock-type flexible tube while winding a metal strip processed into a bent plate body having a Z-shaped cross section or a M-shaped cross section in a spiral shape while meshing both ends thereof, the metal strip is An uncoiler stocked as feedable, a pre-processing mechanism for cold-rolling a metal strip fed from the uncoiler as a bent plate body having a Z-shaped or M-shaped cross section , and forward / reverse rotation and forward / backward movement in the apparatus body A core bar that can be freely attached, a winding and feeding mechanism that feeds the metal strip fed from the pre-processing mechanism in a spiral manner around the core, and a metal strip that is disposed at the base of the core A winding guide mechanism that guides the cored bar so that it is wound spirally, and in the normal rotation state of the cored bar provided at the leading end of the cored bar, the leading end side of the metal strip is fastened. It comprises a fastening mechanism that releases the fastening to the metal strip in the reverse state, and a cored bar actuating mechanism that is driven by the operation of the motor to perform forward / reverse rotation and forward / backward movement of the cored bar. Interlock type flexible tube manufacturing equipment. A winding guide mechanism provided at the base part of the cored bar according to claim 3, wherein the strip plate detecting means detects the position of the groove part of the metal strip that is spirally wound around the cored bar, vertical position in the metal strip based on the detection signal from the plate detector, horizontal position, and a display means for displaying the value of the angle, claim and a control operation unit, the controlling the setting position of the winding forwarded out mechanism 3 The manufacturing apparatus of the interlock type flexible tube of description .   A conveyor base that rotates in synchronization with the interlock-type flexible tube sent out in the normal rotation state and receives the interlock-type flexible tube and receives the interlock-type flexible tube. The interlock type flexible tube according to claim 3, further comprising: a traction unit that clamps a distal end portion of the flexible tube and performs traction while rotating forward along with the normal rotation of the interlock type flexible tube. Manufacturing equipment.   6. The apparatus for producing an ink-locked flexible tube according to claim 5, wherein the pulling means comprises a pair of rollers that rotate in synchronization with the interlock-type flexible tube sent out in the normal rotation state.

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