JP2001061766A - Helical groove processing device for channel tube for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a helical groove processing device for an endoscope channel tube capable of stably processing helical grooves to a channel tube blank at a prescribed groove depth when forming the helical grooves at the channel tube blank. SOLUTION: The helical groove processing device for the channel tube for the endoscope has a rotary drive assembly 24 having a collect chuck 23 for holding the channel tube blank 22 inserted with an arbor 21, wire supply devices 2 and 3 for delivering a grooved wire 26 and a centering jig 25 for supporting the arbor 21 and forms the helical groove on the outer peripheral surface of the channel tube blank 22 by rotating the channel tube blank 22 while heating its surface and winding the grooved wire 26 thereon. The wire supply devices 2 and 3 of the device described above are provided with a supply reel 32 wound with the grooved wire 26, a rotating device 33 for rotatably driving the supply reel 32, a pulley 40 hung to the grooved wire 26 between the supply reel 32 and the channel tube blank 22 and pressing means 39, 40 and 41 for supporting the pulley 40 and imparting specified tension to the grooved wire 26 via the pulley 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a spiral groove in an endoscope channel tube, which forms a spiral groove on the outer periphery of a channel tube incorporated in an endoscope.

[0002]

2. Description of the Related Art Generally, a channel tube for an endoscope has uniform waist strength and flexibility that does not break or buckle even when subjected to a deformation force accompanying the bending of an endoscope insertion portion. Is required. Therefore, conventionally, as shown in FIG.
And an endoscope guide tube (endoscope channel tube) in which a hard wire winding material 107 is wound along the spiral groove 106 is a technique disclosed in Japanese Utility Model Publication No. 59-40002 (prior art). 1).

As means for forming the spiral groove of the endoscope channel tube, Japanese Patent Application Laid-Open No. 5-228106 is used.
The technology (prior art 2) disclosed in Japanese Patent Laid-Open Publication No. H10-216,837 is disclosed. FIG. 5 shows a spiral groove processing device for the endoscope channel tube, a rotary drive device 204 having a collet chuck 203 for holding a channel tube material 202 having a cored bar 201 inserted, and a wire rod for feeding a grooved wire 205. The supply device 206 includes a core receiving jig 207 for preventing the long channel tube material 202 inserted through the core 201 from swaying during rotation, and a centering jig 208 for supporting the core 201. The wire supply device 206 is provided with a grooved wire guide 209 for guiding the grooved wire 205 to be fed. The collet chuck 203 is provided with a set screw 210 for fixing the tip of the grooved wire 205 fed from the wire feeder 206. 211 is a heat gun for heating.

[0004] Next, a spiral groove machining method using the spiral groove machining apparatus for the endoscope channel tube will be described.
The operation will be described in the order of operation.

(1) A tube made of Teflon (fluororesin) is cut to a specified size to obtain a channel tube material 202.

(2) This channel tube material 202
Is inserted into the inner cavity of the core.

(3) The channel tube material 202
Is held by the collet chuck 203. At this time, a tape is wrapped around the portion of the channel tube material 202 to be sandwiched, or a soft material or the like is fixed on the collet chuck 203 side so that the channel tube material 202 is not damaged. To

(4) The centering jig 208 is applied to the tip of the core bar 201 to perform centering.

(5) The grooved wire 205 is paid out from the wire feeder 206, the tip of the grooved wire 205 is passed through a wire guide 209, and the tip of the grooved wire 205 is wound around the set screw 210 of the collet chuck 203. Fix it. The tension applied to the grooved wire 205 is adjusted by operating an adjustment screw (not shown) of the non-slip means for applying tension to the grooved wire 205.

(6) By driving the rotation driving device 204 to rotate the channel tube material 202, the grooved wire 20 is formed around the outer periphery of the channel tube material 202.
5 is wound. At this time, the fixed head portion of the wire guide 209 is moved at a speed proportional to the rotation amount of the channel tube material 202 by the rotation driving device 204 at a speed proportional to the channel tube material 202 at the wire guide 2.
09 to the channel tube material 202
5 along the longitudinal axis direction of FIG. Therefore, the grooved wire 205 is wound at a predetermined pitch. The wire guide 209 is provided with a non-slip means for applying tension to the grooved wire 205 to be pulled out. Therefore, the grooved wire 205 is wound around the outer periphery of the channel tube material 202 by tension.

(7) In the winding operation (6), the heat gun 211 is attached to the channel tube material 202.
The grooved wire 205 is wound around the softened peripheral surface portion while applying heat. Therefore, the peripheral surface portion of the channel tube material 205 around which the grooved wire 205 is wound undergoes heating deformation, and is pressed by the grooved wire 205 to form the spiral groove 2.
12 are formed.

(8) After the grooved wire 205 is wound around a predetermined area of the channel tube material 202, the grooved wire 205 is cut at the feeding port of the wire guide 209, and the set screw 210 of the collet chuck 203 is loosened to release the groove. The attached wire 5 is separated.

(9) The grooving wire 205 wound around the channel tube material 202 is rotated in the same direction as the wrapping wire 205 wound while applying tension to the end on the side of the set screw 210, thereby forming the wrapped groove. The wire 205 is removed from the channel tube material 202.

[0014]

However, the above-mentioned prior art spiral groove machining apparatus for an endoscope channel tube has no means for detecting a change in tension and making a fine adjustment. Has not been maintained at a constant level, and a product of stable quality cannot be obtained.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the invention according to claim 1 or 2 is to form a spiral groove in a channel tube material at a predetermined groove depth. An object of the present invention is to provide a spiral groove processing apparatus for an endoscope channel tube that can be stably processed.

[0016]

According to a first aspect of the present invention, there is provided a rotary driving device having a collet chuck for holding a channel tube material having a core inserted therein, and a grooved wire. A feeding device for feeding the wire, and a centering jig for supporting the metal core, while rotating the surface of the channel tube material while heating, winding the grooved wire material, and spiraling around the outer peripheral surface of the channel tube material. In the spiral groove processing apparatus for an endoscope channel tube for forming a groove, a supply reel in which the grooved wire is wound around the wire supply device, a rotating device for rotating the supply reel, and a supply reel. A pulley suspended on the grooved wire between the channel tube material and a pulley supporting the pulley and applying a constant tension to the grooved wire via the pulley. Characterized by providing a pressing means Azukasuru.

According to a second aspect of the present invention, there is provided a rotary driving device having a collet chuck for holding a channel tube material into which a core is inserted, a wire feeder for feeding a grooved wire, and a centering supporting the core. With a jig, heating and rotating the surface of the channel tube material,
In the spiral groove processing device for an endoscope channel tube for winding the grooved wire and forming a spiral groove on the outer peripheral surface of the channel tube material, a supply reel in which the grooved wire is wound around the wire supply device. A rotating device for rotating the supply reel, a pulley suspended on the grooved wire between the supply reel and the channel tube material, and a grooved wire supporting the pulley and via the pulley. And a control device that connects the sensor and the pressing means, and detects the position of the pulley by the sensor. By monitoring the state of the spiral groove processing by this, while maintaining a constant pressing force by the pressing means by the control device, while the pressing force according to the state of the spiral groove processing So that, characterized by being configured to control said pressing means by the control device.

[0018]

According to the operation of the first aspect of the present invention, in the wire supply device, a supply reel having a grooved wire wound thereon, a rotating device for rotating the supply reel, and a supply reel and a channel tube material. A pulley suspended on the grooved wire, and a pressing means for supporting the pulley and applying a constant tension to the grooved wire via the pulley, thereby forming a groove wound around the channel tube material. The tension of the wire is stabilized, and the depth of the groove becomes uniform.

In the operation of the invention according to claim 2, in addition to the above operation, a sensor for detecting the position of the pulley in a non-contact manner, and a control device connecting the sensor and the pressing means are provided.
The state of the spiral groove processing is monitored by detecting the position of the pulley by the sensor, and while the pressing force by the pressing means is kept constant by the control device, the pressing force is adjusted according to the state of the spiral groove processing. Since the control device is configured to control the pressing unit, the position of the pulley detected by the sensor, that is, the amount of the wire supplied from the supply reel and the amount of the grooved wire wound around the channel tube material are determined. From the balance, the depth of the groove to be processed is determined, and the tension is controlled so that appropriate spiral groove processing can be performed appropriately, and the spiral groove processing is performed.

[0020]

(Embodiment 1) FIG. 1 shows Embodiment 1 and is a perspective view of an apparatus for processing a spiral groove of an endoscope channel tube (hereinafter referred to as the present apparatus). In FIG. 1, the apparatus generally includes a processing unit 1 that forms a spiral groove in a channel tube material 22 and a wire storage unit 2 that supplies and rewinds a grooved wire 26 to and from the channel tube material 22.
And a tension adjusting unit 3 for adjusting the tension of the grooved wire 26. In the present embodiment, the wire rod supply device includes a wire rod storing unit 2 and a tension adjusting unit 3.

First, the processing section 1 will be described. The collet chuck 23 holds the channel tube material 22 into which the core 21 has been inserted. This collet chuck 2
The rotating device 24 for driving the rotation of the shaft 3 and the centering jig 25 for supporting the end of the metal core 21 are arranged on a base table 47 so as to be aligned. A guide 29 parallel to the center axis of the channel tube material 22 through which the core metal 21 is inserted is provided on the base table, and a movable table 28 is provided on the guide 29, and the ball screw 4
9 is connected to the rotating device 48. Table 2
A thread 27 through which the grooving wire 26 passes is projected on the upper surface 8. On the other hand, a hook pin 31 for fixing the tip of the grooved wire 26 is provided on the outer periphery of the collet chuck 23. A heater 30 is provided so as to interlock with the movement of the table 28, and heats and softens the channel tube material 22.

Next, the wire rod storage section 2 will be described.
A support 50 is provided upright on the upper surface of the base table 47, and a rotating device 33 which is connected to the reel 32 and is driven to rotate with a constant torque is provided on the upper end of the support 50. A grooved wire 26 is wound around the outer periphery of the reel 32.
The grooved wire 26 is guided downward from the end of the second. A pulley 34 is disposed at a position in contact with the grooved wire 26, and the pulley 34 is rotated and driven by a rotating device 35 to supply and rewind the grooved wire 26.

Next, the tension adjusting section 3 will be described.
A guide 42 is fixed to the side surface of the base table 47 in the vertical direction, and the weight mounting table 41 is fitted so as to be vertically movable. A weight 39 is freely mounted on the weight mounting table 41, and a pulley 40 suspended from the grooved wire 26 is pivotally mounted. Further, a shielding plate 45 is attached to the weight mounting table 41, and photoelectric sensors 43 and 44 are disposed at positions where the shielding plate 45 can be detected at the upper and lower limits of the vertical movement of the weight mounting table 41. The pressing means in the present embodiment is composed of a weight mounting table 41 on which a pulley 40 is pivotally mounted and a weight 39.

Pulleys 36, 37, 38, 46 are provided at important points so that excessive force such as friction does not act on the grooved wire 26.
Are arranged. Of these, the pulley 36 has its rotation center fixed to the base table 47 and serves as a guide for the grooved wire 26 from the wire storage section 2 to the tension adjusting section 3. The pulley 37 is also fixed to the base table 47 similarly to the pulley 36, and serves as a guide from the tension adjusting unit 3 to the processing unit 1. The rotation center of the pulley 38 is also
The pulley 46 is fixed to the table 28
It is stuck to. The pulleys 38 and 46 are used for the grooving wire 26 regardless of the position of the table 28 at the time of spiral grooving.
The grooved wire is guided so as not to be cut or receive an extra force.

Next, the operation of the present embodiment will be described.
After supporting the channel tube material 22 through which the metal core 21 has been inserted by the collet chuck 23 and the centering jig 25, the tip of the grooved wire 26 is fixed to a hooking pin 31 provided on the collet chuck 23. The grooved wire 26 is supplied while applying a constant tension, and the collet chuck 23 is rotated by the rotating device 24 so that the channel tube material 2
Perform 2 rotations. The table 28 having the yarn mouth 27 protruding at a speed proportional to the rotation is moved along the guide 29 by a rotating device 48 via a ball screw 49 in a direction parallel to the longitudinal direction of the channel tube material 22 (in the direction of arrow X). . As a result, the grooved wire 26 is spirally wound around the outer circumference of the channel tube material 22 along the longitudinal direction, and the heater 30 heats and softens the channel tube material 22 during the winding operation, so that the outer circumference of the channel tube material 22 is softened. A spiral groove is formed. After the winding operation is completed, the grooved wire 26 is removed to obtain a channel tube provided with a spiral groove on the outer periphery.

The grooved wire 26 is wound around a reel 32 connected to a rotating device 33 that can be driven to rotate at a constant torque.
It is always available. The rotating device 33 is provided so that the grooved wire 26 always provided on the reel 32 cannot be unraveled by the weight of the weight mounting table 41 on which the weight 39 is mounted and the pulley 40.
Rotates in a direction in which the wire 26 is wound around the reel 32 with a constant torque that balances the gravity. The grooved wire 26 provided on the reel 32 is wound several times around a pulley 34 interlocking with a rotating device 35 for supplying and rewinding the grooved wire 26 so as not to slip on the pulley 34. , Through the pulley 36 and to the tension adjusting unit 3.

Next, the operation of supplying and rewinding the grooved wire 26 will be described. Both supply and rewinding of the grooved wire 26 are performed by breaking the state in which the torque of the rotating device 33 and the weight of the weight mounting device 41 on which the weight 39 is mounted and the gravity of the pulley 40 are balanced. The supply of the grooved wire 26 is performed by rotating the pulley 34 in a direction in which the grooved wire 26 provided on the reel 32 is released by the rotating device 35,
A weight placing device 4 on which the torque of the rotation places the weight 39.
1 and pulley 40 in addition to the gravitational force of rotating device 33.

The rewinding of the grooved wire 26 is performed by the rotating device 3
5, the pulley 34 is rotated in a direction in which the grooved wire 26 provided on the reel 32 is wound, and the rotation torque is added to the torque of the rotating device 33, and the weight mounting device 41 on which the weight 39 is mounted and the pulley 40 Is possible by overcoming the gravity of In the tension adjusting section, the grooved wire 2
6 is provided with a constant tension due to the gravity of the weight mounting device 41 on which the weight 39 is mounted and the pulley 40 by suspending the pulley 40 on the weight mounting device 41 on which the weight 39 is mounted. Therefore, by changing the weight of the weight 39, the tension can be adjusted.

Further, when the photoelectric sensor 43 detects the shielding plate 45 on the weight mounting table 41 during the spiral groove machining, the grooved wire 26 is less than usual, and the channel tube material 22 has more Is wound. Therefore, an abnormality of “shallow groove depth” is confirmed. When the photoelectric sensor 44 detects the shielding plate 45, the grooved wire 26 is left more than usual,
The channel tube material 22 is wound with less grooved wires 26 than usual. Therefore, an abnormality of “the groove depth is deep” is confirmed. The channel tube in which the abnormality is confirmed is discarded as defective. If an abnormality is confirmed, the weight of the weight 39 of the tension adjusting mechanism 3 is changed at both the upper and lower positions of the photoelectric sensors 43 and 44 so that the channel tube is non-defective.

The grooved wire 26 to which a constant tension is applied by the tension adjusting section 3 passes through a pulley 40 pivotally attached to a weight mounting table 41, and passes through a thread opening 27 via pulleys 37, 38 and 46. Is supplied or rewound to the channel tube material 22.

The pitch and the number of turns of the spiral groove formed in the channel tube material 22 are relatively determined by the rotation speed of the channel tube material 22 driven by the rotating device 24 and the moving amount of the table 28 driven by the rotating device 48. Is determined. Therefore, before processing, the rotation speeds of the rotation devices 24 and 48 are set to predetermined values.

The depth of the groove formed in the channel tube material 22 is determined by the tension of the wire supplied to the channel tube material 22 and the degree of softening of the channel tube material 26 by heating by the heater 30.
The heating temperature of the heater 30 is set by a heater control unit (not shown).

According to the present embodiment, when a spiral groove is formed in a channel tube material, it can be stably processed to a predetermined groove depth, and an endoscope channel tube with stable quality can be obtained. be able to. Further, since the tension adjusting mechanism of the grooved wire utilizes gravity, the structure of the apparatus can be simplified.

(Embodiment 2) FIG. 2 shows Embodiment 2 and is a perspective view of an apparatus for processing a spiral groove of an endoscope channel tube (hereinafter referred to as the present apparatus). In the present embodiment, only the configuration of the tension adjusting unit of the present apparatus is different from that of the first embodiment, and the other configuration is the same. Therefore, the same members are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 2, the tension adjuster 3 is controlled by an electro-pneumatic proportional valve 54 so as to maintain a constant pressure, an air cylinder 50 connected to the air cylinder 50, and a pivot table 51 pivotally connected to the push table 51. And a pulley 52. As in the first embodiment, the pulley 52 is suspended from the grooved wire 26. The push table 51 is fitted to a guide 53 fixed vertically on the side surface of the base table 47 so as to be vertically movable. Further, as in the first embodiment, a shielding plate 45 is fixed to the pressing table 51, and the photoelectric sensors 43 and 44 are located at positions where the shielding plate 45 can be detected at the upper and lower limits of the vertical movement of the pressing table 51. Are arranged. As in the first embodiment, pulleys 36, 37, 38, 46 are provided at important points as a measure to prevent extra force such as friction from being applied to the grooved wire 26.
Are arranged. Grooved wire 2 in the present embodiment
The pressing means for applying a constant tension to 6 is an air cylinder 50 for pressing a pressing table 51 on which a pulley 52 is pivotally attached.

The operation of the present embodiment is different from that of the first embodiment only in the operation of the tension adjusting section. The grooved wire 26 lifts a pulley 52 that is pivotally attached to a push table 51 connected to the air cylinder 50, whereby the pressing force of the air cylinder 50 causes
Constant tension is applied. By changing the voltage applied to the electropneumatic proportional valve 54 connected to the air cylinder 50, the pressing force acting on the grooved wire 26 changes, and the tension can be adjusted.

As in the first embodiment, at the time of spiral groove machining,
When the photoelectric sensor 43 detects the shielding plate 45 on the push table 51, the upper limit where the groove depth of the channel tube material 22 is shallow can be confirmed, and when the photoelectric sensor 44 detects it, the lower limit where the groove depth is deep is confirmed. When the upper and lower limits of the groove depth are detected, the voltage of the electropneumatic proportional valve 54 is changed to adjust the tension.

The grooved wire 26 to which a constant tension is applied by the tension adjusting unit 3 passes through a pulley 40 pivotally attached to a weight mounting table 41, and is inserted through a thread opening 27 via pulleys 37, 38, 46. Is supplied or rewound to the channel tube material 22.

The tension of the grooved wire 26 is determined by the torque of the rotating device 33 of the reel 32 and the rotating device 24 of the channel tube blank 22, and the pressure of the air cylinder 50 maintained at a constant pressure by the electropneumatic proportional valve 54. Is done.
The torque of the rotating device 33 of the reel 32 and the torque of the rotating device 24 of the channel tube blank 22 are separately set to predetermined torques. The predetermined torque is a value at which a set groove depth is obtained in the spiral groove processing of the channel tube material 22.

According to the present embodiment, when a spiral groove is formed in a channel tube material, it can be stably processed to a predetermined groove depth, and a stable quality endoscope channel tube is obtained. In addition, since the electro-pneumatic proportional control valve and the air cylinder are used for the tension adjusting mechanism, the tension of the grooved wire can be easily adjusted.

(Embodiment 3) FIG. 3 shows Embodiment 3 and is a perspective view of a spiral groove machining apparatus for an endoscope channel tube. In the present embodiment, a monitor mechanism is added to the tension adjusting section of the second embodiment, and only the portion will be described, and the other configuration is the same as that of the second embodiment. The reference numerals are used and the description is omitted.

In FIG. 3, a position sensor 5 for detecting a vertical position of a push table 51 on which a pulley 52 is pivotally mounted.
6 is disposed below the push table 51. An electro-pneumatic proportional control valve 54 for controlling the pressure in the air cylinder 50, which is a pressing means for the pulley 52, and a position sensor 56 for detecting the position of the pulley 52 are connected to a control device 55. The position sensor 56 is a non-contact type optical sensor that detects the vertical movement of the push table 51. Specifically, the position sensor 56 emits a laser beam and receives a reflected light thereof, so that an object ( Push table 5
This is a laser type position sensor that measures the relative distance to 1). Note that the photoelectric sensors 43 and 44 and the shielding plate 45 that existed in the configuration of the second embodiment have been removed in the present embodiment.

The operation of the present embodiment will be described. In the present embodiment, a grooved wire 26 supplied from a reel 32 is provided.
Grooved wire rod 2 wound around channel tube 22
6 (the amount of grooving wire 26 specified for machining)
This is detected at any time while performing spiral groove processing. The supply state of the grooved wire 26 is determined by detecting a vertical position of the push table 51 on which the pulley 52 is pivotally mounted between the reel 32 and the channel tube material 22 by a position sensor 56.

For example, when the push table 51 moves upward during the spiral groove machining, this is caused by a predetermined amount or more of the grooved wire 2.
6 is wound around the channel tube material 22;
That is, a state is shown in which the grooved wire rod 26 is wound around the channel tube material 22 with a shallowness equal to or less than a predetermined amount. When the position sensor 56 detects that the pulley 52 moves upward, the information is transmitted to the control device 55. Based on this information, the pulley 52 is pushed downward by controlling the air cylinder 50 to pressurize through the electropneumatic proportional valve 54, and the tension insufficient for proper spiral groove processing is compensated.

On the other hand, when the push table 51 moves downward during the spiral groove processing, this is because the pressing table 51 is moved downward by a predetermined amount or less.
This shows a state in which the grooved wire 26 is wound around the channel tube material 22 at a depth of a predetermined amount or more. When the position sensor 56 detects that the pulley 52 moves downward, the information is transmitted to the control device 55. Based on this information, the pulley 52 is returned upward by controlling the pressure of the air cylinder 50 through the electropneumatic proportional valve 54 to reduce excessive tension for proper spiral groove machining.

If the supply of the grooved wire 26 and the grooved wire 26 used for processing are as set, that is, if they are equal, the vertical position of the pulley 52 does not change.
The tension is kept constant as set by the operation of the electropneumatic proportional control valve 54 and the air cylinder 50. Other operations of the present embodiment are the same as those of the first and second embodiments, and therefore, description thereof will be omitted.

According to the present embodiment, when a spiral groove is formed in a channel tube material, it can be stably processed to a predetermined groove depth, and a stable quality endoscope channel tube is obtained. In addition, the tension applied to the grooved wire is monitored and the tension is automatically controlled by feedback control to the electro-pneumatic proportional control valve that controls the pressure in the air cylinder so that the tension is always appropriate. Adjustment can prevent a problem that the groove is too deep or too shallow.

In the present invention, the position sensor of the present embodiment may be used in place of the photoelectric sensor of the first or second embodiment.

[0049]

According to the first aspect of the present invention, when a spiral groove is formed in a channel tube material, it can be stably processed to a predetermined groove depth, and a stable quality for an endoscope. A channel tube can be obtained.

According to the second aspect of the invention, in addition to the effect of the first aspect, since the tension applied to the grooved wire is automatically adjusted, stable processing can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spiral groove machining apparatus for an endoscope channel tube according to a first embodiment.

FIG. 2 is a perspective view of a spiral groove processing device for an endoscope channel tube according to a second embodiment.

FIG. 3 is a perspective view of a device for processing a spiral groove of an endoscope channel tube according to a third embodiment;

FIG. 4 is a half-sectional view of a guide tube for an endoscope according to Prior Art 1;

FIG. 5 is a schematic configuration diagram of an apparatus for processing a spiral groove of an endoscope channel tube according to prior art 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing part 2 Wire rod storage part 3 Tension adjustment part 21 Core metal 22 Channel tube material 23 Collet chuck 24 Rotation drive device 25 Centering jig 26 Grooving wire rod 32 Reel 39 Weight 40 Pulley 41 Weight mounting table

Claims (2)

[Claims] A rotary driving device having a collet chuck for holding a channel tube material having a core inserted therein, a wire feeder for feeding out a grooved wire, and a centering jig for supporting the core; The surface of the channel tube material is rotated while being heated, the grooved wire is wound, and a spiral groove processing apparatus for an endoscope channel tube for forming a spiral groove on the outer peripheral surface of the channel tube material. A supply reel on which the grooved wire is wound, a rotating device for rotating the supply reel, a pulley suspended on the grooved wire between the supply reel and the channel tube material, And a pressing means for supporting a pulley and applying a constant tension to said grooved wire rod via said pulley. Spiral groove processing equipment 2. A rotary driving device having a collet chuck for holding a channel tube material having a cored bar inserted therein, a wire feeder for feeding out a grooved wire, and a centering jig for supporting the cored bar, The surface of the channel tube material is rotated while being heated, the grooved wire is wound, and a spiral groove processing apparatus for an endoscope channel tube for forming a spiral groove on the outer peripheral surface of the channel tube material. A supply reel on which the grooved wire is wound, a rotating device for rotating the supply reel, a pulley suspended on the grooved wire between the supply reel and the channel tube material, Pressing means for supporting a pulley and applying a constant tension to the grooved wire via the pulley, a sensor for detecting the position of the pulley in a non-contact manner, A control device connected to the sensor and the pressing means is provided, and the state of the spiral groove processing is monitored by detecting the position of the pulley by the sensor, and the pressing force by the pressing means is kept constant by the control device. A spiral groove processing device for an endoscope channel tube, wherein the pressing device is controlled by the control device so as to maintain a pressing force according to a state of the spiral groove processing.