JP3986174B2 - Endoscope channel tube spiral groove processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope channel tube spiral groove processing apparatus that forms a spiral groove on the outer periphery of an endoscope channel tube.
[0002]
[Prior art]
FIG. 2 shows a conventional spiral groove processing apparatus for a channel tube for an endoscope described in JP-A-6-121771.
[0003]
In this apparatus, a rotating device 103 having a chuck 102 that holds one end of a channel tube 101 (hereinafter referred to as a tube) 101 through which the core metal 100 is inserted, and a centering jig that supports the end of the core metal 100. The tool (center push stand) 104 is arranged on a straight line. A table 110 is provided between the chuck 102 and the centering jig 104 so as to be parallel to the central axis of the tube 101 and movable along the guide member 111 in the longitudinal direction of the tube 101.
[0004]
A wire supply device 106 for supplying the grooving wire 105, a tube pressing support member 112, and a return tube pressing support member 116 are attached to the table 110.
[0005]
A tube pressing roller 113 is provided at the distal end portion of the tube pressing support member 112. The tube pressing support member 112 is provided with an adjusting screw 114 for adjusting the position when the tube pressing roller 113 and the tube 101 are brought into contact with each other. On the other hand, a return tube pressing roller 115 is attached to the return tube pressing support member 116. In addition to the above, a heater 109 for heating the tube 101 is disposed.
[0006]
In the processing apparatus having this structure, at the start of processing of the spiral groove in the tube 101, the tube pressing support member 112 is moved in the direction of the tube 101 perpendicularly to the central axis of the tube 101, and the tube pressing roller 113 provided at the distal end. Is brought into contact with the outer peripheral surface of the tube 101. Then, the rotating device 103 rotates the tube 101 and moves the table 110 toward the centering jig 104 at a predetermined speed. As a result, the wire 105 whose tip is fixed to the hooking pin 102a of the chuck 102 is wound around the outer peripheral surface of the tube 101 at a predetermined pitch while a certain tensile force is applied by the wire supply device 106, and spirals around the outer peripheral surface. Grooves are formed.
[0007]
During the winding process, the tube pressing support member 112 on the table 110 moves together with the wire supply device 106, so that the tube pressing roller 113 contacts along the outer peripheral surface of the tube 101 near the winding opening of the wire 105, and the wire rod The tube 101 moves while preventing bending of the tube 101 caused by the pulling force applied to 105. At the time of this processing, the heater 109 heats the wire winding opening of the tube 101.
[0008]
As described above, when the grooving process of a predetermined length is completed, the tube pressing roller 113 is separated from the tube 101, and the table 110 is moved in the direction of the chuck 102 while the tube 101 is reversely rotated by the rotating device 103. As a result, the wire material supply device 106 winds the wire 105 that has been formed into a groove from the tube 101.
[0009]
Further, when the rotating device 103 rotates in the reverse direction and the wire supplying device 106 winds up the wire 105, the return tube pressing support member 116 moves forward in the direction of the tube 101 so that the tube 101 does not bend. The pressing roller 115 contacts the outer periphery of the tube 101. At the same time, the tube pressing support member 112 is retracted from the tube 101, and the tube pressing roller 113 is separated from the tube 101.
[0010]
[Problems to be solved by the invention]
In such a conventional apparatus, the tube 101 is rotated by rotating the chuck 102 by the rotating device 103 in a state where one end of the tube 101 is held by the chuck 102. At this time, the cored bar 100 is rotated by the winding force of the wire 105 around the tube 101. In such a structure, when the range for forming the spiral groove of the tube 101 is short or when the tube diameter is large (the thickness of the tube 101 is thick), the spiral groove can be formed satisfactorily.
[0011]
However, when the range for forming the spiral groove is long, or when the tube is thin or the tube diameter is thin (thin tube is thin), the chuck 102 is rotated by the resistance of the tube pressing roller 103 or the wire 105. There is a problem in that the rotation of the portion other than the chuck 102 does not match and the tube 101 is twisted. In addition to this, there is a problem that the shape of the spiral groove collapses or, in an extreme case, the tube 101 is threaded at the end face of the chuck 102.
[0012]
The present invention has been made in consideration of such problems of the prior art, and forms a spiral groove in a channel tube even when the range in which the spiral groove is formed is long or when the thin tube or the tube diameter is thin. An object of the present invention is to provide a helical groove processing apparatus for an endoscope channel tube.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is the spiral groove processing apparatus for an endoscope channel tube that forms a spiral groove by winding a wire around an outer periphery while rotating the endoscope channel tube. a first bearing member rotatable for rotatably supporting one end of the endoscope channel tube, rotatably supports the slidable and the other end of the endoscope channel tube to its longitudinal A second support member, a drive source for generating a drive force for rotating the endoscope channel tube, the first support member and the second support member based on the drive force of the drive source And a rotational force transmitting means for rotating the motor in synchronization with each other.
[0014]
In the present invention, one end of the endoscope channel tube is rotatably supported, the other end of the second of the endoscope channel tube Ri by the bearing member is rotatably supported by the first supporting member The The driving source generates a driving force for rotating the endoscope channel tube, and the rotational force transmitting means synchronizes the first supporting member and the second supporting member based on the driving force of the driving source. Rotate. For this reason, even if it is a long tube, a thin wall, or a thin tube, the whole rotates integrally, and it can prevent that a tube twists and the shape of a spiral groove collapses.
[0015]
Invention of Claim 2 is invention of Claim 1 , Comprising: The low-friction resin part was provided in the part which contacts the said channel tube for endoscopes in the said 2nd support member, It is characterized by the above-mentioned. To do.
[0016]
According to the present invention , the low friction resin portion is provided in the portion of the second support member that contacts the endoscope channel tube, so that the endoscope channel tube can be prevented from being damaged.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view of a spiral groove processing apparatus for an endoscope channel tube according to an embodiment of the present invention.
[0018]
In this processing apparatus, a first rotary support 4 having a chuck 3 that holds one end of a channel tube (hereinafter referred to as a tube) 2 through which a core metal 1 is inserted, A tube receiver 5 that holds the other end portion of the tube 2 by inserting the end portion on the side is provided.
[0019]
The rotation axis of the chuck 3, the rotation axis of the tube receiver 5, and the rotation axis of the tube 2 are installed so as to coincide. A pulley 20 that is directly connected to the chuck 3 is attached to the first rotating support 4. In this case, the first rotary support 4 is provided with a bearing (not shown) so that the chuck 3 and the pulley 20 can rotate smoothly.
[0020]
The tube receiver 5 is formed with a pulley groove 21 having the same diameter and the same shape as the pulley 20. The tube receiver 5 is rotatably supported by the second rotary support 22 via a bearing 22a.
[0021]
In such a structure, the chuck 3 constitutes a rotatable first bearing member that supports one end of the tube 2, while the tube receiver 5 constitutes a rotatable second bearing member that supports the other end of the tube 2. It is composed.
[0022]
The tube receiver 5 in this embodiment has a center hole diameter set slightly larger than the diameter of the tube 2. This is because the tube 2 extends in the axial direction when the wire 6 is wound around the tube 2 while being heated by the heater 10 to be described later, so that a predetermined clearance is required between the tube receiver 5 and the tube 2. It is.
[0023]
Further, the entire tube receiver 5 or at least a portion in contact with the tube 2 is formed of a low friction resin such as tetrafluoroethylene (trade name Teflon). As described above, the tube 2 is rubbed against the tube receiver 5 by extending in the axial direction. This rubbing causes a scratch depending on the material of the tube receiver 5. In order to prevent this, the tube receiver 5 is formed of a low friction resin.
[0024]
The chuck 3 and the tube receiver 5 are transmitted with rotational force by a single motor 23 as a drive source. The rotational force transmitting member 30 for transmitting the rotational force includes a transmission shaft 26 connected to the rotation shaft 23a of the motor 23 and a coupling 27, transmission pulleys 24 and 25 attached to the transmission shaft 26, and one transmission. The belt 28 spans the pulley 24 and the pulley 20 on the chuck side, and the belt 29 spans the other transmission pulley 29 and the pulley groove 21 of the tube receiver 5.
[0025]
The transmission shaft 26 is parallel to the rotation axes of the tube 2, chuck 3 and tube receiver 5, the transmission shafts 24 and 25 are formed to have the same diameter and the same shape, and the belts 28 and 29 have the same length and the same shape. It is molded into. Further, as described above, the pulley groove 21 of the tube receiver 5 has the same diameter and the same shape as the pulley 20 on the chuck 3 side.
[0026]
By setting in this way, when the motor 23 is driven, the rotational force is transmitted to the chuck 3 and the tube receiver 5 at the same time, and the chuck 3 and the tube receiver 5 are rotated in the same direction at the same rotational speed. Then, this rotational force is transmitted from both ends of the tube 2. Therefore, even if the tube 2 is long or thin, the entire tube 2 can be rotated in synchronization with each other, so that the tube 2 is not twisted and the spiral groove is not broken.
[0027]
In addition to the above, in order to form a spiral groove in the tube 2, a member similar to the conventional member is provided in the processing apparatus of this embodiment. That is, the table 11 is movably attached to the guide member 12 parallel to the tube 2. The table 11 includes a wire feeder 7 for supplying the wire 6 to the tube 2, a tube pressing support member 13 having a tube pressing roller 14 that contacts the tube 2 and presses the tube 2, and a return tube pressing member. A return tube pressing support member 17 provided with a roller 16 is attached. The position of the tube pressing roller 14 is adjusted by an adjusting screw 15. It is also possible to provide a heater 10 for heating the winding opening of the wire 6.
[0028]
In this embodiment, the rotational force of the motor 23 is transmitted to the chuck 3 via the transmission pulley 24, the belt 28 and the pulley 20. Further, the rotational force of the motor 23 is simultaneously transmitted to the tube receiver 5 via the transmission shaft 26, the transmission pulley 25, the belt 29 and the pulley groove 21. The chuck 3 and the tube receiver 5 are transmitted with the rotational force of the motor 23 branched and rotated in the same direction and at the same rotation speed.
[0029]
On the other hand, both ends of the tube 2 are supported by the chuck 3 and the tube receiver 5, but the chuck 3 and the tube receiver 5 rotate in the same manner in synchronism, so that the tube 2 is wound to form a spiral groove. The rotation of the chuck 3 portion and the rotation of the portions other than the chuck 3 do not differ due to the resistance of the wire rod 6 and the tube pressing roller 14 and the like, and the twist of the tube 2 due to the different rotation is eliminated. As a result, the spiral groove does not collapse or the tube 2 is not broken in an extreme case.
[0030]
Therefore, processing into a tube having a long range for forming the spiral groove, a thin tube, or a tube having a small diameter is possible. Moreover, since the force in the twisting direction is eliminated even for a tube having a short spiral groove forming range or a tube having a large tube diameter, the accuracy of the spiral groove is improved.
[0031]
In this embodiment, the motor 23 and the transmission shaft 26 are directly connected, but these may be connected via a speed reducer to adjust the rotational torque. When a reduction gear is provided, the rotation shaft 23a of the motor 23 and the rotation shafts of the chuck 3 and the tube receiver 5 can be made orthogonal to each other depending on the shape thereof.
[0032]
From the contents described above, the present invention includes the following inventions.
(1) In an endoscopic channel tube spiral groove processing apparatus that forms a spiral groove by winding a wire around the outer periphery while rotating the endoscope channel tube, one end of the endoscope channel tube is supported. A rotatable first support member, a rotatable second support member for supporting the other end of the endoscope channel tube, and a drive for simultaneously rotating the first support member and the second support member A spiral groove for an endoscope channel tube, comprising: a power source; and a rotational force transmitting member that transmits rotational force from the driving source to the first support member and the second support member. apparatus.
[0033]
In this invention, the rotational force of the driving source is transmitted to the first and second support members, and these support members transmit the rotational force to the tube from both ends, so that the entire tube is integrated. Rotation, and twisting and the shape of the spiral groove are not broken.
[0034]
(2) The endoscope according to (1), wherein the drive source rotates the first support member and the second support member in the same direction at the same rotation speed. Spiral groove processing equipment for channel tubes.
[0035]
In the present invention, the first and second support members rotate in the same direction and at the same number of rotations, so that the entire tube is rotated in synchronism and is not twisted or the spiral groove is not broken.
[0036]
(3) The invention described in (1) or (2) above, wherein the first support member, the second support member, and the endoscope channel tube have the same rotation axis. Endoscopy channel tube spiral groove processing device.
[0037]
Since the rotation axes of the first and second support members and the endoscope channel tube are the same, the rotational force transmission path is simplified, and the rotational forces of the first and second support members are reduced. Good transmission to the endoscope channel tube.
[0038]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the first and second support members supporting both ends of the endoscope channel tube rotate synchronously , the endoscope channel tube Rotational force is applied from both ends. For this reason, even if it is a long tube, a thin wall, or a thin tube, the whole rotates integrally, and it can prevent that a tube twists and the shape of a spiral groove collapses.
[0039]
According to the second aspect of the present invention , the low friction resin portion is provided in the portion of the second support member that comes into contact with the endoscope channel tube, so that the endoscope channel tube is damaged. Can be prevented.
[Brief description of the drawings]
FIG. 1 is an overall plan view of an embodiment of the present invention.
FIG. 2 is a plan view of a conventional whole.
[Explanation of symbols]
2 Endoscope channel tube 3 Chuck (first support member)
5 Tube receiver (second support member)
6 Wire material 23 Motor 30 Rotational force transmission member

Claims (2)

In the spiral groove processing device for an endoscope channel tube that forms a spiral groove by winding a wire around the outer periphery while rotating the endoscope channel tube,
A first bearing member rotatable to rotatably supporting one end of the endoscope channel tube,
A second support member that supports the endoscope channel tube so as to be slidable in the longitudinal direction and rotatably supported at the other end ;
A driving source for generating a driving force for rotating the endoscope channel tube;
Rotational force transmitting means for rotating the first support member and the second support member in synchronization with each other based on the driving force of the drive source;
A spiral groove processing device for an endoscope channel tube, comprising: The helical groove processing device for an endoscope channel tube according to claim 1, wherein a portion of the second support member that contacts the endoscope channel tube is provided with a low friction resin portion. .

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