JP2006020884A - Treating tool raising device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treating tool raising device for an endoscope with excellent workability capable of easily adjusting, readjusting and assembling the proximal end position of a guide tube to which a raising piece operation wire for remotely operating a treating tool raising piece is inserted into an operation part. <P>SOLUTION: By forming a plurality of peripheral direction grooves 22a capable of being engaged and disengaged with/from a stopper seat 21 fixedly arranged on the operation part 4 at an interval from each other in an axial direction on the outer peripheral surface of a stopper cylinder body 22 fixed to the proximal end part of the guide tube 8 and selecting the peripheral direction groove 22a to be engaged with the stopper seat 21, the fixing position of the proximal end part of the guide tube 8 to the operation part 4 can be adjusted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a treatment instrument raising device for an endoscope.

  In a treatment instrument raising apparatus for an endoscope, generally, a raising piece operation wire for remotely operating a treatment instrument raising piece disposed at the distal end of an insertion portion from an operation portion connected to a proximal end of the insertion portion is provided. The guide tube is inserted through the entire length of the insertion portion so as to be movable forward and backward in the axial direction.

  As such a guide tube, a tightly wound coil pipe is generally used, and when the insertion portion is bent, when the insertion portion is bent, the guide tube is in a state where the insertion portion is straight. It is assembled in a state where it is pushed into the insertion portion by a few millimeters from the operation portion side so that the insertion portion is slightly waved.

Therefore, the proximal end of the guide tube needs to be positioned and fixed strictly in the operation section. Conventionally, the proximal end cap attached to the proximal end of the guide tube by brazing or soldering is fixed to the operation section. The base end cap is engaged with the operation member so as not to move in the axial direction by being fitted into a receiving member provided from the side (for example, Patent Document 1).
Japanese Patent Publication 4-45177

As described above, since the proximal end of the guide tube needs to be positioned precisely in the operation portion, it is often necessary to readjust after being assembled once.
Then, in the conventional endoscope treatment tool raising device as described above, it is necessary to perform brazing and soldering again in a state where the position of the base end cap with respect to the base end portion of the guide tube is slightly moved. Adjustment work was cumbersome and time-consuming, and workability was very poor.

  Therefore, the present invention can easily adjust and readjust the base end position of the guide tube through which the raising piece operation wire for remotely operating the treatment tool raising piece is inserted into the operation portion. An object of the present invention is to provide an endoscope treatment tool raising device with good workability.

  In order to achieve the above object, the treatment instrument raising device for an endoscope of the present invention remotely operates a treatment instrument raising piece arranged at the distal end of an insertion portion from an operation portion connected to a proximal end of the insertion portion. In the treatment instrument raising device of the endoscope, the raising piece operating wire is inserted into the insertion portion so as to be able to advance and retreat in the axial direction, and is fixed to the proximal end portion of the guide tube. A plurality of circumferential grooves that can be engaged with and disengaged from the stopper seat fixedly arranged on the operation portion are formed on the outer peripheral surface of the stopper cylinder, spaced apart from each other in the axial direction. By selecting the circumferential grooves to be engaged with each other, the fixing position of the proximal end portion of the guide tube with respect to the operation portion can be adjusted.

  The engaging portion on the stopper seat side that engages and disengages with the circumferential groove of the stopper cylinder is formed in a substantially U-shaped fork, and the circumferential groove of the stopper cylinder is engaged and disengaged from the open side. If the circumferential groove is formed over the entire circumference of the stopper cylinder, handling is easy.

  According to the present invention, the stopper cylinder is fixed to the proximal end portion of the guide tube into which the raising piece operating wire for remotely operating the treatment instrument raising piece is inserted, and the peripheral circumference of the stopper cylinder is By forming the directional groove and selecting the circumferential groove to be engaged with the stopper seat, the fixing position of the proximal end portion of the guide tube with respect to the operation portion can be easily adjusted and readjusted and assembled.

  A plurality of circumferential grooves that can be engaged and disengaged with respect to the stopper seat fixedly disposed in the operation portion are spaced apart from each other in the axial direction on the outer peripheral surface of the stopper cylinder fixed to the proximal end portion of the guide tube. The fixing position of the proximal end portion of the guide tube with respect to the operation portion can be adjusted by selecting a circumferential groove that is formed open and engaged with the stopper seat.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows an endoscope. In the vicinity of the distal end of the flexible insertion portion 1 covered with a flexible tube, a curved portion 1a having a skeleton structure in which a large number of node rings are connected to each other by rivets is provided. Is formed.

  The distal end portion 2 where the observation window and the illumination window are arranged is connected to the distal end portion of the bending portion 1a (that is, the most distal portion of the insertion portion 1), and protrudes outward from the distal end portion main body 2. A treatment instrument raising piece 3 for changing the protruding direction of the distal end portion 100 a of the treatment instrument 100 is movably disposed on the distal end portion body 2. The treatment instrument 100 is inserted into and removed from a treatment instrument insertion channel (not shown) that is inserted and disposed throughout the entire length of the insertion portion 1.

  A bending operation knob 5 for remotely bending the bending portion 1a is arranged on the operation portion 4 connected to the base end of the insertion portion 1. By operating the bending operation knob 5, the bending portion 1a is operated. Can be bent at any angle in any direction.

  Further, as shown by an arrow in FIG. 3, when the raising piece operating lever 6 disposed in the operation section 4 is rotated, the raising piece operating wire 7 is moved forward and backward in the axial direction, thereby starting the treatment instrument. The upper piece 3 is driven, and the protruding direction of the distal end portion 100a of the treatment instrument 100 from the distal end portion main body 2 can be arbitrarily changed.

  The raising piece operating wire 7 is inserted and arranged in a guide coil 8 (guide tube) made of a tightly wound coil pipe that is inserted and arranged over the entire length in the insertion portion 1 so as to be movable forward and backward in the axial direction. From the operation unit 4 side, the distal end is fixed to the distal end body 2 and the proximal end is fixed to the operation unit 4 and the insertion unit 1 is slightly wavy when the insertion unit 1 is straight. It is incorporated in the pushed-in state.

  FIG. 4 shows a configuration in the operation section 4 of the treatment instrument raising apparatus for the endoscope, and 10 is a piston-like member for connecting the raising piece operating lever 6 and the raising piece operating wire 7, 11. Is a cylinder-like member into which the piston-like member 10 is inserted, and 20 is a guide tube fixing portion for positioning and fixing the proximal end portion of the guide coil 8 with respect to the frame 4a of the operation portion 4 in an adjustable manner.

  FIG. 1 shows such a guide tube fixing portion 20, 21 is a stopper seat fixed to the frame 4 a of the operation portion 4 with screws, and 22 is engaged with and disengaged from the stopper seat 21. It is a cylindrical stopper cylinder fixed to the base end portion of the guide coil 8 so as to be able to.

  The stopper cylinder 22 is fixed to the proximal end portion of the guide coil 8 so that the axial position of the guide coil 8 coincides, and the raising piece operating wire 7 is loosely inserted into the through hole formed at the axial position. Has been.

  A plurality (four in this embodiment) of circumferential grooves 22a are formed on the outer peripheral surface of the stopper cylinder 22 at intervals in the axial direction. Since each circumferential groove 22a is formed over the entire circumference, there is no need to worry about the fixing direction of the stopper cylinder 22 with respect to the guide coil 8, and the handling during manufacture is easy.

  As shown in FIG. 5 illustrating the VV cross section in FIG. 1, the stopper seat 21 has an engagement portion 21 a that engages with and disengages from the circumferential groove 22 a of the stopper cylinder 22 in a substantially U-shaped fork shape. The circumferential groove 22a of the stopper cylinder 22 can be engaged / disengaged from the opening portion side, and the circumferential groove 22a of the stopper cylinder 22 is engaged with the engaging portion 21a of the stopper seat 21. In this state, the stopper cylinder 22 cannot move in the axial direction, and the proximal end portion of the guide coil 8 is fixed to the frame 4 a of the operation unit 4.

  Then, the stopper cylinder 22 is engaged with and disengaged from the opening portion side of the engaging portion 21a with respect to the stopper seat 21, and is engaged with the engaging portion 21a of the stopper seat 21, for example, as shown in FIG. By selecting the circumferential groove 22a on the stopper cylindrical body 22 side, the fixing position of the proximal end portion of the guide coil 8 with respect to the operation portion 4 (that is, the pushing amount of the guide coil 8 into the insertion portion 1) can be easily adjusted. And can be readjusted.

  In addition, this invention is not limited to the said Example, For example, what is necessary is just to change suitably the specific shape etc. of the stopper seat 21 and the stopper cylinder 22 according to the actual condition.

It is front sectional drawing of the guide pipe fixing | fixed part of the treatment tool raising apparatus of the endoscope of the Example of this invention. It is front sectional drawing of the state which adjusts the fixing position in the guide pipe fixing | fixed part of the treatment tool raising apparatus of the endoscope of the Example of this invention. 1 is a side view showing an overall configuration of an endoscope according to an embodiment of the present invention. It is a schematic sectional drawing which shows the structure in the operation part of the treatment tool raising apparatus of the endoscope of the Example of this invention. 1. It is VV sectional drawing in FIG. 1 of the treatment tool raising apparatus of the endoscope of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 3 Treatment tool raising piece 4 Operation part 6 Raising piece operation lever 7 Raising piece operation wire 8 Guide coil (guide tube)
20 Guide tube fixing part 21 Stopper seat 21a Engagement part 22 Stopper cylinder 22a Circumferential groove

Claims (3)

A guide in which a raising piece operation wire for remotely operating a treatment instrument raising piece arranged at the distal end of the insertion portion from an operation portion connected to the proximal end of the insertion portion is inserted through the entire length of the insertion portion. In the endoscope treatment instrument raising device inserted in the tube so as to be movable back and forth in the axial direction,
A plurality of circumferential grooves that can be engaged with and disengaged from the stopper seat fixedly disposed on the operation portion are formed on the outer peripheral surface of the stopper cylinder fixed to the proximal end portion of the guide tube in the axial direction. The fixed position of the proximal end portion of the guide tube with respect to the operation portion can be adjusted by selecting the circumferential groove that is formed at an interval and is engaged with the stopper seat. Endoscopic treatment instrument raising device characterized by the above. The engaging portion on the stopper seat side that engages and disengages with the circumferential groove of the stopper cylinder is formed in a substantially U-shaped fork shape, and the circumferential groove of the stopper cylinder is engaged and disengaged from the open side. The endoscope treatment instrument raising apparatus according to claim 1, which can be made to operate. The endoscope treatment instrument raising device according to claim 1 or 2, wherein the circumferential groove is formed over the entire circumference of the stopper cylinder.

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