JP4589664B2 - Endoscope treatment device raising device - Google Patents

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 must be positioned precisely in the operation section. Conventionally, a proximal end cap attached to the proximal end of the guide tube by brazing or soldering is fixedly provided on the operation section. The base end was fitted into the receiving member from the side, and the base end cap was locked to the operation portion so as not to move in the axial direction (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.

  Accordingly, the present invention provides workability that allows the proximal end position of the guide tube, through which the raising piece operation wire for remotely operating the treatment tool raising piece to be inserted, to be easily readjusted with respect to the operation portion. It is an object of the present invention to provide a treatment instrument raising device for an endoscope.

  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 for an endoscope inserted into the guide tube, which is inserted through the entire length of the insertion portion so as to be able to advance and retreat in the axial direction, the raising piece operation wire for making contact with the proximal end surface of the guide tube The screw stopper is formed by a screw member in which a through hole through which the raising piece operation wire passes loosely is formed at the axial position, and the screw stopper is screwed to a stopper seat fixedly disposed in the operation portion, By rotating the screw stopper around the axis, the screw stopper moves in the axial direction so that the positioning of the proximal end portion of the guide tube can be adjusted.

The most part of the guide tube may be formed by a tightly wound coil pipe.
The screw stopper may be formed in a bolt shape in which a through hole for passing the raising piece operation wire is formed at the axial position. In this case, the stopper seat is a female screwed with the screw stopper. A screw may have a cylindrical portion formed at one end.

  Further, a rotation stopping means that is slidable in the axial direction with respect to the stopper seat but prevents rotation around the axis may be provided at the proximal end portion of the guide tube.

  According to the present invention, the screw stopper that contacts the proximal end surface of the guide tube is formed by the screw member in which the through hole through which the raising piece operation wire passes loosely is formed at the axial position, and is fixedly disposed on the operation portion. By screwing the screw stopper into the stopper seat and rotating the screw stopper around the axis, the screw stopper can move in the axial direction to adjust the positioning of the proximal end portion of the guide tube. Since it did in this way, the proximal end position of the guide tube in which the raising piece operation wire for remote-controlling the treatment tool raising piece can be easily readjusted and assembled to the operation portion.

  A raising piece operation wire for remotely operating the treatment instrument raising piece arranged at the distal end of the insertion portion from the operation portion connected to the proximal end of the insertion portion is inserted into the guide tube which is inserted through the entire length of the insertion portion. In the endoscope treatment instrument raising device inserted so as to be able to advance and retreat in the axial direction, a through hole through which the raising piece operation wire passes loosely is formed at the axial position of the screw stopper that contacts the proximal end surface of the guide tube. The screw stopper is screwed into a stopper seat fixedly arranged on the operation portion, and the screw stopper is rotated around the axis, so that the screw stopper moves in the axial direction. The positioning of the proximal end portion of the guide tube can be adjusted.

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 that is inserted and disposed over the entire length in the insertion portion 1.

  A bending portion operation knob 5 for remotely bending the bending portion 1a is disposed on the operation portion 4 connected to the base end of the insertion portion 1, and bending by operating the bending portion operation knob 5 is performed. The part 1a can be bent at an arbitrary angle in an arbitrary 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 in which the piston-like member 10 is slidably inserted in the axial direction, and 20 is a guide tube for positioning and fixing the base end portion of the guide coil 8 with respect to the frame 4a of the operation unit 4 in an adjustable manner. It is a fixed part.

  FIG. 1 shows such a guide tube fixing portion 20, and 21 is a stopper seat fixed to the frame 4 a of the operation portion 4 with screws. In this embodiment, for ease of manufacture, the stopper seat 21 includes a frame fixing portion 21A fixed to the frame 4a with screws, and a frame fixing portion with the axis direction parallel to the frame 4a. The stopper support portion 21B locked to 21A is divided into two parts.

  Then, as shown in FIG. 5 illustrating a VV cross section in FIG. 1, a U-shaped engagement groove and a stopper formed in the frame fixing portion 21 </ b> A in a direction perpendicular to the frame 4 a of the operation portion 4. The circumferential groove formed on the outer peripheral portion of the support portion 21B is engaged, and the stopper support portion 21B is engaged with the frame fixing portion 21A so as not to move in the axial direction.

  A pair of ear pieces 9a (anti-rotation means) protrude laterally at the base end portion of the guide coil 8 at a 180 [deg.] Symmetrical position as shown in FIG. 6 showing the VI-VI cross section in FIG. The formed base end cap 9 is fixed by brazing or the like, and a guide tube for inserting and guiding the raising piece operating wire 7 is constituted by the guide coil 8 and the base end cap 9, and the outer end face of the base end cap 9 Is the base end face of the guide tube.

  In the front half of the stopper support portion 21B of the stopper seat 21, a slit 22 into which the ear piece 9a of the base end cap 9 is slidably fitted is formed in a direction parallel to the axis. Accordingly, the base end cap 9 cannot rotate around the axis with respect to the stopper support portion 21B, but is slidable in the axial direction.

  In the vicinity of the proximal end of the stopper support portion 21B formed in a cylindrical shape, a female screw is formed on the inner surface portion and a male screw is formed on the outer surface portion, and the cylindrical member 11 is formed on the outer surface male screw portion. The front end portion is detachably screwed.

  Further, a bolt-shaped screw stopper 24 in which a through-hole through which the raising piece operation wire 7 passes loosely is formed at the axial position is screwed into the inner surface female screw portion of the stopper support portion 21B from the base end side. . Reference numeral 25 denotes the screwing portion.

  Then, the outer end surface of the base end cap 9 (that is, the base end surface of the guide tube) abuts on the front end surface of the screw stopper 24 in the stopper support portion 21B, and the raising piece operating wire 7 is formed on the screw stopper 24. It passes through the through hole.

  Therefore, as shown in FIG. 2, in a state where the cylindrical member 11 is removed from the stopper support portion 21B and retracted, the screw stopper 24 is rotated in the axial direction by rotating the screw stopper 24 around the axis. By moving (screwing), the contact position of the base end cap 9 with respect to the outer end surface is changed, and the positioning state of the base end portion of the guide coil 8 can be easily readjusted.

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 positioning in the guide tube 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. It is VI-VI 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)
9 Base end cap (guide tube)
9a Ear piece (rotation stop means)
20 Guide pipe fixing part 21 Stopper seat 21B Stopper support part 22 Slit 24 Screw stopper 25 Screw part

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 forward and backward in the axial direction,
A bolt-shaped screw member in which a through-hole through which the raising piece operation wire passes loosely is formed at the axial position forms a screw stopper that contacts the base end surface of the guide tube in series, and is fixed to the operation portion. The screw stopper is screwed into the inner peripheral thread portion of the stopper seat disposed in the shaft, and the screw stopper is rotated around the axis, whereby the screw stopper moves in the axial direction and the guide tube The positioning of the base end can be adjusted, and the base end portion of the guide tube is engaged with the stopper seat so that it can slide in the axial direction but cannot rotate about the axis. An endoscope treatment tool raising device characterized by that.   The endoscope treatment instrument raising device according to claim 1, wherein most of the guide tube is formed by a tightly wound coil pipe. The endoscopic treatment instrument raising device according to claim 1 or 2 , wherein the stopper seat has a cylindrical portion formed at one end with a female screw screwed into the screw stopper.

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