JP2010029317A - Washing aid for endoscope, endoscope and washing method of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing aid for an endoscope capable of bringing a piston member and the peripheral edge part of an opening into contact in an airtight state over a long period of time, the endoscope and a washing method of the endoscope. <P>SOLUTION: For a valve mechanism having a cylinder member 71 which is provided on the hand operation part of the endoscope and provided with an opening hole 77 at least on a part of a sidewall surface and a piston member which is mounted on the cylinder member 71 so as to be freely inserted and removed and performs the flow path switching operation of a conduit communicated with the opening hole 77, the washing aid 100 of the endoscope is mounted on the cylinder 71 from which the piston member is detached and a brush guide path 87 for guiding a washing brush 33 is formed inside the conduit. When the washing aid 100 is mounted on the cylinder member 71, the exit hole 107 of the brush guide path faces the opening hole 77 of the cylinder member 71, and at least the edge part 107a of the mounting direction rear end of the exit hole 107 of the brush guide path is disposed in the inner side area of the opening hole 77 on the sidewall surface of the cylinder member 71. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an endoscope cleaning auxiliary tool and an endoscope having a cylinder member in which an opening hole is formed in a part of a side wall surface, and an endoscope cleaning method.

  The endoscope is provided with valves for fluid control such as an air supply / water supply valve for cleaning the observation window and a suction valve for sucking dirt from the body cavity. These valves are provided with a piston for opening / closing or switching the flow path in a cylinder connected to the flow path, and an operation button is connected to the piston. Normally, it is held in a non-actuated state by the return spring, and when the operator pushes the operation button, the piston switches to the predetermined switching position against the return spring to supply the cleaning fluid. Then, suction from the body cavity is performed (for example, see Patent Document 1).

FIG. 8 is a schematic configuration diagram of an endoscope provided with a conventional suction valve.
The suction mechanism has a suction flow path 7 that opens at the distal end of the insertion section 3 of the endoscope 1 and passes through the hand operation section 5, and a suction source device is detachably connected to the other end of the suction flow path 7. Configured to be. The hand operating section 5 is provided with a forceps port 11 for introducing the treatment instrument into the treatment instrument insertion channel 9. The end of the suction channel 7 passes through the inside of the universal cord 13 connected to the hand operating portion 5, and a connector that is detachably connected to the pipe from the suction source device is provided at the tip of the universal cord 13.

  In order to perform a suction operation, a suction valve 14 is attached to the hand operation unit 5 of the endoscope 1. As shown in the exploded perspective view of the conventional suction valve in FIG. 9, the suction valve 14 is mainly composed of a cylinder 15, a piston 17, and a suction button 19, and the cylinder 15 is fixed to the hand operation unit 5. The piston 17 is slidably inserted into the cylinder 15, and a suction button 19 is attached to the top of the piston 17.

  The suction valve 14 normally blocks the suction flow path 7 on the treatment instrument insertion channel side shown in FIG. 8, and opens the flow path 21 on the connection side to the suction source device with an opening 23, a notch 25, and a leak hole 27. When the suction button 19 is pushed in, the flow path 7 on the treatment instrument insertion channel side flows through the opening 23, the side surface communication hole 29, and the bottom surface opening hole 31 to the flow on the suction source device side. It is connected to the passage 21 and communication with the atmosphere is blocked. As a result, a negative pressure suction force acts in the treatment instrument insertion channel, and a fluid such as a body fluid and a fluid in the body cavity such as air are sucked from the body cavity.

  When a suction operation from the body cavity is performed by the endoscope 1, the entire suction channel is soiled by the fluid in the body cavity. This fouling extends not only to the treatment instrument insertion channel and the suction flow path, but also to the flow path formed inside the suction valve 14. For this reason, it is common practice to remove the contamination in the treatment instrument insertion channel and the suction flow path by flowing a cleaning liquid or the like inside. In addition, the inside of the suction valve 14 needs to be cleaned. For this purpose, the piston 17 is taken out from the cylinder 15 and the inside of the cylinder 15 and the piston 17 are cleaned with a cleaning brush 33 or the like as shown in FIG. Reference 2-5).

JP 2006-271790 A Japanese Unexamined Patent Publication No. 60-5120 Japanese Patent Laid-Open No. 10-328134 JP 2002-200031 A JP 2002-200032 A

Due to the development of endoscopic medicine and equipment, opportunities for medical treatment using an endoscope are increasing in the clinical field, and it is desired to extend the life and durability of the equipment. In addition, from the viewpoint of the operator's operation, it is required to realize a more stable and reliable operation.
By the way, the operability of the suction button 19 used in the hand operating unit 5 is reduced by repeated use, or the coiled wire portion 33a of the cleaning brush 33 cuts the peripheral portion 23a of the opening 23 by a cleaning process. , Airtightness may be insufficient. Therefore, there is a concern that a desired operation may not be performed even if the button is pressed. That is, as shown in FIG. 11, since the opening 23 leading to the suction source device is located on the side wall of the cylinder 15, the cleaning brush 33 moves from the upper opening of the cylinder 15 from which the piston 17 is removed to the opening 23. Inserted diagonally. When the cleaning brush 33 inserted obliquely is moved in the insertion / extraction direction during cleaning, the coiled wire portion 33a rubs the upper peripheral portion 23a of the opening 23 and wears the peripheral portion 23a. When the peripheral edge portion 23a is worn, it originally leads to the opening 23, the wear gap 35, the side surface communication hole 29, and the bottom surface opening hole 31 in addition to the flow path A that is open to the atmosphere through the opening 23, the notch 25, and the leak hole 27. The flow path B is formed. When the flow path B is formed, unintended intake may be performed from the distal end of the insertion portion 3 even if the suction operation by pressing the suction button 19 is not performed.
The present invention has been made in view of the above situation, and an object of the present invention is to provide an endoscope cleaning aid and an endoscope that can bring the piston member and the peripheral edge of the opening into contact with each other in an airtight state for a long period of time. An object of the present invention is to provide a method for cleaning an endoscope.

The present invention has the following configuration.
(1) A cylinder member provided in the hand operation portion of the endoscope and having an opening hole in at least a part of the side wall surface, and a flow path switching operation of a pipe line that is detachably attached to the cylinder member and communicates with the opening hole A cleaning assisting tool for an endoscope in which a brush guide path for guiding a cleaning brush is formed in the pipe line, which is mounted on the cylinder member from which the piston member has been removed. Because
When the cleaning auxiliary tool is positioned and mounted on the cylinder member so that the outlet hole of the brush guide path faces the opening hole of the cylinder member, at least the cleaning auxiliary tool of the outlet hole of the brush guide path is An endoscope cleaning aid in which a rear end edge in the mounting direction to be mounted on the cylinder member is disposed in an inner region of the opening hole on the side wall surface of the cylinder member.

  According to this endoscope cleaning auxiliary tool, when the cleaning auxiliary tool is inserted into the cylinder member from which the piston member has been removed in the same direction as the mounting direction of the piston member, after the mounting direction of the outlet hole of the brush guide path, The edge of the end is arranged in the inner region of the opening hole of the cylinder member on the side wall surface of the cylinder member when viewed from the vertical direction of the insertion direction, and the opening hole of the cylinder member is the edge of the outlet hole of the brush guide path Even if the cleaning brush is inserted, the coiled wire portion of the cleaning brush does not contact the edge of the opening hole.

(2) The endoscope cleaning aid of (1),
When the cleaning aid is mounted on the cylinder member, the edge of the outlet direction tip of the brush guide path in the mounting direction is disposed in the inner region of the opening hole on the side wall surface of the cylinder member. Mirror cleaning aid.

  According to the cleaning aid of this endoscope, when the cleaning aid is inserted into the cylinder member from which the piston member has been removed in the same direction as the mounting direction of the piston member, the tip of the brush guide passage outlet hole in the mounting direction The edge of the cylinder member is disposed in the inner side area of the opening hole of the cylinder member on the side wall surface of the cylinder member, and the opening hole of the cylinder member is located outside the edge of the outlet hole of the brush guide path so that the cleaning brush can be inserted. The coiled wire portion of the cleaning brush does not come into contact with both edge portions of the rear end and front end of the opening hole in the mounting direction, and damage to the edge portion can be prevented more reliably.

(3) The endoscope cleaning aid of (1) or (2),
An endoscope cleaning aid having a linear index perpendicular to the mounting direction at a predetermined interval from the rear end in the mounting direction of the outlet hole of the brush guide path.

  According to the cleaning aid of this endoscope, if the indicator is provided slightly in front of the rear end of the outlet hole of the brush guide path, the indicator can be used as an indicator for replacing the cleaning aid. That is, when the edge of the outlet hole of the brush guide path is scraped by the cleaning brush and reaches the position of the index, the cleaning auxiliary tool is replaced to prevent damage to the edge of the opening of the cylinder member. it can. In addition, if this index is provided on the front side of a predetermined distance from the rear end of the outlet hole of the brush guide path, it can be used as a mark for the position of attaching the cleaning aid, without fixing the cleaning aid (completely attached), The cleaning operation of a large number of cleaning aids can be performed with good workability at the insertion position where it can be easily removed.

(4) An endoscope cleaning aid according to any one of (1) to (3),
An endoscope cleaning aid in which the brush guide path is formed at a plurality of locations to guide the cleaning brush to different cleaning sites.

  According to the cleaning aid for an endoscope, the above-described effect that is exhibited is remarkable in a configuration in which a plurality of brush guide paths are formed. That is, when inserting the cleaning brush into the pipe line through the opening hole formed in the cylinder wall surface, it is conceivable to form the brush guide path with a gentle slope to avoid bending the insertion direction sharply, When there are brush guide paths at a plurality of locations, it is difficult to form them obliquely because the space is limited. For this reason, formation of a brush guide path that bends sharply is forced, and it is unavoidable that the cleaning brush hits the edge of the opening hole in the cylinder wall surface when cleaning the pipe line. By doing so, it is possible to reliably prevent damage to the edge of the opening hole.

(5) The cleaning aid for the endoscope according to any one of (1) to (4);
An endoscope having a cylinder member to which the cleaning aid is mounted,
A flange is formed on the top of the cylinder member, and the cleaning aid has a flat portion that abuts on the flange,
An endoscope in which the cleaning assisting tool is inserted into the cylinder member, and the position where the flat portion comes into contact with the flange is the mounting position of the cleaning assisting tool.

  According to this endoscope, when the cleaning assisting tool is mounted, the position of the cleaning assisting tool is regulated by contacting the flat surface portion of the cleaning assisting tool to the flange of the cylinder member, and the mounting position of the cleaning assisting tool is set reliably and accurately.

(6) The endoscope according to (5),
A side surface of the cleaning aid that is inserted into the cylinder member and an inner peripheral surface of the cylinder member are formed by a protrusion formed in parallel with the mounting direction of the cleaning auxiliary tool and an engagement groove that engages the protrusion. Endoscope positioned in the circumferential direction.

  According to this endoscope, when the cleaning aid is inserted into the cylinder member, the relative rotation of both members is restricted by the protrusions and the engagement grooves provided across both members, and the brush guide path and the opening hole rotate. Accurately positioned in the direction.

(7) A cylinder member provided in the hand operation portion of the endoscope and having an opening hole in at least a part of the side wall surface, and a flow path switching operation of a conduit that is detachably attached to the cylinder member and communicates with the opening hole An endoscope cleaning method for cleaning the inside of the pipe line using a cleaning brush with respect to a valve mechanism having a piston member for performing
A cleaning auxiliary tool in which a brush guide path for guiding a cleaning brush is formed in the pipe is inserted into the cylinder member from which the piston member has been removed,
The outlet hole of the brush guide path faces the opening hole of the cylinder member, and at least the edge of the rear end in the mounting direction of the outlet hole of the brush guide path is in the inner region of the opening hole on the side wall surface of the cylinder member. Positioning and mounting the cleaning aid to the cylinder member so as to be arranged,
An endoscope cleaning method in which a cleaning brush is inserted into a brush guide path of the cleaning aid to clean the inside of the pipe.

  According to this endoscope cleaning method, the opening hole of the cylinder member is protected by the edge of the outlet hole of the brush guide path of the inserted cleaning aid, and the coil of the cleaning brush is used during the cleaning operation of inserting the cleaning brush. It is possible to perform cleaning without bringing the wire portion into contact with the edge of the opening hole.

(8) The endoscope cleaning method according to (7),
The outlet hole of the brush guide path faces the opening hole of the cylinder member, and at least the edge of the rear end in the mounting direction of the outlet hole of the brush guide path is disposed in the inner region of the opening hole of the cylinder member. Insert the position
Obtained from a linear index perpendicular to the mounting direction provided at a predetermined interval from the mounting direction rear end of the outlet hole of the brush guide path,
An endoscope cleaning method in which the inside of the duct is cleaned with the cleaning brush at an appropriate insertion position of the linear assisting tool obtained by the linear index.

  According to this endoscope cleaning method, the cleaning guide is inserted into the cylinder member using the index as a guideline, so that the edge of the rear end in the mounting direction of the brush guide path can be obtained without fixing (completely mounting) the cleaning support. The portion becomes an appropriate position in the inner region of the opening hole, and the cleaning operation can be performed with high workability at the insertion position where the insertion position index is easily removed. Thereby, many endoscopes can be cleaned with good workability.

  According to the endoscope cleaning aid according to the present invention, when mounted on the cylinder member, the edge of the outlet hole of the brush guide path is disposed in the inner region of the opening hole on the side wall surface of the cylinder member. The opening hole of the cylinder member is protected by the edge of the outlet hole of the brush guide path, and the edge of the opening hole is not damaged by the cleaning brush when the cleaning brush is inserted to perform the cleaning operation. Accordingly, the piston member and the peripheral edge of the opening can be brought into contact with each other in an airtight state for a long period of time, and for example, the intake valve operation can be normally maintained.

  According to the endoscope of the present invention, the mounting position of the cleaning aid can be regulated by abutting the flat portion of the cleaning aid against the flange of the cylinder member. Positioning can be performed reliably and accurately in the inner region of the member opening hole.

  According to the endoscope cleaning method of the present invention, the cleaning auxiliary tool in which the brush guide path is formed is inserted into the cylinder member, and the edge of the outlet hole of the brush guide path is disposed in the inner region of the cylinder member opening hole. After the positioning, the cleaning brush is inserted into the brush guide path and the inside of the pipe is cleaned. Therefore, the opening hole of the cylinder member can be protected by the edge of the outlet hole of the brush guide path, and the cleaning brush is inserted. In operation, damage to the edge of the opening hole due to the coiled wire portion of the cleaning brush can be reliably prevented.

Hereinafter, preferred embodiments of an endoscope cleaning auxiliary tool, an endoscope, and an endoscope cleaning method will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a cleaning aid and an endoscope using the same.
Prior to the description of the cleaning aid 100 according to the present embodiment, an endoscope 200 that performs cleaning using the cleaning aid 100 will be described. An insertion portion 43 to be inserted into a body cavity is connected to the hand operation portion 41 of the endoscope 200, and a distal end hard portion 47 is provided at the distal end of the insertion portion 43 via a bending portion 45. The bending portion 45 is bent by turning a pair of angle knobs 48 and 49 provided in the hand operation portion 41.

  An observation window (objective lens), an irradiation window, an air / water supply nozzle, and a forceps channel (not shown) are formed on the end face of the distal end hard portion 47, and a solid-state image sensor is provided inside the observation window. The hand operation unit 41 is provided with a suction button 51 and an air / water supply button 53 in parallel, and a shutter button 55. By pressing the shutter button 55, a still image or hard copy of the observation image is performed.

  The air / water feed button 53 is detachably attached to the casing 61, and by pressing the air / water feed button 53, cleaning liquid or air is ejected from the air / water feed nozzle of the hard tip portion 47.

  1 is a forceps hole into which a treatment tool such as forceps is inserted, and a forceps plug (not shown) is detachably attached to the forceps hole 63. In addition, reference numeral 65 in FIG. 1 is a universal code, and the illumination light from the light source device is transmitted to the illumination window of the distal end hard portion 47 by connecting the distal end of the LG flexible portion 65 to a light source device (not shown). The

  The suction button 51 is fixed to the upper end portion of the piston member 67 and supported so as to be slidable in the vertical direction with respect to the knob member 69. A spring (not shown) is provided between the suction button 51 and the knob member 69, and the suction button 51 is urged upward with respect to the knob member 69.

  The suction valve 72 including the suction button 51, the piston member 67, and the knob member 69 is configured to be detachable from the cylinder member 71. When this button unit is attached to the cylinder member 71, the knob member 69 is fitted and fixed to the cylinder member 71, and the piston member 67 is slidably supported by the cylinder member 71. Accordingly, when the suction button 51 is pressed, the suction button 51 and the piston member 67 slide relative to the cylinder member 71 and the knob member 69.

FIG. 2 is a cross-sectional view of a cylinder member provided in the hand operation unit shown in FIG.
A bottom opening hole 73 is formed at the lower end of the cylinder member 71, and the suction channel 7 (see FIG. 8) is connected to the bottom opening hole 73 via a suction pipe 75. The suction tube 75 is inserted through the insertion portion 43 shown in FIG. 1 and connected to the forceps channel of the distal end hard portion 47. An opening hole 77 is formed in the side surface of the cylinder member 71, and a suction pipe 79 is connected to the opening hole 77, so that the suction side flow path (negative pressure generation flow path) 21 (see FIG. 8) and Connected. The suction tube 79 is inserted into the LG flexible portion 65 of FIG. 1 and connected to a suction device (not shown).

  An engagement groove 81 is formed in the axial direction on the inner peripheral surface of the cylinder member 71, and the engagement groove 81 engages with a positioning pin 83 (see FIG. 11) protruding from the outer peripheral surface of the piston member 67. Thereby, rotation of the piston member 67 in the circumferential direction is prevented.

  The suction valve 72 is switched by the piston member 67 sliding so that the opening hole 77 of the cylinder member 71 communicates with one of the flow paths of the piston member 67. The opening 77 of the cylinder member 71 is connected to the negative pressure generation flow path 21, and one end (the upper end in FIG. 2) of the cylinder member 71 is communicated with the atmosphere. The other end (lower end in FIG. 2) of the cylinder member 71 is connected to a suction flow path 7 extending to the distal end of the insertion portion. That is, the piston member 67 constitutes a valve mechanism that switches and connects the negative pressure generating flow channel 21 to either the atmosphere or the suction flow channel 7.

  As described above, the entire suction channel of the endoscope 200 is fouled by the fluid in the body cavity. This fouling extends not only to the treatment instrument insertion channel and the suction flow path but also to the flow path formed inside the suction valve 72 and the cylinder member 71. For this reason, the piston member 67 is taken out from the cylinder member 71 and the inside of the cylinder member 71 is cleaned by the cleaning brush 33 (see FIG. 6). Further, the removed piston member 67 is also cleaned.

Here, when the pipe line communicating with the cylinder member 71 (and the piston member 67) is cleaned with a cleaning brush, a cleaning auxiliary tool is attached to the cylinder member 71.
FIG. 3 is an external view of the cleaning aid shown in FIG. 1 as viewed from the side of the brush guide path (a), and a side view as viewed from the back side is represented by (b). FIG. It is P sectional drawing.
The cleaning aid 100 according to the present embodiment is attached to the cylinder member 71 from which the piston member 67 has been removed when the cylinder member 71 is cleaned by the cleaning brush 33. A plurality of (two in the present embodiment) brush guide paths 85 and 87 are formed in the cleaning aid 100. The linear brush guide path 85 guides the cleaning brush 33 to the suction flow path 7 (see FIG. 8). A bent brush guide path 87, which will be described in detail later, guides the cleaning brush 33 to the negative pressure generating flow path 21 (see FIG. 8) which is a pipe line communicating with the opening hole 77.

  The cleaning auxiliary tool 100 includes a cylindrical small-diameter portion 89 and a large-diameter portion 91 that are coaxially connected from the insertion tip side. A cylindrical rubber cap 93 is fitted on the outer periphery of the large-diameter portion 91, and the rubber cap 93 has a claw portion 95 and an inner peripheral groove 99 that fits the flange 97 of the cylinder member 71 on the lower inner periphery.

  In the brush guide path 85, the brush guide path inlet hole 101 opens on the upper surface of the large diameter portion 91, and the brush guide path outlet hole 103 opens on the tip surface of the small diameter portion 89. On the other hand, in the brush guide path 87, the brush guide path inlet hole 105 opens similarly to the upper surface of the large diameter portion 91, but the brush guide path outlet hole 107 opens on the side surface of the small diameter portion 89.

  In the endoscope 200 in which the cleaning aid 100 is used, a flange 97 is formed on the top of the cylinder member 71. On the other hand, in the cleaning aid 100, a flat surface portion 109 that abuts on the flange 97 is formed on the lower surface of the large diameter portion 91. The position where the small diameter portion 89 of the cleaning aid 100 is inserted into the cylinder member 71 and the flat portion 109 abuts on the flange 97 is the normal mounting position of the cleaning aid 100. The cleaning aid 100 inserts the small-diameter portion 89 into the cylinder member 71 and presses the rubber cap 93 against the flange 97, so that the lower portion of the rubber cap 93 expands due to elastic deformation, and the flange 97 that has entered the flat portion 109 And is fitted into the inner circumferential groove 99. At the same time, the claw portion 95 is engaged with the lower surface of the flange 97, so that the cleaning aid 100 is held, and the cleaning aid 100 can be mounted stably and accurately.

  Further, the cleaning aid 100 has a circumferential direction by a projection 111 in which the side surface of the insertion portion and the inner circumferential surface of the cylinder member 71 are formed in parallel with the mounting direction, and an engagement groove 81 that engages with the projection 111. It is designed to be positioned. When the cleaning aid 100 is inserted into the cylinder member 71, the protrusion 111 and the engagement groove 81 restrict relative rotation of both members and accurately position the brush guide path outlet hole 107 and the opening hole 77 in the rotation direction. . One of the protrusion 111 and the engagement groove 81 may be provided on the small diameter portion 89 and the other on the cylinder member 71. In the present embodiment, the engaging groove 81 that engages the positioning pin 83 (see FIG. 11) of the piston member 67 is configured to be shared as the rotation stopping means of the cleaning aid 100.

Next, how the cleaning aid is inserted into the cylinder member 71 will be described with reference to FIG.
FIG. 5 is a cross-sectional view of the cylinder member in which the cleaning aid is being inserted (a) and the mounted state is shown in (b).
In order to clean the inside of the pipeline using the cleaning brush 33 with respect to the valve mechanism of the endoscope 200, first, as shown in FIG. The member 67 is inserted into the removed cylinder member 71. When the small diameter portion 89 is inserted, the claw portion 95 of the rubber cap 93 comes into contact with the flange 97. When the large-diameter portion 91 is further pressed in this state, the claw portion 95 is once expanded in diameter, and after the flange 97 is fitted into the inner peripheral groove 99, it is locked to the lower surface of the flange 97. In this state, the position where the flat portion 109 abuts on the flange 97 is the mounting position of the cleaning aid 100.

  When the claw portion 95 is engaged with the lower surface of the flange 97 and the cleaning aid 100 is held by the cylinder member 71, the brush guide path is formed in the opening hole 77 of the cylinder member 71 as shown in FIG. The outlet hole 107 faces, at least the edge 107a at the rear end in the mounting direction of the brush guide path outlet hole 107 is disposed in the inner region S of the opening hole 77 of the cylinder member 71, and the cleaning aid 100 is positioned on the cylinder member 71. It will be in the state of wearing.

  FIG. 6 is a cross-sectional view of the cylinder member showing a state of cleaning the opening hole by the cleaning aid. In this state, the cleaning brush 33 is inserted into the brush guide path 87 of the cleaning auxiliary tool 100 to clean the inside of the pipe line. Similarly, the cleaning brush 33 is inserted into the brush guide path 85 to clean the inside of the pipe.

  When cleaning the inside of the pipe line (negative pressure generating flow path 21) by the cleaning brush 33 inserted in the brush guide path 87, the opening hole 77 of the cylinder member 71 is protected by the edge portions 107a and 107b of the brush guide path outlet hole 107. In addition, it is possible to perform cleaning without bringing the coiled wire portion 33 a into contact with the edge portions 77 a and 77 b of the opening hole 77.

  That is, when the cleaning aid 100 is mounted on the cylinder member 71, the brush guide path outlet hole 107 faces the opening hole 77 of the cylinder member 71, and at least the edge of the brush guide path outlet hole 107 at the rear end in the mounting direction. 107a is arranged to protrude from the edge 77a at the rear end in the mounting direction of the opening hole 77 of the cylinder member 71 to the front side in the mounting direction. That is, at least the rear edge 107 a of the brush guide path outlet hole 107 in the mounting direction in which the cleaning aid 100 is mounted on the cylinder member 71 is disposed in the inner region of the opening hole 77 on the side wall surface of the cylinder member 71. It is like that. Thus, even when the cleaning brush 33 is inserted, the edge 77a of the coil-shaped wire portion 33a at the rear end in the mounting direction of the opening 77 is covered with the edge 107a and does not come into contact with the edge 77a. Therefore, even if the cleaning brush 33 is reciprocated, the coiled wire portion 33a does not contact the edge 77a of the cylinder member 71, and wear occurs on the cleaning auxiliary portion 100 side.

  In addition, as described above, the cleaning assisting tool 100 has the brush guide paths 85 and 87 formed in two places so that the cleaning brush 33 can be guided to different cleaning sites. In particular, in the configuration of the cleaning aid 100 in which the plurality of brush guide paths 85 and 87 are formed, the above effect is remarkably exhibited. That is, when inserting the cleaning brush 33 into the opening hole 77 formed in the inner wall surface of the cylinder member 71, it is conceivable that the brush guide path is formed with a gentle inclination in order to avoid bending the insertion direction sharply. (For example, refer to Patent Document 3) However, when there are brush guide paths at a plurality of locations, it is difficult to form the brush guide paths diagonally because space is limited. For this reason, formation of a brush guide path that bends sharply is forced, and it is inevitable that the cleaning brush 33 comes into contact with the edge 77a of the opening hole 77 in a state of being strongly pressed. However, according to this cleaning aid 100, the opening hole edge 77a can be reliably prevented from being damaged by the above configuration.

  When the cleaning aid 100 is mounted on the cylinder member 71, the edge 107 b (see FIG. 5) at the tip of the brush guide path outlet hole 107 in the mounting direction is located in the inner region S of the opening hole 77 of the cylinder member 71. More preferably, it is arranged. In this case, when the cleaning assisting tool 100 is inserted into the cylinder member 71 from which the piston member 67 has been removed in the same direction as the mounting direction of the piston member 67, the edge 107b at the tip of the mounting direction of the brush guide path outlet hole 107 is formed. These are disposed in the inner region S of the cylinder member opening hole 77, and the opening hole 77 is located outside the edge portion 107b. As a result, even if the cleaning brush 33 is inserted, the coiled wire portion 33a does not come into contact with both the edge portions 77a and 77b at the rear end and the front end in the mounting direction of the opening hole 77, and the edges 77a and 77b are more reliably damaged. Can be prevented.

  Further, the cleaning assisting tool 100 is provided with a linear index 115 orthogonal to the mounting direction at a predetermined interval from the edge 107a at the rear end of the brush guide path outlet hole 107 in the mounting direction. If the index 115 is an index 115A (see FIG. 3) provided slightly in front of the rear end of the brush guide path outlet hole 107, the index 115A can be used as an index for replacing the cleaning aid 100. That is, when the edge 107a of the brush guide passage outlet hole 107 is scraped by the cleaning aid 100 and reaches the position of the index 115A, the edge of the opening hole 77 of the cylinder member 71 is replaced by replacing the cleaning aid 100. Damage to the portion 77a can be prevented in advance.

Further, the index 115 can be used as an index for mounting position alignment as well as an index for determining the replacement time.
FIG. 7 is a cross-sectional view of the cylinder member in which the cleaning auxiliary tool provided with the index is shown in the middle of insertion (a) and the proper insertion position is shown in (b).
As a cleaning method using the cleaning auxiliary tool 100, the brush guide path outlet hole 107 faces the opening hole 77 of the cylinder member 71, and at least the edge portion 107 a at the rear end in the mounting direction of the brush guide path outlet hole 107 is the cylinder member 71. The appropriate insertion position arranged in the inner region S of the opening hole 77 is obtained from an index 115B provided at a predetermined interval from the rear end in the mounting direction of the brush guide path outlet hole 107, and the linear shape obtained from the index 115B. It is good also as what wash | cleans the inside of a pipe line with the washing | cleaning brush 33 in the appropriate insertion position of 100 A of auxiliary tools.

Thus, if the index 115 is the index 115B provided at a predetermined distance from the rear end of the brush guide path outlet hole 107, it can be used as a mark of the cleaning assisting device mounting position, and the cleaning assisting tool 100 is fixed (FIG. 5 ( The cleaning operation of a large number of cleaning aids 100 can be performed with good workability at the insertion position where it can be easily removed without fully mounting to the position shown in b).
According to the cleaning method using the cleaning assisting tool 100A with the index 115B, the cleaning assisting tool 100A is inserted into the cylinder member 71 with the index 115B as a guide, as shown in FIG. Even if the tool 100A is not fixed (completely mounted), the edge 107a at the rear end in the mounting direction of the brush guide path outlet hole 107 becomes an appropriate position in the inner region S of the opening hole 77, and the insertion position index 115B is placed on the surface of the flange 97. The cleaning operation can be performed with high workability at the halfway insertion position for easy alignment. Thereby, many endoscopes 200 can be efficiently cleaned with good workability.

  According to the cleaning aid 100 of the endoscope 200 configured as described above, at least the edge portion 107 a of the brush guide path outlet hole 107 is disposed in the inner region S of the cylinder member opening hole 77 when mounted on the cylinder member 71. Therefore, the opening hole 77 is protected by the edge 107 a of the brush guide path outlet hole 107. As a result, when the cleaning brush 33 is inserted to perform the cleaning operation, the cleaning brush 33 does not damage the edge 77a of the opening hole 77. Thereby, the piston member 67 and the peripheral portion 23a (see FIG. 11) of the opening hole 77 can be brought into contact with each other in an airtight state over a long period of time, and the intake valve operation can be normally maintained.

  Further, according to the endoscope 200, the mounting position of the cleaning assisting tool 100 can be regulated by contacting the flat portion 109 of the cleaning assisting tool 100 with the flange 97 of the cylinder member 71. The edge 107a can be positioned reliably and accurately in the inner region S of the cylinder member opening hole 77.

  Furthermore, according to the cleaning method of the endoscope 200, the cleaning auxiliary tool 100 in which the brush guide path outlet hole 107 is formed is inserted into the cylinder member 71, and the edge 107a of the brush guide path outlet hole 107 is the cylinder member opening hole. 77, the cleaning brush 33 is inserted into the brush guide path 87 and the inside of the pipe is cleaned. Therefore, the opening of the cylinder member 71 is opened by the edge 107a of the brush guide path outlet hole 107. The hole 77 can be protected, and the opening hole edge 77 a can be reliably prevented from being damaged by the coiled wire portion 33 a of the cleaning brush 33 during the cleaning operation for inserting the cleaning brush 33.

It is a schematic block diagram of a cleaning auxiliary tool and an endoscope using the same. It is sectional drawing of the cylinder member provided in the hand operation part shown in FIG. It is the external view which represented the side view which looked at the washing | cleaning auxiliary tool shown in FIG. 1 from the brush guide way side, (a) and represented the side view which looked at the back side with (b). It is PP sectional drawing of FIG. It is sectional drawing of the cylinder member which represented (a) and the mounting state in (b) during the insertion of the cleaning auxiliary tool. It is sectional drawing of the cylinder member showing the washing | cleaning condition of the pipe line by a cleaning auxiliary tool. It is sectional drawing of the cylinder member which represented the insertion position in the middle of the insertion of the cleaning assistance tool provided with the parameter | index with (a), and the appropriate insertion position with (b). It is a schematic block diagram of the endoscope provided with the conventional suction valve. It is a disassembled perspective view of the conventional suction valve. It is sectional drawing showing the washing | cleaning condition of the conventional pipe line. It is sectional drawing showing the leak flow path which generate | occur | produces by abrasion in the conventional suction valve.

Explanation of symbols

21 Negative pressure generation flow path (pipe)
33 Cleaning brush 41 Hand operating part 67 Piston member 71 Cylinder member 77 Opening hole 81 Engagement groove 85, 87 Brush guideway 97 Flange 100, 100A Endoscope cleaning hole 107 Brush guideway outlet hole 107a Edge 107b Edge 109 at the tip in the mounting direction Flat part 111 Projection 115 Linear index 200 Endoscope S Inner region

Claims (8)

A cylinder member provided in a hand operation portion of the endoscope and having an opening hole in at least a part of a side wall surface, and a piston that is detachably attached to the cylinder member and performs a flow path switching operation of a pipe line that communicates with the opening hole. An endoscope cleaning assisting tool that is mounted on the cylinder member from which the piston member has been removed and a brush guide path for guiding a cleaning brush is formed in the conduit. ,
When the cleaning auxiliary tool is positioned and mounted on the cylinder member so that the outlet hole of the brush guide path faces the opening hole of the cylinder member, at least the cleaning auxiliary tool of the outlet hole of the brush guide path is An endoscope cleaning aid in which a rear end edge in the mounting direction to be mounted on the cylinder member is disposed in an inner region of the opening hole on the side wall surface of the cylinder member. An endoscope cleaning aid according to claim 1,
When the cleaning aid is mounted on the cylinder member, the edge of the outlet direction tip of the brush guide path in the mounting direction is disposed in the inner region of the opening hole on the side wall surface of the cylinder member. Mirror cleaning aid. An endoscope cleaning aid according to claim 1 or claim 2,
An endoscope cleaning aid having a linear index perpendicular to the mounting direction at a predetermined interval from the rear end in the mounting direction of the outlet hole of the brush guide path. An endoscope cleaning aid according to any one of claims 1 to 3,
An endoscope cleaning aid in which the brush guide path is formed at a plurality of locations to guide the cleaning brush to different cleaning sites. An endoscope cleaning aid according to any one of claims 1 to 4,
An endoscope having a cylinder member to which the cleaning aid is mounted,
A flange is formed on the top of the cylinder member, and the cleaning aid has a flat portion that abuts on the flange,
An endoscope in which the cleaning assisting tool is inserted into the cylinder member, and the position where the flat portion comes into contact with the flange is the mounting position of the cleaning assisting tool. The endoscope according to claim 5, wherein
A side surface of the cleaning aid that is inserted into the cylinder member and an inner peripheral surface of the cylinder member are formed by a protrusion formed in parallel with the mounting direction of the cleaning auxiliary tool and an engagement groove that engages the protrusion. Endoscope positioned in the circumferential direction. A cylinder member provided in a hand operation portion of the endoscope and having an opening hole in at least a part of a side wall surface, and a piston that is detachably attached to the cylinder member and performs a flow path switching operation of a pipe line that communicates with the opening hole. An endoscope cleaning method for cleaning the inside of the pipe line using a cleaning brush with respect to a valve mechanism having a member,
A cleaning auxiliary tool in which a brush guide path for guiding a cleaning brush is formed in the pipe is inserted into the cylinder member from which the piston member has been removed,
The outlet hole of the brush guide path faces the opening hole of the cylinder member, and at least the edge of the rear end in the mounting direction of the outlet hole of the brush guide path is in the inner region of the opening hole on the side wall surface of the cylinder member. Positioning and mounting the cleaning aid to the cylinder member so as to be arranged,
An endoscope cleaning method in which a cleaning brush is inserted into a brush guide path of the cleaning aid to clean the inside of the pipe. An endoscope cleaning method according to claim 7,
The outlet hole of the brush guide path faces the opening hole of the cylinder member, and at least the edge of the rear end in the mounting direction of the outlet hole of the brush guide path is disposed in the inner region of the opening hole of the cylinder member. Insert the position
Obtained from a linear index perpendicular to the mounting direction provided at a predetermined interval from the mounting direction rear end of the outlet hole of the brush guide path,
An endoscope cleaning method in which the inside of the duct is cleaned with the cleaning brush at an appropriate insertion position of the linear assisting tool obtained by the linear index.

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