JP2009254936A - Guide tube for discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide tube for a discharge device which can extract a cartridge from a tube body without removing a plunger from the tube body. <P>SOLUTION: An escape part 24 is formed on the internal circumferential surface, at an apex, of the tube body 21. The escape part 24 is set to a length which allows the plunger 14 to find its way inside, when the plunger 14 is transferred toward the apex so far as the plunger 14 can reach a bottom 12 of a cartridge 1. The inside diameter of the escape part 24 is made slightly larger than the outside diameter of the apex of the tube part 11, into which the plunger 14 is fitted, or the outer circumferential surface, at the apex, of the tube part 11 is set to a size which allows the generation of a frictional resistance below a specified magnitude to the internal circumferential surface of the escape part 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a guide tube for a discharge device used when a flowable substance such as an adhesive or a caulking agent is discharged from a cartridge.

  In general, the cartridge containing the adhesive and the caulking agent is, as described in Patent Document 1 below, a cylindrical portion made of a film-like body such as a laminated film, and a bottom portion that closes the tip opening of the cylindrical portion, It has a plunger slidably provided on the inner peripheral surface of the base end portion of the cylindrical portion, and fluid substances such as an adhesive and a caulking agent are accommodated in the cylindrical portion between the bottom portion and the plunger.

  When the fluid substance is discharged from the cartridge having the above-described configuration, the plunger is moved to the front end side of the cartridge by a piston of a discharge device such as a discharge gun. Then, the fluid substance in the cartridge is pushed to the tip side by the plunger, and is discharged to the outside from the discharge port formed at the bottom. At this time, since the cylindrical portion is composed of a flexible film-like body, when the plunger moves inside the cylindrical portion toward the distal end side, the diameter of the portion corresponding to the plunger of the cylindrical portion increases. As a result, the fluid substance leaks from between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the plunger.

  Therefore, a guide cylinder is used when a fluid substance is discharged from the cartridge. The guide cylinder has a predetermined rigidity, and a cartridge is inserted into the guide cylinder. The inner diameter of the guide cylinder is set to a size such that the outer peripheral surface of the plunger is in press contact with the inner peripheral surface of the guide cylinder via the cylinder portion. Therefore, the diameter of the cylindrical portion is not increased by the plunger. Therefore, it is possible to prevent a situation in which the fluid substance leaks from between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the plunger.

  When the plunger moves toward the front end side of the cartridge to a predetermined position and as a result, the discharge of the fluid substance in the cartridge is completed, the cartridge is pulled out from the front end opening of the guide tube in order to discard the cartridge. However, in the conventional guide cylinder, the plunger is pressed against the guide cylinder via the cylinder portion, and a great frictional resistance is generated between the inner peripheral surface of the guide cylinder and the outer peripheral surface of the cylinder portion. . For this reason, it is almost impossible to manually remove the cartridge from the guide tube. Therefore, the plunger is moved further forward by the piston of the discharge device to escape from the guide tube. Thereafter, the cartridge is manually pulled out from the guide tube.

See JP 2007-297119 A

  However, when the plunger is pushed out of the guide tube by the piston, the moving distance of the piston must be increased by at least the length of the plunger, and the discharge gun becomes larger by that amount. It was. Further, when the cartridge is extracted from the guide tube, the piston enters the inside of the guide tube. For this reason, there is a problem that the piston becomes an obstacle when the cartridge is pulled out from the guide tube.

  In order to solve the above problems, the present invention provides a cylindrical portion made of a flexible film-like body, a bottom portion provided at the distal end portion of the cylindrical portion, and an inner peripheral surface of the proximal end portion of the cylindrical portion on the distal end side A plunger provided to be slidable, and moving the plunger of a cartridge containing a fluid substance in the cylinder part between the bottom part and the plunger to the tip side of the cylinder part, The fluid substance is used when discharging from a discharge port provided at the bottom, and has a cylinder main body into which the cartridge is inserted, and the plunger is disposed on the inner peripheral surface of the cylinder main body via the cylinder portion. In the guide cylinder for the discharge device that is movably pressed and contacted, the inner peripheral surface of the front end portion of the cylinder main body extends from the front end surface to the rear end side with a predetermined length, and the plunger faces the front end side of the cylinder portion. The plunge When the plunger enters the escape hole, the frictional resistance generated between the inner peripheral surface of the escape hole and the outer peripheral surface of the cylindrical portion is less than a predetermined magnitude. As described above, the inside diameter of the escape hole is set.

  According to the present invention having the above-described characteristic configuration, when the cartridge enters the escape hole, the frictional resistance acting between the inner peripheral surface of the escape hole and the outer peripheral surface of the cylindrical portion becomes a predetermined size or less, and the cartridge Can be manually pulled out of the guide tube. Therefore, it is not necessary to lengthen the moving distance of the piston of the discharge device, and an increase in the size of the discharge device can be avoided. Further, when the plunger enters the escape hole, it is not necessary to move the plunger further forward. Therefore, the piston can be extracted backward from the cartridge and the guide cylinder before the cartridge is extracted from the guide cylinder. Therefore, the piston does not get in the way when the cartridge is extracted from the guide tube.

The best mode for carrying out the present invention will be described below with reference to the drawings.
First, a cartridge in which the ejection device guide cylinder according to the present invention is used will be described. As shown in FIGS. 5 to 8, the cartridge 1 has a cylinder portion 11. The cylindrical portion 11 is made of a flexible film-like body such as a single layer resin film or a laminated film in which a metal foil such as an aluminum foil is provided between a plurality of resin films, and has a circular cross section. . The diameter of the cylindrical portion 11 gradually decreases from the base end portion (right end portion in FIG. 5) toward the distal end portion. The cylinder portion 11 may be formed straight with a constant diameter. The cylinder part 11 can be manufactured, for example, by winding a film-like body and gluing or enveloping both ends thereof.

  A bottom portion 12 is provided at the distal end portion of the cylindrical portion 11. The bottom portion 12 is made of a hard resin and is formed in a circular shape with a predetermined rigidity. The bottom portion 12 is fitted and fixed to the inner peripheral surface of the distal end portion of the cylindrical portion 11, whereby the shape of the distal end portion of the cylindrical portion 11 is maintained in a circular shape. The bottom portion 12 may be fixed to the outer peripheral surface of the cylindrical portion 11. The bottom portion 12 can be fixed to the cylindrical portion 11 simultaneously with the molding, for example, by an insert molding method. A discharge port 12 a communicating with the inside of the cylinder portion 11 is formed at the center of the bottom portion 12. The opening on the cylinder 11 side of the discharge port 12a is closed by a seal member 15 made of a film-like body similar to the film-like body constituting the cylinder 11.

  A reinforcing cylinder part 13 is provided at the base end part of the cylinder part 11. The reinforcement cylinder part 13 consists of hard resin, and is formed in the cross-sectional circle with predetermined rigidity. The reinforcing cylinder portion 13 is fitted and fixed to the outer peripheral surface of the base end portion of the cylinder portion 11. Thereby, the shape of the base end part of the cylinder part 11 is maintained circular. The reinforcing cylinder portion 13 may be fixed to the inner peripheral surface of the cylinder portion 11. The reinforcement cylinder part 13 can be fixed to the cylinder part 11 simultaneously with the molding by, for example, an insert molding method.

  Two engaging convex portions 13 a are formed on the outer peripheral surface of the reinforcing cylinder portion 13. The two engaging convex portions 13a are arranged 180 degrees apart in the circumferential direction. One or three or more engaging convex portions 13a may be formed. A split groove 13 b is formed on the outer peripheral surface of the reinforcing cylinder portion 13. The split groove 13b serves as a base for bending or breaking the reinforcing cylinder part 13. When the outer peripheral surface of the reinforcing cylinder part 13 formed with the split groove 13b is pressed with a finger or the like, as shown in FIG. The reinforcing cylinder portion 13 is bent starting from the split groove 13b, and the entire reinforcing cylinder portion 13 has a small diameter.

  A plunger 14 is slidably provided on the inner peripheral surface of the cylindrical portion 11. The plunger 14 is made of a hard resin, and includes a sliding cylinder portion 14a and a pressing portion 14b provided integrally with a distal end portion (left end portion in FIG. 8) of the sliding cylinder portion 14a. . The sliding cylinder part 14a is slightly larger in diameter than the inner diameter of the base end part of the cylinder part 11, and is elastically slightly reduced in diameter to the inner peripheral surface of the base end part of the cylinder part 11 provided with the reinforcing cylinder part 13. It is slidably fitted. That is, the outer peripheral surface of the sliding cylinder part 14a is slidably pressed and contacted with the inner peripheral surface of the reinforcing cylinder part 13 via the cylinder part 11 by the elasticity of the sliding cylinder part 14a itself. The sliding cylinder part 14 a is prevented from coming off by a projection 13 c formed on the inner peripheral surface of the reinforcing cylinder part 13. The pressing part 14b has a disk shape and closes the tip opening of the sliding cylinder part 14a.

  Inside the cylinder part 11 located between the bottom part 12 and the plunger 14, fluid substances (not shown) such as an adhesive and a caulking agent are accommodated. The fluid substance is discharged from the discharge port 12a when the plunger 14 is moved to the tip side after the seal member 15 is broken.

  Next, an embodiment of a guide tube for a discharge device according to the present invention will be described with reference to FIGS. The guide cylinder 2 of this embodiment is used when discharging a fluid substance from the cartridge 1 having the above-described configuration, and has a cylinder main body 21. The cylinder main body 21 includes a main portion 21A that occupies most of the main body 21 and a rear end portion 21B that is fixed to the base end portion of the main portion 21A. Each of the main portion 21A and the rear end portion 21B is made of a hard resin, and is formed as a straight cylindrical body having a predetermined rigidity. The main portion 21A and the rear end portion 21B are fixed with their axes aligned. The cylinder main body 21 may be integrally formed as a whole.

  The inside of the cylinder main body 21 is arranged at the sliding part 22 arranged at the center part in the longitudinal direction of the cylinder main body 21, the receiving part 23 arranged at the base end part (right end part in FIG. 1), and the tip part. It is divided into an escape portion (escape hole) 24. The sliding portion 22, the receiving portion 23, and the escape portion 24 are arranged concentrically with each other.

  The sliding portion 22 occupies most of the inside of the cylinder main body 21 and extends straight with a constant inner diameter. The inner diameter of the sliding portion 22 is set to be the same as or slightly larger than the outer diameter of the base end portion of the cylindrical portion 11, that is, the maximum outer diameter of the cylindrical portion 11. Therefore, the cylindrical portion 11 and the bottom portion 12 of the cartridge 1 can be inserted into the sliding portion 22 without resistance. Moreover, when the plunger 14 moves into the sliding portion 22, the outer peripheral surface of the sliding cylindrical portion 14 a is pressed against the inner peripheral surface of the sliding portion 22 via the cylindrical portion 11 due to the elasticity of the sliding cylindrical portion 14 a itself. Will do.

  The size and shape of the receiving portion 23 are set so that the entire reinforcing cylindrical portion 13 excluding the engaging convex portion 13a can be received without resistance and almost without any gap.

  The escape portion 24 is formed as a straight hole extending from the distal end surface of the tube main body 21 toward the proximal end side. The length of the escape portion 24 is longer than the length of the plunger 14 and is set so that the plunger 14 enters the escape portion 24 when the plunger 14 moves to the predetermined limit position toward the distal end side of the cylindrical portion 11. Has been. Usually, the limit position is a predetermined position so that most of the fluid substance in the cartridge 1 is discharged, and in this embodiment, the limit position is a position where the plunger 14 abuts against the bottom 12. The inner diameter of the escape portion 24 can be arbitrarily determined as long as the condition that the cartridge can be manually pulled out from the distal end opening of the guide tube 2 when the plunger 14 enters the escape portion 24 is satisfied. Usually, the inner diameter of the escape portion 24 is determined as one of the following.

  That is, when the plunger 14 enters the escape portion 24, the distal end portion of the cylindrical portion 11 is expanded by the plunger 14, but the inner diameter of the escape portion 24 is outside the distal end portion of the expanded cylindrical portion 11. It is determined to be slightly larger than the diameter. When the inner diameter of the escape portion 24 is set in this way, when the plunger 14 enters the escape portion 24, there is a frictional resistance between the inner peripheral surface of the escape portion 24 and the outer peripheral surface of the cylindrical portion 11. It will virtually not work. Accordingly, the cartridge 1 can be extracted without resistance from the tip opening of the guide tube 2.

  Further, the inner diameter of the escape portion 24 is such that when the plunger 14 enters the escape portion 24, the outer peripheral surface of the plunger 14 is lightly pressed and contacted with the inner peripheral surface of the escape portion 24 via the cylindrical portion 11 by its own elasticity. Determined. In such a case, a frictional resistance is generated between the inner peripheral surface of the escape portion 24 and the outer peripheral surface of the cylindrical portion 11. The magnitude of this frictional resistance prevents the cartridge 1 from falling out of the front end opening of the guide tube 2 even if the guide tube 3 is oriented in the vertical direction so that the cartridge 1 can be manually pulled out of the guide tube 2. As far as possible, it is kept as small as possible. In other words, the inner diameter of the escape portion 24 is determined so that such frictional resistance is generated. When the inner diameter of the escape portion 24 is set in this way, the cartridge 1 is pulled out from the guide tube 2 against the frictional resistance between the inner peripheral surface of the escape portion 24 and the outer peripheral surface of the cylindrical portion 11. .

  Two engaging recesses 25 are formed on the base end surface of the tube main body 21 (base end surface of the rear end portion 21B). The two engaging recesses 25 are arranged 180 degrees apart in the circumferential direction. In addition, the engagement recess 25 is formed so that the engagement protrusion 13a of the reinforcing tube portion 13 can enter from the open portion on the rear end side. As shown in FIG. 3, the engaging convex portion 13 a can enter until it hits the bottom surface of the engaging concave portion 25, and when the engaging convex portion 13 a hits the bottom surface of the engaging concave portion 25, the cartridge 1 is further moved. It becomes impossible to move forward with respect to the guide tube 2. In addition, in a state where the engaging convex portion 13a hits the bottom surface of the engaging concave portion 25, the reinforcing tube portion 13 enters the receiving portion 23 of the guide tube 2 with almost no gap, and the front end surface of the bottom portion 12 (the left end in FIG. 3). Surface) is positioned on the same plane as the tip surface of the guide tube 2. The front end surface of the bottom portion 12 may be positioned slightly rearward from the front end surface of the guide tube 2 when the engaging convex portion 13 a hits the bottom surface of the engaging concave portion 25.

  Two operation recesses 26 are formed on the base end surface of the cylinder body 21. The two operation recesses 26 are arranged so as to face the split grooves 13b formed on the outer peripheral surface of the reinforcing cylinder portion 13 when the two engagement projections 13a enter the two engagement recesses 25, respectively. Yes. Therefore, by inserting a finger or the like from the operation recess 26, the outer peripheral surface of the reinforcing cylindrical portion 13 in which the split groove 13b is formed can be pressed inward in the radial direction. As shown in FIG. 13, the reinforcing cylindrical portion 13 is bent to have a small diameter starting from the split groove 13b, and each engaging convex portion 13a escapes from each engaging concave portion 25 to the inside in the radial direction of the guide tube 2. To do. That is, the engagement between the engagement convex portion 13a and the engagement concave portion 25 is released. As a result, the cartridge 1 can move to the front end side with respect to the guide tube 2.

  FIGS. 9 and 10 show a discharge gun (discharge device) 3 used when discharging a fluid substance from the cartridge 1 inserted into the guide cylinder 2. The discharge gun 3 has a gun body 31. The gun body 31 is provided with a lever 32 so as to be pivotable. When the lever 32 is pivoted in the direction of the arrow in FIG. 9, the rod 33 moves forward (moves to the left) by an amount corresponding to the pivot amount. It is supposed to be. When the lever can be freely rotated, the lever 32 is returned to its original position by a spring (not shown) provided between the gun body 31 and the lever 32. At this time, the backward movement of the rod 33 is blocked by the locking member 34. Therefore, the rod 33 can be moved forward by repeatedly rotating the lever 32 in the arrow direction. The advanced rod 33 can be moved back to the original position by moving the lower end of the locking member 34 forward against the urging force of the spring 35.

  A piston 36 is provided at the tip of the rod 33. The piston 36 has a disk shape, and its outer diameter is smaller than the diameter of the pressing portion 14b of the plunger 14 by a predetermined dimension. Therefore, the piston 36 can be inserted into the cartridge 1 from the rear end opening portion. When the piston 36 is inserted to a predetermined position, it abuts against the pressing portion 14b and pushes and moves the plunger 14 forward (see FIG. 11).

  The gun body 31 is provided with a holding portion 37. The holding part 37 has a substantially semicircular cross section, and is arranged in a state where its axis coincides with the axis of the rod 33 and the piston 36 and its open part faces upward. When the rod 33 is advanced, the piston 36 moves along the holding portion 37. The radius of curvature of the inner peripheral surface of the holding portion 37 is substantially the same as or slightly larger than the radius of the main portion 21A or the rear end portion 21B so that the lower half of the guide tube 2 can be accommodated almost without backlash. Is set to

  A stopper portion 38 is provided at the distal end portion of the holding portion 37. The stopper portion 38 has a substantially horseshoe shape, and the front end surface of the guide tube 2 is abutted in a state where a nozzle (not shown) screwed and fixed to the discharge port 12b is inserted. As a result, the guide tube 2 cannot move forward relative to the holding portion 37.

  Next, the case where a fluid substance is discharged from the cartridge 1 using the guide cylinder 2 and the discharge gun 3 having the above-described configuration will be described. As shown in FIG. 3, first, the cartridge 1 is inserted into the guide tube 2 from its proximal end. Then, the engaging convex portion 13 a is abutted against the bottom surface of the engaging concave portion 25. Thereafter, the seal member 15 is broken, and the nozzle is screwed and fixed to the discharge port 12a.

  Next, the guide tube 2 is placed on the holding portion 37 of the discharge gun 3. Of course, the nozzle is inserted into the stopper portion 38, and the front end surface of the guide tube 2 is abutted against the stopper portion 38. Thereafter, the lever 32 is rotated to advance the piston 36 and press against the pressing portion 14 b of the plunger 14. Thereafter, when the piston 36 is further moved forward, the plunger 14 is moved forward accordingly, and the fluid substance contained in the cartridge 1 is discharged from the nozzle to the outside through the discharge port 12a.

  The plunger 14 initially contacts the inner peripheral surface of the reinforcing cylindrical portion 13 via the cylindrical portion 2, but contacts the inner peripheral surface of the sliding portion 22 via the cylindrical portion 2 as it advances. At this time, since the inner diameter of the sliding portion 22 and the inner diameter of the reinforcing cylindrical portion 13 (= the outer diameter of the base end portion of the cylindrical portion 11) are substantially the same, the plunger 14 moves from the inside of the reinforcing cylindrical portion 13 to the sliding portion. It is possible to move smoothly into the interior of 22.

  As shown in FIG. 11, when the plunger 14 moves forward (advances to a predetermined position) until it hits the bottom 12, almost all of the fluid substance in the cartridge 1 is discharged. That is, the cartridge 1 is used up. At this time, the plunger 14 enters the escape portion 24 via the tip portion of the cylindrical portion 11.

  When the cartridge 1 is used up, the rod 33 and the piston 36 are returned to their original positions, and are escaped from the guide tube 2. Thereafter, the guide tube 3 is lifted upward and removed from the holding portion 37.

  Next, a finger or the like is inserted from the operation concave portion 26 and the outer peripheral surface of the reinforcing cylinder portion 13 is pushed radially inward. Then, as shown in FIGS. 12 and 13, the reinforcing cylindrical portion 13 is bent or broken from the split groove 13 b to have a small diameter, and the engaging convex portion 13 a is detached from the engaging concave portion 25 toward the inside of the guide tube 2. To do. As a result, the cartridge 1 can move forward with respect to the guide tube 2. Therefore, the nozzle is grasped and pulled forward, and the cartridge 1 is extracted from the tip opening of the guide tube 2 (see FIG. 14).

  Here, when the cartridge 1 is extracted from the guide cylinder 2, the plunger 14 has entered the escape portion 24. Therefore, between the inner peripheral surface of the escape portion 24 and the outer peripheral surface of the tip portion of the cylinder portion 11, The friction resistance does not act at all, or only a small friction resistance acts to prevent the cartridge 1 from dropping downward from the guide tube 2. Therefore, the cartridge 1 can be easily extracted from the guide tube 2. Further, since the piston 36 is extracted from the guide cylinder 2 and the plunger 14 before the cartridge 1 is extracted from the guide cylinder 2, the piston 36 does not get in the way when the cartridge 1 is extracted from the guide cylinder 2.

  Further, since it is not necessary to push the plunger 14 out of the guide cylinder 2 by the piston 36, the length of the rod 33 can be shortened by the length of the plunger 14, and the discharge gun 3 can be downsized accordingly. it can.

  15 and 16 show a discharge gun 3 'in which the guide cylinder 2 is provided so as not to be detachable. In the discharge gun 3 ′, a pair of upper and lower support arm portions 39 (only one support arm portion 39 is shown) is provided at the distal end portion of the gun body 31 in place of the holding portion 37. The support arm portion 39 extends in parallel with the rod 33. A portion closer to the base end side than the center portion of the guide tube 2 is supported at the distal end portion of each rod 39 so as to be rotatable in the horizontal direction around an axis line facing the vertical direction. The rotation range of the guide tube 2 is regulated between the use position shown in FIG. 15 and the insertion position that is approximately 90 ° away from the use position. When the guide cylinder 2 is positioned at the use position, the axis of the guide cylinder 2 coincides with the axis of the rod 33, and the plunger 14 can be pressed and moved by the piston 36. On the other hand, when the guide tube 2 is positioned at the insertion position or a position in the vicinity thereof, the plunger 1 can be inserted into the guide tube 2 from its proximal end opening. Since the other configuration is the same as that of the discharge gun 3, the same parts are denoted by the same reference numerals and the description thereof is omitted.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the summary, it can change suitably.
For example, in the above-described embodiment, the guide tube 2 is used for the discharge guns 3 and 3 ′, but it can also be used for other discharge devices.
Further, in the above embodiment, the cartridge 1 is made immovable to the tip side with respect to the guide cylinder 2 by engaging the engagement convex portion 13a with the engagement concave portion 25. An engaging portion that engages with the reinforcing cylinder portion 13 of the cartridge 1 to prevent the cartridge 1 from moving toward the tip side may be provided. In that case, the engagement recess 25 is unnecessary.

It is a longitudinal cross-sectional view which shows one Embodiment of the guide cylinder for discharge apparatuses which concerns on this invention. FIG. 2 is a view taken in the direction of arrow X in FIG. It is a longitudinal cross-sectional view which shows the same embodiment in the state in which the cartridge was inserted. FIG. 4 is a view taken in the direction of arrow X in FIG. 3. It is a front view which shows an example of the cartridge from which a fluid substance is discharged using the guide cylinder shown in FIGS. It is a top view which shows the cartridge. FIG. 6 is an enlarged view taken along arrow X in FIG. 5. FIG. 6 is a partially omitted enlarged sectional view taken along line YY in FIG. 5. FIG. 5 is a partially cutaway side view showing a discharge gun to which the cartridge shown in FIGS. 1 to 4 is detachably attached. It is a partially cutaway side view showing the discharge gun in a state where a guide tube is attached. It is a longitudinal cross-sectional view of the guide cylinder shown in the state moved by the piston of the discharge gun until the plunger hits the bottom. It is a longitudinal cross-sectional view of the guide cylinder shown in a state where the reinforcing cylinder part is bent and the engaging convex part is detached from the engaging concave part. FIG. 13 is a view taken in the direction of arrow X in FIG. 12. It is a longitudinal cross-sectional view which shows the state in the middle of extracting the cartridge from a guide cylinder. It is a perspective view which shows the discharge gun to which the guide cylinder concerning this invention was attached so that rotation was possible in the state by which the guide cylinder was rotated to the use position. It is a perspective view which shows the discharge gun in the state in which the guide cylinder was rotated to the insertion position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cartridge 2 Guide cylinder 11 Cylinder part 12 Bottom part 12a Discharge port 14 Plunger 21 Cylinder main body 24 Escape part (escape hole)

Claims (1)

A cylindrical portion formed of a flexible film-like body, a bottom portion provided at the distal end portion of the cylindrical portion, and a plunger provided to be slidable to the distal end side on the inner peripheral surface of the proximal end portion of the cylindrical portion; A discharge port provided in the bottom by moving the plunger of a cartridge containing a fluid substance in the cylinder part between the bottom part and the plunger to the tip side of the cylinder part. In the guide cylinder for a discharge device, which is used when discharging from the cylinder, has a cylinder main body into which the cartridge is inserted, and the plunger is movably pressed and contacted with the inner peripheral surface of the cylinder main body via the cylinder portion.
On the inner peripheral surface of the front end portion of the cylinder body, there is an escape hole that extends from the front end surface to the rear end side with a predetermined length, and into which the plunger enters when the plunger moves toward a predetermined position toward the front end side of the cylinder portion. When the plunger is inserted into the escape hole, the frictional resistance generated between the inner peripheral surface of the escape hole and the outer peripheral surface of the cylindrical portion is less than a predetermined magnitude. Guide tube for a discharge device, characterized in that the inner diameter of the escape hole is set

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