WO2011132714A1 - 吐出器具及び吐出器具の充填材料の充填方法 - Google Patents
吐出器具及び吐出器具の充填材料の充填方法 Download PDFInfo
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- WO2011132714A1 WO2011132714A1 PCT/JP2011/059743 JP2011059743W WO2011132714A1 WO 2011132714 A1 WO2011132714 A1 WO 2011132714A1 JP 2011059743 W JP2011059743 W JP 2011059743W WO 2011132714 A1 WO2011132714 A1 WO 2011132714A1
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- Prior art keywords
- filling
- filling material
- piston
- chamber
- cylindrical member
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
- B05C17/00579—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/66—Capsules for filling material
Definitions
- the present invention relates to a discharge device capable of filling a filling material having viscosity into a container or a container having a small nozzle diameter without applying a large pressure, and a method of filling the filling material of the discharge device.
- a disposable container for filling materials for dental treatment contains a sufficient amount of dental filling material for a single use, usually in a single use. Discarded.
- a container is provided with a cylindrical body, a nozzle is formed at the tip of the body, and a piston is accommodated inside the body. The piston is disposed on the front end side of the body portion, that is, on the nozzle side before filling with the filling material.
- a stock container incorporating the filling material is used.
- the stock container is provided with a nozzle outlet of the disposable container, and the nozzle of the disposable container is set in the inlet.
- the filling material taken into the stock container is pressurized, the filling material is injected into the disposable container from the nozzle, and at the same time, the piston in the container is pushed back into the filling material.
- the piston retracts to a predetermined position, the injection is stopped and the filling material is filled in the disposable container.
- the reason why the piston is disposed at the tip of the barrel portion of the disposable container at the initial stage of injecting the filling material is to prevent air from remaining in the container. That is, when the filling material is injected from the rear end side of the trunk part, the filling material drips from the rear end side opening toward the filling surface on the leading end side. , It is easy to entrain air.
- a piston is disposed at the tip of the barrel of the disposable container, the filling material is injected into the container from the nozzle, the filling surface and the front end surface of the piston are brought into close contact with each other, and the piston is increased as the filling amount increases.
- the residual air in the filled material can be greatly reduced.
- the injection of the filling material is stopped at the predetermined retracted position of the piston, so that the filling material can be accurately injected.
- a viscous filling material When a viscous filling material is filled in, for example, a container having a diameter of about 5 mm, a certain amount of pressure is required for filling the container by dripping as it is because of its viscosity.
- the disposable container has a small diameter of the nozzle into which the filling material is injected, and in the injection method of Patent Document 1, when injecting a highly viscous filling material, for example, about 100 to 300 N if the filling material is a dental material. Great pressure is applied.
- the load that causes the filling material to retract the piston 4 is also applied, and there are problems such as separation into a liquid component (monomer) and a solid component (filler such as filler), and problems such as curing, which lowers the quality of the filling material. It becomes a factor to make.
- the piston is disposed at the tip position of the barrel portion of the disposable container at the initial stage of the filling material injection so that air does not remain in the container. If the air is to be vented, the inner peripheral surface of the container and the outer peripheral surface of the piston may be loosely fitted, but if it is too loose, the filling material may escape with the air. If the inner peripheral surface of the container and the outer peripheral surface of the piston are fitted tightly, air cannot escape. On the other hand, for the filling material having a small viscosity, if the air is vented from between the piston and the inner peripheral surface of the container when the filling material is injected, the filling material leaks together with the air.
- the discharge device of the present invention has a filling chamber formed in a cylindrical member that contains the filling material, and a dispensing portion that includes a dispensing nozzle for dispensing the filling material to the outside. And a discharge device comprising a piston that pushes the filling material toward the front end side of the filling chamber and dispenses the filling material from the dispensing nozzle, wherein the dispensing portion is formed separately from the filling chamber.
- the pouring part is formed to be attachable to an opening at one end of the cylindrical member, and the opening is formed as a filling port for the filling material, and the filling material is injected from the filling port into the filling chamber.
- the extraction portion is connected to the opening of the cylindrical member.
- the pouring part is formed by integral molding with a main body that detachably accommodates the filling chamber, the filling chamber is accommodated in the main body, and the pouring part is connected to the filling port. be able to.
- the discharge device forms the filling chamber with an elastic member so as to increase the volume of the filling chamber with an elastic force when the piston is pressed, and forms a gap between the main body and the filling chamber, The volume of the filling chamber can be reduced after the piston is pressed.
- the filling material filling method for these discharge devices is press-fitted from the stock container filled with the filling material into the filling chamber of the discharge device through the extrusion port formed in the stock container.
- an opening on one end side of the filling chamber is connected to the extrusion port of the stock container, and a piston is set on the opening side, and the filling material filled in the stock container is added.
- a pressurizing step for pressing a filling step for filling the filling chamber with the filling material while pressing the piston backward with the filling material extruded from the extrusion port by the pressurizing step, and filling the filling material in the filling chamber
- the discharge device may be formed with a groove on the inner peripheral surface of the cylindrical member, and the groove may be formed from the other end side of the cylindrical member to the filling chamber at the retracted position of the piston. .
- the discharge device forms a step on the inner peripheral surface of the cylindrical member corresponding to the end portion of the groove on the filling chamber side, and the portion from the step to the one end side opening of the filling chamber is The reduced diameter portion of the inner diameter into which the piston is inserted in a tightly fitted state, and the portion extending from the step to the opening on the other end side of the filling chamber is enlarged in the inner diameter into which the piston is inserted in a loosely fitted state. It can be a diameter part.
- the filling material filling method for these discharge devices is press-fitted from the stock container filled with the filling material into the filling chamber of the discharge device through the extrusion port formed in the stock container.
- an opening of the one end side of the filling chamber is connected to the extrusion port of the stock container, and the piston is set in the retracted position, and the filling material filled in the stock container is added.
- a pressurizing step for pressing, a filling step for filling the filling chamber with a filling material while extracting air from the groove formed on the inner peripheral surface of the cylindrical member by the pressurizing step, and the filling chamber And a mounting step of connecting a pouring part having a filling material pouring nozzle to the opening on one end side of the filling chamber after filling with the filling material.
- the air in the filling chamber is tubular in the filling step.
- the filling chamber can be filled with a filling material while also removing from the gap between the inner circumferential surface of the cylindrical member and the outer circumferential surface of the piston in the enlarged diameter portion of the member.
- the dispensing part is formed separately from the filling chamber, the dispensing part is formed so as to be attachable to an opening at one end of the filling chamber, and the opening is made of the filling material. It was formed as a filling port, and after the filling material was injected from the filling port into the filling chamber, the extraction portion was connected to the filling chamber. As described above, since the filling material is injected from the opening of the filling chamber, it is possible to prevent a large pressure from being applied to the filling material during the filling material filling into the filling chamber. Therefore, a phenomenon that the filling material is separated into a liquid component and a solid component and curing can be prevented.
- the filling material does not have to be filled from the nozzle port, it is particularly effective for the conventional one that has to be used in which the nozzle port diameter of the extraction portion is small.
- the filling chamber is formed of an elastic member so as to increase the volume of the filling chamber with an elastic force, and a gap is formed between the main body and the filling chamber, thereby ending the piston pressing. Later, since the volume of the filling chamber is reduced, it is possible to prevent the filling material from adhering to the nozzle of the dispensing portion.
- the filling material having a small viscosity has an effect of bleeding air from the filling chamber and an effect of preventing leakage of the filling material. Moreover, since the pressure of the filling material is not applied, mixing of bubbles can be prevented.
- FIG. 2 is a cross-sectional view in the XX line direction of FIG. It is a disassembled sectional view of the discharge device of FIG.
- FIG. 1 shows a procedure for injecting a filling material into the discharge device of FIG.
- A is a cross-sectional view of a state in which one end of a cylindrical member is set at an extrusion port of a stock container
- B is a pressurization of the filling material in the stock container
- C is a cross-sectional view of the state in which the filling material is further filled and the piston is further retracted.
- A is a cross-sectional view of a filling chamber filled with a filling material
- B is a cross-sectional view of a state where a cylindrical member is inserted into the main body
- C is a cross-section of a state where the cylindrical member is accommodated inside the main body.
- A shows the state where filling material was poured into a filling room from a stock container
- B is sectional drawing of the state before mounting an injection part into filling room
- C is It is sectional drawing of the state which mounted
- A is sectional drawing of the state which filled the filling material into the filling chamber
- B is sectional drawing of the state which is extruding the filling material with the piston
- C is a cross-sectional view immediately before stopping the extrusion of the filling material
- D is a cross-sectional view immediately after stopping the extrusion of the filling material.
- A is a sectional view of an initial position of a cylindrical member and a piston at the time of injection of a filling material of a discharge device
- B is a state where filling material is injecting to the middle
- Sectional drawing C is a sectional view when the filling material is poured out.
- FIG. 1 is a cross-sectional view of a discharge device used for dentistry according to the present invention
- FIG. 2 is a cross-sectional view in the direction of line XX of FIG. 1
- FIG. 3 is an exploded cross-sectional view of the discharge device.
- the discharge device 1 is normally used so as to be discarded after a single use, and is composed of a main body 2, a cylindrical member 3, a piston 4 and a cap 5 each formed of a synthetic resin. .
- the main body 2 is provided with a cylinder-shaped body portion 6, and a pouring portion 7 is formed on the front end side of the body portion 6 and a large-diameter portion 8 is formed on the rear end side by integral molding.
- the body portion 6 has a circular cross section, and a step portion 10 having a width substantially equal to the thickness of the tubular member 3 is formed on the inner side in the radial direction at the boundary with the extraction portion 7.
- a stopper portion 11 having a step formed radially outward from the inner peripheral surface is formed.
- the pouring part 7 forms a tapered surface 15 that tapers from the step part 10 toward the tip side, and the mouth of the nozzle 12 is formed in the inner space of the pouring part 7 on the side part on the tip side of the taper surface 15. It is formed so as to communicate.
- the cylindrical nozzle 12 has the same diameter from the front end to the rear end.
- the nozzle 12 is formed with an inclination of about 45 degrees toward the distal end side with respect to the axis of the main body.
- a cap 5 is put on the tip side of the nozzle 12.
- the cylindrical member 3 is accommodated inside the main body 2 and is accommodated so that the inner peripheral surface of the main body 2 is in close contact with the outer peripheral surface of the cylindrical member 3.
- a flange portion 14 is formed at the rear end of the tubular member 3 so as to protrude radially outward.
- the outer shape of the flange portion 14 is formed so as to correspond to the inner surface shape of the stopper portion 11 of the main body 2. Therefore, in a state where the cylindrical member 3 is set on the main body 2, the flange portion 14 is prevented from moving toward the distal end side of the cylindrical member 3 by the stopper portion 11.
- the length from the tip of the cylindrical member 3 to the flange portion 14 and the length from the stopper portion 11 to the step portion 10 of the main body 2 are formed substantially equal.
- An opening 9 is provided on the distal end side of the cylindrical member 3. This opening 9 is used as a filling port for the filling material.
- the piston 4 is provided with a conical portion 16 at the front end and a cylindrical portion 17 on the rear end side.
- the shape of the conical portion 16 is formed substantially equal to the inner peripheral shape of the tapered surface 15 of the main body 2.
- the outer diameter of the cylindrical portion 17 is formed to be the same as or substantially equal to the inner diameter of the cylindrical member 3.
- the piston 4 is formed so as to slide on the inner peripheral surface of the cylindrical member 3 in consideration of the elastic force of the cylindrical member 3 and the like.
- the space between the outer peripheral surface of the piston 4 and the inner peripheral surface of the cylindrical member 3 is formed so as to have a sealing property that allows some air to flow when pressure is applied.
- An internal space of the cylindrical member 3 formed by the inner peripheral surface of the cylindrical member 3 and the surface of the conical portion 16 of the piston 4 serves as a filling chamber 24 for the filling material.
- a stock container 19 is a container filled with a filling material, and an extrusion port 20 for the filling material is formed on one side surface.
- the extrusion port 20 is provided with a fixing member 22 capable of airtightly setting one end side of the cylindrical member 3.
- the stock container 19 is provided with a pressurizing means (not shown) for pressurizing the filling material and discharging the filling material from the extrusion port 20.
- the position sensor 23 detects the rearmost allowable movement position of the piston 4 by contacting the rear end of the piston 4 and retreating to a predetermined position.
- a control unit not shown.
- the size and shape of the discharge device 1 vary depending on the application, but the inside diameter of the dental discharge device is preferably 2 to 6 mm.
- the inner diameter of the cylindrical member 3 is 4.1 mm
- the axial length is 23 mm
- the inner diameter of the nozzle 12 is 1.95 mm, which is compared with the radial sectional area of the cylindrical member 3.
- the radial cross-sectional area of the nozzle 12 is sufficiently small.
- the discharge device 1 is in a state of being disassembled with respect to the main body 2 and the like, and first, the piston 4 is set on the inner periphery on the front end side of the cylindrical member 3. At this time, the conical portion 16 of the piston 4 is arranged toward the opening 9 side.
- the tip opening 9 of the cylindrical member 3 is set in the extrusion port 20 of the stock container 19. That is, the opening 9 is assembled to the fixing member 22.
- the filling material of the stock container 19 is pressurized by a pressurizing means (not shown).
- examples of the filling material having viscosity used for dentistry include dental cement, crown restoration material, and composite resin for dental filling restoration.
- the filling material is injected from the extrusion port 20 into the opening 9 of the cylindrical member 3 by pressurization of the filling material in the stock container 19.
- the inner diameter of the cylindrical member 3 is such that the piston 4 is inserted in a loosely fitted state, so that the inner peripheral surface of the cylindrical member 3 and the outer peripheral surface of the piston 4 are such that air can escape with an appropriate load. Since it is formed in an airtight manner, the filling material is injected into the filling chamber 24 without a gap when the air escapes. The filling material is difficult to come off due to its viscosity.
- the piston 4 moves backward by the pressing force of the filling material.
- the inner diameter of the opening 9 of the cylindrical member 3 (the inner diameter of the filling chamber 24) is formed larger than the inner diameter of the nozzle 12.
- the filling material is injected into the filling chamber 24, the piston 4 moves backward, contacts the position sensor 23, and the detection part of the position sensor 23 moves backward by a predetermined amount. Due to the retreat of the detection unit, a control unit (not shown) electrically connected to the position sensor 23 determines that the piston 4 has reached the rearmost allowable movement position, and the injection of the filling material is stopped, and the filling chamber 24 is filled. Is filled with a predetermined amount of filler. As shown in the state of FIG. 4B from the state of FIG. 4A, the air at the tip side of the piston 4 is vented, and the filling amount of the filling material is monitored by the position sensor 23. An amount is supplied to the filling chamber 24.
- the cylindrical member 3 is removed from the stock container 19, and the cylindrical member 3 is inserted into the main body 2 and accommodated. To do.
- a flange portion 14 is formed at the rear end portion of the tubular member 3.
- the movement of the flange portion 14 is restricted by the stopper portion 11 of the main body 2, whereby the cylindrical member 3 is positioned and accommodated in the main body 2.
- the piston 4 is pressed to push out the remaining air by the amount of the filling material, and then the cap 5 is moved to the nozzle 12. Just put it on.
- the piston 4 of the discharge device 1 When the discharge device 1 is used, the piston 4 of the discharge device 1 is pushed by the push mechanism of the applicator by being set in an extruder called an applicator such as a gun and pulling the trigger of the applicator.
- the amount of filler is discharged.
- the amount of filler can be injected into the filling chamber 24 with a small applied pressure in this way, the filling chamber 24 can be filled without deteriorating the quality of the amount of filler.
- the discharge device 31 includes a cylindrical member 32, a piston 33, and a dispensing portion 34, each of which is formed of a synthetic resin.
- the main body 2 is provided and the cylindrical member 3 is accommodated in the main body 2.
- the main body 2 is omitted.
- pouring part 7 was integrally formed in the main body 2 in the said embodiment, it differs from the said embodiment in that the extraction
- annular groove 36 is formed on the inner peripheral surface of the one end opening 35 of the cylindrical tubular member 32.
- annular protrusion 37 is formed at the opening edge of the extraction part 34 forming the nozzle 38, and the annular protrusion 37 is fitted into the annular groove 36.
- the tubular member 32 and the extraction portion 34 are formed in an airtight and integrated manner. These joints may be joined by welding (heat, ultrasonic waves, etc.), an adhesive, or a screw, although depending on the amount of filler.
- a piston 33 is disposed inside the cylindrical member 32.
- the one end (tip side) opening 35 of the cylindrical member 32 should just be fixed to the stock container 19, as shown to A of FIG.
- the other filling procedures are the same as those in the first embodiment (A to C in FIG. 4 and A in FIG. 5).
- the annular protrusion of the extraction portion 34 is inserted into the annular groove 36 formed in the opening 35 portion of the cylindrical member 32.
- the discharge device 31 is completed by fitting the portion 37.
- the extraction part 34 may be directly connected to the cylindrical member 32.
- the filling chamber 39 can be filled with an accurate filling material.
- the discharge device 41 includes a main body 42, a cylindrical member 43, and a piston 44, each of which is formed of a synthetic resin.
- a gap 46 is formed between the inner peripheral surface of the main body 42 and the inner peripheral surface of the cylindrical member 43, and the material of the cylindrical member 43 is different from that of the first embodiment. It is essentially different from the first embodiment in that it is formed of a material having elasticity at a certain internal pressure or higher.
- a pouring part 45 is formed in the main body 42 by integral molding, and a cylindrical member 43 forming a filling chamber 49 is formed separately from the main body 42 and the pouring part 45.
- a stepped portion 47 extending inward in the radial direction from the inner peripheral surface of the main body 42 is formed at the boundary between the distal end of the tubular member 43 and the main body 42 and the extraction portion 45.
- the distal end side opening 48 of the cylindrical member 43 is formed so as to contact the stepped portion 47.
- a gap is formed between the inner periphery of the main body 42 and the outer peripheral surface of the cylindrical member 43.
- the cylindrical member 43 is formed of a material having elasticity, while the main body 42 is formed of a synthetic resin material having a relatively small elasticity.
- the filling material filling procedure into the discharge device 41 in this embodiment is the same as that in the first embodiment (A to C in FIG. 4 and A in FIG. 5).
- the filling material is injected from the opening 48 of 43.
- the cylindrical member 43 filled with the filling material is accommodated in the main body 42 as shown in FIG. Even if such a structure is employed, it is possible to prevent a large pressure from being applied to the filling material in the filling chamber 49 as in the first embodiment. In this way, the problem that the filling material is separated into the liquid component and the solid component and the problem of curing are solved. Further, the filling material can be filled into the filling chamber 49 by an accurate amount.
- the discharge device 41 in the present embodiment has the following effects. As shown in FIG. 7A, when the air existing in the dispensing part 45 is vented, as shown in FIG. 7B, the piston 44 is advanced so that the filling material in the filling chamber 49 is pushed out. . When the filling material is discharged from the nozzle 50, as shown in FIG. 7C, the extrusion of the piston 44 is stopped. Then, the filling material is filled up to the tip of the nozzle 50 shown in FIG. This is not limited to the case of air venting, and when the discharge device 41 is used in a plurality of times, for example, when used for the second time, the filling material is filled up to the tip of the nozzle 50.
- the filling material is left outside the mouth of the nozzle 50 and adheres to the tip of the nozzle 50, and the attached filling material hangs down at an unintended location.
- the filling material may be ejected from the nozzle 50 due to a temperature change if the material has a small viscosity.
- the filling material may be ejected from the nozzle 50 due to expansion of air due to a temperature change or the like, which is not desirable.
- the peripheral wall of the cylindrical member 43 is once swollen to the outer peripheral side due to the internal pressure of the filling material, as shown in FIG. In the state, the filling material is discharged. And as shown to C of FIG. 7, a filling material is discharged to a desired location and pushing of a piston is stopped. Then, as shown in FIG. 7D, the peripheral wall of the cylindrical member 43 returns to its original state against the internal pressure of the filling material.
- the volume of the cylindrical member 43 decreases from the expanded state.
- the filling material present at the mouth of the nozzle 50 is drawn back into the nozzle 50 (see D in FIG. 7). Therefore, even if the filling material remains outside the mouth of the nozzle 50, it can be prevented from being pulled back and attached to the tip of the nozzle 50. Furthermore, even if the filling chamber 49 contains air, the filling material can be prevented from being ejected due to a temperature change. In particular, in the discharge device 41 of this embodiment, there exists an advantage that the air which exists in the clearance gap between the main body 42 and the cylindrical member 43 exhibits a heat insulation effect.
- the cylindrical member 43 has elasticity so that it expands in accordance with the internal pressure of the filling material, and the filling material effectively fills the filling chamber 49 side. Adjust to return to.
- the wall portion of the main body 42 may be used as a stopper to prevent the tubular member 43 from being expanded beyond a certain level.
- the discharge device 1 of this embodiment is comprised from the main body 2 (refer FIG. 1), the cylindrical member 3, piston 4, and the cap 5 (refer FIG. 1). Since the main body 2 and the cap 5 are the same as those in the first embodiment shown in FIG. 1, reference is also made to FIG.
- a cylindrical member 3 having a circular cross section for containing the filling material is provided with a piston 4 that slides on the inner peripheral surface of the cylindrical member 3, and a filling chamber 24 is formed at a position ahead of the piston 4. At one end of the filling chamber 24 (cylindrical member 3), an opening 9 serving as an inlet for filling material is provided.
- the groove 61 On the inner peripheral surface of the cylindrical member 3, one linear groove 61 extending from the rear side (other end side) to the front side (one end side) of the cylindrical member is formed.
- the groove 61 has a triangular cross section, and the width (the base of the triangle) is preferably 0.3% to 3% with respect to the length of the inner periphery of the cylindrical member 3, and is 0.8% in this embodiment. is there.
- the depth of the groove 61 (the height of the triangle) is preferably 10 to 40% with respect to the thickness of the peripheral wall of the cylindrical member 3, and is 18% in this embodiment.
- the cross-sectional area of the groove 61 is preferably 0.01% or more, particularly preferably 0.02% or more, with respect to the inner cross-sectional area of the cylindrical member 3 (not including the cross-sectional area of the groove 61). In this embodiment, it is 0.04%.
- a plurality of grooves 61 may be provided at a predetermined interval with respect to the inner peripheral surface of the cylindrical member 3.
- the length of the groove 61 extends to the filling chamber 24 side beyond the portion where the outer peripheral surface of the cylindrical portion 17 of the piston 4 is in contact with the inner peripheral surface of the cylindrical member 3 when the piston 4 is in the retracted position. It is necessary. That is, when the piston 4 is in the retracted position, the filling chamber 24 and the other end side of the tubular member 3 are communicated with each other through the groove 61.
- a step 62 projecting radially inward is formed on the inner peripheral surface of the cylindrical member 3 so as to substantially correspond to the end portion of the groove 61 on the filling chamber 24 side.
- the inner diameter is slightly larger from the step 62 to the rear end side of the tubular member 3, and the enlarged diameter portion 63 into which the piston is inserted in a loosely fitted state is formed.
- the inner diameter of the cylindrical member 3 is smaller than that on the rear end side, and a reduced diameter portion 64 into which the piston is inserted in a tightly fitted state is formed.
- the inner diameter A of the enlarged diameter portion 63 on the rear end side is the same as the outer diameter of the cylindrical portion 17 of the piston 4 or larger by 0 to 2%, and the piston 4 is loosely fitted to the enlarged diameter portion 63. It is preferable to be inserted.
- the inner diameter A and the outer diameter of the cylindrical portion 17 are the same size, specifically 4.2 mm. Therefore, the width of the step 62 in this embodiment is 0.05 mm.
- the cylindrical member is accommodated inside the main body 2 (FIG. 1), and is accommodated so that the inner peripheral surface of the main body 2 is in close contact with the outer peripheral surface of the cylindrical member 3.
- the piston 4 is provided with a conical portion 16 at the front end and a cylindrical portion 17 at the rear end side. The piston 4 is formed so as to slide on the inner peripheral surface of the cylindrical member 3.
- the filling procedure of the filling material into the discharge device in the present embodiment will be described.
- it is particularly used when filling the filling chamber 24 with a material having a low viscosity with respect to the filling material.
- the filling material is discharged from between the tubular member 3 and the piston 4 when the filling material is filled or when the filling material is discharged. This is because it leaks or bubbles are mixed in the filling material.
- the viscosity of the filling material in this embodiment is 10 to 2000 poise, and more preferably 50 to 1000 poise.
- the piston 4 is disposed in the retracted position in the cylindrical member 3. That is, the piston 4 is disposed at a position slightly more forward than the position where the filling material is filled with an appropriate amount or the appropriate amount position.
- This arrangement location is located in the enlarged diameter portion 63 of the tubular member 3.
- the piston 4 disposed in the enlarged diameter portion 63 of the cylindrical member 3 is Even in the case where the filling material is injected with the cylindrical member 3 standing vertically, the outer peripheral wall does not enter the tip side (the reduced diameter portion 64 side) of the step 62.
- the filling material is injected into the opening 9 of the cylindrical member 3 by pressurization of the filling material from the stock container 19 (see FIG. 4).
- the groove 62 becomes an air vent passage in the filling chamber 24, and the air escapes from the filling chamber 24. Since the piston 4 is located in the enlarged diameter portion 63 of the cylindrical member 3, the air in the filling chamber 24 is also released from the gap between the inner peripheral surface of the cylindrical member and the outer peripheral surface of the piston.
- the pressurization from the stock container 19 does not apply a large pressure to the filling material, so that generation of bubbles can be prevented without entraining air.
- the outer diameter of the piston 4 is larger than the inner diameter of the reduced diameter portion 64 and the residual air remains, so that the piston 4 moves backward. It is difficult to operate smoothly. Further, air pressure is applied to the filling material, and bubbles are generated. When an appropriate amount of filling material is filled in the filling chamber 24, the position sensor 23 (FIG. 4) detects and the injection is finished.
- the piston 4 moves forward and internal pressure is applied to the filling chamber 24.
- the size of the cross-sectional area of the groove 61 is small, a filling material that is more or less viscous unlike air is discharged from the groove 61. It is suppressed from coming off.
- the piston 4 is in the retracted position, and the cylindrical portion 17 of the piston 4 reaches the reduced diameter portion 64 only by moving forward a small distance. In this way, the cylindrical portion 17 closes the groove 61, and the outer diameter of the cylindrical portion 17 is larger than the inner diameter of the reduced diameter portion 64, so that the outer peripheral surface of the piston 4 and the inner peripheral surface of the tubular member 3 are in close contact with each other.
- the shape of the stepped portion 61 may be a conical (tapered) surface whose front side is reduced in diameter. In particular, when the piston 4 has a cylindrical shape, it can be effectively prevented from being caught.
- the air could be vented.
- the piston 4 was pressed during the dispensing of the discharge device 1, slight leakage of the filling member was confirmed from between the groove 61 and the cylindrical portion 17 of the piston 4 and the cylindrical member 3.
- the filling material is filled at the retracted position of the piston 4. Very little residual air was observed in the chamber 24.
- the low-viscosity results are as described above.
- the size of the groove 61 is appropriately set even in the cylindrical member 3 in which only the groove 61 is formed. If changed, it is possible to allow only air to escape from the groove 61 and not to leak only the filling member.
- the size of the inner diameter of the inner peripheral surface is adjusted, only air escapes from the cylindrical portion 17 of the piston 4 and the inner peripheral surface of the cylindrical member 3, and the filling material escapes. It is possible to avoid it.
- the groove 61 and the step 62 only air is allowed to escape from the filling chamber 24, and the effect of preventing leakage of the filling material is more remarkably exhibited, and the adjustment becomes easy.
- a gap is formed between the main body 42 and the cylindrical member 43 to give elasticity to the cylindrical member 43 so that the filling material is returned to the inner side of the nozzle 50.
- the cylindrical member 32 may be formed of an elastic material, and when the filling material is pressed by the piston 33, the cylindrical member 32 may be expanded in the outer circumferential direction.
- the stopper effect by the main body and the heat insulation effect by forming a gap cannot be exhibited.
- step difference 62 which were formed in the cylindrical member 3 in the 4th Embodiment of this invention were demonstrated using 1st Embodiment, it is applicable also to 2nd Embodiment.
- the third embodiment can also be applied. However, in the third embodiment, since the elastic force is large, the conditions of the grooves and the steps are different. Furthermore, although the cross-sectional shape of the groove 61 is a triangle, the shape can be appropriately changed such as a quadrangle or a semicircle.
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Abstract
Description
使い捨て容器に充填材料を注入するときには、充填材料を取り入れたストック容器が用いられる。ストック容器には、使い捨て容器のノズルの差込口が設けられ、使い捨て容器は、ノズルが押し込み口にセットされる。使い捨て容器への注入時には、ストック容器に取り入れた充填材料が加圧され、ノズルから使い捨て容器の内部に充填材料が注入され、同時に容器内のピストンが充填材料に押し込まれるようにして後退する。ピストンが所定位置まで後退すると注入が停止され、使い捨て容器内に充填材料が充填される。
充填材料の注入初期時に、使い捨て容器の胴部の先端位置にピストンを配置するのは、容器内には空気が残留しないようにするためである。すなわち、胴部の後端側から充填材料を注入した場合、充填材料は、後端側開口から先端側の充填面に向かって垂れ流されるため、胴部を流れる途中や充填面への流入時に、どうしても空気を巻き込み易くなる。これに対して、使い捨て容器の胴部の先端位置にピストンを配置し、前記ノズルから容器内部に充填材料が注入され、充填面とピストンの前端面とを密着させて、充填量の増加と共にピストンを後退させていけば、充填された材料への空気の残留は大幅に低減できる。こうして、残余空気をなくし、ピストンが所定の後退位置で充填材料の注入を停止することで、正確な充填材料の注入が可能になる。
使い捨て容器は、充填材料が注入されるノズルの径が細く、特許文献1の注入方法では、高粘性の充填材料を注入する際、例えば、歯科材料の充填材料であれば、約100~300N程度の大きな圧力が加わる。また、充填材料がピストン4を後退させる負荷も加わり、液成分(モノマー)と固体成分(フィラー等の充填材)とに分離する現象や、硬化といった問題点が挙げられ、充填材料の品質を低下させる要因になる。
空気を抜くようにするのであれば、容器の内周面とピストンの外周面との間を緩く嵌合させればよいが、余りにも緩くすると充填材料も空気とともに抜けてしまうことがある。容器の内周面とピストンの外周面との間をきつく嵌合させると、空気が抜けなくなる。
一方、粘性の小さな充填材料については、充填材料の注入時にピストンと容器の内周面との間から空気抜きを行うようにすると、空気とともに充填材料が漏れてしまう。ピストンと容器の内周面との隙間をなくすと、注入時における圧力で、充填材料に空気が巻き込まれて気泡となり、そのまま気泡が内部に残留してしまうことがある。すなわち、低粘度であるがゆえに気泡を生じさせることなく、空気抜きのみを行うようにすることが難しく、いずれにしても比較的高価な歯科用充填材料が無駄になっていた。
本発明は、このような事情に鑑みてなされたものであって、充填材料に大きな圧力を加えることなく容器内に充填することができる吐出器具及び吐出器具の充填材料の充填方法を提供することを目的とする。
上記吐出器具は前記注出部を、前記充填室を着脱可能に収容する本体と一体成形によって形成し、前記充填室を前記本体内に収容させて、前記注出部を前記充填口に連結させることができる。
上記吐出器具は、前記ピストンの押圧時において、前記充填室の容積を弾性力で増大させるよう前記充填室を弾性部材で形成するとともに、前記本体と前記充填室との間に隙間を形成し、前記ピストンの押圧終了後に、前記充填室の容積を減少させることができる。
これらの吐出器具への充填材料の充填方法は、上記目的を達成するために、充填材料を充填したストック容器から吐出器具の充填室内に、前記ストック容器に形成された押出口を介して圧入される充填材料の充填方法において、前記ストック容器の押出口に前記充填室の一端側開口を接続し、該開口側にピストンをセットする押出口セット工程と、前記ストック容器に充填した充填材料を加圧する加圧工程と、該加圧工程によって前記押出口から押出される充填材料で前記ピストンを後方へ押圧させながら前記充填室に充填材料を充填させる充填工程と、前記充填室の充填材料の充填後に、充填材料の注出ノズルを備えた注出部を前記充填室の一端側開口に連結させる装着工程とを含むようにした。
また、前記吐出器具は、前記筒状部材の内周面に溝を形成し、該溝は前記ピストンの後退位置にて、筒状部材の他端側から充填室内に至るまで形成させることができる。
上記吐出器具は、前記溝の充填室側の終端部に対応させて、前記筒状部材の内周面に段差を形成し、該段差から前記充填室の一端側開口に至るまでの部分は、前記ピストンが密嵌状態で挿入される内径の縮径部とし、他方、該段差から前記充填室の他端側開口に至るまでの部分は、前記ピストンが緩嵌状態で挿入される内径の拡径部とすることができる。
これらの吐出器具への充填材料の充填方法は、上記目的を達成するために、充填材料を充填したストック容器から吐出器具の充填室内に、前記ストック容器に形成された押出口を介して圧入される充填材料の充填方法において、前記ストック容器の押出口に前記充填室の一端側開口を接続し、ピストンをその後退位置にセットする押出口セット工程と、前記ストック容器に充填した充填材料を加圧する加圧工程と、該加圧工程によって、前記充填室の空気を、筒状部材の内周面に形成した溝から抜きながら、該充填室に充填材料を充填させる充填工程と、前記充填室の充填材料の充填後に、充填材料の注出ノズルを備えた注出部を前記充填室の一端側開口に連結させる装着工程とを含むようにした。
この吐出器具への充填材料の充填方法において、突出器具が、前記筒状部材の内周面に段差を形成したものである場合には、前記充填工程において、前記充填室の空気を、筒状部材の拡径部における筒状部材の内周面と前記ピストンの外周面との間隙からも抜きながら、該充填室に充填材料を充填するように行なうことができる。
また、ピストンの押圧時において、前記充填室の容積を弾性力で増大させるよう前記充填室を弾性部材で形成するとともに、本体と前記充填室との間に隙間を形成し、前記ピストンの押圧終了後に、前記充填室の容積を減少させるようにしたので、注出部のノズルに充填材料が付着するのを防止することができる。
また、筒状容器に溝や段差を形成することにより、充填材料の粘度に応じた吐出器具の形成が容易になる。特に粘度の小さな充填材料に対して充填室からの空気抜きの効果や、充填材料の漏れを防止する効果がある。また、充填材料の圧力がかからないので、気泡の混入を防止することができる。
図1は、本発明に係わる歯科用に用いられる吐出器具の断面図、図2は図1のX-X線方向における断面図、図3は吐出器具の分解断面図である。
吐出器具1は、通常は1回の使用によって廃棄されるよう使用されるものであり、各々が合成樹脂で成形されている本体2、筒状部材3、ピストン4及びキャップ5から構成されている。本体2は、シリンダ形状の胴部6を設け、胴部6の先端側に注出部7、後端側に大径部8を一体成形によって形成している。胴部6は断面が円形であり、注出部7との境界部では、筒状部材3の肉厚にほぼ等しい幅を有する段部10が内周面の径方向内側に形成されている。胴部6の後端側の大径部8では、内周面から径方向外側に段差を形成したストッパ部11が形成されている。
筒状部材3は、本体2の内部に収容され、本体2の内周面が筒状部材3の外周面に密接するように収容されている。筒状部材3の後端には径方向外側に突出するフランジ部14が形成されている。フランジ部14の外形状は、本体2のストッパ部11の内面形状に対応するように形成されている。したがって、筒状部材3を本体2にセットした状態では、フランジ部14は、ストッパ部11によって、筒状部材3の先端側への移動が阻止される。筒状部材3の先端からフランジ部14までの長さと、本体2のストッパ部11から段部10までの長さは、ほぼ等しく形成されている。本体2に筒状部材3を収容するときには、接着剤などで固定することなく収容される。筒状部材3の先端側に開口9が設けられている。この開口9は、充填材料の充填口として使用される。
筒状部材3の内周面とピストン4の円錐部16の面とによって形成される筒状部材3の内部空間が充填材料の充填室24となる。
吐出器具1の筒状部材3の内部に充填材料が注入されると、ピストン4は筒状部材3内の充填室24を後方側に移動する。吐出器具1をストック容器19にセットした状態では、ピストン4の最後方許容移動位置を検出する位置センサー23が配設されている。
なお、吐出器具1の大きさ、形状は用途などによって種々異なるが、歯科用吐出器具の内径は2~6mmであるのが好ましい。一例として、本実施形態では、筒状部材3の内径が4.1mm、軸方向長さが23mm、ノズル12の内径が1.95mmであり、筒状部材3の径方向断面積に比較してノズル12の径方向断面積が充分に小さい。
図4のAに示すように、吐出器具1は本体2などに対して分解された状態であって、初めに筒状部材3の先端側内周に、ピストン4をセットする。この際、ピストン4の円錐部16を開口9側に向けて配置する。次いで、筒状部材3の先端開口9をストック容器19の押出口20にセットする。すなわち、固定部材22に開口9を組み付ける。筒状部材3がストック容器19に固定されると、ストック容器19の充填材料が図示しない加圧手段によって加圧される。
ここで、歯科用に用いられる粘性を有する充填材料については、歯科用セメント、歯冠修復材料、歯科充填修復用コンポジットレジン等がある。
図4のBに示すように、ストック容器19の充填材料の加圧によって、押出口20から筒状部材3の開口9へ充填材料が注入される。筒状部材3の内径は前記ピストン4が緩嵌状態で挿入される大きさであり、そのため筒状部材3の内周面とピストン4の外周面とは、適度な負荷で空気が抜けるような気密性に形成されるので、空気が抜けると充填室24に充填材料が空隙なく注入される。なお、充填材料はその粘性のために抜けにくい。
この際、充填室24やノズル12の内部に、空気が残留すると変性するような充填材料であるならば、ピストン4を押圧して残余空気を充填材量で押し出してからキャップ5をノズル12に被せればよい。
本実施形態では、このように、充填材量を小さな加圧力によって充填室24に注入することができるので、充填材量の品質を低下させることなく充填室24に充填させることができる。
図6のBに示すように、吐出器具31は、各々が合成樹脂で成形されている筒状部材32、ピストン33及び注出部34から構成されている。
上記第1の実施形態では、本体2を設け、筒状部材3を本体2に収容するようにしていたが、本実施形態では本体2を省略するようにしている。また、上記実施形態では本体2に注出部7を一体的に形成したが、本実施形態では、筒状部材32に直接注出部34を接合するようにしたことが上記実施形態とは異なる。
筒状部材32の内部には、ピストン33が配設される。筒状部材32の内周面とピストン33の円錐部40の面とによって形成される筒状部材32の内部空間が充填材料の充填室39となる。
ストック容器19と位置センサー23については、固定部材22の形状が多少異なるが、上記第1の実施形態と同じ符号を付し、その説明は省略する。
吐出器具31の充填室39への充填材料の注入が終了したら、図6のCに示すように、筒状部材32の開口35部に形成した円環溝36に注出部34の円環突出部37を嵌合させて、吐出器具31を完成させる。
このように、筒状部材32に直接注出部34を連結させてもよく、このような構造を採用しても、上記実施形態と同様に充填室39にて、充填材料に大きな圧力が加わることが防止される。加えて、部品点数の軽減させる効果もある。こうして、充填材料が液成分と固体成分とに分離する現象や、硬化といった問題点が解消される。さらには、充填室39に正確な充填材料を充填することができる。
図7のAを参照にして、吐出器具41は、各々が合成樹脂で成形されている本体42、筒状部材43及びピストン44を備えている。本実施形態では、上記第1の実施形態に対して、本体42の内周面と筒状部材43の内周面との間に隙間46が形成されていること、筒状部材43の材質が、一定内圧以上において弾性を有する材料で形成されることが、上記第1の実施形態と本質的に異なっている。
上述したように、本体42の内周と筒状部材43の外周面との間には隙間が形成されている。筒状部材43は弾性を有する材質で形成され、これに対し、本体42が弾性が比較的小さな合成樹脂材料で形成されている。
吐出器具41の充填室49への充填材料の注入が終了したら、図7のAに示すように、充填材料が充填された筒状部材43を本体42に収容する。
このような構造を採用しても、上記第1の実施形態と同様に、充填室49にて充填材料に大きな圧力が加わることが防止される。こうして、充填材料が液成分と固体成分とに分離する現象や、硬化といった問題点が解消される。さらには、充填室49に正確な分量だけ充填材料を充填することができる。
図7のAに示すように、注出部45に存在する空気抜きをするときは、図7のBに示すように、ピストン44を前進させて、充填室49の充填材料を押出すようにする。充填材料がノズル50から吐出されたら図7のCに示すように、ピストン44の押出しを停止する。すると、図7のCに示すノズル50の先端部まで充填材料が充填される。これは、空気抜きの場合に限らず、吐出器具41を複数回に分けて使用する場合、例えば2度目に使用するような場合にも、ノズル50の先端部まで、充填材料が充填されている。
しかしながら、充填材料がノズル50の口の外に残され、ノズル50の先端部に付着したりして、付着した充填材料が意図しない箇所に垂れてしまったりする。充填室49に空気が含まれているような場合は、粘性の小さな材料であれば、温度変化によって充填材料がノズル50から噴き出すことがある。特に、冷蔵室などで保存状態にあった吐出器具41が冷蔵室外に取り出された場合に、温度変化等による空気の膨張で充填材料がノズル50から噴き出すようなことがあり、望ましいことではない。
筒状部材の材質及び隙間の大きさについては、特に触れなかったが、筒状部材43が充填材料の内圧に応じて膨張するような弾性を有し、充填材料が効果的に充填室49側に戻るように調整すればよい。筒状部材43の膨張時において、本体42の壁部をストッパとして一定以上の筒状部材43の膨張を阻止するようにしてもよい。
本実施形態の吐出器具1は、本体2(図1参照)、筒状部材3、ピストン4、及びキャップ5(図1参照)から構成されている。なお、本体2とキャップ5は、図1に示す上記第1の実施形態と同じものが使用されているので、図1も併せて参照する。
充填材料を収容する断面が円形の筒状部材3内部には、筒状部材3の内周面を摺動するピストン4とを備え、ピストン4よりも前側位置は充填室24を形成する。充填室24(筒状部材3)の一端には、充填材料の受入口となる開口9を設けている。
充填室24側における溝61の終端部にほぼ対応させて、筒状部材3の内周面には半径方向内側に突出する段差62を形成している。これによって、段差62よりも筒状部材3の後端側に至るまでは僅かではあるが内径が大きく、前記ピストンが緩嵌状態で挿入される拡径部63を形成している。段差62よりも開口9側は、筒状部材3の内径が後端側よりも縮径し、前記ピストンが密嵌状態で挿入される縮径部64を形成した。
筒状部材は、本体2(図1)の内部に収容され、本体2の内周面が筒状部材3の外周面に密接するように収容されている。
上記第1の実施形態と同様に、ピストン4は先端に円錐部16が設けられ、後端側に円柱部17が設けられている。ピストン4は筒状部材3の内周面を摺動するよう形成する。
本実施形態では、特に、充填材料について粘性の小さな材料を充填室24に充填するときに用いられる。上記第1の実施形態の筒状部材と同じものを粘性の小さな充填材料に用いると、充填材料の充填時や、充填材料の吐出時に筒状部材3とピストン4との間から、充填材料が漏れたり、充填材料中に気泡か混入したりするからである。なお、本実施形態における充填材料の粘度は10~2000ポイズであり、より好適には50~1000ポイズである。
次いで、ストック容器19(図4参照)からの充填材料の加圧によって、筒状部材3の開口9へ充填材料が注入される。図8のBに示すように、充填材料が充填室24に注入されると、充填室24では溝62が空気抜き通路となり、充填室24から空気が抜ける。ピストン4は、筒状部材3の拡径部63に位置しているため、筒状部材の内周面と前記ピストンの外周面との間隙からも、充填室24内の空気が抜ける。空気が抜けると、ストック容器19からの加圧は、充填材料にも大きな圧力が負荷しないので、空気を巻き込むことなく気泡の発生が防止できる。
なお、ピストン4の位置を上記第1の実施形態のように、当初から前端位置に配置すると、ピストン4の外径が縮径部64の内径よりも大きく残留空気も残るので、ピストン4が後退しにくく円滑に操作できなくなる。また、充填材料に空気圧が負荷して気泡が発生してしまう。充填室24に適量の充填材料が充填されると、位置センサー23(図4)が検知して注入が終了する。
また、ピストン4が前進するときに、段差62にあたるが、ピストン4の先端形状が円錐形であるので、円滑に前進することができる。なお、充填材料の注入時にはピストンを縮径部に挿入すると、充填材料の注入圧に加えて充填材料に大きな負荷がかかり好ましくないが、注出時のピストンが前進するときには充填材料に注入時ほどの負荷がかからず、ピストンも縮径部64を円滑に前進することができる。また、この前進時の適度な負荷により、充填材料が粘性の高い場合においても、その注出量の微妙なコントロールが実現でき好ましい。
段部61の形状については、前方側が縮径する円錐(テーパ)面であってもよい。特にピストン4の形状を円柱形にするようなときには、効果的に引っ掛かりを防止することができる。
また、溝61を形成することなく、拡径部63の内径と同じ大きさで形成した筒状部材を用いて、充填材料を開口9から注入させたところ、ピストン4の後退位置にて、充填室24に残留空気が極僅かに確認された。
しかしながら、溝61と段差62を形成することによって、空気のみを充填室24から逃がし、充填材料の漏れを防止する効果がより顕著に発揮され、その調整が容易になる。
例えば、上記第3の実施形態では、本体42と筒状部材43との間に隙間を形成し、筒状部材43に弾性を与えて、ノズル50の内部側に充填材料を戻すようにしていたが、上記第2の実施形態においても、筒状部材32を弾性材料で形成し、ピストン33による充填材料の押圧時に、筒状部材32を外周方向に膨張させるようにしてもよい。ただし、本体によるストッパ効果や隙間を形成することによる断熱効果を発揮させることはできない。
また、本発明の第4の実施形態における、筒状部材3に形成した溝61と段差62について、第1の実施形態を用いて説明したが、第2の実施形態にも適用が可能であり、第3の実施形態でも適用が可能である。ただし、第3の実施形態では、弾性力が大きいので溝や段差の条件は異なる。
さらに、溝61の断面形状は三角形としたが、形状については四角形や半円形など適宜変更が可能である。
2,42 本体
3,43 筒状部材
4,33,44 ピストン
7,34,45 注出部
9 開口(充填口)
12,38,50 ノズル
19 ストック容器
20 押出口
22 固定部材
23 位置センサー
24,39,49 充填室
46 隙間
61 溝
62 段差
63 拡径部
64 縮径部
Claims (8)
- 充填材料を収容する筒状部材内に形成されている充填室と、
充填材料を外部に注出する注出ノズルを備えた注出部と、
前記充填材料を前記充填室の先端側へ押圧して前記注出ノズルから充填材料を注出するピストンとを備えた吐出器具において、
前記注出部を該充填室とは別体にして形成するとともに、前記注出部を前記筒状部材の一端側開口に装着可能に形成し、かつ該開口を前記充填材料の充填口として形成し、
前記充填材料を前記充填口から前記充填室に注入させた後、前記注出部を前記筒状部材の前記開口部に連結するようにしたことを特徴とする吐出器具。 - 前記充填室を形成した筒状部材を着脱可能に収容する本体を設け、かつ該本体と前記注出部とを一体成形によって形成し、前記充填室を前記本体内に収容させて、前記注出部を前記充填口に連結させるようにした請求項1に記載の吐出器具。
- 前記ピストンの押圧時において、前記充填室の容積を弾性力で増大させるよう前記充填室を弾性部材で形成するとともに、前記本体と前記充填室との間に隙間を形成し、
前記ピストンの押圧終了後に、前記充填室の容積を減少させるようにした請求項2に記載の吐出器具。 - 充填材料を充填したストック容器から、請求項1~3の何れか一項に記載の吐出器具の充填室内に、前記ストック容器に形成された押出口を介して圧入される充填材料の充填方法において、
前記ストック容器の押出口に前記充填室の一端側開口を接続し、該開口側にピストンをセットする押出口セット工程と、
前記ストック容器に充填した充填材料を加圧する加圧工程と、
該加圧工程によって前記押出口から押出される充填材料で前記ピストンを後方へ押圧させながら前記充填室に充填材料を充填させる充填工程と、
前記充填室の充填材料の充填後に、充填材料の注出ノズルを備えた注出部を前記充填室の一端側開口に連結させる装着工程とを含む吐出器具への充填材料の充填方法。 - 前記筒状部材の内周面に溝を形成し、該溝は前記ピストンの後退位置にて、筒状部材の他端側から充填室内に至るまで形成されている請求項1~3の何れか一項に記載の吐出器具。
- 前記溝の充填室側の終端部に対応させて、前記筒状部材の内周面に段差を形成し、該段差から前記充填室の一端側開口に至るまでの部分は、前記ピストンが密嵌状態で挿入される内径の縮径部とし、他方、該段差から前記充填室の他端側開口に至るまでの部分は、前記ピストンが緩嵌状態で挿入される内径の拡径部とした請求項5に記載の吐出器具。
- 充填材料を充填したストック容器から、請求項5に記載の吐出器具の充填室内に、前記ストック容器に形成された押出口を介して圧入される充填材料の充填方法において、
前記ストック容器の押出口に前記充填室の一端側開口を接続し、ピストンをその後退位置にセットする押出口セット工程と、
前記ストック容器に充填した充填材料を加圧する加圧工程と、
該加圧工程によって、前記充填室の空気を、筒状部材の内周面に形成した溝から抜きながら、該充填室に充填材料を充填させる充填工程と、
前記充填室の充填材料の充填後に、充填材料の注出ノズルを備えた注出部を前記充填室の一端側開口に連結させる装着工程とを含む吐出器具への充填材料の充填方法。 - 吐出器具として請求項6に記載のものを用い、前記充填工程において、前記充填室の空気を、筒状部材の拡径部における筒状部材の内周面と前記ピストンの外周面との間隙からも抜きながら、該充填室に充填材料を充填する、請求項7記載の吐出器具への充填材料の充填方法。
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