JP4157262B2 - Container for fluid and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container for containing various fluids such as an adhesive, a caulking material, and mayonnaise, and a method for manufacturing the same.
[0002]
[Prior art]
As a conventional container of this type, for example, there is an adhesive cartridge used for a discharge gun. The cartridge includes a cylindrical body made of one or more layers of thin film, a bottom provided at one end of the cylindrical body, a reinforcing cylindrical part provided at the other end of the cylindrical body, and a tip of the reinforcing cylindrical part. And a lid that closes the opening. The lid body has a fitting portion to be fitted to the reinforcing cylinder portion and a flange portion to be fixed to the front end surface of the reinforcing cylinder portion, and after the inside of the cylinder body is filled with the adhesive, the lid is fitted. The joint part is fitted into the reinforcing cylinder part. Thereafter, the flange portion is fixed to the distal end surface of the reinforcing cylinder portion by an ultrasonic fusion method or the like, thereby completing the cartridge (container).
[0003]
[Problems to be solved by the invention]
In the container having the above-described configuration, the pressure in the container is maintained at a positive pressure higher than the external pressure until the flange part is fused after the fitting part of the lid is fitted to the reinforcing cylinder part. Is desirable. This is because if the pressure in the cylinder is equal to or lower than the external pressure, the outside air may enter the inside of the container. However, in the lid, the fitting portion is simply fitted into the reinforcing cylinder portion until the flange portion is fused to the reinforcing cylinder portion. For this reason, even if the pressure in the container is higher than the external air pressure when the lid is fitted to the reinforcing cylinder, the lid is not in the container until the flange is fused to the reinforcing cylinder. It is pushed back to the outside by the pressure of. As a result, the pressure in the container is lowered, and there is a risk that outside air may enter the container.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, a fluid container according to the present invention includes a cylindrical body made of a thin film having one end opened and the other end closed, and a reinforcing cylindrical portion provided in the opening of the cylindrical body. And a lid having a fitting part fitted to the inner periphery of the reinforcing cylinder part and a flange part abutting on the front end surface of the reinforcing cylinder part, and the flange part of the lid body of the reinforcing cylinder part In the fluid container fixed to the distal end surface, the lid body comes out of the reinforcing cylinder portion by engaging with the inner peripheral surface of the reinforcing cylinder portion and the outer peripheral surface of the fitting portion of the lid body. It is characterized in that an engaging portion for preventing movement in the direction is provided. In this case, in a state where the engaging portions are engaged with each other, it is desirable that a positive pressure higher than the external air pressure acts on the fluid accommodated inside the cylindrical body. Further, it is desirable that the flange portion of the lid is fixed to the tip surface of the reinforcing cylinder by an ultrasonic fusion method.
[0005]
Further, in order to solve the above-described problem, a manufacturing method of a fluid container according to the present invention includes a cylindrical body made of a thin film having one end opened and the other end closed, and an opening of the cylindrical body. A reinforced cylinder part, a fitting part fitted to the inner periphery of the reinforced cylinder part, and a lid body having a flange part abutting against the distal end surface of the reinforced cylinder part, and the flange part of the lid body When manufacturing a fluid container fused to the front end surface of the reinforcing cylinder part by an ultrasonic fusion method, the lid body is engaged with the reinforcing cylinder part so as not to move in the direction in which the lid comes out, and In the state where the lid is engaged with the reinforcing cylinder, a positive pressure higher than the external air pressure is applied to the fluid accommodated in the cylinder.
In this case, an annular protrusion having a tapered cross-section is formed on one of the front end surface of the reinforcing cylinder portion and the outer surface of the flange portion ultrasonically fused thereto, and the cross-sectional shape is It is desirable to form a recess having a similar shape and smaller than the protrusion.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 2, the fluid container 1 according to the present invention includes a cylinder 2, a bottom 3, a reinforcing cylinder 4, and a lid 5. Inside the container 1, an adhesive, caulking material, mayonnaise, and other fluids are accommodated. As will be described later, the fluid is accommodated at a positive pressure slightly higher than the external pressure.
[0007]
The cylinder 2 is made of a thin film such as a film, and is formed as a cylinder having both ends opened. The thin film constituting the cylindrical body 2 may be a single layer, but it is desirable to use a laminate of a resin film, a metal foil such as aluminum, etc. from the viewpoints of moisture proofing and air blocking. The cross-sectional shape of the cylindrical body 2 is preferably circular, but may be other shapes. The cylindrical body 2 has a constant diameter over its entire length, but from the bottom 3 side to the reinforcing cylindrical portion 4 side (hereinafter, the bottom 3 side is referred to as a rear end side, and the reinforcing cylindrical portion 4 side is referred to as a distal end side. )) May be formed in a tapered shape that slightly increases in diameter.
[0008]
The bottom 3 is formed by forming a hard resin into a short cylindrical shape with a bottom, and has a circular cross section corresponding to the cross sectional shape of the cylindrical body 2. The bottom portion 3 is fitted to the outer periphery of the rear end portion (right end portion in FIG. 2) of the cylindrical body 2, and is fixed by means such as adhesion. Thereby, while maintaining the shape of the rear-end part of the cylinder 2 circularly, the rear-end opening part of the cylinder 2 is closed. The bottom portion 3 may be fixed to the inner peripheral surface of the rear end portion of the cylindrical body 2. Moreover, you may close the rear-end opening part of the cylinder 2 by binding the said rear-end part with a binding metal fitting.
[0009]
The reinforcing cylinder portion 4 is formed as a cylinder having both ends opened by molding a hard resin, and has a circular cross section corresponding to the cross sectional shape of the cylindrical body 2. The outer periphery of the distal end portion of the cylindrical body 2 is fitted to the inner periphery of the rear end portion (right end portion in FIG. 2) of the reinforcing cylinder portion 4 and is fixed by means such as adhesion. Thereby, the front-end | tip part of the cylinder 2 is maintained circular. Moreover, when holding the container 1, the cylindrical body 2 is prevented from being crushed by gripping the reinforcing cylindrical portion 4. The reinforcing cylinder portion 4 may be fixed to the inner periphery of the tip end portion of the cylinder body 2.
[0010]
As shown in FIG. 3, a locking recess (engagement portion) 41 that extends annularly along the circumferential direction of the reinforcement cylinder portion 4 is formed in an intermediate portion that contacts the cylinder body 2 on the inner peripheral surface of the reinforcement cylinder portion 4. Has been. Both side surfaces of the locking recess 41 have an arc shape with a quadrant of a cross section, but may be a flat surface orthogonal to the axis of the reinforcing cylinder portion 4 or an oblique tapered surface. The width of the locking recess 41 (the length of the reinforcing cylinder portion 4 in the axial direction) is slightly longer than the diameter of the arc that constitutes both side surfaces thereof.
[0011]
A concave portion 43 that extends annularly along the circumferential direction of the reinforcing cylinder portion 4 is formed on the distal end surface (left end surface in FIG. 3) 42 of the reinforcing cylinder portion 4. The concave portion 43 is used when the lid 5 is fused to the distal end surface 42 of the reinforcing cylinder portion 4 by an ultrasonic fusion method. Therefore, the concave portion 43 disappears after the lid 5 is fused to the reinforcing cylinder portion 4 and the container 1 is completed. The recess 43 is formed in a triangular cross section, but may be formed in a trapezoidal cross section or a semicircular shape.
[0012]
As shown in FIG. 3, the lid 5 has a fitting cylinder part (fitting part) 51 whose length is slightly shorter than that of the reinforcing cylinder part 4, and one end part (right end part in FIG. 3) of the fitting cylinder part 51. The lid portion 52 is formed on the outer peripheral surface of the fitting cylinder portion 51 and the annular flange portion 53 is formed on the outer peripheral surface of the other end portion of the fitting cylinder portion 51.
[0013]
The outer diameter of the fitting cylinder part 51 is equal to or slightly larger than the inner diameter of the reinforcing cylinder part 4. Therefore, the fitting cylinder part 51 is press-fitted into the inner peripheral surface of the reinforcing cylinder part 4. In particular, since the end of the fitting cylinder 51 on the lid 52 side is press-fitted into the reinforcing cylinder 4 via the cylinder 2, it is pressed into the cylinder 2 with a strong pressure. Thereby, between the outer peripheral surface of the fitting cylinder part 51 and the inner peripheral surface of the cylinder 2 is a substantially airtight state. When the cylindrical body 2 is fixed to the outer periphery of the reinforcing cylinder portion 4, the fitting is performed so that the space between the outer peripheral surface of the fitting cylindrical portion 51 and the inner peripheral surface of the reinforcing cylinder portion 4 is sealed in an almost airtight state. It is preferable to press-fit the combined cylinder part 51 into the reinforcing cylinder part 4.
[0014]
An engaging protrusion (engaging portion) 51 a extending in an annular shape along the circumferential direction of the fitting cylinder portion 51 is formed at an intermediate portion of the outer peripheral surface of the fitting cylinder portion 51. The engaging protrusion 51 a has a semicircular cross section, and the radius of curvature thereof is substantially the same as the radius of curvature of the arc that forms both side surfaces of the engaging recess 41. Therefore, the length of the engaging protrusion 51 a (= the diameter of the engaging protrusion 51 a) in the axial direction of the reinforcing cylinder 4 is slightly shorter than the width of the engaging recess 41. When the engagement protrusion 51a comes into contact with the side surface on the distal end side of the engagement recess 41, the flange portion 53 is slightly separated from the distal end surface 42 of the reinforcing tube portion 4, and as shown in FIG. When it contacts 42, it arrange | positions so that it may touch the side surface of the rear-end side of the engagement recessed part 41, or may leave | separate a little to the front end side. When the side surface of the engagement concave portion 41 is a plane perpendicular to the axis of the reinforcing cylinder portion 4, the engagement protrusion 51 a may have a quadrangular cross section, and the side surface of the engagement concave portion 41 is the axis of the reinforcing cylinder portion 4. In the case of a tapered surface obliquely crossing with each other, it may be trapezoidal in cross section.
[0015]
The flange portion 53 has substantially the same outer diameter as the outer diameter of the reinforcing cylinder portion 4, and a rear end face 54 facing the front end face 42 of the reinforcing cylinder portion 4 is fixed to the front end face 42. In particular, in this embodiment, fusion is performed by an ultrasonic fusion method. As shown in FIGS. 3 and 4, a protrusion 55 extending annularly along the flange portion 53 is formed on the rear end surface 54 of the flange portion 53 before the fusion, in order to perform the fusion by the ultrasonic fusion method. ing. The protrusion 55 is disposed on the same circumference as the recess 43. Further, the cross-sectional shape of the protrusion 55 is similar to that of the concave portion 43, and is slightly larger than the concave portion 43. Therefore, as shown in FIG. 4, even if the front end portion of the protrusion 55 is fitted into the entire recess 43, there is a slight gap between the rear end surface 54 of the flange portion 53 and the front end surface 42 of the reinforcing cylinder portion 4. Arise. Further, in this state, the engagement protrusion 51a is substantially in contact with the side surface on the distal end side of the engagement recess 41. At the time of ultrasonic fusion between the flange portion 53 and the reinforcing cylinder portion 4, the projection 55 is melted and the contact surface portion of the recess 43 with the projection 55 is melted. The flange portion 53 is fixed to the reinforcing cylinder portion 4 by the solidification of the molten resin. Thereby, the completed container 1 is formed. As shown in FIGS. 1 and 2, in the completed container 1, the rear end surface 54 of the flange portion 53 is in contact with the front end surface 42 of the reinforcing cylinder portion 4.
[0016]
When manufacturing the said container 1, ie, manufacturing the container 1 with which fluids, such as an adhesive agent, were filled, the cover body 5 is removed from the reinforcement cylinder part 4, as shown in FIG. Of course, the bottom part 3 and the reinforcement cylinder part 4 are attached to the cylinder 2. Then, the fluid is filled into the cylinder 2 from the opening of the reinforcing cylinder 4. In this case, the cylindrical body 2 is erected with the reinforcing cylindrical portion 4 facing upward so that the filled fluid does not exit from the opening of the reinforcing cylindrical portion 4.
[0017]
Next, the fitting cylinder part 51 of the lid 5 is press-fitted into the reinforcement cylinder part 4 to close the opening of the reinforcement cylinder part 4. The fitting cylinder portion 51 is press-fitted until the engaging protrusion 51 a is fitted into the locking recess 41. In this state, the fluid filled in the cylindrical body 2 is pushed by the lid portion 52 of the lid body 5 and becomes a predetermined positive pressure higher than the external air pressure. Due to this positive pressure, the thin film constituting the cylindrical body 2 is elastically extended. In addition, the filling amount of the fluid to be filled in the cylindrical body 2 is determined in advance so that the inside of the cylindrical body 2 becomes a predetermined positive pressure when the lid body 5 is press-fitted into the reinforcing cylindrical portion 4.
[0018]
When the pressing force on the lid body 5 is released, the lid body 5 is pushed back to the distal end side by the pressure in the cylindrical body 2. However, when the lid 5 tries to return to the distal end side, the engaging protrusion 51 a engages with the side surface on the distal end side of the locking recess 41. As a result, the lid 5 cannot move to the tip side. Therefore, the inside of the cylinder 2 maintains a positive pressure state higher than the external air pressure. Therefore, until the flange portion 43 of the lid body 5 is ultrasonically fused to the reinforcing cylinder portion 4, the outer peripheral surface of the fitting cylinder portion 51 of the lid body 5, the inner peripheral surface of the reinforcing cylinder portion 4, and the cylindrical body The outside air does not enter the cylindrical body 2 from between the two inner peripheral surfaces.
[0019]
Next, the lid body 5 is ultrasonically vibrated in the axial direction of the cylindrical body 2. Then, the protrusion 55 is melted and the contact surface portion of the recess 43 with the protrusion 55 is melted. When the projection 55 is melted, the flange portion 53 approaches the distal end surface 42 of the reinforcing tube portion 4 and the interval therebetween becomes narrow. As a result, the molten resin in the protrusion 55 and the concave portion 43 spreads between the front end surface 42 of the reinforcing cylinder portion 4 and the rear end surface 54 of the flange portion 53. When the entire projection 55 is melted, the ultrasonic vibration with respect to the lid 5 is stopped. Then, the molten resin is solidified, and the rear end surface 54 of the flange portion 53 is fixed to the front end surface 42 of the reinforcing cylinder portion 4. As a result, the container 1 in which the fluid is accommodated in a positive pressure state higher than the external pressure is completed.
Note that when the flange portion 53 moves closer to the reinforcing cylinder portion 4, the engaging protrusion 51 a moves by the moving distance, but before the flange portion 53 contacts the reinforcing cylinder portion 4, the engaging protrusion 51 a There is no contact with the side surface on the rear end side of the locking recess 41.
[0020]
In the fluid container 1 and the manufacturing method thereof according to the present invention, the lid 5 is prevented from being pushed back by the pressure in the cylindrical body 2 by engaging the engagement protrusion 51 a with the locking recess 41. Therefore, the pressure of the fluid accommodated in the cylinder 2 can be maintained at a positive pressure higher than the external pressure. Therefore, it is possible to reliably prevent the outside air from entering the cylinder body 2 after the reinforcing cylinder portion 4 is closed and the lid body 5 is ultrasonically fused.
[0021]
In addition, this invention is not limited to said embodiment, It can change suitably.
For example, in the above embodiment, the flange portion 53 of the lid 5 is fixed to the distal end surface 42 of the reinforcing cylinder portion 4 by the ultrasonic fusion method, but other fixing means such as a hot melt adhesive is used. It may be fixed.
Further, in the above embodiment, the locking recess 41 is formed on the inner peripheral surface of the reinforcing cylindrical portion 4, and the engaging protrusion 51 a is formed on the outer peripheral surface of the fitting cylindrical portion 51 of the lid 5. On the contrary, an engaging protrusion may be formed on the inner peripheral surface of the reinforcing tube portion 4, and a locking recess may be formed on the outer peripheral surface of the fitting tube portion 51. The same applies to the relationship between the concave portion 43 and the projection 55, and the concave portion 43 may be formed on the rear end surface 54 of the flange portion 53, and the projection 55 may be formed on the distal end surface 42 of the reinforcing cylinder portion 4.
Furthermore, in the above-described embodiment, the cylindrical portion 2 is inserted and fixed from the engagement concave portion 41 of the reinforcing cylindrical portion 4 to the inner peripheral surface on the rear end side, but is inserted into the entire inner peripheral surface of the reinforcing cylindrical portion 4. It may be fixed. In that case, the cylindrical portion 2 is also fixed to the bottom surface that defines the engaging recess 41. Therefore, the engagement protrusion 51 a is engaged with the engagement recess 41 via the film body constituting the cylinder portion 2. The cylindrical part 2 can be fixed to the reinforcing cylindrical part 4 by adopting a so-called insert molding method in which a resin is injected into a mold on which the cylindrical part 2 is mounted to mold the reinforcing cylindrical part 4.
[0022]
【The invention's effect】
As described above, according to the present invention, the outside air is prevented from entering the container containing the fluid such as the adhesive between the time when the lid is fitted to the reinforcing cylinder and the time when the lid is fixed. The effect that it can do is acquired.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view showing a main part of an embodiment of a fluid container according to the present invention.
FIG. 2 is a cross-sectional view in which a part of the embodiment is omitted.
FIG. 3 is a view for explaining the method for manufacturing the fluid container according to the embodiment, and is a cross-sectional view showing a state before the lid body is press-fitted into the reinforcing cylinder portion.
FIG. 4 is a cross-sectional view showing a state after a lid is press-fitted into a reinforcing cylinder part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fluid container 2 Cylinder 4 Reinforcing cylinder part 5 Lid 41 Locking recessed part (engagement part)
42 Front end surface 43 (of the reinforcing tube portion) (Fusing) Concave portion 51 Fitting tube portion (fitting portion)
51a Engagement protrusion (engagement part)
53 Flange portion 54 Rear end surface (outer surface of the flange portion facing the front end surface)
55 (fusion) protrusion

Claims (5)

A cylindrical body made of a thin film having an open front end and a closed rear end, a reinforcing cylindrical part provided in the opening of the cylindrical body, a fitting part fitted to the inner periphery of the reinforcing cylindrical part, and the above A fluid container comprising: a lid body having a flange portion that comes into contact with the distal end surface of the reinforcing cylinder portion; and the flange portion of the lid body fixed to the distal end surface of the reinforcing cylinder portion.
An engagement recess is formed on one of the inner peripheral surface of the reinforcing cylinder portion and the outer peripheral surface of the fitting portion of the lid , and the other is fitted into the engagement recess, and on the tip side of the engagement recess Forming an engagement convex portion that prevents the fitting portion from coming out of the reinforcing cylinder portion by striking a side surface;
The width of the engagement concave portion in the axial direction of the reinforcing cylinder portion is made larger than the width of the engagement convex portion so that the engagement convex portion can move in the axial direction of the reinforcing cylinder portion in the engagement concave portion. Widen
In a state where the flange portion is separated from the front end surface of the reinforcing cylindrical portion, the engaging convex portion hits the side surface on the front end side of the engaging concave portion, and the flange portion hits the front end surface of the reinforcing cylindrical portion Then, the said engaging convex part has been arrange | positioned so that the said engaging convex part may be located in the intermediate part of the said engaging concave part, and may space apart from the both sides | surfaces of the said engaging concave part . 2. The fluid according to claim 1, wherein a positive pressure higher than an external air pressure is applied to the fluid accommodated inside the cylindrical body in a state in which the engaging portions are engaged with each other. container. 3. The fluid container according to claim 1, wherein a flange portion of the lid is fixed to a front end surface of the reinforcing cylinder by an ultrasonic fusion method. A cylindrical body made of a thin film having an open front end and a closed rear end, a reinforcing cylindrical part provided in the opening of the cylindrical body, a fitting part fitted to the inner periphery of the reinforcing cylindrical part, and the above And a lid having a flange portion that comes into contact with the distal end surface of the reinforcing cylinder portion, and manufacturing a fluid container in which the flange portion of the lid body is fused to the distal end surface of the reinforcing cylinder portion by an ultrasonic fusion method. When doing
An engagement concave portion is formed on one of the inner peripheral surface of the reinforcing cylinder portion and the outer peripheral surface of the fitting portion of the lid, and an engagement convex portion that fits into the engagement concave portion is formed on the other,
The width of the engagement concave portion in the axial direction of the reinforcing cylinder portion is made larger than the width of the engagement convex portion so that the engagement convex portion can move in the axial direction of the reinforcing cylinder portion in the engagement concave portion. Widen
In a state where the flange portion is separated from the front end surface of the reinforcing cylindrical portion, the engaging convex portion hits the side surface on the front end side of the engaging concave portion, and the flange portion hits the front end surface of the reinforcing cylindrical portion Then, the engagement convex portion is disposed so that the engagement convex portion is located in the middle portion of the engagement concave portion and separated from both side surfaces of the engagement concave portion,
By fitting the fitting portion of the lid body to the reinforcing cylinder portion, a positive pressure higher than the external air pressure is applied to the fluid accommodated in the cylinder body, and the engagement convex portion is caused by the positive pressure. The fitting part is abutted against the side surface on the tip side to prevent the fitting part from coming out of the reinforcing cylinder part, and the cylinder is maintained at a positive pressure, and the flange part is reinforced in this state. A method for producing a fluid container, characterized by ultrasonic welding to a tip surface of a cylindrical portion . An annular projection having a tapered cross section is formed on one of the front end surface of the reinforcing cylinder portion and the outer surface of the flange portion ultrasonically fused thereto, and the sectional shape is similar to the projection on the other. 5. A method for producing a fluid container according to claim 4, wherein a recess smaller than the protrusion is formed.

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