JPH0858854A - Sealant-extruding container - Google Patents

Abstract

PURPOSE: To provide a sealant-extruding container of which the outflow tube is assuredly integrated with a top lid, and does not generate an idle turn or drop even when a strong torque is applied, and also has a favorable sealability. CONSTITUTION: A top lid 4 has a deformed part 401 for locking at the edge of an opening 40. Then, an internal diametrical area 400 including the opening 40 is wrapped by a cylindrical thicker part 500 which is located directly above a flange 51 of an outflow tube made of a synthetic res in.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to sealant extrusion containers.

[0002]

2. Description of the Related Art In a sealant container, a plunger is fitted inside the lower end of a paper cylinder,
A cartridge structure in which a metal plate canopy is fixed to the upper end of the paper cylinder and an outflow pipe made of synthetic resin having a male screw on the outer periphery is fitted in the center of the canopy is the actual open sho 60-60337.
It is known in the publication. However, in this prior art, since the opening on the inner diameter side of the canopy is only fitted to the outer diameter portion of the base portion of the outflow pipe, the integrity of the canopy and the outflow pipe is insufficient. For this reason, when the cap screwed into the male thread of the outflow pipe is accidentally turned to the tightening side or when the amount of sealant outflow is insufficient, the cap must be removed to the side to break through the inner seal again. When rotated
When a strong torque acts on the outflow pipe (the sealant is attached to the screw part), it spins idle against the canopy, which easily causes a problem that the cap cannot be removed. Further, when the outflow pipe is axially shocked, the holding force is weak, and there is a risk that the outflow pipe may drop into the container through the opening of the canopy. Further, as described above, since the canopy and the outflow pipe are simply fitted, there is a problem that the airtightness of this portion is poor.

In Japanese Utility Model Application Laid-Open No. 5-54348, a flange is formed at the lower end of an outflow pipe, an opening of a canopy is externally fitted to the base of this flange, and an upper surface of the flange and a lower surface of the canopy are bonded with an adhesive. A structure has been proposed. However, as described above, this prior art also solves the problem that when a strong torque acts on the outflow pipe, the adhesive surface is destroyed and the outflow pipe idles, or the outflow pipe easily falls into the container due to the axial pressing force. There wasn't. Further, in this prior art, the inner seal for sealing the passage hole of the outflow pipe is joined only to the lower surface of the flange. For this reason, when the outflow pipe idles due to the torque, a gap is formed between the outer periphery of the outflow pipe and the canopy fitting portion, and there is a problem that outside air enters through the gap and the sealant filled inside is cured.

The present invention was devised in order to solve the above-mentioned problems, and its purpose is to ensure that the outflow pipe is integrated with the canopy so that even when a strong torque is applied, it runs freely. Another object of the present invention is to provide a sealant extruding container which does not drop or drop and has good sealing property.

[0005]

In order to achieve the above-mentioned object, the present invention is to fix a canopy having a synthetic resin outflow tube at the center to the upper end of a paper cylinder cylinder having a barrier lining on the inner surface thereof. In a sealant container in which a plunger is slidably fitted in the lower end of the body, the canopy has a deformed portion at the edge of the opening to prevent rotation, and the inner diameter area including the opening is directly above the flange of the synthetic resin outflow pipe. It is configured to be embedded in the thick wall portion of the cylinder. The non-rotating deformed portion may be a straight surface or may be a notch protruding in the radial direction. In order to improve the sealing property on the outer diameter side, preferably, an inner seal having a synthetic resin layer laminated on both sides of an aluminum foil is arranged over the synthetic resin outflow pipe and the lower surface of the canopy,
The outer peripheral portions of the canopy and the inner seal are respectively formed with rising surrounding walls, the rising surrounding walls are joined to each other, and the rising surrounding wall of the inner seal is joined to the barrier lining of the paper cylinder.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention. Reference numeral 1 is a paper cylinder, and a barrier lining 2 composed of an aluminum foil 2b and a synthetic resin layer 2c is provided on the inner surface of a paperboard 1a composed of a plurality of layers with a synthetic resin layer 2a interposed therebetween.
Reference numeral 3 denotes a ceiling body, which includes a metal plate canopy 4, a synthetic resin outflow pipe 5 and an inner seal 6. The metal plate canopy 4 and the synthetic resin outflow pipe 5 are integrated by insert molding. ing. The inner seal 6 is joined to the inner surface side of the rising surrounding wall 61 on the outer diameter side with the inner surface of the rising surrounding wall 41 of the canopy 4, and the outer surface side of the rising surrounding wall 61 is the paper cylinder 1
It is joined to the barrier lining 2. Then, the canopy 4 has an annular outer wall 45 which extends the rising surrounding wall 41 and descends.
Is fastened by winding so as to cover the upper end of the paper tube cylinder 1. Reference numeral 8 denotes a plunger which is fitted into the lower end of the paper cylinder 1 after the sealant is filled. The synthetic resin outflow pipe 5 integrally has a flange 51 of a required size at the lower end of the tubular portion 50, a passage hole 52 is formed in the tubular portion 50, and a cone nozzle 7 is screwed on the outer periphery. A male screw 53 is formed.

As shown in FIG. 2, the inner seal 6 has synthetic resin layers 6b and 6c laminated on both sides of an aluminum foil 6a.
The inner seal 6 is formed of a disc-shaped piece, and a rising surrounding wall 61 is integrally formed on the outer diameter side of the face plate portion by drawing. The inside diameter of the rising surrounding wall 61 is the same as the outside diameter of the rising surrounding wall 41 of the canopy 4, and the outside diameter is the same as the inside diameter of the paper cylinder 1. In the present invention, a thermoplastic resin such as polyethylene or polypropylene is used as the synthetic resin as the layer material or the molding material for the outflow pipe. Further, in the present invention, the term “bonding” means fusion (or welding) unless otherwise specified.

The canopy 4 has a bent step portion 42 at a portion corresponding to the outer peripheral end surface of the flange of the synthetic resin outflow pipe 5, and the lower surface of the face plate portion on the outer diameter side of the bent step portion 42 is the flange 5.
1 is aligned with the lower surface. The canopy 4 has an opening 40 on the inner diameter side that is smaller than the outer diameter D of the male screw 53 of the synthetic resin outflow pipe 5. Then, the inner diameter portion 400 including the opening 40 deeply penetrates into the intermediate region of the base thick portion 500 of the protruding cylindrical portion 50, and the upper and lower surfaces and the opening surface of the inner diameter portion 400 are changed from the liquid phase to the solid phase. It is bonded to resin. Further, the bent step portion 42 and the face plate portion on the inner diameter side of the bent step portion 42 are joined to the upper surface of the flange 51. And
As shown in FIG. 3, the opening 40 has a deformed portion 401 for preventing rotation from being provided at the edge portion. The deformed portion has a linear surface in the first embodiment, and the linear surface may be one place,
Preferably, it is provided in parallel at a plurality of positions, for example, at 180-degree symmetrical positions.

In the state in which the synthetic resin outflow pipe 5 is integrated, the canopy 4 has the rising surrounding wall 41 extending outward in the form of a flange as shown in FIG. 4, and in this state, the inner seal 6 is fitted on the outside. The above-mentioned ceiling body 3 is constituted by. That is, the upper surface of the face plate portion of the inner seal 6 overlaps the lower surface of the flange and the lower surface of the face plate portion in the aligned state, and the rising surrounding wall 41 has the rising surrounding wall 6 of the inner seal 6 overlapped.
1 is polymerized. In this case, the rising enclosure wall 61 of the inner seal 6 is made to facilitate the assembly if necessary.
Alternatively, a hot melt resin may be applied to the inner surface of the above and joined to the rising surrounding wall 41 of the canopy 4. The ceiling body 3 thus assembled is fitted in the upper end portion of the paper cylinder 1 with the rising surrounding walls 41 and 61, and in this state, the portion of the canopy 4 extending outward from the rising surrounding wall 41 is bent. As a result, the annular outer wall 45 is formed and is wound around the outer circumference of the paper cylinder body, whereby the canopy 4 is fixed to the paper cylinder body 1. And
The canopy rising surrounding wall 41 and the inner seal rising surrounding wall 61 in a superposed state are heated by a hot air method or a high frequency induction method, whereby the compatible rising walls 41 and 61 and these and the inner surface of the paper cylinder 1 are hermetically joined. It Specifically, as shown in FIG. 2, the synthetic resin layer 6 c ′ on the outer surface side of the inner seal rising wall 61 is fused with the synthetic resin layer 2 c of the paper cylinder 1, and the outer surface of the canopy rising wall 41 is the inner surface of the inner seal rising wall 61. It is fused with the synthetic resin layer 6b 'on the side.

The inner seal 6 is a rising wall 61.
It is indispensable to be joined to the canopy rising surrounding wall 41 and the paper cylinder 1, but the regions other than the rising surrounding wall 61 do not necessarily have to be joined. That is, the inner seal face plate portion may be in contact with the lower surface of the flange of the synthetic resin outflow pipe 5, or may be in contact with all or most of the lower surface of the canopy face plate portion in addition to the lower surface of the flange.
The term “most part” means that the region from the base end of the canopy rising surrounding wall 41 of the canopy 4 to the start end of the face plate portion is excluded. By adopting this configuration, the inner seal 6 can function as a diaphragm valve against internal pressure fluctuations. However, when the sealant has a property of less expansion and contraction due to heat, the face plate portion of the inner seal 6 may be joined to at least the lower surface of the flange, or further, all or most of the lower surface of the canopy face plate portion.

5 to 7 show another embodiment of the present invention. These embodiments have the same basic structure as the first embodiment, and the inner diameter portion 400 including the opening 40 of the canopy 4 is deeply embedded even in the intermediate region of the base thick portion 500 of the tubular portion 50, and the inner diameter portion 400. The upper and lower surfaces and the opening surface are joined to the base constituent resin. Further, the bent step portion 42 and the face plate portion on the inner diameter side of the bent step portion 42 are joined to the upper surface of the flange 51. However, in these examples, the non-rotating modified portion 401
Is not a straight surface as in the first embodiment, but is composed of a plurality of notches (or recesses) protruding in the radial direction of the opening 40. In FIG. 5, two notches are provided at 180-degree symmetrical positions, in FIG. 6, three are provided at equal intervals, and in FIG. 7, four are provided at equal intervals. The shape of the notch is not limited,
The shape is not limited to the arc shape as shown, but may be a polygonal shape such as a triangular shape. In some cases, instead of the notch, a protrusion projecting inward of the opening may be used, but this is not so preferable because it may be necessary to increase the thickness of the tubular portion by that amount. In any of the embodiments, it is also preferable that the upper surface and / or the lower surface of the face plate inner diameter portion 400 embedded in the tubular portion 50 be provided with irregularities as necessary to increase the surface area.

In order to obtain the integrated structure of the canopy 4 and the synthetic resin outflow pipe 5 in each of the above-described embodiments, the opening 40 of the canopy 4 is made smaller than the outer diameter of the male screw 53 of the synthetic resin outflow pipe 5. As shown schematically in FIG. 8, the canopy 4 is made, and is placed directly above the cavity of the synthetic resin outflow pipe molding die 9, especially the cavity portion 90 for the flange. You just have to inject it. In this way, the face plate portion and the bent step portion 42 are welded to the molded flange 51, and the opening 40 projects into the cavity region for the protruding tubular portion, so that the inflowing synthetic resin forms the tubular portion 50 at the same time. The inner diameter portion 400 is embedded in the intermediate thickness portion of the base portion.

The paper cylinder body 1 is a spiral paper cylinder, that is, an inner-layer paper quality tape composed of a composite of a barrier lining 2 and one or more layers of middle-layer paper quality tape and outer-layer paper quality tape are spirally wound with an adhesive. What was made by doing is suitable. The inner-layer paper-made tape used is one in which one edge in the width direction is folded back including the lining 2, and the folded-back portion is fused and overlapped with the lining surface without folding at each turn. Further, the intermediate paper quality tape is wound with the widthwise edges thereof abutting each other. Since the inner-layer paper-based tape is in the form of digging into the intermediate paper-based tape, there is no step inside the paper cylinder. It is preferable that the outer paper tape is wound so that the widthwise edges thereof wrap each other from the viewpoint of improving the strength. In the embodiment, the synthetic resin outflow pipe 5 has the passage hole opened at the upper end, but the present invention is not limited to this, and the upper end of the protruding tubular portion 50 may be closed by an integral lid portion.

[0014]

Operation of the Embodiment Next, the operation of the embodiment will be described. The container according to the present invention is filled with the sealant A from the opening at the lower end of the paper cylinder 1, and the plunger 8 is fitted and inserted therein to sealably accommodate the sealant A. At the time of use, the cone nozzle 7 is removed from the tubular portion 50 of the synthetic resin outflow pipe 5, the rod-shaped body is inserted into the outflow hole, the inner seal 6 is pierced, and the extrusion gun acts on the plunger 8 to outflow the sealant A. It is pushed out from the hole 52. Therefore, the ceiling part is required to withstand the force in the releasing direction due to the internal pressure of the sealant extruding, and the sealant A has a property of hardening by reacting with moisture, oxygen and ultraviolet rays, and thus has high airtightness. Need to be In the present invention, not only the face plate portion of the canopy 4 is joined to the upper surface of the flange, but also the bent step portion 42 in the middle of the face plate portion is joined to the flange end surface, and the inner diameter portion 400 of the face plate portion is located immediately above the flange. The upper and lower surfaces and the end face are deeply embedded in the thick wall portion 500 and are joined to the thick wall portion 500.
Further, the rising surrounding wall 61 on the outer diameter side of the inner seal 6
Is joined to the barrier lining 2 of the paper cylinder 1 while being joined to the rising surrounding wall 41 of the canopy 4 in a laminated manner. With these configurations, the bonding strength in the inner diameter region and the outer diameter region of the ceiling portion can be made extremely high. Further, since the opening 40 of the canopy 4 is deeply embedded in the thick wall portion 500 of the tubular portion directly above the flange of the synthetic resin outflow pipe 5, the cone nozzle 7
There is no concern that the inner edge of the lower end of the cone nozzle may catch on the opening edge of the canopy and be damaged when it is rotated. Therefore, it is possible to secure stable ceiling strength that can sufficiently withstand the sealant extrusion internal pressure.

On the other hand, as for the airtightness, since the inner diameter portion 400 of the canopy 4 is deeply embedded in the thick wall portion 500 of the synthetic resin outflow pipe 5 just above the flange as described above,
The sealing ability between the canopy 4 and the synthetic resin outflow pipe 5 is excellent. Also, the inner seal 6 does not end at the canopy face plate portion,
There is a rising surrounding wall 61 on the outer diameter side, and the inner surface of the rising surrounding wall 61 is joined to the outer surface of the rising surrounding wall 41 of the canopy 4,
Furthermore, the outer surface of the rising surrounding wall 61 is joined to the barrier lining 2 on the inner surface of the paper cylinder 1. Due to such a multi-joint structure, the airtightness of the outer diameter region of the ceiling portion becomes extremely good.

Further, even when the cone nozzle 7 is roughly rotated to the tightening side during use and the strong torque acts on the synthetic resin outflow pipe 5, the inner diameter portion 400 of the canopy 4 is made of the synthetic resin outflow pipe. Thick wall portion 500 directly above the flange of No. 5
Is deeply embedded and has a profile 401 at the edge of the opening 40, which acts like a wedge against rotation. Therefore, the wide joint area and the mechanical detent function synergize with each other, so that the synthetic resin outflow pipe 5 can be completely prevented from idling. In addition, after the extrusion is started once, if the sealant is not discharged well due to the poor opening of the inner seal, it is necessary to remove the cone nozzle 7 from the synthetic resin outflow pipe 5 to widen the opening hole. In this state, the synthetic resin outflow pipe 5 is often used.
The sealant is attached to the male screw portion 53, the adhesive force acts as a resistance, and the cone nozzle 7 is less likely to rotate to the loose side, and a strong torque acts on the synthetic resin outflow pipe 5 as well. At this time as well, because of the above structure, the synthetic resin outflow pipe 5
Never spins. Further, even when the synthetic resin outflow pipe 5 is pressed down by an external force, the inner diameter portion 400 of the canopy 4 has a cylindrical wall thickness portion 500 immediately above the flange of the synthetic resin outflow pipe 5.
Since it is deeply embedded like a brim and receives an axial load, the synthetic resin outflow pipe 5 is never detached from the canopy 4 and dropped into the container, or is not pulled out from the canopy at all. In addition, the rising wall 6 of the inner seal 6
Since 1 is joined to the rising surrounding wall 41 of the canopy 4, the inner seal 6 does not come off. Therefore, perfect airtightness is obtained, and infiltration of moisture, oxygen, ultraviolet rays and the like is completely blocked during storage up to the time of use and during use, and the sealant does not harden.

When the inner seal 6 is not joined to the flange 51 of the synthetic resin outflow pipe 5 or the face plate portion of the canopy 4, the sealant A is exposed to the external temperature.
Even if the inner pressure of the container changes due to expansion or contraction of the inner seal 6, the inner seal 6 is displaced like a diaphragm valve according to the inner pressure, so that the inner seal 6 can be accurately followed.
And in this case also, the inner seal 6 rises up to the surrounding wall 61.
Is joined to the rising surrounding wall 41 of the canopy 4 and also to the barrier lining 2 of the paper cylinder 1,
Good airtightness is maintained. The inner seal 6 is attached to the flange 51 of the synthetic resin outflow pipe 5 or the canopy 4 further.
When it is joined to the face plate portion, the airtightness of the joining region between the outflow pipe 5 and the canopy 4 can be increased.

[0018]

According to the first aspect of the present invention described above, the inner diameter portion 400 of the canopy 4 is embedded in the thick wall portion 500 of the synthetic resin outflow pipe 5 immediately above the flange, and the canopy opening 40 is provided. Since the deformed portion 401 is provided at the edge portion of the above, the synthetic resin outflow pipe 5 and the canopy 4 can be completely integrated, which improves the airtightness and the strength on the inner diameter side of the ceiling portion. At the same time, it is possible to obtain an excellent effect that the synthetic resin outflow pipe 5 does not idle even when a strong torque acts, and the synthetic resin outflow pipe 5 cannot be removed even by an external force in the axial direction. Moreover, since the canopy 4 and the synthetic resin outflow pipe 5 are joined at the time of molding the synthetic resin outflow pipe 5, the man-hours can be reduced and the cost can be reduced. According to claim 2, the synthetic resin layer 6b is formed on both surfaces of the aluminum foil 6a,
6 c of laminated inner seal 6 and the outer diameter of the canopy 4 are formed with rising surrounding walls 41 and 61, respectively, and these rising surrounding walls 41 and 61 are joined to each other and to the barrier lining 2 at the upper end of the paper cylinder. Therefore, it is possible to obtain stable strength and high airtightness that endure the force in the direction of separation due to the internal pressure, and it is possible to provide a highly practical sealant extrusion container together with the effect according to claim 1. Is obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a ceiling portion in FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is a partially cutaway perspective view of a ceiling body according to the present invention.

FIG. 5 is a partial cutaway cross-sectional view showing another embodiment of the present invention.

FIG. 6 is a partial plan view of a canopy showing another embodiment of the present invention.

FIG. 7 is a partial plan view of a canopy showing another embodiment of the present invention.

FIG. 8 is a half cross-sectional view schematically showing a mold for molding the outflow pipe and integrating it with the canopy according to the present invention.

[Explanation of symbols]

 1 Paper cylinder body 2 Barrier lining 3 Ceiling part body 4 Canopy 5 Synthetic resin outflow pipe 6 Inner seal 6a Aluminum foil 6b, 6c Synthetic resin layer 40 Opening 41 Standing surrounding wall 51 Flange 61 Standing surrounding wall 400 Inner diameter portion 401 Deformed portion 500 Cylinder Part thick part

Claims (4)

[Claims] 1. A canopy having a synthetic resin outflow tube at the center is fixed to the upper end of a paper cylinder having a barrier lining on its inner surface, and a plunger is slidably fitted into the lower end of the paper cylinder. In the sealant container described above, the canopy 4 has a deformed portion 401 for preventing rotation at the edge of the opening 40, and the inner diameter region 400 including the opening 40 is formed in the thick wall portion 500 of the cylindrical portion directly above the flange of the synthetic resin outflow pipe 5. A sealant extruding container characterized by being embedded. 2. Synthetic resin layers 6b and 6 on both sides of the aluminum foil 6a.
The inner seal 6 in which c is laminated is arranged over the lower surface of the synthetic resin outflow pipe 5 and the canopy 4, and the rising walls 41 and 61 are formed on the outer diameter portions of the canopy 4 and the inner seal 6, respectively. The sealant extruding container according to claim 1, including one in which 61 is joined to each other and the rising surrounding wall 61 of the inner seal 6 is joined to the barrier lining 2 of the paper cylinder 1. 3. The sealant extruding container according to claim 1, wherein the non-rotating deformed portion 401 has a straight surface. 4. The sealant extruding container according to claim 1, wherein the non-rotating deformed portion 401 comprises a notch protruding in the radial direction.