JP2756645B2 - Sealant extrusion container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealant extruder.

[0002]

2. Description of the Related Art In a sealant container, a plunger is fitted inside the lower end of a paper cylinder,
The cartridge structure in which a metal plate canopy is fixed to the upper end portion of the paper cylinder 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 disclosed in Japanese Utility Model Application Publication No. 60-13337.
It is known in the publication. However, in this prior art, since the inner diameter side opening of the canopy is merely fitted to the base outer diameter portion of the outflow tube, the integration between the canopy and the outflow tube is insufficient. For this reason, when the cap screwed into the male screw of the outflow pipe is accidentally turned to the tightening side, or when the amount of outflow of the sealant is insufficient, remove the cap to break through the inner seal again and remove it to the removal side. When turned
When a strong torque acts on the outflow pipe (the sealant is attached to the threaded portion), the canopy spins off against the canopy, which easily causes a problem that the cap cannot be removed. Also, when the outflow pipe is impacted in the axial direction, the holding force is weak, and there is a risk that the outflow pipe falls into the container through the opening of the canopy. Furthermore, since the canopy and the outflow pipe are merely fitted as described above, there is a problem that the airtightness of this portion is poor.

In Japanese Utility Model Laid-Open No. 5-54348, a flange is formed at a lower end of an outflow pipe, an opening of a canopy is fitted to a base of the 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, this prior art can also solve the problem that when a strong torque acts on the outflow pipe as described above, the adhesive surface is broken and the outflow pipe runs idle, or the outflow pipe easily falls into the container due to the axial pressing force. Did not. Further, in this prior art, an 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 runs idle due to the torque, a gap is formed between the outer circumference of the outflow pipe and the canopy fitting portion, and a problem that outside air invades from the gap and the sealant filled in the inside hardens easily occurs.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. It is an object of the present invention to make sure that the outflow pipe is integrated with the canopy, and that even if a strong torque is applied, the idling pipe runs idle. An object of the present invention is to provide a sealant extruded container which does not cause a drop or fall and has a good sealing property.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a paper cylinder having a synthetic resin outflow tube fixed to the upper end of a paper cylinder having an inner surface provided with a barrier lining. In a sealant container in which a plunger is slidably fitted at the lower end of a trunk, a canopy has a deformed portion for preventing rotation at an edge of an opening, and an inner diameter region including the opening is directly above a flange of a synthetic resin outflow pipe. This is configured to be embedded in the thick portion of the cylindrical portion. The deformed portion for preventing rotation may be a straight surface or a notch protruding in the radial direction. In addition, in order to enhance the sealing property on the outer diameter side, preferably an inner seal in which a synthetic resin layer is laminated on both surfaces of the aluminum foil is disposed over the lower surface of the synthetic resin outflow pipe and the canopy,
A rising wall is formed on each of the outer diameters of the canopy and the inner seal, and the rising walls are joined to each other, and the rising 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 denotes 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 via a synthetic resin layer 2a.
Reference numeral 3 denotes a ceiling body, which comprises 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 has an inner surface of a rising wall 61 on the outer diameter side joined to an inner surface of a rising wall 41 of the canopy 4, and an outer surface of the rising wall 61 is connected to the cylinder 1.
To the barrier lining 2. Then, the canopy 4 extends the rising surrounding wall 41 to extend and descend to the annular outer wall 45.
And is wound and fixed so as to enclose the upper end of the paper cylinder 1. Reference numeral 8 denotes a plunger which is fitted into the lower end of the cylinder 1 after filling the sealant. The synthetic resin outflow pipe 5 integrally has a flange 51 of a required size at a lower end of the cylindrical portion 50, a passage hole 52 is formed in the cylindrical portion 50, and a cone nozzle 7 is screwed around the outer periphery. Male screw 53 is formed.

As shown in FIG. 2, the inner seal 6 has synthetic resin layers 6b and 6c laminated on both surfaces of an aluminum foil 6a.
The inner seal 6 is formed of a disk-shaped piece, and a rising wall 61 is integrally formed on the outer diameter side of the face plate portion by drawing. The rising wall 61 has an inner diameter that matches the outer diameter of the rising wall 41 of the canopy 4, and an outer diameter that matches the inner 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 of the outflow pipe. In the present invention, the term “joining” means fusion (or welding) unless otherwise specified.

The canopy 4 has a bent step portion 42 at a position 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 has a flange 5.
1 is aligned with the lower surface. The canopy 4 has an opening 40 whose inner diameter is smaller than the outer diameter D of the external thread 53 of the synthetic resin outflow pipe 5. Then, the inner diameter portion 400 including the opening 40 penetrates deeply into the middle 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 change from a liquid phase to a solid phase. Joined to resin. In addition, the bent step portion 42 and the face plate portion on the inner diameter side than this are joined to the upper surface of the flange 51. And
The opening 40 has a deformed portion 401 for preventing rotation at the edge as shown in FIG. In the first embodiment, the deformed portion has a straight surface, and the straight surface may be provided at one place.
Preferably, it is provided in parallel at a plurality of positions, for example, 180 degrees symmetrical positions.

In a state where the outflow pipe 5 made of synthetic resin is integrated, the canopy 4 has a rising surrounding wall 41 extending outward in a flange shape as shown in FIG. 4, and in this state, the inner seal 6 is fitted outside. Thus, the above-described ceiling body 3 is configured. 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 of the inner seal 6 overlaps the rising surrounding wall 41.
1 is polymerized. In this case, if necessary, the rising wall 61 of the inner seal 6 can be easily assembled.
May be coated with a hot melt resin and joined to the rising surrounding wall 41 of the canopy 4. The ceiling body 3 assembled in this manner is fitted inside the upper end of the cylinder 1 with the rising surrounding walls 41, 61, and in this state, the portion extending outward from the rising surrounding wall 41 of the canopy 4 is bent. As a result, the annular outer wall 45 is formed, and the outer wall 45 is wound around the outer circumference of the cylinder, whereby the canopy 4 is fixed to the cylinder 1. And
The canopy rising surrounding wall 41 and the inner seal rising surrounding wall 61 in the superposed state are heated by a hot air method or a high frequency induction method, whereby the both rising walls 41, 61 and these and the inner surface of the paper cylinder 1 are hermetically joined. You. Specifically, as shown in FIG. 2, the synthetic resin layer 6c 'on the outer surface side of the inner seal rising surrounding wall 61 is fused to the synthetic resin layer 2c of the paper cylinder 1, and the outer surface of the canopy rising surrounding wall 41 is formed on the inner surface of the inner seal rising surrounding wall 61. Is fused to the synthetic resin layer 6b 'on the side.

Incidentally, the inner seal 6 is provided on the rising surrounding wall 61.
Is indispensable to be joined to the canopy rising surrounding wall 41 and the paper cylinder 1, but the region other than the rising surrounding wall 61 may not necessarily be joined. That is, the inner seal face plate may be in contact only 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 in addition to the flange lower surface.
The majority means that a 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 employing this configuration, the inner seal 6 can function as a diaphragm valve against internal pressure fluctuations. However, when the sealant has a property of little expansion and contraction due to heat, the face plate of the inner seal 6 may be joined to at least the lower surface of the flange, or further to all or most of the lower surface of the canopy face plate.

FIG. 5 to FIG. 7 show another embodiment of the present invention. In these embodiments, the basic structure is the same as that of the first embodiment. The inner diameter portion 400 including the opening 40 of the canopy 4 is deeply embedded in the middle region of the base thick portion 500 of the cylindrical portion 50. The upper and lower surfaces and the opening surface are joined to the base component resin. In addition, the bent step portion 42 and the face plate portion on the inner diameter side than this are joined to the upper surface of the flange 51. However, in these embodiments, the non-rotating deformed portion 401
Is not a straight surface as in the first embodiment, but comprises a plurality of notches (or recesses) projecting in the radial direction of the opening 40. In FIG. 5, two notches are provided at 180-degree symmetric positions, in FIG. 6, three notches are provided at equal intervals, and in FIG. 7, four notches are provided at equal intervals. The shape of the notch is not limited,
The shape is not limited to an arc as shown in the figure, but may be a polygon such as a triangle. Further, in some cases, instead of the notch, a projection projecting inward from the opening may be used, but this is not so preferable because the thickness of the cylindrical portion may need to be increased accordingly. In any of the embodiments, it is also preferable that the upper surface and / or the lower surface of the inner diameter portion 400 of the face plate portion embedded in the cylindrical portion 50 have an increased surface area by providing irregularities as necessary.

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 external thread 53 of the synthetic resin outflow pipe 5. As shown schematically in FIG. 8, the canopy 4 is placed just above the cavity of the synthetic resin outflow tube molding die 9, particularly the cavity portion 90 for the flange. You only have to inject it. In this case, the face plate portion and the bent step portion 42 are welded to the formed flange 51, and the opening 40 protrudes into the cavity region for the protruding tube portion. An inner diameter portion 400 is embedded in the middle thickness portion of the base.

The paper cylinder 1 is a spiral paper cylinder, that is, an inner layer paper tape combined with a barrier lining 2 and one or more middle layer paper tapes and an outer layer paper tape wound spirally via an adhesive. The thing made by doing is suitable. The inner layer paper-based tape is one whose one edge in the width direction including the lining 2 is folded, and the folded part is overlapped and fused with the unfolded lining surface at each turn. The intermediate paper tape is wound with the edges in the width direction abutting each other. Since the inner layer paper quality tape is formed into the intermediate paper quality tape, there is no step in the cylinder. In addition, it is preferable that the outer layer paper tape is wound so that the edges in the width direction overlap with each other from the viewpoint of improving strength. Although the synthetic resin outflow pipe 5 has the passage hole opened at the upper end in the embodiment, the present invention is not limited to this, and the upper end of the protruding cylindrical portion 50 may be closed by an integral lid.

[0014]

Next, the operation of the embodiment will be described. The container according to the present invention is filled with the sealant A from the lower end opening of the paper cylinder 1, and the sealant A is housed in a sealed state by fitting the plunger 8. At the time of use, the cone nozzle 7 is removed from the cylindrical portion 50 of the outflow pipe 5 made of synthetic resin, a rod is inserted into the outflow hole, the inner seal 6 is pierced, and the extruder gun is caused to act on the plunger 8 so that the sealant A flows out. It is extruded from the hole 52. Therefore, the ceiling is required to withstand the force in the detaching direction due to the internal pressure of the sealant extruding, and the sealant A has a property of reacting with moisture, oxygen, ultraviolet rays, etc. and hardening, so that it 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 connected to the cylindrical portion just above the flange. It is deeply embedded in the thick part 500 and the upper and lower surfaces and the end face are joined to the thick part 500.
Also, a rising surrounding wall 61 on the outer diameter side of the inner seal 6.
Are joined to the barrier lining 2 of the paper cylinder 1 in a state of being joined to the rising surrounding wall 41 of the canopy 4 in a laminated manner. With these configurations, the bonding strength between the inner diameter region and the outer diameter region of the ceiling can be extremely increased. Further, since the opening 40 of the canopy 4 is deeply embedded in the thick portion 500 of the cylindrical portion immediately above the flange of the synthetic resin outflow pipe 5, the cone nozzle 7
There is no fear that the inner edge of the lower end of the cone nozzle catches the edge of the opening of the canopy during the rotation of the nozzle. Therefore, a stable ceiling strength that can sufficiently withstand the internal pressure of the sealant extrusion can be secured.

On the other hand, with respect to the airtightness, as described above, the inner diameter portion 400 of the canopy 4 is deeply embedded in the cylindrical portion thick portion 500 immediately above the flange of the synthetic resin outflow pipe 5.
The sealing property between the canopy 4 and the outflow pipe 5 made of synthetic resin is excellent. Also, the inner seal 6 does not end at the canopy face plate,
It has 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,
Further, the outer surface of the rising surrounding wall 61 is joined to the barrier lining 2 on the inner surface of the cylinder 1. With such a multi-joint structure, the airtightness of the outer diameter region of the ceiling becomes extremely good.

Further, in use, even if the cone nozzle 7 is violently turned to the tightening side and the strong torque acts on the synthetic resin outflow pipe 5, the inner diameter portion 400 of the canopy 4 is kept out of the synthetic resin outflow pipe. Thick portion 500 of the cylindrical portion immediately above the flange of No. 5
At the edge of the aperture 40, which acts as a wedge against rotation. Therefore, since the large joint area and the mechanical detent action are synergistic, the idling of the synthetic resin outflow pipe 5 can be completely prevented. In addition, after the extrusion is started, if the sealant is not well leaked due to 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. In this state, the outflow pipe 5 made of synthetic resin is often used.
A sealant is adhered to the male screw portion 53, and the adhesive force acts as a resistance, so that the cone nozzle 7 does not easily turn to the loose side, and also a strong torque acts on the outflow pipe 5 made of synthetic resin. Also at this time, because of the above structure, the outflow pipe 5 made of synthetic resin is used.
Never spins. Also, even when the external force is applied to the synthetic resin outflow pipe 5 by pushing down, the inner diameter portion 400 of the canopy 4 is thickened at the cylindrical portion 500 immediately above the flange of the synthetic resin outflow pipe 5.
The synthetic resin outflow pipe 5 does not fall off from the canopy 4 and fall into the container or is pulled out of the canopy at all, since it is deeply embedded like a collar and receives an axial load. In addition, the rising surrounding wall 6 of the inner seal 6
Since 1 is joined to the rising surrounding wall 41 of the canopy 4, there is no fear that the inner seal 6 will come off. Therefore, perfect airtightness is obtained, and the entry of moisture, oxygen, ultraviolet rays, etc. is completely blocked during storage until 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 of the canopy 4, the sealant A is set by the external temperature.
Even if the internal pressure of the container fluctuates due to expansion or contraction of the inner seal 6, the inner seal 6 is displaced like a diaphragm valve according to the internal pressure, so that the inner seal 6 can accurately follow.
In this case as well, the inner seal 6 is attached to the rising wall 61.
Is joined to the rising surrounding wall 41 of the canopy 4 and to the barrier lining 2 of the paper cylinder 1,
Good airtightness is maintained. Further, the inner seal 6 is connected to the flange 51 of the synthetic resin outflow pipe 5 or the canopy 4.
In the case where the outflow pipe 5 and the canopy 4 are joined together, the airtightness 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 cylindrical thick portion 500 immediately above the flange of the synthetic resin outflow pipe 5, and the canopy opening 40 is provided. Has an irregularly shaped portion 401 at the edge thereof, so that the synthetic resin outflow pipe 5 and the canopy 4 can be completely integrated, thereby improving the airtightness and the strength on the ceiling inner diameter side, respectively. At the same time, an excellent effect is obtained in that the synthetic resin outflow pipe 5 does not run idle even when a strong torque acts, and the synthetic resin outflow pipe 5 does not come off due to an external force in the axial direction. In addition, since the joining of the canopy 4 and the outflow tube 5 made of synthetic resin is performed at the time of molding the outflow tube 5 made of synthetic resin, the number of steps can be reduced, and an excellent effect that the cost can be reduced can be obtained. According to the second aspect, the synthetic resin layers 6b,
Rising surrounding walls 41, 61 are formed on the outer diameters of the inner seal 6 and the canopy 4 each having the laminated 6c, and the rising surrounding walls 41, 61 are joined to each other and to the barrier lining 2 at the upper end of the cylinder body. As a result, it is possible to obtain stable strength and high airtightness that can withstand the force in the detaching direction due to internal pressure, and it is possible to provide a highly practical sealant extruding container in combination with the effect according to claim 1. Is obtained.

[Brief description of the 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 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 partially 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 sectional view schematically showing a mold for forming the outflow pipe and integrating it with the canopy according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper cylinder 2 Barrier lining 3 Ceiling body 4 Canopy 5 Outflow pipe made of synthetic resin 6 Inner seal 6a Aluminum foil 6b, 6c Synthetic resin layer 40 Opening 41 Rising surrounding wall 51 Flange 61 Rising surrounding wall 400 Inner part 401 Irregular part 500 cylinder Thick part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65D 83/00 B65D 85/72 B65D 1/00-1/02 B65D 3/00-3/22 E04F 21 / 00-21/30

Claims (4)

(57) [Claims] 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 to the lower end of the paper cylinder. In the sealed sealant container, the canopy 4 has a detent 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 cylindrical portion thick portion 500 immediately above the flange of the synthetic resin outflow pipe 5. A sealant extrusion container characterized by being embedded. 2. Synthetic resin layers 6b, 6 on both surfaces of an aluminum foil 6a.
The inner seal 6 having the laminated c is disposed over the lower surfaces of the synthetic resin outflow pipe 5 and the canopy 4, and rising walls 41, 61 are formed on the outer diameters of the canopy 4 and the inner seal 6, respectively. The sealant extruding container according to claim 1, further comprising joining the inner seals with each other and joining the rising surrounding wall of the inner seal with the barrier lining of the paper cylinder. 3. The extruded sealant container according to claim 1, wherein the irregularly-shaped portion 401 for preventing rotation has a straight surface. 4. The sealant extruding container according to claim 1, wherein the non-rotating deformed portion 401 comprises a notch projecting in a radial direction.