JP2000281043A - Sealant push-out container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge type sealant push-out container whose barrier property is not lost even when pressure or chock is acted, and which is provided with high inner pressure proof property and complete air tightness. SOLUTION: On a flange top face of a synthetic resin discharge tube 5, a paper board 4a or a top cover 4 having synthetic resin layers 4b, 4c on the top and bottom faces of the paper board 4a is joined and integrated. A membrane 6 is provided at the bottom face of the synthetic resin discharge tube 5 and the top cover 4. Standing surrounding walls 41, 61 are formed each on the outer diameter part of the top cover 4 and the membrane 6. The walls 41, 61 are connected with each other, and a reinforcing ring 7 connected at the inside of the wall 41 of the top cover 4. The walls 41, 61 and the reinforcing ring 7 are convered by the paper tube body top end inside curl 10. The wall 61 of the membrane 6 is connected with a barrier lining 2 of the paper tube body, and the reinforcing ring 7 is connected with the barrier lining 2 of the inside curl 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved sealant extrusion container.

[0002]

2. Description of the Related Art A sealant is widely used as a material for sealing work, and as a container for extruding such a sealant, a canopy was conventionally made of a metal plate or a synthetic resin. The incineration process has problems such as damage to the furnace and secondary pollution due to unburned metals. As a measure against this,
Although the canopy is composed of a laminated body mainly composed of paper, the prior art discloses a paper cylinder that only covers a portion of the lower surface of the discharge pipe flange from the lower surface of the discharge pipe flange to the outer diameter area. Maintaining airtightness at the end of the torso depended solely on the joint between the rising wall of the canopy and the inner curl.

However, since the canopy is mainly made of paper, drawability is poor, and a number of vertical wrinkles are formed on the inner surface and the outer surface of the rising surrounding wall. The step due to the wrinkles reduces the effective joint area with the inner curl. As a result, insufficient joining strength was caused, and a small passage-like gap was formed between the vertical wrinkles, and airtightness was likely to be insufficient. In addition, the discharge pipe has a threaded portion on the outer periphery, which is screwed with the cap, so that torque when rotating the cap is transmitted to the discharge pipe including the flange, and acts as a force for peeling the joint of the membrane. . At this time, in the prior art, since the membrane is only joined to the canopy in the outer diameter area slightly below the lower surface of the discharge pipe flange, if a strong torque is applied to the discharge pipe due to rough handling, the membrane is locally peeled, and the discharge is performed. The gap between the outer periphery of the tube and the fitting portion of the canopy may communicate with the inside of the container. There are various types of sealants, such as silicone type, modified silicone type, polyurethane type, etc. In particular, the latter two require strict airtightness because they react easily with moisture, oxygen, ultraviolet rays, etc. and are hardened. In the technique, since the outer diameter side and the inner diameter side are insufficiently airtight as described above, a problem that external air invades and solidifies the sealant easily occurs.

As a countermeasure against this, the applicant filed Patent No. 2867.
No. 318 proposed an improved cartridge type sealant extrusion container. According to this, in a sealant extrusion container of a type in which a canopy having a discharge pipe in the center is attached to the upper end of a paper cylinder cylinder having a barrier lining on the inner surface, and a plunger is fitted in the lower end, On the flange upper surface of the synthetic resin discharge tube having a flange, a paperboard or a canopy having a synthetic resin layer on the upper and lower surfaces of the paperboard is joined and integrated, and a membrane in which a synthetic resin layer is laminated on both surfaces of an aluminum foil is formed of the synthetic resin. Arranged on the lower surface of the discharge pipe and the canopy, and formed upright surrounding walls at the outer diameter portions of the canopy and the membrane, respectively, and join the rising surrounding walls to each other and enclose the inner curl portion at the upper end of the paper cylinder, The rising wall of the membrane is joined to the barrier lining of the cylinder, the rising wall of the canopy is joined to the barrier lining of the inner curl, and the surface of the canopy The inner diameter is buried in the thick part of the projecting cylinder just above the flange of the synthetic resin discharge pipe, so it is easy to incinerate and has better internal pressure resistance and better airtightness than conventional ones It has become possible to obtain a cartridge-type sealant extruding container.

However, even in this prior art, when a high pressure is applied to the inside of the container, the container is dropped, or a shock of handling is applied, the rising wall at the outer diameter of the canopy and the membrane is easily deformed. As shown in 7, the joint between the rising surrounding wall of the membrane and the barrier lining of the inner curl at the upper end of the paper cylinder drum is peeled or cracking occurs.
As a result, there is a problem that the barrier property is impaired and the sealant material is easily cured.

[0006]

SUMMARY OF THE INVENTION The present invention further solves the problems of the conventional cartridge type sealant extruding container as described above, and the barrier property is not impaired even when pressure or impact is applied, and the internal pressure resistance is extremely high. It is an object of the present invention to provide a cartridge type sealant extruding container having complete airtightness.

[0007]

In order to achieve the above object, a sealant extruding container according to the present invention comprises a paper cylinder having a barrier lining on an inner surface, a top end having a discharge pipe in the center at the upper end, and a lower end. In a sealant extrusion container of a type in which a plunger is fitted inside, a canopy having a synthetic resin layer on the upper and lower surfaces of paperboard or paperboard is integrally joined to the flange upper surface of the synthetic resin discharge pipe having a flange at the lower end. Arranging a membrane on the lower surface of the synthetic resin discharge pipe and the canopy, and forming rising walls on the outer diameters of the canopy and the membrane, respectively, and joining the rising walls to each other and inside the rising wall of the canopy. The rising wall and the reinforcing ring are encased in the inner curl at the top of the cylinder, and the rising wall of the membrane is Of joining the barrier lining, it is characterized in that it has joined the barrier lining the inner curled section of the reinforcing ring. The reinforcing ring may be a thick short paper cylinder, preferably made of synthetic resin, and is molded simultaneously with the synthetic resin discharge tube and integrated with the canopy.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 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 2c and a synthetic resin layer 2d is provided on the inner surface of a paperboard 1a composed of a plurality of layers via a synthetic resin layer 2b. 3
Is a ceiling body, which is composed of a canopy 4 mainly made of paper, a synthetic resin discharge pipe 5, a reinforcing ring 7 and a membrane 6, and the periphery of the canopy 4, the reinforcing ring 7 and the membrane 6 is the paper cylinder. 1 is fixed so as to be enveloped by the inner curl portion 10 formed at the upper end of the first curl. Reference numeral 8 denotes a plunger which is fitted into the lower end of the cylinder 1 after filling the sealant.

More specifically, the canopy 4 may be made of a single piece of paperboard, but preferably has synthetic resin layers 4b and 4c laminated or coated on the upper and lower surfaces of the paperboard 4a. In any case, the canopy 4 is formed of a circular base plate having an opening 40 in the center, and a rising wall 41 is integrally formed on the outer diameter portion by drawing. The synthetic resin discharge pipe 5 has a flange 51 of a required size at the lower end of the protruding cylindrical portion 50, an outflow passage 52 is formed in the protruding cylindrical portion 50, and a cone nozzle A is screwed on the outer periphery. Male thread 5
3 are formed. The membrane 6 has synthetic resin layers 6b and 6c laminated on both surfaces of an aluminum foil 6a. The membrane 6 is formed of a disk-shaped piece having an outer diameter substantially the same as that of the canopy 4.
Are integrally formed. The rising wall 61 has an inner diameter matching the outer diameter of the surrounding wall 41 of the canopy 4 and an outer diameter matching the inner diameter of the paper cylinder 1. The reinforcing ring 7 is sufficiently thicker and stronger than the canopy 4. The material may be a short paper cylinder, but in this embodiment, it is made of a synthetic resin molded body, and its outer diameter matches the inner diameter of the surrounding wall 41 of the canopy 4.

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 discharge pipe. Further, in the present invention, the term "joining" means fusion (or welding) unless otherwise specified.
Shall be referred to.

In the first embodiment, as shown in FIG. 2, the canopy 4 is provided with a bent step 42 at a face plate portion corresponding to the outer peripheral end face of the flange of the synthetic resin discharge pipe 5. Also, the lower surface of the face plate portion on the outer diameter side is aligned with the lower surface of the flange 51. And in this first embodiment,
The canopy 4 and the synthetic resin discharge pipe 5 are integrated by in-mold molding (insert molding), and the inner diameter portion 400 of the face plate including the opening 40 is deeply penetrated into the thick portion 500 at the base of the protruding cylindrical portion 50. The upper and lower surfaces and the opening surface are joined to the base component resin. Further, the reinforcing ring 7 is simultaneously formed with the canopy 4 and the discharge pipe 5 made of synthetic resin by in-mold molding.

In order to obtain such a structure, the opening 40 of the canopy 4 is made smaller than the outer diameter of the male screw 53 of the synthetic resin discharge pipe 5, and the canopy 4 is formed with the cavity of the molding die, especially for the flange. In addition to disposing the molten synthetic resin directly above the cavity portion and forming a reinforcing ring forming cavity on the inner diameter side of the surrounding wall 41 of the canopy 4, the molten synthetic resin may be injected into the cavity in this state. In this way, the formed flange 5
1, a face plate portion and a bent step portion 42 are welded.
Projecting into the cavity region for the protruding cylinder portion, the inflow synthetic resin forms the protruding cylinder portion 50, and at the same time, the inner diameter portion 400 of the top plate portion is embedded in the thick portion 500 of the cylinder base. Further, since the synthetic resin flows into the cavity on the inner diameter side of the surrounding wall 41 of the canopy 4, the reinforcing ring is formed and is simultaneously joined to the surrounding wall 41 of the canopy 4.

A membrane 6 is externally fitted to a first body in which the canopy 4, the synthetic resin discharge pipe 5 and the reinforcing ring 7 are integrated, thereby forming a ceiling body 3 as shown in FIG. . That is, the upper surface of the face plate portion of the membrane 6 overlaps the lower surface of the flange and the lower surface of the face plate portion in the aligned state,
The rising wall 61 of the membrane 6 is combined with the rising wall 41 so as to overlap. In this case, if necessary, the rising surrounding walls 41 and 61 may be joined in a spot manner so as to facilitate assembly.

The ceiling body 3 is internally fitted at a position at a predetermined depth level from the upper end opening of the cylinder 1, and in this state, the upper end of the cylinder 1 is bent inward to form an inner curl portion 10. Is formed. The canopy rising wall 41 and the membrane rising wall 61 and the reinforcing ring 7 integrated with the canopy rising wall 41 in the superposed state are pressed from inside and outside by the inner curl portion 10,
It is joined in this state. By heating in this state by a hot air system or a high-frequency induction system, the upstanding walls 41 and 61 are joined to each other, and the inner curl portion 10 and the reinforcing ring 7 and the inner curl portion 10 are joined. . More specifically, as shown in FIG. 2, the outer surface 7b of the reinforcing ring 7 is fused to the synthetic resin layer 4b 'in the above step, and the inner surface 7a of the reinforcing ring 7 is fused to the synthetic resin layer 2c' of the inner curl portion 10. Then, the synthetic resin layer 4c ′ on the outer surface side of the canopy rising surrounding wall 41 is fused with the synthetic resin layer 6b ′ on the inner surface side of the membrane rising surrounding wall 61, and the synthetic resin layer 6c ′ on the outer surface side of the rising surrounding wall 61 of the membrane 6 becomes It is fused with the synthetic resin layer 2 d ′ of the paper cylinder 1.

It is essential that the rising wall 61 of the membrane 6 is joined to the canopy rising wall 41 and the cylinder 1 as described above, but it is not always necessary to join the area other than the rising wall 61. Not necessary. That is, the membrane face plate may be in contact with the lower surface of the flange of the synthetic resin discharge pipe 5, or may be in contact with all or most of the lower surface of the canopy face plate in addition to the lower surface of the flange. 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 membrane 6 can function as an adjusting valve for internal pressure fluctuation.
However, when the sealant has a property of little expansion and contraction due to heat, the face plate portion of the membrane 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 portion.

FIGS. 4 and 5 show a second embodiment of the present invention. In this embodiment, the canopy 4 extends linearly without forming a bent step portion on the face plate portion, and therefore, a step exists between the lower surface of the face plate portion and the lower surface of the flange 51. In this example, the membrane 6 rises obliquely past the lower surface of the flange 51 and continues to the surrounding wall 61. Instead of this, it may be bent along the lower surface of the canopy face plate portion after passing through the lower surface of the flange 51. Also in this embodiment, the face plate portion of the membrane 6 may not be joined to the flange 51 or the like as in the first embodiment, or may be joined as necessary. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.

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 and middle layers of the paper tape are wound with their widthwise edges abutting against each other, whereby a step is not generated in the cylinder body, and the sealing property with the plunger 8 can be improved. The outer layer paper tape is preferably wound so that the edges in the width direction overlap with each other from the viewpoint of improving strength. In the embodiment, the outflow passage of the synthetic resin discharge pipe 5 is open at the upper end, but the present invention is not limited to this. The upper end of the protruding cylindrical portion 50 may be closed by an integral lid. Alternatively, the protruding cylindrical portion 50 may be directly extended into a tapered cone shape to integrally have a cone nozzle portion. Further, the reinforcing ring 7 may be formed separately from the canopy 4 by injection molding or extrusion molding in some cases. In this case, the reinforcing ring 7 is fitted inside the canopy rising surrounding wall 41 and joined by fusion or the like.
Even when the reinforcing ring 7 is made of a short paper cylinder, the reinforcing ring 7 is fitted inside the canopy rising surrounding wall 41 and joined by fusion or the like.

[0018]

Next, the operation of the embodiment will be described. The container according to the present invention is filled with the sealant B from the lower end opening of the paper cylinder 1 and accommodates the sealant B in a sealed state by fitting and inserting the plunger 8. The gun is pushed out of the outflow passage 52 by acting on the plunger 8. Therefore,
The ceiling is required to withstand the force in the direction of release due to the internal pressure of the sealant extruder, and the sealant A must have high airtightness because it has the property of reacting with moisture, oxygen, ultraviolet rays, etc. and hardening. is there.

In the first embodiment, the paperboard 1a or the canopy 4 composed mainly of the paperboard 1a is reinforced by the flange 51 of the central synthetic resin discharge pipe 5, and the face plate of the canopy 4 is joined to the upper surface of the flange. Not only that, the bent step portion 42 at the intermediate portion in the radial direction of the face plate portion is joined to the flange end face, and the face plate portion inner diameter portion 400 is deeply embedded in the protruding cylindrical portion thick portion 500 immediately above the flange. The upper and lower surfaces and the end surface are joined to the protruding cylindrical portion thick portion 500. In addition, the rising surrounding wall 61 on the outer diameter side of the membrane 6.
Is fixed to the inner curl portion 10 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. Furthermore, a thick reinforcing ring 7 is integrally joined to the inner diameter side of the rising surrounding wall 41 of the canopy 4, and is covered with the inner curl portion 10 so as to embed the reinforcing ring 7. With these configurations, the bonding strength between the inner diameter region and the outer diameter region of the ceiling can be extremely increased.

Furthermore, since the opening 40 of the canopy 4 is deeply embedded in the protruding cylindrical portion 500 just above the flange of the synthetic resin discharge pipe 5, the inner edge of the lower end of the cone nozzle when the cone nozzle 7 rotates is opened. There is no risk of catching the opening edges and thereby damaging the paperboard or causing delamination. Therefore, it is possible to secure a stable ceiling strength that can sufficiently withstand the internal pressure of the sealant extrusion while using the paper-based canopy.

On the other hand, regarding the airtightness, as described above, the inner diameter portion 400 of the face plate portion of the canopy 4 is deeply embedded in the thick portion 500 of the projecting cylindrical portion immediately above the flange of the discharge pipe 5 made of synthetic resin. The sealing property between the discharge pipe 4 and the synthetic resin discharge pipe 5 is excellent. Further, the membrane 6 does not end with the canopy face plate portion, but has a rising surrounding wall 61 on the outer diameter side, an inner surface of the rising surrounding wall 61 is joined to an outer surface of the rising surrounding wall 41 of the canopy 4, and an outer surface of the rising surrounding wall 61. Are joined to the barrier lining 2 on the inner surface of the cylinder 1, the inner surface of the rising surrounding wall 41 is joined to the reinforcing ring 7, and the inner surface of the reinforcing ring 7 It is joined to the barrier lining 2. Such a multi-junction structure greatly improves the sealing performance. In addition, since the rising wall 61 of the membrane 6 joined to the lining 2 of the paper cylinder 1 is made of aluminum foil 6a having good squeezability, wrinkles are significantly reduced compared to the rising wall 41 made of pulp fiber. It fuses tightly with the barrier lining 2 of the inner surface 1 on a wide surface, and does not form a minute gap. For this reason, the airtightness of the ceiling outer diameter region is also extremely good.

Further, even if a strong torque acts on the discharge pipe 5 made of synthetic resin, the canopy 4 has a large joint area as described above, and the rising wall 41 of the canopy 4 has the reinforcing ring 7.
And the discharge pipe 5 made of synthetic resin does not rotate, and the rising wall 6 of the membrane 6 does not rotate.
1 is not only joined to the rising wall 41 of the canopy 4,
The rising surrounding wall 41 is reliably reinforced from the inner diameter side by the reinforcing ring 7. Therefore, even when a strong pressure acts on the inside of the container due to the extrusion, the container falls from a high place, or a strong impact acts upon handling or the like, the reinforcing ring 7 is firmly attached to the inner side and the outer side. It is possible to receive the deformation force with respect to the force from the radial side. Therefore, even when the pressure or the impact is applied, as shown in FIG. 6, the synthetic resin layer 6c 'on the outer surface side of the rising surrounding wall 61 of the membrane 6 is firmly joined to the synthetic resin layer 2d' of the paper cylinder cylinder 1. By maintaining the state as it is, the joints thereof are completely prevented from peeling or cracking. For this reason, perfect airtightness is obtained, and the entry of moisture, oxygen, ultraviolet rays, and the like is completely blocked during storage and during use until use, and the sealant is not cured.

In manufacturing, the joining of the canopy 4, the discharge tube 5 made of synthetic resin and the reinforcing ring 7 is performed at the time of molding the discharge tube 5 made of synthetic resin, so that the number of steps can be reduced and the cost can be reduced. Can be.

Also in the second embodiment, not only the membrane 6 is joined to the rising wall 41 of the canopy 4 by the rising wall 61, but also the strength of the rising wall 41 of the canopy 4 is significantly increased by the reinforcing ring 7. Therefore, the airtightness is still good, and the same ceiling strength as that of the first embodiment can be obtained. In each example,
When the membrane 6 is not joined to the flange 51 of the synthetic resin discharge pipe 5 or the face plate of the canopy 4, even if the sealant B expands or contracts due to the external temperature, the internal pressure of the container fluctuates. Since the membrane 6 is displaced in the thickness direction like a diaphragm valve in accordance with the internal pressure, the membrane 6 can accurately follow. Also in this case, the rising wall 61 of the membrane 6 is joined to the rising wall 41 of the canopy 4, and the rising wall 41 is connected to the reinforcing ring 7.
Similarly, the inner curl portion 10 is wrapped in a reinforced state, so that good airtightness is maintained. When the membrane 6 is joined to the flange 51 of the synthetic resin discharge pipe 5 or the face plate of the canopy 4, the discharge pipe 5 and the canopy 4
And the airtightness of the joining region with the metal can be increased.

[0025]

According to the first aspect of the present invention described above, the inner diameter portion 400 of the face plate portion of the canopy 4 is embedded in the thick portion 500 of the projecting cylindrical portion immediately above the flange of the synthetic resin discharge pipe 5. Therefore, the airtightness between the synthetic resin discharge pipe 5 and the canopy 4,
Not only can the strength on the inner diameter side of the ceiling be improved, but also the synthetic resin layers 6b and 6c on both sides of the aluminum foil 6a.
Are formed on the outer diameter of the membrane 6 and the paper-based canopy 4, respectively, and the reinforcing rings 7 are formed on the inner diameter side of the canopy 4 not only by joining the rising walls 41 and 61 to each other. The rising wall 41, 61 and the reinforcing ring 7 are encapsulated in the inner curl portion 10 at the upper end of the cylinder, the rising wall 61 of the membrane 6 is joined to the barrier lining 2 of the cylinder, and the canopy is formed. 4 is joined to the barrier lining 2 of the inner curl portion 10 so that it has a stable strength and high airtightness that can withstand the force in the detaching direction due to the internal pressure, the fall from a high place, and the external pressure and impact of handling. An excellent effect is obtained such as providing a highly practical sealant extruding container which is easy to incinerate.

According to the second aspect, since the reinforcing ring 7 is made of a synthetic resin, is molded simultaneously with the discharge pipe 5 made of a synthetic resin and is integrated with the canopy 4, it is easy to manufacture and can be obtained at low cost. As a result, an excellent effect that the bonding strength with the canopy 4 can be increased can be obtained.

[Brief description of the drawings]

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

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

FIG. 3 is a partially cutaway perspective view of a ceiling body in the first embodiment.

FIG. 4 is a partial sectional view showing a second embodiment of the present invention.

FIG. 5 is a partially enlarged view of FIG. 4;

FIG. 6 is an explanatory view showing a state when pressure or impact acts on the sealant extrusion container of the present invention.

FIG. 7 is an explanatory view showing a state when pressure or impact acts on a conventional sealant extrusion container.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 paper cylinder 2 barrier lining 3 ceiling 4 canopy 4 b, 4 c synthetic resin layer 5 synthetic resin discharge tube 6 membrane 6 a aluminum foil 6 b, 6 c synthetic resin layer 7 reinforcing ring 10 curl part 41 rising wall 50 flange 61 rising Enclosure

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 22:00 F term (Reference) 3E084 AA02 AA12 AA34 AA37 AB06 CB02 CC07 CC08 FA06 FD13 HA01 KB10 LC01 LD30 4F211 AA04 AA11 AD03 AD05 AD06 AD08 AD20 AD25 AG03 AG06 AG08 AG21 AH55 TA01 TC07 TC09 TC16 TD12 TN13 TN24

Claims (2)

[Claims] 1. A sealant extruding container in which a canopy having a discharge pipe in the center is attached to the upper end of a paper cylinder cylinder having a barrier lining on the inner surface, and a plunger is fitted in the lower end. The top surface of the synthetic resin discharge pipe 5 having the synthetic resin layers 4b and 4c on the upper and lower surfaces of the paperboard 4a is joined to and integrated with the upper surface of the flange of the synthetic resin discharge pipe 5 and the membrane 6 is connected to the synthetic resin discharge pipe 5 And, arranged on the lower surface of the canopy 4 and formed at the outer diameters of the canopy 4 and the membrane 6 respectively, rising walls 41, 61 are joined to each other, and the rising walls of the canopy 4 are joined together. A reinforcing ring 7 is joined to the inside of the inner wall 41, and the rising surrounding walls 41, 61 and the reinforcing ring 7 are wrapped in the inner curl portion 10 at the upper end of the paper cylinder cylinder, and the membrane 6 rises. The enclosure 61 is bonded to the barrier lining 2 of the paper tube cylinder, sealant extrusion container, characterized in that bonding the reinforcing ring 7 and the barrier lining 2 of the curled portion 10. 2. The reinforcing ring 7 is made of a synthetic resin.
The container for extruding a sealant according to claim 1, wherein the container is molded simultaneously with the synthetic resin discharge pipe (5) and integrated with the canopy (4).