JP6823338B2 - Spout and how to assemble the spout - Google Patents

Description

The present invention relates to, for example, a spout that is attached to an accommodating body made of a sheet material made of a synthetic resin to eject the contained substance in the accommodating body, and a method for assembling such a spout.

Conventionally, there is known a container with a spout in which a spout is attached to an container made of a relatively flexible material such as a synthetic resin sheet in order to take out the contents inside the container. Usually, the spout is integrally formed of a synthetic resin or the like, is arranged between the sheets forming the housing, and is heat-welded to be sandwiched between the sheets and attached. Such spouted housings are used in various fields, and various forms of spouts have been developed according to their uses.

For example, as disclosed in Patent Document 1, there is a usage mode in which a suction needle is inserted into the mouth to eject the contained material, and this is supplied to a necessary place. The spout disclosed in Patent Document 1 has an elastic body sealed in the mouth and a crown (lid) in the mouth so that the contents do not leak even if the injection needle is pulled out and pierced a plurality of times. By covering it, a pressing force is applied to the elastic body from the peripheral wall of the mouth toward the center. According to such a configuration, even if the injection needle is inserted into the elastic body and then pulled out, the perforation by the injection needle is closed and the contained material does not leak out.

In the spout having the above configuration, the crown body is formed with an engaging claw projecting in the central axis direction, and the mouth portion side is formed with an engaging portion with which the engaging claw is engaged. When the body is press-fitted into the mouth in the axial direction and the two are assembled, the crown is configured to be firmly attached to the mouth. That is, since the crown is firmly integrated with the mouth, a pressing force acts from the peripheral wall of the mouth toward the central axis of the elastic body, and the injection needle is inserted. Even if it is pulled out later, the perforation by the injection needle is closed so that the contents do not leak out.

In this case, in order to increase the pressing force acting on the elastic body from the peripheral wall of the mouth, for example, Patent Document 2 discloses a spout in which slits are formed in the peripheral wall of the mouth at regular intervals. .. By forming such a slit, the peripheral wall between the slits easily bends toward the central axis side, and when the crown body is attached to the mouth portion, a large pressing force can be applied to the elastic body. It becomes.

JP 2013-107692 Patent No. 2530108

Assembling the spout having the above-described configuration includes a step of sealing the elastic body in the mouth portion and a step of press-fitting the crown body into the mouth portion in which the elastic body is sealed. These steps can be performed automatically by machine or manually. However, in the case of manual assembly, a large pressing force is required to press-fit the crown into the mouth, so after enclosing the elastic body in the mouth, align the crown with respect to the mouth. Temporary mounting (meaning a state in which the crown is partially attached to the mouth) is performed, and then the crown is pushed into the mouth by a pressing machine (pressing machine) to engage the crown. Is engaged with the engaging part of the mouth.

Patent Document 1 discloses that the engaging claws formed on the lower portion of the inner surface of the peripheral wall of the crown body are formed into a continuous annular shape over the entire circumference so that the crown body and the mouth portion are firmly connected. However, it is not easy to manufacture in consideration of molding (see [0050] in the specification). Therefore, as disclosed in Patent Document 2, openings are formed on the top surface of the crown body at predetermined intervals along the circumferential direction (the openings may be slits leading to the side peripheral walls), and the openings are formed. By forming the engaging claws corresponding to the above, it becomes possible to easily mold the mold (see [0012], FIGS. 3 and 4 of the specification).

Further, it is desirable to increase the width of the engaging claws described above so that a strong connection between the crown and the mouth is formed, but when the engaging width is increased, the crown is temporarily attached to the mouth. Or, when mechanically pressing at once without temporarily mounting, there is a high possibility that the two are not properly aligned. If the position of the crown and the mouth is not appropriate, the elastic body may be damaged, such as pressing the elastic body with the peripheral wall between the slits in the mouth twisted, or the edge of the slit part biting into the elastic body. , The pressing force is weakened, and the rate of defective products increases. That is, the spouts disclosed in Patent Documents 1 and 2 have the width of the engaging claw formed on the crown, the positioning of the mouth with respect to the engaging portion, and the engagement at the time of assembling the crown and the mouth. No consideration is given to the positional relationship between the joint and the slit formed in the mouth, and there is a problem in manufacturing the product accurately and stably.

The present invention has been made by paying attention to the above-mentioned problems, and an object of the present invention is to provide a structure and an assembly method for obtaining a stable product in a spout in which a crown is attached to a mouth portion in which an elastic body is enclosed. And.

In order to achieve the above object, the spout according to the present invention includes a bottom portion and a peripheral wall portion that block the liquid flow path, and has a cylindrical mouth portion in which an elastic body is sealed and a peripheral wall portion of the mouth portion. It has a crown body that is adhered and has a top plate and a circumferential wall, and the mouth portion has an engaging portion formed over the entire circumference at the lower end of the outer surface of the peripheral wall portion and the peripheral wall. The crown body is provided with a plurality of slits formed along the axial direction at equal intervals in the portions, and the crown body is provided at the lower end of the inner surface of the circumferential wall at equal intervals along the circumferential direction on the central axis. It is provided with an engaging claw that is formed so as to project toward the engaging portion and can be engaged with the engaging portion, and the crown body is aligned with the plurality of engaging claws and a plurality of slits of the mouth portion overlapping in the vertical direction. The number of engaging claws on the crown and the number of slits on the mouth are at least one slit between the adjacent engaging claws on the crown while being attached to the mouth. Is formed so that the presence of the slit, and the width of the engaging claw in the circumferential direction is 0.8 to 1.4 times the width of the slit in the circumferential direction. ..

In the spout having the above structure, the crown is attached to the mouth where the elastic body is enclosed (temporarily fixed state), and by pressing this in the axial direction, a plurality of engaging claws of the crown are formed. It engages with the engaging part of the mouth, and both become an integral fixed state (attached state). In this state, a pressing force acts on the elastic body from the peripheral wall of the mouth toward the center, so that the opening is immediately closed after the injection needle is inserted and pulled out, and liquid leakage or the like may occur. Absent.

In this case, the plurality of engaging claws of the crown body are attached to the mouth portion in a state where the plurality of slits of the mouth portion are vertically overlapped and aligned, and the engaging claws of the crown body Since the number and the number of slits in the mouth are formed so that at least one slit exists between the adjacent engaging claws in the adhered state of the crown, the peripheral wall between the slits in the mouth is crowned. It is possible to displace along the circumferential direction when the body is pressed, and it is possible to prevent the elastic body from being twisted and deformed so that the edge of the peripheral wall bites in the radial direction. That is, when the crown body is attached and fixed to the mouth portion, the elastic body is prevented from being damaged by the edge of the peripheral wall between the slits of the mouth portion.

In addition, the width of the engaging claws formed on the crown in the circumferential direction is set to 0.8 to 1.4 times the width of the slits formed in the mouth in the circumferential direction. It is possible to effectively suppress damage to the above-mentioned elastic body without reducing the force at the time of mounting and fixing the crown body and the mouth portion.

Regarding this, if the width of the engaging claws in the circumferential direction is made smaller than the width of the slits in the circumferential direction, the engaging claws can be aligned within the range of the slits at the time of positioning the two slits. Displacement of the peripheral wall can be effectively prevented and a preferable mounting and fixing state can be obtained, but if it is made too small (set to less than 0.8 times), the crown tends to be displaced in the circumferential direction and the fixing force is increased. The problem of weakening arises. That is, as the width of the engaging claw in the circumferential direction becomes smaller, the fixing force of the crown body to the mouth portion weakens, and the pressing force against the elastic body weakens accordingly. On the other hand, if the width of the engaging claws is made too large, even if the engaging claws are aligned with the slits, the engaging claws will protrude greatly in the circumferential direction with respect to the slits. When the body is pressed, the peripheral wall between the slits is displaced, increasing the possibility of damaging the elastic body. Further, it is necessary to increase the pushing force of the crown body for engaging the engaging claw of the crown body with the engaging portion of the mouth portion, which reduces workability.

That is, the limit is to set the width of the engaging claw formed on the crown in the circumferential direction to 1.4 times the width of the slit formed in the mouth in the circumferential direction. By increasing the size, the possibility of defective products increases. Actually, if it is set to 0.8 to 1.0 times, it becomes easier to align the engaging claw within the range of the slit, and defective products do not occur, which is the most preferable range. If it is twice or less, the alignment of both can be easily performed.

Further, in order to obtain the spout as described above, in the present invention, the storage step of storing the elastic body in the mouth and the region where the slit at the upper end of the opening of the mouth where the elastic body is stored is formed. , The alignment step of aligning one of the engaging claws of the crown body, and the aligned crown body is slid down along the corresponding slit of each engaging claw, and each engagement is performed. It is characterized by having a process of pressing a crown body for fixing the joint claw to the engaging portion of the mouth portion.

According to such an assembly method, a high-quality spout can be obtained without damaging the elastic body enclosed in the mouth.

According to the spout of the present invention, in a configuration in which a crown is attached to a mouth portion in which an elastic body is enclosed, it is possible to stably obtain a product in which a stable elastic force acts on the elastic body.

It is a figure which shows the crown body which comprises the spout which concerns on one Embodiment of this invention, (a) is a plan view, (b) is a perspective view, (c) is a side view, (d) is a figure (c). Sectional view along line AA. It is a figure which shows the main body of the spout which concerns on one Embodiment of this invention, (a) is a plan view, (b) is a side view, (c) is a perspective view. FIG. 3 is a partial cross-sectional view of a slit forming position showing a state in which the crown body shown in FIG. 1 is attached while being pressed against the mouth portion of the main body shown in FIG. It shows a state in which the crown body shown in FIG. 1 is attached while being pressed against the mouth portion of the main body shown in FIG. 2, and is formed in the mouth portion expected when the elastic body is not stored in the mouth portion. A partial cross-sectional view of the peripheral wall position showing the deformed state of the peripheral wall between the slits. It is a figure which shows the state which the crown body shown in FIG. 1 is attached and fixed to the mouth part of the main body shown in FIG. 2, and is the partial sectional view of the peripheral wall position between the slits formed in the mouth part. It is a figure which shows the other embodiment of the body of a spout, (a) is a plan view, (b) is a side view, (c) is a perspective view. A partial cross-sectional view showing an example of a peripheral wall portion formed on a crown body. Partial sectional view showing another example of the peripheral wall part formed in a crown body.

Hereinafter, embodiments of the present invention will be described.
1 to 5 are views showing an embodiment of a spout according to the present invention, and FIGS. 1 (a) to 1 (d) are views showing a structure of a crown, FIGS. 2 (a) to 2 (c). 3 is a view showing the main body of the spout, FIG. 3 is a partial cross-sectional view of a slit forming position showing a state in which the crown shown in FIG. 1 is attached while being pressed against the mouth of the main body shown in FIG. 2, FIG. When the crown body shown in FIG. 1 is attached while pressing against the mouth portion of the main body shown in FIG. 2, the engaging claws of the crown body are in contact with the peripheral wall between the slits formed in the mouth portion. A partial cross-sectional view of the peripheral wall position showing the deformed state of the peripheral wall of the mouth when it is assumed that the elastic body is not stored in the mouth when pressed and inserted, and FIG. 5 shows the crown shown in FIG. It is a partial cross-sectional view of the peripheral wall position showing the peripheral wall portion between the slits formed in the mouth portion, showing the state of being mounted and fixed to the mouth portion of the main body shown in FIG.

The spout S according to the present invention is adhered (adhered and pressed and fixed) to a main body 1 to be welded via a sheet-like member (not shown) and a mouth portion 2 formed in the main body 1. It is provided with a crown body 50 and is used in an assembled state as shown in FIG. An injection needle for ejecting the contained matter in the contained body formed by welding the periphery of the sheet-like member is inserted into the axially central portion of the spout S.
Hereinafter, the main body 1 and the crown body 50 constituting the spout S will be described.

As shown in FIG. 2, the main body 1 is welded to a mouth portion 10 extending in the axial direction, a welding portion 3 having a substantially boat-shaped cross section so that a pair of sheet-shaped members are welded, and the mouth portion 10. It is provided with a flat plate-shaped flange portion 5 formed between the portions. The pair of sheet-shaped members are welded to the outer surface of the welded portion 3 with the upper edge abutted against the flange portion 5. The welded portion 3 may be formed of a single curved surface or a plurality of flat surfaces, and a groove may be formed on the surface thereof in consideration of sink marks during welding of the sheet material. It can be appropriately deformed, such as forming 3a.

The mouth portion 10 is formed so as to project in a substantially cylindrical shape from the flange portion 5 toward one side, and rubber is formed in a cylindrical recess 12 defined by a peripheral wall portion (circular wall) 11 constituting the mouth portion 10. The elastic body 70 such as the above is stored. The bottom portion 12a of the recess 12 of the present embodiment is partitioned by a partition wall, and a liquid flow path (communication hole) 12b is formed below the bottom portion 12a so as to communicate with the accommodating portion formed by the sheet-like member. ing. In this case, the bottom portion 12a initially blocks the liquid flow path 12b, but at the time of use, the thickness is such that the injection needle pierced from above can easily pass through and the elastic body to be stored is supported. It has. The bottom portion 12a may have an opening formed in the central portion thereof so as to communicate with the liquid flow path 12b (an opening may be formed in the bottom portion).

As described above, by providing the partition wall (bottom portion 12a) at the mouth portion, it is possible to prevent the elastic body 70 from protruding into the liquid flow path and reducing the pressing force when the pressing force described later is applied to the elastic body 70. Further, it is possible to prevent foreign matter such as dust and dirt from entering the liquid liquid passage inside the spout. Further, in the state before use, it is possible to prevent the contents from entering the mouth of the spout and coming into contact with the elastic body 70.

The mouth portion 10 has an enlarged diameter at the intermediate portion and extends upward as it is, and the circumferential step portion 10a of this portion serves as an engaging portion that engages with the engaging claw formed on the crown body 50. (Hereinafter referred to as the engaging portion 10a). That is, the engaging portion 10a is formed around the mouth portion over 360 °, and the engaging claw of the crown body 50 always engages with the engaging portion 10a by pressing the crown body 50 in the axial direction. In addition, the crown body 50 is configured so that it can be adhered to the mouth portion 10.

A plurality of slits 11a cut along the axial direction from the upper end edge of the peripheral wall are formed in the peripheral wall portion 11 of the mouth portion 10 at predetermined intervals in the circumferential direction. The number of slits 11a formed is not particularly limited, but in the present embodiment, six slits 11a are formed at equal intervals. Therefore, the peripheral wall portion 11 has a plurality of peripheral walls 11b so as to be located between the slits. Further, the width W of the slit 11a formed in the circumferential direction is set in a relationship described later with the width W1 of the engaging claw formed in the crown 50 in the circumferential direction.

The main body 1 having the above configuration can be integrally formed as a dress by molding a synthetic resin such as polypropylene or polyethylene resin.

Next, the crown body 50 to be adhered to the mouth portion will be described with reference to FIG.
The crown body 50 is formed in the shape of a cylindrical lid, and has a diameter sufficient to be adhered to the mouth portion 10. At the lower end of the inner surface of the peripheral wall (circular wall) 50a of the crown body 50, a plurality of engaging claws 51 projecting toward the central axis side are formed. In the present embodiment, three engaging claws 51 are formed at predetermined intervals in the circumferential direction corresponding to the mouth portion 10 having six slits 11a, and the crown body 50 is formed in the mouth portion 10. It is formed so that there is one slit between the adjacent engaging claws 51 when it is adhered to. Further, each engaging claw 51 is formed with an inclined portion 51a so that the crown body can be smoothly guided downward when the crown body is attached to the mouth portion (see the arrow in FIG. 3).

The width W1 in the circumferential direction of each engaging claw 51 formed on the crown 50 is 0.8 to 1.4 times, preferably 0.9 to 1, the width W in the circumferential direction of the slit 11a. It is formed so as to be 0.3 times, more preferably 0.9 to 1.0 times. Further, as shown in FIG. 1 (d), a tapered surface 50b is formed on the inner surface of the peripheral wall 50a so as to gradually incline upward. Therefore, the crown body 50 is gradually thickened as it moves upward (moves from the opening portion to the top plate portion).

In the central region of the top surface 50c of the crown body 50, a recess 50d is formed so as to be recessed downward, and the bottom thereof is formed in a thin film shape (thin film 50d'). Further, an opening 50e is formed on the top surface 50c according to the position where the engaging claw 51 is formed. As described above, such an opening 50e is formed to remove the mold when forming the engaging claw 51 projecting toward the central axis side at the lower end portion of the peripheral wall 50a, and such an opening is formed. By forming the crown 51, the molding of the crown 51 can be facilitated.

It is preferable that the peripheral wall 50a is formed with a slit 50f along the axial direction corresponding to the position formed by the engaging claw 51. In this case, the slit 50f may be formed so as to pass through the top plate (connect to the opening 50e) except for the opening end portion of the peripheral wall 50a. By forming such a slit 50f, as will be described later, the position of the crown body 50 with respect to the mouth portion 10 can be easily performed, and after the crown body is attached to the mouth portion, the elastic body 70 is attached from the side surface of the spout. It can be visually recognized. When such a slit 50f is formed, the peripheral wall is likely to be elastically deformed to the outside and the pressing force on the peripheral wall portion of the mouth portion may decrease. Therefore, the peripheral wall 50a can maintain its strength and pressing force. It is preferable to form 50 g of one or more circumferential rings that are thickened in a circumferential shape. In the present embodiment, 50 g of two such thickened circumferential rings are formed on the top plate portion and the substantially intermediate portion.

Similar to the main body 1 described above, the crown body 50 can be integrally formed as a dress by molding a synthetic resin such as polypropylene or polyethylene resin.

Next, a procedure (method) for assembling the spout S by aligning the crown body 50 with the mouth portion 10 and integrally fixing both of them will be described.
First, the elastic body 70 is housed in the recess 12 of the mouth portion 10 of the main body 1. As the elastic body, one that matches the shape of the recess 12 of the mouth portion 10 is used, but one that is the same as or slightly higher than the height of the peripheral wall portion 11 is used. Further, the diameter thereof is also substantially the same as the diameter of the recess 12, and has a substantially cylindrical shape as a whole. As will be described later, when the crown 50 is adhered, the recess of the crown is formed. It is pressed by the thin film 50d'which is the bottom of the 50d, and the sealing property is improved between the thin film 50d'and the peripheral wall portion 11. That is, the thin film 50d'covers the upper surface of the elastic body 70 housed in the recess 12, prevents the elastic body from sticking out, and has an effect as a pressing means for pressing the elastic body from above, and also has an effect on the surface of the elastic body. It has the effect of protecting the surface and preventing the adhesion of dust and the like. The constituent material of the elastic body 70 may be any material that can be elastically deformed, but in the present embodiment, fluorosilicone rubber having excellent solvent resistance is considered in consideration of elastic deformability and suitability for contents. Is used. Further, the storage operation of the elastic body 70 with respect to the mouth portion 10 may be performed mechanically or manually.

Next, the crown body 50 is adhered to the mouth portion 10 in which the elastic body 70 is enclosed. At the time of this attachment, the engaging claw 51 of the crown body 50 is pushed in while being aligned with the slit 11a of the mouth portion 10. In this case, the engaging claw 51 of the crown body is pushed in in a state of being aligned with the slit of the mouth or while being aligned. That is, if the position of the engaging claw 51 coincides with the position of the slit, there is little resistance when the crown body is pushed in, and a smooth attachment operation can be performed. Here, even if the initial positioning of both is insufficient, as shown in FIG. 4, the engaging claw 51 presses the peripheral wall 11b so as to strongly tilt it in the radial direction, but the inclined portion of the engaging claw As the 51a slides down along the surface of the peripheral wall 11b of the mouth portion 51, the curved surface of the peripheral wall 11b makes it easy to skid along the slit side and is positioned. In particular, the number of engaging claws 51 of the crown body 50 and the number of slits 11a of the mouth portion 10 are formed so that at least one slit exists between the adjacent engaging claws in the adhered state of the crown body. Therefore, when the crown body slides down, the peripheral wall 11b is likely to be displaced in the circumferential direction, and the engaging claw 51 is likely to skid toward the slit side.

Further, the circumferential width W1 of the engaging claw 51 formed on the crown 50 is 0.8 to 1.4 times the circumferential width W of the slit 11a formed on the mouth 10. By setting to, as described above, it becomes easy to align the engaging claw 51 so as to match the position of the slit 11a when the crown body 50 is placed on the mouth portion 10, and then the sliding descent is pushed in. Assembling (pressing work) of the crown body is facilitated.

When the crown body 50 is manually attached, the crown body is aligned with the mouth portion and temporarily attached, and then the crown body portion is pressed by setting it on a pressing machine. When performing the temporary mounting, the operator can easily align the position with the feeling of a hand (the position where a large load does not act when the crown is pressed against the mouth is aligned), and the position is accurate. It is possible to press with a pressing machine in the state of being temporarily attached. Alternatively, as described above, if the slit 50f is formed in the crown body 50 corresponding to the position of the engaging claw 51, the position of the slit 50f can be easily visually aligned with the slit 11a of the mouth portion. It is possible to perform temporary mounting with high accuracy.

Further, when aligning the crown body 50 and the mouth portion 10 by a machine, it is preferable to push down the crown body 50 in the axial direction in a state where the crown body 50 can rotate relative to the mouth portion 10. That is, by pushing down while rotating the crown body 50, it is possible to push down in a state where the positions of the engaging claw 51 and the slit 11a, which are the positions with the least resistance, match (see FIG. 3), and a smooth pushing down operation can be performed. At the same time, the elastic body is not pressed in a state where the peripheral wall 11b between the slits is twisted in the lateral direction.

As described above, when the crown body 50 aligned with respect to the mouth portion 10 is pushed all the way in, the engaging claw 51 engages with the engaging portion 10a, both are firmly fixed, and the crown body 50 is mouthed. A spout structure that is forcibly fitted and fixed to the portion can be obtained. In this fixed state, the plurality of engaging claws 51 of the crown body 50 and the plurality of slits 11a of the mouth portion 10 are overlapped and aligned in the vertical direction. That is, it is in a state of being aligned within the width range of the slit 11a (W1 is 1.0 times or less) or slightly protruding from the width range (W1 is larger than 1.0). In this case, since the engaging portion 10a is formed on the mouth portion 10 over the entire circumference, the engaging claw 51 of the crown body 50 is surely engaged with the mouth portion, and the crown body 50 is engaged. It can be firmly fixed (see FIGS. 3 to 5).

Further, in such an adhered state, since the bottom of the recess 50d of the crown body 50 is a thin film, whether or not the elastic body 70 is housed is whether or not the thin film 50d'is swollen. It is possible to easily distinguish visually.

Further, in the present embodiment, since the tapered surface 50b that gradually inclines upward is formed on the inner surface of the peripheral wall 50a of the crown body 50, when the crown body 50 is adhered, FIG. As shown in the above, the peripheral wall 11b can apply a large pressing force to the elastic body 70 as it shifts to the opening side. That is, when the injection needle is pulled out, the pressing force on the side where the elastic body 70 is pulled out is large, so that liquid leakage can be reliably prevented.

Then, in the adhered state in which the engaging claw 51 of the crown body 50 is engaged with the engaging portion 10a of the mouth portion, as described above, both are in a state of being overlapped and aligned in the vertical direction. The pressing of the elastic body 70 in a twisted state of the peripheral wall 11b between the slits 11a of the mouth is suppressed, and the occurrence of defective products such as a weak pressing force on the elastic body or damage to the elastic body is prevented. be able to.

FIG. 6 is a diagram showing another embodiment of the main body of the spout.
In this embodiment, the slit portion formed in the mouth portion 10 of the main body 1 shown in FIG. 2 is deformed.
Specifically, the corners on both sides of the opening end of the peripheral wall 11b between the adjacent slits 11a of the mouth portion 10 are cut, and the inclined portion 11e is formed in that portion so as to descend toward the slit side.

By forming the inclined portions 11e on both sides of the end portion of the peripheral wall 11b between the slits 11a in this way, the engaging claw 51 of the crown body 50 can be easily aligned with the slit portion. That is, the engaging claws of the crown body can easily move downward while being in contact with the inclined portion. In particular, when the crown body 50 is rotatably pushed in when the crown body 50 is attached, the engaging claws 51 are surely slit. It is possible to slide downward while being guided by the 11a portion.

Further, it is preferable to cut the corners on both outer surface sides of the peripheral wall 11b between the adjacent slits 11a of the mouth portion 10 (the chamfer 11f is formed).
By forming the chamfer 11f in this way, when the inclined portion 51a of the engaging claw 51 slides down along the surface of the peripheral wall 11b of the mouth portion 51, the inclined portion 51a of the engaging claw 51 comes into contact with the chamfer 11f. It is positioned and easily lowered.

The spout S to which the crown body 50 is mounted and fixed as described above is not particularly limited in terms of its size, the number of slits and engaging claws, etc., but is configured within the following size range. Is preferable.
The diameter of the mouth portion 10 is 5 to 20 mm, and 4 to 16 slits 11a are formed at equal intervals in the circumferential direction. Further, there are 2 to 8 engaging claws 51 (slits 50f) of the crown body 50, and there is at least one slit between adjacent engaging claws in a state where the engaging claws 51 are aligned with the slits 11a. Form to do. That is, the presence of at least one slit between the adjacent engaging claws can effectively prevent the elastic body 70 from being damaged. In the present embodiment, as described above, six slits 11a are formed at equal intervals, and three locking claws 51 are formed at equal intervals on the crown body 50.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be variously modified and implemented without departing from the gist thereof.
For example, as shown in FIGS. 7 and 8, it is not necessary to form a slit in the peripheral wall 50a of the crown body 50. In this case, FIG. 7 shows the configuration of the peripheral wall portion in which the slit 50f of the crown body shown in FIG. 3 is built up from the inner surface side to eliminate the slit, and FIG. 8 shows the configuration of the crown body shown in FIG. The configuration of the peripheral wall portion in which the slit 50f is built up from the outer surface side to eliminate the slit is shown. As described above, if the crown body 50 is not formed with a slit, the inside can be covered and damage to the elastic body and invasion of dust and the like can be reliably prevented. Further, if the structure does not form a slit in the crown body 50, it is not necessary to form the circumferential ring 50 g.

Further, the engaging claw 51 formed on the crown body 50 and the above-mentioned circumferential ring 50 g may be made of a separate member from the crown body and may be attached to the inner or outer surface thereof. According to such a configuration, the size of the engaging claw can be changed according to the diameter of the mouth portion 10, and the crown body 50 can be made into a single mold.

1 Main body 10 Mouth 10a Circumferential step (engagement)
11 Peripheral wall 11a Slit 12a Bottom 12b Liquid flow path 50 Crown body 50a Circumferential wall 50b Tapered surface 50c Top plate 50f Slit 50g Circumferential ring 51 Engagement claw 70 Elastic body

Claims (5)

A cylindrical mouth portion having a bottom portion and a peripheral wall portion that closes the liquid flow path and an elastic body is enclosed, and a crown body that is adhered to the peripheral wall portion of the mouth portion and has a top plate and a peripheral wall. In a spout with,
The mouth portion is formed by an engaging portion formed over the entire circumference at the lower end of the outer surface of the peripheral wall portion and a plurality of engagement portions formed by cutting the peripheral wall portion along the axial direction from the upper end edge at equal intervals. comprising a number of slits, positioned between the slits of adjacent said plurality of slits, and a plurality of peripheral walls which presses the elastic body enclosed in the mouth portion,
A plurality of slits are formed at equal intervals along the axial direction on the circumferential wall of the crown body , and at equal intervals along the circumferential direction at the lower end of the inner surface of the circumferential wall in accordance with the positions of the slits. A plurality of engaging claws are formed so as to project toward the central axis and engage with the engaging portion of the mouth portion .
The Kanmuritai, together are adhered to the mouth portion in a state in which a plurality of slits and a plurality of engaging claws of the crown is aligned to overlap a plurality of slits and the longitudinal direction of the opening the number of slits having a mouth portion of the engaging claw of the crown is formed such that one of the mouth of the slit between adjacent engaging claw is present in the deposition condition of the crown,
The corners on both sides of the open end of the peripheral wall between the adjacent slits of the mouth portion are cut, and the corners on the outer surfaces on both sides of the peripheral wall are cut.
The circumferential width of the engaging claw is formed to be 0.8 to 1.4 times the circumferential width of the slit of the mouth portion .
A spout that is characterized by that. The spout according to claim 1, wherein one or more circumferential rings thickened in a circumferential shape are formed on the circumferential wall of the crown body. The spout according to claim 1 or 2, wherein a tapered portion that gradually becomes thicker from the opening portion to the top plate portion is formed on the inner surface of the circumferential wall of the crown body. The method for assembling a spout according to any one of claims 1 to 3.
A storage process for storing the elastic body in the mouth and
The alignment step of aligning one of the engaging claws of the crown body with the region where the slit at the upper end of the opening of the mouth where the elastic body is housed is formed.
A method of pressing the crown body in which the aligned crown body is slid down along the corresponding slits of the engaging claws to fix each engaging claw to the engaging portion of the mouth portion.
A method of assembling a spout, which comprises having. The method for assembling a spout according to claim 4, wherein the alignment step pushes down the crown body in an axial direction in a state where the crown body can rotate relative to the mouth portion.

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