JPH038606Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a capping pressure support structure in a container nozzle, and is particularly used for bottle containers for packaging liquid contents such as liquid detergent. .

[Conventional technology]

Plastic bottle containers are widely used as containers for liquid detergents, seasonings, etc. In such a bottle container, after the container is tilted and the contents are poured out, the content liquid is transmitted to the outer surface of the nozzle part, so-called dripping, or to improve the pouring operation and draining. , a cap 20 consisting of two or more members as shown in FIG. 2 is often used. The cap 20 includes a first cap 3a and a second cap 23.
The first cap 3a is fixed to the nozzle 2 of the bottle container and includes a spouting guide tube 21 and a drip collecting groove 22, and the second cap 23 is removably connected to the first cap 3a. and is configured to open and close the container.

Such a first cap does not need to be displaced relative to the nozzle portion of the container, but rather needs to be reliably fitted and fixed in a fluid-tight manner without relative displacement.

Therefore, for the fitting part between the first cap and the nozzle part 2, an undercut fitting structure is used instead of a screw that easily loosens, and in this case, the cap is usually fitted with an undercut part. In this case, a plugging type cap is used in which the nozzle part is supported by the holder 15 and the cap is placed over the upper end of the nozzle part, and a force is applied from above the cap in the axial direction of the nozzle part.

In FIG. 3, 101 is a conventional nozzle section 10.
2 and the plugging type cap 103.

The plugging type cap 103 has the upper end of the nozzle part 102 accommodated in a groove 107 formed by the top plate 4 and an inner wall 105 and an outer wall 106 coaxially connected to the lower surface of the top plate 4. The undercut part 8 and the nozzle part 10 are plugged and fitted together, and the fitting is performed by the undercut part 8 formed by going around the inner peripheral surface of the outer wall 106 and the nozzle part 10.
2, and an outward annular protrusion 11 formed around the outer circumferential surface of 2.

The undercut portion 8 is formed near the lower end of the outer wall 106, and the lower end surface 111 of the outer wall 106 forms a horizontal annular surface.

A horizontal annular flange portion 112 protruding inward is formed at the upper end of the nozzle portion 102, and an inner edge 112a of the flange portion 112 is in contact with the outer circumferential surface of the inner wall 105, and
The upper surface 112b is in contact with the inner surface of the top plate 4 of the plugging type cap 103 via a packing member 16 provided as necessary.

The nozzle portion 102 forms an annular protrusion 113 bent in a bellows shape below the outward annular protrusion 11 . The outer peripheral surface of the protrusion 113 is the outer wall 106
It is flush with the outer peripheral surface of. Upper surface 11 of protrusion 113
3a faces the lower end surface 111 of the outer wall 106 at a distance d, and the lower surface 113b is located on the lower back side of the upper surface 113a, both of which form a horizontal annular surface. Therefore, the nozzle portion 2 has a substantially U-shaped cross section from the top of the outward annular projection 11 to the upper surface 113a.

The lower portion adjacent to the protrusion 113 is an annular groove 114 for engaging the holder 15. That is, the groove 114 has the lower surface 113b as one wall surface, and the horizontal upper surface 15a of the holder 15 as the lower surface 113.
The holder 15 can be engaged with the groove 114 while in contact with the groove 114.

[The problem that the idea aims to solve]

In the conventional fitting part 101 between the nozzle part 102 and the plugging type cap 103, in the plugging process of fitting the undercut parts 8 and 11, the holder 15 is engaged with the groove 114 and the nozzle is closed. With the cap 102 supported and the cap 103 placed over the upper end of the nozzle 102, plug pressure is applied from above the cap 103 in the axial direction 9. Since the outer diameter of the top of the undercut part 11 is larger than the inner diameter of the top of the undercut part 8, a considerable amount of plugging pressure is required. Projection 1
1 to the protrusion 113 is bent inward, that is, in the direction 10, and the distance between the lower end 111 of the outer wall 106 and the upper surface 113a of the protrusion 113 is narrowed. Therefore, the value of d must take into account this deflection in advance. That is, if the value of d is not set sufficiently large, the lower end surface 111 of the outer wall 6
Even when the undercut parts 8 and 11 are brought into contact with the upper surface 113a of the cap 13, the undercut parts 8 and 11 still do not fit together, and there is a problem that the capping process is easily caused by passing through the capping process without this fitting being achieved. . However, increasing d in order to prevent this defective capping not only makes the container unnecessarily large and is uneconomical, but also promotes the bending of the nozzle portion, which makes it impossible to completely solve the problem of poor capping. It's hard to be.

This idea was made in view of the above circumstances, and it is possible to make the length of the container nozzle part shorter and more economical than before, and it is possible to prevent plugging defects caused by bending of the nozzle part. The object of the present invention is to provide a capping pressure support structure in a container nozzle section.

[Means to solve the problem]

Corresponding to this purpose, the capping pressure support structure in the container nozzle part of this invention has a capping type cap having a groove formed by an inner wall and an outer wall having an undercut on the inner peripheral surface. A capping pressure support structure for a capper into which a cylindrical nozzle part is fitted, wherein the outer circumferential surface of the cylindrical nozzle part is provided with an outer surface facing outward for fitting a capping type cap. An annular protrusion and an annular groove for engagement with a cappering holder are formed coaxially at intervals, and a straight line parallel to the axial direction from the end face of the nozzle part to the annular groove is the outward annular groove in the nozzle part. An inward annular protrusion is formed on the inner circumferential surface of the nozzle portion near the outward annular protrusion so as to pass through the entire length and thickness of the wall connecting the protrusion and the annular groove. In a state in which the outward annular protrusion is in contact with the outer cylinder and the inward annular protrusion is in contact with the inner cylinder, a line connecting the two contact points is the outward annular protrusion of the nozzle part. It is characterized in that it is configured to be included within the thickness of a wall connecting the inward annular protrusion and the inward annular protrusion.

[Effect]

In the capping pressure support structure for the container nozzle configured as described above, the capping type cap is attached to the container nozzle while the capping holder is engaged with the annular groove and the container is supported by the capping holder. When pressure is applied from above the plugging cap with This is the resultant force of the force applied to the contact portion B of the inward annular protrusion of the nozzle portion.

Here, since the line segment connecting A and B is included within the inner thickness of the wall connecting the outward annular projection and the inward annular projection of the nozzle part, the sum of the plugging pressures applied to A and B is It is expressed as a downward force in the axial direction with point F (not shown) on line segment AB as the point of action, and the position of point F at this time is determined by the magnitude of the force applied to each of A and B. Therefore, it is assumed that a line segment CD parallel to the axial direction from the upper end surface of the nozzle portion toward the annular groove portion passes within the wall thickness over the entire length of the wall connecting the outward annular protrusion and the annular groove portion in the nozzle portion, and AB and
Assuming that the intersection of DC is E, the relationship between the magnitudes of the forces applied to A and B can be adjusted so that F matches E, and the way to do this is at point B depending on the magnitude of the force applied to A. The size of the contact area between the typical inward annular protrusion and the inner wall is realized by selecting the nozzle shape.

Then, the plugging pressure becomes a force in the direction ED with E as the point of action, and since ED is included in the thickness of the wall connecting the outward annular projection and the annular groove, this plugging pressure causes this wall to Without deflecting, the undercut portion of the cap reliably passes over the outward annular projection of the container nozzle portion.

Subsequently, the capping type cap contacts the upper end of the nozzle portion with its top plate portion and transmits a portion of the plugging pressure to the upper end of the nozzle as well. Since this force is a force in the CD direction with C as the point of action, this force also passes through the entire length of the wall connecting the outward annular projection and the annular groove and does not bend the wall in this portion. The capping is completed with a small dimension d.

〔Example〕

The details of this invention will be explained below with reference to the drawings showing one embodiment.

In FIG. 1, reference numeral 1 denotes a fitting portion between the plugging type cap 3 and the nozzle portion 2. As shown in FIG.

The plugging type cap 3 is configured to fit the nozzle part 2 into a groove 7 formed by a top plate 4 and an inner wall 5 and an outer wall 6 coaxially connected to the lower surface of the top plate 4, with the upper end of the nozzle part 2 accommodated therein. The fitting is plugged into the outer wall 6.
The undercut portion 8 is formed around the inner peripheral surface of the nozzle portion 2, and the outward annular protrusion 11 is formed around the outer peripheral surface of the nozzle portion 2.

The undercut portion 8 is formed near the lower end of the outer wall 6, and the lower end surface 6a of the outer wall 6 forms a horizontal annular surface.

An annular bead portion 12 that protrudes inward is formed in the nozzle portion 2 following the outward annular protrusion 11 , and the bead portion 12 is in contact with the outer circumferential surface of the inner wall 5 . The bead portion 12 is located closer to the upper end of the nozzle portion 2 than the outward annular projection 11, and connects the contact point A between the undercut portion 8 and the outer wall 6 and the contact point B between the bead portion 12 and the inner wall 5. There is a line segment AB that does not deviate from within the wall thickness of the nozzle portion 2 in this section, and this line segment AB is configured to be nearly parallel to the direction 10 toward the inside of the container.

The upper end surface 13 of the nozzle portion 2 is in contact with the inner surface of the top plate 4 of the plugging type cap 3 via a packing member 16 provided as necessary.

An annular groove 14 for engaging the holder 15 is formed in the nozzle portion 2 below the outward annular protrusion 11 and coaxially with the outward annular protrusion 11 .

Of the surfaces forming the annular groove 14, the holder 15
Supported surface 1 to be supported by the upper surface 15a of
4a is a horizontal annular surface, and there is a direction line CD of the plugging pressure parallel to the direction 9 from the point C on the upper end surface 13 of the nozzle part 2 to the point D on the supported surface 14a.
The direction line CD passes outside the wall thickness of the bead portion 12, but does not deviate outside the wall thickness at the portion of the wall 17 connecting the outward annular projection 11 and the annular groove portion 14. The wall 17 is shaped so that it can directly transmit the plugging pressure to the holder 15 and is not easily bent by the plugging pressure, and is made somewhat thicker than other parts of the nozzle part 2. It is also preferable to increase the strength and make it more difficult to bend. The outer diameter of the wall 17 gradually increases downward from the base of the outward annular protrusion 11 to ensure the necessary contact area between the supported surface 14a and the holder 15, and the lower end surface 6a of the outer wall 6. reduces the distance d ₁ from holder 15 to holder 1
It is allowed to approach 5. It is important that d ₁ has a value smaller than d.

The inner circumferential surface 14b of the nozzle portion 2 in the groove portion 14 protrudes inward and is in contact with the outer circumferential surface of the lower end portion of the inner wall 5.

FIG. 2 shows a fitting portion 1a between the nozzle portion 2 provided with a capping pressure support structure in such a container nozzle portion and a cap 20 consisting of two members.

[Effect of idea]

In the capping pressure support structure in the nozzle part configured in this way, the wall 17 does not bend during plugging, and d ₁ can be set to a smaller value than the conventional d, so that the length of the nozzle part It is possible to make the length shorter and more economical, and it is possible to completely prevent the occurrence of plugging defects caused by deflection of the nozzle part. In addition,
Since the nozzle part 2 is in contact with the inner wall 5 at the inner circumferential surface of the bead part 12 and the annular groove part 14, there is no deformation in which the outward annular protrusion 11 bends inward, so-called escape, and once fitted. Accidents in which the undercut portion 8 and the outward annular protrusion 11 become loosely fitted or come off are also prevented.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional end view showing the fitting part between the container nozzle part and the cap, which are equipped with a stoppering pressure support structure in the container nozzle part according to an embodiment of this invention, and Fig. 2 is the same as shown in Fig. 1. FIG. 3 is a vertical cross-sectional view showing a state in which a two-member cap is fitted into a container nozzle portion, and FIG. 3 is a vertical cross-sectional end view showing a conventional container nozzle portion and a cap fitting portion. 1... Fitting part, 2... Nozzle part, 3... Plug type cap, 4... Top plate, 5... Inner wall, 6... Outer wall, 7... Groove, 8... Undercut part, 9 ……
Direction, 10...Direction, 11...Outward annular protrusion,
12... Bead portion, 13... Upper end surface, 14... Annular groove portion, 14a... Supported surface, 15... Holder,
16... Packing member, 17... Wall, 20...
Cap, 21... Pour guide cylinder, 22... Groove for collecting drippings, 23... Second cap, 101...
Fitting part, 102... Nozzle part, 103... Plug type cap, 105... Inner wall, 107... Groove, 11
1... lower end surface, 113... protrusion, 114...
groove.

Claims (1)

[Scope of utility model registration request] A capping pressure support structure for capping in which a cylindrical nozzle portion of a container is fitted into a groove of a capping type cap having a groove formed by an inner wall and an outer wall having an undercut on the inner circumferential surface, An outward annular protrusion for fitting a plugging type cap and an annular groove for engaging a plugging holder are formed coaxially and spaced apart from each other on the outer peripheral surface of the cylindrical nozzle portion, each making one turn around the outer peripheral surface. so that a straight line parallel to the axial direction from the end face of the nozzle part toward the annular groove passes through the entire length and thickness of the wall connecting the outward annular protrusion and the annular groove in the nozzle part. Further, an inward annular protrusion is formed on an inner circumferential surface of the nozzle portion near the outward annular protrusion, the outward annular protrusion abuts the outer cylinder, and the inward annular protrusion is in contact with the outer cylinder. When in contact with the inner cylinder, a line segment connecting the two contact points is included within the thickness of a wall connecting the outward annular protrusion and the inward annular protrusion of the nozzle part. A capping pressure support structure in a container nozzle portion, characterized by comprising: