JPH047074Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a spout made of synthetic resin that is heat-sealed to the inner surface of the opening of a bag body to form a container.

[Prior art] As this type of pouring spout, for example,
One disclosed in No. 15659 is known.
The spout is attached to the outer circumferential surface of the peripheral wall of the synthetic resin bag by heat fusion, thereby sealing the bag body. Therefore, it is necessary that the outer surface of the spout and the inner surface of the bag body are in close contact throughout.

[Problems with the prior art] However, in reality, if the shapes of both ends of the peripheral wall are significantly changed from the center where the mouth is formed,
Since it cannot be in close contact with the bag body, it must be made somewhat thick, so a striped groove is generated on the outer circumferential surface of this part from the top end to the bottom end. In other words, the outer surface of both ends of the peripheral wall and the outer surface of the center part, which serve as the sealing surface with the bag body, must be as flat as possible for a good seal, and for this purpose, both ends are made thick. Despite this, the groove portion is generated between the end portion and the center portion. The sealing surface will not be flat. Therefore, even if the bag body is heat-sealed to this sealing surface, only the groove portion is not fused. Since this groove extends continuously from the upper end to the lower end, leaks often occur in this groove after the bag is fused to the main body, resulting in poor container manufacturing yields. Note that such grooves are called sink marks, and they occur because the thicker end portions solidify more slowly during molding than the adjacent thinner portions, and this portion is eventually drawn inward. It is.

Therefore, an object of this invention is to provide a spout for a container that has an outer circumferential surface that can be reliably brought into close contact with the bag body without causing sink marks during molding.

[Means for Solving the Problems] In the spout of the container of this invention, a pair of peripheral walls of the mounting portion intersect to form a thick wall portion. A recess is molded integrally with the mounting portion when molding the mounting portion so as to leave a continuous sealing surface on a part of the outer surface and the adjacent outside surface.

[Example] Below, a spout of a container according to an example of this invention will be described with reference to FIGS. 1 and 2.

In the figure, reference numeral 10 indicates a spout formed by integral molding of synthetic resin, and reference numeral 11 indicates a bag body formed by attaching the edges of two flexible synthetic resin sheets by heat fusion. . These spout 10 and bag body 1
1 constitutes a container.

The spout 10 has a cylindrical opening 12 and this opening 12.
The mounting part 13 provided at the bottom of the mounting part 1
3 and a flange portion 14 located between the mouth portion 12. The mouth part 12 has a cylindrical shape, and the bag body 11
It communicates with the interior of the bag body 11 to guide the filling, such as fluid, inside the bag body 11 to the outside. The filling at this time is the mouth part 1.
It may be taken out directly from the bag body 11, or it may be taken out by inserting a means for taking it out, such as a suction tube, into the bag body 11 through the opening 12. The mounting portion 13 has a pair of curved peripheral walls 15, 15.
15 are integrally connected to each other at both ends to form a boat shape. Both end portions of these peripheral walls 15, 15 are formed thicker than other portions because the two peripheral walls intersect. A pair of recesses 16, 16 are formed in each outer surface of this thick portion, that is, both ends. These recesses 16, 16 extend in the curved direction and are located parallel to each other with a predetermined interval in the vertical direction. The outer surface of this thickened part thus has a sealing surface consisting of an upper part, a middle part and a lower part, separated by recesses 16,16. These recesses 1
6 and 16 are molded together when the peripheral wall is formed, and are formed by providing a protrusion in a mold for molding the attachment portion.

The flange portion 14 is provided on the upper surface of the attachment portion so as to slightly protrude from the outer peripheral surface of the attachment portion 13 over the entire circumference.

In the spout having the above structure, the recesses 16, 16 are formed at both ends of the peripheral wall 15 of the attachment part 13 during molding, so this thick part also solidifies almost simultaneously with the adjacent part. be done. Therefore, it is possible to prevent the generation of streak-shaped grooves extending continuously from the upper end to the lower end caused by sink marks on the sealing surface of the thick portion defined by the recesses 16, 16. Therefore, the outer circumferential surface consisting of the outer surface of the thick portion and the outer surface of the central portion becomes a sealing surface that is continuous in the circumferential direction. This sealing surface is not flat only at the recesses 16, 16, but since they do not extend continuously from the upper end to the lower end of the outer peripheral surface, there is no risk of leakage occurring from these regions after sealing. For this reason, when the outer circumferential surface of the attaching part 15 and the inner circumferential surface of the opening of the bag body 11 are sealed by thermocompression bonding, no leakage occurs at both ends of the attaching part 15, that is, the thick part.

In the above embodiment, the case where there is one mouth part 12 has been explained, but the mouth part 12 is not limited to such a configuration, and as shown in FIG. 3 to FIG. It's okay to have more than one.

In this example, three openings 12 are arranged in a row and protrude from the upper surface of the mounting portion 13. recess 16,
16 are formed in the thick portions at both ends of the peripheral wall 15, as in the previous embodiment. In addition, the mouth part 1 of the mounting part 13
Since the part located between 2 is also thick, another recess 17 is formed on the outer surface of this part.
This recess 17 prevents sink marks from occurring in this area.

In the above embodiment, the mouth part has a circular cross section, but other shapes may be used, and the number and dimension of the mouth part may be selected as required. Further, the shape and number of the recesses are not limited to those of the above embodiments, and can be arbitrarily selected as long as a sealing surface that is continuous with the outer surface of the adjacent portion can be formed in the thick part. can be done.

[Effect of the invention] In this spout, the recesses formed during the molding of the peripheral wall of the mounting part are formed in the thick wall portions at both ends of the peripheral wall, so there is no shrinkage on the outer surface of the thick wall portion. Therefore, there is good adhesion to the bag body, and thus sealing can be performed reliably and manufacturing yields are high.
Containers can be manufactured.

[Brief explanation of drawings]

1 and 2 show a spout according to an embodiment of this invention, FIG. 1 is a partially sectional side view of the spout, and FIG. 2 is taken along line 2-2 in FIG. 3 to 5 show a spout according to another embodiment, FIG. 3 is a partially cutaway side view, and FIG. 4 is a partially cutaway side view of FIG. 5 is a longitudinal sectional view taken along line 5--5 of FIG. 3. FIG. 10... Outlet, 11... Bag body, 12... Mouth, 13... Attachment, 15... Peripheral wall, 16... Recess.

Claims (1)

[Scope of utility model registration request] A synthetic resin pouring spout having a mounting portion having a mouth portion and a pair of peripheral walls that intersect at both ends to form a thick wall portion, the outer peripheral surface of the peripheral walls being heat fused to the bag body for sealing, A container characterized in that a recess is molded integrally with a part of the outer surface of the thick wall part when molding the attachment part so as to leave a continuous sealing surface between the thick wall part and the adjacent outer surface. spout.