JPH0628460Y2 - Cap body - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cap body that is used by being attached to a liquid container or the like for containing a liquid detergent, a finishing agent, a beverage, cosmetics or the like.

"Prior Art" Conventionally, a cap body shown in Fig. 3 has been provided as a cap body that can easily and lightly use the amount of the liquid detergent contained in a container.

The cap body includes an inner plug cap 2 screwed to the container mouth portion 1 and an outer cap 3 screwed to the inner plug cap 2.
It consists of and. The inner plug cap 2 is provided with a pouring nozzle 2a and a ventilation pipe 2b which communicate with the opening of the container opening 1. The outer cap 3 is formed in a cup shape, and a flange portion 3a having a crank-shaped cross section is provided on the outer circumference of the outer cap 3 over the entire circumference. In this cap body, when the outer cap 3 is mounted, the flange portion 3a of the cap body abuts and tightly contacts the upper end portion of the inner plug cap 2, so that the inside of the container is shielded from the outside air, whereby the internal liquid Are kept out of the container.

The cap body is used by being attached to a container containing a liquid detergent or the like. First, when the liquid detergent is sold or stored, the outer cap 3 is sufficiently tightened to the inner plug cap 2 to prevent the liquid detergent from flowing out. When using the liquid detergent, the outer cap 3 can be removed, and the detergent can be poured into the removed outer cap 3 from the pouring nozzle 2a of the inner plug cap 2 to measure the liquid detergent.

[Problems to be solved by the invention] By the way, in the conventional cap body, the outer cap 3 or the inner cap 2 may be deformed by a shock during transportation, or the outer cap 3 may be loosened to cause liquid leakage. In order to prevent or to prevent deformation during pouring when using the outer cap 3 as a measuring cup, both the inner plug cap 2 and the outer cap 3 must be molded of a hard material.

However, since the inner cap 2 and the outer cap 3 formed of such a hard material do not fit each other well, a gap in which the content liquid flows out to a portion to be brought into close contact or contact (hereinafter referred to as a seal portion). There was a problem that is likely to occur.

In particular, in a cap body having a large diameter that is attached to a large-sized liquid container, it is difficult to maintain good dimensional accuracy at the time of manufacturing. In order to obtain a cap body with stable sealing performance, it is necessary to apply a complicated design to the seal portion, or a separate cushioning member is provided between the caps 2 and 3.
In the former case, the die is complicated and defects due to defective molding are increased, and the production speed is lowered, resulting in an increase in cost. In the latter case, the space between the outer cap 3 and the cushioning member and between the cushioning member and the inner stopper is increased. Due to strong friction between the cap 2 and the outer cap 3 when the outer cap 3 was tightened, the cushioning member was distorted and deformed, and there was an accident that the protrusion or cutout occurred.

Further, in the cap body including the hard caps 2 and 3 as described above, a screw is loosened between the caps 2 and 3 or a play is generated over time to form a gap, which causes liquid leakage. There was a problem.

[Means for Solving Problems] Therefore, in the cap body of the present invention, the inner stopper cap connects the outer wall portion forming the container mounting portion, which is the mounting portion to the container, and the outer wall portion and the opening. And a packing layer made of a soft material formed by a different material molding method on the partition wall, and the opening-side end portion of the tip of the engaging portion with the inner cap of the outer cap is sharply formed. Thus, when the outer cap is attached to the inner plug cap, the opening side end of the outer cap abuts against the packing layer and bites into the packing layer, thereby solving the above problems.

"Operation" Since the opening side end of the outer cap comes into contact with the packing layer made of a soft material and bites into the packing layer, the outer cap and the inner plug cap are tightly adhered to each other.

Further, the elastic force of the packing layer prevents the outer cap from loosening.

Further, in the cap body of the present invention, a main body portion excluding the packing layer is formed by primary molding, and then a new cavity space is formed around the molded main body portion, and a different material is injected therein. By using a different material molding method for molding the packing layer, the packing layer can be tightly and integrally adhered and fixed to the outer cap or the inner plug cap.

[Examples] Hereinafter, the cap body of the present invention will be described in detail with reference to the examples shown in the drawings. The same components as those of the conventional example are designated by the same reference numerals to simplify the description.

1 and 2 show an embodiment of the cap body of the present invention.

The cap body includes an inner cap 2 attached to the container opening 1 and an outer cap 3 attached to the inner cap 2.
It consists of and. Both caps 2 and 3 are made of a hard material such as polypropylene.

The inner plug cap 2 includes a substantially cylindrical outer wall portion 2c, a partition wall 2d partitioning a middle position thereof, a pouring nozzle 2a provided so as to extend upward on the partition wall 2d, and a partition wall 2d downwardly. The vent nozzle 2a and the vent pipe 2b are formed by the vent pipe 2b provided so as to extend.
Is connected to the opening. The outer wall portion 2c is the partition wall 2
The lower part from d is the mounting part to the container mouth part 1 (container mounting part)
The upper portion of the partition wall 2d is a portion (outer cap attachment portion) 5 to which the outer cap 3 is attached. Screws are formed on the inner surfaces of the mounting portions 4 and 5.

The opening end side of the outer cap 3 is the inner plug cap 2 described above.
The engaging portion 3b is screwed to the mounting portion 5 of the. On the outer surface of the engaging portion 3b, the air escape groove 3 which vertically cuts the screw is formed.
c is formed.

On the outer surface of the outer cap 3, the inner plug cap 2 is attached when mounted.
A flange portion 3a that abuts and closely contacts the upper end portion of the mounting portion 5 is formed over the entire circumference. This flange part 3
The reference character a has a substantially crank-shaped vertical cross section, and is continuously provided at one end of the crank on the outer surface of the cap 3 and extends from there to the bottom side of the cap 3, which is the mounting portion 5 of the inner plug cap 2.
The inscribed portion 6 is inscribed in the inner surface. The other end of the flange portion 3a is a contact portion 7 that contacts the upper end surface of the mounting portion 5 of the inner stopper cap 2. The outer diameter of the inscribed portion 6 of the flange portion 3 a is equal to the mounting portion 5 of the inner plug cap 2.
Is slightly larger than the inner diameter of the upper end of the.

A packing layer 8 is formed on the upper surface of the peripheral edge portion of the partition wall 2d formed in the middle stage of the inner plug cap 2. That is, the packing layer 8 is formed on the inner circumference of the base end of the outer cap mounting portion 5 of the inner plug cap 2. And this inner cap 2
When the outer cap 3 is attached to the outer cap 3, the opening-side end 3e of the outer cap 3 comes into contact with the packing layer 8 and bites into the packing layer 8 to seal the container to an extremely high degree. The packing layer 8 is preferably formed of a flexible material having elasticity, for example, a thermoplastic elastomer such as styrene-butadiene rubber or thermoplastic polyurethane.

The packing layer 8 is formed by a different material forming method, and is formed immediately after forming the main body portion of the inner plug cap 2. In the cap body of this example, the material forming the packing layer 8 is compatible with the material forming the main body portion of the inner plug cap 2, and is molded at a temperature higher than the melting temperature of the material forming the main body portion. As a result, the packing layer 8 formed by this different material molding method is used.
Is formed in a state in which the inner surface thereof is tightly fused to the main body portion of the inner plug cap 2.

In the cap body having such a configuration, the outer cap 3
When the inner cap 3 is fastened to the inner plug cap 2, the opening-side end 3e of the outer cap 3 comes into contact with the packing layer 8 of the inner plug cap 2 and bites into and adheres to it, so that the inside of the container and the outside air are blocked and the container is sealed. . Particularly, since the inner plug cap 2 is provided with the packing layer 8 made of a soft material, the inner plug cap 2
Even if the dimensional accuracy of the mounting portion 5 and the flange portion 3a of the outer cap 3 is slightly low, the packing layer 8 is deformed so that the gap therebetween is sealed. The elastic force of the packing layer 8 prevents the outer cap 3 from loosening.

Further, in such a cap body, even if the portion of the packing layer 8 of the inner plug cap 2 gets wet with the content liquid, the body portion of the inner plug cap 2 and the packing layer 8 are in close contact with each other. The content liquid does not enter in the meantime, and the content liquid is prevented from remaining.

Further, since the packing layer is formed in a state of being in close contact with the main body portion of the inner plug cap 2 by a different material molding method, it is peeled off even if an unreasonable stress is applied in the circumferential direction when the outer cap 3 is screwed on. There is nothing to do. Further, since the tip of the opening-side end 3e is sharp, when the outer cap 3 is used as a measuring cap, the measured content liquid therein can be easily poured from the outer cap 3.

[Advantage of Invention] As described above, in the cap body of the present invention, the inner cap has the outer wall portion forming the container mounting portion that is the mounting portion to the container, and the partition wall connecting the outer wall portion and the opening. , A packing layer made of a soft material formed by a different material molding method on the partition wall, and the opening side end portion of the tip of the engaging portion of the outer cap with the inner plug cap is sharply formed. When the is attached to the inner plug cap, the opening side end of the outer cap abuts against the packing layer and bites into it, so the outer cap and the inner plug cap are in close contact with each other via the packing layer made of a soft material. To do. Therefore, the cap body of the present invention has stable quality with excellent sealing performance even if the dimensional accuracy is slightly low. As a result, the cap body of the present invention is a cap that has a simple structure and a wide tolerance range of dimensional variation and is easy to design and manufacture.

Further, in the cap body of the present invention, since the packing layer is formed by a different material molding method, the packing layer can be tightly and integrally fixed to the outer cap or the inner cap.

Therefore, the cap body of the present invention does not peel or deform the packing layer even if it is subjected to rough handling.
It has a solid structure.

Further, in the cap body of the present invention, since the packing layer is closely adhered to the main body portion, the content liquid does not penetrate into the back surface of the packing layer and is contaminated by the altered residual liquid. It will be a hygienic cap body that will never happen.

Further, in the cap body of the present invention, since the packing layer is formed by the different material molding method, the packing layer can be formed thin. Therefore, according to the present invention, a cap body having a clean appearance can be obtained.

In addition, since the packing layer of the cap body of the present invention is formed by the different material molding method, the number of parts is small and no special structure for fixing the packing layer to the main body portion is required. Therefore, the cap body of the present invention has extremely high productivity.

Further, in the cap body of the present invention, the outer cap attached is prevented from loosening due to the elastic force of the packing layer, so that the container can be reliably sealed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the cap body of the present invention,
FIG. 2 is an enlarged sectional view showing a portion A in FIG. 1, and FIG. 3 is a sectional view showing a conventional cap body. 1 ... container mouth part, 2 ... inner plug cap, 2a ... pouring nozzle, 2b ... vent pipe, 3 ... outer cap, 8 ... packing layer.

Claims (1)

[Scope of utility model registration request] 1. A cap body comprising an inner stopper cap attached to a container mouth and having an opening communicating with an opening of the container mouth, and an outer cap attached to the inner cap to shield the inside of the container from the outside air. In, the inner stopper cap comprises an outer wall portion forming a container mounting portion which is a mounting portion to the container, a partition wall connecting the outer wall portion and the opening, and a soft material formed on the partition wall by a different material molding method. And a packing layer made of a material, the opening side end of the tip of the engaging portion with the inner cap of the outer cap is sharply formed, and when the outer cap is attached to the inner cap, the outer cap is provided. An opening side end portion of the cap body comes into contact with and bites into the packing layer.