Discharge cap

Abstract

Provided is a discharge cap that can smoothly and reliably pierce a film that blocks the mouth of a container body to discharge the contents in the container. A discharge cap (1) is threadedly coupled to the mouth (3a) of a container body (3) blocked by a film (2), and a substantially cylindrical discharge tube (4) is suspended from the lower surface of a top plate portion for penetrating the film to discharge the contents, a left-right asymmetrical cutter (6) is provided on the substantially circumference of the front end of the discharge tube, and a notch (7) is provided on the side of the cutter (6) on the opposite side of the rotation direction of the threaded coupling.

Description

Technical Field

[0001] The invention relates to a discharge cap which is used for being threadedly coupled with the mouth of a container body and piercing a film blocking the mouth to discharge the contents in the container. Background Art

[0002] In the past, the following discharge caps were known: for containers such as bottles or tubes for storing medicines, cosmetics, etc., a film is attached to the mouth to seal the contents, and at the beginning of use, the cap is threadedly connected to the mouth of the container body, and the front end of the discharge tube extending from the lower surface of the top plate of the cap pierces the film to discharge the contents (Patent Document 1). Moreover, such a discharge cap is suitable for airtightness and mass production when threadedly connected to the container body, and therefore, most of them are molded using synthetic resins through molds.

[0003] On the other hand, in recent years, in order to prevent the degradation of the components contained in the contents due to oxidation, etc., a film formed by stacking various thin films has been used. Depending on the film, it is difficult to pierce it with the front end of the resin discharge tube. In addition, even if a cutter is provided on the front circumference of the discharge tube in order to pierce such a film, it is difficult to penetrate or cut the film depending on the shape of the cutter, making it difficult to discharge the contents.

[0004] Therefore, it is important to develop a discharge cap that can smoothly and reliably pierce the film that closes the mouth of the container body and easily discharge the contents in the container.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 10-230960 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] An object of the present invention is to provide a discharge cap that can smoothly and reliably pierce a film that closes the mouth of a container body and easily discharge the contents in the container.

[0010] Solutions for solving problems

[0011] In order to solve the above-mentioned problem, the inventor of the present invention conducted research and found that by providing a cutter at the front end of the discharge tube extending from the lower surface of the top plate portion of the cap, and providing a notch portion on the side of the cutter on the opposite side of the rotation direction of the cap thread, the membrane can be punctured smoothly and reliably, thereby completing the present invention.

[0012] That is, the present invention is a discharge cap, which is threadedly connected to the mouth of a container body blocked by a membrane, and a roughly cylindrical discharge tube is suspended from the lower surface of the top plate portion for penetrating the membrane to discharge the contents. It is characterized in that a cutter with a left-right asymmetrical shape is provided on the approximate circumference of the front end of the discharge tube, and a notch is provided on the side of the cutter on the side opposite to the rotation direction of the threaded connection.

[0013] Furthermore, the discharge cap of the present invention is characterized in that a plurality of cutters having different front end height positions are provided substantially around the front end circumference of the discharge tube.

[0014] Furthermore, the discharge cap of the present invention is characterized in that when the cutter on the substantially circumference of the front end of the discharge cylinder is arranged at a position where it forms a central angle θ of a circle with the cutter serving as a reference, the height position of the front end of the arranged cutter is formed to be located ΔH above the height position of the front end of the reference cutter, and the ΔH is defined by the following formula, wherein the unit of the central angle θ is degree,

[0015] 0<ΔH≤L×θ / 360,

[0016] L: The lead length of the screw thread of the discharge cap that is threadedly engaged with the mouth of the container body.

[0017] Effects of the Invention

[0018] According to the discharge cap of the present invention, the film closing the mouth of the container body can be pierced smoothly and reliably, so that the content in the container can be easily discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : is a diagram showing the structure of the discharge cap ( Figure 1 (a) is a cross-sectional view of the discharge cap, Figure 1 (b) is the appearance diagram of the discharge tube).

[0020] Figure 2 It is a figure which shows the evaluation result of a discharge cap.

[0021] Figure 3 It is a figure which shows the arrangement example of a cutter.

[0022] Figure 4 It is a diagram showing the relationship between the arrangement and height of the cutter.

[0023] Figure 5 It is a schematic diagram showing a state where the cutter pierces the membrane.

[0024] Figure 6 It is a figure (a photograph instead of a drawing) showing the opening of the film. DETAILED DESCRIPTION

[0025] The discharge cap of the present invention is described in detail below. In addition, the connection or installation of the structural member of the present invention is not only a direct connection, etc., but also includes indirect connection by means of other members, etc., as long as the relative positional relationship of the installation parts of the two members to be the object is kept roughly constant, unless otherwise specified, all are included here.

[0026] like Figure 1 As shown, the discharge cap (1) of the present invention is characterized in that the discharge cap (1) is threadedly connected to the mouth (3a) of the container body (3) blocked by the membrane (2), and a roughly cylindrical discharge tube (4) is suspended from the lower surface of the top plate (5) for penetrating the membrane to discharge the contents, and a cutter (6) of a left-right asymmetrical shape is provided on the approximate circumference of the front end of the discharge tube, and a notch portion (7) is provided on the side of the cutter (6) on the side opposite to the rotation direction of the threaded connection.

[0027] The film (2) is used to seal the contents to prevent oxidation and other degradation of the components contained in the container from the completion of the product to the start of use by the user. If it has such a function, the material, shape, installation position, etc. of the film are not particularly limited. Figure 1 , an example of additionally providing a film inside the mouth of the container body is shown, for example, the front end of the mouth of the container body can be heated to melt the resin to form a film to seal the contents. Therefore, the film refers to a film body having a thickness that can be pierced and penetrated by the front end of the discharge tube of the discharge cap, and all such film bodies can be used as the film penetrated by the discharge cap of the present invention.

[0028] The inner surface (1a) of the side wall of the discharge cap (1) and the mouth (3a) of the container body (3) are provided with screws, and the discharge cap is mounted on the container body by engaging the screw threads while rotating the discharge cap in the horizontal direction.

[0029] A discharge tube (4) of a substantially cylindrical shape communicating with the outside extends downward from the lower surface of the top plate (5) of the discharge cap. When the threaded connection of the discharge cap advances toward the mouth of the container body, the discharge tube descends and penetrates the membrane.

[0030] The discharge tube may be any tube that can smoothly penetrate the membrane by horizontal rotation of the discharge cap, and is not limited to a strict cylindrical shape. For example, any tube that is rotationally symmetrical about its axis, such as an elliptical tube or a polygonal tube, may be used.

[0031] A cutter with an asymmetrical shape is provided on the front end of the discharge cylinder (4) on a substantially circumferential surface, and a notch (7) is provided on the side of the cutter on the opposite side of the rotation direction of the threaded connection. Figure 12 shows an embodiment in which the horizontal rotation of the discharge cap during threaded engagement is clockwise when viewed from above. In this embodiment, a notch is provided on the right side of the cutter corresponding to the side opposite to the rotation direction of the threaded engagement.

[0032] By providing the notch in this way, the angle of the front end of the cutter can be reduced, so it is easy to pierce and penetrate the film. In addition, the notch is provided on the side opposite to the rotation direction, but if it is provided on the side in the rotation direction, the vertical section of the notch becomes a resistance, and it is difficult for the cutter to cut the film while moving forward, and the plug opening operation cannot be performed smoothly.

[0033] Figure 2 The results of evaluating the discharge caps with different numbers and shapes of cutters are shown. For the cutter with the notch provided on the side opposite to the rotation direction, good results can be obtained in any evaluation item. In addition, the film opening property of the evaluation item is used to evaluate the ease of piercing and cutting the film so that the discharge tube can pass through the film. The evaluation results are recorded as: ◎, very good; ○, excellent; ×, poor. In addition, the rotation torque is used to evaluate the degree of force required to rotate the discharge cap. The evaluation results are recorded as: ◎, constant rotation torque; ○, approximately constant rotation torque; ×, uneven rotation torque.

[0034] A plurality of cutters with different front-end height positions can be provided on the front end of the discharge tube approximately on the circumference. By providing a plurality of cutters, all membranes can be reliably punctured and penetrated. In addition, by providing a plurality of cutters with different heights, the position at which each cutter punctures the membrane can be adjusted. Thus, the portion that is not cut off and connected to the surrounding can be retained on the membrane, and the following situation can be prevented: the membrane piece that is cut off all around falls into the contents, and the fallen membrane piece enters the connecting hole of the discharge tube during use, making it impossible for the contents to be discharged.

[0035] Figure 3 In Test Examples 1, 3, and 4, where the front end of the main cutter and the front end of the auxiliary cutter are at different heights, it was confirmed that a portion of the film could be left connected to the surrounding area without being cut, thereby preventing the film from falling into the contents.

[0036] Preferably, when the auxiliary cutter is arranged at a position forming a central angle θ of a circle with the main cutter as a reference, the height position of the front end of the auxiliary cutter is formed to be located ΔH above the height position of the front end of the main cutter, and the ΔH is defined by the following formula, and the unit of the central angle θ is degree,

[0037] 0<ΔH≤L×θ / 360

[0038] L: The lead length of the screw thread of the discharge cap that is threadedly engaged with the mouth of the container body.

[0039] The relative position of the secondary cutter with respect to the primary cutter as a reference can be determined by the central angle θ (degrees) of the circle ( Figure 3 ), but by using the center angle θ (degrees) and the lead length L of the spiral of the discharge cap screwed to the mouth of the container body (the distance the spiral advances in the direction of the rotation axis after one rotation), it is possible to schematically indicate to what extent the height position of the front end of the secondary cutter should be arranged above the height position of the front end of the reference primary cutter ( Figure 4 ).like Figure 4 As shown, for example, when the position of the secondary cutter is set to a central angle of 180 degrees relative to the reference main cutter (Test Example 1), it is preferred that the difference (ΔH) between the height position of the front end of the secondary cutter and the height position of the front end of the main cutter is less than 1 / 2 of the lead length (L) of the spiral. By configuring the height of the front end of the secondary cutter in this way, when the discharge cap rotates, the secondary cutter advances at a position deeper than the trajectory of the main cutter piercing and cutting the film, so that the film can be reliably cut.

[0040] On the other hand, as shown in Experimental Example 2, if the height position of the front end of the auxiliary cutter is set to be the same as the height position of the front end of the main cutter (ΔH=0), then Figure 5 As described above, the secondary cutter cuts the film and advances in the same manner as the main cutter at a position rotationally symmetrical to the main cutter. Therefore, when the main cutter rotates 180 degrees, the secondary cutter also rotates 180 degrees in the same manner, and the film is cut around the entire circumference, causing the film piece to fall into the contents.

[0041] Figure 6 The state of the opening of the film after the penetration of Test Example 1 is shown. It was confirmed that the cutter reliably cut the film while leaving a portion connected to the surroundings.

[0042] Description of Reference Numerals

[0043] 1. discharge cap; 1a. inner surface of side wall; 2. membrane; 3. container body; 3a. mouth; 4. discharge cylinder; 5. top plate; 6. cutter; 6a. main cutter; 6b. auxiliary cutter; 6c. auxiliary cutter; 7. notch; 7a. notch; 7b. notch; 7c. notch.

Claims

1. A discharge cap which is threadedly coupled to the mouth of a container body blocked by a film, and has a substantially cylindrical discharge tube suspended from the lower surface of a top plate portion for penetrating the film to discharge the contents, characterized in that: A cutter with a left-right asymmetrical shape is provided on the front end of the discharge cylinder substantially on the circumference, and a notch is provided on the side of the cutter on the opposite side of the rotation direction of the threaded connection. When the cutter on the approximate circumference of the front end of the discharge cylinder is arranged at a position where it forms a central angle θ of a circle with the cutter serving as a reference, the height position of the front end of the arranged cutter is formed to be located ΔH above the height position of the front end of the reference cutter, and the ΔH is defined by the following formula, wherein the unit of the central angle θ is degree, 0<ΔH≤L×θ / 360, L: The lead length of the screw thread of the discharge cap that is threaded with the mouth of the container body, The configured cutter advances at a position deeper than the trajectory of the reference cutter that pierces and cuts the film.

2. The discharge cap according to claim 1, characterized in that: A plurality of cutters having different front end height positions are provided on a substantially circumferential portion of the front end of the discharge cylinder.

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