JP5637596B2 - Spout container - Google Patents

Description

  The present invention relates to an ejection container for a liquid material (including cream as well as liquid), and more particularly to a trigger type ejection container.

  As a trigger-type ejection container, a cap-shaped member is provided with a small-diameter upper half raised from a lower-diameter large part fitted to the mouth-neck part of the container body via a flange-like wall. A cylinder having a flange sandwiched between walls is suspended in the container body, a stem that is continuous with the nozzle of the front opening is erected from a cylindrical piston that can slide inside the cylinder, and the top of the cap-shaped member It is known that a connecting piece erected from the upper half to the rear is attached with a rear end of an operation member having a trigger at the front, and an intermediate portion of the operation member in the front-rear direction on the stem.

  In this type of trigger-type ejection container, as shown in FIG. 4, the cylinder wall of the cylinder is extended upward from the flange portion A, and the extension portion E is thickened and fitted into the upper half of the cap-shaped member. The thing which enlarged the fitting strength of a cylindrical member and a cylinder is proposed (patent document 1).

JP-A-2005-288344

  In the container of Patent Document 1, since the extension part E of the cylinder cylinder wall above the collar is thickened, sink marks are formed on the cylinder inner surface during molding, and the sealing performance between the cylindrical piston and the cylinder is reduced. there's a possibility that. Such molding inconvenience is likely to occur when an engaging protrusion for connecting the cylinder and the cap-shaped member is formed on the surface of the cylinder.

  Therefore, conventionally, the cylindrical piston is made of an elastic material such as rubber so that even if the inner surface of the cylinder is distorted, the cylindrical piston is elastically deformed so that a gap with the inner surface of the cylinder is not generated. Has been done.

  However, in order to reduce the material cost, it is preferable to form the cylindrical piston with synthetic resin rather than rubber. Depending on the nature of the contents, synthetic resin may be preferable to rubber.

  The first object of the present invention is to prevent the occurrence of sink marks on the cylinder inner surface that hangs down from the inside of the cap-shaped member of the ejection container, thereby reducing the sealing performance between the cylindrical piston of the operating member and the cylinder inner surface. It is to be.

  The second object of the present invention is to insert a reinforcing cylinder between the connecting cylinder portion of the ejection container and the cylinder so that the cylinder wall of the cylinder can be thinned. Thus, even if the cylindrical piston of the operating member is made of synthetic resin, the sealing performance between the cylindrical piston and the cylinder is not impaired.

The first means is
A container body 2 that stands up the mouth and neck 6;
A cap in which a small-diameter connecting tube portion 16 is erected from a large-diameter mounting tube portion 12 fitted to the outer surface of the mouth-and-neck portion 6 via a flange-like wall 14 and a connecting piece 24 protrudes upward and rearward from the connecting tube portion. Shaped member 10;
A cylinder 40 that hangs down from the inside of the connecting cylinder portion 16 into the container body;
An actuating member 50 having a stem 54 standing upward from a cylindrical piston 52 capable of moving up and down in the cylinder and projecting a nozzle 58 forward from the upper end of the stem;
An operation member 64 provided with a trigger 72 pivotally attached to the front portion of the connecting piece 24 and extending downward to the front side of the stem;
In the ejection container formed by pivotally attaching the upper portion of the stem 54 and the corresponding portion of the operation member 64 and capable of moving the operation member 50 up and down by operating the trigger ,
The cylindrical piston 52 is formed of a synthetic resin,
A reinforcing member 32 having a reinforcing tube 32 fitted between the connecting tube portion 16 and the upper portion of the cylinder 40 and a flange 34 attached to the lower portion of the reinforcing tube 32 is provided.
The collar 34 is sandwiched between the neck 6 and the flange-like wall 14, and the reinforcing cylinder 32 is engaged with the connecting cylinder 16 to act on the connecting cylinder 16 by operating the trigger. The reinforcing cylinder 32 and the flange portion 34 are configured to resist stress.

This means proposes that a reinforcing cylinder 32 of the reinforcing member 30 is provided between the connecting cylinder portion 16 of the synthetic resin cap-shaped member and the cylinder 40 as shown in FIG. The flange 34 attached to the lower end of the reinforcing cylinder 32 is sandwiched between the flange-like wall and the mouth and neck, and when a force acts in the direction of tilting the stem of the container of the present application, Resist with the reinforcement tube and the collar. Therefore, sufficient strength can be secured, and a part of the cylinder and the cap-like member can be prevented from coming off. Since it is not necessary to make the cylinder wall thick to ensure strength, it is possible to suppress the occurrence of sink marks on the inner surface of the cylinder, and even if the cylindrical piston is made of synthetic resin, the sealing performance is not impaired. . Moreover, this means proposes that the reinforcing member of the present application is applied to a trigger type ejection container. This is because this type of container has a strong stress acting on the connecting cylinder when the trigger is operated, and therefore, it is significant to provide a reinforcing member.

  The “spout container” is preferably a trigger-type spout container, but is not limited thereto. The “reinforcing tube” has rigidity and strength to reinforce the connecting tube portion together with the flange portion. In the illustrated example, only the upper portion of the reinforcing cylinder is fitted into the cylinder, but the entire vertical width of the reinforcing cylinder may be fitted into the cylinder. “Sink” refers to a dent caused by the surface being pulled by contraction of a portion delayed in cooling, such as a central portion or a thick portion of the molded product, because the synthetic resin contracts due to an inherent molding shrinkage rate ( "Illustrated Plastic Glossary of Terms" (Publisher: Nikkan Kogyo Shimbun)

  The second means includes the first means, and the first engaging strip 18 and the second engaging strip 36 that are fitted to each other are laterally disposed on the outer surface of the reinforcing tube 32 and the inner surface of the connecting tube portion 16. Has been established.

  This means proposes a first engaging strip 18 and a second engaging strip 36 that are provided laterally on the reinforcing tube 32 and the connecting tube portion 16. These engaging strips are fitted to each other so as to unite the reinforcing member with the cap-shaped member and exert a large resistance against external force. Since the engaging strip is provided on the reinforcing member that is separate from the cylinder, the size of each engaging strip can be freely designed. This will be described later.

The third means has the second means , and
The first engaging strip 18 corresponds to at least the front wall portion and the rear wall portion of the connecting tube portion 16 below the protruding portion of the connecting piece 24, and the second engaging strip 36 corresponds to the first engaging strip. Each was formed in a reinforcing cylinder part.

According to the first aspect of the invention, the reinforcing cylinder 32 is provided between the connecting cylinder portion 16 of the cap-shaped member and the cylinder 40, and the flange 34 attached to the lower end of the reinforcing cylinder 32 is connected to the flange-shaped wall and the mouth. Since it is sandwiched between the neck and the neck, it is not necessary to make the upper part of the cylinder thick to ensure strength. Therefore, there is no sink on the inner surface of the cylinder, and even if the cylindrical piston is formed of a synthetic resin material, it is possible to prevent deterioration of the sealing performance between the piston and the cylinder due to “sink” of the cylinder.
According to the first aspect of the invention, a part of the stress acting on the connecting cylinder portion when the trigger is pulled can be shared by the reinforcing cylinder 32 instead of the thin cylinder 40.

  According to the invention relating to the second means, the first engaging strip 18 and the second engaging strip 36 that are mutually engaged with the reinforcing tube 32 and the connecting tube portion 16 formed separately from the cylinder 40 are provided. The engagement force can be increased.

It is a principal part longitudinal cross-sectional view of the ejection container which concerns on 1st Embodiment of this invention. It is a top view of the container of FIG. It is explanatory drawing of the use condition of the container of FIG. It is sectional drawing of a conventional container.

  1 to 3 show an ejection container according to a first embodiment of the present invention. This ejection container is formed by the container body 2, the cap-shaped member 10, the reinforcing member 30, the cylinder 40, the operating member 50, the rod-shaped member 60, and the operation member 64. Each of these members can be formed of a synthetic resin material unless otherwise specified.

  The container body 2 stands up from the trunk 4 shown in FIG.

  The cap-shaped member 10 erects a small-diameter connecting cylinder part 16 through a flange-like wall 14 from a large-diameter mounting cylinder part 12 screwed into the outer surface of the mouth-and-neck part 6.

  It is preferable that a concave first engagement strip 18 is provided around the inner surface of the lower portion of the connecting tube portion 16. This will be described later. The connection cylinder part 16 has the intensity | strength which supports the below-mentioned cylinder and can resist the stress by trigger operation.

  Further, a tapered cylindrical portion 20 having a small upper end is projected upward and inwardly from the upper end of the connecting cylindrical portion 16, and a guide cylindrical portion 22 is extended vertically from the upper end of the tapered cylindrical portion.

  Furthermore, from the rear surface of the connection cylinder part 16 and the taper-shaped cylinder part 20, the connection piece 24 is extended back up. In the illustrated connecting piece 24, the rear ends of the pair of left and right connecting plates are continuous, and a first pivot shaft 26 is attached to the inner surface of the upper end of each connecting plate.

  The reinforcing member 30 is provided with a collar 34 at the lower end of the reinforcing cylinder 32. The reinforcing cylinder 32 is fitted to the inner surface of the connecting cylinder 16 and the collar 34 is connected to the mouth and neck through a packing. 6 is placed between the mouth and neck 6 and the flange-like wall 14.

  The reinforcing member 30 has a role of reinforcing the connecting cylindrical portion 16 of the cap-shaped member. The connecting cylinder part 16 has a role of connecting the mounting cylinder part together with the connecting piece 24 and the first pivoting shaft at the tip of the connecting piece, and a large stress acts by lever action when the trigger is pulled as will be described later. Because it does.

  In a preferred example of illustration, a convex second engaging strip 36 is provided around the lower outer surface of the reinforcing cylinder 32 and is fitted to the first engaging strip 18. Thereby, for example, when a trigger operation described later is performed, even if stress acts on the front and rear wall portions of the connecting cylinder portion, a part of the force is passed through the first engagement strip 18 and the second engagement strip 36. And can be supported by the reinforcing member 30.

  Here, in the prior art shown in FIG. 4, if the engagement protrusion R for pressure contact is provided on the surface of the thickened extension portion E of the cylinder, a concave sink mark is formed on the inner surface of the cylinder opposite to the engagement protrusion. May occur. Therefore, even if the engagement protrusion is provided, it is necessary to reduce the protrusion length of the engagement protrusion from the cylinder inner surface. On the other hand, in the configuration of the present application, since the convex second engaging strip 36 is formed in the reinforcing cylinder 32 which is a separate body from the cylinder 40, the inconvenience of causing a sink on the sliding surface of the cylindrical piston is not considered. Thus, there is an advantage that the dimension of the second engagement strip 36 can be designed.

  The structure of the first engagement strip 18 and the second engagement strip 36 can be changed as appropriate. For example, the first engagement strip can be a convex strip and the second engagement strip can be a concave strip. Further, these engagement strips can be formed intermittently in the circumferential direction, for example, only on the front wall and the rear wall of the connecting tube portion and the reinforcing tube. Moreover, you may abbreviate | omit these 1st engagement strips and 2nd engagement strips.

  Further, a contact rib 38 for contacting a cylinder, which will be described later, is provided vertically at an intermediate portion in the vertical direction of the reinforcing cylinder 32. This will be described later.

  The cylinder 40 is suspended inside the container body 2 by engaging an outwardly extending portion 42 attached to the upper end of the cylindrical wall 44 with the upper end surface of the reinforcing cylinder 32. A suction valve 46 is provided at the lower portion of the cylinder, and a suction pipe is fitted into a fitting cylinder portion extending downward from the suction valve.

  In the illustrated example, a cylinder cylinder wall 44 forming a pump chamber is formed from a lower part to an upper part into a small diameter part 44a, an intermediate diameter part 44b, and a large diameter part 44c, and the large diameter part 44c is formed on the entire upper circumference of the reinforcing cylinder. At the same time, the abutting rib 38 of the reinforcing cylinder 32 is brought into contact with the middle diameter portion 44b. A vent hole 48 is formed at an appropriate position of the medium diameter portion 44b. However, the configuration can be changed as appropriate.

  The cylinder wall 44 of the cylinder 40 has the following structure in order to minimize sink marks and distortions during molding.

  The first structure is that at least a portion (in the illustrated example, the medium diameter portion 44b) that is in sliding contact with the cylindrical piston is thin and has a constant thickness. This is because, as described above, sink marks are likely to occur in the thick part (for example, see the upper part of the cylinder of the conventional container in FIG. 4). This first structure is realized by interposing the reinforcing cylinder 32 between the upper part of the cylinder 40 and the connecting cylinder part 16 as described above.

  The second structure is that the outer surface of the portion of the cylinder tube wall 44 that is in sliding contact with the cylindrical piston is a vertical flat surface and is not provided with irregularities such as engaging protrusions. This is because the portion provided with the convex portion is relatively thicker than the surrounding portion, and sink marks are generated on the inner surface of the cylinder opposite to the convex portion. In this second structure, a second engagement strip 36 that engages with the first engagement strip 18 of the connecting tube portion 16 is formed on the outer surface of the reinforcing tube 32, and the cylinder 40 is simply a flange on the top of the tube wall 44. This is realized by allowing the portion 34 to be suspended from the upper end of the reinforcing cylinder 32.

  Further, the lower end portion of the guide cylinder portion 22 is inserted into the cylinder 40 so as to lock the upper surface of a cylindrical piston 52 described later.

  The actuating member 50 has a cylindrical piston 52 that slides on the middle diameter portion 44b of the cylinder 40. An injection cylinder 56 extends forward from a stem 54 that stands up from the cylindrical piston, and is attached to the tip of the injection cylinder. The nozzle 58 is opened. A discharge valve (not shown) is provided inside the injection cylinder.

  In the illustrated example, the cylindrical piston 52 has a pair of upper and lower skirt portions that are separated from the stem 54 and extend upward and outward and downward in the outer periphery thereof. However, the shape can be changed as appropriate. The cylindrical piston 52 is made of synthetic resin.

  From the lower part of the small-diameter part 44a of the cylinder cylinder wall 44, the rod-shaped member 60 stands up to the vicinity of the upper part of the stem. A large diameter upward stepped portion is formed in the lower portion of the rod-like member with a liquid flow path between the cylinder and a coil spring 62 is interposed between the upward stepped portion and the cylindrical piston.

  The operation member 64 pivotally supports the inner surfaces of the rear portions of the left and right side plates 68 of the cover 66 covering the upper portion of the operating member 50 on the first pivot shaft 26, and inserts an injection cylinder into the front portion of the cover 66. 70 is opened, and a trigger 72 is extended from the front of the left and right side plates 68 to the lower front side. Further, the left and right sides of the stem 54 and the left and right side plates 68 are formed with a second pivot shaft 74 and a bearing engaged therewith so that the operating member 50 can be moved up and down by operating a trigger.

  In the above configuration, the inside of the container body 2 has an outside air introduction path 80 formed by a gap between the reinforcing cylinder 32 and the middle diameter part 44 b of the cylinder, and a gap between the vent hole 48, the stem 54 and the guide cylinder part 22. It communicates with the outside through.

  When the trigger 72 is pulled from the state shown in FIG. 1, the operation member 64 is rotated about the first pivot shaft 26 and the stem 54 is lowered. At this time, by pulling the trigger 72, stress acts on both the front and rear sides of the connecting tube portion 16 as shown by arrows in FIG. 3, but the flange portion 34 of the reinforcing tube 32 is located between the mouth neck portion 6 and the flange-like wall 14. Since the auxiliary cylinder 32 resists the stress together with the connecting cylinder portion 16 because of being sandwiched between the cylinders, sufficient strength as a container is obtained, and a part of the cylinder is separated from the cap-shaped member on the side receiving the upward stress. It can be prevented from coming off.

  Further, in order to ensure the strength of the container, the reinforcing member 30 with the reinforcing cylinder 32 is provided in place of increasing the thickness of a part of the cylinder cylinder wall 44, so that the cylinder is thinned to suppress the occurrence of sink marks on the cylinder inner surface. The inner surface can be a smooth vertical surface. Therefore, a sufficient sealing performance can be secured even with a cylindrical piston made of synthetic resin.

DESCRIPTION OF SYMBOLS 2 ... Container body 4 ... Torso part 6 ... Mouth neck part 10 ... Cap-shaped member 12 ... Mounting cylinder part 14 ... Flange-like wall 16 ... Connection cylinder part 18 ... 1st engaging strip 20 ... Tapered cylindrical part 22 ... Guide cylinder Numeral 24 ... Connecting piece 26 ... First pivot shaft 30 ... Reinforcing member 32 ... Reinforcing cylinder 34 ... Bridge 36 ... Second engaging strip 38 ... Abutting rib 40 ... Cylinder 42 ... Outwardly projecting portion 44 ... Cylinder cylinder wall 44a ... Small diameter portion 44b ... Medium diameter portion 44c ... Large diameter portion 46 ... Suction valve 48 ... Vent hole 50 ... Actuating member 52 ... Cylindrical piston 54 ... Stem 56 ... Injection cylinder 58 ... Nozzle 60 ... Rod-like member 62 ... Coil spring
64 ... Operation member 66 ... Cover 68 ... Side plate 70 ... Insertion hole 72 ... Trigger 74 ... Second pivot shaft 80 ... Outside air introduction path A ... Hump E ... Extension part F ... Flange-like wall R ... Engagement ridge

Claims (3)

A container body (2) that stands up the mouth and neck (6);
The neck portion (6) is erected from the large-diameter mounting tube portion (12) fitted to the outer surface via the flange-like wall (14), and the small-diameter connecting tube portion (16) is erected from the connecting tube portion. A cap-like member (10) protruding from the connecting piece (24) ,
A cylinder (40) suspended from the inside of the connecting tube portion (16) into the container body;
An operating member (50) having a stem (54) standing upward from a cylindrical piston (52) capable of moving up and down in the cylinder and projecting a nozzle (58) forward from the upper end of the stem; ,
An operating member (64) provided with a trigger (72) pivotally attached to the tip of the connecting piece (24) and extending downward to the front side of the stem;
An ejection container formed by pivotally attaching the upper portion of the stem (54) and the corresponding portion of the operating member (64) and capable of moving the operating member (50) up and down by operating a trigger .
The cylindrical piston (52) is formed of a synthetic resin,
A reinforcing member (30) having a reinforcing cylinder (32) fitted between the connecting cylinder part (16) and the upper part of the cylinder (40) and having a flange part (34) attached to the lower part of the reinforcing cylinder (32). )
The collar (34) is sandwiched between the mouth and neck (6) and the flange-like wall (14), and the reinforcing cylinder (32) is engaged with the connecting cylinder (16), thereby triggering The ejection container is configured to resist the stress acting on the connecting tube portion (16) by the operation of the reinforcing tube (32) and the flange portion (34) . A first engaging strip (18) and a second engaging strip (36) that are fitted to each other are provided laterally on the outer surface of the reinforcing tube (32) and the inner surface of the connecting tube portion (16). The ejection container according to claim 1. The first engagement strip (18) is connected to at least the front wall portion and the rear wall portion of the connecting tube portion (16) below the protruding portion of the connection piece (24), and the second engagement strip (36) is The ejection container according to claim 2, wherein the ejection container is formed in a reinforcing cylinder portion corresponding to the first engagement strip .