JP4156283B2 - Liquid container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid container.
[0002]
[Prior art]
As a liquid container, there is known a liquid container including a two-layered container body configured such that the inner layer peels off as the stored liquid decreases and the volume thereof decreases, and a pouring tool attached to the container body. Examples of these pouring tools include those fixed to the container body by means of a mounting cylinder screwed around the outer periphery of the container body neck and neck, and representative examples thereof include those in the form of pumps or in the form of pouring caps. It has been known.
[0003]
These conventional liquid containers are configured such that a through hole is formed at a position below the screw portion of the outer layer of the mouth and neck portion of the container body, and outside air is supplied from there through the gap with the inner layer. That is, when the liquid in the container decreases due to the storage liquid being poured out, the inner layer peels from the outer layer so that the container body is negatively pressurized and its volume is reduced. Conventionally, the through-hole is formed by a so-called punching method in which a rod-shaped cored bar is inserted into the neck of the mouth after the container body is formed, and a cylindrical blade is pressed from the outer surface.
[0004]
[Problems to be solved by the invention]
However, since the drilling of these through holes has a condition that the inner layer is not damaged, a high-precision punching machine is required, but there are still accidents such as cutting defects, the yield is poor, and many cutting wastes are generated. There is also the inconvenience that occurs. Furthermore, if the core bar is too thin, there is a problem that efficient cutting cannot be performed due to problems such as strength, etc., and as a result, it is difficult to manufacture a container body with a very thin diameter, and the size is limited. There is also.
[0005]
The present invention has been made in view of the above points, has a good manufacturing yield, requires extremely less cutting waste during manufacturing than the conventional product, and has the size of the mouth and neck of the container body. The present invention proposes an excellent liquid container that is not so limited and versatile, and that does not change in appearance as compared with conventional products.
[0006]
[Means for Solving the Problems]
The first means is configured as follows. That is, the container body 2 is formed of an outer layer a having a shape-retaining property and a flexible inner layer b that is detachably laminated on the outer layer a while raising the mouth and neck portion 6 from the trunk portion 4 through the shoulder portion 5. In addition, in a liquid container composed of a spout 3 attached to the container body 2 by screwing a mounting cylinder 10 onto the mouth-and-neck portion 6, a slit 24 for introducing outside air between screw threads of the mouth-and-neck outer layer a. And / or a pitch changing portion A in which the pitch of the screw thread of the mouth / neck portion 6 and / or the screw thread of the mounting cylinder 10 is partially changed, and the screw thread corresponding to the pitch changing portion A is screwed. In this case, the slit 24 is widened .
[0007]
The second means is configured as follows. That is, at the first unit, the slit 24 is a slit provided between the threads of the neck outer layer a, the pitch changing part A, the pitch between the thread 7 of the neck 6 This is a pitch changing part with a reduced d, and is configured such that when the mounting cylinder 10 is screwed, the slit 24 is expanded by expanding the screw thread spacing of the neck 6 by the thread 9 of the mounting cylinder .
[0008]
The third means was configured as follows. That is, at the first unit, the slit 24 is a slit provided between the threads of the neck outer layer a, the pitch changing part A, the pitch d between threads 9 of the mounting cylinder 10 The pitch changing portion is configured to enlarge the slit 24 by pushing up the screw thread 7 of the mouth-and-neck portion 6 by the screw thread 9 of the mounting tube 10 when the mounting tube 10 is screwed .
[0009]
The fourth means is configured as follows. That is, in the first means, the container body 2 is a container body in which the inner and outer layers are connected to each other by a pair of opposed band-like adhesive portions 8 that are vertically arranged from the upper end to the center of the bottom portion, and the slit 24 is A pair of slits provided between the threads of the neck 6 of the mouth and neck 6 located between the adhesive parts 8 and between the threads of the neck 6 of the mouth and neck 6 located between the other adhesive parts 8. but the pitch changing portion having a reduced pitch between threads 7 of the mouth-and-neck portion 6, a pair of pitch changing portion in which the large pitch between the thread 9 of the mounting cylinder 10, the screw thread 7 of the neck 6 One of the slits 24 is widened by pushing the gap between the screw threads of the pitch changing portion with a small pitch between the screw threads 9 of the mounting cylinder when the mounting cylinder 10 is screwed. By the thread 9 of the pitch change part which increased the pitch of It was composed as expanding the other slit 24 by pushing up the thread 7 of the neck 6 when screwing the wear sleeve 10.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
The liquid container 1 of the present invention includes a container body 2 and an extraction tool 3.
[0012]
The container body 2 is formed of a synthetic resin or the like, and the neck portion 6 is erected from the upper end edge of the cylindrical body portion 4 via the shoulder portion 5, and the outer layer a having a retaining shape is formed. A flexible inner layer b is formed, and a screw thread 7 is provided around the outer surface of the mouth-and-neck portion 6. In the illustrated example, a stepped portion is formed in the shoulder portion 5 and a reduced diameter portion is formed in the upper portion in order to impart a sealing property to the dispensing cap described later.
[0013]
Further, as shown in FIG. 2, the container body 2 may be one in which the inner and outer layers are connected by a belt-like adhesive portion 8 provided vertically from the upper end to the bottom center. The container body 2 in the illustrated example shows an example in which a pair of band-shaped adhesive portions 8 are provided at 180 degrees apart. When such a container body 2 is used, the inner layer b can be uniformly contracted after the liquid is poured out, and the stored liquid can be discharged without waste.
[0014]
As long as the dispensing tool 3 is one in which a mounting cylinder is screwed to the mouth and neck of the container body, the dispensing tool 3 is configured to pour the liquid by squeezing the container body or by inverting the container. Alternatively, it may be in the form of a pump that sucks up and ejects the liquid in the container.
[0015]
The pouring tool 3 in the illustrated example is in the form of a pouring cap, and a mounting tube 10 having a thread 9 on its inner periphery is screwed to the outer periphery of the mouth neck 6 and extends inward from the upper end of the mounting tube 10. A nozzle 12 is erected at the center of the top plate 11 provided, and a discharge valve 13 is provided at the base end of the nozzle 12 so that the neck 6 and the nozzle 12 communicate with each other unilaterally. An external air introduction valve 14 is provided at the upper end of the mounting cylinder 10 so that the outside and the threaded portion communicate with each other. Further, the lower end portion of the outer peripheral wall 15 suspended in a double cylinder shape from the upper outer periphery of the mounting cylinder 10 is closely fitted to the outer periphery of the reduced diameter portion so as to achieve airtightness in this portion, and the screwed portion is the outside air introduction valve 14 It is configured not to communicate with the outside in other parts.
[0016]
More specifically, the above-described configuration is formed by providing a closing member and a valve member at the upper end in the mounting cylinder 10. The closing member extends from the lower end edge of the fitting cylinder part 16 fitted to the inner peripheral upper end part of the mounting cylinder 10 with a covering plate 17 covering the upper end opening of the mouth neck 6 and a valve hole in the center of the covering plate 17 18 is formed, and a communication hole 19 for communicating the upper and lower sides of the cover plate 17 with the fitting tube portion 16 is formed.
[0017]
Further, the valve member has a lower end portion fitted to the center portion of the upper surface of the covering plate 17 and a valve plate that closes the valve hole 18 from the inner surface of the cylindrical portion 20 having the upper end portion fitted to the lower end portion of the nozzle 12. A discharge hole 13 is formed by projecting 21, and an annular intake valve plate 22 having a peripheral edge pressed against the lower surface of the top plate 11 is extended from the outer periphery of the cylindrical portion 20, and a through hole is formed in the top plate 11. The outside air introduction valve 14 is formed by closing 23 so as to be openable and closable. The nozzle 12 is composed of two members, and a skirt-like cover is extended from the outer periphery.
[0018]
In the present invention, in this kind of liquid container, a slit 24 for introducing outside air is formed between the threads of the outer layer of the mouth and neck part a, and either the mouth neck part 6 or the mounting cylinder 10 or the mouth neck part. A pitch changing portion A in which the pitches of the screw threads of both 6 and the mounting cylinder 10 are partially changed is provided. As a specific method of partially changing the pitch, the interval between the same thread threads facing each other can be narrowed or widened by changing the inclination angle of the thread threads of that part. Therefore, in this case, the changed portion does not change with the same width but changes sequentially. It is also possible to carry out by projecting a protrusion on the lower surface or upper surface of the screw thread at a predetermined position. The slit 24 closed before the mounting cylinder 10 is screwed due to the presence of the pitch changing portion A is configured to expand when the mounting cylinder 10 is screwed.
[0019]
In forming the slit 24, various methods can be adopted. However, the slit 24 can be formed by post-processing after the container body is formed. For example, by using a processing knife 25 as shown in FIG. It can be formed by pressing and cutting in a state in which the core bar is inserted into. When the slit 24 is used as the outside air introduction hole, the cutting thread is extremely small compared to the conventional perforation by punching, and the screw thread corresponding to the pitch changing part even if there is an uncut part in part. Therefore, it is possible to surely widen by the action, so that accuracy such as the pressing width of the machining blade is not so required.
[0020]
In the embodiment of FIG. 1 shows the case of providing the slit 24 between the threads of the neck outer layer a, as shown in this case Figure 4 (a), was small comb pitch d of the threads (4 ( provided d ₁₎ pitch changing portion a of a), as shown in FIG. 4 (b), press more between threads 7 of the mouth-and-neck portion 6 septum the threads 9 of the mounting cylinder 10 when screwed in mounting tube 10 The slit 24 is configured to be widened by widening (d _{2 in} FIG. 4B). FIG. 5 is an explanatory schematic view of this part as seen from the front, in which the inclination angle of the screw thread lower end 7a in the mouth-and-neck part 6 is changed to be small and the screw thread of the mounting cylinder 10 between the same screw thread 7 facing each other. 9 is forcibly press-fitted, and the screw threads 7 and 7a of the mouth-and-neck portion 6 expand, and the slit 24 opens accordingly.
[0021]
Further, only set the slit 24 between the threads of the neck outer layer a, as shown in the description schematically in FIG. 6, by increasing the inclination angle of the threads upper end 9a of the mounting cylinder 10, the pitch between the thread 9 It is preferable to provide a pitch changing part A having a larger diameter and to push up the thread 7 of the neck 6 by the thread 9 of the mounting cylinder 10 when the mounting cylinder 10 is screwed.
[0022]
Further, when describing the case of using the container body 2 provided with a strip-shaped adhesion portion 8 as shown in FIG. 2, the inter-thread of the mouth-and-neck portion 6 located between one of the adhesive portion 8, the other adhesive portion 8 a pair of slits and between thread of the mouth-and-neck portion 6 located between, and the pitch changing portion having a reduced pitch between threads 7 of the mouth-and-neck portion 6, between the threads 9 of the mounting cylinder 10 a pair of pitch changing portion having an increased pitch is provided, as well as expanding the one of the slits 24 by pushing the screw Koyama interval neck 6 by thread 9 of the mounting cylinder when screwing the mounting cylinder 10, It is preferable that the other slit 24 is expanded by pushing up the screw thread 7 of the mouth and neck portion 6 by the screw thread 9 of the mounting cylinder 10.
[0023]
FIG. 7 shows another example of the pitch changing portion A, and the pitch changing portion A in the form of the protrusion 26 is provided on the screw thread 7 of the mouth / neck portion 6.
[0024]
【The invention's effect】
As described above, since the liquid container of the present invention has the above-described configuration, the slit 24 of the container body 2 has a simple configuration and can be easily cut. Even a thin metal core can sufficiently withstand the impact. Application to a container body with a small mouth and neck is also possible, and even if there is a part of the slit 24 of the container body 2 in a connected state, it can be separated and securely opened by screwing the mounting cylinder 10 Therefore, the rate of defective products can be reduced more reliably, and since it can be formed by a simple structural change in which the pitch of a part of the screw portion is changed, manufacturing is not complicated.
[0027]
Further, since the container of the fourth means is provided with the band-shaped adhesive portion 8, it has the advantage that the contraction state of the inner layer b that contracts as the liquid is poured out can be made uniform and the liquid can be discharged without waste. .
[Brief description of the drawings]
FIG. 1 is a partially cut-out half sectional view showing an embodiment of the present invention.
FIG. 2 is a perspective view showing another example of the container body of the present invention.
FIG. 3 is a perspective view showing an example of a cutting blade used for slit forming of the present invention.
FIG. 4 is an explanatory diagram for explaining the operation of the present invention.
5 is an explanatory schematic view of the pitch changing portion of FIG. 4 as viewed from the front.
FIG. 6 is an explanatory schematic diagram for explaining the operation of the present invention.
FIG. 7 is a partial schematic view showing another example of the pitch changing unit in the present invention.
[Explanation of symbols]
2 ... container body, 3 ... pouring tool, 4 ... trunk, 5 ... shoulder, 6 ... mouth and neck,
7 ... Screw thread in the neck of the neck, 8 ... Strip-bonded part, 9 ... Screw thread on the mounting tube, 10 ... Screw tube,
24 ... Slit, 26 ... Projection, A ... Pitch changing part, a ... Outer layer, b ... Inner layer,
d ... Pitch

Claims (4)

A container body 2 comprising an outer layer a having a shape-retaining property and a flexible inner layer b detachably laminated on the outer layer a while standing up the mouth and neck portion 6 from the trunk portion 4 through the shoulder portion 5; In a liquid container comprising a spout 3 attached to the container body 2 by screwing a mounting cylinder 10 onto the mouth-and-neck portion 6, a slit 24 for introducing outside air is formed between screw threads of the outer-portion-portion outer layer a. At the same time, a pitch changing portion A in which the pitch of the screw thread of the mouth and neck portion 6 and / or the screw thread of the mounting cylinder 10 is partially changed is provided, and when the screw thread corresponding to the pitch changing portion A is screwed. A liquid container characterized in that the slit 24 is widened. The slit 24 is a slit provided between the threads of the mouth-and-neck part outer layer a, and the pitch-changing part A is a pitch-changing part in which the pitch d between the threads 7 of the mouth-and-neck part 6 is reduced. The liquid container according to claim 1, wherein the slit 24 is expanded by pushing and widening the screw thread interval of the mouth and neck portion 6 by the screw thread 9 of the mounting cylinder when the screw 10 is screwed. The slit 24 is a slit provided between the threads of the mouth-and-neck outer layer a, and the pitch changing section A is a pitch changing section in which the pitch d between the threads 9 of the mounting cylinder 10 is increased. 2. The liquid container according to claim 1, wherein the slit is opened by pushing up the screw thread of the mouth and neck portion by the screw thread of the mounting cylinder. The container body 2 is a container body in which the inner and outer layers are connected to each other by a pair of opposed belt-like adhesive portions 8 that are vertically arranged from the upper end to the center of the bottom, and the slit 24 is located between the one adhesive portion 8. It is a pair of slits provided between the screw threads of the neck 6 and between the threads of the mouth neck 6 positioned between the other bonding parts 8, and the pitch changing part A is between the threads 7 of the mouth neck 6. A pitch changer with a smaller pitch and a pair of pitch changer with a larger pitch between the threads 9 of the mounting cylinder 10 and a screw of the pitch changer with a smaller pitch between the threads 7 of the neck 6 When the mounting cylinder 10 is screwed, the one of the slits 24 is widened by pushing the mounting cylinder 10 with the thread 9 of the mounting cylinder, thereby increasing the pitch between the threads 9 of the mounting cylinder 10. 9, when the mounting cylinder 10 is screwed, Liquid container according to claim 1, wherein the as configured expanding the other slit 24 by pushing up the Koyama 7.

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