JP2004315008A - Cap for spout, and manufacturing method for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout used for a paper container capable of easily determine whether or not a cap is opened. <P>SOLUTION: A cap 13 which is screwed and fitted to a spout body 12 comprises a cap body 13A and a pilfer-proof band 13B connected to a lower end of the cap body via a small connection part 13f, and the pilfer-proof band 13B is not detached but left behind when the cap body 13A is opened. By forming a carton stopper 13h to temporarily stop a spout 11 to a carton 5 on an outer circumferential surface of a lower end of the cap 13, the height of the cap 13 is increased without excessively increasing the height of the entire spout, and the height required for the cap body is ensured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cap used for a spout to be attached to a paper container (hereinafter referred to as a carton) for containing milk, juice, alcohol, and the like, and a method for producing the same.
[0002]
[Prior art]
Conventionally, as shown in FIG. 13, a carton 5 to which a spout 1 is attached has been widely used. The spout 1 includes a spout body 2 and a cap 3 as shown in FIG. The spout body 2 includes a flange portion 2a for sticking to the back surface of the carton 5, a cylindrical nozzle portion 2b that penetrates a spout mounting hole 6 formed in the carton 5 and projects outside the carton, A shielding portion 2c for closing the portion 2b, an opening groove 2d provided so that a part of the shielding portion 2c can be easily opened, and a region surrounded by the opening groove 2d connected via a support portion 2e. Pull ring 2f and the like. Further, the nozzle portion 2b has a boss portion 2ba fitted into the spout mounting hole 6 of the carton 5, and several carton stoppers arranged in the upper end region of the outer periphery of the boss portion 2ba at intervals in the circumferential direction. 2bb and a screw thread 2bc for screw-fitting the cap 3 are formed. The cap 3 has a top plate 3a and a cylindrical body 3b, and a thread 3bc is formed on an inner surface thereof. In order to attach the spout 1 to the carton 5, the cap 3 of the spout 1 and the nozzle 2 b are inserted into the spout mounting hole 6 of the carton 5 while the cap 3 is attached to the spout body 2. 5 and temporarily fixed to the carton 5 with the carton stopper 2bb, and in this state, the flange portion 2a and the carton are joined by ultrasonic sealing or heat sealing using a hot plate.
[0003]
[Problems to be solved by the invention]
By the way, in this kind of spout, even if the cap 3 is once removed and the spout body 2 is opened, if the cap 3 is tightened to the nozzle part 2b of the spout body 2 as before, the appearance becomes the cap. It is no different from before opening. For this reason, for example, even if someone removes the cap from the carton spout at the storefront and performs tampering such as opening, if the cap is restored, it is indistinguishable, and if there is tampering, There was a problem that it could not be recognized. Therefore, in some cartons, the entire carton including the spout is shrink-wrapped to prevent opening by mischief.However, shrink-wrapping not only increases costs but also causes trouble in the process. There was a problem that it was easy.
[0004]
The present invention has been made in view of the above problems, and provides a spout cap having a so-called pill fur proof property, which makes it possible to easily determine whether or not the cap is opened without shrink wrapping. As an issue.
[0005]
[Means for Solving the Problems]
According to the present invention, in order to easily identify whether or not the cap is opened, the cap is attached to the spout body by screw fitting, and the lower end thereof (in this specification, the cap or the spout body is used). Expressions such as “up,” “down,” etc. shall refer to a state in which the spout 1 is placed as shown in FIG. 14) via a connection portion that can be broken when the cap body is opened. In addition, the pill fur proof band has a structure that cannot be removed from the spout body, and a plurality of projections serving as carton stoppers are formed on the outer peripheral surface of the pill fur proof band. . With this configuration, when the cap is opened, the connecting portion is broken, so that the presence or absence of the opening can be easily discriminated. Further, since the carton stopper is provided on the cap side, it is not necessary to provide the carton stopper on the spout body side, and accordingly, the boss portion (portion indicated by reference numeral 2ba in FIG. 14) provided on the spout body can be lowered. The height of the cap can be increased without increasing the overall height of the spout when attached to the carton. For this reason, even if the cap is divided into the cap body and the pill fur proof band, the height required for the cap body can be secured. In general, the height of the spout attached to the carton cannot be so large due to the packaging of the carton. Therefore, if the cap having the same height as the conventional cap 3 shown in FIG. 14 is attached to the cap body and the pill fur proof band. If the cap is divided, the height of the cap body will be low and the handle will be short, making it difficult to grasp the cap, reducing the overrun torque due to the small number of screw fitting parts, and stabilizing the opening torque. Although problems such as lowering and the possibility of loosening of the cap during transportation occur, the present invention avoids these problems by providing a carton stop on the cap.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The basic configuration of the spout cap of the present invention includes a cap body that is screw-fitted to a nozzle portion of a spout body that constitutes a spout, and a connecting portion that can be broken when the cap is opened at the lower end of the body of the cap body. The pill fur proof band is integrally connected via a pill fur proof band, and the pill fur proof band is provided with a plurality of blades which are locked to the nozzle portion on the inner peripheral surface to prevent the nozzle from coming off, and are cartoned on the outer peripheral surface. It is characterized by having a plurality of projections.
[0007]
The cap of this embodiment may be manufactured into a final shape only by molding, that is, the cap body and the pill fur proof band may be manufactured to be connected via a connecting portion. And a pill fur proof band formed in a form connected over the entire circumference, and then separated by slitting the boundary between the body of the cap main body and the pill fur proof band except for the connecting portion. Is preferred. With this configuration, the body of the cap body and the pill fur proof band can be separated by a slit with a small thickness, and the slit is not very noticeable, so it is easy to see the presence or absence of opening, and the slit is small. Therefore, there is an advantage that the entire height of the cap can be effectively used.
[0008]
In the cap having the above-described configuration, the connecting portion that connects the body portion of the cap body and the pill fur proof band is formed by slitting the body portion of the cap to separate the cap body and the pill fur proof band from each other. It may be formed by leaving a partial area in the circumferential direction, but instead, a convex ridge protruding inward from the inner peripheral surface is provided at a portion adjacent to the body of the cap body and the pill fur proof band. Preferably, a part is formed and this is used as a connecting part. With this configuration, in order to separate the body of the cap main body and the pill fur proof band, it is only necessary to slit the entire periphery of the boundary between them, and the slitting operation can be facilitated.
[0009]
The ridge portion forming the connecting portion may be arranged at any position in the circumferential direction of the cap, but preferably, in the circumferential direction of the blade formed on the inner peripheral surface of the pill fur proof band. Place in the center. This position is a portion that is displaced inward in the radial direction due to the rigidity of the blade when the blade is tilted upward, so if a ridge is arranged at this position, the trunk of the cap body and the pilfer When slitting the boundary between the proof band and the proof band, the cutter blade is cut to the position in contact with the ridge, so that the boundary between the body of the cap body and the pill fur proof band is removed except for the ridge. Can be reliably separated.
[0010]
In the cap of the present invention, it is preferable that a knurl is formed on the outer peripheral surface of the cap body, and that at least one groove of the knurl extends from the cap body to the pill fur proof band. With this configuration, even if the cap body is opened and then re-closed, the groove of the knurl on the outer peripheral surface of the cap body is shifted to the groove on the outer peripheral surface of the pill fur proof band, and whether or not the cap is opened. Can be more easily recognized.
[0011]
As one of the manufacturing methods of the cap having the above-described configuration, the cap body and the pill fur proof band are integrally connected over the entire circumference and include a plurality of blades on the inner peripheral surface of the pill fur proof band, Forming a cap having a plurality of projections serving as carton stoppers on the outer peripheral surface, and then holding the cap with a slitter jig in a form in which the tip of a slitter jig is inserted into the cap, the slitter jig The boundary between the cap body of the cap and the pill fur proof band is slit by an appropriate cutter blade while the cap is rotated by rotating the cap. Here, it is preferable that the slitter jig is provided with a blade pressing portion that pushes the blade to bend the inside of the cap when inserting the tip of the slitter jig into the cap. With this configuration, when the cap is held by the slitter jig for slitting the cap, the blades can be simultaneously bent inward and folded, thereby facilitating the work of attaching the cap to the cap body.
[0012]
Hereinafter, a cap according to a preferred embodiment of the present invention shown in the drawings will be described. FIG. 1 is a schematic sectional view showing a spout provided with a cap according to an embodiment of the present invention in a state attached to a carton, and FIG. 2 is a schematic sectional view showing the spout in a state where the cap is being opened. 3 is a schematic cross-sectional view of the cap, FIG. 4 is a schematic side view of the cap, FIG. 5 is a schematic bottom view of the cap, and FIG. 6 is a view of the cap in the direction of arrows AA in FIG. 7, FIG. 7 is a schematic sectional view showing a state in which the cap is held by a slitter jig, FIG. 8 is a schematic sectional view showing a step of slitting the body of the cap, and FIG. 9 is the same section as FIG. 10, FIG. 11, FIG. 11, and FIG. 12 are a schematic sectional view, a schematic side view, and a schematic plan view of the spout body of the spout shown in FIG. In FIGS. 1 and 2, a spout generally indicated by reference numeral 11 includes a spout body 12 attached to the carton 5 and a cap 13 attached to the spout body 12.
[0013]
As shown in FIGS. 10 to 12, the spout main body 12 penetrates a flange portion 12a to be attached to the carton and a spout mounting hole 6 (see FIG. 1) formed in the carton 5, and is outside the carton. A cylindrical nozzle portion 12b protruding from the nozzle portion, a shielding portion 12c for closing the nozzle portion 12b, an opening groove 12d provided so that a part of the shielding portion 12c can be easily opened, and the opening groove 12d. A pull ring 12f and the like are connected to the enclosed area via a support 12e. In the spout body 12 shown here, the central part of the shielding part 12c is formed in a downwardly convex shape. With this structure, there is an advantage that the finger can be inserted deeply when the finger is hooked on the pull ring 12f. At the base of the nozzle portion 12b, a boss portion 12ba that fits into the spout mounting hole 6 of the carton 5 is provided, but no carton stop is provided, and the height of the boss portion 12ba is reduced accordingly. ing. Further, on an outer peripheral surface of the nozzle portion 12b, a flange portion 12bb for hooking a blade (details will be described later) provided on the cap 13, a screw thread 12bc for screw-fitting the cap 13 and the like are provided.
[0014]
3 to 6, the cap 13 includes a top plate portion 13a, a cylindrical body portion 13b, and a tapered portion 13c therebetween. A slit 16 is formed around the entire periphery near the lower end of the body portion 13b, and the cap 13 is divided into a cap body 13A above the slit 16 and a pill fur proof band 13B below the slit. The cap main body 13A is provided so as to be screw-fitted to the nozzle portion 12b (see FIG. 1) of the spout main body 12, and has a thread 13d on the inner peripheral surface. The pill fur proof band 13B is attached to the nozzle portion 12b (see FIG. 1) of the spout body 12 so as not to come off, and a plurality of blades 13e for preventing the pill fur proof band from coming off is formed on the inner peripheral surface thereof. ing. The blades 13e are arc-shaped with a constant radius and are substantially horizontal (substantially perpendicular to the center axis of the cap) when the cap is formed. However, as shown in FIGS. In a state where the pill fur proof band 13B is attached to the pill fur proof band 13B, the pill fur proof band 13B can be prevented from coming off by being hooked on the flange portion 12bb of the spout body 12. 3 to 6, a plurality of inwardly protruding ridges 13f are formed at appropriate intervals on the inner peripheral surface of the adjacent portions of the cap body 13A and the pill fur proof band 13B. By leaving the protruding portion 13f without slitting, it serves as a connecting portion for connecting the cap body 13A and the pill fur proof band 13B. As can be clearly understood from FIG. 6, the protruding ridge portion 13f is disposed at the center of each blade 13e in the circumferential direction. The reason will be described later.
[0015]
On the outer peripheral surface of the pill fur proof band 13B, a plurality of (four in the illustrated embodiment) projections 13h serving as carton stoppers are formed. As can be clearly understood from FIG. 1, the lower end position of the cap 13 is brought closer to the carton 5 by forming the carton stopper 13 h on the outer peripheral surface of the cap 13 without forming the carton stopper on the boss portion 12 ba of the spout body 12. can be, note the overall height of the outlet 12, the height of even when was the same as spout 1 prior shown in FIG. 14, the height H ₁ of the cap 13, a conventional cap 3 shown in FIG. 14 It can be much higher than H. Therefore, be provided with a pilfer-proof band 13B at the lower end region of the cap 13, the height H ₂ of the cap body 13A, can be brought close to the height H of the conventional cap 3, similar to the conventional cap 3 Operability can be secured. Further, a knurl composed of a large number of grooves 18 is formed on the outer peripheral surface of the cap body 13A not only on the outer peripheral surface of the body portion 13b but also on the tapered portion 13c. Since the knurl is also formed on the tapered portion 13c as described above, when the cap body 13A is pinched and opened with a finger, the knurl on the outer peripheral surface of the cap is properly caught by the finger, and the cap body 13A can be satisfactorily opened. Forming knurls on the tapered portion 13c in this manner is extremely effective for a cap having a low height. The ridges (portions between the grooves 18, 18) forming the knurl may be symmetrical in cross section such as an isosceles triangle, but are good for fingers when the cap 13 is pinched by a finger and turned in the opening direction. It is preferable to have an asymmetrical shape such as a trapezoidal triangle so as to be hooked on the surface.
[0016]
Most of the multiple grooves 18 forming the knurl are formed only in the cap body 13A, but some grooves 18a are formed so as to extend also to the pill fur proof band 13B.
[0017]
Next, a method for manufacturing the cap 13 having the above configuration will be described. A cap having the shape shown in FIGS. 3 to 5 and having no slit 16 formed in the body, that is, a structure in which the cap body 13A and the pill fur proof band 13B are integrally connected over the entire circumference, and A cap 13 '(see FIG. 7) having a plurality of blades 13e on the inner peripheral surface of the pill fur proof band 13B and a plurality of projections 13h serving as carton stops on the outer peripheral surface is manufactured by molding such as injection molding. Next, as shown in FIG. 7, the cap 13 'is held in a form in which the tip of the slitter jig 21 is inserted into the cap 13' at the tip of the slitter jig 21 attached to the rotation shaft of the slitter. Let it. The tip of the slitter jig 21 has a shape capable of holding the cap 13 ′ concentrically, and when inserted into the cap 13 ′, pushes the blade 13 e to bend the inside of the cap to bend the blade. 21a. Thus, when the cap 13 'is held at the tip of the slitter jig 21, the blade 13e can be simultaneously folded so as to face the inside of the cap. In the figure, reference numeral 16 'denotes a position where the slit 16 is to be formed.
[0018]
After the cap 13 ′ is held by the slitter jig 21, the cap 13 ′ is pressed and fixed to the slitter jig 21 by the holding shaft 22 as shown in FIG. 8, and the slitter jig 21 and the holding shaft 22 are rotated. Then, the cutter blade 23 is pressed against a position 16 'of the body 13 of the cap 13' where the slit 16 is to be formed, and the entire circumference of the body 13 is slit. Thereby, a slit 16 (see FIGS. 3 and 4) is formed in the cap body, and the cap can be separated into the cap body 13A and the pill fur proof band 13B. Here, the width (dimension in the thickness direction of the gap) of the slit 16 formed by the cutter blade 23 may be extremely small, and the thickness of the portion of the cutter blade 23 cut into the cap body is 0.2 to 0.2 mm. It may be about 0.3 mm. With this selection, it is possible to form an extremely thin slit 16 that cannot be recognized as a slit even when the cap body is cut. The cutting depth of the cutter blade 23 is determined so that the entire circumference of the body can be cut, excluding the protruding portion 13f formed on the inner peripheral surface of the cap body. As a result, the cap body 13A and the pill fur proof band 13B are connected only by the ridge 13f. By the way, a plurality of blades 13e are formed on the inner peripheral surface of the pill fur proof band 13B. When the cap 13 'is held at the tip of the slitter jig 21, the blades 13e are bent inside the cap. . When the blade 13e is folded in a bent manner, as shown in an exaggerated manner in FIG. 9, the region forming the blade 13e of the cap body tends to be deformed so as to approach a straight line. Of the circumference, the central portion in the circumferential direction of the blade 13e (the portion forming the ridge portion 13f) is the position closest to the center O of the cap. Therefore, by setting the cutting depth of the cutter blade 23 so that the trunk adjacent to the protruding ridge portion 13f can be cut, the trunk in other regions can be surely cut, and the cap body 13A And the pill fur proof band 13B can be connected only by the ridge portion 13f. Thus, the cap 13 shown in FIGS. 3 to 6 is manufactured.
[0019]
As the material of the cap 13 and the spout main body 12 having the above-described configuration, a material used for a conventional spout may be appropriately used. For example, a low-density polyethylene resin, a medium-density polyethylene resin, a high-density polyethylene resin, a linear Resins such as a low-density polyethylene resin, a polystyrene resin, an ionomer resin, a polypropylene resin, an acrylic resin, a nylon resin, a polyester resin, and a polycarbonate resin.
[0020]
Next, a method of using the spout 11 having the above-described cap 13 will be described. This spout 11 is attached to the carton 5 as shown in FIG. 1 with the cap 13 attached to the spout main body 12, similarly to the conventional spout 1. At this time, the cap 13 is in a state in which the cap body 13A and the pill fur proof band 13B are connected by the ridge 13f, and the blade 13e provided on the inner peripheral surface of the pill fur proof band 13B is a spout. The main body 12 is in a state in which it has entered below the collar portion 12bb. Although there is a slit 16 between the cap body 13A of the cap 13 and the pill fur proof band 13B, it is hardly visible. To open the cap 13, the cap body 13A is pinched and rotated in the opening direction. As a result, as shown in FIG. 2, the cap body 13A comes out above the nozzle part 12b of the spout body 12, but the pill fur proof band 13B has its blades 13e attached to the collar part 12bb of the spout body 12. When the cap body 13A abuts and is prevented from moving upward, it stays at that position and the ridge portion 13f connecting the cap body 13A and the pill fur proof band 13B is broken. Thus, only the cap body 13A can be opened. Even if somebody mischiefly opens the cap 13 body and then recloses the cap body, at that time, traces of breaking the ridge 13f remain, and the cap body 13A and the pill fur proof band 13B And a gap is created between them. Therefore, the presence or absence of opening can be easily confirmed. As shown in FIG. 4, among the grooves 18 of the knurl formed on the outer peripheral surface of the cap, the groove 18a formed over the cap body 13A and the pill fur proof band 13B is shifted in the circumferential direction. It becomes a state, and the presence or absence of opening can be confirmed from this point. Thus, for example, even if someone opens the spout 11 of the carton sold at the store by mischief and attaches the cap 13 again, it is possible to easily recognize that the spout has been opened.
[0021]
In the cap 13 according to the above-described embodiment, a protruding portion 13f is formed on the inner peripheral surface of the body, and the protruding portion 13f is a connecting portion that connects the cap body 13A and the pill fur proof band 13B. However, the present invention is not limited to this configuration, and does not form a protruding portion on the inner surface of the cap body, makes the body portion a constant thickness over the entire circumference, and slits the body portion in the circumferential direction. A plurality of portions may be left without slitting to form a connecting portion.
[0022]
【The invention's effect】
As described above, the spout cap of the present invention is formed by forming a pill fur proof band connected via a connecting portion below the cap body and forming a plurality of projections serving as carton stoppers on the outer peripheral surface thereof. The height required for handling such as opening and closing can be secured on the cap body without making the overall height of the spout too high, and the presence or absence of opening can be determined based on the state of the pill fur proof band, and mischief against the carton And falsification can be prevented.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a spout provided with a cap according to an embodiment of the present invention attached to a carton. FIG. 2 shows the spout shown in FIG. FIG. 3 is a schematic cross-sectional view of a cap used for the spout of FIG. 1. FIG. 4 is a schematic side view of the cap shown in FIG. 3. FIG. 5 is a schematic bottom view of the cap shown in FIG. FIG. 7 is a schematic cross-sectional view of the cap shown in FIG. 3 viewed in the direction of arrows AA. FIG. 7 is a schematic cross-sectional view showing a state where the cap is held by a slitter jig. FIG. 9 is a schematic cross-sectional view showing the same cross-section as FIG. 6 when the cap is slit. FIG. 10 is a schematic cross-sectional view of the spout body of the spout shown in FIG. 1. FIG. 12 is a schematic side view of the spout main body shown in FIG. 10; Plan view [13] Note schematic perspective of the carton with attached outlet diagram Figure 14 is a schematic cross-sectional view of a conventional spout attached to the carton DESCRIPTION OF REFERENCE NUMERALS
1 11 Outlet 2, 12 Outlet body 3, 13 Cap 5 Carton 6 Outlet attachment hole 12a Flange part 12b Nozzle part 12ba Boss part 12bb Collar part 12c Shielding part 12d Opening groove 12f Pull ring 13A Cap body 13B Pilfer proof band 13a Top plate portion 13b Body portion 13c Taper portion 13d Thread 13e Blade 13f Convex portion 13h Carton stop 16 Slit 18 Groove 21 Slitter jig 21a Blade pushing portion 22 Holding shaft 23 Cutter blade

Claims (7)

A cap provided at a spout for a paper container, wherein the cap body is screw-fitted to a nozzle portion of a spout body constituting the spout, and a connecting portion that can be broken at the lower end of the body of the cap body when the cap is opened. The pill fur proof band is integrally connected via a pill fur proof band, and the pill fur proof band is provided with a plurality of blades which are locked to the nozzle portion on the inner peripheral surface to prevent the nozzle from coming off, and a carton stop is provided on the outer peripheral surface. A spout cap having a plurality of protrusions. After the body of the cap body and the pill fur proof band are formed in a form connected over the entire circumference, the boundary between the body of the cap body and the pill fur proof band is slit except for the connection part. The spout cap according to claim 1, wherein the spout cap is separated. The connecting portion is formed by a convex portion protruding inward from an inner peripheral surface of a portion of the cap body and the pill fur proof band adjacent to each other, and the body of the cap body and the pill fur proof band are formed. 3. The spout cap according to claim 2, wherein the band is separated from the band by slitting the entire circumference except for the ridge portion. 4. The spout according to claim 3, wherein the ridge portion forming the connecting portion is disposed at a center in a circumferential direction of a blade formed on an inner peripheral surface of the pill fur proof band. cap. The note according to any one of claims 1 to 4, wherein a knurl is formed on an outer peripheral surface of the cap body, and at least one groove of the knurl extends from the cap body to the pill fur proof band. Exit cap. A structure in which the cap body and the pill fur proof band are integrally connected over the entire circumference, and a plurality of blades are provided on the inner peripheral surface of the pill fur proof band, and a plurality of protrusions serving as carton stoppers are provided on the outer peripheral surface. A cap is formed, and then the cap is held by a slitter jig in a form in which the tip of a slitter jig is inserted into the cap, and the cap is rotated by rotating the slitter jig. Wherein the boundary between the cap body and the pill fur proof band is slit by a cutter blade. 7. The note according to claim 6, wherein the slitter jig includes a blade pressing portion that presses the blade and folds the blade inward when inserting the tip of the slitter jig into the cap. Manufacturing method of outlet cap.

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