JP3136109B2 - Synthetic resin cap and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a synthetic resin pill fur proof cap and a method for producing the same.

[0002]

2. Description of the Related Art At the time of filling a fruit juice beverage or the like, a content liquid overflows from a bottle mouth, and a liquid containing sugar adheres to an outer peripheral surface of the bottle mouth.
To prevent this, such as increasing the opening torque of the cap, capping after filling to prevent this, then wash water or hot water from the top of the cap by showering,
A cap has been proposed which is guided to the outer peripheral surface of the bottle through a cleaning hole of the cap to wash off a liquid containing sugar attached to the bottle.

For example, Japanese Utility Model Application Laid-Open No. Sho 60-177040 discloses a metal cap for cleaning a bottle bottle, and Japanese Utility Model Application Publication No. 4-54119 discloses a synthetic resin side wall and a metal cap. And a pill fur proof cap made of a plastic molded product are proposed in JP-A-7-41023.

[0004]

In the first prior art, since the cap is made of a metal, there is a drawback that the broken portion is liable to be injured when the cap is opened.

[0005] In the second conventional example, T
A cleaning hole is provided on the top edge of the top and / or the peripheral wall of the synthetic resin pill fur proof cap having an E (tamper evidence) band, and connected to the inside of the pill fur proof band and to the lower end of the band. The cleaning liquid is discharged from a discontinuous portion of the fin provided obliquely upward from the base. However, such a fin has a drawback such that the base of the fin is easily deformed and easily slips off when the plug is opened, and if the base of the fin is made thick to prevent this slippage. There is a disadvantage that the passage resistance to the bottle is increased during capping, and the bridge connecting the cap body and the TE band is easily broken. In such a case, it is conceivable that the fins are formed continuously. However, when the fins are formed in a continuous shape, there is a problem in drainage of the cleaning liquid.

In the third conventional example, a smooth capping property and a sufficient retaining force can be obtained by a continuous bellows-like locking portion. However, when the capping is followed by showering for bottle cleaning purposes, the lower portion of the cap main body is removed. The cleaning water that has entered from the breakable region may accumulate in the bellows locking portion and become contaminated, resulting in unsanitary food hygiene.

When a cleaning hole c is formed by post-processing with a cutter b or the like above a cap a (see FIG. 15) made of a general synthetic resin, burrs d are likely to be generated. When used in combination with e, the inner plug e may be lifted by the burr d before the bridge is broken by a slight mischievous opening operation after the hot pack. At times, there is a concern that a problem may occur that the airtightness cannot be confirmed from the outside even though the airtightness is impaired.

[0008]

The present invention has been made in view of such circumstances,
The passage resistance during capping is minimized, the locking resistance during opening is maximized as much as possible, and the bridge is surely broken at the time of opening. It is an object of the present invention to provide a synthetic resin cap capable of being washed away and a method of manufacturing the same.

[0010]

[0011]

[0012]

[0013]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems.
Means for solving the problem are configured as follows. sand
In other words, in the invention according to claim 1 , a female screw groove is formed on the inner surface of the skirt wall hanging down from the outer peripheral portion of the top plate, the female screw groove being screwed with a male screw groove formed on the outer periphery of the bottle. A TE band is connected to a lower part of the skirt wall via a breakable bridge, and a continuous bellows-shaped locking member is formed inside the TE band with an upper constriction for locking to a bead of a bottle. A cap used in combination with a cap body for sealing a bottle mouth, wherein a thin portion is formed on an upper portion of the skirt wall, and a plurality of cleaning portions are formed on the thin portion at predetermined circumferential intervals. It is characterized by forming holes.

[0014] In the invention of claim 2 is characterized in that the cleaning hole of claim 1 is slit.

[0015] According to the third aspect of the present invention, there is provided the first or second aspect.
3. The continuous bellows-shaped locking member according to claim 2,
At the connection bending part with the E band, at intervals in the circumferential direction,
It is characterized by having multiple small holes or slits.
You. According to the fourth aspect of the present invention, a female screw groove is formed on the inner surface of the skirt wall hanging from the outer peripheral portion of the top plate, the female screw groove being screwed with the male screw groove formed on the outer periphery of the bottle opening. A TE band is connected to the lower part via a breakable bridge, and a cap body having a continuous bellows-shaped locking member formed by being narrowed upward inside the TE band is formed. In the method for manufacturing a synthetic resin cap for forming a cleaning hole, in the above-mentioned molding, a thin portion is formed in advance on an upper portion of a skirt wall for forming a cleaning hole, and then a predetermined portion is circumferentially formed on the thin portion. A plurality of cleaning holes are formed at intervals of. The molding of the cap body may be any of ordinary injection molding or compression molding.

According to a fifth aspect of the present invention, the cleaning hole according to the fourth aspect is formed by cutting means.

According to a sixth aspect of the present invention, the cleaning hole according to the fourth aspect is formed by laser processing means.

According to a seventh aspect of the present invention, the cleaning hole according to the fourth aspect is formed by electric discharge machining means.

According to an eighth aspect of the present invention, the cleaning hole according to any one of the fourth to seventh aspects is a slit.

The thin portion may be formed by forming a vertical width required for forming the cleaning hole in the circumferential direction, or by forming the same thin portion from the cleaning hole forming position to the upper portion. Is also good. The thickness of the thin part is 0.1-0.5
When the thickness is about mm, more preferably about 0.3 mm, generation of burrs can be effectively suppressed.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a synthetic resin cap and a method for manufacturing the same according to the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 6 show a synthetic resin cap (pill fur proof cap) C formed by the injection molding method of the present invention. In these figures, reference numeral 1 denotes a cap body, 2 denotes a top plate, and 3 denotes a top plate. The top plate 2
The skirt wall 31 hangs down from the outer periphery of the skirt wall, 31 is a knurl groove formed on the outer periphery of the skirt wall, 4 is a female screw groove carved on the inner circumference of the skirt wall 3, and 41 intersects the female screw groove 4. 5 is a breakable bridge formed in the lower inner surface of the skirt wall 3, and 6 is a TE connected to the lower portion of the skirt wall 3 via the bridge 5.
This is a band (tamper evidence band), and a plurality of the above-described bridges 5 are provided at predetermined intervals, and a gap is formed therebetween.

Reference numeral 7 denotes a continuous bellows-shaped locking member formed on the inner surface of the TE band 6, which is bent obliquely upward and inward from the lower end of the TE band 6, and is formed in a bellows shape having a continuous constriction. You. Reference numeral 8 denotes a slit-shaped washing hole (or vent hole) formed in the upper part of the skirt wall 3 at an appropriate interval in the circumferential direction, and 9 denotes a continuous bellows-like locking member 7 at the lower end of the TE band 6. Is a small hole formed in the bent portion for discharging the cleaning liquid.

On the other hand, 11 is an inner plug closely fitted to the bottle 10, and a top plate 111 whose outer peripheral edge is in contact with the upper end of the bottle 10,
It consists of a middle foot 112 which hangs downward from the peripheral edge of the top plate 111 and is in close contact with the inner peripheral surface of the bottle opening 10. Reference numeral 12 denotes a male screw formed on the outer periphery of the bottle 10 for screwing the female screw groove 4 of the cap body 1, 121 denotes a vertical groove formed so as to cross the male screw 12, and 13 denotes a TE band 6. This is a bead for locking the continuous bellows-shaped locking member 7 formed on the inner surface.

In the cap C formed as described above,
Since the continuous bellows-shaped locking member 7 has flexibility, the bridge 5 can easily pass over the bead 13 of the bottle opening 10 at the time of closure, and can be restored and locked at the lower portion of the bead 13 after closure.
Is prevented, the mounting property is good, and when the plug is opened, the continuous bellows-shaped locking member 7 having the upper constricted shape is securely locked to the bead 13 and the bridge 5 is always broken. The bridge 5 can be
The danger that the airtightness is lost before the burnout expires is completely prevented. The small holes 9 formed in the continuous bent portion 61 of the TE band 6 are preferably provided at predetermined intervals in the circumferential direction so as to secure sufficient retaining strength of the TE band 6. In the example, four are formed.

On the other hand, during the filling process, the content liquid 15
The inner plug 11 may be closed in a state in which is adhered (see FIG. 5). Even in such a case, when the cleaning liquid is sprayed on the cap during the cleaning process, as shown in FIG. ,... And the gap between the bridges 5,.
5 is washed away by the washing liquid, flows down from the vertical groove 41, and is discharged to the outside through the small hole 9 in the lower part. Therefore, in any cap, the inside of the cap is uniformly cleaned, the generation of mold is prevented, and the appearance is also clean.

Needless to say, the above-mentioned cleaning holes 8,... And discharge small holes 9,. Also, when the upper cleaning holes 8,... Are not provided, a sufficient cleaning effect can be obtained by introducing the cleaning liquid into the gaps between the bridges 5,. The cleaning effect can be further improved by providing.

FIGS. 7 and 8 show cross sections of different embodiments of the synthetic resin cap. In these figures, reference numeral 14 denotes a thin portion formed on the upper portion of the skirt wall 3, and the thin portion 14 is a cap body. It can be formed in advance in one molding step, and the thickness is preferably about 0.1 to 0.5 mm, more preferably about 0.3 mm. With such a thickness, even if the post-processing of the cleaning hole 8 is performed by the cutter 42 after the molding of the cap main body, a large burr as shown by d in FIG. 15 does not occur. The cleaning holes 8 can be easily formed by means or electric discharge machining means.

On the other hand, the continuous bellows-shaped locking member 7, which is constricted at the lower part of the skirt wall 3 via the bridge 5, can easily pass over the bead 13 with a low passage resistance when the plug is closed, and the bottle 10 It can be stably hooked from below on the entire circumference of the bead 13, and can be reliably hooked on the bead 13 when the plug is opened, so that the bridges 5,.

At the time of opening, since no large burrs are formed in the cleaning hole 8, the inner plug 11 is not inadvertently lifted, and the hermeticity is lost due to mischief such as short turning. There is no such a problem, and the airtightness of the inner plug 11 is maintained even when the bridges 5 are broken.

After the content liquid is filled, even if the content liquid overflows in the cap C, the cleaning liquid is introduced into the inside through the cleaning holes 8,... And the slits 51 between the bridges 5, 5. The inside is washed and discharged from the discharge holes 9 to prevent the generation of mold.

FIGS. 9 to 14 show an apparatus for carrying out the method of forming the synthetic resin cap C of the present invention. In these figures, reference numeral 22 denotes a cap which supports the inside of the cap body 1 and moves on a predetermined circular orbit. A small gear 23 fixed at one end of the spindle 22 meshes with a large-diameter fixed gear 24, and a head 25 formed at the other end of the spindle 22 has Three balls 2 abutting on the inner surface of the top plate 2 of the cap body 1
Are fitted in the guide holes 27 to form springs 28,.
As shown in FIG. 9, a sleeve 29 is rotatably supported on the outer periphery of the tip of the head 25.

A rod 30 for projecting a cap is freely inserted into the shaft center of the spindle 22 (see FIG. 10), and a cam follower 31 provided at the base of the rod 30 has a cylindrical shape. The cap C is slidably guided by a cam groove 33 (see FIG. 13) provided on the outer periphery of the support 32, and the cap C is projected outward by the rod 30 at the cap projection position 444. Note that its projecting position 444, is provided with discharge blow nozzle 445 (see FIG. 1 3), in synchronization with the projecting operation of the rod 30 blown air and, in so as to ensure that protrude cap C I have.

The six spindles 22,... Are rotatably supported at equal intervals by a hub 34 (see FIG. 10), and a pulley (or a pulley) fixed to one end of a support shaft 35 of the hub 34 is provided. Although not shown, a driving force source is operatively connected to the sprocket (not shown) through a wrapping transmission mechanism using a belt or a chain. Are revolving around the fixed gear 24 while rotating. Reference numeral 37 denotes a bearing that rotatably supports the spindle 22 on the hub 34, and reference numeral 38 denotes a bearing that rotatably supports the support shaft 35 of the hub 34, and is supported by the support 32.

The cap C is supported from the inside by the head portion 25 of the spindle 22, and the skirt wall 3 is pressed against the knurl groove 41a of the guide member 41 to engage with the knurl groove 31 previously formed in the cap C. The cutters 42, 4 provided integrally with the guide member 41 while forcibly rotating the cap C
3 form cleaning holes 8,... In the upper part of the skirt wall 3 (see FIG. 12), and a breakable bridge formed in the lower part thereof. Slits 5 1 between 5 can be formed ... simultaneously. Note that the above-described cleaning hole 8 may have a slit shape.

As described above, the cap C is
When the head 2 is forcibly rotated by being sandwiched between the head 25 and the knurled groove 41a, the sleeve 29 is freely rotatably provided on the outer periphery of the tip of the head 25.
Can absorb the peripheral speed difference from the large diameter portion, eliminate the slip between the cap C and the head portion 25, and stably hold the cap C by the pressing force of the spindle 22 against the knurled groove 41a. The cutting operation can be performed with high accuracy by both cutters 42 and 43.

The transport route 440 of the cap C is shown in FIG.
3, see FIG. 14), the cross-section of which is substantially U-shaped, and from a carry-in path 441 formed diagonally downward, to a discharge path 443 diagonally downward through a swirling circuit 442 formed around the fixed gear 24. It is formed so as to be continuous, and its loading path 441
Is formed at an inclination angle such that the cap C is fitted obliquely from above to the head portion 25 of the spindle 22 (see FIG. 10).
It is formed so that the cap C protruded at 44 can be discharged obliquely downward as it is. Since the transport route 440 is formed in such an annular shape, the entire apparatus can be made compact.

The above-described guide member 41 and cutters 42, 4
3 (see FIG. 11) is formed in a fan shape,
45 and heaters 46, 47 together with both brackets 48,
It is clamped and integrated by fastening a bolt 50 between 49 and is fixed at a predetermined position inside the rotary circuit 442. The cutter 42 for forming the cleaning hole 8 (see FIGS. 7 and 12) has eight blades 421,..., And the cutter 43 for forming the slit 51 has one blade 431. Since both the cutters 42 and 43 are heated by the heaters 46 and 47, good cutting properties can be obtained and the generation of burrs can be suppressed in combination with the formation of the thin portion 14.
In order to form the above slits 51,..., The cap C is preliminarily formed so that a portion serving as the bridge 5 projects inward, and the portion is cut from the outside with a single-blade cutter 43. Are formed between the bridges 5 and 5 by cutting in
The slit can be formed by the method disclosed in Japanese Patent No. 345106.

The process of forming the cap C will be described. First, the cap C loaded from the loading path 441 is fitted and supported by the head 25 of the spindle 22 when it is introduced into the swirling circuit 442. When the knurl groove 41a of the guide member 41 reaches the knurl groove 41a, the knurl groove 31 of the cap C engages with the knurl groove 41a and revolves while forcibly rotating. During this time, the cleaning holes 8,... And the slits 51,... Are simultaneously formed by the two cutters 42, 43, and the cap C is protruded toward the discharge path 443 by the rod 30 at the cap protruding position 444. The small holes (or slits) 9 for draining water are formed in advance in the molding stage.

During the cutting operation by the cutters 42 and 43, the cap C is sandwiched between the head portion 25 of the spindle 22 and the knurled groove 41a, and the inner periphery of the cap C is held by the sleeve 29. Since the peripheral speed difference on the surface is absorbed, the support of the cap C is stable, and two cuttings can be performed efficiently.

[0046]

[0047]

[0048]

As described in the foregoing, according to the invention described in claims 1 to 8, via the bridge breakable bottom of the skirt wall hanging down from an outer circumferential surface of the top plate TE
A cap body in which a band is connected, and a constricted continuous bellows-like locking member for locking to a bottle bead is formed inside the TE band, is combined with a bottle stopper inner plug. A thin portion is formed on the upper part of the skirt wall of the cap to be used, and a plurality of washing holes are formed in the thin portion at intervals in the circumferential direction. The bead can be easily passed over and the plugging operation can be easily performed. When the plug is opened, the locking member is securely locked to the bead and the bridge is always broken, and the inside of the cap can be cleaned thoroughly after capping. Also,
Since the cleaning hole is formed in the thin part formed in the upper part of the skirt wall, it is possible to eliminate the occurrence of large burrs, and to inadvertently lift the inner plug due to mischief such as turning a little, and leak airtight. Can be avoided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a closed state of an embodiment of a synthetic resin cap of the present invention.

FIG. 2 is a longitudinal sectional view of the cap.

FIG. 3 is a bottom view of the cap.

FIG. 4 is an enlarged sectional view of a lower portion of the cap.

FIG. 5 is an assembled perspective view of the cap.

FIG. 6 is a cross-sectional view showing a flow of a cleaning liquid during the cleaning.

FIG. 7 is a partial cross-sectional view showing a different embodiment of the same cap in a closed state.

FIG. 8 is an enlarged sectional view of a main part of the cap.

FIG. 9 is a cross-sectional plan view of a main part of a cutting step in the method for manufacturing the cap.

FIG. 10 is an explanatory diagram showing a correspondence relationship between a cap and a spindle in each step of loading and unloading the cap.

FIG. 11 is an exploded perspective view of the guide member, the cutter, and the like.

FIG. 12 is an explanatory diagram of a step of forming the cleaning hole.

FIG. 13 is an explanatory perspective view showing a main layout of the device.

FIG. 14 is a perspective view showing a transport route of the apparatus.

FIG. 15 is a cross-sectional view of a cap showing an example of a case in which burrs are generated by a conventional cleaning hole processing.

[Explanation of symbols]

C ... Cap, 1 ... Cap body, 2 ... Top plate, 3 ... Skirt wall, 4 ... Female screw groove, 5 ... Bridge, 6 ... TE band, 61 ... Continuous bent part, 7 ... Continuous bellows-shaped locking member, 8 ...
Cleaning hole or slit, 9 ... Small hole or slit, 1
0: bottle mouth, 11: inner stopper, 12: male screw groove, 13: bead, 14: thin part.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-74644 (JP, U) JP-A 63-117754 (JP, U) JP 4-54119 (JP, Y2) (58) Survey Field (Int.Cl. ⁷ , DB name) B65D 41/34-41/40 B65D 51/24

Claims (8)

(57) [Claims] 1. A female screw groove is formed on an inner surface of a skirt wall hanging from an outer peripheral portion of a top plate to be screwed with a male screw groove formed on an outer periphery of a bottle opening. A TE band is connected via a flexible bridge, and a cap body having a continuous bellows-like locking member formed on the inside of the TE band so as to lock to a bead of the bottle is used for sealing a bottle bottle. A cap used in combination with an inner plug, wherein a thin portion is formed on the upper portion of the skirt wall, and a plurality of cleaning holes are formed in the thin portion at predetermined intervals in a circumferential direction. A synthetic resin cap characterized by the following. 2. The synthetic resin cap according to claim 1 , wherein said cleaning hole is a slit. 3. The continuous bellows-shaped locking member and the TE bar
At the connection bend with the
Wherein a small hole or slit is provided.
The synthetic resin cap according to claim 1 or 2. 4. A female screw groove which is screwed with a male screw groove formed on the outer periphery of the bottle bottle is formed on an inner surface of a skirt wall hanging down from an outer peripheral portion of the top plate, and is breakable at a lower portion of the skirt wall. A TE-band is connected via a simple bridge, and a cap body is formed inside the TE-band, in which a continuous bellows-like locking member is formed by constriction, and then a washing hole is formed in an upper part of the skirt wall. In the method for manufacturing a synthetic resin cap to be formed, in the above-mentioned molding, a thin portion is formed on an upper portion of a skirt wall in which a cleaning hole is formed, and then a predetermined interval is circumferentially formed on the thin portion. And forming a plurality of cleaning holes. 5. The process for producing a synthetic resin cap according to claim 4, characterized in that formed in the cutting unit the cleaning hole. 6. The method for producing a synthetic resin cap according to claim 4, characterized in that formed by laser processing means the cleaning hole. 7. A method for producing a synthetic resin cap according to claim 4, characterized in that is formed by electrical discharge machining means the cleaning hole. 8. The process for producing a synthetic resin cap according to any one of claims 4 to 7 wherein the cleaning hole is characterized in that it is a slit.