JPH02180195A - Apparatus for mounting and cutting cap made of synthetic resin - Google Patents

Abstract

PURPOSE:To eliminate necessity of formation of a breakage line by performing separate additional process at the time of forming a cap or after molding it by a method wherein in process for mounting a cap on a vessel mouth, a border between a main part and a pilfer-proof skirt part on a skirt wall of the cap is partially cut along the periphery to form a breakage line extending along the periphery. CONSTITUTION:If a sub supporting body 218 relatively rises with respect to a main supporting body 202 at the time of mounting operation wherein a cap 2 is mounted on a mouth 206 as required, a cutter 258 is elastically pushed against a border 12 on a skirt wall 6 of the cap by elastic displacement of a third spring means 282. The cutter 258 itself swings around the cap 2 while being pushed against the border 12 on the skirt wall 6 of the cap 2 along with rotation of the main supporting body 202, thereby forming a breakage line.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to attaching a synthetic resin container lid having pilfer-proof properties to the mouth and neck of the container in a desired manner, and adjusting the skirt wall of the container lid at a desired position in the circumferential direction. The present invention relates to a mounting and cutting device for partially cutting to produce a circumferentially extending fracture line.

(Prior art) As a container lid for containers such as beverage bottles,
Publication No. 74445 and Japanese Patent Application No. 57-116270 and the drawings disclose synthetic resin container lids having pilfer-proof properties. Such a container lid has a top wall and a cylindrical skirt wall depending from the periphery of the top wall. The skirt wall is generally formed with a fracture line composed of a plurality of circumferentially extending slits spaced apart from each other and a plurality of bridges located between the slits. It is divided into a main portion above the break line and a pilfer-proof hem below the break line. A female thread is formed on the inner circumferential surface of the main portion, and a plurality of locking flap pieces protruding radially inward are formed at intervals in the circumferential direction on the inner circumferential surface of the pilfer pull hem. ing.

As can be easily understood from the description in JP-A-56-74445 mentioned above, such container lids have various advantages over other types of synthetic resin container HMs having pilfer-proof properties. . However, there are the following problems to be solved in connection with the molding.

[Problems with conventional technology]

In a synthetic resin container lid with pilfer-proof properties, the break line formed on the skirt wall can also be created when the container lid is injection molded or stamped; When the mold and container lid are separated after molding, a considerable force is applied to the above-mentioned break line (the bridging part), and this causes the above-mentioned break line (the bridging part) to break. There is a lot of fear.

In order to avoid such problems, after the injection molding or stamping process, the boundary area between the main part and the pilfer-proof hem of the skirt wall of the molded container lid is partially cut in the circumferential direction. It is conceivable to carry out an additional step to create a circumferentially extending fracture line, but this would necessarily result in a reduction in the container lid forming speed and/or an increase in container lid forming costs.

[Technical problem of the invention]

The present invention has been made in view of the above facts, and its main technical problem is to provide a mounting process for attaching the 2S lid to the neck of the container as required without performing an additional fracture line generation process. At this time, a break line generation step is also performed in which a boundary area between the main portion and the pilfer-proof hem in the skirt wall of the container lid is partially cut in the circumferential direction to generate a required break line extending in the circumferential direction. It is an object of the present invention to provide a novel mounting and cutting device that enables the following.

[Means for Solving the Invention] As a result of intensive research and experiments, the present inventors discovered that during the installation process of attaching the container lid to the neck of the container as required, the main part of the skirt wall of the container lid and the pilfer proof It has been found that the above technical problem can be achieved by partially cutting the boundary region with the hem in the circumferential direction to generate a required breaking line extending in the circumferential direction.

That is, according to the present invention, there is provided a synthetic resin container lid that is fitted onto a container neck and has a male thread formed on the outer peripheral surface and a locking flange located below the female thread, comprising a top wall and a cylindrical skirt wall hanging from the periphery of the top wall,
A female thread is formed on the inner circumferential surface of the main part of the skirt wall to cooperate with the female thread of the mouth and neck part, and a radially inner circumferential surface of the pilfer-proof hem located at the lower end of the skirt wall is formed. A container lid having a configuration in which a plurality of locking flap pieces protruding in the direction are formed at intervals in the circumferential direction is pressed downward in the axial direction and rotated in a predetermined mounting rotation direction while being pressed against the mouth and neck. Thus, the female thread of the container lid is screwed into the male thread of the neck, and the locking flap piece of the container lid is placed below the locking flange of the neck to lock the container. The upper end edge of the flap piece is locked to the lower surface of the locking flange, and the boundary area between the main part and the pilfer-proof hem in the skirt wall of the container lid is partially cut in the circumferential direction. A mounting and cutting device for generating a circumferentially extending fracture line; a main support mounted to be vertically movable up and down and rotatable about a vertically extending central axis; an elevating means for moving the body up and down; a rotating means for rotating the main support in the mounting rotation direction about the central axis; and a rotating means for rotating the main support about the central axis together with the main support. , and a sub-support mounted on the main support so as to be movable vertically over a predetermined range with respect to the main support, and interposed between the main support and the sub-support. a first spring means for elastically biasing the sub-support vertically downward; and a container lid engaging member fixed to the sub-support and pressed against the container lid when the main support is lowered. a cutter support mounted on the sub-support so as to be swingable over a predetermined range; a disc-shaped cutter rotatably mounted on the cutter support; the sub-support and the cutter support. second spring means interposed between the body and the main support for resiliently biasing the cutter support to an inactive position in which the cutter is spaced radially outwardly from the container lid; Due to the fact that the container lid is pressed against the container lid, the secondary support is moved relative to the main support against the biased elastic action of the first spring means. When the target is raised, the cutter support is swung against the biased elastic action of the second spring means, so that the cutter can move between the main portion of the skirt wall of the container lid and the pilfer. A mounting and cutting device is provided, characterized in that it comprises: cutter actuating means for bringing the cutter into a working position acting on the border area with the proof hem;

[Invention, action of light]

In the mounting and cutting device of the present invention, when the container lid engaging tool acts on the container lid to properly mount it on the mouth and neck of the container, the disc-shaped cutter is brought into the operating position by the cutter actuating means. and acts on a desired portion of the skirt wall of the container lid (boundary area between the main portion and the pilfer-proof hem) to generate a desired breaking line. Therefore, when applying the mounting and cutting device of the present invention, there is no need to form a break line at a desired location on the skirt wall of the container lid before fitting the container lid onto the neck of the container, and therefore, The above-mentioned problems in the prior art regarding the formation of break lines are solved.

[Preferred specific example]

1 and 2 show an example of a synthetic resin container lid to which the mounting and cutting device of the present invention can be used.

The illustrated container lid, designated as a whole by the number 2, includes a circular top wall 4 and a substantially cylindrical skirt wall 6 depending from the periphery of the top wall 4. The skirt wall 6 includes a main part 8, a pilfer-proof hem part 10 located at the lower end, and a main part 8.
and the pilfer-proof hem lO. The outer diameter of the boundary region 12 is made smaller than the outer diameter of the main portion 8, and the outer diameter of the boundary region 12 is made smaller than that of the main portion 8.
The wall thickness of the main portion 8 is smaller than that of the main portion 8.

In the pilfer-proof hem 10, the inner diameter is the main part 8.
and is made larger than the inner diameter of the boundary region 12. Further, the outer diameter gradually increases downward, and the outer diameter of the pilfer-proof hem lO is arcuate in the axial cross-sectional view. A female thread 14 is formed on the inner circumferential surface of the soil portion 8 . Further, the outer circumferential surface of the main portion 8 is formed with a concave-convex shape or a roller-groove shape 16 to prevent fingers from slipping when rotating the container lid 2 by placing a finger thereon. A plurality of locking flap pieces 18 are provided on the inner peripheral surface of the pilfer-proof hem 10 at intervals in the circumferential direction.
is formed. As clearly shown in FIG. 2, the base edge 20 of each of the locking flap pieces 1B connected to the inner circumferential surface of the pilfer-proof hem allows the container M2 to be attached to the neck of the container as described below. An acute angle α is made with respect to the axial direction in the opposite direction (counterclockwise as seen from above in Fig. 1) to the mounting rotation direction of container M2 (clockwise when seen from above in Fig. 1) when mounting the container M2. It extends at an angle. Each of the locking flanzo pieces 18 projects radially inward from the base edge 20 at an angle opposite to the mounting rotation direction. The locking flap piece 18 itself has a substantially triangular shape, and its upper edge 22 extends downwardly at a slight angle β and extends radially inward, and its lower edge 24 extends upwardly by a considerable angle β. and extends radially inwardly at an angle γ of, for example, 60 degrees. Above angle β
In this case, the locking flap piece 18 is elastically bent along its base edge 20 in a direction opposite to the mounting rotation direction, so that one side of the locking flap piece I8 is attached to the inner periphery of the pilfer-proof hem 10. Conveniently, the upper edge 22 is arranged to be substantially horizontal when in contact with a surface.

Next, the container M2 as shown in FIGS. 1 and 2, which is fitted onto the neck and neck of the container, is rotated in the attachment rotation direction while being pressed against the neck and neck of the container. One of the mounting and cutting devices constructed according to the invention, which is advantageously utilized to simultaneously produce a circumferentially extending break line in the boundary area 12 in the skirt wall 6 of the container lid 2. For specific examples, see Part 3-
This will be explained with reference to Figure A and Figure 3-B.

Referring primarily to FIG. 3-A, the illustrated mounting and cutting apparatus, generally designated by the numeral 200, includes a main support 20.
It is equipped with 2. A plurality of such main supports 202 are arranged at intervals in the circumferential direction on the periphery of a rotation support body (not shown) that is rotationally driven in a predetermined direction about a central axis that extends substantially vertically. ing. In other words,
The rotatable support body (not shown) has a plurality of mounting and cutting devices, generally designated 200, disposed at circumferential intervals around its periphery. Each of the mounting and cutting devices 200 is conveyed through a predetermined circular path along with the rotation of the rotary support body (not shown), while the rotary support body (not shown) is similarly conveyed below the rotary support body (not shown). The container 204 (not shown) is transported along with the rotation of the container 204 (not shown).
Mouth and neck region 206 (only a portion of which is shown in Figure 3-B)
It acts on the container lid 2 which is fitted on the container lid 2.

The main support body 202 of the mounting and cutting device 200 extends substantially vertically and is movable up and down through an appropriate mounting mechanism (not shown) to the rotary support body (not shown). It is rotatably mounted around the central axis 208 of the.

The main support body 202 is provided with a predetermined circular path between the rotation support body (not shown) and the main support body 202 as the rotation support body (not shown) rotates. When conveyed through the main support 202
An elevating means (not shown) for moving the main support 202 along its central axis 2 as required.
A rotating means (not shown) is provided for rotating the container 204 in a clockwise direction when viewed from above in FIG. There is.

The main support body 202 has an annular flange portion 21 at its lower end.
has 0. In this annular flange portion 210,
A plurality of through holes 212 (third-A
Only one through hole 212 is shown in the figures and FIG. 3-B). Each of the through holes 212 includes
A suspension loft 214 is inserted so as to be movable up and down. A head portion 216 having a diameter larger than the inner diameter of the through hole 212 is formed at the upper end of the suspension rod 214, so that the suspension rod 214 is attached to the annular flange portion 21 of the main support body 202.
0, the lowermost position where the head 216 abuts the upper surface of the annular flange portion 210 (the position shown in FIG. 3-A)
The suspension rod 21 cannot be moved lower than
A sub-support body 218 is fixed to the lower end of 4. This sub-support body 218 is composed of an integral piece having an upper cylindrical portion 220 with a relatively small diameter, a lower cylindrical portion 222 with a relatively large diameter, and an annular flange portion 224 formed on the lower cylindrical portion 222. The central axis thereof is aligned with the central axis fi208 of the main support body 202.

A small diameter portion 226 is present at the lower end of the suspension rod 214, and a through hole 228 is provided in the annular flange portion 224 of the universal support 218, and has an inner diameter corresponding to the outer diameter of the small diameter portion 226 of the suspension rod 214. A plurality of through holes 228 are formed at intervals in the circumferential direction (each of the through holes 228 corresponds to each of the plurality of through holes 212 formed in the annular flange portion 210 of the main support body 202, so suspension rondo 2
14)
. Then, the small diameter portion 226 of the suspension rod 214 is inserted into the through hole 228, and then the small diameter portion 226 of the suspension rod 214 is inserted into the through hole 228.
A locking nut 230 is attached to the male thread formed at the lower end of 26.
By screwing them together, the sub-support 218 is fixed to the lower end of the suspension rod 214 as required. The suspension rod 214 further has a male thread formed in a portion located above the small diameter portion 226, and a napht 232 is screwed into the flag thread. A first spring means 234 constituted by a compression coil spring located outside the connecting rod 214 is interposed between the upper surface of the nut 232 and the lower surface of the annular flange portion 210 of the main support body 202. It is being The first spring means 234 elastically biases the suspension rod 214 and the sub-support 218 vertically downward with respect to the main support 202, so that the suspension rod 214 and the sub-support 218 are at the lowest position shown in FIG. The head 216 of the rond 214 is elastically held in a position where it abuts the upper surface of the annular flange portion 210 of the main support 202 . Accordingly, the sub-support body 218 is supported vertically relative to the main support body 202 so as to be movable up and down, and is moved to the lowest position shown in FIG. 3-A by the first spring means 234. It will be clear that it is held elastically. Sub-support body 218
A container lid engaging tool 236 is provided on the lower surface of the lower cylindrical portion 222.
is fixed.

A hole 238 with a female thread is formed in the lower surface of the lower cylindrical part 222 of the sub-support body 218, while a small diameter protrusion 240 with a male thread is formed in the upper end of the container lid engagement tool 236. By screwing the small-diameter protrusion 240 into the hole 238, the container lid engaging tool 23 is attached to the lower cylindrical portion 222.
6 is fixed. On the bottom surface of the container lid retainer 236,
A recess 242 is formed having an inner diameter corresponding to the outer diameter of the container lid 2 (Fig. 3-B). And this fourth part 242
A locking member 244 made of a flexible material such as natural or synthetic rubber is attached to the inner circumferential surface of the locking member 244 .

The above-described configuration of the mounting and cutting device 200 is already known as a mounting device for mounting the container M2 on the mouth and neck portion 206 of the container 204, and therefore a detailed explanation of the above-described configuration will be omitted. do.

Illustrated apparatus and cutting device 20 constructed in accordance with the present invention
0, in order to make it possible to attach the container M2 to the neck 206 of the container 204 and at the same time to generate a circumferentially extending fracture line in the boundary area 12 in the skirt wall 6 of the container HM2, the following A street configuration has been added.

That is, a notch is formed in the annular flange portion 224 of the sub-support body 218 at a specific angular position, and the support shaft 246 extends substantially horizontally across the notch.
is fixed. A cutter support 24 is swingably mounted on this support shaft 246. The cuffer support body 248 in the illustrated example is composed of a first support piece 250 and a second support piece 252 that are separately and independently swingably attached to the support shaft 246. A cutter support portion 254 is formed at the lower end of the first support piece 250.
4 has a through hole 256 formed therein. A shaft 260 having a disk-shaped cutter 258 fixed to its lower end is rotatably mounted in the through hole 256. In the illustrated cuckoo 258, as shown in FIG. 4, there are a plurality of interruptions 264 located at intervals in the circumferential direction on the cutting blade 262 formed on the outer periphery.

On the other hand, the upper end of the second support piece 252 has the support shaft 2
A cam driven roller 268 is rotatably mounted by a shaft 2 (86) extending substantially parallel to 46.
In association with the cam driven roller 268, a substantially cylindrical cam 270 is fixed to the lower surface of the main support body 202. The cam 270 has an annular flange portion 27 at its upper end.
2, and set screws 274 are inserted through the annular flange portion 272 at a plurality of positions spaced apart in the circumferential direction.
By screwing the cam 2 to the main support 202, the cam 2
70 is fixed to the lower surface of the main support 202. A key groove 271 extending from the upper end to the lower end is formed on the inner circumferential surface of the cam 270, while a corresponding key a273 is formed on the outer circumferential surface of the upper cylindrical portion 220 of the sub-support body 218. A key 275 is fixed in a keyway 273 having a relatively short length in the vertical direction. A radially outer portion of this key 275 is located within the key groove 271 . Such a key 275 allows the sub-support body 218 to move up and down with respect to the cam 270, but reliably prevents the sub-support body 218 from rotating with respect to the cam 270. A cam action surface 276 whose outer diameter gradually increases upward is formed on the outer peripheral surface of the cam 270, the center axis of which is aligned with the center axis 208 of the main support 202. As will become clear from the following description, the cam 270 of this type cooperates with the cam driven roller 268 to move the cuckoo support 248.
constitutes cutter actuating means for swinging clockwise in FIG. 3A about the support shaft 246 to engage the cutter 258 with the boundary area 12 in the skirt wall 6 of the container M2. A hole 278 is formed in the sub-support body 21 and extends further inward in the radial direction from the notch. Projecting first support piece 250
A second spring means 280 constituted by a compression coil spring abutting is housed.

The second spring means 280 is connected to the first support piece 250.
is elastically biased in a counterclockwise direction in FIG. 1-A about the support shaft 246, and thus the second support piece 252 is biased via the third spring means 282, as will become clear from the following description. The cam follower roller 268 is elastically biased counterclockwise about the support shaft 246, thereby elastically pressing the cam driven roller 268 against the cam action surface 276 of the cam 270. Further, one end of a rod 286 is rotatably attached to the upper end of the second support piece 252 via a shaft 284.

On the other hand, a hole 288 is formed at the upper end of the first support piece 250, and the free end of the rod 286 fits into this hole 288.
8 is inserted. A male thread is formed at the free end of the rod 286, and a nut 290 is screwed into the male thread. Thus, the first support piece 250 and the second support piece 252
In FIG. 3-A, the upper end outer surface of the first support piece 250 is in contact with the nut 290 and there is some gap between the upper end inner surface of the first support piece 250 and the upper end outer surface of the second support piece 252. Relative rocking around the support shaft 246 between the illustrated state and a state in which the inner surface of the upper end of the first support piece 250 and the outer surface of the upper end of the second support piece 252 are in contact with each other. associated as possible. Furthermore, a first support piece 250
A rod 294 is rotatably attached to the upper end of the shaft 292 by means of a shaft 292 . The rod 294 extends toward the second support piece 252 , and its tip is screwed into a hole 296 formed in the second support piece 252 . The hole 296 has a shoulder 29 facing towards the first support piece 250.
8 is attached, and on the other hand, an annular flange portion 300 is formed on the loft 294. The third spring means 282 formed from a compression coil spring located outside the rod 294 is interposed between the shoulder portion 298 and the annular flange portion 300. The third spring means 282 exerts an elastic teratogenic effect on the first support member 250 that is somewhat stronger than the elastic teratogenic effect of the second spring means 280.
and the second support piece 252. Thus, the second support piece 252 is elastically biased counterclockwise in FIG. is pressed against the cam action surface 276 of
The support piece 250 of the first option is the third spring means 280.
the support shaft 24 relative to the second support piece 250
6 is elastically eccentric in the clockwise direction in FIG.
- Resiliently maintained in the position shown in Figure A.

Next, the effects of the mounting and cutting device 200 as described above will be summarized and explained. Concomitantly with the rotation of the rotation support body (not shown), the container lid 2 is
The main support 20 of the loading and cutting device 200 is conveyed through a predetermined circular path synchronously with the container 204 fitted on the
2 is lowered while being rotated about its central axis 208. When the main support body 202 is lowered by a predetermined amount or more, the container lid engaging tool 236 fixed to the sub support body 218 engages with the container M2, as shown in FIG. 3-B. In this way, as the main support 202 descends, the sub support 218
can no longer be lowered, and in response to the lowering of the main support 202, the sub-support 218 is raised relative to the main support 202 against the elastic teratogenic action of the first spring means 234. Thus, the container lid engaging member 236 fixed to the sub-support 236 is pressed against the container M2 by the elastic action of the first spring means 234, pressing the container M2 against the mouth and neck portion 206 of the container 204. At this time, since the container lid engaging tool 236 is being rotated clockwise when viewed from above in FIG. In FIG. 3-B, it is rotated clockwise when viewed from above. Thus, container M2
A female thread 14 (FIG. 1) formed on the inner surface of the main portion 8 of the skirt wall 6 is screwed into a female thread 302 formed on the outer peripheral surface of the neck portion 206. Due to this screwing,
The container M2 also moves vertically downward with respect to the mouth and neck part 206, and during such movement, the plurality of locking flap pieces 18 ( 1 and 2), a locking flange 30 located below the female thread 302 on the outer peripheral surface of the neck portion 206 is elastically bent radially outward.
Pass 4. When the locking flap piece 18 has completely passed through the locking flange 304, the locking flap piece 18 is elastically restored, and the upper edge (FIG. 2) of the locking flap piece 18 is attached to the locking flange 304.
It locks onto the bottom surface of the. Thus, the container lid 2 is attached to the mouth and neck 206.
are installed as required.

Therefore, during the mounting operation as described above, the main support 202
When the sub-support body 218 is raised relative to the The first support piece 250 and the second support piece 2
52 is pivoted clockwise in FIG. 3-B about the support shaft 246, so that the cutter 258 cuts the third
The spring means 282 is elastically pressed by the elastic action of the spring means 282. At the time when the cutter 258 is pressed against the boundary area 12 (FIGS. 1 and 2) of the skirt wall 6 of the container lid 2, the locking flap piece 18 (FIGS. 1 and 2) of the container M2 is pressed by the above-mentioned mounting action. It is preferable that the position is set to be at or immediately after passing the locking flange 304 of the mouth and neck part 206. Therefore, cutter-258
Since the cutter 25 itself is rotated about the central axis 20 in conjunction with the rotation of the main support 202, the cutter 25
8 rotates around the container lid 2 while being pressed against the boundary area 12 (FIGS. 1 and 2) in the skirt wall 6 of the container RM2. At this time, the cutter 258 rotates while rolling around the container lid 2, and thus the cutter 258 rotates while rolling around the container lid 2.
In the boundary area 12 (FIGS. 1 and 2) of the skirt wall 6 of FIG.
A rupture line is formed consisting of a slit cut by the slit and a residual portion, that is, a bridge portion, which is left uncut due to the interruption portion 264 present at the periphery of the cutter 258. Thereafter, the main support body 202 is raised, whereby the first support piece 250 and the second support piece 252 are moved around the support shaft 246 by the elastic force of the second spring means 278. In Fig. B, the cutter 258 is swung counterclockwise, and the cutter 258 is separated from the container M2, and then, as the auxiliary support 218 is raised, the container lid engaging member 236 is also lifted and separated from the container M2. Conveniently, the cutter 258 is configured to be pressed against the container M2, rotate around the container lid 2 once or slightly more, and then be released from the container lid 2. be.

The container lid 2 attached to the neck 20G of the container 204 is removed from the neck 206 as described above, and the neck 20G is removed.
06, put your finger on the main part 8 of the skirt wall 6 of the container lid 2 and turn it in the opposite direction to the mounting rotation direction, that is, the third
- Just rotate it counterclockwise in figure B. In this way, the female thread 14 (Fig. 1) of the container lid 2 is connected to the neck part 2.
06 along the male thread 302, and thus the container lid 2 is raised as it rotates. However, the container lid 2
In the pilfer-proof hem 10, a plurality of locking flap pieces 18 (FIGS. 1 and 2)
Since it is locked to the locking flange 304 of , it is prevented from rising. In this way, a considerable stress is applied to the bridging portion of the break line formed as described above, and the bridging portion is broken, and the container lid 2 becomes pilfer-proof hem 10 (FIGS. 1 and 2). and other parts. After that, the portion of the container lid 2 other than the pilfer-proof hem 10 freely rises as it rotates and is separated from the neck portion 206.

Above, one specific example of the mounting and cutting device constructed according to the present invention has been described in detail mainly with reference to FIGS. 3-A, 3-B, and 4. It goes without saying that the present invention is not limited to these specific examples, and that various modifications and modifications can be made without departing from the scope of the present invention.

For example, in the illustrated embodiment, a disc-shaped force having a plurality of interruptions 264, as shown in FIG.
8 is used, but for example, when there are multiple overhangs that overhang radially inward at intervals in the circumferential direction on the inner circumferential surface of the boundary area where the fracture line is to be generated, the interruption It is also possible to use a disk-shaped cutter with a continuous cutting blade to continuously cut the boundary area leaving only the overhang.

In addition, regarding the container lid 2 shown in FIGS. 1 and 2, that is, the container lid 2 in which a locking flap knob piece 18 of a specific form is formed on the inner surface of the pilfer-proof hem 10, mounting and cutting will be described. Although one specific example of the device has been described, the mounting and cutting device of the present invention can be applied to a container lid in which a locking flap piece of any type is formed on the inner surface of the pilfer-proof hem. .

〔Effect of the invention〕

As described above, according to the mounting and cutting device of the present invention, when the container lid is mounted on the mouth and neck of the container as required, the required portions of the skirt wall of the container lid, that is, the main portion and the pilfer proof A required breaking line is formed in the boundary area with the hem. Therefore, there is no need to perform a separate additional step to form a break line when forming the container lid by injection, stamping, etc., or after such forming.

[Brief explanation of the drawing]

FIG. 1 is a side view, partially in cross section, of an example of a synthetic resin container lid to which the mounting and cutting device of the present invention is applied. 2 is a partial perspective view showing a part of the container lid of FIG. 1; FIG. 3-A and 3-B are partial cross-sectional views showing one specific example of the device and cutting device constructed according to the present invention in different states. FIG. 4 is a plan view showing a cutter used in the mounting and cutting apparatus of FIGS. 3-A and 3-B. Container lid top wall Skirt wall Main part of the skirt wall Pilfer-proof hem of the skirt wall Boundary area of the skirt wall Female thread locking flap piece attachment and cutting device Main support body 204 ・ 206 ・ 218 ・ 236 ・ 248 ・ 250 ・252 ・ 258 ・ 268 ・ 270 ・ ・ 302 ・ ・ 304 ・ ・ Container, mouth and neck of container, sub-support body, container lid engagement tool, cutter support body, first support piece, second support piece・Cutter cam driven roller (cutter operating means) ・・Cam (canter operating means) ・・Male thread on neck and neck ・Locking flange on neck and neck Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A synthetic resin container lid that is fitted over a container neck and has a male thread formed on its outer peripheral surface and a locking flange located below the male thread, It comprises a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, a female thread is formed on the inner peripheral surface of the main part of the skirt wall to cooperate with the male thread of the mouth and neck part, and the skirt A container lid in which a plurality of locking flap pieces protruding radially inward are formed at intervals in the circumferential direction on the inner circumferential surface of the pilfer-proof hem located at the lower end of the wall, is attached in the axial direction. Press it downward and rotate it in a predetermined installation rotation direction while pressing it against the mouth and neck, thus screwing the female thread of the container lid onto the male thread of the mouth and neck, and locking the container lid. A flap piece is placed below the locking flange of the mouth and neck portion, and the upper edge of the locking flap piece is locked to the lower surface of the locking flange, and the main portion of the skirt wall of the container lid and the A mounting and cutting device for partially cutting the boundary area with the hem of the pilfer proof in the circumferential direction to generate a circumferentially extending fracture line; A main support body rotatably mounted around an axis, an elevating means for moving the main support body up and down, and a means for rotating the main support body in the mounting rotation direction about the central axis line. a rotation means; and a sub-support attached to the main support so as to be rotatable about the central axis together with the main support and movable up and down over a predetermined range in a vertical direction with respect to the main support. a first spring means interposed between the main support body and the sub-support body and elastically biasing the sub-support body vertically downward; a first spring means fixed to the sub-support body; a container lid engaging tool that is pressed against the container lid when the main support is lowered; a cutter support that is attached to the sub-support so as to be swingable over a predetermined range; and a cutter support that is rotatable on the cutter support. a disc-shaped cutter attached to the container; and a disc-shaped cutter interposed between the sub-support and the cutter support, the cutter support being in a non-operating position where the cutter is spaced radially outward from the container lid. a second spring means that is elastically biased; and a second spring means that resists the elastic biasing action of the first spring means due to the container lid engaging member being pressed against the container lid by the lowering of the main support. When the secondary support is raised relative to the main support, the cutter support is swung against the elastic biasing action of the second spring means, so that the cutter A mounting and cutting device characterized in that it comprises cutter actuating means for bringing the cutter into an operative position for acting on the boundary area between the main portion and the pilfer-proof hem in the skirt wall of the container lid. 2. The cutting blade formed on the outer periphery of the cutter has a
2. The mounting and cutting device of claim 1, wherein there are a plurality of circumferentially spaced interruptions. 3. The cutter actuating means is comprised of a cam provided on the main support and a cam driven roller attached to the cutter support and cooperating with the cam, or The mounting and cutting device according to paragraph 2. 4. The cutter support body is composed of a first support piece and a second support piece that are swingably connected to each other over a predetermined range, and the cutter is attached to the first support piece. the cam follower roller is mounted on the second support piece, and between the first support piece and the second support piece the cutter is oriented in the working position and A third spring means is interposed for elastically biasing the first support piece and the second support piece in the direction in which the cam follower roller is directed toward the cam. The mounting and cutting device according to item 3.