JPH08301317A - Device for forming axial score in container cap - Google Patents

Abstract

PURPOSE: To form an axial score of a required pattern, by moving a sliding body away from the center of a circular revolution orbit against the displacement action of an elastic displacement means and moving toward this, thereby positioning a cutting blade to an inside receiving device. CONSTITUTION: In the process where a roller 16 passes on a recessed surface 84a in the form of an arc, a cam follower member 80 is moved toward the center of a circular revolution orbit L, and then moved away from this center. An amount of this movement is equivalent to the depth (t) of the recessed surface 8. A cutting blade 70 mounted on the cam follower member 80 is moved together with the member 80. Therefore, in the passage of the roller 16 onto the recessed surface 84a, the cutting blade 70 acts on (cuts) the tamper-evident bottom of a container cap 20 when the cap 20, supported by an inside receiving device, revolves both round that center and on its axis, which accompanies the revolutions of a support shaft round the center and on its axis. Thus, two scores extending in the axial direction are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for forming an axially extending break line in a tamper-evidence skirt arranged on a skirt wall of a container lid.

[0002]

As is well known to those skilled in the art, a tamper-evidence characteristic (characteristic in which a trace of the tampering remains when the container is tampered with) is used as a container lid applied to a container for beverages or the like. The synthetic resin container lids that it has are widely used. A typical example of such a container lid has a top wall and a skirt wall depending from the peripheral edge of the top wall. A circumferential rupture line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is divided into a main part above the circumferential rupture line and a tamper-evident hem below the circumferential rupture line. Has been done. The circumferential break line includes a plurality of bridging portions arranged at intervals in the circumferential direction, and the tamper-evidence skirt is connected to the main portion of the skirt wall through the plurality of bridging portions. . On the inner surface of the main part of the skirt wall,
A female screw thread that is screwed into a male screw thread that is formed on the outer peripheral surface of the container opening is formed, and is formed on the outer peripheral surface of the container opening on the inner peripheral surface of the tamper evidence hem. Locking means for locking the locking jaws are formed, for example, locking flap pieces protruding inward in the radial direction from the inner peripheral surface of the tamper-evident skirt at intervals in the circumferential direction. At least one of the plurality of bridging portions in the circumferential breaking line is a non-breaking bridging portion having higher strength than the other bridging portions, and the tamper-evidence skirt has an axial direction extending in the axial direction. A break line is formed. When removing the container lid from the opening to open the container,
A plurality of bridging parts in the circumferential break line are broken, leaving only the non-broken bridging part, and the axial break line formed in the tamper evidence hem is broken, and the tamper evidence hem is broken. Is deployed from an endless annular shape to an endless belt shape, whereby the locking means of the tamper-evidence hem portion is released from the locking jaw of the opening.

The container lid of the above-mentioned form is usually formed by injection molding or compression molding of a suitable synthetic resin in a state in which the circumferential break line and the axial break line are not formed, and then the container lid is applied. It is manufactured by operating a cutting blade on the lid to perform a required cutting to form a circumferential break line and an axial break line. The apparatus used to form the circumferential break line and the axial break line is a support shaft that is revolved around a circular revolution path and is allowed to rotate, an inner receiver mounted on the support shaft, and a stationary support base. And a cutting blade fixed to the stationary support base. The inner receiving member mounted on the support shaft is inserted into the container lid, and the container lid is continuously revolved and rotated along with the revolution and rotation of the support shaft. At this time, a cutting blade extending along the circular revolution path acts on the skirt wall of the container lid to cut in the circumferential direction, thus forming a circumferential break line. There is also a cutting blade extending substantially perpendicular to the circular orbital path or in a direction slightly inclined therefrom, which cutting blade acts on the tamper-evident skirt of the container lid at least partially in the axial direction. Cut, thus forming an axial break line.

[0004]

The conventional apparatus as described above, however, has the following problems to be solved regarding the formation of the axial break line. Since the cutting blade for forming the circumferential break line extends in the revolving direction of the container lid, when the skirt wall of the container lid is cut by the cutting blade, the container lid extends beyond the cutting blade. It is possible to make the required cuts in the skirt wall of the container lid, which can be displaced in the directional direction and therefore without causing any particular problems. However, it is necessary that the cutting blade for forming the axial breaking line extends substantially perpendicular to or slightly inclined with respect to the revolution direction and the rotation direction of the container lid. Therefore, when cutting the tamper-evidence skirt of the container lid with such a cutting blade, the relative movement between the cutting blade and the tamper-evident skirt of the container lid is relative to the extending direction of the cutting blade. Vertical and somewhat inclined laterally only, no relative movement is created between the cutting blade and the tamper-evident skirt of the container lid in the direction of extension of the blade and the direction of cutting by the blade. . Therefore, the cutting action of the cutting blade on the tamper-evidence skirt is inherently unreasonable, especially if the tamper-evidence skirt has a large wall thickness, the cutting depth becomes excessively shallow, and the sharpness is also sharp. Cutting is not realized.

The present invention has been made in view of the above facts, and its technical problem is to improve the conventional device as described above, and a cutting blade for forming an axial breaking line is a container lid. When acting on the tamper evidence hem, it causes movement of the cutting blade in the cutting direction by the cutting blade and in the opposite direction, thus cutting the tamper evidence hem of the container lid sufficiently sharply at the required cutting depth. , It is possible to form the axial break line of the required form.

[0006]

In order to solve the above-mentioned technical problems, in the present invention, a cam member is mounted on a support shaft on which an inner support is mounted, and a stationary support for mounting a cutting blade. A sliding body is attached to the base so as to be movable in a direction toward and away from the center of the circular revolution orbit of the support shaft, and an elastic bias that elastically biases the sliding body in the direction toward the center of the circular revolution orbit. Means is provided, a cutting blade is attached to the sliding body, and a cam driven member is attached,
When the cutting blade acts on the tamper-evident skirt of the container lid, the cam member is brought into contact with the abutted surface of the cam driven member, and the sliding member is resistant to the biasing action of the elastic biasing means. The circular orbit is moved in a direction away from the center of the circular orbit, and in a direction toward this, so that the position of the cutting blade with respect to the inner support is defined.

That is, according to the present invention, as a device for solving the above technical problem, a support shaft that is revolved around a circular revolution path and is allowed to rotate, an inner receiver mounted on the support shaft, and a stationary support. A base and a cutting blade mounted on the stationary support base, and when the container lid supported by the inner support is revolved and revolved in association with the revolution and rotation of the support shaft, In a device in which the cutting blade acts on the tamper-evident skirt of the container lid to form a break line extending in the axial direction, a cam member is mounted on the support shaft, and the stationary support base is A sliding body is mounted so as to be movable in a direction toward the center of the circular revolution track and away from the circular revolution track, and elastic biasing means for elastically biasing the sliding body in the direction toward the center of the circular revolution track is provided. The cutting blade is And a cam follower member is attached to the sliding body, and when the cutting blade acts on the tamper-evident skirt of the container lid, the cam member is covered by the cam follower member. Abutting against the abutment surface, the sliding body is moved against the biasing action of the elastic biasing means in a direction away from the center of the circular revolution trajectory and in a direction towards it, whereby the inside An apparatus is provided, characterized in that the position of the cutting blade with respect to the receiver is defined.

The cam member comprises a roller rotatably mounted on the support shaft and having a cylindrical outer peripheral surface having a common axis with the support shaft, and the abutted surface of the cam follower member. Is defined by an arcuate concave surface extending along the circular orbit, and the radius R of the arcuate concave surface and the radius r of the roller preferably have a relationship of r ≦ R. Preferably, the relationship between the radius R of the arcuate concave surface and the radius r of the roller is 1.3r ≦ R ≦ 1.6r. The abutted surface of the cam driven member is located outside the circular revolution path and faces the center of the circular revolution path,
It is preferable that the elastic biasing means elastically biases the sliding body in a direction toward the center of the circular revolution path.

[0009]

In the device constructed in accordance with the present invention, when the cutting blade acts on the tamper-evident skirt of the container lid, it is supported against the abutted surface of the cam follower member mounted on the sliding body. By the action of the cam member mounted on the shaft, the sliding body on which the cutting blade is mounted moves in the direction toward and away from the center of the circular revolution path of the support shaft, that is, in the cutting direction by the cutting blade and in this direction. On the other hand, they can be moved in the opposite direction. Therefore, while the container lid is continuously rotating and revolving along with the revolution and rotation of the support shaft, the tamper evidence hem of the container lid is cut sharply with the required cutting depth, A form break line can be formed.

When the main portion of the abutted surface of the cam driven member is a plane extending linearly, the moving distance of the cutting blade in the direction toward and away from the center of the circular revolution path of the container lid is It is uniquely defined only by the curvature of the circular orbit. Therefore, in order to set the cutting depth of the cutting blade with respect to the tamper-evidence skirt to a predetermined value, the time when the cutting blade separates from the tamper-evident skirt from the time when the cutting blade begins to act on the tamper-evident skirt. It is necessary to make the revolving and rotating movement distances of the container lid during the period up to a considerable length. And in such a case, the cutting action by the cutting blade becomes dull,
The lateral movement of the cutting blade with respect to the tamper-evident skirt of the container lid tends to expand the cut in the width direction on the surface of the tamper-evident skirt. However, the cam member is composed of a roller rotatably mounted on the support shaft and having a cylindrical outer peripheral surface having a common axis with the support shaft, and at least the main part of the contact surface of the cam driven member is circularly revolved. When it is made an arcuate concave surface extending along the track and the radius R of this arcuate concave surface is made larger than the radius r of the roller, cutting in the direction toward and away from the center of the circular revolution path of the container lid. The moving distance of the blade is obtained by adding the effect of the curvature of the circular revolution path and the effect of the curvature of the arcuate concave surface. Therefore, the cutting blade separates from the tamper-evidence skirt from the time when the cutting blade begins to act on the tamper-evidence skirt, which is necessary to set the cutting depth of the cutting blade with respect to the tamper-evident skirt to a predetermined value. By the time, the revolving and rotating lengths of the container lid can be shortened as much as possible, and thus a sufficiently sharp cutting can be realized, and an uncertain cutting width expansion in the axial breaking line can be realized. Can be sufficiently suppressed or avoided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus for forming an axial breaking line on a container lid, constructed according to the present invention, will be described below with reference to FIGS. First, mainly with reference to FIGS. 1 and 2, a rotary support 2 of which only a part is shown is rotatable about a support shaft (not shown) fixed on the stationary base 1 so as to extend in the vertical direction. Supported by. The support shaft is located on the left side of FIG. The rotary support 2 is drivingly connected to a drive source such as an electric motor (not shown), and is rotationally driven at a predetermined speed in the direction of arrow A in FIGS. 1 and 4, and in the counterclockwise direction when viewed from above in FIG. A support member 2a is fixed to the lower peripheral edge of the rotary support 2,
The support shaft 32 is supported by the support member 2a via bearings 2c and 2d so as to be movable in the axial direction.

The support shaft 32 has a vertical axis. A bracket 32a including a horizontal portion and a vertical portion is fixed to the lower end of the support shaft 32. A horizontal axis is provided on the vertical portion of the bracket 32a, and the roller 32 is attached to the horizontal axis.
b is rotatably supported. On the other hand, a stationary annular body 3 is provided on the stationary base 1. The stationary annular body 3 has an endless circular shape along an axis common to the axis of the support shaft of the rotary support 2, and has a channel-shaped annular cam that is radially outwardly opened along the entire outer peripheral portion thereof. The groove 3a is formed. The roller 32b of the support shaft 32 is engaged with the annular cam groove 3a. Therefore, the support shaft 32 is supported by the annular cam groove 3a via the roller 32b.
The roller 32b functions as a cam driven member by being engaged with the annular cam groove 3a. The annular cam groove 3a is
Although not shown, it has a low area extending horizontally in the circumferential direction, a high area extending horizontally in the circumferential direction, and an inclined area connecting them. The roller 32b has an annular cam groove 3
The support shaft 32 is positioned at the lowermost position when it is in the lower region of a, and the support shaft 32 is positioned at the highest position when the roller 32b is in the high region of the annular cam groove 3a. Thus, when the support shaft 32 is rotated in association with the rotation of the rotary support 2, the support shaft 32 is moved up and down according to the locus of the annular cam groove 3a. Such a cam mechanism constitutes up-and-down moving means. Such raising and lowering will be described later.

A block-shaped support 4 is supported on the upper end of the support shaft 32. The support body 4 is supported by the support shaft body 32 via a flange portion 34 formed on the upper end portion of the support shaft body 32.
It is stuck to. One vertical side surface 2d is formed on the outer peripheral portion of the rotary support 2 to support the rotary support 2 of the support 4.
One vertical side surface 4a is provided at a portion facing the vertical side surface 2d.
And the vertical side surface 4a of the support body 4 is
The vertical side surface 2d is slidably contacted in the vertical direction. A stripper 8 is fixed to the upper end of the support body 4. A through hole 12 is formed in the horizontal portion 10 of the stripper 8. The function of the stripper 8 will be described later.

A through hole 22 is formed in the support 4. Large diameter portions are formed in the upper and lower portions of the through hole 22, respectively. An upper thrust bearing 24 and a lower thrust bearing 26 are arranged in each large-diameter portion.
A receiving shaft 28 is supported via 4 and 26 so as to be rotatable and axially movable. At the upper end of the receiving shaft 28,
A disc-shaped receiving portion 30 having a larger diameter than that is integrally formed. The receiving portion 30 is positioned above the upper thrust bearing 24. The lower thrust bearing 26 is held in the large diameter portion so as not to move in the axial direction by the upper end of the support shaft body 32 fixed to the lower side of the support body 4.

A hole 36 having a predetermined depth is formed along the axis of the support shaft 32 at the upper end thereof. The lower end of the receiving shaft 28 is positioned so as to project into the hole 36. A compression coil spring 38 is interposed between the lower end of the receiving shaft 28 and the thrust bearing 37 arranged at the bottom of the hole 36. Therefore, the receiving shaft 28 including the receiving portion 30
Is always urged vertically upward by the compression coil spring 38. At the lower end of the receiving shaft 28, the receiving shaft 2
A washer with a diameter larger than 8 is fastened and fixed to two nuts. This washer is arranged facing the lower side of the lower thrust bearing 26. Therefore, the upward movement of the receiving shaft 28 is restricted by the washer contacting the lower thrust bearing 26. Further, the downward movement of the receiving shaft 28 is restricted by the receiving portion 30 contacting the upper thrust bearing 24. On the receiving portion 30 of the receiving shaft 28, as will be mentioned later, the container lid 20 is placed in an inverted state with its opening portion facing upward.

Although not clearly shown in FIG. 2, an upper support 6 is integrally provided above the rotary support 2. The upper support 6 is arranged above the stripper 8 with a predetermined space. A support shaft 14 extending in the vertical direction is supported by the upper support 6 so as to be rotatable and immovable in the axial direction (vertical direction). The support shaft 14, the through hole 12 of the stripper 8, the receiving shaft 28, and the support shaft body 32 have one common vertical axis. The support shaft 14 extends downward in the vertical direction of the upper support 6, and the lower end portion thereof is positioned at a lower position penetrating the through hole 12. Although not shown in the drawing, a rotation means for rotating the support shaft 14 along with the rotation of the rotation support 2 is disposed above the upper support 6. The rotation means (not shown) includes a planetary gear fixed above the support shaft 14 and a stationary ring gear having an axis common to the rotary support 2. The planet gear is meshed with the stationary ring gear. Such a configuration is disclosed in, for example, Japanese Patent Laid-Open No. 61-287560, and is a technique well known to those skilled in the art. When the rotary support 2 rotates, the support shaft 14 revolves in the direction of arrow A in FIGS. 1 and 4 through a circular orbit, and by the action of the rotating means, the arrow B in FIGS.
It can be rotated in the direction. The dashed-dotted line L in FIGS. 1 and 4 indicates the circular revolution path of (the axis of) the support shaft 14. The center of the circular revolution path L is the axis of the support shaft of the rotary support 2.

A roller 16 as a cam member is provided on the support shaft 14.
Is rotatably mounted. The roller 16 is the support shaft 14
And a roller bearing having a cylindrical outer peripheral surface (cam surface) having the same axis as the support shaft 14. An inner holder 18 is provided at the lower end of the support shaft 14.
Is installed. The inner diameter of the through hole 12 of the stripper 8 is formed to be larger than the maximum outer diameter of the inner receiving member 18, but is slightly smaller than the maximum outer diameter of the container lid 20 held by the inner receiving member 18. Has been done. When the support shaft body 32 is raised by the elevating / lowering means in a state where the container lid 20 is placed on the receiving portion 30 of the receiving shaft 28 with its opening portion facing upward, the supporting body 32 is integrally supported with the supporting shaft body 32. The body 4, the stripper 8, the receiving portion 30 of the receiving shaft 28, and the container lid 20 are also raised. The inner support 18 mounted on the support shaft 14 that does not move in the axial direction also does not move in the same direction. Therefore, since the inner receiver 18 relatively passes first through the through hole 12 of the stripper 8 and is then inserted into the container lid 20 through the opening, the container lid 20 is supported by the inner receiver 18. It is detachably held by the shaft 14. The state in which the inner holder 18 is inserted into the container lid 20 (see FIG. 2)
In the above, when the rotary support 2 rotates, the support shaft 14 revolves while revolving, so that the container lid 20 revolves while revolving integrally with the support shaft 14 through the inner support 18. That is, the container lid 20 supported by the inner receiving member 18 is revolved and revolved along with the revolution and rotation of the support shaft 14. Further, when the support shaft 32 is lowered by the lifting / lowering means, the stripper 8 is also lowered integrally therewith, so that the container lid 20 is reliably separated from the inner receiving member 18 and placed on the receiving portion 30. It

A stationary support base 40 is also provided on the stationary base 1. The stationary support base 40 includes the support shaft 1
It is positioned on the outer side in the radial direction of the circular orbit L of 4,
The upright frame 42 has a lower end fixed to the stationary base 1, and a support base 44 provided on the upper end of the upright frame 42. The support base 44 is formed to extend in an arc shape and horizontally along the circular revolution path L. Support base 4
A pedestal 46, which is substantially rectangular when viewed from above, is fixed to the upper part 4 by bolts 48 and 49. A slide body 50 is mounted on the cradle 46. The sliding body 50 includes a sliding member 52 and a block member 58 fixed to the sliding member 52 with bolts 54 and 56. The sliding member 52 is movably attached to the pedestal 46 by a known sliding means so as to be movable in a direction toward the center of the circular revolution path L and in a direction away from the center. Although not shown in the drawing, the sliding means forms, for example, a “deep groove” on the pedestal 46,
It can be easily configured by forming “there” on the sliding member 52 and fitting these.

A cradle 46 provided on the stationary support base 40
And the sliding body 50 between the sliding body 50 and the circular orbit L
Elastic biasing means 6 for elastically biasing in the direction toward the center of the
0 is set. The elastic biasing means 60 includes a cradle 46
Two compression coil springs 6 arranged between the upright wall member 64 and the block member 58, which are fixed to each other by bolts 62.
6. The upright wall member 64 has an L-shape when viewed from the direction shown in FIG. 2, and its horizontal portion is fixed to the pedestal 46 with bolts 62. The upright wall member 64 and the block member 58 are provided with two concave portions having a circular cross section, and the compression coil spring 66 is provided between the opposing concave portions.
Has been inserted. Arrangement position of each compression coil spring 66,
Therefore, the formation position of the concavities facing each other is determined by the circular orbit L
At the same height, spaced in the direction along. Reference numeral 68 is a screw rod screwed to the block member 58, and is arranged at an intermediate position of each compression coil spring 66 as shown in FIG. The screw rod 68 projects outward through a through hole (larger diameter than the screw rod 68) (not shown) formed in a corresponding portion of the upright wall member 64. Two nuts 69, which are stoppers, are locked at predetermined positions on the protruding portion of the screw rod 68. Nut 6
9 has a function of restricting the movement of the sliding body 50 biased by each of the compression coil springs 66.

1 to 4, a cutting blade 70 is attached to the sliding body 50. More specifically, the holding member 74 is fixed to the central portion of the substantially rectangular base 72 with bolts 75. Mounting holes 78 are formed in both ends of the base 72. The groove 7 is formed in the holding member 74.
6 is formed, and the cutting blade 70 is inserted and held in the groove 76. The cutting blade 70 is composed of two cutting blades 70a and 70b which are inserted and held in the groove 76 adjacent to each other. Although not shown, the two cutting blades 70a and 70a
b can be held in the groove 76 by screwing a bolt into a screw hole formed so as to penetrate from the side surface 74 a of the holding member 74 into the groove 76. The side surface 74a is formed parallel to the groove 76. The cutting blade unit (the assembly shown in FIG. 3) is assembled as described above. This cutting blade unit is attached to the sliding body 50. That is,
This mounting is performed by fixing the base 72 to the end of the sliding member 52 on the circular revolution orbit L side with two bolts 79. Each bolt 79 is engaged with a screw hole (not shown) formed in the sliding member 52 by utilizing the hole 78 for mounting the base 72. The cutting blade 70 is a container lid 20.
Of the vehicle, and extends in a direction substantially perpendicular to the directions of the revolution and the rotation, and is slightly inclined toward the circular revolution trajectory L toward the downstream side (direction of arrow A) when viewed from the top surface.

A cam driven member 80 is further mounted on the sliding body 50. The cam follower member 80 has a substantially rectangular shape when viewed from above, and is fixed to the end of the block member 58 of the sliding body 50 on the circular revolution orbit L side by two bolts 82. The cam follower member 80 is positioned directly above the cutting blade unit with a gap. The numeral 86 indicates a through hole formed in the cam driven member 80. Each of the through holes 86 is positioned coaxially with each of the bolts 79 for mounting the base 72, and is therefore a hole for tightening each bolt 79. Cam follower 80
A contact surface 84 is formed on the surface of the roller 16. The contact surface 84 is supported by the support shaft 14 and contacts the cam surface of the roller 16 revolving in the direction of arrow A along the circular orbit L. The contacted surface 84 is located on the outer side in the radial direction of the circular revolution track L, extends substantially in the tangential direction thereof, and faces the center of the circular revolution track L. The abutted surface 84 includes a main portion 84a located at the central portion in the tangential direction and auxiliary portions 84 located on both sides thereof.
b and 84c. The auxiliary portions 84b and 84c are defined by a linear plane extending along the tangential direction,
The main portion 84a is defined by an arcuate concave surface extending along the circular revolution path L. Linear planes 84b and 84c
Are coplanar. Arcuate concave surface 84a
The radius R of the roller 16 and the radius r of (the cam surface of) the roller 16 have a relation of R = 1.6r in the illustrated embodiment. The depth t of the arcuate concave surface 84a from the straight planes 84b and 84c corresponds to the cutting depth of the cutting blade 70 with respect to the container lid 20, as will be apparent from the description below.

Next, the operation of the device will be described. Although not shown in the drawings, the devices of the present invention are located between a container lid supplying device and a container lid discharging device and are operated in cooperation with each device, which are well known to those skilled in the art. To be By the operation of the container lid supply device, the container lid 20 is supplied on the receiving portion 30 of the receiving shaft 28 provided on the rotary support body 2 in an inverted state with the opening thereof facing upward.
At this container lid supply position, the support shaft 32 is moved to the lowest position by the elevating means, and the stripper 8
Is located below the inner receiver 18. Along with the rotation of the rotary support 2 in the direction of arrow A, the support shaft 32 (and the support 4 and the stripper 8 integrally with this) are gradually raised by the lifting / lowering means, and the through hole 12 of the stripper 8 is formed. After passing through the inner receiving portion 18, the opening portion of the container lid 20 has the inner receiving portion 1
8 can be moved towards it in such a way as to be received therein. When the support shaft 32 is raised to the uppermost end, the inner surface of the top wall of the container lid 20 contacts the lower end of the inner receiving member 18, and the receiving portion 30 moves downward against the elastic biasing force of the coil spring 38. The upper thrust bearing 24 is pressed against the upper surface of the upper thrust bearing 24. Thus, the upper thrust bearing 24, the receiving portion 30, the container lid 20 and the inner receiving member 18 are brought into close contact with each other,
The receiver 30 presses the container lid 20 against the inner receiver 18. The support shaft 14 and the inner support 18 are revolved (direction of arrow A) and rotated (direction of arrow B) through the circular revolution path L in association with the rotation of the rotary support 2 in the direction of arrow A. The container lid 20 and the receiving portion 30 are also revolved and revolved integrally with them.

The cutting blade 70 is arranged at a predetermined circumferential position of the circular orbit L, and that position is the container lid 20.
Is on the downstream side of the position where the inner holder 18 is held as described above. When the cutting blade 70 acts on the tamper-evident skirt of the container lid 20, the roller 16 is brought into contact with the contacted surface 84 of the cam driven member 80, and the sliding member 5 is moved.
0 is moved in the direction away from the center of the circular revolution path L and in the direction toward this against the elastic biasing action of the coil spring 66. This allows the inner receiver 18
The position of the cutting blade 70 with respect to is defined.

That is, when the container lid 20 passes the mounting position of the cutting blade 70 while revolving and revolving, the roller 16 supported by the support shaft 14 is first moved by the cam follower member 80.
The contact is made to abut on the linear flat surface 84b which is the abutted surface (see position A1 in FIG. 4). In this state, as the roller 16 moves in the direction of arrow A along the circular revolution path L, the cam follower member 80 integrated with the sliding body 50 causes the coil spring 66 to move.
It is moved in the direction away from the center of the circular orbit L (rightward in FIGS. 1 and 2 and downward in FIG. 4) against the biasing action of the. The roller 16 has a linear plane 84b and an arcuate concave surface 84.
When the cam driven member 80 is moved to the position A2 where it abuts the boundary with a, the cam driven member 80 is moved to the maximum separation position (the position shown by the chain double-dashed line in FIG. 4) from the center of the circular revolution path L. When the roller 16 further moves, the linear flat surface 84b is brought into contact with the arcuate concave surface 84a. As the roller 16 moves in this state, the cam follower 80 is moved in the direction toward the center of the circular revolution path L. When the roller 16 moves to the position A3 where it abuts the bottom of the arcuate concave surface 84a, the cam driven member 80 is moved from the center of the circular revolution path L to the maximum approach position (the position shown by the solid line in FIG. 4). The roller 16 has an arcuate concave surface 84a and a linear flat surface 84c.
When the cam driven member 80 is moved to a position (not shown) that comes into contact with the boundary with, the cam driven member 80 is moved again to the maximum separated position from the center of the circular revolution path L. When the roller 16 further moves, it is brought into contact with the linear flat surface 84c from the arcuate concave surface 84a, and is separated from the cam driven member 80 via the position A4 (the position shown by the chain double-dashed line in FIG. 4).

As is apparent from the above description, the roller 1
In the process in which 6 passes through the arcuate concave surface 84a, the cam driven member 80 is moved in the direction toward the center of the circular revolution path L, and then in the direction away from the center. This amount of movement is the depth t of the arcuate concave surface 84a.
Equivalent to. Cutting blade 70 mounted on cam driven member 80
Is also moved integrally with the cam follower member 80. Therefore, in the process in which the roller 16 passes through the arcuate concave surface 84a, the container lid 20 supported by the inner receiving member 18 is supported by the support shaft 1
When revolving and rotating along with the revolution of 4 and rotation,
The cutting blade 70 acts (cuts) on the tamper-evident skirt of the container lid 20. Then, between the time when it begins to act like this and the time when it separates, two rupture lines extending in the axial direction are formed in the tamper-evidence skirt at predetermined intervals at intervals in the circumferential direction.

Although not shown, the rotary support 2
In addition, a plurality of support shafts 14 and members related thereto (support shaft bodies 32, etc.) having substantially the same configuration as described above.
Are provided at predetermined intervals in the circumferential direction. Then, before the roller 16 supported by the support shaft 14 is separated from the cam driven member 80 as described above, the roller 16 supported by the next support shaft 14 is formed on the linear plane 84b of the cam driven member 80. Each support shaft 14 so that they can be brought into contact with each other.
It is preferable that the circumferential spacing of is defined. With such an arrangement, the amount of reciprocating movement of the sliding body 50 can be minimized, and the movement can be performed smoothly.

With the rotation of the rotary support 2, the roller 1
After 6 is separated from the cam driven member 80, the support shaft 32
Is moved to the lowest position again by the ascending / descending means. When the stripper 8 descends, the container lid 20 is separated from the inner receiving member 18 and placed on the receiving portion 30. As the receiving portion 30 is released from the upward pressing action, the elastic biasing action of the coil spring 38 causes the receiving portion 30 to move as shown in FIG.
It is positioned at a predetermined position slightly elevated from the position shown in. The container lid 20 is thus transferred in the downstream direction and discharged from the receiving portion 30 by the action of the container lid discharging device.

The cutting blade 70 is for forming an axial breaking line on the container lid 20, but for forming a circumferential breaking line on the container lid 20 on the upstream side in the circumferential direction of the cutting blade 70. It is preferable to arrange one or more cutting blades. By arranging in this way, the container lid 20
In the process of revolving while rotating, the container lid 20
A predetermined circumferential break line is formed on the tamper-evidence skirt of, and then the cutting blade 70 forms the axial break line as described above. Thus, while the container lid 20 fed from the container lid feeding device is fed to the container lid discharging device via the device, a predetermined circumferential breaking line and axial breaking line are formed on the tamper evidence hem. Is formed.

The radius R of the arcuate concave surface 84a and the radius r of the roller 16 preferably have a relationship of r≤R. Preferably, the relationship between the radius R of the arcuate concave surface and the radius r of the roller is 1.3r ≦ R ≦ 1.6r. Arcuate concave surface 84a
By associating the radius R of the cutting blade 70 with the radius r of the roller 16 as described above, the cutting blade 70 necessary for setting the cutting depth of the cutting blade 70 with respect to the tamper-evidence skirt of the container lid 20 to a predetermined value. It is possible to shorten the revolution and rotation movement lengths of the container lid 20 as much as possible from the time when the cutting blade 70 starts to act on the tamper evidence skirt to the time when the cutting blade 70 separates from the tamper evidence hem. . Thus, it is possible to realize a sufficiently sharp cutting,
It is possible to sufficiently suppress or avoid unintentional expansion of the cutting width in the axial breaking line. When r = R, the moving length can be minimized. However, when it is desired to increase the revolution speed and the revolution speed of the container lid 20 in consideration of the followability of the coil spring 66 that elastically abuts the cam driven member 80 on the roller 16,
The relationship of 1.3r ≦ R ≦ 1.6r is more preferable in order to achieve the above effect (precisely forming a predetermined axial break line). In this sense, R = 1.
The relationship of 3r is suitable for relatively low speed machining. Further, the relation of R = 1.6r in the above-mentioned embodiment is suitable for relatively high speed machining, and improves the productivity.

The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes or modifications can be made without departing from the scope of the present invention. It is possible. For example, in the embodiment described above, the contacted surface 84 of the cam follower member 80 has the main portion 8
4a and auxiliary portions 84b and 84c located on both sides thereof, the auxiliary portions 84b and 84c are defined by a straight plane, and the main portion 84a is defined by an arcuate concave surface extending along the circular revolution path L. However, the auxiliary portions 84b and 84c may be defined by an arcuate concave surface parallel to the circular revolution path L instead of being defined by a linear plane. According to this configuration, the cam follower 80 and the roller 16 can be brought into contact with each other more smoothly, and uneven wear of the cam follower 80 and the roller 16 can be reliably prevented, and the processing accuracy can be improved. it can. Further, since the reciprocating movement of the sliding body 50 is performed more smoothly, it is possible to more sufficiently cope with high speed machining.

[0031]

According to the present invention, when the cutting blade for forming the axial breaking line acts on the tamper-evident skirt of the container lid that revolves and rotates, the cutting direction by the cutting blade and the opposite direction. The movement of the cutting blade in (1) can be generated, and thus the tamper-evident hem of the container lid can be cut sufficiently sharply at the required cutting depth to form the axial break line of the required shape. Moreover, it is possible to sufficiently suppress or avoid unintentional expansion of the cutting width at the axial break line.

[Brief description of drawings]

FIG. 1 is a top view showing a main part of an embodiment of an apparatus configured according to the present invention.

FIG. 2 is a reduced vertical cross-sectional view of FIG.

FIG. 3 is a perspective view showing a mounted state of a cutting blade.

FIG. 4 is a schematic top view showing a main part of the present invention.

[Explanation of symbols]

 1 stationary base 2 rotary support 3 stationary annular body 3a annular cam groove 4 support 8 stripper 14 support shaft 16 roller 18 inner receiver 20 container lid 28 receiver shaft 30 receiver 32 support shaft 32a roller 40 stationary support base 50 Sliding body 60 Elastic biasing means 70 Cutting blade 80 Cam driven member 84 Abutting surface 84a Main part (arc-shaped concave surface) 84b and 84c Auxiliary part (linear plane) L Circular orbit

Claims (3)

[Claims] 1. A support shaft, which is revolved around a circular revolution path and is allowed to rotate on its own axis, an inner support attached to the support shaft, a stationary support base, and a cutting blade attached to the stationary support base. When the container lid supported by the inner support is revolved and revolved in association with the revolution and rotation of the support shaft, the cutting blade acts on the tamper-evident skirt of the container lid. In a device having a form that forms a breaking line extending in the axial direction, a cam member is mounted on the support shaft, and the stationary support base is movable in a direction toward and away from the center of the circular revolution path. A sliding body is attached to the sliding body, and elastic biasing means for elastically biasing the sliding body in a direction toward the center of the circular orbit is provided, and the cutting blade is mounted on the sliding body. A cam follower is attached to the sliding body. When the cutting blade acts on the tamper-evident skirt of the container lid, the cam member is brought into contact with the abutted surface of the cam follower member so that the sliding body is elastically biased. Moving against and away from the center of the circular orbit against the biasing action of the means, thereby defining the position of the cutting blade with respect to the inner receiver. apparatus. 2. The cam member comprises a roller rotatably mounted on the support shaft and having a cylindrical outer peripheral surface having a common axis with the support shaft. At least a main part of the contact surface is defined by an arcuate concave surface extending along the circular orbit, and a radius R of the arcuate concave surface and a radius r of the roller have a relationship of r ≦ R. The described device. 3. The relationship between the radius R of the arcuate concave surface and the radius r of the roller is 1.3r ≦ R ≦ 1.6r.
The described device.