CN109789591B

CN109789591B - Cutting device and blister packaging machine

Info

Publication number: CN109789591B
Application number: CN201780059616.8A
Authority: CN
Inventors: 平田慧
Original assignee: CKD Corp
Current assignee: CKD Corp
Priority date: 2016-11-29
Filing date: 2017-05-29
Publication date: 2020-12-18
Anticipated expiration: 2037-05-29
Also published as: KR102154768B1; TW201819252A; JP6527125B2; WO2018100770A1; CN109789591A; KR20190088965A; TWI668160B; JP2018086706A

Abstract

The invention aims to provide a cutting device which can facilitate the assembling operation and the disassembling operation of a rotary knife and the like, and a blister packaging machine with the cutting device. In the blister packaging machine of the present invention, a cutting device (19) for cutting blister packages from a blister film (35) comprises: a lower rotating shaft (62) and an upper rotating shaft (72) which are arranged vertically with the bubble cap film (35) therebetween; a drive motor (53) that rotationally drives the lower rotating shaft (62) and the upper rotating shaft (72); a lower rotary cutter (66) mounted on the lower rotary shaft (62); a pair of upper rotary knives (76) installed on the upper rotary shaft (72) corresponding to the lower rotary knives (66); a coil spring biasing the pair of upper rotary knives (76); and a spacer provided on each of the facing surfaces of the pair of upper rotary knives (76) and having an inclined cam surface inclined in the axial direction; the distance between the pair of upper rotary knives (76) in the axial direction is variable by relatively rotating and displacing the pair of upper rotary knives (76).

Description

Cutting device and blister packaging machine

Technical Field

The present invention relates to a cutting device for cutting a band-shaped workpiece (work) in a conveyance direction, and a blister packaging machine including the cutting device.

Background

Generally, a blister pack (blister pack) is composed of a container film formed with a pocket (pocket) portion capable of accommodating an object to be accommodated and a cover film (cover film) attached to the container film in such a manner as to seal an opening of the pocket portion in which the object to be accommodated is accommodated.

The blister pack is manufactured by the following steps: forming a bag portion while conveying a band-shaped container film; filling the bag with the material to be stored; a step of attaching a cover film to the container film so as to seal the opening side of the bag portion; and cutting the final product, i.e., the blister pack, from the strip-shaped blister film formed by mounting the two films.

In the step of cutting the blister pack from the blister film, a slitting device (slitter) of a slit type (slitter) for slitting the blister film in the conveying direction is generally used.

The cutting device is configured to: the upper rotary blade provided on the upper side of the conveyed belt-shaped workpiece and the lower rotary blade provided on the lower side of the workpiece are rotated in opposite directions overlapping each other, thereby cutting the workpiece between the two rotary blades.

However, if the cutting edge of the upper rotary cutter and the cutting edge of the lower rotary cutter overlap each other when cutting a workpiece, there is a risk that workability is poor when performing maintenance (maintenance) work such as replacement and cleaning of the rotary cutters.

In contrast, in recent years, there has been known a cutting device capable of vertically separating an upper blade mechanism section having an upper rotary blade and a lower blade mechanism section having a lower rotary blade (see, for example, patent document 1 below).

Documents of the prior art

Patent document

Japanese patent application laid-open No. 2014-131822 of patent document 1

Disclosure of Invention

Problems to be solved by the invention

However, the upper and lower rotary knives are generally assembled such that one rotary knife is pushed against the other rotary knife in the direction of the rotary shaft by a biasing mechanism such as a spring. Therefore, when the upper and lower rotary knives are separated (disassembled) in the vertical direction by force in this state, the cutting edge of the rotary knife may be broken. Of course, in the cutting device having the above-described configuration, the same problem may occur when the upper and lower rotary knives are assembled in the vertical direction.

Therefore, there is a risk that the assembly work and the disassembly work of the upper and lower rotary knives are complicated in the known art.

The present invention has been made in view of the above circumstances, and it is a main object of the present invention to provide a cutting device capable of facilitating the assembly operation and the disassembly operation of a rotary knife, and a blister packaging machine including the cutting device.

Means for solving the problems

Hereinafter, preferred means for solving the above problems will be described in sections. Further, if necessary, a specific action and effect are added to the corresponding mechanism.

A cutting device for cutting a strip-shaped workpiece in a conveying direction, comprising:

a1 st rotating shaft and a2 nd rotating shaft which are respectively arranged on both sides across the workpiece and take a direction orthogonal to a conveying direction of the workpiece as an axial direction;

a drive mechanism capable of rotationally driving the 1 st and 2 nd rotary shafts;

a1 st rotary knife attached to the 1 st rotary shaft;

a pair of rotating bodies mounted on the 2 nd rotating shaft, at least one of which has a2 nd rotating blade corresponding to the 1 st rotating blade and is provided so as to be displaceable in the axial direction;

a biasing mechanism capable of biasing at least one of the pair of rotary bodies having the 2 nd rotary knife toward the other side; and

a projection (cam portion) which is provided along the rotation direction of the rotating bodies and projects in the axial direction on the surface of the pair of rotating bodies facing each other, and which has at least an inclined cam surface inclined in the axial direction on the side of the projection direction;

performing an opening operation of expanding the interval in the axial direction of the pair of rotating bodies while sliding the inclined cam surfaces of the pair of rotating bodies against each other by relatively rotationally displacing one of the pair of rotating bodies with respect to the other in a1 st direction (for example, a clockwise direction when viewed from the non-facing surface side of each rotating body) around the 2 nd rotation axis;

by relatively rotating and displacing one of the pair of rotating bodies in a2 nd direction (for example, a counterclockwise direction when viewed from a non-facing surface side of each rotating body) about the 2 nd rotation axis in a direction opposite to the 1 st direction with respect to the other direction, a closing operation is performed in which the interval in the axial direction of the pair of rotating bodies is reduced while the inclined cam surfaces of the pair of rotating bodies slide against each other.

According to the mechanism 1, the distance in the axial direction between the pair of rotating bodies can be changed simply by relatively rotating and displacing the pair of rotating bodies. As a result, the assembly work and the disassembly work of the 1 st and 2 nd rotary knives can be facilitated.

The cutting device according to the present invention is the cutting device according to the present invention, wherein the cutting device according to the present invention comprises at least one rotary blade group including the 2 nd rotary blade on both sides of the pair of rotary bodies, and the 2 nd rotary blade is offset from both sides of the 1 st rotary blade in the axial direction.

In the cutting device of the prior art having the structure of the mechanism 2, when performing the assembly operation and the disassembly operation of the rotary blade group (the 1 st rotary blade and the pair of 2 nd rotary blades), for example, the operator manually performs a series of operations as follows: a predetermined jig is inserted between a pair of 2 nd rotating blades, and a predetermined spacer member is interposed between the pair of 2 nd rotating blades while prying the pair of 2 nd rotating blades apart against a biasing force of a biasing mechanism. Therefore, in the cutting device of the prior art having the structure of the mechanism 2, the assembly work and the disassembly work of the rotary cutter group are very complicated.

Further, when there are a plurality of sets of the rotary cutter sets, the operator is required to manually perform the series of operations one by one, which may increase the operation time. Further, since the above-mentioned series of operations require the operator to carry out the operation by extending his/her hand to the vicinity of the cutting edge of the rotary cutter, the operation must be performed with great care. In addition to this, there is a risk that the spacer member inserted from the outside may be detached during the assembly work and the disassembly work of the rotary cutter group, and there is a risk that the work may be unstable.

Therefore, the structure of the mechanism 1 is more effective than the structure of the mechanism 2, and the occurrence of the various problems described above can be suppressed.

A mechanism 3, such as the cutting device of the

mechanism

1 or 2, including a plurality of sets of rotary blades, in which the 2 nd rotary blade is provided on one of the pair of rotary bodies, and the 2 nd rotary blade is offset to one side surface in the axial direction of the 1 st rotary blade;

the offset direction of the 2 nd rotary knife in at least one of the groups of rotary knife groups is different from the offset direction of the 2 nd rotary knife in other groups.

If the offset directions of the 2 nd rotary blades of all the multiple rotary blade groups (the 1 st and 2 nd rotary blades) of the mechanism 3 are the same, the assembly work and the disassembly work of the multiple rotary blade groups can be performed by moving the entire 2 nd rotary shaft in the axial direction.

On the other hand, the mechanism 1 is effective because the mechanism 3 cannot move the entire 2 nd rotation shaft in the axial direction. Further, according to the configuration of the mechanism 1, it is not necessary to provide a large mechanism for moving the entire rotary shaft, and therefore, the size increase of the apparatus can be suppressed.

And a mechanism 4, such as the cutting device of the

mechanism

1 or 2, wherein a flat cam surface is provided on the projecting direction side of the projection, and the flat cam surface is provided so as to be connected to the 2 nd direction side of the inclined cam surface and is orthogonal to the axial direction.

According to the mechanism 4, the flat cam surfaces are brought into contact with each other after the opening operation for expanding the gap between the pair of rotating bodies. Thus, the pair of rotating bodies can be maintained in the open state against the biasing force of the biasing mechanism without always applying a force for relatively rotationally displacing the pair of rotating bodies. As a result, the assembly operation and the disassembly operation of the rotary cutter group can be stably performed, and the workability can be improved.

A mechanism 5, such as the cutting device of the

mechanism

1 or 2, in which one of the pair of rotating bodies is attached so as not to be displaceable with respect to the 2 nd rotating shaft in the circumferential direction of the 2 nd rotating shaft, and the other rotating body is attached so as to be displaceable with respect to the 2 nd rotating shaft in the circumferential direction of the 2 nd rotating shaft;

when the 2 nd rotation shaft rotates and the one rotating body rotates in the 2 nd direction, the other rotating body can rotate following the one rotating body.

The term "driven" as used herein means that the rotating body is operated in the same direction by the action (power transmission) from the one rotating body, and the other rotating body is not directly acted on by the 2 nd rotating shaft as in the case of the other rotating body.

According to the above-described mechanism 5, even if the pair of rotating bodies are provided so as to be relatively rotatably displaceable, the rotating bodies can be driven to rotate in conjunction with the rotational driving of the 2 nd rotating shaft with a relatively simple configuration.

A cutting device as in the mechanism 5, wherein the projection has an end surface orthogonal to the 2 nd direction at an end portion on the 2 nd direction side;

when one of the pair of rotating bodies is relatively rotated and displaced in the 2 nd direction with respect to the other, an end surface of the protrusion provided on the one rotating body and an end surface of the protrusion provided on the other rotating body can be brought into contact with each other.

According to the mechanism 6, the structure of the mechanism 5 can be realized with a relatively simple structure, and the other rotating body can be driven more reliably by the one rotating body.

The mechanism 7 is a cutting device as the mechanism 5, and includes a regulating mechanism capable of regulating the rotational displacement of the other (driven) rotating body in the circumferential direction of the 2 nd rotating shaft.

According to the mechanism 7, since the rotational displacement of the driven rotary member is restricted, the pair of rotary members can be relatively rotationally displaced by rotating the 2 nd rotary shaft to rotationally displace one (driving) rotary member. That is, when a plurality of sets of the pair of rotating bodies are provided on the 2 nd rotating shaft, the opening and closing operations of the pair of rotating bodies can be performed simultaneously, and thus, the workability can be improved.

Mechanism 8. cutting device as in

mechanism

1 or 2, wherein the driving mechanism is a motor capable of rotating in forward and reverse directions.

According to the mechanism 8, for example, the one (driving side) rotating body can be rotated in the 2 nd direction by rotating the motor in the normal direction, and the one (driving side) rotating body can be rotated in the 1 st direction by rotating the motor in the reverse direction.

Thus, a common drive mechanism used in the work for cutting the workpiece can be used as a drive mechanism for relatively rotationally displacing the pair of rotary bodies. As a result, the structure can be simplified and the opening and closing operations of the pair of rotating bodies can be automated.

A blister packaging machine for manufacturing a blister package including a container film having a bag portion for accommodating an object to be contained and a cover film attached to the container film so as to seal the bag portion, the blister packaging machine comprising:

a bag forming mechanism for forming the bag in the container film while conveying the container film in a belt shape;

a filling mechanism for filling the object to be stored into the bag part;

an attachment mechanism for attaching the band-shaped coating film to: a container film in which the bag portion is filled with the contained object;

a scrap punching mechanism that punches a predetermined scrap (scrap) (end material) portion, which does not form the blister pack, from a strip-shaped blister film, which is formed by attaching the cover film to the container film; and

a blister pack cutting mechanism for cutting the blister pack from the blister film at a stage after the scrap portion is die-cut, and forming the blister pack as a product;

a cutting device of any one of the mechanisms 1 to 8 is provided as the blister pack cutting mechanism.

According to the above mechanism 9, the maintenance workability of the cutting device is improved, and the productivity of the blister packaging machine can be improved.

Drawings

Fig. 1 is a schematic view showing the overall configuration of the blister packaging machine.

Fig. 2 (a) shows a perspective view of the blister package and (b) shows a cross-sectional view of the blister package.

Fig. 3 is a plan view showing the blister film and the cutting device for cutting the blister film during conveyance.

Fig. 4 is a front view of the cutting device.

Fig. 5 shows an exploded perspective view of the upper blade assembly (set) and the like.

Fig. 6 shows a perspective view of a lock mechanism and the like.

Fig. 7 is a schematic diagram showing the arrangement and constitution of spacers (spacers).

Fig. 8 is an explanatory diagram illustrating an operation of the spacer.

Fig. 9 is an explanatory diagram illustrating an operation of the spacer.

Fig. 10 is an explanatory diagram illustrating an operation of the spacer.

Fig. 11 is an explanatory diagram illustrating an operation of the spacer.

Fig. 12 is a front view showing a closed state of a pair of opposed upper rotary knives.

Fig. 13 is a front view showing a state in which a pair of opposed upper rotary knives are opened and closed.

Fig. 14 is a front view showing a state in which a pair of opposed upper rotary knives are opened and closed.

Fig. 15 shows a front view of an opened state of a pair of opposed upper rotary knives.

FIG. 16 is a schematic diagram for explaining the structure of another embodiment.

Detailed Description

Hereinafter, an embodiment will be described with reference to the drawings. First, the structure of a blister pack manufactured by the blister packaging machine of the present embodiment will be described.

As shown in fig. 2 (a) and (b), a blister package 1 of the present embodiment includes: a container film 3 having a bag portion 2; a cover film 4 attached to the container film 3 in such a manner as to seal the bag portion 2.

One bag portion 2 accommodates one object 5 (see fig. 2 (b) and the like). Examples of the object 5 include electronic components, electronic devices, foods, medicines, and medical devices.

The container film 3 of the present embodiment is made of a thermoplastic resin material such as PVC (polyvinyl chloride). Further, a flange (flange) portion 3a is formed in the container film 3 so as to extend outward from the opening peripheral edge of the bag portion 2.

On the other hand, the coating film 4 is formed by laminating (plating) another kind of synthetic resin film on the aluminum vapor-deposited synthetic resin film, and is attached to the container film 3 (flange portion 3 a).

As will be described later, the blister package 1 of the present embodiment is manufactured by the following steps: a step of die-cutting the scraps 35a from a band-shaped blister film 35 (see fig. 3) formed by attaching the band-shaped container film 3 and the band-shaped cover film 4, and a step of cutting the blister pack 1 as a final product from the band-shaped blister film 35. In fig. 3, for convenience of explanation, a dotted pattern is added to a portion of the blister film 35.

As shown in fig. 3, the blister film 35 of the present embodiment is configured such that: five blister packs 1 are arranged in the film width direction (the vertical direction in fig. 3), and blister packs 1 in the film width direction (the right direction in fig. 3) are connected in series by the discard 35a, blister packs 1 in the film width direction are connected in series by the discard 35b, and both ends in the film width direction are connected in series by the discard 35c in the film conveyance direction.

Next, the structure of the blister packaging machine 10 for producing the blister package 1 will be described.

As shown in fig. 1, in the blister packaging machine 10, a band-shaped container film 3 drawn from a roll (roll) is intermittently conveyed downstream by a chain clip conveyor (chain clip conveyor)11 or the like as a conveying means. Here, the nip portion 11a (see fig. 4) of the chain clip type conveyor 11 grips both ends in the film width direction (the portion to become the scrap 35 c).

On the downstream side of the roll of the container film 3, a heating device 12 and a bag forming device 13 are first provided. The heating device 12 and the bag forming device 13 constitute a bag forming mechanism of the present embodiment.

The heating device 12 includes an upper die 12a and a lower die 12b disposed vertically across the container film 3, and is configured to be able to locally heat the formation range of the bag portion 2 of the container film 3.

The bag forming device 13 includes: an upper mold 13a having a plug (plug) (not shown) having a shape substantially similar to the shape of the bag part 2 and being small; and a lower die 13b having a forming recess (not shown) corresponding to the shape of the bag portion 2.

First, in a state where the container film 3 is heated by the heating device 12 and relatively softened, the upper die 13a and the lower die 13b are relatively moved in a direction to approach each other. Next, the plug protrudes from the upper die 13a, and the approximate shape of the bag portion 2 is formed. Finally, air (air) is blown from the upper die 13a to push the container film 3 against the forming concave portion of the lower die 13b, thereby forming the bag portion 2 at a predetermined position of the container film 3. The bag portion 2 is formed during a period (interval) between the transfer operations of the container film 3.

A filling device 14 as a filling means for filling the object 5 into the bag 2 is provided downstream of the bag forming device 13.

A1 st inspection device a1 as an inspection means is provided downstream of the filling device 14. The 1 st inspection device a1 is a known inspection device capable of inspecting, for example, whether or not the object 5 is contained in the bag 2, whether or not the bag 2 is defective, whether or not there is an abnormality in the object 5 and the container film 3, such as whether or not there is a joint (type) between the container film 3, and the like.

The 1 st inspection device a1 performs the above-described predetermined inspection for each individual blister package, determines whether or not the blister package 1 is good, and outputs the determination result to the defective product discharge mechanism 18 or the like via a control device described later.

On the other hand, the roll of the coating film 4 formed in a band shape is disposed so as to be wound in a roll shape separately from the container film 3. The coating film 4 pulled out from the roll is guided to a receiving roller (roll)15 provided on the downstream side of the 1 st inspection device a 1. The cover film 4 is laminated on the container film 3 so as to seal the bag portion 2 by being guided to the receiving roller 15.

A sealing (seal) device 16 as an attachment mechanism is provided on the downstream side of the receiving roller 15. The sealing device 16 includes: an upper mold 16a, the bottom surface of which is heated to a predetermined sealing temperature; and a lower mold 16b in which a concave portion (not shown) corresponding to the bag portion 2 is formed; both dies 16a and 16b are configured to be movable up and down and capable of pressure-bonding.

The container film 3 and the coating film 4 are fed between the upper die 16a and the lower die 16b, and the two

films

3 and 4 are pressed against each other by the two dies 16a and 16b, whereby the coating film 4 is adhered to the flange portion 3a of the container film 3. Thereby, a strip-shaped blister film 35 is produced in which the bag portion 2 filled with the stored material 5 is sealed with the film 4.

A2 nd inspection device a2 as an inspection means is provided downstream of the sealing device 16. The 2 nd inspection device a2 is a known inspection device capable of inspecting, for example, defects in the coating 4 such as defective sealing and the presence or absence of a joint (bonding tape) in the coating 4.

The 2 nd inspection device a2 performs the above-described predetermined inspection for each individual blister package, determines whether or not the blister package 1 is good, and outputs the determination result to the defective product discharge mechanism 18 or the like via a control device described later.

A scrap cutting device 17 as a scrap cutting mechanism for cutting the scrap 35a from the blister film 35 is provided downstream of the 2 nd inspection device a 2.

The scrap blanking device 17 includes: a punch (punch)17a for punching the aforementioned scrap 35a from the blister film 35; a die (die)17b having a die hole into which the punch 17a is inserted; and a scrap hopper (hopper)17c provided below the die 17b for storing the punched scrap 35 a. The punch 17a and the die 17b are configured to be movable up and down by a drive mechanism not shown.

A defective discharge mechanism 18 as a defective discharge mechanism is provided downstream of the scrap punching apparatus 17. The defective discharge mechanism 18 is a mechanism for removing a defective portion including the blister package 1 determined to be defective from the blister film 35 when the 1 st inspection device a1 or the 2 nd inspection device a2 makes a defect determination.

The defective product discharge mechanism 18 includes: a pair of cutters (cutters) 18a in the film width direction for cutting off the defective portions from the blister film 35; and a reject hopper 18b for storing the rejected portions cut from the blister film 35.

The pair of cutting blades 18a are configured to be movable up and down between a lower position (cutting position) at which the blister film 35 can be cut and an upper position (retracted position) away from the blister film 35 by a drive mechanism (not shown).

A cutting device (slitter) 19 as a blister package cutting mechanism for cutting the blister package 1 and the discard 35b from the blister film 35 is provided downstream of the reject discharge mechanism 18.

The cutting device 19 of the present embodiment cuts the boundary 35d (see fig. 3) between the blister package 1 and the

scraps

35b and 35c in the film conveyance direction as the blister film 35 is conveyed. The cutting device 19 will be described in detail later.

A conveyor 21 is provided at a position where each blister pack 1 belonging to a non-defective product cut out from the blister film 35 falls. The qualified blister pack 1 is transferred to the finished product hopper 22 by the conveyor 21 and temporarily stored therein. A scrap hopper 23 for storing the scrap 35b is provided at a position where the scrap 35b cut out from the blister film 35 falls.

A cutting device 25 for cutting the waste material 35c left over by cutting the blister package 1 and the like is disposed downstream of the cutting device 19. The discard 35c is cut into a predetermined size by the cutting device 25 and stored in the discard hopper 27.

Although not shown, the blister packaging machine 10 is provided with a film joining device, a control device, and the like in addition to the various devices described above.

The film joining apparatus is provided at a position where a roll of the container film 3 and the coating film 4 wound in a roll shape is provided. The film joining apparatus has a function of continuously supplying the

films

3, 4 by adhering a joining tape so as to straddle the trailing end portions of the

films

3, 4 being supplied and the leading end portions of the

new films

3, 4 supplied from the next roll to join the two

films

3, 4. The portion of the

film

3, 4 where the bonding tape is adhered as described above is a defective portion, and is a target to be discharged by the defective discharge mechanism 18.

The control device comprises the following components: a CPU (Central Processing Unit) as an operation means, a ROM (Read Only Memory) for storing various programs (programs), a RAM (Random Access Memory) for temporarily storing various data (data), a touch panel (touch panel) constituting a display means and an operation means, and various operation buttons (buttons), and the control device has a function of outputting control signals to various means in the blister packaging machine 10 such as the cutting device 19 to control these means.

The operation buttons include, for example, a "start" button for starting the blister packaging machine 10, a "stop" button for stopping the operation of the blister packaging machine 10, and the like. Further, the operator can switch the operation mode of the blister packaging machine 10 between the "production mode (mode)" and the "inspection mode" by operating the touch panel.

Next, the cutting device 19, which is a characteristic part of the present invention, will be described in detail with reference to the drawings. As shown in fig. 4, the cutting device 19 includes: a lower blade mechanism 51 and an upper blade mechanism 52 which are disposed vertically across a conveyance path (hereinafter referred to as "film conveyance path") of the blister film 35; a drive motor 53 as a drive mechanism for driving the lower blade mechanism 51 and the upper blade mechanism 52; and a control box (box)54 for controlling various controls related to the cutting device 19, such as the drive control of the drive motor 53. Fig. 4 is a front view of the cutting device 19 viewed in the film conveying direction as the depth direction of the paper.

First, the lower blade mechanism 51 disposed below the film transport path will be described. The lower blade mechanism 51 is fixed to a base (base) portion (not shown), and the lower blade mechanism 51 includes: a pair of side walls 61 provided on both sides of the film conveying path; a lower rotation shaft 62 as a1 st rotation shaft is horizontally disposed between the both side wall portions 61 along the film width direction (the left-right direction in fig. 4).

The lower rotating shaft 62 is rotatably supported by the two side wall portions 61 through a bearing (not shown). A gear 64 as a drive transmission mechanism is attached and fixed to a protruding portion of the lower rotary shaft 62 that protrudes outward from one of the side wall portions 61. Further, the protruding portion is connected to the driving motor 53. Thereby, the lower rotary shaft 62 can be rotationally driven.

The drive motor 53 is configured to be capable of forward and reverse rotation, and by rotating the drive motor 53 in one direction (forward rotation), the lower rotation shaft 62 can be rotated in the clockwise direction on the sheet of fig. 1 (forward rotation), and by rotating the drive motor 53 in the other direction (reverse rotation), the lower rotation shaft 62 can be rotated in the counterclockwise direction on the sheet of fig. 1 (reverse rotation).

Lower blade units (sets) 65 are attached to the lower rotary shaft 62 at a plurality of positions in the axial direction (the left-right direction in fig. 4). The lower blade unit 65 is composed of a disk-shaped lower rotary blade (round cutter) 66 as the 1 st rotary blade and a lower blade holder (holder)67 for attaching and fixing the lower rotary blade 66 to the lower rotary shaft 62.

The lower blade holder 67 holds the lower rotary blade 66 integrally with itself (so as not to be relatively displaced), and is fixedly attached to the lower rotary shaft 62 so as not to be relatively displaced in the axial direction and the circumferential direction of the lower rotary shaft 62. Thereby, the lower blade assembly 65 (lower rotary blade 66) can be rotated integrally with the lower rotary shaft 62.

In the present embodiment, the lower blade assembly 65 is attached to six positions in the axial direction corresponding to the positions of the

scraps

35b and 35c (see fig. 3 and 4). Among them, the lower

rotary knives

66a, 66f of the two lower knife assemblies 65 provided corresponding to the scraps 35c positioned at both ends in the film width direction are configured in a single knife structure having a knife portion only on one side corresponding to the boundary 35d between the scraps 35c and the blister pack 1 among both side surfaces of the peripheral edge portion of the lower rotary knife.

In contrast, the lower rotary blades 66b to 66e of the four lower blade units 65 provided in correspondence with the discard 35b are configured in a double blade structure in which the width (thickness) of the lower rotary blade is set to be the same as the width of the discard 35b and the blade portions are provided on both side surfaces of the peripheral edge portion corresponding to the discard 35b and the boundary lines 35d of the two blister packs 1 located on both sides of the discard 35 b.

Next, the upper blade mechanism 52 disposed above the film transport path will be described. The upper blade mechanism 52 is unitized to be detachably attached to the lower blade mechanism 51, and is configured to be almost entirely surrounded by a not-shown housing.

More specifically, the upper blade mechanism 52 includes: a pair of side walls 71 provided as a part of the housing on both sides of the film conveying path; an upper rotating shaft 72 as a2 nd rotating shaft is horizontally disposed between the both side wall portions 71 along the film width direction.

In the assembled state of the lower blade mechanism 51 and the upper blade mechanism 52, the side wall portions 71 of the upper blade mechanism 52 are placed on the side wall portions 61 of the corresponding lower blade mechanism 51, and are fixed by a fixing mechanism not shown so as not to fall off.

The upper rotating shaft 72 is rotatably supported by the side wall portions 71 via bearings (not shown). A gear 74 serving as a drive transmission mechanism is attached and fixed to a protruding portion of the upper rotating shaft 72 that protrudes outward from one of the side wall portions 71.

The gear 74 meshes with the gear 64 of the lower blade mechanism portion 51. Thus, the lower rotating shaft 62 of the lower blade mechanism 51 and the upper rotating shaft 72 of the upper blade mechanism 52 can be driven to rotate in opposite directions in synchronization with each other through the film conveying path.

That is, by rotating the drive motor 53 in the normal direction, the lower rotating shaft 62 is rotated in the clockwise direction (normal direction) on the sheet of fig. 1, and the upper rotating shaft 72 is rotated in the counterclockwise direction (normal direction) on the sheet of fig. 1. On the other hand, by reversing the drive motor 53, the lower rotation shaft 62 is rotated (reversed) in the counterclockwise direction on the sheet of fig. 1 and the upper rotation shaft 72 is rotated (reversed) in the clockwise direction on the sheet of fig. 1.

The upper rotary shaft 72 is provided with upper blade units 75 at a plurality of positions in the axial direction thereof. As shown in fig. 5, the upper blade unit 75 includes: an upper rotary blade (circular cutter) 76 having a disk shape as a2 nd rotary blade (rotary body); an upper blade holder 77 for mounting the upper rotary blade 76 to the upper rotary shaft 72; a retaining ring 78 for fixing the upper rotary cutter 76 to the upper cutter holder 77; a coil spring (coil spring)79 as a biasing mechanism for biasing the upper blade holder 77 (upper rotary blade 76) in a predetermined direction; a stopper (stopper)80 supporting the coil spring 79; a spacer (spacer)81 attached to a surface of the upper rotary blade 76 on the offset direction side (hereinafter referred to as "axial direction inside"); and an annular ring member 82 attached to a surface of the upper rotary cutter 76 on the side opposite to the offset direction (hereinafter referred to as "axially outer side").

The structure of the upper blade unit 75 will be described in more detail below. The upper blade holder 77 includes: a cylindrical boss (boss) portion 77a through which the upper rotating shaft 72 can be inserted; the flange portion 77b projects radially outward from the boss portion 77 a.

On the other hand, a through hole (not shown) having an inner diameter substantially equal to the outer diameter of the boss portion 77a is formed in the center portion of the upper rotary blade 76. An annular recess 76m having a diameter larger than that of the holding ring 78 is formed around the through hole on the axially inner surface of the upper rotating blade 76.

In addition, in a state described below, one end side of the boss portion 77a of the upper blade holder 77 is inserted into the through hole from the outside in the axial direction of the upper rotary blade 76, and the flange portion 77b of the upper blade holder 77 abuts against the outside surface in the axial direction of the upper rotary blade 76. On the other hand, a retaining ring 78 is fitted to one end side of the boss portion 77b of the upper blade holder 77 projecting from the through hole on the axially inner side of the upper rotary blade 76.

Further, a plurality of screw holes (not shown) are formed in the annular recess 76m of the upper rotary cutter 76, the flange portion 77b of the upper cutter holder 77, and the retaining ring 78 so as to correspond to each other. The grub screws 83 are screwed into the screw holes from the inside in the axial direction of the upper rotary cutter 76 in a state where the screw holes are aligned.

As a result, the upper rotary cutter 76 is sandwiched between the flange portion 77b and the retaining ring 78, and the upper cutter holder 77 holds the upper rotary cutter 76 integrally with itself (cannot be displaced relatively). The upper blade holder 77 (upper rotary blade 76) is slidably attached to the upper rotary shaft 72 in the axial direction of the upper rotary shaft 72.

The coil spring 79 is fitted around the upper rotary shaft 72 such that one end thereof is fitted into an outer peripheral portion of a boss portion 77b of the upper blade holder 77 located on the axially outer side of the upper rotary blade 76.

The stopper 80 is formed in an annular shape through which the upper rotating shaft 72 can be inserted, and is attached and fixed to the upper rotating shaft 72 at the other end side of the coil spring 79. Further, screw holes (not shown) are formed in the stopper 80 and the upper rotating shaft 72 along the radial direction of the stopper 80 and the upper rotating shaft 72, respectively, in a corresponding manner. In addition, the lock screw 84 is screwed into each screw hole in a state where the screw holes are aligned. Thus, the stopper 80 is fixedly attached so that the upper rotating shaft 72 cannot be displaced in the axial direction and the circumferential direction of the upper rotating shaft 72.

A circular projection 80a having a smaller diameter than the main body of the stopper 80 is formed on the support surface of the stopper 80 that supports the other end of the coil spring 79. The other end of the coil spring 79 is fitted into the outer peripheral portion of the circular projection 80 a.

The ring member 82 has an inner diameter substantially equal to the outer diameter of the flange portion 77b of the upper blade holder 77, and is attached to the axially outer surface of the upper rotary blade 76 so as to fit into the outer peripheral portion of the flange portion 77 b.

Further, on the axially inner side surface of the upper rotary blade 76, a retaining ring 78 is attached to the annular recess 76m, and thereby an annular groove portion 76n is formed between the outer peripheral edge portion of the annular recess 76m and the outer peripheral edge portion of the retaining ring 78. Two spacers 81 are attached and fixed to the annular groove portion 76 n.

Each spacer 81 is formed in an arc shape along the circumferential direction of the annular groove portion 76n (the rotation direction of the upper rotary blade 76), and is formed so that the width thereof in the radial direction of the upper rotary blade 76 is substantially the same as the width of the annular groove portion 76 n. Thus, the spacers 81 are fitted into the annular grooves 76 n.

Each spacer 81 has a screw hole 81 a. A pair of screw holes (not shown) are formed in the upper rotary blade 76 (annular groove 76n) and the ring member 82, respectively, corresponding to the screw holes 81 a. The grub screw 85 is screwed from the outside in the axial direction of the ring member 82 in a state where these screw holes are aligned with the screw holes 81a of the spacer 81. Thus, the spacer 81 and the ring member 82 are fixedly attached to the upper rotary blade 76 so as not to be displaced.

The structure of the spacer 81 will be described in detail below. Fig. 7 is a schematic view showing the arrangement and structure of the spacer 81 on the inner surface in the axial direction of the upper rotary cutter 76. In fig. 7, a dotted pattern is added to the spacer 81 for the sake of convenience of explanation.

The length of the arc from one end portion to the other end portion of the spacer 81 has a length corresponding to a range of the rotation angle of the upper rotary cutter 76 of about 85 °. The two spacers 81 are arranged at equal angular intervals, i.e., at 180 ° intervals, in the circumferential direction of the annular groove portion 76n (the rotation direction of the upper rotary knife 76).

The axially inner surface (surface on the viewer's side in fig. 7) of the spacer 81 protrudes axially inward from the axially inner surface of the upper rotary blade 76 (see fig. 15 and the like). A cam surface (cam)90 is formed on the axially inner side surface of the spacer 81. Therefore, the spacer 81 constitutes the projection (cam portion) of the present embodiment.

The cam surface 90 is constituted by an inclined cam surface 90a formed in a predetermined longitudinal section including one end portion in the longitudinal direction of the spacer 81 (the end portion on the clockwise direction side of the sheet surface in fig. 7) and a flat cam surface 90b formed in a predetermined longitudinal section including the other end portion in the longitudinal direction of the spacer 81 (the end portion on the counterclockwise direction side of the sheet surface in fig. 7).

The inclined cam surface 90a has a length corresponding to a range of the rotation angle of the upper rotary blade 76 of about 70 °. The inclined cam surface 90a is inclined such that the amount of projection thereof to the inside in the axial direction increases from one end portion to the other end portion in the longitudinal direction of the spacer 81 (see fig. 15 and the like). The inclined cam face 90a is inclined by about 10 ° with respect to the axially inner side face of the upper rotary knife 76 (the radial direction of the upper rotary shaft 72).

On the other hand, the flat cam surface 90b has a length corresponding to a range of the rotation angle of the upper rotary blade 76 of about 15 °. The flat cam surface 90b is formed as a plane parallel to the axial inner surface of the upper rotary blade 76(a plane orthogonal to the axial direction of the upper rotary shaft 72).

An engagement end surface 91 is formed at the other end portion of the spacer 81 in the longitudinal direction so that the flat cam surface 90b and the annular groove portion 76n are stepped (see fig. 5 and the like). The engagement end surface 91 is formed as a plane orthogonal to the rotation direction of the upper rotary cutter 76.

In the present embodiment, the upper blade unit 75 configured as described above is mounted at ten positions (see fig. 3 and 4) in the axial direction of the upper rotating shaft 72 corresponding to the positions of the

scraps

35b and 35 c.

The upper rotary knives 76b to 76i of the eight upper knife assemblies 75 provided corresponding to the waste 35b and the boundary 35d of the blister pack 1 are disposed so that the inner surfaces in the axial direction thereof face the waste 35 b.

That is, two adjacent upper rotary knives 76 (for example, the upper rotary knife 76b and the upper rotary knife 76c) are disposed so that the axially inner side surfaces thereof face each other at positions corresponding to the respective scraps 35 b. The two opposing upper rotary knives 76 are paired and configured to be capable of performing opening and closing operations, etc., described later.

The upper rotary knives 76a and 76j of the two upper knife units 75 provided corresponding to the waste 35c positioned at both ends in the film width direction and the boundary 35d of the blister pack 1 are disposed so that the inner side surfaces in the axial direction face the waste 35c side, respectively.

In addition, although the two upper blade units 75 (the upper rotary blades 76a and 76j) corresponding to the scrap 35c do not have the upper blade units 75 forming a pair like the upper blade units 75 (the upper rotary blades 76b to 76i) corresponding to the scrap 35b, the supporting unit 100 forming a set thereof is provided instead.

The holder assembly 100 is attached to the upper rotary shaft 72 between the upper blade assembly 75 (the upper rotary blades 76a and 76j) corresponding to the scrap 35c and each of the side wall portions 71. The support unit 100 has the same configuration as the upper blade unit 75, and is different from the upper blade unit 75 only in that it has a disk body 101 having a slightly smaller diameter than the upper rotary blade 76 and taking the form of a rotary body having no blade portion instead of the upper rotary blade 76. Therefore, the same component names and the same reference numerals are used for the parts overlapping with those of the upper blade unit 75, and detailed description of the supporting unit 100 will be omitted.

In the case of the pair of opposed upper rotary blades 76, the opposed upper rotary blades 76 (upper rotary blades 76a and 76j) and the disk bodies 101 (

disk bodies

101a and 101b) are configured to be paired and configured to be capable of performing opening and closing operations and the like described below.

Then, one of the pair of opposing upper rotating blades 76 and the like (including the case of the opposing upper rotating blade 76 and the disc body 101, the same applies hereinafter) is mounted so as not to be displaceable in the circumferential direction of the upper rotating shaft 72. That is, the upper rotating shaft 72 is provided so as to be rotatable integrally with the upper rotating shaft 72 in accordance with the rotational driving of the upper rotating shaft 72.

Hereinafter, the upper rotary cutter 76 and the like on one side (including the case of the disk body 101, the same shall apply hereinafter) will be referred to as "drive-side" upper rotary cutter 76 and the like as appropriate. In the present embodiment, the upper rotary blade 76 and the like (the disk body 101a, the upper rotary blade 76b, the upper rotary blade 76d, the upper rotary blade 76f, the upper rotary blade 76h, and the upper rotary blade 76j) positioned on the left side in fig. 4 serve as the upper rotary blade 76 and the like on the drive side.

Here, a mounting structure of the upper rotary blade 76 and the like on the driving side to the upper rotary shaft 72 will be described in detail. As shown in fig. 5, a key groove 72a extending in the axial direction is formed in the outer peripheral surface of the upper rotating shaft 72. Corresponding to the key groove 72a, a key 77c that protrudes radially inward and is formed in the axial direction of the upper rotating shaft 72 is provided on the inner peripheral surface of a boss portion 77a of the upper blade holder 77 that holds the upper rotating blade 76 on the driving side and the like. The upper blade holder 77 is attached to the upper rotating shaft 72 in a state where the key 77c is fitted in the key groove 72 a. Thus, the upper rotary blade 76 on the drive side is mounted so as to be displaceable in the axial direction of the upper rotary shaft 72 but not in the circumferential direction of the upper rotary shaft 72.

On the other hand, the other of the pair of opposed upper rotary knives 76 is attached so as to be displaceable in the circumferential direction of the upper rotary shaft 72. The other side upper rotary cutter 76 and the like are provided so as to be rotatable following the drive side upper rotary cutter 76 and the like as described later.

Hereinafter, the other side upper rotary cutter 76 and the like are referred to as "driven side upper rotary cutter 76 and the like as appropriate. In the present embodiment, the upper rotary blade 76 and the like (the upper rotary blade 76a, the upper rotary blade 76c, the upper rotary blade 76e, the upper rotary blade 76g, the upper rotary blade 76i, and the disk body 101b) on the right side in fig. 4 are the upper rotary blade 76 and the like on the driven side.

Next, the relative relationship and interaction between the pair of opposed upper rotary knives 76 and the like will be described. The two spacers 81 provided on the inner surface in the axial direction of the upper rotary cutter 76 and the like on the driving side and the two spacers 81 provided on the inner surface in the axial direction of the upper rotary cutter 76 and the like on the driven side are brought into a closed state in which the inner surface in the axial direction of the upper rotary cutter 76 and the like on the driving side and the inner surface in the axial direction of the upper rotary cutter 76 and the like on the driven side are closest to each other by the biasing force of the coil spring 79 in a state where they do not interfere with each other in the axial direction and the circumferential direction of the upper rotary cutter 72 and are alternately arranged at intervals of.

In this closed state, the flat cam surface 90b, which is the axially inner end of the spacer 81 such as the driving-side upper rotary cutter 76, is in a state of entering the annular groove 76n such as the driven-side upper rotary cutter 76, and the flat cam surface 90b, which is the axially inner end of the spacer 81 such as the driven-side upper rotary cutter 76, is in a state of entering the annular groove 76n such as the driving-side upper rotary cutter 76 (see fig. 12 and the like). In fig. 12, for the sake of convenience of explanation, a dotted pattern is added to the spacer 81 (the same applies to fig. 13 to 15).

The distance W1 between the driving upper rotary cutter 76 and the driven upper rotary cutter 76 in the closed state is set to be narrower than the thickness W2 of the lower rotary cutter 66. Therefore, when the pair of upper rotary knives 76 and the like are closed in the assembled state of the lower knife assembly 65 and the upper knife assembly 75, the axial inner side surfaces of the peripheral portions of the respective upper rotary knives 76 are pushed against the peripheral portion side surfaces of the corresponding lower rotary knives 66 (see fig. 12). That is, at the position corresponding to each scrap 35b, the pair of opposed upper rotary blades 76 (for example, the upper rotary blade 76b and the upper rotary blade 76c) are in a state of sandwiching the lower rotary blade 66 (for example, the lower rotary blade 66b) corresponding to the pair of upper rotary blades 76 from both sides in the axial direction.

In the closed state, for example, when the driving-side upper rotary cutter 76 and the driven-side upper rotary cutter 76 are relatively rotationally displaced by rotating the driving-side upper rotary cutter 76 and the like in the clockwise direction when viewed from the outside in the axial direction while restricting the rotational displacement of the driven-side upper rotary cutter 76 and the like, as shown in fig. 8, the engagement end surfaces 91 of the driving-side two spacers 81 come into contact with the engagement end surfaces 91 of the driven-side two spacers 81, respectively. Therefore, the clockwise direction when the driving side upper rotary blade 76 and the driven side upper rotary blade 76 are viewed from the outside in the axial direction corresponds to the 2 nd direction in the present embodiment.

In fig. 8, for the sake of convenience of explanation, the upper rotary blade 76 on the driving side (near the observer) is referred to as "upper rotary blade 76 (a)", and the upper rotary blade 76 on the driven side (far from the observer) is referred to as "upper rotary blade 76 (B)". Similarly, the two spacers 81 on the driving side are referred to as "spacer 81(a 1)" and "spacer 81(a 2)", and the two spacers 81 on the driven side are referred to as "spacer 81 (B1)" and "spacer 81 (B2)" (the same applies to fig. 9 to 11). In fig. 8, for the sake of convenience of explanation, a dotted pattern (the same applies to fig. 9 to 11) is added to the cam surface 90 (the inclined cam surface 90a and the flat cam surface 90 b).

In the closed state shown in fig. 8, when the driving motor 53 is driven to rotate the driving-side upper rotary cutter 76 and the like forward integrally with the upper rotary shaft 72, the engaging end surfaces 91 of the driving-side two spacers 81 press the engaging end surfaces 91 of the driven-side two spacers 81, respectively, and rotational force rotating in the same direction is transmitted from the driving-side upper rotary cutter 76 and the like to the driven-side upper rotary cutter 76 and the like. That is, the driven upper rotary cutter 76 and the like rotate in the forward direction in response to the driving upper rotary cutter 76 and the like, and both rotate integrally. Thus, in the assembled state of the lower blade unit 65 and the upper blade unit 75, the lower rotary blade 66 and the upper rotary blade 76 are rotated in the respective opposite directions in synchronization with each other, and the blister film 35 can be cut in the conveying direction (see fig. 12).

On the other hand, from the closed state shown in fig. 8, for example, when the driving side upper rotary cutter 76 and the driven side upper rotary cutter 76 are relatively rotationally displaced with respect to each other by rotating the driving side upper rotary cutter 76 and the like in the counterclockwise direction when viewed from the outside in the axial direction while restricting the rotational displacement of the driven side upper rotary cutter 76 and the like, as shown in fig. 9 and 10, the engagement end surfaces 91 of the driving side two spacers 81 are respectively further away from the engagement end surfaces 91 of the driven side two spacers 81, and the inclined cam surfaces 90a of the driving side two spacers 81 are respectively further close to the inclined cam surfaces 90a of the corresponding driven side two spacers 81. Therefore, the counterclockwise direction when viewing the driving side upper rotary blade 76 and the like or the driven side upper rotary blade 76 and the like from the outside in the axial direction corresponds to the 1 st direction in the present embodiment.

When the driving-side upper rotary blade 76 and the like are further rotationally displaced, as shown in fig. 11 and 13, the inclined cam surfaces 90a of the driving-side two spacers 81 respectively contact the inclined cam surfaces 90a of the corresponding driven-side two spacers 81. In the present embodiment, when the upper rotary blade 76 on the driving side and the like are rotated by about 80 ° from the closed state shown in fig. 8, both inclined cam surfaces 90a come into contact with each other.

When the driving-side upper rotary cutter 76 and the like are further rotationally displaced, as shown in fig. 14, the inclined cam surfaces 90a of the driving-side two spacers 81 slide on the inclined cam surfaces 90a of the corresponding driven-side two spacers 81, respectively, and the driving-side two spacers 81 and the driven-side two spacers 81 are rotationally displaced with respect to each other. At the same time, the two driving-side spacers 81 and the two driven-side spacers 81 are also displaced outward in the axial direction against the biasing force of the coil springs 79, respectively. Thereby, the interval W1 between the driving side upper rotary cutter 76 and the driven side upper rotary cutter 76 is gradually widened.

Next, as shown in fig. 15, when the flat cam surfaces 90b of the two spacers 81 on the driving side and the flat cam surfaces 90b of the two spacers 81 on the driven side are in contact with each other, the distance W1 between the inner surface in the axial direction of the upper rotary knife 76 on the driving side and the inner surface in the axial direction of the upper rotary knife 76 on the driven side is maximized, and the spacers are in an open state. In the present embodiment, the entire surfaces of the two flat cam surfaces 90b are brought into contact with each other by rotating the driving-side upper rotary blade 76 or the like by about 165 ° from the closed state shown in fig. 8.

In the open state, since the flat cam surfaces 90b are in contact with each other, the open state can be stably maintained against the biasing force of the coil spring 79 in the axial direction unless the driving-side upper rotary cutter 76 or the like and the driven-side upper rotary cutter 76 or the like are rotationally displaced relative to each other.

Further, by reversing the sequence of the actuation operations, the pair of opposed upper rotary blades 76 and the like can be closed to be brought into the closed state.

Then, the upper blade mechanism 52 is provided with a lock mechanism 110 (see fig. 4 and 6) as a restricting mechanism for restricting the operation of the driven-side upper rotary blade 76 and the like. The lock mechanism 110 is configured to be able to restrict the circumferential rotational displacement of the upper rotary blade 76 and the like on the driven side toward the upper rotary shaft 72 when the upper blade mechanism 52 is separated from the lower blade mechanism 51 (when the assembled state of the lower rotary blade 66 and the upper rotary blade 76 is released) during maintenance or the like. The following description will be made in detail.

The lock mechanism 110 includes: a linking shaft 111 provided between the pair of side wall portions 71 so as to be parallel to the upper rotating shaft 72; and arm (arm) portions 112 provided at a plurality of positions in the longitudinal direction of the interlocking shaft 111 so as to correspond to the driven-side upper rotary blade 76 and the like.

The interlinking shaft 111 is rotatably supported by the side wall portions 71 via bearings (not shown). The plurality of arm portions 112 can be tilted by the rotation of the interlocking shaft 111.

A drive lever (lever)113 as a drive transmission mechanism is attached and fixed to a protruding portion of the interlocking shaft 111 that protrudes outward from one of the side wall portions 71. A rod-shaped body 114 is formed to protrude from the drive lever 113, and one end of a coil spring 115 is hooked to the rod-shaped body 114.

The other end of the coil spring 115 hooks a rod-shaped body 116 formed to protrude from the side wall portion 71. Therefore, the free end side of the drive lever 113 is pulled downward by the tensile force of the coil spring 115.

In response to this, an air cylinder (air cylinder)118 is provided in the side wall portion 61 of the lower blade mechanism portion 51 located below the drive rod 113 via an installation stand 117. A rod (rod)119 provided to be movable up and down in the cylinder 118 protrudes upward.

In the assembled state of the lower blade mechanism 51 and the upper blade mechanism 52 (the state in which the side wall portion 71 of the upper blade mechanism 52 is placed on the side wall portion 61 of the lower blade mechanism 51), the distal end portion of the rod 119 is in contact with the bottom surface of the free end side of the drive lever 113.

In this state, the lever 119 moves up and down, and the linking shaft 111 is rotated by the driving lever 113, so that the arm portions 112 are inclined around the linking shaft 111.

A hook-shaped engaging portion 112a bent downward is provided at the tip of the arm portion 112. A catch recess 82a is formed in the outer peripheral portion of the ring member 82 to which the driven-side upper rotary cutter 76 and the like are attached, corresponding to the catch portion 112 a.

Normally, the lever 119 is stopped at the most raised position. In this state, the arm portion 112 (the hooking portion 112a) is separated from the ring member 82. Thereby, the driven upper rotary blade 76 and the like can be displaced in the circumferential direction of the upper rotary shaft 72. That is, the driven upper rotary cutter 76 and the like can be rotated by being driven by the driving upper rotary cutter 76 and the like.

In a state where the catch recess 82a is positioned at the uppermost portion of the ring member 82 (see fig. 6), the arm portion 112 is inclined downward, and the catch portion 112a is inserted into the catch recess 82a (see fig. 5). When the engaging portion 112a of the arm portion 112 is inserted into the engaging recess 82a of the ring member 82 as described above, the driven-side upper rotary blade 76 and the like are engaged with each other and cannot be displaced in the circumferential direction of the upper rotary shaft 72.

A key groove 111a extending in the axial direction is formed in the outer peripheral surface of the interlocking shaft 111, and the arm portion 112 is formed in a state displaceable in the axial direction of the interlocking shaft 111 along the key groove 111 a. This prevents the operation of the driven-side upper rotary cutter 76 from being hindered when the driven-side upper rotary cutter 76 and the like are displaced in the axial direction of the upper rotary shaft 72.

The procedure and the operation and effects of the blister package 1 manufactured by the blister packaging machine 10 configured as described above will be described, and specifically, the main steps after the blister film 35 is formed by filling and sealing the contents 5 in the pocket 2 will be mainly described.

The blister film 35 formed through the bag portion forming step of forming the bag portion 2, the filling step of filling the accommodated object 5 into the bag portion 2, the mounting step of mounting the cover film 4 to the container film 3, and the like is transferred to the scrap cutting step (scrap cutting device 17).

In the scrap punch device 17, when the blister film 35 is conveyed, the punch 17a is located at a standby position separated from the blister film 35 to the upper side, and the die 17b is located at a standby position separated from the blister film 35 to the lower side.

When the intermittently conveyed blister film 35 stops at a predetermined position, the punch 17a descends, and the die 17b ascends. Then, when the punch 17a further lowers, the punch pushes the blister film 35 into the punch hole of the die 17b, and the scrap 35a is punched out of the blister film 35. Then, the punch 17a and the die 17b are separated from the blister film 35, thereby ending the punching step of the discard 35 a. Thus, as shown in fig. 3, the scraps 35a are punched out one at a time in sequence.

In a normal case where the blister film 35 has no defective portion, the defective product discharge mechanism 18 is not operated, and the blister film 35 with the punched scrap 35a passes through the defective product discharge mechanism 18 as it is and is transferred to the cutting device 19.

On the other hand, when the result of the failure determination of the predetermined blister package 1 is inputted from the 1 st inspection device a1 or the 2 nd inspection device a2 to the defective product discharge mechanism 18, the pair of cutting blades 18a are lowered in the defective product discharge mechanism 18, and the tip of the cutting blade 18a is inserted into a hole portion formed by punching the waste material 35a (a hole portion formed by punching the waste material 35a between the blister package 1 determined as a non-defective product and the blister package 1 determined as a defective product).

Subsequently, the blister film 35 is cut in the film conveyance direction in accordance with the conveyance operation of the blister film 35. In the present embodiment, the blister pack 1 is cut along the boundary 35d between the waste material 35c and the blister pack.

The defective product discharge mechanism 18 holds the cutter 18a at the lowered cutting position until the next portion to be conveyed is a portion determined as a defective product, that is, the portion determined as a defective product is left, and holds the cutter 18a at the lowered cutting position. When the hole formed by punching the scrap 35a between the blister package 1 determined as a defective product and the blister package 1 determined as a non-defective product is transferred to the position of the cutting blade 18a, the cutting process is terminated and the cutting blade 18a is moved to the upper retracted position. Then, the blister film 35 cut out of the defective portion is transferred to the cutting device 19.

In the cutting device 19, the boundary 35d between the blister package 1 and the

scraps

35b and 35c is cut in the film conveying direction. Thereby, the blister package 1 is cut from the blister film 35, completing the manufacture of the blister package 1.

Next, a procedure and operational effects when performing maintenance work of the cutting device 19, which are characteristic parts of the present invention, will be described, specifically, the operation of the knife mechanism 52 will be mainly described.

First, the operator operates the control device (touch panel) of the blister packaging machine 10 to switch the operation mode of the blister packaging machine 10 from the "production mode" to the "inspection mode". When the inspection mode is switched, various mechanisms in the blister packaging machine 10 are put into a rest state, and the cutting device 19 is in a state in which the opening and closing operations of the pair of opposed upper rotary knives 76 and the like can be performed.

Next, the operator presses an "on" button (not shown) provided in the control box 54 of the cutting device 19. Thereby, the drive motor 53 is driven in the normal direction, and the drive-side upper rotary blade 76 and the driven-side upper rotary blade 76 are driven in the normal direction by a predetermined amount. In addition, when the catch recess 82a of the ring member 82 such as the upper rotary cutter 76 on the driven side is positioned at the uppermost portion (see fig. 6), the drive motor 53 is stopped.

Subsequently, the cylinder 118 is driven to lower the rod 119. Thereby, the arm portion 112 of the lock mechanism 110 is inclined downward, and the engaging portion 112a is inserted into the engaging recess 82a (see fig. 5). Thereby, the driven-side upper rotary blade 76 and the like are engaged and cannot be displaced in the circumferential direction of the upper rotary shaft 72.

In this state, the "on" button of the control box 54 is pressed again. In this way, the drive motor 53 is driven in reverse, and the upper rotary blade 76 and the like on the drive side are driven in reverse by a predetermined amount. Thereby, the opening operation of the pair of opposed upper rotary knives 76 and the like is performed. That is, the spacer 81 acts to widen the interval W1 between the driving side upper rotary cutter 76 and the like and the driven side upper rotary cutter 76 and the like against the biasing force of the coil spring 79.

When the flat cam surfaces 90b of the two spacers 81 on the driving side and the flat cam surfaces 90b of the two spacers 81 on the driven side are in contact (see fig. 15), the distance W1 becomes the maximum open state, and the drive motor 53 is stopped.

In the above state, the upper blade mechanism 52 is lifted up and separated from the lower blade mechanism 51 by a predetermined lift device (not shown). In this state, the flat cam surfaces 90b of the two spacers 81 on the driving side and the flat cam surfaces 90b of the two spacers 81 on the driven side are maintained in contact with each other. In the lock mechanism 110, the drive lever 113 is pulled by the coil spring 115, and is maintained in a state where the engaging portion 112a of the arm portion 112 is inserted into the engaging recess 82a of the ring member 82.

After the maintenance of the lower blade mechanism 51 and the upper blade mechanism 52 is completed, the upper blade mechanism 52 is mounted on the lower blade mechanism 51 again.

Next, the operator presses an "off" button (not shown) provided in the control box 54. In this way, the drive motor 53 is driven in the normal direction, and the upper rotary blade 76 on the drive side and the like are driven in the normal direction by a predetermined amount. Thereby, the closing operation of the pair of opposed upper rotary knives 76 and the like is performed. That is, the distance W1 between the driving-side upper rotary cutter 76 and the driven-side upper rotary cutter 76 and the like is narrowed by the action of the spacer 81 and the biasing force of the coil spring 79.

When the engagement end surfaces 91 of the two spacers 81 on the driving side and the engagement end surfaces 91 of the two spacers 81 on the driven side are in contact (see fig. 12), the aforementioned distance W1 is minimized, and the driving motor 53 is stopped.

In this state, the "close" button of the control box 54 is pressed again. In this way, the cylinder 118 is driven to raise the rod 119. Thereby, the arm portion 112 of the lock mechanism 110 is inclined upward, and the engaging portion 112a is pulled out from the engaging recess 82a (see fig. 5). Thereby, the driven upper rotary blade 76 and the like can be displaced in the circumferential direction of the upper rotary shaft 72.

Then, the operator operates the control device (touch panel) of the blister packaging machine 10 to switch the operation mode of the blister packaging machine 10 from the "inspection mode" to the "production mode".

As described above in detail, according to the present embodiment, the axial distance W1 between the upper rotary blades 76 is variable simply by relatively rotationally displacing the upper rotary blade 76 and the like on the driving side and the upper rotary blade 76 and the like on the driven side. As a result, the assembly work and the disassembly work of the lower blade unit 65 and the upper blade unit 75 can be facilitated.

In the present embodiment, the lock mechanism 110, the drive motor 53, and the like are used, whereby the assembly work and the disassembly work of the plurality of lower blade units 65 and the upper blade unit 75 can be performed fully automatically at the same time and by button operation. Further, the operator does not need to extend his or her hand to the vicinity of the cutting edge of the upper rotary cutter 76 or the like to perform the work, and therefore the work can be performed more safely.

The present invention is not limited to the description of the above embodiments, and may be embodied as follows. Needless to say, it is needless to say that other application examples and modification examples not shown below can be implemented.

(a) The configuration of the blister package 1 to be manufactured (for example, the size and shape of the pouch portion 2) is not limited to the above-described embodiment, and a different configuration may be adopted.

The materials, layer structures, and the like of the container film 3 and the coating film 4 are not limited to the above embodiments. For example, in the above embodiment, the container film 3 is formed of PVC, but the present invention is not limited thereto, and may be formed of not only a resin material such as CPP (cast polypropylene) and PET, but also a metal material such as aluminum.

(b) The structure of the blister film 35 is not limited to the above embodiment. For example, in the above embodiment, five blister packs 1 are simultaneously manufactured in the width direction of the blister film 35, but for example, the configuration may be modified such that only two blister packs are manufactured in the width direction of the blister film 35, or such that only one blister pack is manufactured in the width direction at a time. In addition, in the case where only one sheet is manufactured at a time in the width direction, the configuration is provided with: in the above embodiment, the two upper blade units 75 (the upper rotary blades 76a and 76j) provided corresponding to the discard 35c, and the support unit 100 (the

disk bodies

101a and 101b) paired with the two upper blade units 75 are provided.

(c) In the above embodiment, the cutting device 19 of the present invention is embodied by the configuration of the blister packaging machine 10 disposed for manufacturing the blister package 1, but is not limited thereto, and may be embodied by a configuration of being incorporated in a machine other than the blister packaging machine. Of course, the cutting device 19 may be used alone.

That is, the work to be cut by the cutting device 19 is not limited to the blister film 35 of the above embodiment, and for example, paper or the like conveyed in a belt shape may be used as the object to be cut.

(d) The configuration of the cutting device 19 is not limited to the above embodiment. For example, in the above embodiment, the upper blade mechanism 52 is unitized so as to be detachably attached to the lower blade mechanism 51, but this is not limitative, and a configuration in which the upper blade mechanism 52 and the lower blade mechanism 51 are not detachable may be adopted. In this configuration, the pair of opposed upper rotary blades 76 and the like are opened and closed in the axial direction, thereby facilitating the cleaning operation of the upper rotary blades 76 and the like.

In the above embodiment, the lower rotary blade 66 is sandwiched between the pair of opposed upper rotary blades 76 from both sides in the axial direction. However, the present invention is not limited to this, and the upper rotary cutter may be sandwiched between a pair of lower rotary cutters facing each other in the axial direction. That is, it is also possible to adopt: the 1 st rotation shaft is constituted by the upper rotation shaft and the 1 st rotary knife is constituted by the upper rotary knife, and the 2 nd rotation shaft is constituted by the lower rotation shaft and the 2 nd rotary knife (rotary body) is constituted by the lower rotary knife.

(e) The configurations of the upper blade unit 75 and the holder unit 100 are not limited to the above-described embodiments. For example, in the above embodiment, the coil spring 79 is used as the biasing mechanism, but a disc spring or the like may be used instead.

(f) The configuration of the drive mechanism is not limited to the above embodiment. For example, in the above embodiment, both the lower rotary shaft 62 and the upper rotary shaft 72 are rotationally driven by one drive motor 53 through the

gears

64 and 74. Alternatively, the drive motors may be provided for the lower rotating shaft 62 and the upper rotating shaft 72, respectively.

Further, it may be configured to be provided with a dedicated drive motor or the like for performing opening and closing operations of the pair of opposed upper rotary knives 76 or the like at the time of performing the assembling operation and the disassembling operation of the lower knife unit 65 and the upper knife unit 75, separately from the normal drive motor 53 for cutting the blister film 35.

(g) The restricting mechanism for restricting the operation of the driven-side upper rotary cutter 76 and the like is not limited to the lock mechanism 110, and other configurations may be employed. For example, instead of the lock mechanism 110, a lock mechanism (restricting mechanism) that can be manually operated by an operator may be provided.

Further, as shown in fig. 16, the restricting mechanism may be configured such that the operator manually restricts the operation of the upper rotary blade 76 on the driven side by using a stopper rod (stopper rod)150 having a cylindrical rod shape.

More specifically, as shown in fig. 16, the pair of side wall portions 71 of the upper blade mechanism portion 52 each include a pair of support holes 151 configured to allow the stopper rod 150 to be inserted in parallel with the rotation shaft 72 and to support both end portions of the stopper rod 150.

In response to this, the driven-side upper rotary cutter 76 (left side in fig. 16) is provided with a circular through hole 152 through which the stopper rod 150 can be inserted, and the driving-side upper rotary cutter 76 (right side in fig. 16) is provided with a long hole 153 which is provided so as to allow the stopper rod 150 to be inserted and which is provided in an arc shape along the rotation direction of the upper rotary cutter 76. In fig. 16, although not shown, a plurality of sets of the pair of upper rotary blades 76 having the same configuration are provided, as in the above embodiment.

In the above configuration, the stopper rod 150 is inserted through the support hole 151 into the through hole 152 and the long hole 153 in a state where the through hole 152 and the long hole 153 of the pair of upper rotary blades 76 of the plurality of sets are aligned, and both end portions of the stopper rod 150 are supported by the pair of side wall portions 71.

In the above state, the driven-side upper rotary blade 76 and the driving-side upper rotary blade 76 can be relatively rotationally displaced by rotationally driving the drive motor 53, as in the above-described embodiment. Further, the driven-side upper rotary blade 76 and the driving-side upper rotary blade 76 can be opened and closed in the axial direction by the spacer 81.

(h) In the above embodiment, the drive motor 53 rotates the drive-side upper rotary cutter 76 and the like to relatively rotationally displace the pair of opposing upper rotary cutters 76 and the like. For example, the upper rotary knife 76 and the like on the driven side are manually operated by an operator to rotate the upper rotary shaft 72 while restricting rotational displacement of the upper rotary knife 76 and the like on the driven side, thereby relatively rotationally displacing the pair of opposite upper rotary knives 76 and the like.

Further, the rotation displacement of the driven-side upper rotary cutter 76 and the like may be performed in a state where the driving-side upper rotary cutter 76 and the like are stopped, thereby relatively rotating and displacing the pair of opposing upper rotary cutters 76 and the like.

For example, a hole into which the rod jig is inserted may be provided in the outer peripheral surface of the driven-side ring member 82, and the rod jig may be inserted into the hole by an operator to rotationally displace the upper rotary blade 76 and the like on one driven side at a time. In this configuration, the operator does not need to insert the jig between the pair of upper rotary blades 76 or to perform work near the cutting edge. Of course, the plurality of rod-shaped jigs may be integrally formed, and the plurality of upper rotary blades 76 on the driven side may be rotated and displaced manually by an operator or automatically by a predetermined drive mechanism.

(i) In the above embodiment, the combination of four sets of the opposed pair of upper rotary blades 76 and the combination of two sets of the opposed upper rotary blades 76 and the disc body 101 are provided. This structure can be changed as appropriate according to the structure of the blister film 35.

For example, in the case of producing five blister packs 1 simultaneously in the film width direction without using the blister film 35 having the waste 35b, a combination of six sets of opposing upper rotary knives 76 and the disc body 101 may be provided.

In the combination of the relatively upward rotary cutter 76 and the disc body 101, the disc body 101 is not necessarily biased by the coil spring 79, and the disc body 101 may be configured so as not to be displaced in the axial direction of the upper rotary shaft 72.

(j) The structure of the spacer 81 (protrusion) is not limited to the above embodiment. For example, in the above-described embodiment, two spacers 81 are provided on the axially inner surface of the upper rotating blade 76 or the like, but the number of spacers is not limited thereto, and three or more spacers may be provided. When three or more spacers are provided, the spacers are also provided at equal intervals.

The flat cam surface 90b may be omitted as long as a mechanism for maintaining the pair of opposed upper rotary knives 76 and the like in an open state is separately provided. The engagement end surface 91 may be omitted if there is another configuration in which the driven-side upper rotary cutter 76 is driven by the driving-side upper rotary cutter 76. Further, the spacer 81 may be integrally formed on the inner surface in the axial direction of the upper rotating blade 76 or the like.

Description of the symbols

1 blister pack

2 bag part

3 Container film

4 coating film

10 blister packaging machine

35 blister film

35a to 35c waste

19 cutting device

51 lower cutter mechanism part

52 upper knife mechanism part

53 drive motor

54 control part

62 lower rotating shaft

65 lower cutter assembly

66(66 a-66 f) lower rotary cutter

72 upper rotating shaft

75 go up sword subassembly

76(76 a-76 j) upper rotary cutter

79 coil spring

81 spacer

82 ring component

82a snap recess

90 cam surface

90a inclined cam surface

90b flat cam surface

91 engaging end face

100 support assembly

101(101a, 101b) disk body

110 locking mechanism.

Claims

1. A cutting device for cutting a strip-shaped workpiece in a conveying direction, comprising:

a1 st rotation shaft and a2 nd rotation shaft, the 1 st rotation shaft and the 2 nd rotation shaft being disposed on both sides across the workpiece, respectively, and having a direction orthogonal to a conveying direction of the workpiece as an axial direction;

a1 st rotary knife, the 1 st rotary knife being mounted on the 1 st rotary shaft;

a pair of rotating bodies attached to the 2 nd rotating shaft, at least one of the rotating bodies having a2 nd rotating blade corresponding to the 1 st rotating blade and being provided so as to be displaceable in the axial direction;

a biasing mechanism capable of biasing at least one of the pair of rotating bodies having the 2 nd rotating blade toward the other side; and

a protrusion which is provided along the rotation direction of the rotating bodies and protrudes in the axial direction on a surface of the pair of rotating bodies facing each other, and which has at least an inclined cam surface inclined in the axial direction on a side of the protrusion direction;

an opening operation of expanding the interval in the axial direction of the pair of rotating bodies while sliding the inclined cam surfaces of the pair of rotating bodies against each other by relatively rotating and displacing one of the pair of rotating bodies in the 1 st direction about the 2 nd rotation axis with respect to the other direction;

by relatively rotating and displacing one of the pair of rotating bodies in the 2 nd direction around the 2 nd rotating shaft in the direction opposite to the 1 st direction with respect to the other, the closing operation is performed in which the inclined cam surfaces of the pair of rotating bodies slide against each other while reducing the interval in the axial direction of the pair of rotating bodies.

2. The cutting apparatus according to claim 1, wherein at least one set of rotary cutter groups is provided, and the 2 nd rotary cutter is provided on both the pair of rotary bodies, whereby the 2 nd rotary cutter is offset from both side surfaces in the axial direction of the 1 st rotary cutter.

3. The cutting device according to claim 1 or 2, wherein a plurality of sets of rotary blades are provided, and one of the pair of rotary bodies is provided with the 2 nd rotary blade, so that the 2 nd rotary blade is offset to one side surface in the axial direction of the 1 st rotary blade;

the offset direction of the 2 nd rotary knife in at least one of the multiple groups of rotary knife groups is different from the offset direction of the 2 nd rotary knife in other groups.

4. The cutoff device according to claim 1 or 2, wherein a flat cam surface is provided on a projecting direction side of the protrusion, the flat cam surface being provided so as to be connected to the 2 nd direction side of the inclined cam surface and being orthogonal to the axial direction.

5. The cutting device according to claim 1 or 2, wherein one of the pair of rotating bodies is attached so as not to be displaceable in the circumferential direction of the 2 nd rotating shaft on the 2 nd rotating shaft, and the other rotating body is attached so as to be displaceable in the circumferential direction of the 2 nd rotating shaft on the 2 nd rotating shaft;

6. The cutting device according to claim 5, wherein an end of the projection on the 2 nd direction side has an end surface orthogonal to the 2 nd direction;

7. The cutting device according to claim 5, wherein a regulating mechanism capable of regulating the rotational displacement of the other rotating body in the circumferential direction of the 2 nd rotating shaft is provided.

8. The cutting device according to claim 1 or 2, wherein the drive mechanism is a motor capable of forward and reverse rotation.

9. A blister packaging machine for manufacturing a blister package including a container film having a bag portion for accommodating an object to be contained and a cover film attached to the container film so as to seal the bag portion, the blister packaging machine comprising:

a filling mechanism for filling the object to be stored into the bag part;

a scrap punching mechanism for punching a predetermined scrap portion, which does not form the blister pack, from a band-shaped blister film formed by attaching the cover film to the container film; and

a blister pack cutting mechanism for cutting the blister pack from the blister film at a stage after the scrap portion is die-cut, and forming the blister pack into a product,

wherein the cutting device according to any one of claims 1 to 8 is provided as the blister pack cutting mechanism.