JP2587503B2 - Method and apparatus for attaching film lid to container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Industrial Application Field] The present invention adheres a film lid on four-sided flanges formed on an outer periphery of an upper end portion of a container and closes an opening inside the flanges. The present invention relates to a method and an apparatus for attaching a film lid to a container as described above.

[Prior Art] Conventionally, as this type of apparatus, for example, Japanese Patent Laid-Open No. 1-1534
There is one shown in Japanese Patent Publication No. 06. In the same apparatus, a band-shaped film is placed on four-sided flanges of a container conveyed on a sealing table, and the four-sided flanges and the band-shaped film are sandwiched between a lower mold and a heating seal upper mold, and the band-shaped film is placed on four-sided flanges. The affixed and affixed film lid is pulled out of the band-shaped film according to the outer shape of the four-sided flange, the upper and lower molds are separated from the container with the film lid, and the container is carried out from the seal stand.

[Problems to be Solved by the Invention] In this apparatus, the upper heat seal die forms a square frame in accordance with the four-sided flanges, and the belt-shaped film is simultaneously adhered to the four-sided flanges by the upper heat seal die. I have. Therefore, a square annular seal portion is formed along the four side flanges.

However, since the entire sealing portion is formed by one heat sealing process, the film lid may be peeled off from the flange of the container.

In view of this, the present invention provides a heat sealing process in which the film lid is hardly peeled off from the container by dividing the heat sealing process into two stages to form double sealing portions at the four corners of the four side flanges.

Configuration of the Invention [Means for Solving the Problems] In order to achieve the above object, the invention of claim 1 of the present application according to the sticking method firstly comprises four-sided flanges 2, 3 formed on the outer periphery of the upper end of the container 1. A band-shaped film 76 is placed on the four sides of the flanges 2 and 3 so as to cover the opening 5 inside the flanges 2 and 3, and then the four sides of the flanges 2 and 3 intersect with the length direction of the band-shaped film 76. The heating plates 25, 29 of a predetermined length are pressed from above the two flanges 2 facing each other, and the flanges 2 on the two sides and the strip film 76 are linearly sealed by the sealing portion 6, and then the strip shape is formed. The film 76 is cut in a direction intersecting the length direction of the film 76 and covers the opening 5 of the container 1. Separated, and then the strip film 76 of the four side flanges 2, 3 The heating plate 40 having a predetermined length is pressed from above the two flanges 3 facing each other along the length direction, and the two flanges 3 and the film lid 4 are linearly sealed by the sealing portion 7. The gist is that the sealing portions 6 and 7 are overlapped with each other at four corners 8 of the container 1, and the opening 5 inside the four sides of the flanges 2 and 3 is closed by the film lid 4.

The invention according to claim 2 of the present invention relates to a sticking device, wherein a film lid 4 is stuck on four sides of flanges 2, 3 formed on the outer periphery of the upper end of the container 1, and an opening inside the flanges 2, 3 is provided. In a device for attaching a film lid to a container in which the container 5 is closed, a predetermined direction is set in a direction intersecting the length direction of the band-shaped film 76 placed on the four-sided flanges 2 and 3 so as to cover the opening 5 of the container 1. A pair of heating plates 25 having a length and being capable of pressing the band-shaped film 76 from above the two sides of the flanges 2 facing each other across the length of the band-shaped film 76 among the four-sided flanges 2, 3, A first sealing mechanism A provided with 29, and the strip-shaped film 76 are provided so as to be cut in a direction intersecting with the length direction thereof, and are provided on the two-sided flange 2 while covering the opening 5 of the container 1. The attached film lid 4 is separated from the band-shaped film 76 together with the container 1. Possible separating member 34
Has a predetermined length in the length direction of the band-shaped film 76,
A second seal provided with a pair of heating plates 40 capable of pressing the film lid 4 from above two flanges 3 opposed to each other along the length direction of the band-shaped film 76 among the flanges 2 and 3 on the four sides. The gist is that the mechanism B is provided.

Further, the invention of claim 3 of the present application is the invention according to claim 2, wherein the heating plates 25, 29 in the first sealing mechanism A are provided.
Are provided so as to be relatively movable in a direction of approaching and separating from each other, and both heating plates 40 in the second seal mechanism B are provided so as to be relatively movable in a direction to approach and separate from each other. The plate 40 is provided so as to be movable in the same direction as the relative movement direction of the two heating plates 25 and 29 in the first seal mechanism A in synchronization with the relative movement of the two heating plates 25 and 29 in the first seal mechanism A. The main point is.

[Operation] Therefore, in the invention of claim 1 or claim 2 of the present invention, first, four-sided flanges 2, 3 formed on the outer periphery of the upper end portion of the container 1 are provided.
A strip-shaped film 76 placed on the flanges 2 and 3 so as to cover the openings 5 has a heating plate having a predetermined length with respect to two opposite sides of the strip 2 which intersect with the length direction of the strip-shaped film 76 and face each other.
Pressed and sealed by 25 and 29. Then, when the strip film 76 is cut in a direction intersecting the longitudinal direction, the film lid 4 stuck to the flanges 2 on the two sides while covering the opening 5 of the container 1 is attached. Together with the strip-shaped film 76. Next, the film lid 4 is pressed against the two opposite flanges 3 along the strip film 76 by a predetermined length of the heating plate 40 to be sealed. Then, the film lid 4 is overlap-sealed at the four corners 8 of the container 1 and closes the openings 5 inside the flanges 2 and 3 on the four sides.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The container 1 made of synthetic resin shown in FIG. 2 is for storing tofu, and has four side flanges 2, 3 around the upper end thereof.
Are formed. The first two flanges on the four sides
As shown in the figure, a film lid 4 made of synthetic resin is stuck by heat sealing, and an opening 5 inside the flanges 2 and 3 is formed.
Is closed by the film lid 4. As shown in FIG. 3 (c), of the four sides of the flanges 2, 3, the sealing part 6 of the two opposite flanges 2 and the sealing part 7 of the other two opposite flanges 3 are provided. Means that they overlap each other at the four corners 8 of the four flanges 2 and 3. The one flange 2 and the sealing portion 6 extend in a direction intersecting with the longitudinal direction of a band-shaped film 76 described later, and the other flange 3 and the sealing portion 7 extend along the longitudinal direction of the band-shaped film 76 described later. Extending.

Next, an apparatus for attaching the film lid 4 to the four flanges 2 and 3 of the container 1 will be described in detail.

The apparatus has a first sealing mechanism A for sealing the band-shaped film 76 to one of the two opposite flanges 2 of the four flanges 2 and 3 of the container 1, and the other two opposite flanges 3 to each other. On the other hand, a second seal mechanism B for sealing the strip film 76, a container supply mechanism C for supplying the container 1 to the first seal mechanism A, and transferring the container 1 from the first seal mechanism A to the second seal mechanism B. A container transfer mechanism D, a container unloading mechanism E for unloading the container 1 with the film lid 4 stuck thereon, and a film supply mechanism F for supplying the belt-shaped film 76 onto the four sides of the container 1 on the flanges 2 and 3 are provided. .

 Next, each mechanism will be described separately with reference to FIGS.

First Sealing Mechanism A A front mounting plate 10 is provided upright at the front end of the lift 9.
A movable table 11 is supported movably in the front-rear direction on the elevating table 9 behind the front mounting plate 10, and a rear mounting plate 12 faces the front mounting plate 10 on the movable table 11. It is erected. When the elevator 9 moves up and down, the front and rear mounting plates 10 and 12 also move up and down.

Rotating shafts 14 and 15 that rotate in conjunction with each other are supported between the front end portion and the rear end portion of the left and right machine frames 13, and between the left and right end portions of the front and rear rotating shafts 14 and 15. Support plate 16 each
Are screwed at both front and rear ends. The left and right support plates 16 move in the left and right directions along the coaxes 14 and 15 by the rotation of the front and rear rotation shafts 14 and 15 so that they can approach and separate from each other.

A fixed plate 17 is attached to the front end of the support plate 16 on both left and right sides of the elevating table 9, and the movable plate 8 is supported on the fixed plate 17 so as to be movable in the front-rear direction along the elongated hole 19. I have.
Between the front and rear mounting plates 10 and 12, left and right mounting plates 20, 21 are erected at the distal end of the left and right fixed plates 17 and the distal end of the left and right movable plates 18, respectively. And both left and right support plate 16
When the two move toward and away from each other, the left and right fixed plates 17 and the left and right movable plates 18 move in the left and right directions, and
The mounting plates 21 of the left and right movable plates 18 approach and separate from each other along the front and rear mounting plates 10 and 12. Rear mounting plate
When 12 moves in the front-back direction, both left and right movable plates 18 also move in the front-back direction. The shape of the mounting space 22 formed inside the front and rear mounting plates 10, 12 and the left and right mounting plates 20, 21 forms a square shape when viewed from above, and is between the front and rear mounting plates 10, 12. By changing the interval and the interval between the left and right mounting plates 20, 21,
The size of the mounting space 22 can be changed.

An air cylinder 24 is attached to a mounting plate 23 provided between the left and right machine frames 13 above the front mounting plate 10, and a pre-heating plate 25 faces a front mounting plate 10 on a piston rod 24a. Has been attached. When the piston rod 24a moves up and down, the preheating plate 25 can come into contact with or separate from the front mounting plate 10.

An air cylinder (not shown) is attached to a mounting member 27 attached to the connection plate 26 above the rear mounting plate 12, and a post-heating plate 29 faces a rear mounting plate 12 on a piston rod 28 thereof. Has been attached. When the piston rod 28 moves up and down, the post-heating plate 29 can come into contact with or separate from the rear mounting plate 12.

A male screw bar 30 is rotatably supported by the mounting member 27, and a mounting plate 32 is mounted on a female screw cylinder 31 screwed to the male screw bar 30.
Is attached. An air cylinder (not shown) is attached to the mounting plate 32, and a knife 34 as a separating member is rotatably supported via a link 35.
The piston rod 33 of the air cylinder is linked to the link 35, and the knife 34 can be rotated in the left-right direction in a circular arc slightly behind the rear mounting plate 12 by the link. The female screw bar 30 is provided with a knob 30a.
When the rotating operation of 0a is performed, the mounting plate 32, the piston rod 33 of the air cylinder, the knife 34, and the link 35 are moved through the female screw cylinder 31.
And the like can move in the front-rear direction along the male screw rod 30.

The connecting plate 26 is movable in the front-rear direction as described later. Therefore, when the connecting plate 26 moves in the front-rear direction, the mounting member 27 and the post-heating plate
29 and the knife 34 can be moved in the front-back direction. The post-heating plate 29 and the post-mounting plate 12 are simultaneously moved in the front-rear direction, and always face each other.

Regarding the second seal mechanism B A support frame 37 is supported on the left and right fixed rails 36 attached to the left and right machine frames 13 movably in the front-rear direction. The connection plate 26 of the first seal mechanism A is attached to the front side of the support frame 37, and the mounting member 27 of the first seal mechanism A can move in the front-rear direction together with the support frame 37 via the connection plate 26. ing. Both left and right mounting plates 38 are supported in the support frame 37 so as to be movable in the left and right directions, and can be approached and separated from each other.
An air cylinder 39 is mounted below the left and right mounting plates 38, and left and right heating plates 40 are mounted on the piston rod 39a.

A mounting rail 41 is attached below the left and right mounting plates 38 via a connecting plate 42. The left and right mounting rails 41 extend in the front-rear direction from behind the rear mounting plate 12 of the first seal mechanism A to the rear of the support frame 37, and are guide grooves extending in the front-rear direction between the left and right mounting rails 41. 43 are formed.

A frame plate 45 is attached to the connecting plate 44 attached to the lower side of the support frame 37 below the left and right mounting rails 41. The left and right frame plates 45 extend in the front-rear direction from the rear of the rear mounting plate 12 of the first seal mechanism A to the rear of the support frame 37, and are integrally connected. A transport chain 46 is supported on the left and right frame plates 45, and a plurality of feed rods 47 are provided between the left and right chains 46. A connecting plate 48 is attached to the lower side of the left and right mounting plates 38, and the lower end of the connecting plate 48 is supported by the left and right supporting plates 16 of the first seal mechanism A so as to be movable in the front-rear direction. .

When the left and right support plates 16 move in the left and right direction and approach and separate from each other, the left and right mounting plates 38 and the air cylinder 39, the heating plate 40, the mounting rail 41, and the like attached thereto move in the left and right direction, The left and right heating plates 40 and the left and right mounting rails 41 can approach and separate from each other to change the distance between them. When the support frame 37 moves in the front-rear direction, the left and right mounting plates 38 and the air cylinders 39, the heating plate 40, the mounting rails 41, and the left and right frame plates 45 attached thereto can move in the front-rear direction. It has become.

The left and right frame plates 45 are connected to the rear mounting plate 12 of the first seal mechanism A via a connecting rod 49, and the rear mounting plate 12 can move up and down with respect to the connecting rod 49. Then, when the frame plate 45 moves in the front-rear direction, the rear mounting plate
The 12 can also move forward and backward.

Regarding the container supply mechanism C, rotating shafts 51 and 52 are provided on both front and rear sides between the left and right machine frames 50, and front and rear both ends of a movable member 53 are screwed on left and right sides of the front and rear rotating shafts 51 and 52. I have. A mounting plate 54 is attached to the left and right movable members 53, and inner edges 54 of the left and right mounting plates 54 are provided.
A guide groove 55 extending in the front-rear direction is formed between a.
When the front and rear rotation shafts 51 and 52 rotate, the left and right movable members 53 move in the left and right direction, and the left and right mounting plates 54 approach and separate from each other so that the interval between the inner edges 54a can be changed. Has become.

A first chain 56 is supported between both front and rear ends of the left and right machine frames 50, and a plurality of first feed rods 57 are bridged between the left and right first chains 56. A second chain 58 is supported at the rear ends of the left and right machine frames 50, and a plurality of second feed rods 59 are bridged between the left and right second chains 58. The rotation speed of the second chain 58 is higher than the rotation speed of the first chain 56.

Regarding the container transfer mechanism D, guide rails 60 are attached to the left and right machine frames 13 on both the left and right sides of the first seal mechanism A, and the support base 61 is supported movably in the front-rear direction along the guide rails 60. I have. A rotary belt 62 is supported by the two machine frames 13, and a support base 61 is connected to the rotary belt 62. This support 61
A base plate 63 is supported movably in the left-right direction on the upper side, and a pair of air cylinders 64, 65 are mounted on the base plate 63. The base plate 63 is supported by the support plate 16 via a connecting plate 66 so as to be movable in the front-rear direction. A fixed gripping plate 67 and a movable gripping plate 68 that can be opened and closed with respect to the fixed gripping plate 67 are attached to the piston rod 64a of one air cylinder 64, and the movable gripping plate 68 is fixed by the urging force of a spring 69. It is open to the holding plate 67. The movable holding plate 68 is connected to a piston rod 65a of the other air cylinder 65, and can be opened and closed with respect to the fixed holding plate 67 by the protruding and retracting of the piston rod 65a.

The left and right movable plates 18 of the first seal mechanism A are connected to the left and right frame plates 45 of the second seal mechanism B via rods 45a so as to be movable in the left and right directions.

When the piston rod 64a of one of the air cylinders 64 projects, the leading edges of the fixed gripping plate 67 and the movable gripping plate 68 follow the left and right mounting plates 20, 21 of the first seal mechanism A. And
When the left and right support plates 16 approach and separate, the base plate 63 and the two air cylinders 64, 65 and the upper and lower gripping plates 67, 68 attached thereto move in the left and right direction, and the left and right upper and lower gripping plates 67, 68 is arranged so as to approach and separate from the left and right mounting plates 20 and 21 at the same time and to change the distance therebetween. or,
When the belt 62 rotates, the support base 61 moves in the front-rear direction along the guide rail 60, and the base plate 63, both the air cylinders 64, 65, and the upper and lower gripping plates 67, 68 move in the front-rear direction. By this forward and backward movement, the upper and lower gripping plates 67, 68 are moved to the left and right mounting plates 20, 21.
And the front and rear mounting rails 41 of the second seal mechanism B.

Regarding the container unloading mechanism E This mechanism E is shared by the left and right mounting rails 41, the guide grooves 43, the left and right frame plates 45, the left and right transport chains 46, and the respective feed rods 47 in the second sealing mechanism B. The left and right unloading rails 70 are connected to the both mounting rails 41.

About the film supply mechanism F A support rod 71 is rotatably supported by the machine frame 13 above the second seal mechanism B, and a belt brake 72 is attached to the support rod 71. A tension lever is provided below the support rod 71 on the machine casing 13 as a tension applying member.
73 is rotatably supported and the air cylinder
The piston rod 74 of this air cylinder 74 is attached.
a can contact the tension lever 73. The film take-up roll 75 is fitted into the support rod 71, and the strip-shaped film 76 pulled out therefrom is used as the guide roller 73a of the tension lever 73 and each of the guide rollers 7 attached to the machine frame 13.
7 to the first seal mechanism A.

A pair of left and right brackets 78 extend toward the first seal mechanism A at the front side of the connecting plate 42 extending downward from the left and right mounting plates 38 of the second seal mechanism B.
An air cylinder 79 is attached to 78. A holding member 80 is attached to the piston rod 79a of the air cylinder 79, and the holding member 80 can come into contact with or separate from the left and right mounting rails 41 as the piston rod 79a moves up and down. .

The left and right air cylinders 79 move with the front and rear movement of the left and right mounting plates 38 of the second seal mechanism B, and move in the left and right direction with the left and right movements of the two mounting plates 38 to reduce the distance between the left and right holding members 80. It can be changed.

Next, the operation of this device configured as described above will be described in the seventh to ninth embodiments.
The details will be described with reference to the drawings.

First, the left and right support plates 16 are adjusted to move in the left and right directions along the front and rear rotation shafts 14 and 15 according to the front and rear widths and the left and right widths of the flanges 2 and 3 of the container 1, and the support frame 37 is fixed to the fixed rail.
Move and adjust in the front-back direction along 36. With this adjustment,
In the first sealing mechanism A, the front-rear space between the front and rear mounting plates 10 and 12, the left-right space between the left and right mounting plates 20 and 21, the front-rear space between the front and rear heating plates 25 and 29, and the front and rear of the knife 34. The direction position is determined. The position of the knife 34 can be adjusted by turning the knob 30a. In the second seal mechanism B,
Left and right heating plates 40, left and right mounting rails 41 and left and right frame plates 45
, The left-right space between the left and right heating plates 40 and the left-right space between the left and right mounting rails 41 are determined. In the container supply mechanism C, the horizontal distance between the left and right mounting plates 54 is determined. In the container transfer mechanism D, the positions of the left and right upper and lower gripping plates 67 and 68 in the front-rear direction and the intervals between them in the left-right direction are determined. In the container unloading mechanism E,
The position of the left and right mounting rails 41 of the second seal mechanism B in the front-rear direction, the distance between them in the left-right direction, and the position of the left and right frame plates 45 in the front-rear direction are determined. In the film supply mechanism F, the position in the front-rear direction of the left and right pressing members 80 and the interval between them in the left-right direction are determined.

After adjusting the mechanisms A to F in this way, the present apparatus is operated.

FIGS. 7A to 7J show the operation in the first cycle.
In the processing state shown in FIG. 7 (a), in the first sealing mechanism A, the elevator 9 moves up and the front and rear mounting plates 10 and 12 are in the upper moving position, and the front and rear heating plates 25 and 29 and knife 34
Is in the up position. In the second sealing mechanism B, the left and right heating plates 40 are at the upward movement position. In the container supply mechanism C, the first container 1a and the second container 1b are inserted into the guide grooves 55, and their left and right flanges 3 are placed on the inner edges 54a of the left and right mounting plates 54. In the container transfer mechanism D, both gripping plates 67 and 68 are in the first sealing mechanism A in a state where they are closed with each other. In the film supply mechanism F, the band-shaped film 76 is pulled out from the film take-up roll 75 and is held between the two holding plates 67 and 68 of the container transfer mechanism D by the first sealing mechanism A. The belt-like film 76 is prevented from being pulled out from the film take-up roll 75 any more, and the tension lever 73 is in a free state, so that the belt-like film 76 is given a light tension. Further, both the right and left holding members 80 are in the upward movement position.

When this apparatus is operated, as shown in FIG. 7 (b),
Both chains 56, 58 of the container supply mechanism C rotate, and both containers 1a,
1b is pushed by the two feed rods 57, 59 and conveyed to the first seal mechanism A, and the elevating table 9 of the first seal mechanism A moves down, so that the front and rear mounting plates 10, 12 move down.

As shown in FIG. 7 (c), the transport speed of the first container 1a is faster than the transport speed of the second container 1b,
1a gradually moves away from the second container 1b to reach the first sealing mechanism A. Then, the band brake 72 of the film supply mechanism F is released, and both the gripping plates 67 and 68 of the container transfer mechanism D move to the left and right mounting rails 41 of the second seal mechanism B, and the band-shaped film 76 is wound. It is withdrawn from the take-up roll 75.

As shown in FIG. 7 (d), when the left and right flanges 3 of the first container 1a are placed on the left and right mounting plates 20, 21 of the first seal mechanism A, the two holding plates 67 of the container transfer mechanism D are moved. , 68 stop on the left and right mounting rails 41 of the second seal mechanism B, and the band brake 72 of the film supply mechanism F operates to prevent the rotation of the film take-up roll 75. The strip film 76 is applied on the four side flanges 2 and 3 of the first container 1a.

Next, as shown in FIG. 7 (e), the right and left holding members 80 of the film supply mechanism F are moved downward to hold the band-shaped film 76 between the left and right mounting rails 41.

As shown in FIG. 7 (f), the tension lever 73 of the film supply mechanism F is moved to the piston rod 74 of the air cylinder 74.
When pressed downward by a, tension is applied to the strip film 76.

Next, as shown in FIG. 7 (g), the two holding plates 67, 68 of the container transfer mechanism D release the holding of the band-shaped film 76.

Then, as shown in FIG. 7 (h), the front and rear mounting plates 10, 12 of the first seal mechanism A move up, and the front and rear heating plates 25, 29 move down, so that the first container 1a Both front and rear flanges 2
The band-shaped film 76 is sandwiched between the front and rear mounting plates 10 and 12, and the band-shaped film 76 is heat-sealed on the front and rear flanges 2. At this time, the right and left pressing members 80 of the film supply mechanism F move upward to release the pressing of the band-shaped film 76, and the pressing of the tension lever 73 of the mechanism F is released.

During this heat sealing, as shown in FIG.
34 also moves downward, and the strip film 76 is cut. At this time, both gripping plates 67 and 68 of the container transfer mechanism D start to return into the first seal mechanism A.

Thereafter, as shown in FIG. 7 (j), the front and rear heating plates 25 and 29 and the knife 34 of the first sealing mechanism A move upward. The second container 1b has reached just before the first sealing mechanism A.

Next, as shown in FIG. 8 (a), when the third container 1c is placed on the container supply mechanism C, the second cycle is started as shown in FIGS. 8 (a) to (j). First container 1a mounted on each mounting plate 10, 12, 20, 21 of first sealing mechanism A
The left and right flanges 3 and the band-shaped film 76 thereon are gripped by both gripping plates 67 and 68 of the container transfer mechanism D.

FIGS. 8 (a) to (j) showing the operation in the second cycle correspond to FIGS. 7 (a) to (j) showing the operation in the first cycle. Is different in the following points. That is, in the second cycle, as shown in FIGS. 8 (b), (c), and (d), the first container 1a is heated and sealed by the first sealing mechanism A, and then the two holding plates of the container transferring mechanism D are moved. It is conveyed by 67, 68 to the guide groove 43 of the second seal mechanism B, and its left and right flanges 3 are placed on both the left and right mounting rails 41, where the rear flange 2 of the first container 1a and the upper flange 2 are placed. FIG. 8 (e) shows the band-shaped film 76.
As shown in (g), the film supply mechanism F is sandwiched between the left and right mounting rails 41 by the left and right holding members 80.
Then, after the heat sealing process shown in FIG. 8 (h), the strip-shaped film 76 is cut by the knife 34 as shown in FIGS. 8 (i) and (j), and the first container 1a is placed in FIG. 3 (b). The state shown in is shown. That is, the opening 5 inside the four sides of the flanges 2 and 3 is covered by the film lid 4 cut and separated from the strip-shaped film 76 together with the same container 1a, and the film lid 4 is formed by the front and rear flanges of the container 1a. Sealing part 6 of predetermined length for 2
Is affixed.

FIGS. 9A to 9J show the operation of the first cycle also in the third cycle shown in FIGS. 9A to 9J and FIG. 8A showing the operation of the second cycle. The third cycle differs from the first and second cycles in the following points. That is, in the third cycle, as shown in FIGS. 9 (h) and 9 (i), the first container 1a is pushed by the feed rod 47 of the second seal mechanism B to reach below the left and right heating plates 40, The left and right heating plates 40 are moved down, and the left and right flanges 3 of the first container 1a and the film 76 thereon are clamped between the left and right mounting rails 41.
The film 76 is heat-sealed on the upper surface to reach the state shown in FIG.

The second container 1b following this first container 1a, the third container 1c
The fourth container 1d is also sequentially heat-sealed in the same manner as the first container 1a.

Although not shown, in the next fourth cycle, the first container 1a is pushed by the feed rod 47 of the container unloading mechanism E, and the left and right mounting rails are moved.
From 41, it is sent to both left and right discharge rails 70. The operation in the fourth cycle is the same as the operation in the third cycle.

In particular, in the present embodiment, the heat sealing process is divided into two stages, that is, the case using the first sealing mechanism A and the case using the second sealing mechanism B.
Of these, a seal portion 6 formed on one of the two opposite flanges 2 and a seal portion 7 formed on the other two opposite flanges 3 are formed into four corner portions 8 of the four flanges 2, 3.
To polymerize each other. Accordingly, the double sealing portions 6 and 7 are formed, and the joining between the container 1 and the film lid 4 is strengthened, and the film lid 4 is hardly peeled off from the container 1.

Also, according to the size of the container 1, the distance between the front and rear mounting plates 10, 12, 20, 21 of the first sealing mechanism A and the front and rear heating plates 25, 29
And the distance between the left and right mounting rails 41 of the second seal mechanism B and the distance between the left and right heating plates 40, etc., change. Need to be done, that need is gone,
It is very effective in work efficiency.

Further, when the post-heating plate 29 in the first seal mechanism A moves back and forth, the left and right heating plates 40 in the second seal mechanism B also move back and forth through the attachment member 27, the connecting plate 26 and the support frame 37 in synchronization. The first and second seal mechanisms A and B can be smoothly adjusted in the front-rear direction in response to the change in the front-rear width of the container 1.

In addition, first, the heating plate of the first sealing mechanism A is attached to the front and rear flanges 2 which intersect with the length direction of the strip film 76.
After heat-sealing by 25 and 29, the opening 5 of the container 1
The film lid 4 attached to the front and rear flanges 2 is cut and separated from the band film 76 together with the container 1 in a state of covering the front and rear flanges 2. Thereafter, the film lid 4 is attached to the left and right flanges 3 along the length direction of the band film 76. Since the heat sealing process is performed by the heating plate 40 of the second sealing mechanism B, for example, even when the front and rear width of the container 1 is small, the sealing portion 7 of the heating plate 40 having a predetermined length is continuously supplied. The two flanges 3 of the front and rear containers 1 are not sealed twice over each container 1 and the appearance after sealing is not deteriorated.

According to the first or second aspect of the present invention, the heating plates 25, 29, and 40 having a predetermined length are pressed and heat-sealed. The heating plate 40 can be firmly adhered to the containers 2 and 3, and even if the size of the container 1 is small in the length direction of the band-shaped film 76, the heating plate 40 may seal twice over each container 1 that is continuously supplied. The film lid 4 can be stuck on the flanges 2 and 3 of the container 1 with good appearance.

Further, according to the invention of claim 3 of the present application, even when the size of the container 1 is further changed, the sealing position can be appropriately moved and adjusted, and the movement can be adjusted smoothly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a film lid is attached to a container, FIG. 2 is a perspective view showing the container, and FIGS. 3 (a) and 3 (b).
(C) is a plan view showing a procedure for heat sealing the film lid to the container, FIG. 4 is a side sectional view showing the present apparatus, FIG. 5 is a partially cutaway plan view similarly, and FIG. 7 (a) to 7 (j) are explanatory diagrams showing the operation of the first cycle of the present apparatus, and FIGS. 8 (a) to 8 (j) show the action of the second cycle of the present apparatus. FIG. 9 (a)-
(J) is an explanatory view showing an operation in a third cycle of the present apparatus. 1, 1a-1d ... container, 2 ... front and rear flanges, 3 ... left and right flanges, 4 ... film lid, 5 ... opening, 6 ...
Seal part of both front and rear flanges 2, 7...
Seal part, 8 ... four corners, A ... first seal mechanism, 10
...... front mounting plate, 12 ... rear mounting plate, 20, 21 ... left and right mounting plates, 25 ... front heating plate, 29 ... rear heating plate, 34 ... knife as separating member, B: second sealing mechanism, 40: left and right heating plates, 41: left and right mounting rails, 45: left and right frame plates,
C: container supply mechanism, 54: left and right mounting plates, D: container transfer mechanism, 67, 68: gripping plate, E: container unloading mechanism, F
…… Film supply mechanism, 71… Support rod (support part), 72…
… Band brake, 73… tension lever as tension applying member, 74… air cylinder as tension applying member, 75… film take-up roll, 76… band-shaped film, 80… both right and left holding members.

Claims (3)

(57) [Claims] 1. First, the four-sided flanges (2,3) are formed on four-sided flanges (2,3) formed on the outer periphery of the upper end of the container (1).
The strip film (76) is placed so as to cover the opening (5) inside the box, and then, the flanges (2, 3) of the four sides intersect with the length direction of the strip film (76) and face each other. A heating plate (25, 29) having a predetermined length is pressed from above the two sides of the flange (2), and the two sides of the flange (2) and the strip film (76) are pressed.
Are sealed linearly with a sealing portion (6), and then the strip film (76) is cut in a direction intersecting the length direction thereof to cover the opening (5) of the container (1). The film lid (4) attached to the flanges (2) on the two sides with the container (1) together with the band-like film (7).
6), and then heating of a predetermined length from above the two flanges (3) opposed to each other along the length direction of the strip film (76) among the four flanges (2, 3). By pressing the plate (40), the flanges (3) on two sides thereof and the film lid (4) are linearly sealed by the sealing portion (7), and the two corners (8) of the container (1) are used to seal the two sides. Seal part (6)
(7) A method of attaching a film lid, wherein the openings (5) inside the four-sided flanges (2, 3) are closed by a film lid (4) by superimposing the two. 2. A film lid (4) is stuck on four-sided flanges (2, 3) formed on the outer periphery of the upper end of the container (1), and an opening (5) inside the flanges (2, 3) is provided. In a device for attaching a film lid to a container which is adapted to close the container, the length of the band-shaped film (76) placed on four-sided flanges (2, 3) so as to cover the opening (5) of the container (1). And has a predetermined length in a direction intersecting the length direction, and above two flanges (2) opposed to each other across the length direction of the strip film (76) among the four side flanges (2, 3). The first sealing mechanism (A) provided with a pair of heating plates (25, 29) capable of pressing the strip-shaped film (76) from above, and the strip-shaped film (76) can be cut in a direction intersecting its length direction. And attached to the flanges (2) on the two sides while covering the opening (5) of the container (1). And Irumu lid (4) said filmstrip (76) can be separated from a separating member with a container (1) (34) has a predetermined length to the length direction of the film strip (76),
Band-shaped film (76) of the four side flanges (2,3)
And a second sealing mechanism (B) provided with a pair of heating plates (40) capable of pressing the film lid (4) from above two flanges (3) opposed to each other along the length direction. A device for attaching a film lid to a container, comprising: 3. The heating plates (25, 29) of the first sealing mechanism (A) are provided so as to be relatively movable in a direction of approaching and separating from each other, and the heating plates (25, 29) of the second sealing mechanism (B) are provided. The heating plates (40) in the second sealing mechanism (B) are provided so as to be relatively movable in directions approaching and separating from each other, and the heating plates (25, 29) in the first sealing mechanism (A) are connected to each other. 3. Affixing the film lid to the container according to claim 2, wherein the film lid is provided so as to be movable in the same direction as the relative movement direction of the two heating plates (25, 29) in the first sealing mechanism (A) in synchronization with the relative movement. apparatus.