JPH03133703A - Vessel lidded with film, and method and apparatus for film-lidding vessel - Google Patents

Abstract

PURPOSE:To prevent a film-lid from coming off a vessel easily by providing heat- sealing in two steps in such a manner as to effect a double sealing at four corners of the flange. CONSTITUTION:A vessel 1a is conveyed to a first sealing mechanism A, where a flange 3 at the right and at the left is mounted on two mounting plates 20, 21 at the left and at the right and then a strip of film 76 is paid off from a film roll 75 and applied onto the flange 2, 3 on all four sides with tension given to the film by a tension lever 73. Then two mounting plates 10, 12 arranged one before and the other behind move upward, whereas two heating plates 25, 29 arranged one before and the other behind move downward, so that the film 76 is attached to the flange 2 before and behind by heat-sealing. Subsequently, the vessel 1a is conveyed to a second sealing mechanism, where the flange 3 at the right and at the left is mounted on two mounting rails 41 at the right and at the left; after heat-sealing attaching the flange 2 at the back to the film 76, the film 76 is cut off by a knife 34. Next the vessel 1a is brought under two heating plates 40 at the right and at the left, which attach the film 76 to the flange 3 at the right and at the left by heat-sealing, so that double sealing 6, 7 results at four corners 8 of the flange 2, 3.

Description

[Detailed Description of the Invention] Purpose of the Invention [Industrial Field of Application] This invention relates to tofu, etc., in which a film lid is stuck on the four-sided flanges formed on the outer periphery of the upper end to close the openings on the inside of the flanges. The present invention relates to a container, a method for clamping a film lid to the container, and an apparatus therefor.

[Prior Art] Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No. 1-153
There is one shown in Publication No. 406. In this device, a film strip is placed on the flanges on the four sides of a container that is transported onto a sealing table, and the flanges on the four sides and the film strip are sandwiched between a lower mold and an upper heat-sealing mold to attach the film strip to the flanges on the four sides. The attached film lid is removed from the band-shaped film in accordance with the outer shape of the flanges on the four sides, and the upper and lower molds are separated from the container with the film lid, and the container is carried out from the sealing table.

[Problem to be Solved by the Invention 1] In this device, the heat-sealing upper mold has a square frame shape that matches the flanges on the four sides, and the strip-shaped film is simultaneously attached to the flanges on the four sides by the heat-sealing upper mold. There is. Therefore, a square annular seal portion is formed along the flanges on the four sides.

However, since this entire seal portion is formed by a single heat sealing process, there is a risk that the film lid may peel off from the flange of the container.

Therefore, in the present invention, the heat sealing process is divided into two stages so that double seals are formed at the four corners of the flanges on the four sides, so that the film lid can be peeled off from the container three times.

Structure of the Invention [Means for Solving the Problems] In view of this object, a container with a film lid according to the present invention has a container 1 as shown in boxes 1 to 3 in the drawings of the embodiment described later.
Of the four-sided flanges 2.3 formed on the outer periphery of the upper end,
The film M4 is sealed on the flange 2 on one of the two opposing sides, and the same film M4 is sealed on the flange 3 on the other two opposing sides, and the four corners 8 of the container 1 are sealed.
Then, both the seal parts 6 and 7 are overlapped with each other, and the openings 5 inside the flanges 2.3 on the four sides are closed with the film lid 4.

In addition, the method of attaching a film lid to a container according to the present invention is as shown in figures 4 to 9 of the inner box in the drawings of the embodiment described later.
First, the flanges 2 on the four sides formed on the outer periphery of the upper end of the container 1
．． Place the film 76 on the flanges 2, 3 on the four sides of the container 1, seal the film 76 on the flanges 2 on one of the two opposing sides of the flanges 2, 3 on the four sides of the container 1. A film 76 is sealed on the flanges 3 on the other two opposing sides, and the sealed portions 6.7 are overlapped with each other at the four corners 8 of the container 1, and the film 76 is sealed on the inside of the flanges 2 and 3 on the four sides. A certain opening 5 is closed with a film 76.

Further, the device for attaching a film lid to a container according to the present invention has four side flanges 2 formed on the outer periphery of the upper end of the container 1.
, 3, in which one of the flanges 2, 3 on the four sides of the container 1 is attached. A mounting member 10.12 that supports the lower sides of the flanges 2 on two opposing sides, and a seal that seals the film 76 placed on the flanges 2.3 of the container 1 onto the flanges 2 on the two opposing sides. A first sealing mechanism A provided with members 25 and 29, a mounting member 41 that supports the lower side of the flanges 3 on the other two opposing sides of the flanges 2.3 on the four sides of the container 1, and The second sealing mechanism B is provided with a seal member 40 for sealing the film 76 placed on the flanges 2 and 3 of 1 onto the flanges 3 on the two opposing sides.

[Function] In the present invention, the four corners 8 of the flanges 2 and 3 of the container 1
The double seal parts 6 and 7 that can be formed are the container 1 and the film lid 4.
strengthen the bond with

[Example] An embodiment of the present invention will be described below with reference to the drawings.

A container 1 made of synthetic resin shown in FIG. 2 is for storing tofu, and has flanges 2 and 3 on four sides on the outer periphery of its upper end.
is formed. As shown in FIG. 1, a synthetic resin film lid 4 is pasted onto the flanges 2 and 3 on the four sides by heat sealing, and the opening 5 on the inside of the flanges 2 and 3 is opened by this film lid 4. It's blocked. Among the flanges 2.3 on the four sides, as shown in FIG. 3(C), a seal portion 6 on one of the flanges 2 on two opposing sides, and a seal portion 7 on the flange 3 on the other two opposing sides. and overlap each other at the four corners 8 of the flanges 2 and 3 on the four sides.

Next, a device for attaching the film lid 4 to the flanges 2 and 3 on the four sides of the container 1 will be described in detail.

This device includes a first sealing mechanism A that seals the strip film 76 to one of the flanges 2 and 3 on the four sides of the container 1, and a flange 3 on the other two sides facing each other. On the other hand, there is a second sealing mechanism B that seals the strip film 76, a container supply mechanism C that supplies the container 1 to the first sealing mechanism A, and a container feeding mechanism C that transfers the container 1 from the first sealing mechanism A to the second sealing mechanism B. a container transfer mechanism; a container unloading mechanism E for unloading the container 1 with the film lid 4 attached;
The container 1 is provided with a film supply mechanism F that supplies a strip film 76 onto the flanges 2.3 on the four sides of the container 1.

Next, each mechanism is separated and removed according to FIGS. 4 to 6.

About the first seal mechanism A A front mounting plate 10 is erected at the front end of the lifting platform 9.

Behind this front mounting plate 10, on the lifting platform 9 is a movable platform 1.
1 is supported so as to be movable in the front-rear direction, and a rear mounting plate 12 is erected on this movable base 11 so as to face the front mounting plate 10. When the lifting platform 9 moves upward, both the front and rear mounting plates 10, 12 also move up and down.

Rotating shafts 14.15 that rotate in conjunction with each other are supported between the front and rear ends of the left and right machine frames 13, and between the left and right ends of the front and rear rotation shafts 14.15, Both front and rear ends of the support plate 16 are screwed together. The left and right support plates 16 move in the left and right directions along the same axis 14.15 by rotation of the front and rear rotation wheels 14.15, and can move toward and away 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 lifting platform 9, and a movable plate 8 is supported on the fixed plate 17 so as to be movable in the front and rear directions along a long hole 19. There is. Between the front and rear mounting plates 10° 12, both left and right mounting plates 20 and 21 are erected at the tips of the left and right rotation plates 17 and the left and right rotation plates 18, respectively. Then, when the left and right support plates 16 approach and separate from each other, the left and right rotation plates 17 and the left and right rotation plates 18 move in the left and right direction,
The mounting plates 20 of both the left and right rotating plates 17 and the mounting plates 21 of both the left and right rotating plates 18 move toward and away from each other along both the front and rear mounting plates 10 and 12.

When the rear mounting plate 12 moves in the front and back direction, both the left and right rotating plates 1
8 also moves in the front and rear directions. The shape of the mounting space 22 created inside the front and rear mounting plates 10.12 and the left and right mounting plates 20, 21 is square when viewed from above, and between the front and rear rotation axes 10.12. Spacing and left and right mounting plates 20, 2
The size of this mounting space 22 can be changed by changing the interval between the two.

An air cylinder 24 is attached to a mounting plate 23 installed between the left and right machine frames 13 above the front mounting plate 10,
A front heating plate 25 as a sealing member is attached to the piston rod 24a so as to face the front mounting plate 10. When the piston rod 24a moves up and down, the front heating plate 25 can come into contact with or separate from the ship mounting plate 10.

An air cylinder (not shown) is attached to a mounting member 27 attached to the connecting plate 26 above the rear mounting plate 12, and a post heating plate 29 as a sealing member is attached to the piston rod 28 of the rear mounting plate 12. It is mounted opposite to. When the piston rod 28 moves up and down, the post-heating plate 29 can come into contact with or separate from the post-mounting plate 12.

A male threaded rod 30 is rotatably supported on the mounting member 27, and a mounting plate 32 is attached to a female threaded cylinder 31 screwed onto the male threaded rod 30. An air cylinder (not shown) is attached to this mounting plate 32, and a knife 34 is attached to the mounting plate 32.
is rotatably supported via a link 35. The piston rod 33 of this air cylinder is interlocked with this link 35, and due to this interlocking, the knife 34 can be rotated in an arc in the left and right direction slightly behind the rear mounting plate 12. A knob 30a is provided on the male threaded rod 30,
When the knob 30a is rotated, the mounting plate 32, the piston rod 33 of the air cylinder,
The knife 34, link 35, etc. can move back and forth along the male threaded 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, knife 34, etc. attached thereto can move in the front-rear direction. After this, the rear heating plate 29 and the rear mounting plate 12 simultaneously move in the front and back direction and always face each other.

Regarding the second seal mechanism B, a support frame 37 is supported by both left and right fixing rails 36 attached to the left and right inner machine frames 13 so as to be movable in the front-back direction. The connecting plate 26 of the first seal mechanism A is attached to the front side of this support frame 37, and the mounting member 27 of the first seal 1111A is movable in the front and rear direction together with the support frame 37 via this connecting plate 26. There is. Inside this support frame 37, left and right mounting plates 38 are supported so as to be movable in the left and right direction, and can be moved toward and away from each other. An air cylinder 39 is attached to the lower side of the left and right mounting plates 38, and its piston rod 3
Both left and right heating plates 40 as sealing members are attached to 9a.

At the bottom of the left and right mounting plates 38, a mounting rail 41 is connected to the connecting plate 4.
It is attached via 2. This left and right mounting rail 41
extends 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 a guide groove 43 extending in the front-rear direction is formed between the left and right mounting rails 41.

A frame plate 45 is attached to the connecting plate 44 attached to the lower side of the support frame 37 below both 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 conveyor chain 46 is supported by both the left and right frame plates 45, and a plurality of feed rods 47 are installed 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 this connecting plate 48 is supported by the left and right support plates 16 of the first sealing mechanism A so as to be movable in the front-back direction. .

Then, when the left and right support plates 16 move in the left-right direction and approach and separate from each other, the left and right mounting plates 38 and the air cylinders 39, heating plates 40, mounting rails 41, etc. attached thereto move in the left-right direction. , both the left and right heating plates 40 and both the left and right mounting rails 41 are moved closer and farther away from each other so that their spacing can be changed. Further, when the support frame 37 moves in the front-rear direction, the left and right mounting plates 38, the air cylinder 39, the heating plate 40, the mounting rail 41, the left and right frame plates 45, etc. that are attached thereto can move in the front-rear direction. It has become.

Both the left and right frame plates 45 are the rear mounting plates 12 for the first sealing mechanism.
The rear mounting plate 12 is connected to the connecting rod 49 via a connecting rod 49, and the rear mounting plate 12 can move up and down with respect to this connecting rod 49. and,
When the frame plate 45 moves in the front-rear direction, the rear mounting plate 12 can also move in the front-rear direction via the connecting rod 49.

Concerning the container supply mechanism C, rotating shafts 51° 13-14-52 are installed on both the front and rear sides between the left and right machine frames 50, and the front and rear ends of the movable member 53 are mounted on both the left and right sides of the front and rear rotation shafts 51,52. They are screwed together. A mounting plate 54 is attached to both the left and right rotating members 53, and a guide groove 55 extending in the front-rear direction is formed between the inner edges 54a of the left and right mounting plates 54. And both front and rear rotation axes 5
1.52 rotates, the left and right rotating members 53 move in the left and right directions, and the left and right mounting plates 54 approach and separate from each other, so that the distance between their inner edges 54a can be changed.

A first chain 56 is supported between the front and rear ends of the left and right frames 50, and a plurality of feed rods 57 are installed between the left and right box-chains 56.

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

Concerning the container transfer mechanism, guide rails 60 are attached to the left and right frames 13 on both the left and right sides of the first sealing mechanism A, and a support stand 61 is supported so as to be movable in the front and back direction along the guide rails 60. There is. A rotary belt 62 is supported on the both sides frame 13, and a support stand 61 is connected to this rotary belt 62.

A base plate 63 is supported on the support base 61 so as to be movable in the left-right direction, and a pair of air cylinders 64 and 65 are mounted on the base plate 63. This base plate 63 is the support plate 1
6 via a connecting plate 66 so as to be movable in the front-back 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 biasing force of a spring 69. It is open to the grip plate 67. This movable grip plate 68 is connected to the piston end 65a of the other air cylinder 65, and can be opened and closed relative to the fixed grip plate 67 by the protrusion and retraction of this piston rod 65a.

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

When the piston rod 64a of one air cylinder 64 protrudes, the leading edges of the fixed gripping plate 67 and the movable gripping plate 68 align with both the left and right mounting plates 20, 21 of the first seal mechanism Δ. When the left and right support plates 16 approach and separate, the base plate 63 and the air cylinders 6 attached thereto
4.65 and both the upper and lower gripping plates 67.68 move in the left-right direction, and the left and right upper and lower gripping plates 67.68 move toward and away from each other at the same time as the left and right mounting plates 20.21 to change their spacing. It looks like this. Further, when the belt 62 rotates, the support base 61 moves in the front-back direction along the guide rail 60, and the base plate 63, both air cylinders 64, 65, both upper and lower grip plates 67, 68, etc. move in the front-back direction. This back and forth movement causes the upper and lower grip plates 67.68 to reciprocate between the left and right mounting plates 20.21 and the front ends of the left and right mounting rails 41 of the second seal mechanism B. .

Regarding the container unloading mechanism E, this mechanism E is also used in the second sealing mechanism B by the left and right mounting rails 41, the guide groove 43, the left and right frame plates 45, the left and right conveyance chains 46, and the feed rods 47. Both left and right unloading rails 70 are connected to both mounting rails 41 .

Regarding the film supply mechanism F, a support rod 71 is rotatably supported on the machine frame 13 above the second sealing mechanism B, and a band brake 72 is attached to the support rod 71.

A tension lever 73 as a tension applying member is rotatably supported on the machine frame 13 below the support rod 71, and an air cylinder 74 is attached to the machine frame 13. It is possible to come into contact with. The film take-up roll 75 is fitted into the support rod 71, and the strip-shaped film 76 pulled out from there is passed through the guide roller 73a of the tension lever 73 and each guide roller 77 attached to the machine frame 13 to the first sealing mechanism A. guided by.

A pair of left and right brackets 78 are provided on the front side of the connecting plate 42 extending downward from the left and right claw plates 38 of the second sealing mechanism B, and extend toward the first sealing mechanism A. An air cylinder 79 is attached to. A presser member 80 is attached to the piston rod 79a of the air cylinder 79, and the presser member 80 can come into contact with or separate from the left and right reloading rails 41 as the piston door 9a moves up and down. There is.

The left and right air cylinders 79 move as the left and right mounting plates 38 of the second seal mechanism B move back and forth, and also move in the left and right direction as the claw plate 38 moves left and right, thereby increasing the distance between the left and right presser members 80. can be changed.

Next, the operation of the apparatus configured as described above will be described in detail with reference to FIGS. 7 to 9.

First, in accordance with the longitudinal and lateral widths of the flanges 2 and 3 of the container 1, the left and right support plates 16 are adjusted to move in the left and right directions along the longitudinal rotation axes 14 and 15, and the support frame 37 is moved to the fixed rail. 36 in the front-back direction. By this adjustment, in the first sealing mechanism A, the distance between the front and rear mounting plates 10.12 in the front-rear direction, the distance between the left and right mounting plates 20.21 in the left-right direction, the distance between the front and rear heating plates 25.29 in the front-rear direction, The positions of the knives 34 in the front and rear directions are respectively determined.

Note that the position of the knife 34 can be adjusted by turning the knob 30a. In the second sealing mechanism B, left and right reheating plates 40,
The longitudinal positions of the left and right remounting rails 41 and both the left and right frame plates 45, the lateral spacing between the left and right reheating plates 40, and the lateral spacing of the left and right remounting rails 41 are determined, respectively. In the container supply mechanism C, the distance between the left and right mounting plates 54 in the left and right direction is determined.

In the container transfer mechanism, both the left and right upper and lower gripping plates 67.
68 in the longitudinal direction and the intervals therebetween in the lateral direction are determined. In the container unloading mechanism E, the longitudinal positions of the left and right reloading rails 41 of the second sealing mechanism B, the intervals therebetween in the left and right direction, and the longitudinal positions of both the left and right frame plates 45 are determined, respectively. In the film supply mechanism F, the positions of the left and right pressing members 80 in the front-rear direction and the intervals therebetween in the left-right direction are determined, respectively.

After adjusting each mechanism A to F in this manner, the apparatus is operated.

Figures 7(a'') to (j) show the action of the first cycle.In the initial state shown in Figure 7(a'), in the first sealing mechanism A, the lifting table 9 moves up and back and forth. Both mounting plates 10
, 12 are in the upward movement position, and both the front and rear heating plates 25.
29 and knife 34 are in the raised position. In the second sealing mechanism B, the left and right reheating plates 40 are in the upward movement position. In the container supply mechanism C, the first container 1a and the second container 1b are inserted into the guide groove 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 machine 41IID, both gripping plates 67
．． 68 are in the first sealing mechanism A in a closed state. In the film supply mechanism F, the strip film 76 is pulled out from the film take-up roll 75 and held by the first sealing mechanism A between both grip plates 67 and 68 of the container transfer mechanism, and the strip brake 72 is applied to the support rod 71. This prevents the film strip 76 from being pulled out any further from the film take-up roll 75, and the tension lever 73 is in a free state to apply a light tension to the film strip 76. Further, both the left and right pressing members 80 are in the upward movement position.

When this device is operated, as shown in FIG. 7(b),
Both chains 56 and 58 of the container supply mechanism C rotate, and the containers 1a and 1b are moved by both feed rods 57. b9 and transported to the first sealing mechanism A, and the first sealing mechanism A
The lifting platform 9 moves down, and both the front and rear mounting plates 10, 12 move down.

As shown in FIG. 7(C), since the conveyance speed of the first container 1a is faster than the conveyance speed of the second container 1b, the first container 1a gradually moves away from the second container 1b and moves to the first container. This leads to seal mechanism A. Then, the band brake 72 of the film supply mechanism F is released, and both grip plates 67 and 68 of the container transfer mechanism are moved to the left and right reloading rails 41 of the second sealing mechanism B.
The strip film 76 is moved to the film winding roll 75.
drawn from.

21 22- As shown in FIG. 7(d), both the left and right flanges 3 of the first container 1a are connected to the left and right mounting plates 20, 2 of the first sealing mechanism A.
1, the holding plates 67 and 68 of the container transfer mechanism stop on both the left and right mounting rails 41 of the second sealing mechanism B, and the band brake 72 of the film feeder 41SF operates to wind the film. Rotation of roll 75 is prevented. The strip film 76 is attached to the flanges 2. on the four sides of the first container 1a.
3 is assigned above.

Next, as shown in FIG. 7(e), the left and right holding members 80 of the film supply mechanism F move downward to clamp the strip film 76 between the left and right mounting rails 41.

As shown in FIG. 7(f), when the tension lever 73 of the film supply mechanism F is pushed downward by the piston door 4a of the air cylinder 74, tension is applied to the strip film 76.

Next, as shown in FIG. 7(g), both gripping plates 67 and 68 of the container transfer mechanism release gripping of the strip film 76.

23- Then, as shown in FIG. 7(h), both the front and rear mounting plates 10.12 of the first sealing mechanism A move upward, and the front and front heating plates 25.29 move downward, so that the first Both the front and rear flanges 2 of the container 1a and the band-shaped film 76 thereon are placed on the front and rear mounting plates 10. , 12, and a band-shaped film 76 is heat-sealed onto both the front and rear flanges 2. At this time, both the left and right pressing members 80 of the film supply mechanism F move upward to release the pressure on the strip film 76, and at the same time, the tension lever 73 of the same mechanism F is released.

During this heat sealing, the knife 34 also moves downward, as shown in FIG. 7(i), and the strip film 76 is cut. At this time, both gripping plates 67 and 68 of the container transfer mechanism begin to return into the first sealing mechanism A.

Thereafter, as shown in FIG. 7(j), the front and rear heating plates 25, 29 and knife 34 of the first sealing mechanism A move upward. The second container 1b reaches 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 FIG. 8(a) 24-24-(j). Ru.

Both the left and right flanges 3 of the first container 1a placed on each mounting plate 10, 12, 20° 21 of the first sealing mechanism A and the band-shaped film 76 thereon are connected to both gripping plates 67 of the container transfer mechanism. It is gripped by .68.

Figures 8 (a) to (j) showing the effects of the second cycle are similar to Figures 7 (a) to (j) showing the effects of the first cycle.
), but this second cycle differs from the first cycle in the following points. That is, in this second cycle, as shown in FIGS. 8(b), 8(c), and 8(d), after the first container 1a is heated and sealed by the first sealing mechanism A, the first container 1a is heated and sealed by both gripping plates of the container transfer mechanism. 67 and 68, it is transported to the guide groove 43 of the second sealing mechanism B, and its left and right flanges 3 are placed on the left and right mounting rails 41, where the rear flange 2 of the second container 1a and the band-like shape thereon are The film 76 is held between the left and right mounting rails 41 by the left and right holding members 80 of the film supply mechanism F, as shown in FIGS. 8(e) to (1).

After the heat sealing treatment shown in FIG. 8(h),
As shown in Figures (i) and (j), the strip film 76
is cut by the knife 34 to form the first container 1a as shown in FIG.
The state shown in b) is reached.

The effects of the third cycle shown in FIGS. 9(a) to (j) are also the same as those of the first cycle shown in FIGS. 7(a) to (j).
) and Figure 8 <a> to (
j), but this third cycle differs from the first and second cycles in the following points. That is,
In this third cycle, as shown in FIGS. 9(h) and (i), the first container 1a is pushed by the feed rod 47 of the second sealing mechanism B and reaches below the left and right phase heating plate 40. Both phase hot plate 4
0 moves downward, and both the left and right flanges 3 of the first container 1a and the film 76 thereon are sandwiched between the left and right mounting rails 41, and the film 76 is heat-sealed on both the left and right flanges 3. The state shown in FIG. 3(C) is reached.

The second container 1b, first container 1C, and fourth container 1d following this first container 1a are also heat-sealed in sequence in the same manner as the first container 125 26-a.

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 is sent from the left and right reloading rails 41 onto the left and right discharge rails 70. This 4
The effect of the 3rd cycle is the same as that of the 3rd cycle.

In particular, in this embodiment, since the heat sealing process is divided into two stages: a case using the first sealing mechanism A and a case using the second sealing mechanism B, the flanges 2 and 3 on the four sides of the container 1
Of these, the seal portion 6 formed on the flange 2 on one of the two opposing sides, and the seal portion 7 formed on the flange 3 on the other two opposing sides are the four corner portions 8 of the flanges 2 and 3 on the four sides. can be polymerized with each other. Therefore, double seals 6 and 7 are formed, and the bond between the container 1 and the film lid 4 becomes strong, and the film lid 4 becomes difficult to peel off from the container 1.

Also, depending on the size of the container 1, the intervals between the front, rear, left, and right mounting plates 10, 12, 20, 21 of the first sealing mechanism A, the intervals between the front and rear heating plates 25, 29, and the left and right rear of the second sealing mechanism B may be adjusted. Since the spacing between the mounting rails 41 and the spacing between the left and right heating plates 40, etc. change, the prior art described above requires replacing the lower mold and the heat sealing upper mold for each container. This is very effective in terms of work efficiency.

Effects of the Invention According to the present invention, by dividing the heat sealing process into two stages, it is possible to form double seals 6 and 7 at the four corners 8 of the flanges 2° 3 on the four sides of the container 1. , the bond between the container 1 and the film lid 4 becomes strong, and the film lid 4 becomes difficult to peel off from the container 1.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a state in which a film lid is attached to a container, Fig. 2 is a perspective view showing a container, and Figs. 3 (a), (b) (
C) is a plan view showing the procedure for heat-sealing a film lid to a container, FIG. 4 is a side sectional view showing the device, FIG. 5 is a partially cutaway plan view, and FIG. 6 mainly shows the container transfer mechanism. Figures 7(a) to (j) are explanatory diagrams showing the operation of the first cycle of this device, and Figures 8(a') to (j) are partial cross-sectional views of the second cycle of this device. Explanatory diagram showing the action, Figure 9 (a) ~
(j) is an explanatory diagram showing the operation of the third cycle of the present device. 1.18-1d...container, 2...both front and rear flanges,
3... Both left and right flanges, 4... Film lid, 5...
・Opening, 6... Sealing portion of both front and rear flanges 2, 7...
・Seal parts of both left and right flanges 3, 8...Four corners, A・
...First seal mechanism, 10... Front mounting plate (mounting member)
, 12... Rear mounting plate (mounting member), 20.21...
Both left and right mounting plates, 25... Front heating plate (sealing member), 2
9... Post-heating plate (sealing member), 34... Knife,
B...Second seal mechanism, 40...Left and right heating plates (sealing members), 41...Right and left reloading rails (placing members)
, 45... Left and right frame plates, C... Container supply mechanism, 54
...Both left and right mounting plates, D...Container transfer mechanism, 67.6
8...Gripping plate (gripping member), E...Container delivery mechanism,
F...Film supply mechanism, 71...Support rod (support part), 72...Band brake, 73...Tension lever as a tension applying member 74...Air cylinder as a tension applying member , 75... Film winding roll, 76... Band-shaped film, 80... Left and right pressing members.

Claims (1)

[Claims] 1. Of the four-sided flanges (2, 3) formed on the outer periphery of the upper end of the container (1), one of the two opposing flanges (
2) Seal the film lid (4) on top, and seal the same film lid (4) on the other opposing flanges (3).
4), overlap the two sealed parts (6) and (7) with each other at the four corners (8) of the container (1), and open the openings (5) inside the flanges (2, 3) on the four sides. Film lid (4
) A container with a film lid, characterized in that it is occluded by. 2. First, place the film (76) on the flanges (2, 3) on the four sides formed on the outer periphery of the upper end of the container (1), then place the film (76) on the flanges (2, 3) on the four sides of the container (1). ,
A film (
76), and next, among the flanges (2, 3) on the four sides of the container (1),
A film (
76), and seal both the sealed parts (6) (7) at the four corners (8) of the container (1).
) are polymerized with each other and the openings (5) on the inside of the flanges (2, 3) on the four sides are closed with a film (76). 3. Paste the film lid (4) on the four side flanges (2, 3) formed on the outer periphery of the upper end of the container (1) and close the opening (5) on the inside of the flanges (2, 3). In an apparatus for attaching a film lid to a container, a mounting member (10, 12) and flanges (2, 3) of the same container (1).
) sealing members (25, 29) for sealing the film (76) placed on the flanges (2) on the two opposite sides;
), and a mounting member that supports the lower side of the flange (3) on the other two opposing sides of the flanges (2, 3) on the four sides of the container (1). (41), and a sealing member (40) for sealing the film (76) placed on the flanges (2, 3) of the container (1) onto the flanges (3) on the two opposing sides. A device for attaching a film lid to a container, characterized by comprising a second sealing mechanism (B).