JPH052402Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> The present invention involves wrapping a packaging film around a cylindrical body for bag making, forming it into a tube shape, and suspending the packaging film from the cylindrical body for bag making. As the clamp installed on the side closes, the filling of the packaged material from the bag-making cylinder to the bag body is stopped, and as the horizontal sealing machine closes, the tube-shaped film is heat-sealed in the width direction. The present invention relates to a bag-forming-fill-sealing machine that seals the top opening of a preceding bag and the bottom opening of a subsequent bag, and cuts the gap between these sealed portions by protruding a cutter.

<Prior Art> Conventionally, this type of bag-forming-filling-sealing machine has been equipped with a pair of clamps that can be opened and closed in a direction perpendicular to the film feeding direction, as disclosed in, for example, Japanese Patent Application Laid-Open No. 59-163110. A pair of horizontal sealing machines are installed downstream of this in the film feeding direction and are movable to open and close in the same direction as the opening and closing movement of both clamps. The upper opening of the preceding bag, which has been closed and the filling of the packaged material has been completed, and the bottom opening of the following bag are sealed by heat sealing, and then the space between these two sealed parts is sealed. The preceding bag body is cut by a cutter and dropped, and then both side sealing machines are opened and at the same time, cooling air is blown out from both clamps to cool only the bottom opening seal portion of the following bag body.
After this cooling has finished, open both clamps and
In some cases, the items to be packaged upstream from the clamp are dropped and filled into the following bag.

<Problem to be solved by the invention> However, in such a conventional bag-fill-fill-seal machine, the upper opening of the preceding bag is cut immediately after heat sealing and falls without being cooled. There is a problem in that if the opening is incompletely heat-sealed, the incompletely heat-sealed upper opening may open again due to a shock when the bag is dropped, and as a result, the packaged item may come out of the heat-sealed bag.

Therefore, in order to prevent this, immediately after heat-sealing the top opening of the preceding bag and the bottom opening of the following bag, cooling air is sprayed onto both seals to cool them respectively. It is possible to cut it.

However, in this case, the cooling air blown toward both seals may interfere with each other, which may cause the cooling air to accumulate in each seal and flow back toward the cooling air outlet. There is a problem that new cooling air cannot be sprayed sequentially, resulting in poor cooling efficiency.

In view of such conventional circumstances, the present invention aims to spray cooling air onto both seal portions without interfering with each other.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to provide a pair of presser plates facing the receiving surface of the horizontal sealing machine and spaced apart in the film feeding direction, and a cutter. A clamp consisting of a pair of film cutting press plates sandwiching the protruding position is provided so that it can be opened and closed in a direction perpendicular to the film feeding direction, and a cooling air outlet is opened in this clamp toward both seal parts. , a seal block of the horizontal sealing machine is positioned between both holding plates so as to be reciprocally movable in the same direction as the opening/closing direction of the clamp, and the film cutting holding plate is fitted between both sealing surfaces of the seal block. A fitting recess is formed in the seal block, and when the seal block moves away from the receiving surface, an air escape passage is formed between the fitting recess and the closed film cutting press plate. That is.

<Function> According to the above-mentioned technical means, the present invention provides that after the receiving surface and the clamp of the horizontal sealing machine are closed, the sealing block of the horizontal sealing machine protrudes toward the receiving surface and opens the upper opening of the bag body. By heat sealing the bottom opening of the bag following the seal block and blowing cooling air from the clamp toward both seals after the seal block has separated from the receiving surface, both seals are cooled and the air is It is discharged outside the horizontal sealing machine through the escape passage, and then the cutter protrudes and cuts the space between the two seals held down by the film cutting presser plate, and then the receiving surface of the horizontal sealing machine and the clamp are opened. In some cases, the items to be packaged on the upstream side of the clamp are dropped and filled into the bag.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In this embodiment, as shown in FIG. 1, a packaging film E is wrapped around a cylindrical bag-making body D to form a tube shape and hang downward, and a sealing block is inserted from an intermediate position between the upper and lower sides of the receiving surface B of the horizontal sealing machine A. A cutter C is disposed between the upper and lower sealing surfaces 2c, 2c of 2 so as to be freely retractable, and the tube-shaped film E is heat-sealed in the upper and lower two places in parallel in the width direction. the upper opening of the bag body E ₂ ,
The bottom opening of the bag E ₁ that follows this is sealed, and the cutter C is projected between the seal portions E ₃ and E ₄ to cut and separate the bags.

The receiving surface B of the horizontal sealing machine A is sandwiched between the tube-like film E hanging below the bag-making cylinder D.
A clamp 1 is provided at a position facing the film so as to be movable in the left and right directions in FIG. 1, perpendicular to the film feeding direction.

The clamp 1 has sliders 1a, 1a arranged in series at both ends in the front and back direction perpendicular to the opening/closing direction, and a pair of upper and lower presser plates 1 are installed between the sliders 1a, 1a.
b, 1b are placed horizontally facing the upper and lower ends of the receiving surface B, respectively, and between these presser plates 1b, 1b, a pair of upper and lower film cutting presser plates 1c,
1c is installed horizontally so that its protruding position is sandwiched slightly above and below the opposing height position of the cutter C.

The presser plate 1b is formed in the shape of a horizontal strip whose front and rear width dimensions are longer than the width dimension of the tube-shaped film E;
The surface facing the receiving surface B is formed into a vertical plane, and a cooling air supply path _1b1 is vertically provided on the surface facing the film cutting press plate 1c over the entire length in the front and back direction. , the supply path 1b ₁ includes a bag body.
A large number of air outlets 1b ₂ ... are opened at appropriate intervals in the front and back direction toward the seal portions E ₃ and E _{4 of} E 1 _and E 2, and compressed air for cooling is sent to the supply path 1b ₁ . Seal part
E ₃ and E ₄ are sprayed to cool the seal portions E ₃ and E ₄ and the holding plate 1b itself.

The film cutting press plate 1c is the same as the above press plate 1b.
The cooling air supply passage 1c ₁ is formed horizontally over the entire length in the front and rear direction on the receiving surface B side, and the supply passage 1c ₁
For this purpose, a large number of air outlets 1c ₂ ... are opened at appropriate intervals in the front and back direction toward the sealed portions E ₃ and E ₄ of the bags E ₁ and E ₂ , and cooling air is blown into the supply path 1c ₁ . Spray compressed air constantly or temporarily onto the seals E ₃ and E ₄ .

In addition, the air outlet 1b ₂ ...1 of the above-mentioned both presser plates 1b, 1c
The cooling efficiency is improved by opening the holes as close to perpendicular as possible toward the seal portions E ₃ and E _{4 ,} respectively.

Also, the presser plate 1b of the film cutting presser plate 1c
The side surface is sloped so that the wall thickness gradually decreases as it goes in a direction away from the receiving surface B side.

A pair of support rods F, F, which are horizontally suspended in the front-rear direction, are slidably attached to the sliders 1a, 1a, which clamp and fix the press plates 1b, 1b and the film cutting press plates 1c, 1c, respectively. The entire clamp 1 is supported on these support rods F and F so that it can reciprocate in the opening and closing directions.

Furthermore, between these sliders 1a, 1a, presser plates 1b, 1b and film cutting presser plates 1c,
Mounting plate 1d is located further away from receiving surface B than 1c.
is clamped and fixed in the front-rear direction, and an air cylinder 1e is arranged on the side of the receiving surface B of the mounting plate 1d,
A seal block 2 is connected to the output end of the air cylinder 1e so as to be able to reciprocate in the opening/closing direction.

In the illustrated example, a pair of front and rear air cylinders 1e, 1e are arranged side by side on the side surface of the receiving surface B of the mounting plate 1d,
At the output ends _{of these air cylinders 1e, 1e, operating rods 1d2 , 1d2} are horizontally installed via sliders 1d1 so as to be able to reciprocate in the opening/closing directions, and the operating rods 1
A seal block 2 is connected to the side surface of the receiving surface B of d ₂ and 1 d ₂ .

The seal block 2 is formed into a substantially rectangular cross-section with substantially the same front-to-back width as the presser plate 1b, and has a plurality of heaters 2a disposed therein over the entire length in the front-back direction, and has a surface facing the receiving surface B. A pair of protrusions 2b, 2b having a mountain-shaped cross section are formed integrally over the entire length in the front-rear direction at appropriate intervals above and below, and the tips of these protrusions 2b, 2b are provided with a vertical sealing surface 2c,
2c are formed on the same plane in the vertical direction. These sealing surfaces 2c, 2c have Teflon sheets 2
d and 2d to prevent the melted portions of the bags E ₁ and E ₂ from adhering to the sealing surfaces 2c and 2c during heat sealing.

Note that the Teflon sheet 2d does not necessarily have to be attached.

Further, between the protrusions 2b, 2b is a fitting recess 2e into which the film cutting press plates 1c, 1c fit when the seal block 2 protrudes toward the receiving surface B side.
When the seal block 2 moves in the direction away from the receiving surface B, air escape passages 2f, 2f are formed between the fitting recess 2e and the closed film cutting press plates 1c, 1c, respectively. Form.

On the other hand, the receiving surface B is formed to have a rectangular cross-section with the same front and rear width dimensions as the holding plate 1b, and therein there are supply channels for peeling air at positions facing the upper and lower sealing surfaces 2c, 2c of the seal block 2, respectively. _B1 ,
_B1 is formed horizontally over its entire length in the front and back direction, and a receiving plate _B2 is fixed to the surface facing the clamp 1 and seal block 2 over its entire surface.

The receiving plate B ₂ is made of an elastic material such as silicone rubber and has a flat plate shape having the same shape as the receiving surface B, and has a large number of air outlets B ₂₁ . Two stages are penetrated approximately horizontally at appropriate intervals in the front-rear direction, and communicated with the stripping air supply path B ₁ , whereby the compressed stripping air supplied to the supply channel B ₁ is supplied. bag body
Spray on the top and bottom of the seal parts E ₃ and E ₄ of E ₁ and E ₂ , respectively.

Air relief grooves B ₂₂ are provided at the upper and lower ends of the receiving plate B ₂ .
are horizontally recessed over the entire length in the front and rear direction, and a large number of vertical recesses are continuously formed toward the upper and lower edges.

In addition, supporting rods F, F are slidably inserted into the front and rear ends of the receiving surface B, respectively, so as to be able to reciprocate in the opening and closing directions of the clamp 1. It is supported on F so that it can reciprocate in the opening and closing directions.

And, on these clamps 1 and receiving surface B,
One end of the operating rod G ₁ , G ₂ is connected to the front and rear ends thereof, and the other end of the operating rod G ₁ , G ₂ is connected to opposite ends of a rotary plate H supported rotatably in the vertical direction, By rotating the rotary plate H with the air cylinder 1, the clamp 1 is activated via the operating rods _G1 and _G2 .
and receiving surface B are moved toward and away from each other in synchronization.

Further, on the end face of the clamp 1 on the side of the bag-making cylinder D, that is, the upper surface of the upper presser plate 1b, and on the end face of the receiving surface B on the side of the bag-making cylinder D, that is, the upper surface, a pair of object receivers 3a, 3b are provided. are provided integrally with each other.

Both packaged object receivers 3a and 3b are plate members that slope diagonally downward toward the tube-shaped film E, and are provided with fixing means _3a , such as bolts, over approximately the entire length of the upper holding plate 1b and the receiving surface B in the front-rear direction. , 3b ₁ , and in this embodiment, cushioning materials 3a ₂ and 3b ₂ such as rubber are attached to the upper surface of each, and the upper surface of the upper holding plate 1b, the upper surface of the receiving surface B, and the upper surface of the receiving plate B ₂ are fixed. By making the cushioning materials 3a ₂ and 3b ₂ incline in the same plane as the upper surfaces thereof, the clamp 1 and the receiving surface B form a perfect V-shape when the clamp 1 and the receiving surface B are closed.

In this embodiment, a pair of pressing members 4a and 4b for air removal made of, for example, sponge are disposed on the lower surface of the lower presser plate 1b and the lower surface of the receiving surface B, respectively, so as to face each other.

Next, the operation of the horizontal sealing device of such a bag making, filling and packaging machine will be explained.

First, in the initial state, the seal block 2 is apart from the receiving surface B, and when the clamp 1 and the receiving surface B are moved close to each other and closed, the holding plates 1b, 1b, the film cutting holding plates 1c, 1c, and the receiving plate B are moved. In ₂ ,
Firmly pinch the tube-like film E.

In this state, when the article to be packaged starts to be supplied from the cylindrical body D for bag making, the article to be packaged is filled into the tube-shaped film E on the upstream side of the article receivers 3a and 3b. Since E ₁ is pulled upstream and the bag E ₂ is pulled downstream, there is a risk that the melted part will be stretched during sealing.
This is prevented by b and 1b.

Furthermore, at this time, the preceding bag _E2 , which has been filled with the object to be packaged, is pinched and pressed by the pressing members 4a and 4b, and the air that has entered into this bag _E2 is expelled to the upstream side.

When the clamp 1 and the receiving surface B close or after the closing movement is completed, the seal block 2 protrudes toward the receiving surface B, and after the clamp 1 stops protruding, the sealing surfaces 2c and 2c and the receiving plate B ₂ and heat-seal the tube-shaped film E in the width direction to open the upper opening of the preceding bag body E ₂ and the following bag body.
Seal the bottom opening of E ₁ at the same time.

At this time, the air accumulated in these seal portions E ₃ and E ₄ escapes to the bags E ₁ and E ₂ through the relief grooves 3b on the surface of the receiving plate 3.

When this is completed, only the seal block 2 moves in the direction away from the receiving surface B, and at the time of this movement or at the end of the movement, the air outlets 1b ₂ of the presser plates 1b, 1b, and the air outlets 1c of the film cutting presser plates 1c, 1c. ₂ ...
, spray cooling air toward the seal parts E ₃ , E ₄ and both seal parts E ₃ , E ₄ and both presser plates 1b,
1b, 1c, and 1c are cooled.

At this time, the cooling air blown toward the seal portions E ₃ and E ₄ is released by the movement of the seal block 2, which is created between the fitting recess 2e and the closed film cutting press plates 1c and 1c. aisle 2
The cooling air is discharged to the outside of the horizontal sealing machine A through f and 2f, and the cooling air accumulates in the sealing parts E ₃ and E ₄ and is discharged from the air outlet 1.
There is no backflow to the b ₂ ...1 c ₂ ... side, and new cooling air can be sequentially sprayed, improving cooling efficiency.

Also, at this time, peeling air is sprayed from the air outlet B ₂₁ of the receiving plate B ₂ onto the top and bottom of the seal parts E ₃ and E ₄ , and the seal parts stuck to the surface of the receiving plate B ₂ are removed.
E ₃ and E ₄ are peeled off, and this peeling air is discharged to the outside of the receiving surface B through the relief groove B ₂₂ . Surface 2c, 2
Try not to bulge out to the c side.

After cutting and separating the bags E ₁ and E ₂ held by the film cutting press plates 1c and 1c by the protrusion of the cutter C, the clamp 1 and the receiving surface B are separated from each other and opened. Packaged object receiver 3a,
The packaged items on 3b fall to the bottom of bag _E1 ,
Thereafter, the tube-shaped film E is fed out for a predetermined length via the bag-making cylinder D, and the above operation is repeated.

Therefore, in this embodiment, _a large number of cooling air outlets 1b ₂ ... 1c ₂ ... are opened in the clamp 1 toward the seal portions E ₃ and E ₄ of the bags E 1 and E ₂ So,
Air outlet _{1b 2} ... 1 is provided in the seal parts E ₃ and E ₄ of the bags E ₁ and E 2
The cooling air can be blown out when c ₂ ... are close to each other, and the seal parts E ₃ and E ₄ can be completely and quickly cooled without blowing out a large amount of cooling air under strong pressure.

In the illustrated example, the heaters B ₃ and B ₃ are disposed inside the receiving surface B over the entire length in the front and back direction, but the heaters B ₃ and B ₃ are not limited to this.
It is not necessary to decorate the interior.

In this case, the stripping air can also be used for cooling.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

After closing the receiving surface and clamp of the horizontal sealing machine, the sealing block of the horizontal sealing machine protrudes toward the receiving surface and heat-seals the top opening of the bag and the bottom opening of the bag that follows. After the block is separated from the receiving surface, cooling air is blown from the clamp toward both seals, thereby cooling both seals and at the same time exhausting the air to the outside of the horizontal sealing machine through the air release passage.
After that, the cutter protrudes and cuts the space between the two seals held down by the film cutting presser plate, and then the receiving surface of the horizontal sealing machine and the clamp are opened, and the packaged items upstream from the clamp are cut into the bag. Since the cooling air is dropped and filled, cooling air can be sprayed onto both seals without interfering with each other.

Therefore, compared to the case where the top opening of the preceding bag body and the bottom opening of the following bag body are heat-sealed, cooling air is sprayed onto both sealed parts to cool each part before cutting. The cooling air does not accumulate in each seal portion and flow back to the cooling air outlet side, and new cooling air can be sequentially sprayed, improving cooling efficiency.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a bag making, filling and packaging machine showing an embodiment of the present invention, showing the state after heat sealing;
The figure is a reduced plan view with a part cut away, and Figure 3 is a partially enlarged vertical sectional side view taken along the - line in Figure 2.
FIG. 4 is a longitudinal sectional front view showing the state of the packing object when it is filled. A...Horizontal sealing machine, B...Receiving surface, C...Cutter, D...Bag making cylinder, E...Packaging film, _E1 ...Following bag body, _E2 ...Preceding bag body ,
E ₃ ... Seal part, E ₄ ... Seal part, 1 ... Clamp, 1b ... Holding plate, 1b ₂ ... Air outlet, 1c ...
...Press plate for film cutting, 1c ₂ ...Air outlet, 2...
...Seal block, 2c...Seal surface, 2e...
Fitting recess, 2f...Air escape passage.

Claims (1)

[Scope of utility model registration request] The packaging film is wrapped around a cylindrical body for bag making, formed into a tube shape, and allowed to hang down, and as a clamp disposed on the downstream side of the cylindrical body for bag making in the direction in which the packaging film is fed out is closed, the cylindrical body for bag making is moved. The filling of the packaged material into the bag is stopped, and as the horizontal sealing machine closes, the tube-shaped film is heat-sealed in the width direction to open the top of the preceding bag and the bottom of the following bag. In a bag-forming-fill-sealing machine that seals the sealing parts and cuts the space between the two sealing parts by protruding a cutter, a pair of presser plates facing the receiving surface of the horizontal sealing machine and spaced apart in the film feeding direction; A clamp consisting of a pair of film cutting press plates that sandwich the protruding position is provided so as to be movable to open and close in a direction perpendicular to the film feeding direction, and a cooling air outlet is opened in this clamp so as to face both seals. At the same time, a seal block of the horizontal sealing machine is positioned between both presser plates so as to be reciprocally movable in the same direction as the opening/closing direction of the clamp, and the film cutting presser plate is placed between both seal surfaces of the seal block. The fitting recess into which the seal block is fitted is formed so that when the seal block moves away from the receiving surface, an air escape passage is formed between the fitting recess and the closed film cutting press plate. Features: Bag making, filling and packaging machine.