JP2646514B2 - Sealing device in filling and packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a tubular package by joining films at the left and right edges in the feed direction, and providing a required space in the feed direction of the tubular package to seal in the width direction. The present invention relates to a sealing device for filling an object to be packaged between seal portions of two seals when performing.

[0002]

2. Description of the Related Art In a process of feeding a film drawn from a film roll, a filling and packaging machine heat seals left and right edges to form a cylindrical intermediate package, and then seals a bottom and fills an inner filling. A packing machine capable of sealing one filling and the bottom of the next filling with the next seal.
And Japanese Patent Application Laid-Open No. 4-339786 have been proposed. The above filling and packaging machine product is mixture of solids and liquid component such as konnyaku, pasty or are paste products, or is also Ru is used for filling such a liquid, a feature not leave any voids inside Applications are also growing.

In a conventional filling and packaging machine, a heater and a member for receiving the heater are approached by a reciprocating mechanism using a cam in order to heat seal a tubular intermediate package filled with an object to be packaged in a width direction. It has a configuration to separate. However, the reciprocating mechanism using a cam has a complicated structure, which increases the cost, and has a problem that it is difficult to obtain a high pressure.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to realize a cost reduction by a relatively simple structure for a width direction seal of a filling package.
Another object of the present invention is to enable heat sealing to be performed with a high pressure.

[0005]

In order to solve the above-mentioned problems, the present invention comprises a heater 11 for heat-sealing a tubular package in a width direction, and a pressure receiving portion 12 for receiving a pressing force of the heater 11. Placed before and after the wrapper,
The heater 11 and the pressure receiving part 12 are respectively attached to the front and rear moving rods 13 and 14 that can move in the approaching and separating directions to pass the tubular package between the heater 11 and the pressure receiving part 12, and are located on the movement line of the heater 11. Seals rotated by the provided rotation shafts 21.
Use crank member 2 2 ... sealing connecting rod 2 3 ... end connecting vital sealing connecting rod 2 3 ... other end of the coupled to the front and rear Do杆13, connecting rod 2 3 end seals There are those that took measures as activating the heater 11 when the overlap substantially straight and the movement line of the heater 11.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a filling and packaging machine according to the present invention, a film P is pulled out from a film roll R set on an upper rear portion of a main body B, and a guiding means 40 having a collar type of clothes provided on the uppermost front portion of the main body. While being formed into a tubular shape by the bent edge 41, it is substantially inverted downward, and at the same time, is passed through a central guide tube 42 provided continuously below the bent edge 41, and is fed to the left and right edges in the feeding direction. After the parts are bent at the front of the main body and the cylindrical package P 'is formed by the back seal means 43 provided at the lower part of the guide cylinder,
Heating is performed in the width direction by a sealing device A provided at the lower part of the front of the main body to form a filled package (see FIGS. 1 and 2).

The contents to be filled are supplied through a filling pipe 44 between two upper and lower horizontal seals which are heat-sealed by the sealing device according to the present invention. For this reason, the lower end 44b of the filling pipe 44 extends to the vicinity of the sealing device A past the guiding means 40 and the back sealing means 43 , and the film P and the tubular package P 'are moved around the filling pipe 44. It moves while enclosing. In such a filling and packaging machine, the film P is turned by the rotating rollers 46, 47... Of the film feeder 45 after being turned into a cylindrical molded body P 'so as not to be displaced or deformed even when a tensile force is applied. Sent by pinching P.

The sealing device A according to the present invention is located on the moving path of the cylindrical package below the film feeder 45, and is in contact with the cylindrical package P 'in the width direction.
And a pressure receiving portion 12 for receiving the pressing force of the heater 11. The heater 11 is disposed, for example, on the rear side of the cylindrical package P ′, and the pressure receiving portion 12 is disposed, for example, on the front side so as to be able to move back and forth. . Before reaching the heater 11, the front and rear films are brought into close contact with each other by the pair of front and rear ironing rollers 48, 48. Set the length.

In order to cause the heater 11 and the pressure receiving portion 12 to move forward and backward, respectively, a pair of left and right moving rods 13 and 14 are provided.
The heater 11 is attached to a heater base 15 slidably provided over both the front and rear moving rods 13 and 14. The pressure receiving portion 12 has two front and rear moving rods 13, 1
4 is mounted on a bearing plate 16 slidably mounted at the front thereof. The bearing plate 16 is attached to the body B of the filling and packaging machine, by <br/> the spring 18 which is interposed between the member 17a coupled with the front end of the longitudinal Do杆13 and the bearing plate 16, It is adapted to be energized. Double front and rear moving rod 1
The rear ends of the members 3 and 14 are slidably mounted on a rear support frame 19, and are prevented from moving forward by a member 17b which connects them outside the frame 19.

In order to move the heater 11 forward and backward, there is an operating mechanism 20 by a crank behind the heater base 15. The crank mechanism includes a sealing crank member 22 which is rotated by a rotation shaft 21 provided on a movement line of the heater 11.
One end of the connecting rod 23 for sealing is connected to the connecting rod 2 for sealing.
The other end 3 has a configuration in which it is connected to a rod 24 in the movement direction protruding behind the heater base 15. In the embodiment, the sealing crank member 22 is formed as a gear-shaped rotating wheel. 31 and 32 are gears for synchronizing the two connecting rods 23 and 28, and are driven by the motor shaft M1. A similar sealing crank member 27 which is rotated by another rotating shaft 26 for advancing the pressure receiving portion 12 is provided in parallel, and a sealing connecting rod 28 having one end connected to the crank member 27.
The other end of the rear end coupling members 17 in the front and rear Do杆13
b.

When the two connecting rods 23 and 28 for sealing come in a straight line, a pressure is applied to bring the front and rear films into close contact. Reference numerals 34 and 35 denote rotating projections which are provided on the extension of the rotating shaft 21. The detectors 36 and 37 provided near the heater 11 and the pressure receiving unit 12 come to the farthest position and the closest position. Is detected, and the operation timing of the heater 11 is obtained. The phase of the projections 34 and 35 is set to, for example, 180 degrees. 2
9a and 29b denote coupling devices.

The heat-sealed relatively lower seal portion serves as the bottom of the package for filling the object to be packaged, and the upper portion of the package is sealed by the above-described sealing mechanism after air bubbles are eliminated by the ironing roll 48 . Packaged object inside the package
A cutting device C is provided to separate the filled and completed packages as a pack one by one. Are installed separately from that below the sealing device A in are also possible but this embodiment be incorporated into the cutting device sealing device.

The illustrated cutting device C operates on the seal portion of the package, and has a blade plate 51 having a length slightly exceeding the entire width of the seal portion as a whole, and a concave portion 52 for projecting the blade plate 51. The blade plate 51 is disposed, for example, on the front side of the package seal portion, and the concave portion 52 is disposed on, for example, the rear side, so as to be movable back and forth.

In order to move the member provided with the blade plate 51 and the concave portion 52 forward and backward, respectively, a pair of left and right lower front and rear moving bars 53 and 54 are provided similarly to the sealing device. It is attached to a receiving blade member 55 which is also slidable. The blade plate 51 is a bearing plate 5 in which the front portions of lower front and rear moving rods 53 and 54 are slidably supported.
It is attached to 6. The bearing disc 56 is attached to the main body B, and is a member 5 connecting the front ends of the lower front and rear moving rods 53 and 54.
7a, a lower front-rear moving rod 53, 5
4 is urged forward. The rear end of the lower front-rear moving rod is slidably supported by the rear support frame 19, and is prevented from moving forward by a member 57a having the rear end connected outside.

Behind the forward receiving blade member 55, there is an operating mechanism 60 by means of a crank. The crank mechanism includes a rotating shaft 6 provided on the movement line of the receiving blade member 55.
Cut cutting crank member 62 which is rotated by 1
Connecting one end of use connecting rod 63, it is connected to the rod-shaped member 64 in the moving direction which projects behind the blade member 55 receiving the other end of the cutting connecting rod 63. Further, a cutting crank member 67 rotated by another rotating shaft 66 for advancing the blade plate 51 is provided in parallel, and a cutting connecting rod 68 having one end connected to the member 67 is provided. one end of the lower back-and-forth movement rod 5 of
3 and 54 are connected to the rear end connecting member 17b.

The two connecting rods 63, 68 for the cutting described above.
Rotate synchronously, after the blade plate 51 and the recess 52 are in contact, further rotation to the two connecting rods 63, 68 for cutting temporarily stopped before you back and forth in a straight line, after which the blades 51 forward It is set so that cutting is performed. 71,
Reference numeral 72 denotes a gear that synchronizes the connecting rods 63 and 68, and is driven by the motor shaft M2. 74 and 75 in the rotating projection, is provided with an extension of the rotary shaft 61 receives the position and the blades 51 and the blade plate 51 and the recess 5 2 farthest by the detector 76, 77 installed near the It detects that the front surface of the blade member 55 has come into contact with the blade member 55, and obtains the operation timing of the blade plate 51. The phase of both projections 74, 75 is thus less than 180 degrees. As a result, the heat at the time of heat sealing of the package is taken away by the contact before cutting, so that the sealing portion is cooled, so that stringing of the resin does not occur at the time of cutting operation. 69
Reference numerals a and 69b denote coupling tools.

The blade plate 51 has a bearing plate 5 as its mounting base.
6 can be moved forward and backward. Each blade plate 51
A swing lever 78 is linked to the bearing plate 56, and a fulcrum 80 is provided at a position approximately halfway from a shaft stop 79 of the lever 78 with respect to the bearing plate 56. Since the front end of the fulcrum 80 is fixed to the coupling member 57a, when the coupling member 57a approaches the bearing plate 56, the distal end of the lever 78 is
1 is almost doubled in speed and the motion is enlarged and pushed.
1 quickly completes the cutting operation. 81 indicates a return spring.

In the case of the sealing device in the filling and packaging machine of the present invention having such a configuration, the lower seal of the package is completed, the object to be packaged is filled, and the sensor provided above the squeezing roller 48 reaches the full level. When it is detected, the squeezing roller 48 is closed and the package is lowered while bringing the film into close contact. When an appropriate portion where the film is in contact with the sheet device is lowered to the sheet device, this is detected, and the sealing device A is operated, and the heater 11 and the pressure receiving portion 12 heat-seal the contact film with the strong pressing force of the crank mechanism. The seal is well welded.

When the heat sealing is completed, the package body descends by a certain dimension, and when it is detected that the sealing portion has reached the cutting device C, the device C is activated, and the cooling piece 51 'provided with the blade plate 51 and the cutting piece 51' are provided. Then, the cooling piece 52 'provided with the concave portion 52 comes into contact (FIG. 6 (b)). Here, as described above, once the contact is detected, the operation is stopped, the heat of the sealing portion is cooled, and the portion heat-sealed by the blade plate 51 which operates again is pushed out at once. Thereafter, the same operation is repeated.

Although it is within the scope of the present invention to integrate the cutting device C with the sealing device A, in this case, the cooling of the seal portion is not performed, so that the timing of the crank cutting device is also 180 degrees. This is done in degrees and does not stop before cutting. Therefore, the working speed can be improved.

[0021]

Since the present invention is constructed and operates as described above, the operation of the sealing device can be performed by a relatively simple mechanism called a crank mechanism, and as a result, the cost of the operating portion of the sealing device can be reduced. In addition, since a large pressing force can be obtained, the adhesive force of the film is increased, and the heat sealing can be more completely performed.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing one embodiment of a sealing device in a filling and packaging machine according to the present invention.

FIG. 2 is an explanatory side view of the above.

FIG. 3 is an enlarged side view showing a main part of the same.

FIG. 4 is a plan view of the sealing device.

FIG. 5 is a plan view of the cutting device.

FIG. 6 (a) is an explanatory view showing a state immediately before the operation of a cutting device. (B) Explanatory drawing at the time of cooling with a cutting device. (C) Explanatory drawing at the time of cutting by a cutting device.

FIG. 7 (A) Explanatory drawing just before operation of a sealing device. (B) Explanatory drawing at the time of cooling with a sealing device. (C) Explanatory drawing at the time of cutting by a sealing device.

Claims (3)

(57) [Claims] 1. A film is joined at the left and right edges in a feeding direction to form a cylindrical package, and a required interval is provided in the direction of feeding of the cylindrical package to seal in a width direction. A sealing device for filling an object to be packaged between sealing portions, wherein the heater 11 performs heat sealing in the width direction;
The pressure receiving portion 12 for receiving the pressing force of the heater 11 is arranged before and after the cylindrical package, and the heater 11 and the pressure receiving portion 1 are arranged.
The front and rear moving rods 13 and 14 which can move in the directions of approach and separation to pass the cylindrical package between the heater 11 and the pressure receiving portion 12 are provided.
DOO respectively mounted, is rotated by a rotating shaft 21 ... provided on the moving line of the heater 11) sealing the crank member 22
... a sealing connection rod 2 3 ... end of connecting other end for connecting vital sealing <br/> connecting rod 2 3 Each longitudinal Do杆13, 14, connecting rods 2 3 ends heater seal A sealing device in a filling and packaging machine, wherein the heater 11 is operated when the heater 11 is substantially linearly overlapped with the movement line of the heater 11. 2. A Yes the rotation shaft 21, 26 is provided to rotate in opposite directions to move the line of the heater 11, the heater 1, which is connected via a sealing connecting rod 2 3 in one rotational shaft 21
The other rotating shaft 26 and the front / rear moving rods 13 and 14 are connected via the connecting rod 28 so that the pressure receiving unit 12 moves forward and backward in the direction of the heater 11 in synchronization with the forward and backward movement of the first unit 1. The sealing device in a filling and packaging machine according to claim 1, wherein the pressure receiving portion (12) is provided at the other end of the front and rear moving rods (13, 14). 3. Cutting the heat-sealed seal portion,
A cutting device having a blade plate 51 for separating the package and a concave portion 52 for receiving the blade plate 51 protruding beyond the seal portion of the package is provided at a lower portion of the seal device, and the cut device is heated by the seal device. To cool the sealed part
2. The sealing device in a filling and packaging machine according to claim 1, wherein the sealing unit has cooling pieces 51 ', 52' which come into contact with the front and rear surfaces of the sealing portion to take heat before cutting by the blade plate 51.