JPH07315341A - Sealing device for filling/packaging machine - Google Patents

Abstract

PURPOSE:To perform a sealing in the lateral direction for a filling/packaging by a higher pressing force by an inexpensive mechanism. CONSTITUTION:A heater 11 to heat-seal a packaging body which is formed into a cylindrical shape in the lateral direction, and a pressure receiving unit 12 to receive the heater 11 are arranged in the front and rear of the packaging body, and the heater 11 is movably attached along longitudinal movable rods 13, 14. In addition, one end of a connection rod 31... is connected to a crank member 22... which rotates by a rotation axis 21... which is provided on the moving track of the heater 11. Then, the other end of the connection rod 31... is connected to respective longitudinal movable rods 13, 14, and the heater 11 operates when the end of the connection rod 31 is overlapped on the moving track of the heater 11 into an approx. straight line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a tubular wrapping body by joining films at the left and right edges in the feed direction, and seals the tubular wrapping body in the widthwise direction at a required interval. The present invention relates to a sealing device for filling an article to be packaged between sealing portions of two seals when performing.

[0002]

2. Description of the Related Art In a filling and packaging machine, in the process of feeding a film drawn from a film roll, the left and right edges are heat-sealed to form a cylindrical intermediate packaging body, which is then sealed at the bottom and filled with the material to be filled inside. However, the packaging machine is capable of sealing one filling by the next sealing and bottom sealing the next filling.
Japanese Patent Laid-Open No. 4-339786 and the like have been proposed. The above-mentioned filling and packaging machine is used for filling products, such as thread konjac, which has a mixture of solid content and liquid content, paste-like or kneaded product, or liquid, and is characterized by the fact that no bubbles remain inside. Is gradually increasing.

In the case of a conventional filling and packaging machine, in order to heat seal a tubular intermediate packaging body filled with an article to be packaged in the width direction, a heater and a member for receiving the heater are approached by a reciprocating mechanism using a cam. It has a structure for separating and opening. However, the reciprocating mechanism using the cam has a complicated structure, which causes a cost increase and 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 its object is to realize cost reduction by a relatively simple structure for a widthwise seal of filling packaging.
In addition, it is necessary to be able to perform heat sealing with high pressure.

[0005]

In order to solve the above-mentioned problems, the present invention has a cylinder including a heater 11 for heat-sealing a tubular package in the width direction, and a pressure receiving portion 12 for receiving a pressure applied by the heater 11. It is placed before and after the package
The heater 11 and the pressure receiving portion 12 are attached to the front and rear moving rods 13 and 14 which can move in the approaching and separating directions to pass the tubular package between the heater 11 and the pressure receiving portion 12, respectively. One end of the connecting rod 31 is connected to the crank member 26 which is rotated by the rotating shaft 21 provided, and the other end of the connecting rod 31 is connected to the front and rear moving rods 13 and 14, and the end of the connecting rod 31 is a heater. The means for activating the heater 11 is provided when the heater 11 is substantially linearly overlapped with the movement line of the heater 11.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The filling and packaging machine according to the present invention pulls out a film P from a film roll R set on an upper part of a rear surface of a main body B, and is provided with a clothing collar type guiding means 40 provided at the uppermost part of the front surface of the main body. At the same time as it is turned substantially downward in a tubular shape by the bending edge 41, at the same time, it is passed through a central guiding tube 42 continuously provided under the bending edge 41, and the left and right edges in the feeding direction are bent at the front of the main body. Back seal means 4 provided at the bottom of the guide tube
After the tubular package P'is formed by 3, the heat-sealing is provided in the lower portion of the front surface of the main body to form a filled package (see FIGS. 1 and 2).

The contents to be filled are supplied through the filling pipe 44 between the two horizontal seals, which are heat-sealed by the sealing device according to the present invention. For this reason, the lower end of the filling pipe 44 extends near the sealing device 10 by passing through the 44b guiding means 40 and the back sealing means 20, and the film P and the tubular package P'are centered on the filling pipe 44. Move around while enclosing. In such a filling and packaging machine, the film P is formed by the rotary rollers 46, 47, ... Of the film feeding device 45 after forming the tubular molded body P ′ so that the film P is not displaced or deformed even if a tensile force is applied. Sent by holding P.

The sealing device A according to the present invention is located in the tubular package moving path below the film feeding device 45 and is in contact with the tubular package P'in the width direction.
And a pressure receiving portion 12 that receives the pressing force of the heater 11. The heater 11 is arranged, for example, on the rear side of the tubular package P ′, and the pressure receiving portion 12 is arranged on the front side, for example, so as to be movable back and forth. . Before reaching the heater 11, the front and rear films of the tubular package are brought into close contact with each other by a pair of front and rear squeezing rollers 48, but the width of the tubular package is slightly longer than the width of the tubular package at that time. 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 arranged.
The heater 11 is attached to a heater base 15 slidably provided on both front and rear moving rods 13 and 14. Further, the pressure receiving portion 12 is provided with both front and rear moving rods 13, 1
4 is attached to a bearing disc 16 which is slidably supported at its front portion. The bearing disc 16 is attached to the main body B of the filling and packaging machine, and a spring 18 interposed between the member 17a connecting the front and rear moving rods 13 and 14 at the front end and the bearing disc 16 allows the front and rear moving rods 13 and 14 to be moved. Is being urged to. The rear ends of the front and rear moving rods 13 and 14 are slidably supported by the rear support frame 19, and the forward movement is blocked by a member 17b connecting them to the outside of the frame 19.

In order to move the heater 11 back and forth, behind the heater base 15 is an operating mechanism 20 by means of a crank. The crank mechanism is connected to a crank member 22 which is rotated by a rotary shaft 21 provided on the movement line of the heater 11 and a rod 2
3, one end of the connecting rod 23 is connected, and the other end of the connecting rod 23 is connected to a rod-like member 24 projecting to the rear of the heater base 15 in the moving direction. In the embodiment, the crank member 22 is formed as a gear wheel. Reference numerals 31 and 32 denote gears that synchronize the two connecting rods 23 and 28, and are driven by the motor shaft M1. In order to advance the pressure receiving portion 12, another rotary shaft 2
Similar crank members 27 that rotate by 6 are arranged side by side, and one end of each is connected to the crank member 27.
The other end of 8 is the rear end coupling member 17 of the front and rear moving rods 13, 14.
It has a structure connected to b.

The two connecting rods 23, 28 for the heater are set so that a pressing force for bringing the front and rear films into close contact can be obtained when the two connecting rods 23, 28 for the heater come in a straight line. Reference numerals 34 and 35 denote rotary protrusions, which are provided on the extension of the rotary shaft 21, and are located at the farthest position and the closest position between the heater 11 and the pressure receiving portion 12 by the detectors 36 and 37 installed near them. It is detected that the operation timing of the heater 11 is obtained. The phase of both protrusions 34 and 35 is set to 180 degrees, for example. Two
Reference numerals 9a and 29b denote coupling tools.

The heat-sealed relatively lower sealing portion serves as the bottom of the package for filling the object to be packaged, and the upper part of the package has the air bubbles removed by the ironing roll 48 and then the above-mentioned seal in the package. Sealed in the mechanism,
A cutting device C is provided to separate the packages completed as a pack one by one. The cutting device can be incorporated in the sealing device, but in the present embodiment, it is installed separately from that under the sealing device A.

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, and a recess 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 recess 52 is disposed, for example, on the rear side so as to be movable back and forth.

In order to advance and retract the member having the blade plate 51 and the recess 52 respectively, a pair of left and right lower front and rear movement rods 53, 54 are provided, like the sealing device, and the recess 52 has a lower front and rear movement rod 53. It is attached to a receiving blade member 55 that is also slidable on 54. The blade plate 51 is a bearing plate 5 in which the front portions of the 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 in which the front ends of the lower front and rear moving rods 53 and 54 are joined.
7a and a spring 58 interposed between the lower front and rear moving rods 53, 5
4 is urged forward. The rear end of the lower front and rear moving rod is slidably supported by the rear support frame 19, and the forward movement is blocked by a member 57a having the rear end coupled to the outside thereof.

A crank actuating mechanism 60 is provided behind the advance receiving blade member 55 to move it forward and backward. The crank mechanism includes a rotary shaft 6 provided on the moving line of the receiving blade member 55.
One end of the connecting rod 63 is connected to the crank member 62 which rotates by 1, and the other end of the connecting rod 63 is connected to a rod member 64 in the moving direction which is projected behind the receiving blade member 55. Further, a crank member 67 which is rotated by another rotating shaft 66 for advancing the blade plate 51 is arranged in parallel, and the other end of the connecting rod 68 having one end connected to the member 67 has lower front and rear rods 53, 54. It has a structure connected to the rear end coupling member 17b.

The two connecting rods 63, 68 for cutting are
After the blade plate 51 and the recess 52 come into contact with each other in a synchronous rotation, the blade plate 51 and the recessed portion 52 contact each other, and further rotate to stop before the connecting rods 63 and 68 move back and forth in a straight line. After that, the blade plate 51 moves forward to perform cutting. Is set to. 71 and 72 are both connecting rods 6
The gears synchronize with 3, 68 and are driven by the motor shaft M2. 74 and 75 are rotary projections, which are provided on the extension of the rotary shaft 61 and are provided near the detectors 76 and 77.
Thus, it is detected that the blade plate 51 and the recess 54 are at the farthest position and the position where the blade plate 51 and the front surface of the receiving blade member 55 come into contact with each other, and the operation timing of the blade plate 51 is obtained. Both protrusions 7
The phase of 4,75 is therefore less than 180 degrees. As a result, the heat at the time of heat-sealing the package is removed by the contact before cutting, so that the seal portion is cooled, and the stringing of the resin or the like does not occur during the cutting operation. Reference numerals 69a and 69b denote coupling tools.

The blade plate 51 is the bearing base 5 which is the mounting base.
6 is configured to be able to move forward and backward. Each blade 51
A rocking lever 78 is connected to the bearing board 56 and a fulcrum 80 is provided at a position about halfway from a shaft stop point 79 of the lever 78 with respect to the bearing board 56. Since this fulcrum 80 is fixed to the front end connecting member 57a, when the connecting member 57a approaches the bearing disc 56, the tip of the lever 78 is fixed to the blade plate 51.
The blade plate 51
Quickly completes the cutting operation. 81 is a return spring.

In the case of the sealing device in the filling and packaging machine of the present invention having such a structure, the lower sealing of the package is completed, the object to be packaged is filled, and the sensor provided above the ironing roller 48 is full. Upon detection, the squeezing roller 48 closes to bring the film into close contact, and the package descends. When the appropriate position where the film is in contact is lowered to the seat device, it is detected, and the sealing device A operates to heat-seal the contact film by the heater 11 and the pressure receiving portion 12 with a strong pressing force of the crank mechanism. A well-welded seal is made.

When the heat-sealing is completed, the package is lowered by a certain size, and when it is detected that the sealing portion has reached the cutting device C, the device C is operated and the cooling piece 51 'having the blade plate 51 is provided. , And the cooling piece 52 'provided with the concave portion 52 come into contact with each other (FIG. 6 (b)). As described above, when the contact is detected, the operation is temporarily stopped, the heat of the seal portion is cooled, and then the portion that is heat-sealed by the blade plate 51 that operates again is pressed all at once. After that, 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 sealing portion is not performed, and therefore the timing of the crank cutting device is 180. It is performed in degrees and never stops 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 such as a crank mechanism, and as a result, the cost of the operating portion of the sealing device is reduced. In addition, since a large pressing force can be obtained, the adhesion of the film is enhanced, and the heat sealing can be performed more completely.

[Brief description of drawings]

FIG. 1 is a front explanatory 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 a side view showing an enlarged main part of the same.

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

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

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

Claims (3)

[Claims] 1. When a film is joined at the left and right edges in the feed direction to form a tubular package, and a predetermined gap is provided in the feed direction of the tubular package to perform a widthwise seal, two locations are provided. A sealing device for filling an article to be packaged between sealing parts, the heater 11 performing heat sealing in the width direction,
The pressure receiving portion 12 that receives the pressing force of the heater 11 is arranged in front of and behind the tubular package, and the heater 11 and the pressure receiving portion 1 are arranged.
The heater 11 and the pressure receiving portion 12 are attached to the front and rear moving rods 13 and 14 which are movable in the approaching and separating directions in order to pass the tubular package between them.
Are connected to the crank member 22 which is rotated by a rotary shaft 21 provided on the moving line of the heater 11, and one end of the connecting rod 31 is connected to the crank member 22. 14 and the end of the connecting rod 31 is the heater 1
A sealing device in a filling and packaging machine, characterized in that the heater 11 is activated when the heater 11 is substantially linearly overlapped with the movement line of 1. 2. Rotating shafts 21 and 26 that rotate in opposite directions are provided on the moving line of the heater 11, and the heater 11 connected to one rotating shaft 21 via a connecting rod 31 moves forward and backward. In synchronism with the above, the other rotating shaft 26 and the front and rear moving rods 13 and 14 are connected via a connecting rod 28 so that the pressure receiving portion 12 moves forward and backward toward the heater 11, and the front and rear moving rod 1
The sealing device for a filling and packaging machine according to claim 1, wherein the pressure receiving portion 12 is provided at the other end of each of the sealing members 3 and 14. 3. Cutting the heat-sealed seal portion,
A cutting device having a blade plate 51 for separating the package and a recess 52 for receiving the blade plate 51 protruding beyond the sealing portion of the package is provided at the lower part of the sealing device, and the cutting device is heated by the sealing device. To cool the sealed part,
2. The sealing device in a filling and packaging machine according to claim 1, wherein the sealing portion is provided with cooling pieces 51 'and 52' which contact the front and rear surfaces to remove heat before cutting with the blade plate 51.