JPH0462933B2 - - Google Patents

Description

[Detailed description of the invention] Fig. 1 is a perspective view of a bag used for bag filling, Fig. 2 is a perspective view of a bag used for bag filling;
The figure is a front view of a conventional bagging and filling device, FIG. 3 is a plan view of the same, FIG. 4 is a front view of a conventional heat sealing device, and FIG. FIG. 6 is a sectional view of FIG. 4.

In the figure, reference numeral 1 denotes a bag, such as a retort pouch made of paper or plastic film, which can be opened only at the top and has three sides, left, right and bottom, which are heat-sealed in advance. 7 is an empty bag magazine, empty bag 1
It is fixedly supported by the main body frame 8. Reference numeral 9 denotes a vacuum suction cup, which takes out the bags 1 one by one from the magazine 7, descends as shown by the two-dot chain line, and conveys them to the transfer roller 10.

The transfer roller 10 is constantly rotating and feeds the empty bag 1 to a predetermined position of the bag gripping claw 11. At a predetermined position directly below the tangent to the roller 10, a chain conveyor 12 consisting of a pair of roller chains, 12 (which is guided by a rail, not shown, and moves intermittently) is provided with a mechanism for taking mechanical timing so that the bag gripping claw 11, which is attached to the bag gripping claw 11, stops. The bag gripping claw 11 grips the empty bag 1 between the movable claw 11a and the fixed claw 11b. A vacuum suction cup 20 is attached to opposing levers 21, 21 in order to open the upper part of the bag 1, and the lever 21 can swing around a support shaft 22 according to the opening state of the bag 1. Support shaft 22
is supported so as to be slidable in the vertical direction with respect to the main body 8, and the vacuum suction cup 20 is configured to perform vertical movement and bag opening movement.

Reference numeral 23 denotes a drive sprocket, which transports the chain conveyor 12 to which gripping claws 11 are attached at fixed pitches in the direction of arrow movement, and the transporting distance (1 pitch) is P. 24 is an indexing device, which is fixed to the frame 8 and gives rotation to the drive sprocket 23 via a shaft 25;
It is connected via a coupling 27 to a power source such as a motor 26 supported by the motor 26 . Also 28,2
9, 30, and 31 are driven sprockets. 32
1 is a discharge belt which sends out the bag product 1a filled with contents and sealed at the top to the outside of the machine. A filling device 33 has a hopper into which contents to be filled are placed, and fills a predetermined amount of contents from the top of the bag opened through a nozzle 34.

Numerals 35a and 35b are sealing blocks that seal the top of the bag after it has been filled with contents.The details will be described later, but they are placed facing a predetermined position on the top of the bag 1, and are pressurized and sealed by temperature. do. 36 is a hole that can accommodate a cartridge heater (not shown);
The seal square members 35a and 35b are heated. 37
is a supporter which loosely fits and supports one end (the right end in FIG. 5) of the seal square member 35a in the circular hole 39 via the heat insulating material 38. 40 is a supporter, which is located at the other end of the seal square member 35a (the left end in FIG. 5).
is loosely fitted and supported in the circular hole 42 via a heat insulating material 41.

Reference numeral 43 denotes a bracket to which the supports 37 and 40 are fixed at both ends with bolts (not shown), and the upper part of which is connected to the flat plate part 5 of the clamp 44.
2 (FIG. 6) with bolts or the like (not shown). Note that a heat insulating material 45 is fixed by bolts 46 to the surface facing the seal square member 35a. The clamp 44 includes main bosses 48 and 49 into which the shaft 47 is inserted, small bosses 50 and 51 that are integral with the main bosses 48 and 49, and a flat plate portion 52 that connects the small bosses 50 and 51. 53 is a clamp, and main bosses 54 and 55 into which the shaft 47 is inserted;
and small bosses 56 and 5 that are integrated with the main bosses 54 and 55.
7. Consists of a flat plate portion 58 connecting the small bosses 56 and 57. 59 and 60 are rollers, which are rotatably supported by pins 61 and 62 attached to small bosses 50 and 57. Spring holders 63 and 64 are supported by pins 65 attached to small bosses 51 and 56, and are equipped with tension springs 66 and 67. The other ends of the tension springs 66, 67 are fixed to the machine main body (not shown), and the seal square members 35a, 3
5b is constantly pulled in the opening direction.

A support frame 68 rotatably supports both ends of the shaft 47, and is fixed to the machine body. Reference numeral 69 denotes a presser member whose lower end contacts the rollers 59 and 60, and whose upper end is connected to a link mechanism (not shown), so that it can be raised to the position indicated by the two-dot chain line as shown in FIG. 70 is a stick,
Its both ends are rotatably loosely fitted into the supports 37 and 40, respectively, and the left end (in FIG. 5) has a knob 71.
is fixed, and free rotation is prevented by a fixing bolt 72 screwed into the supporter 40. A Teflon sheet 73 (registered trademark of Teflon) is wound in a predetermined amount around the rod 70, and its ends are fixed to a presser plate 75 and bolts 76 through protrusions 74 of the seal squares 35a and 35b.

77 is a pin, the tip of which seals the square bars 35a, 35
b, the middle part is loosely fitted into the holes formed in the supports 37 and 40, and the other end is fitted with a nut 7.
8 are screwed together. A compression spring 79 is installed between the nut 78 and the supporter 40, and pulls the seal squares 35a, 35b to the left in FIG. 5 to position the seal squares 35a, 35b. In addition, the above heat sealing device is
A first heat sealing device 80 and a second heat sealing device 81 are provided, and a cooling device 82 having a cooling element such as a water cooling pipe instead of a heating element is provided from the heat sealing device. 8 again
3 is a thermocouple.

Now, take out the empty bags 1 one by one using the vacuum suction cup 9, and move them to the feed roller 10 as shown by the two-dot chain line in FIG.
The bag 1 is held by the bag gripping claw 11 by the same roller.
is fed into a predetermined position between the movable claw 11a and the fixed claw 11b.

Next, the chain conveyor 12 moves by the dimension P and after stopping, the bag is opened by the suction cup 20. Thereafter, the bag 1 is maintained in an open state due to the rigidity of the material of the bag, and is transported to the nozzle 34 of the filling device 33, stopped at that position, and filled with the contents. After filling, the bag 1 is sealed by the sealing square material 35 of the first and second heat sealing devices 80 and 81.
hermetically sealed by a, 35b,
It is cooled by a cooling device 82.

Here, the sealing procedure will be explained in detail.
The presser member 69 pulls the rollers 59 and 60 from the position indicated by the two-dot chain line by a link mechanism (not shown) to the tension spring 6.
6, 67, the clamps 44, 53 move down to the 6th position around the shaft 47.
The bag 1 is rotated to the position indicated by the solid line in the figure, and the opening of the bag 1 is gripped by the sealing squares 35a and 35b, and heat-sealed and cooled.

Next, the presser member 69 is raised, the bag 1 is released and conveyed by the dimension P, and the above steps are repeated to complete the first heat sealing, second heat sealing and cooling steps, and the bag 1 is placed on the discharge belt 32. dropped,
The bag product 1a is discharged from the machine.

The above describes the case where bags 1 are filled and sealed while being transported in a single row. However, when changing to a multi-row transport method with two or more rows, the heat sealing device and cooling device described above are simply replaced by the number of rows. Merely increasing the number of units not only increases the size of the entire device, but also has the disadvantage of complicating the structure and increasing costs.

A Teflon sheet 73 is still wrapped around the sealing blocks 35a, 35b to prevent the contents of the bag 1 from spilling out and contaminating or burning the sealing blocks 35a, 35b. In the case of a sheet, a mesh or lattice shape is formed on the sealing surface to improve the aesthetic appearance of the bag 1. However, the Teflon sheet 73 on the sealing surface
Each time the Teflon sheet 73 becomes contaminated or burnt, it is necessary to pull out the roll of Teflon sheet 73 wrapped around the rod 70 and provide a new sheet surface, and the operation of the entire filling and sealing apparatus must be stopped each time. First, the multi-row method had the disadvantage of consuming more time.

Furthermore, when the seal squares 35a and 35b in which cartridge heaters and thermocouples are embedded are arranged in multiple rows,
As the device became larger, the structure became more complex, making maintenance and inspection difficult.

The present invention was proposed in order to solve the above-mentioned conventional drawbacks, and the present invention is arranged to sandwich bags conveyed in single or double rows, move in the direction of separation, and move the upper part of the bag through a heat-resistant cloth. In a sealing device for a bagging and filling apparatus having a pair of sealing bars that perform sealing by pinching, a guide member disposed so that the heat-resistant cloth extends on the inner surface of each of the pair of sealing bars; To provide a sealing device for a bagging and filling device, comprising a movable guide member disposed near the pair of sealing bars and supported by a compression spring to take up slack in the cloth. It is.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 7 to 22 show embodiments of the present invention.
An example of a six-row simultaneous conveyance system will be described below, but the number of rows is not limited. First, in Fig. 7, F is the bag take-out opening, G is the bag conveyance carrier part, and H is the bag removal opening.
is detection, I is air forming, J is exclusion, K is filling, M
indicates seal and N indicates discharge. Reference numeral 101 denotes a bag take-out device which takes out each bag one by one from the magazine 102 using a vacuum suction cup, reverses the bags as shown by arrow A, and transfers the bags to a conveyor (not shown). Reference numeral 103 denotes a pre-opening device which attaches vacuum suction cups to the upper and lower parts of the bag 1 which is transferred from a conveying tool that moves in the shape of an opening as shown by arrow B, and pre-opens the bag while separating the bags up and down. Next, the bag is transferred to a bag gripper of a bag conveying carrier (for example, Japanese Patent Application No. 107284/1984) as indicated by arrow C by a pusher (not shown). The carrier is conveyed by a chain conveyor 104.

Reference numeral 105 denotes a bag presence/absence detection device that detects whether or not the bag is normally gripped by the gripper using an optical detection means consisting of a phototube, a sensor, and the like.

Reference numeral 106 denotes a bag opening forming device which inserts a forming cone into the opening of the bag, blows out compressed air from an air passage provided in the forming cone, and expands and opens the bag from below. Reference numeral 107 denotes a defective bag removing device, which forcibly removes a defective bag from the machine when the defective bag is conveyed based on the signal from the bag presence/absence detection device 105.

Reference numeral 108 denotes a filling device, and when the bag reaches a predetermined position, the transport carrier is lifted up by a lifting tool 109, and the contents are filled into the bag. 110 is a sealing device, a first heat sealing device 111, a second heat sealing device 111;
Consisting of a heat sealing device 112 and a cooling device 113, after the air remaining in the bag 1 is released from the opening by a deaeration device (not shown), the conveyance carrier is lifted up with a lifter 114, and the opening is closed using the configuration described below. Heat seal and cool to solidify. 11
Reference numeral 5 denotes a discharge device, which is installed perpendicularly to the chain conveyor 104, and is used to discharge bag products 1a that have been filled and sealed.
is discharged to the next process.

Next, the details of the sealing device 110 are shown in FIGS. 8 to 21.
This will be explained based on the diagram. In the figure, 116 is a movable seal bar, and as shown in Figure 15, a heat pipe 117
is embedded, a compression spring 119 is filled between it and the spring receiving seat 118, and a bolt 120 is screwed together as shown in FIG. A fixed heat bar 121 has a heat pipe 122, a cartridge heater 123, and a thermocouple 124 embedded therein, and is fixed to a seal bar support 126a with a bolt 127 (FIG. 16) via a heat insulating material 125. 12
5 is a heat insulating material, which is attached to the seal bar support 12 described above.
It has the same horizontal length as 6a, and has notches into which the compression spring 119 and bolts 120, 127 are loosely fitted.

126a to 126c are seal bar supports,
A plate 128 is fixed to the lower end with bolts (not shown), and the movable seal bar 116 can slide between the fixed heat bar 121 and bolts 129 that support the spring receiver 118 as shown in FIG. Further, as shown in FIG. 16, a stepped hole 130 is formed into which the shaft and head of the bolt 120 are loosely fitted. Reference numeral 131 denotes a heat insulating material, which is fixed to the seal bar support 126a with bolts (not shown), facing the fixed heat bar 121. A holder 132 is fixed by welding or the like to the upper portions of both ends of the seal bar support 126a as shown in FIG. 11, and a cam follower 133 is rotatably supported.

A rail 134 is supported by a main frame 135 via a block 136, on which the cam follower 133 can slide. Reference numeral 137 denotes a double-sided rail, which is provided at an intermediate position 138 in the width of the machine (in this specific example, it is in the middle of six rows of bags, so that the bags are sorted into three rows each), and blocks 139
The cam follower 133 is supported by the main frame 135 via the cam follower 133 so as to be slidable. 14
0 is a guide block, which is fixed to the seal bar support 126a with bolts or the like (not shown) as shown in FIGS. 9 and 11. A support plate 141 is supported by the main frame 135 via a block 142 and has a cam follower 143 guided by the guide block 140.

144 is a fixed heat and seal bar, the 15th
As shown in the figure, a heat pipe 145, a cartridge heater 146, and a thermocouple 147 are embedded in the heat insulating material 1.
The seal bar support 151a is fixed by bolts 150 via 48 and 149, and the fixed heat bar 121 and the seal bar support 1
It has the same horizontal length as 26. 151a-151c
is a seal bar support, with plate 15 at the bottom end.
2 is fixed with a bolt or the like (not shown), and the holder 13 is fixed in the same manner as the seal bar support 126 described above.
2. Cam follower 133, guide block 14
0 is installed, rail 134, double-sided rail 1
37 and a cam follower 134, and is configured to move in directions opposite to the seal bar support 126.

Next, the driving relationship between the seal bar supports 126 and 151 will be explained with reference to FIGS. 8 to 10. A drive shaft 153 is set to a predetermined rotation speed by an electric motor and a speed reducer (not shown), and is rotatably supported by stands 154, 155, etc. 156 is a double-sided grooved cam, which is connected to the drive shaft 153.
It is integrated with keys etc. Reference numeral 157 denotes an upper lever, the upper end of which engages a cam follower (not shown) with the groove 158 of the double-sided grooved cam 156, and the lower end of which is integrated with the sleeve 159 by welding or the like. The sleeve 159 supports a shaft 162 rotatably supported at both ends by brackets 160 and 161 fixed on the main frame 135 via a bush 163.

164 is the lower lever, and the upper end is the sleeve 15
9 is integrally fixed to both ends of the member 9 by welding or the like, and its lower end is connected to a connecting member 165. Connecting member 16
5 is integrally fixed to the seal bar support 151c with bolts or the like. 166 is the upper lever,
The upper end has a cam follower (not shown) in the groove 158.
The lower end portion is fixed to a boss 168 that is integral with the shaft 162 using a key or the like by welding or the like. A lower lever 169 has an upper end integrally fixed to the boss 168 by welding or the like, and a lower end connected to a connecting member 170. Connecting member 1
70 is integrally fixed to the seal bar support 126c with bolts or the like.

A lever 171 has an upper end fixed to a boss 168a integral with the shaft 162 by welding or the like, and a lower end connected to a connecting member 170. A connecting block 172 connects the seal bar support 151c with a bush 203 and bolt 205, which will be described later, and the intermediate member 173 with a bolt 206, respectively. 174 is a connecting block, which is connected to the connecting block 172 by a bolt 206 via an intermediate member 173, and also connects the bush 203 and the bolt 20.
Seal bar support 126b, 151a according to 5
Concatenate. The bushes 203 are inserted into the holes 204 of the connecting blocks 172 and 174 as shown in FIG. 22, and the bolts 205 are inserted to fix them to the seal bar supports 151c, 126b, 151a. The connecting blocks 172, 174 are in a rotatable mating relationship with the bush 203. Bolt 206 connects connecting blocks 172 and 1
74 and the intermediate member 173 are fixed. 175 is a connecting block, and the seal bar support 126c and the bolt 206 are connected by a bush 203 and a bolt 205.
The intermediate members 176 are connected to each other. 177 is a connecting block, which connects the bolt 2 through the intermediate member 176.
06 to the connecting block 175, and the bush 203 and bolt 205 connect the seal bar supports 151b and 126a.
seal bar support 126a, which is heated accordingly;
126b, 151a, a seal bar support 126c that expands and contracts due to thermal expansion of 151b and is cooled;
151c is eliminated by rotating the connecting block around the bush 203.

In other words, the rotation from an electric motor (not shown) is The seal bar support 126c, 15 is converted into a linear motion of the connecting member 170 through the connecting block 175, intermediate member 176, and connecting block 177.
1b and 126a are advanced and retreated in parallel to the transport direction D of the bag 1. On the other hand, seal bar support 151c, 12
6b, 151a also drive shaft 153 → double-sided grooved cam 15
6→upper lever 157→sleeve 159→lower lever 164→connecting member 165, the movement is converted into a linear motion, and the bag 1 is moved back and forth in parallel with the transport direction D, and the seal bar supports 126c, 151
b, 126a so that they advance and retreat in opposite directions.

Next, to explain the winding relationship of the Teflon sheet, reference numeral 178 is a winding roll for feeding out, and a predetermined amount of Teflon sheet 180 is wound around a commercially available paper tube 179 (in this example, it is equivalent to three bags 1). It has a sheet width), and its both ends are held by a holder 182 fixed to the main frame 135 via a bracket 181, so that it can be extended to a predetermined length when renewing the sealing surface (Fig. 9,
Figure 10). 183 is a winding roll, FIG.
As shown in FIG. 9, it is held by a holder 185 and a holder 186 fixed to the main frame 135 via a bracket 184, and is wound up to a predetermined length when renewing the seal surface. A guide bar 186 is fixed to the rail 134, double-sided rail 137, etc., and guides the Teflon sheet 180.
A fixed guide bar 188 is disposed between the seal bar supports 126 and 151 as shown in FIG. 11, and a holder 189 is fixed to the rail 134.
A Teflon sheet 180 is wound while being supported by a holder 190 fixed to the lower surface of the double-sided rail 137.

Reference numeral 191 denotes a movable guide bar, which is disposed between the seal bar supports 151a and 151b and between the seal bar supports 126b and 126c as shown in FIG.
holder 192 fixed to the double-sided rail 13
A Teflon sheet 180 is wound while being supported by a holder 193 fixed to 7. The holder 192 has a slider 19 inside a hollow cylindrical member 194.
5 is slidably inserted in the vertical direction, a cap nut 196 is screwed into the lower part, a compression spring 197 is loaded between the slider 195 and the spring receiver 198, and the movable member is inserted into the vertical notch 199. Guide bar 191
can move up and down. The slider 195 has an end portion of the movable guide bar 191 inserted therein.

Further, the holder 193 has a structure in which the spring receiver 198 is removed from the holder 192. Note that the required path length of the Teflon sheet 180 between the feeding roll 178 and the winding roll 183 is different when heat-sealing (the state shown in FIG. 9) and when the bag is opened (the state shown in FIG. 12). However, the varying length is absorbed by the vertical movement of the movable guide bar 191, so that the Teflon sheet 180 can always maintain a tensioned state. Also the first
8 As shown in Figure 8, a fixed guide bar 188, a seal bar support 126 or 151, a movable guide bar 191
The dimensional relationship is determined so that the passes of the sheet 180 are equally spaced m.

Reference numeral 200 denotes a lift lever, the upper end of which is connected to a bracket 201 fixed to the main frame 135, and the lower end of which is connected to a drive source (not shown).
The entire sealing device 110 is centered around the drive shaft 153.
It is designed to rotate 90 degrees as shown by arrow E in Figure 9. Note that both ends of the drive shaft 153 are supported by bearings 202 fixed to a stand (not shown). Also, the movable seal bar 11 of the cooling device 113
6. The fixed heat bar 121 and the fixed heat and seal bar 144 have a built-in cooling device instead of the heater 123 and the like.

Next, to explain the operation of the sealing device 110, as shown in FIG. In addition, the cartridge heater 123, heat pipe 122, thermocouple 12
4, the fixed heat bar 121 is set to a predetermined temperature, and the rotary seal bar 116 is set to a predetermined temperature by heat transfer from the fixed heat bar 121. At this time, the heat pipe 117 makes the temperature distribution of the movable seal bar 116 uniform. On the other hand, the fixed heat and seal bar 144 is also set at a predetermined temperature by a cartridge heater 146, a heat pipe 145, and a thermocouple 147.

Next, the electric motor and speed reducer (not shown) are activated to rotate the drive shaft 153. The connecting block 175, the intermediate member 176, and the connecting block 177 move the seal bar supports 126c, 1
51b and 126a are moved by L in the transport direction D of the bag 1 as shown in FIG. On the other hand, the seal bar supports 151c, 126b, 151a also support the drive shaft 15.
3 → double-sided grooved cam 156 → upper lever 157 → sleeve 159 → lower lever 164 → connecting member 165
The bag 1 is converted into a linear motion by a distance L as shown in FIG. 15 in the direction opposite to the transport direction D of the bag 1, and the upper opening of the bag 1 is heat-sealed and cooled and solidified as shown in FIG. The movable seal bar 116 is designed to deflect the compression spring 119 by l as shown in FIG. 15).

Seal bar support 126c, 151b, 12
6a, 151c, 126b, and 151a move forward by L in opposite directions, the bag 1 moves upward by H while being held by a carrier (not shown) (Figure 9). The difference between the distance h between the upper end of the bag 1 before lifting and the lower end of the seal bar 144 and H becomes the heat seal width.

After the predetermined time has passed, the seal bar support 1
26c, 151b, 126a and seal bar supports 151c, 126b, 151a move in the opposite direction to open the bag 1. Then, the above-mentioned operations are repeated to sequentially heat seal and cool the bag 1, and then the Teflon sheet 180
The procedure for updating will be explained with reference to FIGS. 18 to 21.

In order to update the seal surface from the state shown in FIG. 18 to a new seal surface, rotate the winding roll 183,
When Teflon sheet 180 is rolled up to a length of 2 m,
A new sealing surface (X-marked part) will be created as shown in FIG. Further, at the time of the next update, by winding up a length of 2 m in the same way, a new sealing surface (O-marked part) will be created as shown in FIG. Then, at the third update, the length is 14
By winding up by m, the state shown in FIG. 18 is restored, and subsequent updates can be made in the same manner.

As described in detail above, the present invention includes a guide member disposed such that a heat-resistant cloth is spread on the inner surfaces of each of the pair of seal bars, and a guide member disposed near the pair of seal bars to take up the slack of the spread heat-resistant cloth. Since the movable guide member is disposed at the top and supported by a compression spring, when the seal bar performs opening and closing movements, the movable guide member absorbs the slack in the heat-resistant cloth, and the heat-resistant cloth is always stretched with the same tension. The sealing surface of the product can be sealed beautifully. In addition, since heat-resistant cloth can be spread on the inner surfaces of each of the pair of seal bars,
The heat-resistant cloth can be easily replaced, it can be done even while the machine is in motion, and it can be done in a short time, which provides excellent effects.

By setting a commercially available Teflon sheet between the unwinding roll and the take-up roll, it is possible to update the sealing surface with a new one even during operation without stopping the machine, significantly shortening the replacement time. It becomes possible. Note that it is also possible to automate the winding of the Teflon sheet using a motor or the like. On the other hand, by setting the dimensional relationship of the fixed guide bar, seal bar support, and movable guide bar as shown in FIG. 18, the entire surface of the Teflon sheet can be used without wasting it, and the yield of the Teflon sheet is improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a bag used for bagging, Fig. 2 is a front view of a conventional bagging and filling device, and Fig. 3 is a plan view of the same.
Figure 4 is a front view of a conventional heat sealing device, Figure 5 is a front view of a conventional heat sealing device;
The figure is a partial sectional view taken in the direction of the arrows in FIG. 4, FIG. 6 is a sectional view in the direction of the arrows in FIG. 7th
9 is a sectional view of FIG. 7,
10 is a view in the direction of the arrow in FIG. 9, FIG. 11 is a sectional view of FIG. 9, FIG. 12 is a view in the direction of the arrow in FIG. The figures are Fig. 17 - sectional view, 1st
Figure 5 is a sectional view of Figure 11, Figure 16 is a sectional view of Figure 11, Figure 17 is a sectional view of Figure 9, Figures 18, 19, and 2.
Figures 0 and 21 are explanatory diagrams showing the winding procedure of the Teflon sheet, and Figure 22 is the diagram of Figure 8.
FIG. Explanation of main parts of the figure, 1... Bag, 110... Sealing device, 116... Movable seal bar, 126a
~126c... Seal bar support, 140...
Guide block, 144... Fixed heat and seal bar, 151a-151c... Seal bar support, 180... Teflon sheet, 182... Holder, 183... Roll for winding.

Claims (1)

[Claims] 1. A bagging and filling device that has a pair of sealing bars that are arranged opposite to each other to sandwich the bags being conveyed in a single or double row, and that move in the direction of separation and seal by sandwiching the upper part of the bag with a heat-resistant cloth interposed therebetween. In the sealing device, a guide member disposed so that the heat-resistant cloth extends on the inner surface of each of the pair of seal bars;
A sealing device for a bag filling device, comprising: a movable guide member disposed near the pair of sealing bars and supported by a compression spring to take up slack in the stretched heat-resistant cloth.