JPH04114833A - Packing device for vacuum or gas filling - Google Patents

Abstract

PURPOSE:To obtain a smooth and effective air vacuuming without generating any wrinkles on a bag mouth edge by a method wherein the bag mouth edge which is widened fully at both ends by two nozzles is pressed and held by a pressing rod provided on sandwiching rods. CONSTITUTION:When a bag mouth edge is inserted into a pair of nozzles 15 and a motor 27 is driven, the pair of nozzles 15 move together with sliders 19 to slide rightward and leftward respectively so that the bag mouth edge is widened fully in the lateral direction, and at the same time, a pair of sandwiching rods 16 move upward and downward respectively and close to press the bag mouth edge. In this instance, the pair of nozzles 15 are designed to move rightward and leftward by a length of a pressing rod 25, so that the pair of nozzles 15 stop at a position where the mouth edge of the bag is widened to its full extent. In this constitution, as the nozzles are positioned at the both ends of the bag and air is exhausted with the bag mouth edge widened fully, the air can be vacuumed smoothly and completely, without generating any wrinkles.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides simple vacuum packaging for raw meat, ham and other foods, electric/electronic parts such as ICs, automobile parts, etc., as needed. The present invention relates to a vacuum or gas filling packaging device that can be filled with gas after being evacuated or evacuated.

[Prior Art] As a conventionally used vacuum or gas filling packaging device of this type, the one shown in FIGS. 12 and 13 is the vacuum or gas filling packaging device described in Japanese Patent Publication No. 1887/1987. This device consists of a pair of clamping rods 16.1 that sandwich the tips of a pair of nozzles 15.15 provided in the center of the device body from above and below.
6 and a pair of heat-sealing rods 17.17 are arranged in each stage, and in use, first, the bag body containing the required food, etc. is fitted into the tip of the nozzle 15.15, and then the pair of heat-sealing rods 17. Hold the mouth edge of the bag with the nozzle 15.15 from above and below using the clamping rod 16.16, and hold the nozzle 15.1 in this state.
After activating the vacuum pump (not shown) connected to the proximal end of 5 to suction the air inside the bag, the pair of heat-sealing rods 17.17
Press and heat-bond the mouth edge of the bag with a pair of heat-sealing rods 17.
．． 17 and a pair of clamping rods 16 and 16 are opened to take out the desired bag.

[Problems to be Solved by the Invention] In the prior art, maintaining the airtightness of the packaging bag and achieving complete sealing have been solved to some extent in that the nozzle is movable. However, when the nozzle that has been evacuated to the rear during heat sealing is returned to the front in preparation for the next packaging operation, there is a problem in that the nozzle cannot be smoothly returned to its original position because the nozzle is pulled forward by the spring 64. There was a point.

That is, if the spring gets caught in the middle of the sliding body 19 because it is pulled momentarily by the contraction action of the spring, or if the contraction force of the spring becomes weak, it is not possible to return to the original position smoothly and accurately.

In addition, since the nozzle is fitted in a sliding body 19 made of a rectangular cylinder so that it can move back and forth, if dust, oil lumps, etc. accumulate inside this sliding body, the sliding movement of the nozzle becomes hard. ,
There was a problem with the spring not being able to pull it. Particularly when the device is in operation, atomized dust is always floating around the nozzle, and the dust tends to accumulate inside the sliding body. Moreover, lubricating oil is contained within the sliding body to aid the sliding movement of the nozzle, and this lubricating oil tends to solidify as the nozzle moves back and forth frequently.

For this reason, it has been desired to develop a packaging device for vacuum or gas filling that allows the nozzle to advance and retreat smoothly and accurately even when used for a long period of time.

Also, in the prior art, two clutches 39,39 are used to connect gear 42,42, drive body 44,44 and gear 45.
Two sliding bodies 19.19 with nozzles attached via
can move left and right.

In this way, the two sliding bodies 19.19 are each independently driven by separate drive systems, so their left and right movements often do not match completely, and as a result, the left and right openings of the nozzle do not match, resulting in an imbalance. Because the nozzle does not open at a predetermined position in the center of the base, the set bag often moves and comes off from the nozzle, making it impossible to create a vacuum.

Furthermore, in the prior art, a sliding body 19 consisting of a rectangular cylinder
．． 19 is fitted to the four support rods 18 so that its four corners can be slidably moved, or when it is fitted to the support rods 18, all the fitting holes are inserted into the four corners of the sliding body. 16 holes had to be drilled, and when drilling these 16 holes, the positions of all the holes needed to be perfectly matched, which was extremely difficult in terms of processing. . If there is even a slight mismatch among these 16 fitting holes, there is a problem in that the sliding body cannot move smoothly from side to side, and the nozzle cannot move smoothly from side to side.

[Summary of the Invention] The present invention was made to solve the problems existing in the above-mentioned prior art, and it enables a pair of two nozzles to smoothly and accurately move forward and backward as well as to move left and right, and the two nozzles are packaged. The purpose is to accurately position the bag on both sides of the bag and freely match the size and shape of various packaging bags to ensure smooth and reliable air suction or gas filling, and at the same time improve work efficiency. .

Further, the present invention holds the nozzle and the mouth edge of the bag airtightly with a clamping rod during air suction or gas filling, and maintains the airtight holding state with the clamping rod during heat sealing, and simultaneously retreats the nozzle. Another purpose is to close and heat seal the heat sealing rod to ensure an airtight seal.

[Means for Solving the Problems] The present invention employs the following means to solve the above problems.

Two support rods 1 installed horizontally in the center of the front of the device body 1
A pair of sliders 19.19 are attached to 8.18 so as to be movable left and right, a guide rod 20.20 is provided on the back side of this pair of sliders 19.19, and a pair of left and right nozzles 15.15 are inserted with their tips to the required length. Nozzle stand 2 protruding forward
1.21 is attached to the guide rods 20, 20 so as to be movable back and forth, and the pair of nozzle stands 21.21 are movable left and right in conjunction with the pair of sliders 19.19. 21 is attached to a guide body 22 so as to be able to move freely back and forth, and a pair of upper and lower clamping rods 16 move up and down while keeping each other horizontal.
．． 16 and a pair of upper and lower heat-sealing rods 17.17 are arranged above and below the pair of nozzle holes 5.15, and a long through gap 24 is provided in the above-mentioned space through which the pair of heat-sealing rods 17.17 can freely pass. A pair of clamping rods 16.16 are provided in the middle, and both ends of the pair of clamping rods 16.16 are connected to form a rectangular frame shape, and the pressure contact portion is made of soft rubber such as sponge rubber. A pair of rods 25.25 are provided at upper and lower positions and two positions in the front and rear, a heater 26 is provided on one of the pair of heat seal rods 17.17, and a clutch 39 for adjusting the left and right movement of the pair of nozzles 15.15 is connected to the pair of rods 25.25. Slider 19.19
A drive body 35.35.41.44, such as a chain, is provided in the drive unit of the drive unit for interlocking the horizontal movement of the pair of nozzles 15.15 and the vertical movement of the pair of clamping rods 16.16,
A pair of drive bodies 52.52.61.61 such as chains are provided for interlocking the back and forth movement of the pair of nozzles 15.15 and the vertical movement of the pair of heat sealing rods 17.17. .

[Function] The present invention has the above-mentioned configuration, so that the opening of a synthetic resin bag containing raw meat, ham, other foods, etc. or various electrical parts, etc., is connected to a pair of nozzles as shown in FIG. 15.
15, and when the motor 27 is rotated, the driving body 35, such as a chain, rotates and the pair of clamping rods 16 are rotated.
．． 16 up and down in the closing direction. At the same time, a driving body 41 such as a chain is operated in conjunction with a driving body 35.35 such as a chain.
A pair of nozzles 15. and a driving body 44 such as a chain are also rotated at the same time to form a pair of nozzles 15.19 attached to a pair of sliders 19.19.
15 left and right in the direction of opening. In this case, when the pair of nozzles 15 and 15 open to the cup on both sides of the bag mouth edge, the clutch 3
9 is activated, the driving body 41, such as a chain, and the driving body 44, such as a chain, stop rotating, and the pair of nozzles 15 and 15 stop at the corresponding position.

On the other hand, the pair of clamping rods 16.16 continue to move up and down and stop at a position where they press against the bag mouth edge and the pair of nozzles 15.15 from above and below. The motor 27 is controlled by a known electrical method so as to stop when the pair of clamping rods 16, 16 are in pressure contact with each other. At the same time as the pair of clamping rods 16.16 stop in a pressurized state, the vacuum pump 5 is activated, and the air inside the bag is evacuated through the pair of nozzles 15.15, creating a vacuum state. Then, a series of operations such as gas filling are performed as necessary (see Figure 6).
.

When the work of evacuating the inside of the bag or filling it with gas is completed, the motor 28 rotates and drives a pair of driving bodies 52 such as chains.
．． 52, the pair of heat-sealing rods 17.17 move up and down in the closing direction and come into pressure contact with the mouth edge of the bag, thereby performing heat-sealing.

In conjunction with the vertical movement of the heat sealing rod 17 and F, a pair of driving bodies 61.61 such as chains also rotate, and are rotated by the pair of driving bodies 61.61 such as chains via the guide body 22. The pair of nozzles 15.15 are retracted and removed from the mouth edge of the bag during heat sealing (see FIG. 7).

Further, even during heat sealing, the mouth edge of the bag is still held in pressure contact with the pair of clamping rods 16,16.

After the heat sealing is completed, the motors 27 and 28 rotate in the opposite direction, unlike in the previous case, and the pair of clamping rods 16 and 16 and the pair of heat sealing rods 17 and 17 move up and down in the opening direction and return to their old state. do. As the pair of heat sealing rods 17.17 move, the pair of nozzles 15.15 are rotated by a pair of driving bodies 61.61 such as chains and move forward, and at the same time return to the position before retreating, the pair of nozzles 15.15 move forward. As the clamping rod 16.16 moves, the pair of nozzles 15.15 move left and right in the closing direction and return to their initial state in preparation for the next packaging operation (see FIG. 8).

[Example] An example of the implementation of the present invention will be described in detail below based on the drawings.

As shown in FIG. 11, the device of the present invention has a box-like shape as a whole, and the rim of the bag for the desired material to be packaged is inserted into the center of a front lid 2 that covers the front of the device body 1. A window 3 for vacuum and gas filling is opened, and above the window 3 there is a power switch, power lamp, start button, vacuum pump button,
A heat lamp, a gas blowout switch, a heat seal button, a return button, a vacuum pressure setting dial, a gas timer adjustment knob, a heater temperature adjustment knob, and other various instruments 4 are provided.

The device main body 1 includes a vacuum pump 5 as an attached device.
Oxygen cylinder 6, nitrogen gas cylinder 7, carbon dioxide cylinder 8,
Mixer 9, flow meter 10. Cylinder pressure gauge 11, exhaust port 12
, a drain port 13, and a vacuum gauge 14 are provided.

Although not provided in the embodiment, a mounting table for the packaged object may be provided protruding from the lower edge of the window 3 so that its height can be freely adjusted.

Next, the present invention will be explained based on FIGS. 1 to 4.

FIG. 1 is a front view with the front cover 2 removed. On the front side of the main body 1 of the apparatus, a pair of nozzles 15, 15 are provided in the center, with their tips protruding forward for a required length, and is a pair of upper and lower clamping rods 16. that move up and down while keeping each other horizontal.
16 and a pair of upper and lower heat seal rods 17 and 17 are provided.

The pair of nozzles 15.15 are connected to the pair of nozzle stands 21.
21 is protruded in front of the nozzle stand 21.21.
is attached to a pair of sliders 19.19 whose upper and lower ends are attached to two upper and lower support rods 18.18 so as to be slidable left and right.The pair of sliders 19. .19 is movable from side to side in order to spread the mouth edge of the bag to the left and right. Since the pair of sliders 19.19 slide on the two support rods 18.18 in this manner, the left and right movement thereof can be performed extremely accurately and smoothly.

On the back side of the pair of sliders 19.19, a long 2
Book guide rods 20, 20 are provided to protrude rearward, and a pair of nozzle stands 21, 21 are attached to these guide rods 20, 20.
is guided by the guide rod 20.20 and moves rearward during heat sealing, and the nozzle 15.15 is disengaged from the mouth edge of the bag body. In this way, the nozzles 151, 15 slide on the guide rod 20.20 via the nozzle stand 21.21, so that their horizontal movement can be performed extremely accurately and smoothly.

A nozzle stand 2 equipped with the pair of nozzles 15 and 15.
1.21 is attached to a guide body 22 at its upper part, and is guided by the guide body 22 and retreats during heat sealing, and then returns to its original position and advances when preparing for the next operation.

The pair of clamping rods 16.16 have a long opening 2 in the middle part.
4.24 and its both ends are connected to form a frame with a rectangular planar shape, and the pressure contact part is
A pressure rod 25 made of soft rubber such as sponge rubber is provided. The press rods 25 are provided in pairs at the upper and lower sides and at two locations at the front and rear.

The pair of clamping rods 16.16 move up and down to press and hold the mouth edge of the bag which is spread laterally by the pair of nozzles 15.15, and when the air inside the bag is evacuated to create a vacuum. When filling the bag with a desired gas such as nitrogen gas in a vacuum state and when heat sealing is performed, the mouth edge of the bag is held under pressure from above and below.

The pair of heat-sealing rods 17.17 are provided to move up and down within the gap 24 of the pair of clamping rods 16.16, and a heater 26 is provided on the surface of the lower heat-sealing rod 17.
The surface of the upper heat-sealing rod 17 is covered with silicone rubber or the like and holds the mouth edge of the bag horizontally under pressure.

The pair of heat-sealing rods 17.17 move up and down during heat-sealing to heat-seal the mouth edge of the bag.

The heater 26 is set to automatically turn off after a certain period of time has passed via a timer, and the heat sealing time can be adjusted as appropriate depending on the material of the bag.

Two motors 27 and 28 are provided at the bottom of the device body 1, and a rotating shaft 31 is attached to one motor 27 via a worm gear 29 and a worm wheel 30. A pair of bevel gears 32.32 are provided at both ends of the bevel gear 310.
32, a pair of bevel gears 33, 33 and a pair of gears 34
．． A pair of driving bodies 35, 35, such as chains, are connected via 34.

The pair of drive bodies 35.35 such as chains are guided by a pair of gears 36.36 provided at the top of the device main body 1 and the pair of gears 34.34 to rotate.
The outer lower parts of the pair of drive bodies 35, 35, such as chains, are fixed 37, 37 to the lower clamping rod 16, and the inner upper parts are fixed 38, 38 to the upper clamping rod 16.

Therefore, when the pair of drive bodies 35.35 such as chains rotate, the pair of clamping rods 16.16 move up and down in the closing direction at the same speed; on the other hand, when the pair of clamping rods 16.16 rotate in the opposite direction, The pair of clamping rods 16.16 move up and down in the opening direction.

A gear 40 is pivotally attached to the one gear 36 via a clutch 39, and a gear 42 and a gear 43 coaxial therewith are connected to this gear 40 via a drive body 41 such as a chain. There is. Three gears 4 are connected to each other via a drive body 44 such as a chain driven by this gear 43.
5.45.45 has been communicated.

The upper part of the driving body 44 such as the chain is fixed 69,69 to one slider 19, and the lower part is fixed 23,23 to the other slider 19.

Therefore, when the pair of drive bodies 44 such as chains rotate clockwise, the pair of sliders 19 and 19 move left and right in the closing direction at the same speed, whereas when they rotate in the opposite direction The pair of sliders 19.19 move left and right in the opening direction.

When the bag mouth edge is inserted into the pair of nozzles 15.15 and the motor 27 is rotated, the pair of nozzles 15.15 slide left and right in conjunction with the slider 19.19, and the bag mouth edge is rotated. At the same time, a pair of clamping rods 1
6.16 respectively move up and down to close and press against the mouth edge of the bag.

At this time, the pair of nozzles 15.15 is configured to move left and right by the length of the pressure rod 25, but the clutch 3
9, the bag can be stopped at any position depending on the size of the bag. namely a pair of nozzles 15.1
5 is designed to stop at a position where the mouth edge of the bag body is spread out to the left and right sides.

Next, a rotating shaft 48 is attached to the other motor 28 via a worm gear 46 and a worm wheel 47, and a pair of bevel gears 49 and 49 are provided at both ends of the rotating shaft 48. A pair of drive bodies 52,52 such as chains are connected to the pair of bevel gears 49,49 via a pair of bevel gears 50,50 and a pair of gears 51,51.

The pair of driving bodies 52.52 such as chains are guided by a pair of gears 53.53 provided at the upper part of the device main body 1 and the pair of gears 51.51 and rotate.
The inner lower parts of the pair of drive bodies 52, 52 such as chains are fixed 54, 54 to the lower surface of the end of the lower heat sealing rod 17, and the outer upper parts are fixed to both upper and lower ends of the upper heat sealing rod 17. 55.55.

A pair of sliding rods 56.56 are provided at the inner center of the pair of driving bodies 52.52 such as chains, and the lower ends of the pair of sliding rods 56.56 are heat-sealed below. It is fixed 57.57 to the upper surface of the rod 17, and its upper end passes through the end of the upper heat-sealed rod 17 and is fixed 58.58 to a drive body 52.52 such as a pair of chains.

Since the pair of driving bodies 52.52 such as chains and the pair of heat sealing rods 17.17 are configured as described above,
When the drive bodies 52, 52 such as a pair of chains rotate, the lower heat-sealing rod 17 is pulled upward, and the upper heat-sealing rod 17 is pulled down and moved up and down in the closing direction. Press and heat seal the edges. At this time, the pair of sliding rods 56,56 slide within the upper heat-sealing rod 17. On the other hand, when rotating in the opposite direction, the pair of heat sealing rods 17.17 move up and down in the opening direction.

A pair of guide rods 59.59 are provided penetrating through both ends of the pair of heat seal rods 17.17, and the pair of heat seal rods 17.17 are attached to the pair of guide rods 59.59. It moves vertically up and down while being guided and held horizontally.

A pair of gears 60.6 are provided inside both ends of the rotating shaft 48.
A pair of driving bodies 61, 61 such as chains are attached to this gear 60160, and a pair of gears 62, 62 and a pair of gears 63, 63 are connected to make it rotatable. There is.

The pair of drive bodies 61.61, such as chains, are attached to both ends of the guide body 22 fitted to the upper part of the nozzle stand 21.21, and move the guide body 22 back and forth.

As the heat sealing rod 17.17 moves downward or upward during heat sealing, the driving body 61 such as the pair of chains
．． 61 is also rotated in conjunction, and at the same time, the guide body 22 is moved rearward to retreat the pair of nozzle stands 21.2.

After the heat sealing is completed, the heat sealing rod 17.17 moves upward or downward, and at the same time, the guide body 22 moves forward due to the rotation of the drive body 61.61 in the opposite direction, and the pair of nozzle stands 21.2
1 moves forward and returns to the old state.

In FIG. 9, a steam/water separator 66 and a vacuum pump 5 are connected to the base ends of a pair of nozzles 15.15 through a solenoid valve 64, and an oxygen cylinder 6 and a nitrogen gas are connected through a solenoid valve 65 and a mixer 9. This shows a state in which the gas cylinder 7 and the carbon dioxide gas cylinder 8 are connected, and after the air inside the bag is removed to create a vacuum state, the solenoid valve 64 is closed, and then the solenoid valve 65 is opened to inject gas. The amount of gas injected is adjusted by adjusting the injection time using a timer.

FIG. 11 shows a steam/water separator, and a steam/water separator 66 having a filter 67 is provided between a pair of nozzles 15, 15 and the vacuum pump 5 to separate air and moisture.

Thereby, even foods containing moisture can be easily vacuum packed. At this time, the water inside the bag is also discharged via the steam separator 66 at the same time.

Further, when filling the bag with nitrogen gas, for example, depending on the type of food, the nitrogen gas cylinder 7 is used. The operation of the vacuum pump 5 and the various gas cylinders 6,7.8, as well as the electromagnetic valves 64,65 are automatically performed by known electrical methods. In the figure, 68 is a rubber valve.

[Effect of the invention] Therefore, according to the present invention, the mouth edge of the bag is formed by two nozzles.
Since both ends of the bag are fully expanded, they are pressed and held by the pressure rods installed on the clamping rods, so the rim of the bag is held in a completely flat state without any wrinkles.
Air removal or gas filling can be performed smoothly and satisfactorily.

It can be heat-sealed in the same state as above, and not only does the heat-sealed part have a good appearance, but it can also be completely packaged without any wrinkles or the like. Moreover, since the pair of clamping rods are provided with two pressing rods at the front and back with a gap, the bag mouth edge can be held more stably in two positions by changing the position. be.

Next, the air inside the bag is removed at two locations using a pair of two nozzles, so the air moves evenly during removal without being biased in one direction, and the bag does not become extremely deformed. The air can be removed smoothly and efficiently without any problems.

In particular, the nozzles are located at both ends of the bag, and the air is discharged with the mouth of the bag fully expanded, which prevents deformation of the bag and allows air to be removed without causing wrinkles. can be carried out smoothly and completely.

Further, in the present invention, the left and right movement of the nozzle for spreading the mouth edge of the bag left and right is linked to the up and down movement of the clamping rod, and the retreating movement of the nozzle during heat sealing is linked to the up and down movement of the heat sealing rod. Therefore, a series of continuous operations such as air extraction, gas filling, and heat sealing can be performed completely and reliably without any slight deviation.

Furthermore, the nozzle and clamping rod, and the nozzle and heat sealing rod are all mechanically linked via a driving body such as a chain, which doubles the reliability of their operation and at the same time prevents them from malfunctioning. It can be used for a long period of time without any damage.

Furthermore, since a clutch is installed to freely control the left and right movement of the nozzle, vacuum packaging or gas-filled packaging is possible for bags of any size.
It is possible to continuously package many types of products without replacing parts.

Furthermore, in the present invention, when the nozzle that has been evacuated to the rear during heat sealing is returned to the front in preparation for the next packaging operation, the nozzle is not pulled forward by the action of a spring as in the past, but may be The nozzle is not fitted into a sliding body made of a rectangular cylinder so that it can move back and forth, as in the conventional case, but instead slides back and forth on a guide rod via a nozzle stand. It can be returned to its original position smoothly and accurately.

In addition, the present invention does not use two clutches to separately drive the left and right nozzles to move them left and right, as in the past, but the left and right movement is controlled by a single clutch. The nozzle can be opened exactly at a predetermined position in the center of the base.

Furthermore, in the present invention, the pair of sliders are mounted on two support rods, instead of the conventional method in which the sliding body is slidably fitted at the four corners of the four support rods so as to be able to move left and right. Since the nozzle slides on the upper surface, the nozzle can be moved from side to side extremely accurately and smoothly.As a result, the nozzle can be moved from side to side accurately and smoothly.

[Brief explanation of drawings]

Fig. 1 is a front view of the device of the present invention with the front cover removed, Fig. 2 is a partially cutaway side sectional view of the same, and Fig. 3 is a state in which the slider of the present invention is closed and the nozzle stand is advanced. FIG. 4 is a perspective view showing the slider of the present invention in an open state and the nozzle stand retracted. FIG. 5 is a perspective view and a cross-sectional view of the bag body of the present invention set. Fig. 6 is a front view and a sectional view showing the state of the bag in vacuum or gas filling, Fig. 7 is a front view and a sectional view showing the state of the bag according to the present invention when it is heat-sealed, and Fig. 8 is a front view and a sectional view showing the state of the bag according to the present invention when it is heat-sealed. A front view and a cross-sectional view showing the nozzle returned to its original state after the heat sealing of the bag, FIG. 9 is an explanatory diagram showing the nozzle, vacuum pump, and gas cylinder of the present invention, and FIG. 10 is a diagram showing the nozzle of the present invention. Explanatory diagram showing a steam/water separator, 1st
FIG. 1 is a perspective view showing the entire device of the present invention, FIG. 12 is a front view of the conventional device, and FIG. 13 is a side sectional view of the same. ...Device body, 1 6... Holding rod, 1 8... Support rod, 1 0... Guide rod, 2 4... Clearance, 25 6... Heater, 3 5.41.44,

Claims (1)

[Claims] A pair of sliders (19), (
19) so that it can move left and right, and this pair of sliders (
A nozzle stand (21) comprising guide rods (20), (20) provided on the back surfaces of (19) and (19), and a pair of left and right nozzles (15), (15) with their tips protruding forward by a required length. )
, (21) are attached to the guide rods (20), (20) so as to be movable back and forth, and the pair of nozzle stands (21), (21) are interlocked with the pair of sliders (19), (19). The pair of nozzle stands (21), (21) are attached to the guide body (22) so as to be movable back and forth, and a pair of upper and lower gripping rods (16) move up and down while keeping each other horizontal. , (16
) and a pair of upper and lower heat sealing rods (17), (17) are arranged above and below the pair of nozzles (15), (15),
A long opening (24) that allows the pair of heat sealing rods (17) to freely pass through the pair of clamping rods (16).
, (16) and the pair of clamping rods (1
6) Connect both ends of (16) to form a rectangular frame shape, and attach pressure contact rods (25), (25) made of soft rubber such as sponge rubber to the pressure contact portions in pairs at the top and bottom and at two locations in the front and back. A heater (26) is provided on one of the pair of heat seal rods (17), (17), and the pair of nozzles (15),
A clutch (39) for adjusting the left-right movement of the pair of sliders (19), (19) is provided in the drive section of the pair of sliders (19), (19), and the clutch (39) adjusts the left-right movement of the pair of nozzles (15), (15) and the pair of clamping Driving bodies (35), (35), (41), such as chains for interlocking the vertical movement of the rods (16), (16)
44), and a pair of drive bodies (52) such as chains for interlocking the back and forth movement of the pair of nozzles (15), (15) and the vertical movement of the pair of heat sealing rods (17), (17).
), (52), (61), and (61).