KR100754030B1 - Apparatus for Holding A Packing Bag - Google Patents

Abstract

Provided is a vacuum bag holding device suitable for use in an automatic packaging system for vacuum packaging food using a vacuum bag.

The present invention provides a device for fixing a vacuum bag for holding food by opening the inlet of the vacuum bag, the rail is installed; A pair of grippers having a slider movable in the width direction along the rail on one side and having a sound collecting part for fixing both sides of the vacuum bag to the other side; Width adjusting means including a motor means for moving the slider of the gripper along the rail to position the gripper in the width direction; And bag fixing means for picking up and fixing the vacuum bag by providing a cylinder means for providing a driving force to the gripper.

According to the present invention, it is possible to mount vacuum bags of various sizes, and the effect of opening and closing the vacuum bags during transport of the vacuum bags is obtained.

Vacuum Bags, Grippers, Width Control Units, Bag Holders, Vacuum Bag Holders

Description

Vacuum bag fixing device {Apparatus for Holding A Packing Bag}

1 is a perspective view showing a vacuum packaging machine according to the prior art.

Figure 2 is an external perspective view showing the vacuum bag fixing device according to the present invention as a whole.

Figure 3 is a side view showing a vacuum bag fixing device according to the present invention.

4 is a side view showing a vacuum bag fixing device according to the present invention;

      a) a side view along A of FIG. 3, b) a cross-sectional view along line B-B of FIG.

Figure 5 is a detail view of the main portion of the vacuum bag fixing device according to the present invention.

Figure 6 is an operation explanatory view showing a sound collecting portion of the vacuum bag fixing device according to the present invention.

Figure 7 is an external perspective view showing a state in which the vacuum bag is fixed by the vacuum bag fixing device according to the present invention.

8 is an operation explanatory view showing a state in which the inlet of the vacuum bag is opened by the vacuum bag fixing device according to the present invention;

9 is an operation explanatory view showing a state in which the inlet of the vacuum bag is closed by the vacuum bag fixing device according to the present invention;

Figure 10 a), b) is a block diagram having a modified width adjusting means in the vacuum bag fixing apparatus according to the present invention.

Figure 11 a), b) is a configuration having a width adjusting means further modified in the vacuum bag fixing apparatus according to the present invention.

       * Description of the symbols for the main parts of the drawings *

1 .... Vacuum bag holding device according to the present invention

5 .... Feed mechanism 10 .... Pedestal

20a, 20b .... Grippers 23a, 23b ... Collection

30 .... means for regulating width 32 .... means for motor

36 .... screw shaft 38a, 38b .... nut member

42 .... Drive Pulley 44 .... Driven Pulley

46 ... belt 50 ... bolt

54a, 54b .... Slider 60 .... Envelope Fixture

64a, 64b .... support surface 66a, 66b .... bracket

70a, 70b .... Pushing vs. 72a, 72b .... Loading

74a, 74b .... pin 76 .... pneumatic line

80 .... Pneumatic Pressure Source 100 ... Control

130,160 ... Modified width adjusting means 132. Motor means

136 .... screw shaft 138,168 .... nut member

140a, 140b ... link member 142 .... rail

144a, 144b .... Slider 146 .... Bolt

170 .... Rail 172 .... Mobile

182a .... screw hole 182b .... round hole

200 ... conventional vacuum packing machine 210, 220 ... upper, lower case

223,224 ... rubber packing 225 ... vacuum pump

230 ... vacuum bags

The present invention relates to a device for fixing a vacuum bag in a packaging system for vacuum packaging food using a vacuum bag, and more specifically, it is possible to adjust the width in accordance with the width of the vacuum bag to mount a vacuum bag of various sizes It is possible to open and close the vacuum bag during the transfer of the vacuum bag, and to improve the vacuum bag fastening device to be used in an automated vacuum automatic packaging system by fast fixing the vacuum bag.

In general, in order to store food or cooked food for a long time, it is packaged in a lap or plastic paper and stored in a refrigerator such as a refrigerator.

However, the storage form of the freezer may be stored for a predetermined period of time, but in the long term, the food and food are oxidized and decayed due to the air contained in the packaging, so that the storage is not easy for a long time. .

In order to solve the above problems, a vacuum packaging machine is developed and used to put food in a vacuum packaging and extract air to prevent oxidation and deterioration of food or cooked food and to store it for a long time.

In the conventional vacuum packaging machine 200, as shown in Figure 1, the upper and lower rubber packing 223, 224 is installed in the upper and lower, inside the lower case 210, 220, the upper and lower A vacuum pump 225 is provided to suck air in the rubber packings 223 and 224, and the heater 221 is a heating means for sealing the vacuum bag 230 on the front surface of the lower rubber packing 210. Is installed.

The conventional vacuum packaging machine 200 puts food that the user wants to store in the vacuum bag 230, and the inlet portion of the vacuum bag 230 is positioned between the upper and lower rubber packings 223 and 224 to be engaged. The upper case 220 is covered so that it is closed.

In the above state, when the predetermined switch is pressed, the vacuum pump 225 is operated, and vacuum is made in the space between the rubber packings 223 and 224 according to the operation of the vacuum pump 225. When the air inside the envelope 230 is discharged and the vacuum formation in the vacuum envelope 230 is completed as described above, power is applied to the heater 221 installed at the front end of the lower rubber packing 223 so that the vacuum envelope Sealing is performed while 230 is thermally fused.

Such a conventional vacuum packaging machine 200 can store the food in a vacuum state in the vacuum bag 230, but the vacuum packaging operation is a single packaging method by the manpower has a limit in its productivity and efficiency will be.

Therefore, in order to solve the problems of work productivity and efficiency occurring in the conventional vacuum packaging machine 200, the introduction of a more automated and productive vacuum packaging system is urgently needed.

An example of such an automated vacuum packaging system is a rotary type vacuum packaging system (not shown), in which a vacuum bag is vacuum-packed with food inside while continuously rotating the vacuum bag step by step in the vacuum packaging system.

That is, by sequentially rotating the vacuum bags provided in step by step to feed the food into the inside, and in the next step to form a vacuum pressure inside the bag through the inlet of the vacuum bag, and then sealed the inlet to automatically packaging. In the next step, a series of automated continuous processes of collecting vacuum-packed vacuum bags in sequence are carried out in a rotary type.

In such a rotary vacuum packaging system, a device for mounting and transporting vacuum bags is required. In particular, a system requiring various sizes of vacuum packaging requires the ability to carry and transport vacuum bags of various sizes. There was no development of a device capable of fixing and transporting these various sizes of vacuum bags as one device.

In addition, the vacuum bag fixing device used in such a vacuum packaging system is to open the vacuum bag inlet during the transfer, so that the food is smoothly added in the next step, after the food is formed to form a vacuum to seal, Although it is required to open and close the inlet of the vacuum bag, a vacuum bag fixing device having such characteristics has not been developed.

In addition, in order to improve the productivity of the vacuum packaging operation, it is required to fasten the vacuum bag using power and to carry the vacuum bag in a stable state even if the weight of the food is heavy. There is no development.

The present invention is to solve the conventional problems as described above, the object is to be able to fix and transport the vacuum bag as a device without a separate exchange for the vacuum bag of various sizes can be used in various kinds of food packaging In addition, to provide a vacuum bag fixing device that can reduce the size of the vacuum packaging system as a whole.

And another object of the present invention is to provide a vacuum bag fixing device that can be opened and closed automatically during the conveyance of the vacuum bag during the conveyance of the vacuum bag can be made of food or vacuum and sealing, etc. in the next step will be.

In addition, another object of the present invention is to provide a vacuum bag fixing device which can fasten a vacuum bag using power and fix the vacuum bag in a stable state even when the weight is heavy because food is contained. will be.

In order to achieve the above object, the present invention is an apparatus for fixing a vacuum bag for holding food by opening the inlet of the vacuum bag, the rail is installed; A pair of grippers having a slider movable in the width direction along the rail on one side and having a sound collecting part for fixing both sides of the vacuum bag to the other side; Width adjusting means including a motor means for moving the slider of the gripper along the rail to position the gripper in the width direction; And bag fixing means for picking up and fixing the vacuum bag by providing a cylinder means for providing a driving force to the gripper.

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Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The vacuum bag holding device 1 according to the present invention, as shown in Figure 2, during the movement of the vacuum bag to open the inlet to contain the food, after the food containing the inlet to seal the vacuum bag in vacuum Close it.

The vacuum bag fixing device 1 according to the present invention has a pedestal 10 which is connected to the transfer mechanism 5 and is movable. The pedestal 10 is connected to a transfer mechanism 5, which may be made, for example, of a transfer stand of a rotary vacuum packaging system (not shown). Therefore, the pedestal 10 can perform a linear movement or a pivoting movement about one axis according to the operation of the transfer mechanism (5).

In addition, the present invention includes a pair of grippers 20a and 20b that are movable in the width direction on the pedestal 10 and each of which fixes both sides of the vacuum bag P.

The grippers 20a and 20b may be connected to one side of the gripper 20 so as to be movable on the pedestal 10, and the other side of the grippers 20a and 20b may form collection parts 23a and 23b that pick up the vacuum bag P. The grippers 20a and 20b are moved in the width direction along the rail 33 on the pedestal 10 by the width adjusting means 30.

The width adjusting means 30 has a motor means 32 mounted on the pedestal 10, the motor means 32 may be made of a servo motor (electric servo motor), etc. capable of electrically forward and reverse rotation. have.

The width adjusting means 30 is screwed to the screw shaft 36 and the screw shaft 36 fixed to be rotatable in the width direction on the pedestal 10, and the gripper 20a, 20b on the upper surface thereof. ) Comprise a pair of nut members 38a and 38b, each of which is fixed. In addition, the width adjustment means 30 is mounted in the center of the drive pulley 42 and the screw shaft 36 fixed to the rotation shaft of the servo motor, as shown in Figure 4a), b) Driven pulley 44 and belt 46 connecting the drive pulley 42 and driven pulleys 44. Therefore, when the driving pulley 42 rotates forward and reverse by the operation of the motor means 32, the driven pulley 44 connected to the driving pulley 42 through the belt 46 rotates forward and reverse, and accordingly The screw shaft 36 on which the driven pulley 44 is mounted is rotated forward and reverse on the pedestal 10 through the bearing blocks 39a and 39b provided at both side ends thereof.

In addition, the screw shaft 36 capable of forward and reverse rotation causes left and right movement of the nut members 38a and 38b, and the nut members 38a and 38b are shown in FIG. 5. Similarly, since the rear ends of the grippers 20a and 20b are fixed to the upper surfaces thereof with bolts 50, respectively, the grippers 20a and 20b are movable in the width direction on the pedestal 10 through this operation. Do.

In the above operation, the screw shaft 36 has screw threads in different directions on both sides of the driven pulley 44. That is, when the right side thread is formed on the one side, the left side thread is formed on the other side, or vice versa. Due to this different orientation of the thread, the nut members 38a and 38b screwed to this screw shaft 36 move in opposite directions during the forward and reverse rotation operations of the screw shaft 36. That is, for example, when the servo motor constituting the motor means 32 rotates in the forward direction, the grippers 20a and 20b separately connected to the nut members 38a and 38b move close to each other, When the servo motor rotates in the reverse direction, the grippers 20a and 20b move away from each other.

Alternatively, on the contrary, when the servo motor constituting the motor means 32 rotates in the forward direction, the grippers 20a and 20b separately connected to the nut members 38a and 38b move to move away from each other, and the servo motor Is rotated in the reverse direction, the grippers 20a and 20b may move close to each other.

Meanwhile, the grippers 20a and 20b moving as described above move on the rail 33 so that the grippers 20a and 20b move on the pedestal 10 with straightness. The rail 33 is made of a conventional LM guide, the rail 33 is fixed on the pedestal 10 while keeping parallel to the front side of the screw shaft 36, the rail A pair of sliders 54a and 54b are fitted to the slide 33 so as to be slidable, and the lower surfaces of the grippers 20a and 20b are interviewed on the upper surfaces of the sliders 54a and 54b, respectively. As shown in), it is a structure that is connected to the bolt 52 fastening.

Therefore, the grippers 20a and 20b are movable along the rail 33 by the sliders 54a and 54b when the grippers 20a and 20b move in the width direction on the pedestal 10 by the width adjusting means 30. It is movable with a straightness in a stable state.

In addition, the present invention includes a bag fixing means (60) having cylinder means (62a, 62b) for providing a driving force to the grippers (20a, 20b) to pick up and fix the vacuum bag (P).

The bag fixing means 60 allows the grippers 20a and 20b to fix the vacuum bags P, respectively, and operates the collection portions 23a and 23b of the grippers 20a and 20b. . Collection portions 23a and 23b of the grippers 20a and 20b are supported surfaces 64a and 64b formed in a bent state at the front end of each of the grippers 20a and 20b, as shown in FIG. ) And press bars 70a and 70b having their centers rotatably centered on hinge axes 68a and 68b on brackets 66a and 66b protruding from the support surfaces 64a and 64b. And the rear ends of the pressers 70a and 70b are operably connected by the cylinder means 62a and 62b of the bag holding means 60.

That is, the pusher 70a, 70b has its rear end rotatably connected via pins 74a, 74b at the ends of the rods 72a, 72b of the cylinder means 62a, 62b, respectively. When the rods 72a and 72b of the means 62a and 62b move forwards and backwards, the pushers 70a and 70b are pivoted about their central hinge axes 68a and 68b so that their front ends are collected. Both edges of the vacuum bag P are narrowly fixed between the support surfaces 64a and 64b while being in close contact with or away from the support surfaces 64a and 64b of the 23a and 23b.

The cylinder means (62a) (62b) in the above may be made of a pneumatic cylinder, etc., the pneumatic line (76) is connected to the body to transfer the rods (72a, 72b) of the cylinder means (62a, 62b), Reverse operation. That is, the cylinder means (62a) (62b) when the air pressure is applied to the rear side pneumatic line of the body and the air pressure is discharged to the front side pneumatic line, the rod 72a (72b) makes the advance, and 70a and 70b narrowly support the vacuum bag P between the supporting surfaces 64a and 64b, and on the contrary, if pneumatic is discharged to the rear pneumatic line and air is provided to the front pneumatic line, , The rods 72a and 72b are moved backwards, and the pressers 70a and 70b are separated from the support surfaces 64a and 64b to release the vacuum bag P.

When the cylinder means 62a and 62b are made of pneumatic cylinders, a separate pneumatic pressure source 80 is provided with a flexible pipe, a valve (not shown) and a square hole pressure regulating system (not shown). It can be connected via pneumatic line 76 to provide pneumatic pressure or to discharge pneumatic pressure. Such a structure can be used because the pneumatic supply system commonly used in the art, a more detailed description thereof will be omitted.

Reference numeral 100 is a control unit, a small computer or a programmable logic controller (PLG) to automatically control the width control means 30 and the envelope fixing means 60 by a predetermined program or sequence (Sequence), etc. Can be made.

As shown in FIG. 7, the vacuum bag fixing device 1 according to the present invention configured as described above picks up and fixes both edges of the vacuum bag P through a pair of grippers 20a and 20b. In this process, the grippers 20a and 20b may be properly fixed to the various sizes of the vacuum bags P by adjusting the gap therebetween in accordance with the width of the vacuum bags P. FIG.

That is, in order to position the grippers 20a and 20b in accordance with the width direction size of the vacuum bag P, the operator operates the motor means 32 of the width adjusting means 30 to hold the grippers 20a and 20b. Adjust the space between. That is, in the case of the servo motor constituting the motor means 32, if the rotation speed is rotated by a predetermined amount, the screw shaft 36 by the predetermined rotation speed through the drive pulley 42, the belt 46 and the driven pulley 44 The rotation of the screw shaft 36 causes the grippers 20a and 20b to be moved in the width direction by a predetermined interval through the nut members 38a and 38b.

Therefore, the operator can adjust the position of the gripper 20a, 20b by controlling the operation of the motor means 32, and in that state operates the cylinder means 62a, 62b of the bag holding means 60. To open the collecting portions 23a and 23b of the grippers 20a and 20b, and then place the vacuum bag P in the collecting portions 23a and 23b of the grippers 20a and 20b. The vacuum bag P is fixed to the grippers 20a and 20b by closing 23a and 23b.

In this case, the vacuum bag P is preferably fixed by the grippers 20a and 20b at a position slightly below the upper end thereof. The reason is that when the vacuum bag P is fixed according to the present invention as described above, the vacuum bag P moves and contains food therein while forming a vacuum, and then the inlet Pa of the vacuum bag P is again formed. ), The food inlet (not shown), the vacuum pressure generator (not shown), and the sealing mechanism (not shown) should frequently enter the inlet (Pa) side of the vacuum bag (P) for this operation. Therefore, for this purpose, it is preferable to mount the inlet (Pa) portion of the vacuum bag (P) in advance so as to be positioned in advance so as to be located slightly above the gripper (20a, 20b).

And the vacuum bag fixing device 1 according to the present invention, as shown in Figure 7, by the grippers (20a, 20b) to move both sides of the vacuum bag (P) in a fixed state, during this movement The inlet Pa of the vacuum bag P is opened. This is to enlarge the inlet (Pa) greatly in order to easily contain food in the vacuum bag (P) in the subsequent process.

In such a case, the motor means 32 of the width adjusting means 30 is operated to narrow the gap between the grippers 20a and 20b. That is, the motor means 32 is rotated by a predetermined number of revolutions in either the forward rotation or the reverse rotation in accordance with a predetermined program of the controller 100.

Accordingly, since the grippers 20a and 20b are moved close to each other so that the gap therebetween is narrowed, as shown in FIG. 8, the vacuum bag P having both edges fixed to the grippers 20a and 20b is The inlet Pa expands naturally to form a food inlet space. In the above, the vacuum bag P is made of a material having a predetermined thickness and elasticity, and is fixed to the grippers 20a and 20b so that the gap between the grippers 20a and 20b is narrowed. Can be planned in advance to form a food input space exactly in the center thereof.

When the gap between the grippers 20a and 20b is narrowed by such an operation, the inlet Pa forms a food inlet space while the center thereof opens, and in this state, the food injector of the rotary vacuum packaging system ( (Not shown) is moved to the food input space of the food inlet (Pa).

When food is contained in the vacuum bag P as described above, the weight of the vacuum bag P increases due to the load of the food, but the vacuum bag P is a cylinder means 62a (62b) operated by a pneumatic cylinder. In the state of being fixed by the grippers 20a and 20b, it is fixed to the grippers 20a and 20b in a stable state and is movable to the next process despite the increase in the load of the vacuum bag P.

In addition, the vacuum bag P is moved to move the grippers 20a and 20b away from both sides in the process of being transferred to the next step, so that the inlet Pa is narrowed.

That is, when the motor means 32 of the width adjustment means 30 operates in the opposite operation to the above, the distance between the grippers 20a and 20b is adjusted to be wide. That is, the motor means 32 is rotated by a predetermined number of revolutions in either the direction of reverse rotation or forward rotation according to a predetermined program of the controller 100. Accordingly, since the grippers 20a and 20b are moved to be spaced apart from each other as shown in FIG. 9, the vacuum bags P having both edges fixed to the grippers 20a and 20b are inserted into the inlet Pa. ) Closes naturally, narrowing the food input space.

In such a state, the vacuum bag fixing device 1 according to the present invention, in which the vacuum bag P is fixed, moves to a subsequent process, and the vacuum bag P is provided in a separate vacuum forming apparatus provided in a vacuum packaging system (not shown). A vacuum pressure is formed inside, and at the same time as the vacuum pressure, the inlet Pa of the vacuum bag P is sealed by a separate sealing means.

When the vacuum and sealing operation of the vacuum bag P is completed as described above, the vacuum bag fixing device 1 according to the present invention moves to the next step with the vacuum bag P in which the packing is completed, and moves to the gripper 20a. The vacuum bag P is put down in a separate collection device (not shown) by opening the sound collecting portions 23a and 23b of the 20b, and a new vacuum bag P is mounted to start the next process.

On the other hand, the present invention is a modified embodiment of the width in Figure 10, the width adjustment means is shown a structure that is modified differently.

The width adjusting means 130 shown in FIG. 10 is provided with a motor means 132 on the pedestal 10, and the screw shaft 136 and the screw is fixed to the forward and reverse rotation by the motor means 132 A nut member 138 screwed to the shaft 136.

One end is rotatably connected to both sides of the nut member 138, and the other end includes link members 140a and 140b rotatably connected to lower surfaces of the grippers 20a and 20b, respectively.

When the width adjustment means 130 is the screw shaft 136 forward and reverse rotation by the operation of the motor means 132, which means that the nut member 138 moves along the screw shaft 136, The movement of the nut member 138 pushes the grippers 20a and 20b to the left and right on the rail 142 through the link members 140a and 140b.

The rail 142 is fixed in the transverse direction on the pedestal 10, a pair of sliders (144a, 144b) is fitted on the rail 142 so as to be slidable, the sliders (144a) (144b) The upper surface of the gripper (20a, 20b) is a lower surface of the interview, as shown in Figure 10b, is connected to the bolt 146, such as fastening.

Therefore, the left and right positions of the grippers 20a and 20b can be adjusted through the width adjusting means 130.

In addition, the present invention is shown in another modified embodiment in Figure 11, the structure in which the width adjusting means is modified differently.

The width adjusting means 160 shown in FIG. 11 is provided with a plurality of motor means 162a and 162b on the pedestal 10, and is fixed to the forward and reverse rotation by the motor means 162a and 162b. And a nut member 168 having a plurality of screw shafts 166a and 166b and engaging the screw shafts 166a and 166b.

The motor means 162a and the screw shaft 166a are for moving the grippers 20a and 20b back and forth, and the motor means 162b and the screw shafts 166b are used to move the grippers 20a and 20b. It is for moving in the left-right direction. The motor means 162b is mounted on a movable table 172 that is movable on a separate rail 170 provided in the pedestal 10.

In addition, the nut member 168 to which the screw shafts 166a and 166b are coupled passes through a screw hole 182a to which the screw shaft 166a is screwed and a circular cross-sectional portion 184 of the screw shaft 166b. Circular holes 182b are formed.

Thus, when the screw shaft 166a is rotated by the motor means 162a, the nut member 168 moves along the screw shaft 166a, and the movement of the nut member 168 is caused by the screw shaft 166a. The grippers 20a and 20b are moved back and forth through. In this case, the motor means 162b is movable on the rail 170 of the pedestal 10 forward and backward.

When the motor means 162b rotates, the screw shaft 166b is rotated, which is gripper screwed through the left screw portion 186a and the right screw portion 186b provided on the screw shaft 166b. The distance between the (20a) and (20b) can be changed narrowly or widely.

As such, the present invention can achieve the movement of the grippers 20a and 20b through various deformation structures.

According to the present invention as described above, it is possible to fix and transport the vacuum bag as a device for vacuum bags of various sizes by adjusting the position in the width direction of the gripper or the gap therebetween. Therefore, the vacuum bag of various sizes can be processed, so that it can be used for various kinds of food packaging, and one device can handle several types of vacuum bags, so that the overall size of the vacuum packing system to which the present invention is mounted can be reduced. The effect can be obtained.

In addition, the present invention can easily open and close the opening of the vacuum bag during the transport of the vacuum bag to form a food input space can easily contain food in the interior of the vacuum bag in a subsequent process, after the food is easily closed by narrowing the opening It can either create a vacuum pressure or achieve a fast, automatic sealing operation.

In addition, since the present invention uses a pneumatic cylinder to secure the vacuum bag by a power type, even if the food is contained and the weight is heavy, it is possible to transfer the vacuum bag in a stable state in a fast and efficient vacuum packaging system An effect that can be used in the construction of is obtained.

While the invention has been shown and described with respect to specific embodiments thereof, it has been described by way of example only to illustrate the invention, and is not intended to limit the invention to this particular structure. Those skilled in the art will appreciate that various modifications and changes of the present invention can be made without departing from the spirit and scope of the invention as set forth in the claims below. Nevertheless, it will be clearly understood that all such modifications and variations are included within the scope of the present invention.

Claims (11)

In the device for fixing the vacuum bag for holding food by opening the opening of the vacuum bag, Pedestal with rails; A pair of grippers having a slider movable in the width direction along the rail on one side and having a sound collecting part for fixing both sides of the vacuum bag to the other side; Width adjusting means including a motor means for moving the slider of the gripper along the rail to position the gripper in the width direction; And Bag holding means for picking up and fixing the vacuum bag with a cylinder means for providing a driving force to the gripper; Vacuum bag fixing device comprising a. delete delete The method of claim 1, The motor means comprises a servo motor mounted on the pedestal and capable of electrically forward and reverse rotation; A screw shaft fixedly rotatable in the width direction on the pedestal, and a pair of nut members screwed to the screw shaft, the grippers being fixed to the upper surface thereof, respectively; And fixing a gripper including a drive pulley fixed to a rotation shaft of the servo motor, a driven pulley mounted at the center of the screw shaft, and a belt connecting the driving pulley and the driven pulley. Device.        5. The screw shaft of claim 4, wherein the screw shafts are formed on opposite sides of driven pulleys in different directions, so that the grippers move close to each other or move away from each other by the operation of the motor means. Vacuum bag holding device.        6. The vacuum bag holding device according to claim 5, wherein the rail is made of an LM guide, and the rail is fixed on a pedestal while keeping parallel to the front side of the screw shaft. The method of claim 1, The collectors have a support surface formed at a front end of each gripper in a bent state, and a press bar connected to a center thereof to be rotatable about a hinge axis on a bracket protruding from the support surface. Is a bag operably connected by the cylinder means of the bag holding means.       8. The presser according to claim 7, wherein the presser end is rotatably connected via pins at the end of the rod of the cylinder means, so that when the rod of the cylinder means moves forward and backward, the presser is pivoted about its central hinge axis and the front end thereof. The vacuum bag holding device, characterized in that the two sides of the vacuum bag is narrowly fixed between the support surface while being in close contact with or away from the support surface of the collecting portion. The method according to any one of claims 1, 7, and 8, The width adjusting means is provided with a motor means on the pedestal, the screw shaft is fixed to the forward and reverse rotation by the motor means, the nut member screwed to the screw shaft, and one end is rotated on both sides of the nut member And the other end includes link members rotatably connected to the lower surfaces of the grippers, respectively, and when the screw shafts are rotated forward and backward by the operation of the motor means, the grip members are pushed left and right through the link members. And a vacuum bag holding device configured to move. The method according to any one of claims 1, 7, and 8, The width adjusting means is provided with a plurality of motor means on the pedestal, and has a plurality of screw shafts fixed to the forward and reverse rotation by the motor means, and comprises a nut member coupled to the screw shaft, And said one motor means and one screw shaft are for moving the grippers forward and backward, and said other motor means and the other screw shafts are for moving the grippers in left and right directions.       The vacuum bag fixing apparatus according to claim 10, wherein the motor means for moving the grippers in the left and right directions is mounted on a movable table movable on a separate rail provided in the pedestal.

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