JPH1199570A - Bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the certainty in the arrangement of envelopes by sucking air from a plurality of sucking holes bored in a delivery drum in the radius direction thereof to hold envelopes to arrange envelopes regardless of a bag making speed without applying holding marks to the envelopes. SOLUTION: The pressure changeover hole provided to the side surface 71B of a delivery drum 71 is positioned at the pressure reducing nozzle part of a changeover nozzle 77 and, since sucking holes 75 of notches 74 are connected to the negative pressure state in the pressure reducing nozzles through the pipe part provided in the delivery drum 71 and the pressure changeover hole bored in the side surface 71B of the delivery drum 71, envelopes are sucked to the notches 74 by the sucking holes 75 and the bottom parts of the envelopes are fixed to the bottom stop surfaces of the notches 74 in a contact state. Subsequently, even when the delivery drum 71 is rotated, the pressure changeover hole is positioned at the pressure reducing nozzle part of the changeover nozzle 77 and, therefore, the envelopes are rotated and transferred accompanied by the rotation of the delivery drum 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making machine for continuously forming, for example, mail envelopes.

[0002]

2. Description of the Related Art In a bag making machine for forming such an envelope or the like,
The continuous bag paper R in the form of a roll is sequentially conveyed, and in the middle of this conveyance, as shown in FIG. 7, the cut portion C is cut out to form a side folded portion B1 and a bottom folded portion B2. The envelope B is formed by gluing to B1 and folding and bonding from the folding line L1 and then cutting from the cutting line L2 and folding and bonding the bottom folded portion B2 from the bottom folding line L3.

[0003] The formed envelope B is aligned and discharged,
In addition, the number of manufactured sheets is counted by shifting the alignment position for every predetermined number, for example, 100 sheets.
At this time, as shown in FIG.
When the delivery drum Z having the number 1 is aligned and the predetermined number is counted, the envelope B is pushed laterally with respect to the alignment position by a pushing mechanism (not shown).

[0004]

However, when the envelopes are aligned by the catching claws as described above, there is a possibility that the envelope caught by the catching claws will have a pinch mark, which may impair the aesthetic appearance of the product. There was a problem. In addition, when the bag making speed is as high as about 600 sheets per minute, the mark on the bottom of the envelope becomes remarkable, and the operation speed of the catching claw operated by a cam, a spring, and the like is limited, When the number of bags made per unit time is intended to increase, there is a problem that the number of bags may reach a peak. Also, when the envelope is pushed out from the side by the pushing mechanism at the predetermined number of counts, if the bag making speed is as high as about 600 sheets per minute, the pushed out envelope is crushed and the aligned position is shifted in the lateral direction. There was a problem that the movement might not be performed.

The present invention has been made in view of the above circumstances, and aims to achieve the following objects. To provide a bag making machine with no pinch marks. Envelope alignment regardless of bag making speed, to improve the reliability of envelope alignment. Improve workability.

[0006]

SUMMARY OF THE INVENTION In a bag making machine having a delivery unit for forming a bag body (envelope) and sending it out with its bottom part facing forward and aligning the envelope on an alignment table, the delivery unit is formed by A delivery drum for rotating and transferring the envelope to the aligning table. The delivery drum is connected to driving means for rotating and driven, and for rotating and transferring the envelope while holding the envelope on the outer periphery of the delivery drum. Holding means. The holding means is provided on the outer periphery of the delivery drum with, for example, four notches arranged at equal intervals and arranged substantially in parallel with the rotation axis of the delivery drum, and is provided inside the notch and opened in the radial direction of the delivery drum. The apparatus has a plurality of suction holes, and pressure switching means connected to the suction holes for stopping the envelope by suction of the envelope by the suction holes and separating the envelope by blowing air from the suction holes. The notch is a suction surface arranged in a tangential direction parallel to the outer periphery of the delivery drum, and an envelope which is positioned in front of the suction surface in the transport direction and is arranged in a state parallel to the radial direction of the delivery drum and rotated and transferred. It has a shape having a bottom stop surface with which the bottom abuts. A plurality of suction holes are arranged at intervals on the suction surface, for example, in the axial direction of the rotation shaft, and are connected to a pressure switching hole formed in a side surface of the delivery drum by a pipe provided inside the delivery drum. You. The pressure switching means is located on the outer peripheral side of the side surface of the delivery drum and is provided with a pressure switching hole, and a pressure which is brought into contact with the contact part and is connected to the pressure means and the pressure reducing means. And a switching nozzle. The pressure switching nozzle has a configuration in which a pressure reducing nozzle and a pressure nozzle are integrated with each other, and the rotation axis of the delivery drum covers a part thereof along a rotation locus of a pressure switching hole provided on a side surface of the delivery drum. And is urged to the side of the delivery drum by the urging means. In the pressure switching nozzle, the contact side of the delivery drum with the contact portion is provided with a notch that fixes the envelope and the pressure reducing nozzle extends from the vertically upper position of the delivery drum where the pressure switching hole is located at the start of the conveyance to the downstream position in the rotational conveyance direction. And the notch is located near the alignment table. At the end of the transfer envelope, the pressure switching hole is located near the end of the pressure reducing nozzle. Sealing means such as packing is arranged around the periphery, a pressure reducing nozzle and a pressure means are connected to the pressure reducing means and the pressure means via a pipe, and the pressure switching nozzle is fixed by a fixed position adjusting means connected to the pipe. The fixed position can be adjusted with respect to the rotation direction of the delivery drum.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bag making machine according to the present invention will be described below with reference to the drawings. 1 to 6, reference symbol M denotes a bag making machine, R denotes bag paper, B denotes a bag (envelope), C denotes a cut section, 1 denotes a paper feed section, 2 denotes a printing section, 3 denotes a drying section, and 4 denotes a drying section. A cutter unit, 5 is a folded attachment unit, 6 is a cut-off bottom attachment unit, and 7 is a delivery unit.

As shown in FIGS. 1 to 6, a bag making machine M includes a paper feeding section 1 for supplying continuous bag paper R in a roll shape, and a zip code frame or a company name or the like provided on the bag paper R. A printing section 2 for performing printing, a drying section 3 for drying bag paper R printed by the printing section, a cut-back portion C from the bag paper R, and a side turn-back portion B1 and a bottom turn-back portion B2.
And the side folded portion B1 is connected to the folded line L1.
Fold-back processing unit 5 for folding back and gluing and pasting, and separation bottom bonding for cutting the folded bag paper R from the cutting line L2 and folding the bottom fold part B2 from the bottom fold line L3 for bottom bonding. And a delivery unit 7 for aligning the bag (envelope) B on which the bottom is applied and counting the number of products to be manufactured.

[0009] As shown in FIG.
, And continuously supplies roll-shaped bag paper R having a predetermined width dimension.
Is set so that a minimum width of about 120 mm can be supplied.

As shown in FIG. 1, the printing unit 2 performs printing in, for example, yellow, blue, red, and black on bag paper R, and ink tanks 21 corresponding to the respective inks.
Relay roller 22, print roller 23, and print roller 23
A plurality of printing units 2A each having a receiving roller 24 are arranged along the conveying direction of the bag paper R, and these printing units 2A can selectively set a printing state and a non-printing state.

As shown in FIG. 1, the drying section 3 includes a cover 31 for drying the bag paper R inside, for example,
Blower 32 for blowing air into the inside of the cover 31
Is provided.

As shown in FIG. 1, the cutter section 4 cuts a cut section C shown in FIG.
And a bottom folded portion B2, and a cut portion C
A die roll 41 having a blade shape corresponding to the shape of
And a bar-shaped anvil roll 42, for example, made of ceramic, and a dust discharging means (not shown) for discharging the cut portion C that has been cut out.
The die roll 41 and the anvil roll 42 have a plurality of envelopes B.
A plurality of sets can be installed according to the shape.

[0013] As shown in FIG.
A gluing portion 51 having, for example, a glue nozzle or the like for gluing the side folded portion B1; a scoring roller 52 engraving a folded line L1 for folding the side folded portion B1 formed by the cutter portion 4; A plurality of transport rollers 53 for transporting the paper R, a folded portion 54 such as a folding plate disposed on the transport roller 53 and folding the side folded portion B1, and a folded bag paper R
And a press roller 55 for pressing and bonding.

As shown in FIG. 1, the separated bottom attaching portion 6 is formed by a bottom reinforcing roll 61 for engraving a bottom return line L3 for returning the bottom return portion B2, and the folding back attaching portion 5. A cutter roll 62 for separating the bag paper R having the folded portion B1 stuck from the cutting line L2, a bottom gluing portion 63 having, for example, a gluing roller for gluing the bottom folded portion B2;
A bottom folding drum 64 for folding back the bottom folded portion B2, and the bottom folding drum 64 adsorbs the vicinity of the bottom folded line L3 of the bag paper R into the suction groove portion arranged on the outer periphery in the axial direction. , The bottom turn-back portion B2 is turned back and attached.

As shown in FIGS. 1 to 6, the delivery section 7 includes a delivery drum 71 for rotatingly transferring the envelope B formed by the separation bottom sticking section 6, and a delivery drum 71.
1. Alignment table 72 for aligning envelope B rotated and transferred by 1.
And a counter (not shown) for counting the formed envelopes B, and a counter unit 8 for moving the envelopes laterally with respect to the alignment position when the predetermined number of envelopes B are conveyed.

As shown in FIGS. 2 and 3, the delivery drum 71 has a rotating shaft 71a connected to driving means (not shown) and driven to rotate, and an outer periphery 7 of the delivery drum 71.
Holding means 7 for holding envelope B in 1A and rotating and transferring it
The outer periphery 71A of the delivery drum 71 is provided with claw grooves 71b arranged in the circumferential direction corresponding to the peeling claws 72A provided on the alignment table 72, for example, two stripes. Is done. The alignment table 72 is provided for the delivery drum 7.
1, a separating claw for separating the transported envelope B from the delivery drum 71 and aligning it on the aligning table 72 at the end of the aligning table 72 on the side of the delivery drum 71. 72A and a movable equal 72B for aligning the envelope B on the upper side of the aligning table 72, and the tip of the peeling claw 72A has a claw groove 71b as shown in FIG.
It is located inside and from the rotation shaft 71a of the delivery drum 71 from the bottom of a notch 74 described later. Holding means 73
As shown in FIG. 2 and FIG. 3, the outer circumference 71A of the delivery drum 71
a, a plurality of suction holes 75 located inside the cutout 74 in the radial direction of the delivery drum 71, and a pressure switching means 76 connected to the suction hole 75. It has the following. The notch 74 includes an adsorbing surface 74a disposed in a state parallel to a tangential direction on an outer periphery 71A of the delivery drum 71, and the adsorbing surface 74a.
And a bottom stop surface 74b with which the bottom of the envelope B, which is disposed in front of the transfer direction in the radial direction of the delivery drum 71 and is parallel to the radial direction of the delivery drum 71 and is rotatably transported, abuts. A plurality of suction holes 75 are arranged on the suction surface 74a at intervals in the axial direction of the rotating shaft 71a, for example, and a pressure switching hole 75A formed in the side surface 71B of the delivery drum 71.
75a provided inside the delivery drum 71
Connected by As shown in FIGS. 2 and 3, the pressure switching means 76 is located on the outer peripheral side of the side surface 71B of the delivery drum 71 and has a contact portion 71C provided with the pressure switching hole 75A.
And a pressure switching nozzle 77 which is brought into contact with the contact portion 71C and is connected to a pressure means and a pressure reducing means (not shown). The pressure switching nozzle 77 has a configuration in which the decompression nozzle 77A and the pressure nozzle 77B are integrated, and covers a part thereof along the rotation locus of the pressure switching hole 75A provided in the side surface 71B of the delivery drum 71. Is arranged at a position equidistant from the rotation shaft 71A of the delivery drum 71, and is urged by the urging means 77C against the contact portion 71C of the side surface 71B of the delivery drum 71. In the pressure switching nozzle 77, the contact side of the delivery drum 71 with the contact portion 71C is, as shown in FIG.
The notch 74 fixes the envelope B and starts the pressure switching
A pressure reducing nozzle 77A is formed from the vertical upper position of the delivery drum 71 where the 5A is located to the downstream position in the rotational transport direction, and the pressure reducing nozzle 77 where the cutout 74 is located at the pressure switching hole 75A at the end of the transport envelope located near the alignment table 72.
The pressure nozzle 7 is located at the downstream position in the rotational conveyance direction from the vicinity of the end of A.
7B, sealing means such as packing (not shown) is arranged around the respective contact surfaces, and a pressure reducing nozzle 77 is provided.
A is connected to the pressure reducing means via a pipe 77a, the pressurizing nozzle 77B is connected to the pressurizing means via a pipe 77b, and the pressure switching nozzle 77 is a fixed position adjusting means 77c to which the pipes 77a and 77b are connected. Thereby, the fixed position can be adjusted with respect to the rotation direction of the delivery drum 71.

As shown in FIGS. 2 to 5, the counter portion 8 has a slide portion 81 disposed on the suction surface 74a of the notch 74, and a side portion of the delivery drum 71 which is integrally connected to the slide portion 81. A bracket 82 projecting substantially parallel to the rotating shaft 71a;
A cam follower 83 which is located at the tip and is rotatably attached when the delivery drum 71 rotates, a cam 84 which comes into contact with the cam follower 83 to slide the slide portion 81 in the direction of the rotation shaft 71a, and a cam follower 8 of the cam 84
Cam position setting unit 85 for setting the contact state with the cam 3
And a control unit (not shown). The slide portion 81 is slidably attached to the inside of the notch 74 by a long hole 81b fixed with a screw 81a or the like,
On its surface, a plurality of suction holes 75 penetrated substantially parallel to the radial direction of the delivery drum 71, and the inside of the claw groove 71b of the delivery drum 71 in which the peeling claw 72A rotates even when the slide portion 81 slides. Claw groove 8 to enable
1c. The through hole 75 can be connected to the tube 75a even when the slide portion 81 slides. As shown in FIG. 4, the bracket 82 is provided with biasing means such as a spring for biasing the slide portion 81 toward the cam 84. As shown in FIGS. 2 to 5, the cam 84 has a flat plate shape positioned substantially parallel to the side surface 71B of the delivery drum 71, and the upper side of the cam 84 is directed downward from above for guiding the cam follower 83. An inclined portion 84A that is inclined toward the delivery drum 71 is provided. Cam position setting section 8
5 is provided with a guide 85A for setting the moving position of the cam 84 and supporting the cam 84, and a drive unit (not shown) which is, for example, a solenoid. As shown in FIG. , The slide portion 81 is urged to be located on the cam 84 side, the envelope B is located at the alignment position of the delivery drum 71, and the cam 84 is
5 and a cam follower 83 abutting against the cam 84 causes the sliding portion to be in contact with the cam 84, as shown in FIG.
The control unit (not shown) switches between the state in which the envelope B is pressed to the opposite side to move the envelope B from the alignment position of the delivery drum 71 to the side opposite to the cam 84 and the cam 84 abuts on the cam follower 83. It is possible.

In the bag making machine M having such a configuration, the paper feed unit 1 continuously supplies roll-shaped bag paper R having a predetermined width, and the printing unit 2 outputs yellow, blue and the like. ,
Red and black printing is performed on the bag paper R, the drying unit 3 positions the bag paper R printed by the printing unit 2 inside the cover 31, and blows air into the cover 31 with the blower 32. The bag paper r is dried, and the cut portion C is cut from the bag paper R by the die roll 41 and the anvil roll 42 of the cutter unit 4, and the side folded portion B1 and the bottom folded portion B are cut.
In the folding and pasting unit 5, the gluing unit 51 glues the folded side folded portion B 1, and the creased roller 52 folds the side folded portion B 1 formed by the cutter unit 4. The line L1 is engraved, the bag paper R is transported by the transport roller 53, the side folded portion B1 is folded by the folded portion 54 disposed on the transport roller 53, and the bag paper R folded by the press roller 55 is pressed. In the bottom attachment section 6, a bottom return line L3 for folding back the bottom return section B2 by the bottom roll 61 is engraved.
The bag paper R to which the side folded portion B1 is bonded is cut off from the cutting line L2 by the cutter roll 62, glued to the bottom folded portion B2 by the bottom gluing portion 63, and the bottom folded portion B2 is folded back by the bottom folding drum 64 and stuck. To form an envelope B.

The formed envelope B is rotationally transferred by the delivery drum 71 of the delivery section 7 and aligned on the aligning table 72. At this time, the depressurizing nozzle 77A is connected to the reducing means via the pipe 77a, and the switching nozzle 77 is moved by the urging means 77C to the contact portion 71 on the side surface of the delivery drum 71.
C, the inside of the decompression nozzle 77A is in a negative pressure state.
b, the switching nozzle 77 is connected to the pressurizing means,
Since the urging means 77C urges the contact portion 71C on the side surface of the delivery drum 71, the pressurizing nozzle 77B
The inside is in a pressurized state. At the time of alignment by the delivery unit 7, as shown in FIG. 6A, when the delivery drum 71 transports the envelope B by the separation bottom attaching unit 6,
The notch 74 of the holding means 73 is located at the top position. In this state, the pressure switching hole 75A provided in the side surface 71B of the delivery drum 71 is located in the pressure reducing nozzle 77A portion of the switching nozzle 77, and the notch 74
The suction hole 75 has a pipe portion 75a provided inside the delivery drum 71 and a side surface 71B of the delivery drum 71.
6 is connected to the negative pressure state inside the decompression nozzle 77A through the pressure switching hole 75A opened in FIG.
As shown in (b), the envelope B is cut out by the suction hole 75.
4 and the bottom of the envelope B is
b is fixed as a contact state. Next, as shown in FIG. 6C, when the delivery drum 71 rotates,
The pressure switching hole 75A is provided with the pressure reducing nozzle 77 of the switching nozzle 77.
Since the envelope B is located at the portion A, the envelope B is rotationally transferred according to the rotation of the delivery drum 71. In accordance with the rotation of the delivery drum 71, as shown in FIG. 6D, when the pressure switching hole 75A is located at the pressurizing nozzle 77B portion of the switching nozzle 77, the suction hole 75 of the notch 74 is moved to the delivery drum 71. Is connected to the pressurized state inside the pressurizing nozzle 77B via a pipe portion 75a provided inside the pressurizing nozzle 77B via a pressure switching hole 75A formed in a side surface 71B of the delivery drum 71. The ejection of air to the air is started. Further, at this time, the envelope B formed by the separation bottom pasting portion 6 is fixed to the notch 74 located near the top of the delivery drum 71. Then, as shown in FIG. 6E, the envelope B is moved by the tip of the peeling claw 72A located inside the claw groove 71b.
While being separated from 1 and positioned on the alignment table 72,
The fixing of the envelope B to the notch 74 is released by the air ejected from the suction hole 75, and the envelope B moves to the movable equal side 72B side of the alignment table 72. Further, FIG.
As shown in (f), by continuously arranging the envelopes B formed by the cut-off bottom sticking portions 6 on the alignment table 72, the envelopes B are aligned, and at the same time, by a counter (not shown). The number of the aligned envelopes B is counted.

When the envelope B is aligned, the cam 84 is not in contact with the cam follower 83 as shown in FIG.
Is energized by the energizing means 82A of the bracket 82 and is positioned on the cam 84 side, and the envelope B is positioned at the alignment position of the delivery drum 71. When a predetermined number of envelopes B set in advance by a counter (not shown) are aligned, while the delivery drum 71 is rotating, the control unit (not shown) controls the cam position by a driving unit that is, for example, a solenoid of the cam position setting unit 85. 84 is driven to protrude toward the delivery drum 71 and is brought into a position where it contacts the cam follower 83. Then, as shown in FIG. 5, the cam follower 83 rotates according to the rotation of the delivery drum 71, and the cam follower 83 moves along the shape of the cam 84 after coming into contact with the inclined portion 84A of the protruding cam 84. Thereby, the bracket 82 overcomes the urging force of the urging means 82A and moves to the opposite side of the cam 84. This bracket 82
As a result, the slide portion 81 integrated with the bracket 82 moves in the same direction according to the shape of the elongated hole 81b. At this time, since the suction hole 75 is connected to the pipe portion 75a even at the slide position of the slide portion 81, the suction hole 75 is fixed by the suction hole 75 at the same time as the slide portion 81 slides as shown in FIG. Envelope B is cam 84
Move to the opposite position. In this state, the delivery drum 71 rotates, and as shown in FIG. 6E, the envelope B is moved from the delivery drum 71 by the tip of the peeling claw 72A positioned inside the claw groove 71b or the claw groove 81c. In order to release the envelope B from the suction hole 75 and release the fixing of the envelope B to the notch 74 by the air ejected from the suction hole 75 and move the envelope B to the movable equal 72B side of the alignment table 72, In this case, the envelope B protrudes only one sheet in the lateral direction from the envelope B positioned at the aligned position. As a result, the envelopes B arranged in a predetermined number every predetermined number protrude in the lateral direction, and Etc. can be performed.

[0021]

According to the bag making machine and the bag making method of the present invention, the following effects can be obtained. (1) In the delivery section, the envelope is fixed to the delivery roller by the suction hole connected to the pressure reducing means, and the envelopes are aligned without being caught by the catching claw. it can. (2) Since the pressure switching nozzle connected to the pressure switching hole is switched to the pressure reducing nozzle and the pressure nozzle by the rotation of the delivery roller, the fixing of the envelope is performed only at the rotation position of the delivery roller. Regardless, the envelopes can be aligned, and the reliability of the alignment of the envelopes can be improved. (3) Envelopes are sucked and fixed by the suction holes, and the envelopes are released from the suction holes and air is blown out from the suction holes to align the envelopes. be able to. (4) Since the envelopes are aligned and counted a predetermined number by suction, the bag making speed can be improved, and as a result,
Workability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a bag making machine according to the present invention.

FIG. 2 is a perspective view showing a delivery unit in the bag making machine of FIG.

FIG. 3 is a front view showing a delivery unit in the bag making machine of FIG.

FIG. 4 is a development view showing an alignment state of envelopes in a delivery drum and a counter section of the delivery section in FIG. 2;

FIG. 5 is a development view showing a count state of an envelope in a delivery drum and a counter section of the delivery section in FIG. 2;

FIG. 6 is a process front view showing a delivery process in the delivery section of FIG. 2;

FIG. 7 is a plan view showing a method of making an envelope in a conventional bag making machine.

FIG. 8 is a perspective view showing a delivery section of a conventional bag making machine.

[Explanation of symbols]

 M: bag making machine R: bag paper B: bag body (envelope) B1: side folded part B2: bottom folded part C: cut part L1: folded line L2: cutting line L3: bottom folded line 1: feed unit 2 ... Printing unit 2A Printing unit 21 Ink tank 22 Relay roller 23 Printing roller 3 Receiving roller 3 Drying unit 31 Cover 32 Blower 4 Cutter unit 41 Die roll 42 Anvil roll 5 Folding unit 51 ... Glued part 52 ... Creased roller 53 ... Conveying roller 54 ... Folding part 55 ... Press roller 6 ... Separation bottom sticking part 61 ... Bottom streak roll 62 ... Cutter roll 63 ... Bottom glued part 64 ... Bottom folding drum 7 ... Delivery unit 71 Delivery drum 71A Outer periphery 71B Side surface 71C Contact part 71a Rotating shaft 71b Claw groove 72 Alignment table 72A Peeling claw 72B Moving equality 73 Holding means 4 Notch 74a Suction surface 74b Bottom stop surface 75 Suction hole 75a Tube part 75A Pressure switching hole 76 Pressure switching means 77 Pressure switching nozzle 77A Pressure reducing nozzle 77B Pressurizing nozzle 77C Urging means 77a 77b ... pipe 8 ... counter part 81 ... slide part 81a ... screw 81b ... long hole 81c ... claw groove 82 ... bracket 82A ... urging means 83 ... cam follower 84 ... cam 84A ... inclined part 85 ... cam position setting part 85A ... guide

Claims (9)

[Claims] 1. A bag making machine having a delivery drum for transferring a bag to an aligning table, wherein the delivery drum secures the bag by suction. 2. The bag making device according to claim 1, wherein a notch substantially parallel to a rotation axis of the delivery drum is provided on an outer periphery of the delivery drum, and a suction hole is formed inside the notch. Machine. 3. A notch has a suction surface on the outer periphery of the delivery drum that is substantially parallel to a tangential direction, and a bottom stop surface located in front of the suction surface in a conveying direction and standing from the suction surface in a radial direction of the delivery drum. The bag making machine according to claim 1, wherein the bag making machine has a shape having: 4. A pressure reducing means for sucking the bag by the suction hole and fixing the bag to the delivery drum, and releasing gas from the suction hole by releasing the bag near the alignment table. The bag making machine according to any one of claims 1 to 3, further comprising a pressure switching unit including a pressurizing unit for aligning the bag body. 5. The pressure switching means includes: a contact portion provided with a pressure switching hole formed in a side surface of a delivery drum to which the suction hole is connected; And a pressure switching nozzle connected to a pressure reducing means, wherein the contact portion is located on an outer peripheral side of a side surface of the delivery drum, and a pressure switching hole is provided. The bag making machine described. 6. The pressure switching nozzle is provided with a pressure reducing nozzle and a pressure nozzle, which are arranged so as to cover a part thereof along a rotation locus of a pressure switching hole provided on a side surface of the delivery drum. 6. The bag making machine according to claim 5, wherein the bag making machine is arranged at a position equidistant from the rotation axis of the delivery drum and can be connected to a pressure switching hole of the delivery drum. 7. In the pressure switching nozzle, a notch is provided on a contact side of the delivery drum at a contact portion with a contact portion of the delivery drum. The pressure nozzle is located at a position downstream from the vicinity of the end of the pressure-reducing nozzle where the pressure switching hole is located at the end of the transport envelope whose notch is located near the alignment table in the rotational transport direction. The bag making machine described. 8. A pressure switching nozzle, wherein a sealing means is provided around the contact surface side of the pressure switching nozzle, and the pressure switching nozzle is urged by an urging means to be pressed against the contact portion of the delivery drum. 8. The bag making machine according to any one of 5 to 7. 9. The pressure switching nozzle according to claim 5, wherein the fixed position can be adjusted with respect to the rotation direction of the delivery drum by a fixed position adjusting means to which a pipe is connected. The bag making machine according to any one of the above.