JPS6241932B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a packaging machine that performs a series of packaging operations within a closed chamber that isolates a required space from outside air.

Conventional technology and its problems This type of machine, for example,
As disclosed in Publication No. 58583, a sterile room is provided that surrounds a container transport conveyor, and the interior of the sterile room is separated by a partition wall into a rear chamber in the order in which the containers are transported by the conveyor. It is known that the container is partitioned into an intermediate chamber and a front chamber, in which a container supply device is disposed in the rear chamber, a container sterilizing and drying device is disposed in the intermediate chamber, and a filling device is disposed in the front chamber.

This conventional machine has the advantage of being able to perform a series of packaging operations as well as sterilizing and drying the containers in a sterile room, making the entire machine compact. However, on the other hand, it has the following problems: be. That is, in conventional machines, if the conveyor is contaminated by bacteria that have adhered to containers and been carried into the sterile room, the contamination will spread through the conveyor to each room in the sterile room.

An object of the present invention is to provide a packaging machine capable of achieving completely sterile packaging, including solving the above-mentioned problems.

Means for Solving the Problems A packaging machine according to the present invention includes an endless conveyor,
A rotor disposed above the starting end of the conveyor path and having a plurality of mandrels, a sealed main chamber surrounding the entire conveyor and rotor, and a cylindrical container disposed sequentially from rear to front on the top wall of the main chamber. A series of devices for closing and filling the bottom of the blank by folding and crimping the bottom, the part of the devices working for the blank extending into the main chamber. In the packaging machine, a drying chamber is installed at the rear of the main chamber in communication with the main chamber, a sterilization chamber is installed at the rear of the drying chamber in communication with this, and a drying conveyor is installed in the drying chamber, A hot air blowing nozzle is arranged along the conveyance path, a sterilization conveyor is arranged in the sterilization chamber, and a sterilization liquid spray nozzle is arranged along the conveyance path, and both the drying chamber and the sterilization chamber are provided with a sterilization conveyor. Additionally, a blank delivery device is disposed that receives the cylindrical blank from a blank supply device disposed at the rear of the sterilization chamber and sequentially passes the cylindrical blank to the rotor via a drying conveyor and a sterilization conveyor. It is something.

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

The packaging machine described below is multi-rowed into two rows. The devices making up each column are identical. Identical parts are designated by the same reference numerals throughout the drawings.

In packaging machines, paper blanks formed into a cylindrical shape are used as packaging bodies. Thermoplastic synthetic resin layers are formed on both the inner and outer surfaces of the blank.

As shown in FIGS. 1 and 2, the packaging machine includes an endless conveyor 1, a horizontal rotating shaft 2, and eight conveyor belts arranged radially around the endless conveyor 1 and above the starting end of the conveyance path of the conveyor 1. A rotor 4 having a mandrel 3 is provided. The conveyor 1 and rotor 4 are driven intermittently in synchronization. Although not shown in detail, the conveyor 1 includes a pair of chains 5 circulating in a horizontal plane, a number of holders 6 attached to the chains 5 at regular intervals, and a rail 7 that receives and guides the bottom of a bottomed cylindrical blank C. It is equipped with By this conveyor 1, the blank C is conveyed from the rear to the front as shown by arrow A in the figure. The rotor 4 is rotated counterclockwise in the figure. The entire conveyor 1 and rotor 4 are surrounded by a sealed main chamber 8. Main chamber 8
The interior of the device is filled with clean air that is sterilized to a degree that virtually guarantees a useful product life. A series of devices 9 are arranged on the top wall of the main chamber 8 from rear to front. That is, device group 9
are first and second bottom heaters 10, which sequentially heat the ends of the cylindrical blank C that are to become the container bottom;
11, and a bottom breaker 1 with the same end folded flat.
2, a bottom sealing device 13 for crimping the flattened ends of the same, and a primary top breaker 14 for forming a crease to make it easier to fold the end of the cylindrical blank C into a roof shape, which is to become the top of the container. and a filling device 15 for filling the bottomed cylindrical blank C with a predetermined amount of contents; The secondary top breaker 16 is finally folded into a roof shape, the top heater 17 heats the folded end, and the top sealing device 18 crimps the end, all of which are known. It is. Among the device group 9, the primary bottom heater 10, the secondary bottom heater 11, the bottom breaker 12, and the bottom seal device 13 are arranged to correspond to the mandrel stop position. The operating portion of the device group 9 for the blank C is the main chamber 8.
It's growing inside. Although the parts of the main chamber 8 through which the operating parts of the device group 9 are inserted are not shown in detail,
A bellows is used for the part where the operating part performs reciprocating linear motion, and an oil seal or a mechanical seal is used for the part that performs rotational motion to completely block ventilation inside and outside the chamber 8. A chamber cleaning and sterilizing device 19 is arranged within the main chamber 8 . The main chamber 8 is also equipped with a clean air supply device 20 .

A sealed auxiliary chamber 22 is installed in communication with the rear of the main chamber 8 via a duct 21.
A blank sterilizer 23 and a blank transfer device 24 are arranged within the subchamber 22. Further, a blank supply device 25 is arranged outside the subchamber 22. The entire blank supply device 25 is surrounded by a rear chamber 26, but the rear chamber 26 is not of a closed structure like the main chamber 8 and the sub-chamber 22. The blank supply device 25 has a magazine 27 that stores in a stack a large number of flatly folded blanks C that can be formed into a rectangular tube shape, and the blanks C folded flat from the magazine 27 are formed into a rectangular tube shape. This is a well-known method in which it is taken out while being spread out. As will be described in detail later, the blank delivery device 24 receives the blank C formed into a cylindrical shape from the blank forming and supplying device 25 and supplies it to the blank sterilization device 23, and also supplies the sterilized cylindrical blank C from the blank sterilization device 23. is received and passed to the rotor 4.

As shown in FIGS. 3 and 4, the chamber cleaning and sterilizing device 19 includes a cleaning liquid spray nozzle 28, a cleaning liquid spray ball 29, and a sterilizing liquid spray nozzle 30, which are arranged at required locations in the main chamber 8. By operating the conveyor 1 while spraying the cleaning liquid from the cleaning liquid spray nozzle 28 and the ball 29, the inside of the conveyor 1 and the main chamber 8 can be automatically cleaned. Furthermore, by spraying a disinfectant from the spray nozzle 30, the inside of the conveyor 1 and the main chamber 8 can be sterilized. As a disinfectant, 35% hydrogen peroxide solution is used.

FIG. 5 shows the clean air supply device 20. FIG.

A finished container outlet 31 is provided at the front of the main chamber 8, and a blank supply port 32 is provided at the rear of the subchamber 22. These discharge ports 31 and supply ports 32 are provided with lids 33 and 3, respectively.
4 is provided so that it can be opened and closed freely. Air supply pipes 36 extending from an air generator 35 and branching off are connected to the main chamber 8 and the sub-chamber 22, respectively. A check valve 37 is provided at each branched portion of the air supply pipe 36 . The air generator 35 includes an intake filter 38 and an electric blower 3.
9, a sterilization filter 40 and a heater 41. Further, air exhaust pipes 42 are connected to appropriate locations of the main chamber 8 and the subchamber 22. The air exhaust pipe 42 is provided with an on-off valve 43 . Furthermore, the clean air supply device 20 is equipped with a detector 44 for detecting the pressure within the main chamber 8 .
When the detected pressure becomes lower than the set pressure, the air generator 35 is activated based on the output signal of the detector 44. Although not shown in FIG. 5, a portion of the air supply pipe 36 is also led to the blank sterilizer 23 (see FIGS. 6 to 8).

During steady operation of the packaging machine, the air generator 35
Clean air is constantly supplied from Thereby, the insides of both chambers 8 and 22 are maintained at positive pressure. This prevents outside air from flowing into both chambers 8, 22, and can prevent contamination caused by air flowing from outside into both chambers 8, 22.

When the operation of the packaging machine is stopped, such as at night, if the lids 33 and 34 are closed and the on-off valve 43 of the discharge pipe 42 is closed, even if the operation of the air generator 35 is stopped, the supply pipe 36 is automatically closed by the check valve 37, the insides of both chambers 8 and 22 are maintained at positive pressure. The supply pipe 36 is blocked from both chambers 8 and 22 by a check valve 37 and is isolated from the atmosphere by a sterilization filter 40.
is never contaminated. For this purpose, the supply pipe 36
routine sterilization work is not required. If the pressure in both chambers 8, 22 decreases due to some reason, the detector 44 detects this and the electric blower 39 is activated. As a result, the insides of both chambers 8 and 22 are always maintained at a predetermined positive pressure value.

6 to 8 show details of the subchamber 22 and the blank sterilizer 23.

The secondary chamber 22 has a drying chamber 46 with a blank outlet 45 leading into the main chamber 8 at the front.
The front part connects to the drying chamber 46 through the communication port 47.
It consists of a sterilization chamber 49 communicating with the sterilization chamber 49 and having a blank inlet 48 at the rear thereof, and a pressurized chamber 50 covering the opening of the sterilization chamber 49 containing the blank inlet 48 . The drying chamber 46 has a flat box shape with a thickness in the front and back direction, and a blank outlet 45 is provided in the front wall thereof. One end of the air supply pipe 36 and the air exhaust pipe 42 are connected to the top wall of the drying chamber 46 . The sterilizing chamber 49 has a horizontal bottomed cylindrical shape with an open front end, and the open end is brought into close contact with the rear wall of the drying chamber 46 so as to serve as one closed wall. The blank inlet 48 of the sterilization chamber 49 is located on the rearward extension of the communication port 47. The pressurizing chamber 50 is box-shaped with an open front end and has a size that can cover the sterilizing chamber 49 with a required space.
The opening end is brought into close contact with the rear wall of No. 6 so as to serve as one of the closing walls. This pressure chamber 50
The above-mentioned blank supply port 32 is provided on the rear wall of the machine. One end of the air supply pipe 36 is also connected to the top wall of the pressurizing chamber 50 .

The blank sterilizer 23 includes a drying conveyor 51 disposed in the drying chamber 46, a sterilization conveyor 52 disposed in the sterilization chamber 49, a hot air blowing nozzle 53 disposed in the conveyance path of the former conveyor, and the latter. A sterilizing liquid spray nozzle 54 for blank sterilization is arranged on the conveyor conveyance path.

The drying conveyor 51 has driving and driven sprockets 55 and 56 that are arranged vertically at a predetermined interval and have rotation centers extending in the front and back direction.
, an endless chain 57 wound around both sprockets 55 and 56, and a large number of drying blank holders 58 attached to the endless chain 57 at regular intervals. Each holder 58
A drying conveyor 51 is arranged in the drying chamber 46 such that the conveyor 51 moves past a position facing the blank outlet 45 and the communication port 47. The sterilization conveyor 52 has a horizontal rotating shaft 59 extending in the front-rear direction.
and four sterilization blank holders 60 attached at regular intervals around this. Each holder 60 has a communication port 47 and a blank inlet 48
A sterilization conveyor 52 is disposed within the sterilization chamber 49 so as to be movable past a position facing the sterilization chamber 49. Blank holder 5 for drying and sterilization
8 and 60 both have the same shape, so that the cylindrical blank C is held in a horizontal position and its movement in the vertical direction is restricted, but it is free to move in the front and back direction.
It is provided with a plurality of horizontal pieces arranged so as to be bent at the corners of the cylindrical blank C.

The hot air blowing nozzles 53 are attached to hot air supply pipes 61 extending vertically within the drying chamber 46 at intervals equal to the attachment intervals of the drying blank holders 58. The outlet is oriented in the axial direction of the blank holder 58. The upper end of the hot air supply pipe 61 is connected to the drying chamber 4 through an insulating cylinder 62.
It penetrates the top wall of 6 and protrudes above it. An air supply pipe 36 is connected to the projecting end, and a burner 63 is attached thereto.

The blank sterilizing sterilizing liquid spray nozzle 54 is attached to the bottom of the rear-facing bottomed cylinder 64. This cylindrical body 64 is attached to the drying chamber 46 so that it is located on the forward extension line of the sterilizing blank holder 60 when the sterilizing blank holder 60 hangs down from the horizontal rotating shaft 59.
It is provided in the drying chamber 46 so that it crosses the inside in the front-back direction and its opening faces the sterilization chamber 49 . Thereby, the outlet of the spray nozzle 54 is oriented in the axial direction of the blank holder 60.

Driving sprocket 55 of drying conveyor 51
is fixed to a rotating shaft 65 extending in the front-rear direction inside the drying chamber 46. The front end of this rotating shaft 65 penetrates the front wall of the drying chamber 46 and projects to the outside, and a pulley 66 is fixed to the projecting end. A belt 67 is wound around this pulley 66 and a pulley fixed to an output shaft of a prime mover (not shown). The belt 67 drives the drying conveyor 51 intermittently so that the drying conveyor 51 can be stopped at a position where the holder 58 faces the blank outlet 45 and the communication port 47. On the other hand, the horizontal rotation shaft 59 of the sterilization conveyor 52 is supported on the rear wall of the drying chamber 46 via a cylindrical body 68 attached thereto. The front end of the horizontal rotating shaft 59 projects into the drying chamber 46, and a drive sprocket 69 is fixed to the projecting end. This sprocket 69 is engaged with the endless chain 57 so that the blank holder 60 of the sterilization conveyor 52 can be stopped at a position facing the communication port 47 and the blank outlet 48. As a result, the sterilization conveyor 52 is replaced by the drying conveyor 51.
It is driven intermittently in synchronization with the The driving interval is 90 degrees for one pitch of rotation of the holder 60.
Further, a blank guide 70 is provided in the duct 21 in front of the drying chamber 46 so as to face the blank outlet 45 , and a blank guide 71 is provided in the pressure chamber 50 behind it so as to face the blank inlet 48 of the sterilization chamber 49 . is provided. Both blank guides 70 and 71 have substantially the same shape as the blank holders 58 and 60.

Further, an air exhaust pipe 42 extending through the drying chamber 46 and the pressurizing chamber 50 is connected to the lower part of the sterilization chamber 49 . By quickly supplying clean air into the pressurized chamber 50 through the air supply pipe 36 and quickly discharging the air inside the sterilization chamber 49 through the air exhaust pipe 42, The interior of pressurized chamber 50 is maintained at a higher pressure than the interior of sterilization chamber 49 . Therefore, the air inside the sterilizing chamber 49 cannot flow out into the pressurizing chamber 50. Therefore, the germicidal agent sprayed into the sterilization chamber 49 is discharged together with the air discharged from the air discharge pipe 46. This prevents air pollution by disinfectants.

6, 9 and 10 show details of the blank transfer device 24. FIG.

The blank delivery device 24 includes a pressurizing chamber 5
A pair of upper and lower horizontal guide rods 72 extend in the front-rear direction from the side of the sterilization chamber 49 inside the sterilization chamber 49;
A carriage 74 is movably supported via rollers 73, and a pair of upper and lower carriages are rotatably supported in parallel with each other at a predetermined distance via brackets 75 and 76 above and below the carriage 74, and extend in the front-rear direction. The lower claw shafts 77 and 78, the upper claw 79 fixed to the upper claw shaft 77, and the first and second lower claws 80 and 81 fixed at a predetermined distance from each other before and after the lower claw shaft 78. We are prepared.

Horizontal guide bar 72 is cantilevered against the rear wall of drying chamber 46 near its forward end. The distal end of a drive arm 83 is connected to the carriage 74 via a connection link 82. The drive arm 83 is supported by a horizontal shaft 84 extending in the left-right direction. By swinging the drive arm 83 by means not shown, the carriage 7
4 is reciprocated in the front and back direction along the horizontal guide rod 72. Most of the upper pawl shaft 77 extends into the drying chamber 46 through a through hole 85 drilled in the rear wall of the drying chamber 46 . The upper and lower claw shafts 77, 78 are connected by a pair of arms 86, 87 and a link 88 so as to mutually transmit rotational motion. The same arm 8 of the upper claw shaft 77
An operating arm 89 is fixed diagonally upward in front of 6. An elevating body 91 is connected to this arm 89 via a connecting member 90. The elevating body 91 is
It consists of an elevator rod 92, a pair of left and right horizontal guide rails 93 fixed to the lower end of the rod and extending in the front-rear direction, and a trolley 94 supported by these rails 93. The lifting rod 92 is raised and lowered by an air cylinder (not shown). The lifting rod 92 is connected to the rail 93
When raised and lowered together with the trolley 94, the actuating arm 89 swings via the connecting member 90, and the upper claw shaft 77 rotates accordingly. Upper claw shaft 7
7 is transmitted to the lower claw shaft 78 by a pair of arms 86, 87 and a link 88. When the upper and lower claw shafts 77 and 78 are both rotated in this manner, the upper claw 79, first lower claw 80, and second lower claw 81 fixed thereto are moved from the horizontal position as shown by solid lines and chain lines in FIG. It oscillates in a nearly vertical downward position. Also, sterilization chamber 49
A notch 95 is provided in the peripheral wall of , and the first and second lower claws 80 are inserted through this notch 95 .
81 is adapted to fit inside the sterilization chamber 49. When each claw 79, 80, 81 is swung, the upper claw 79 engages and disengages from the blank C held in the drying blank holder 58 that is stopped at a position facing the blank outlet 45 of the drying chamber 46. The first lower claw 80 can freely engage and disengage from the blank C held in the sterilizing blank holder 60, which is stopped at a position facing the communication port 47 and the blank inlet 48. It can be engaged with and disengaged from the waiting blank C to be held in the sterilization blank holder 60. This last blank C is held in the blank guide 71 within the pressurizing chamber 50 mentioned above. Further, another claw (not shown) is fixed in front of the upper claw 79 of the upper claw shaft 77. This nail is
This is for sending the blank C extracted from the drying blank holder 58 by the upper claw 79 further forward. This blank C is guided by a blank holder 70 in the duct 21 and sent forward. Furthermore, a horizontal bar 96 is attached to the carriage 74 and extends rearwardly below the lower pawl shaft 78. An engagement piece 97 is fixed to the rear end of the horizontal bar 96. The engaging piece 97 pulls the blank C sent from the blank supply device 25 to the forward and backward locomotion range of the second lower claw 81, that is, to the position where it is held by the blank guide 71. The blank C formed into a cylindrical shape by the blank feeding device 25 is sent forward by the engaging piece 97 and the second lower claw 81 and held in one of the sterilizing blank holders 60. At this time, the holder 60 is stopped on a horizontal line passing through the horizontal rotation shaft 59. When the sterilization conveyor 52 is driven one pitch, the blank C is moved to a position in front of the spray nozzle 54, and the disinfectant is sprayed from the spray nozzle 54, so that its inner and outer surfaces are uniformly sterilized. . Then, by driving the same conveyor 52 three pitches, the blank C sprayed with the sterilizing agent goes around the sterilizing chamber 49 and returns to its original position. At this stop position, the first lower claw 8
0, the blank C is removed from the sterilizing blank holder 60 and held in one of the drying blank holders 58. Another blank C is fed into the sterilizing blank holder 60 from which the same blank C has been removed by the second lower claw 81. The blank C held in the drying blank holder 58 is moved through the hot air blowing nozzle 5 while being moved inside the drying chamber 46.
It is sterilized and dried from step 3. When the blank C is carried around the drying chamber 46 to a stopping position two pitches before the original position in the transport direction, it is extracted from the sterilizing blank holder 58 by the upper claw 79 and sent forward. . The blank C thus removed from the drying blank holder 58 is held by a blank guide 70 and sent further forward to be supplied to the main chamber 8.

11 to 14 show the filling device 15. FIG.

The filling device 15 includes a filling liquid tank 98, a filling cylinder 100 connected to the bottom of the filling liquid tank 98 via a branch pipe 99 such that the upper end communicates with the filling liquid tank 98, and upper and lower ends of the filling cylinder 100. a metering cylinder 102 connected to the middle part of the filling cylinder 100 via a connecting pipe 101, and a filling nozzle 103 connected to the lower end of the filling cylinder 100.
It is equipped with

A liquid supply pipe 104 is connected to the filling liquid tank 98 . Further, cleaning liquid supply pipes 105 extending from the cleaning and sterilizing device 19 are connected to the filling liquid tank 98 and the metering cylinder 102, respectively. The filling nozzle 103 penetrates the top wall of the main chamber 8 and extends into it, and its lower end opening is located directly above the blank transfer path. Note that the filling operation is performed twice for each bottomed cylindrical blank C. For this purpose, two filling nozzles 103 are arranged adjacent to each other in the front and back along the blank conveyance path.

A liquid guide pipe 106 is provided below the filling nozzle 103 in the main chamber 8 . Liquid guide pipe 106
a vertical portion 107 supported by the main chamber 8 in a rotatable and vertically movable manner at a position spaced a predetermined distance from right below the filling nozzle 103 in the left and right direction;
The horizontal part 108 is integrally connected to the vertical part 107 and has a length corresponding to the above-mentioned distance. The lower end of the vertical portion 107 penetrates the bottom wall of the main chamber 8 via the cylindrical seal member 109 and projects to the outside thereof. A drain pipe 110 is connected to the seal member 109. On the other hand, a liquid receiver 111 is attached to the tip of the horizontal portion 108. The liquid receiver 111 has two adjacent filling nozzles 103.
Two nozzle connection ports 112 are opened upward correspondingly. Both nozzle connection ports 112 communicate with the liquid guide pipe 106. Nozzle connection port 112
An annular seal member 113 made of an elastic material is provided at the edge of the
is installed. Furthermore, a pair of engaging pieces 114 are provided on both sides of the liquid receiver 111 in a manner that projects upwardly and faces each other. Each engaging piece 114 has a U-shaped fitting portion 11 having a horizontal opening as shown in FIG.
5 is provided.

At the upper end of the vertical part 107 of the liquid conduit 106, there is a rotating operation shaft 116 that is connected in a straight line to the vertical part 107.
are connected. The rotary operation shaft 116 is slidably inserted through a guide tube 117 attached to the top wall of the main chamber 8 and projects upward therefrom. An operating handle 118 is attached to its protruding end. The operating handle 118 is received on the top wall of the main chamber 8 via a vertical cylindrical spacer 119 erected on the main chamber 8 and a horizontal disc-shaped sliding member 120 fixed to the upper end of the spacer 119 . By rotating the operation handle 118, the liquid receiver 1
11 is rotated in a horizontal plane.

On the other hand, near the filling nozzle 103, a lifting rod 121 is provided that extends upward from its lower end opening. A horizontally protruding engagement portion 122 extending in the left-right direction is integrally provided at the lower end of the lifting rod 121. Further, the upper end of the lifting rod 121 slidably passes through a guide tube 123 attached to the top wall of the main chamber 8 and projects upward therefrom, and further extends from the top wall of the main chamber 8 directly above the guide tube 123. A sliding guide plate 124 attached to the upper surface is slidably inserted therethrough and protrudes above the sliding guide plate 124 . A rectangular cylinder 125 is screwed to the protruding end. The left and right sides of the rectangular tube body 125 are supported by a pair of block-shaped elevation guide members 126 having the same thickness in the front-rear direction. There are protrusions 12 on the front and rear surfaces of the square cylinder body 125.
7 are each provided integrally. Each cylindrical body 125 and the elevation guide members 1 on both the left and right sides thereof
A pair of rectangular front and rear movable plates 128, which are long in the left-right direction, are mounted on the sliding guide plate 124, sandwiching the movable plate 26 from the front and back and using the front and rear surfaces as guide surfaces, so as to be movable in the left-right direction. Both movable plates 128 have protrusions 12.
Grooves 129 into which the number 7 is fitted are formed respectively. Each groove 129 is inclined upward to the right as shown in FIG. A screw body 130 is held at one end of both movable plates 128. One end of a threaded rod 132 supported by a bearing 131 on the top wall of the main chamber 8 is screwed into the threaded body 130 . Threaded rod 1
A rotating handle 133 is attached to the other end of 32.

When regular filling work is being performed, the horizontal portion 10 of the liquid guide pipe 106 is
8 faces in the front-rear direction.

When the filling operation is completed and the filling liquid is replaced, the liquid receiver 111 is rotated as described above so that it enters directly below the lower end opening of the filling nozzle 103. Then, the fitting part 115 of the engagement piece 114 is fitted into the engagement part 112 of the lifting rod 121. Thereby, the liquid receiver 111 is positioned directly below the filling nozzle 103 and engaged with the lifting rod 121. Then, when the rotation handle 133 is rotated,
The threaded rod 132 rotates, and the movable plate 128 moves to the left in FIG. 13 together with the threaded body 130 screwed thereon. Then, the groove 1 of the movable plate 128
29 pushes up the protrusion 127. As a result, the lifting rod 121 is pulled up together with the liquid receiver 111, and the connection port 112 of the liquid receiver 111 is connected to the lower end opening of the filling nozzle 103 via the sealing member 113 in an airtight manner. In this way, the filling liquid remaining in each part of the filling device 15 may be discharged. Furthermore, each part of the filling device 15 can be cleaned and sterilized by spouting a cleaning liquid or high-temperature steam from the cleaning liquid supply pipe 105 as needed. After use, the cleaning liquid or steam can be discharged in the same manner as the filling liquid. These operations of drawing out the filling liquid and cleaning and sterilizing the main chamber 8 can be performed from the outside of the main chamber 8 by operating the operation handle 118 and the rotary handle 133 while maintaining its airtightness. Therefore, there is no risk that the main chamber 8 will be contaminated by outside air.

Effects of the Invention In the packaging machine according to the present invention, a drying chamber 46 is installed at the rear of the main chamber 8 in communication with this, and a sterilization chamber 49 is installed at the rear of the drying chamber 46 in communication with this. A drying conveyor 51 is disposed within the drying conveyor 46, and hot air blowing nozzles 5 are installed along the conveyance path of the drying conveyor 51.
3 is arranged, a sterilizing conveyor 52 is arranged in the sterilizing chamber 49, and a sterilizing liquid spray nozzle 54 is arranged along the conveyance path of the sterilizing conveyor 52.
Both conveyors 51, 52 are damaged by the bacteria carried inside.
Even if the main chamber 1 is contaminated, the contamination
It never spreads.

Furthermore, a cylindrical blank C is received from the blank supply device 25 disposed at the rear of the sterilization chamber 49 so as to span both the drying chamber 46 and the sterilization chamber 49, and is transferred to the drying conveyor 51.
and the rotor 4 via the sterilization conveyor 52 sequentially.
A drying chamber 46 and a sterilization chamber 49 are arranged.
Since the blank C in the interior is cylindrical with both ends open, the sterilizing solution can be uniformly applied to the entire blank C including the bottom part which is folded and crimped in the blank C in the subsequent process, and it is easy to do so. It can be removed by drying and thus the blank C can be easily and completely sterilized. When trying to sterilize blank C after closing one end, the air flow containing hot air and sterilizing liquid blown against blank C becomes stagnant inside blank C.
It is not easy to uniformly apply the sterilizing liquid to the entire blank C. In particular, in the folded and crimped portion of the blank C, the unevenness caused by the folding remains, but the sterilizing liquid is difficult to adhere to the step part at the boundary of the unevenness, and there is a risk that the area may become unsterilized. be.

[Brief explanation of the drawing]

Figures 1 and 2 are side and front views of the packaging machine, Figures 3 and 4 are side views showing the arrangement of the chamber cleaning sterilizer, and Figure 5 shows the arrangement of the clean air supply equipment. 6 is a side view showing the inside of the sub-chamber, and is a perspective view of the blank sterilizer and delivery device, FIG. 7 is an enlarged vertical cross-sectional view of the sub-chamber showing the blank sterilizer portion, and FIG. 8 is a perspective view of the sub-chamber. 7 is a sectional view along the - line in FIG. 7, FIG. 9 is an enlarged vertical sectional view of the subchamber showing the blank transfer device portion, FIG. 10 is a sectional view along the - line in FIG. 9, and FIG. 11 is the filling device. Enlarged vertical cross-sectional view of the main chamber showing parts, No. 12
The figure is a cross-sectional view taken along the line XII-XII in Figure 11, Figure 13 is a cross-sectional view taken along the - line in Figure 12, and Figure 14 is a cross-sectional view taken along the line -
The figure is a view taken along the - line in FIG. 13. 1... Endless conveyor, 3... Mandrel, 4...
...Rotor, 8...Main chamber, 9...Device group, 2
4... Blank delivery device, 25... Blank supply device, 46... Drying chamber, 49... Sterilization chamber, 51... Drying conveyor, 52... Sterilization conveyor, 53... Hot air blowing nozzle, 54...
Sterilizing liquid spray nozzle, C...blank.

Claims (1)

[Claims] 1. An endless conveyor 1, a rotor 4 disposed above the starting end of the conveyance path and having a plurality of mandrels 3, a sealed main chamber 8 surrounding the entire conveyor 1 and rotor 4, A series of devices 9 arranged sequentially from the rear to the front on the top wall of the chamber 8 and for folding and crimping the bottom of the cylindrical container blank C to close the bottom and fill it with contents. In this packaging machine, the operating part for the blank C of the device group 9 extends into the main chamber 8, in which a drying chamber 46 is installed at the rear of the main chamber 8 in communication with this, and the drying chamber 4
A sterilization chamber 49 is installed at the rear of the drying chamber 46 in communication with the drying chamber 46, and a drying conveyor 51 is installed in the drying chamber 46.
are arranged, a hot air blowing nozzle 53 is arranged along the conveyance path thereof, a sterilization conveyor 52 is arranged in the sterilization chamber 49, and a sterilization liquid spray nozzle 5 is disposed along the conveyance path of the sterilization chamber 49.
4 is arranged in the drying chamber 46 and the sterilization chamber 49, and receives a cylindrical blank C from the blank supply device 25 arranged at the rear of the sterilization chamber 49, and transports it to the drying conveyor 51 and the sterilization conveyor 52. A packaging machine characterized in that a blank delivery device 24 is disposed that sequentially passes the blanks to the rotor 4 via the blanks.