JPH10114311A - Removing device of web sterilizing liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly position two squeeze rollers at closing positions. SOLUTION: A web sterilizing liquid removing device comprises a sterilizing liquid tank 51, a web transfer means which leads a web W into the sterilizing liquid tank 51 and dips the led web W into a sterilizing liquid in the sterilizing liquid tank 51 and discharges the web from the tank 51, and a pair of squeeze rollers 53 capable of opening and closing a web transfer route by pinching it after discharging from the tank 51. One of the squeeze rollers 53 is made to be a fixed roller and the other roller is made to be a movable roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging machine, and more particularly, to sterilizing a web-shaped packaging material web by immersing the web in a hydrogen peroxide solution, removing the hydrogen peroxide solution from the web, The web is gradually formed into a tube, and the inside thereof is filled with liquid while adhering both longitudinal edges thereof. Thereafter, the web is sealed and cut at an interval corresponding to one container, and formed to form a liquid packaging container. The present invention relates to a device for removing aqueous hydrogen peroxide from a web in a filling and packaging machine to be manufactured.

[0002]

2. Description of the Related Art As this type of apparatus, a web is passed between a pair of swingable rubber rollers called a squeeze roller to squeeze droplets on the web surface. To blow off droplets on the web surface (Japanese Patent Publication No. 44-20)
No. 556), a method in which a web is passed through a narrow gap between two partitioned rooms, and high-temperature, high-speed air is supplied to one of the rooms to evaporate droplets on the web surface (Japanese Patent Laid-Open No. 8-58740). And those using these together.

In an apparatus using a squeeze roller,
If the web breaks in front of the rollers, it is necessary to pass the web again between the rollers, and during such work, the rollers have been retracted to the open position relative to the web so as not to hinder the work.

[0004] Further, if a state where a strong pressure is applied to the web for a long time while the movement of the web is interrupted is maintained, the web is slightly compressed, the tensile strength of the web is reduced, and the web may be broken at the time of restart. In order to prevent this, the roller was similarly retracted.

[0005] The retracting of the rollers has been performed by swinging both rollers from a closed position to an open position.

Further, if a little dust or paper dust generated from the longitudinal end face of the web adheres to the roller surface,
In addition to the fact that the part cannot be pressed evenly, in the case of a roller located on the inner side of the web, paper dust and the like adhering to the roller are transferred to the web surface and mixed into the final product of the packaging container. In order to prevent this, the surface of the roller must be kept clean at all times, and regular inspection and cleaning of the roller is indispensable.

[0007] Inspection and cleaning of the roller has been carried out by removing the roller with the roller retracted to the open position for convenience of operation.

[0008]

When both rollers are retracted to the open position, inspected and cleaned, and then returned to the closed position again, depending on the intuition of a skilled worker, Adjusting the precise positioning of the rollers to the closed position has been extremely difficult. If the adjustment is not performed properly, for example, if the axes of both rollers are not parallel, the pressing force in the width direction of the transferred web becomes uneven. In this case, the droplets on the web surface are non-uniformly divided in the web width direction, and the removal effect by the air knife performed in the subsequent process becomes insufficient. Further, if the pressing force of the roller is not uniform, there is also a problem that the web after passing through the roller meanders.

If both rollers are not positioned at the predetermined closed position and the pressed portions of both rollers are shifted to either side from the predetermined web transfer path, the web is transferred along a path shifted from the predetermined transfer path. Will be. In this case, not only is excessive tension applied to the web, but the gap between the air knives and the web is not even, and the processing by the air knives is insufficient. In extreme cases, when the air knives and the web come into contact, the high- As a result, the polyethylene layer of the web is melted or softened, which causes a problem of lowering the quality of the web.

[0010] An object of the present invention is to provide a web sterilizing solution removing apparatus which solves the above-mentioned problems.

[0011]

A web sterilizing solution removing apparatus according to the present invention comprises a sterilizing solution tank, a web introduced into the sterilizing solution tank, and the introduced web immersed in the sterilizing solution in the sterilizing solution tank. In a web sterilizing solution removing device comprising a web transfer means for discharging from the sterilizing solution tank and a pair of squeeze rollers arranged to be openable and closable with the web transfer path after discharging from the sterilizing solution tank,
One of the squeeze rollers is a fixed roller, and the other is a moving roller.

When the moving squeeze roller is pressed against the fixed squeeze roller, both squeeze rollers are positioned at the closed position.

It is preferable that the squeeze roller corresponding to the inner side of the web, which is the inner side of the container, is a moving roller.

[0014] Of the inner and outer surfaces of the web, the squeeze roller corresponding to the inner surface of the web that refuses to adhere extraneous foreign matter can be intensively cleaned and inspected.

Both ends of the roller shaft of the dynamic squeeze roller
It is preferable that the distal end of the pair of vertically swinging support arms and the pair of holding pieces are sandwiched, and the distal ends and the holding pieces of both support arms are detachably fastened by a fastener.

If the tightening state by the tightening tool is released,
The squeeze roller can be removed from the support arm. The removed squeeze roller may be replaced with another squeeze roller that has been cleaned, or may be taken to a wide place and carefully cleaned. Therefore, chips and the like adhering to the outer surface of the squeeze roller can be completely removed. Preferably, the fastener comprises a pair of bolts which penetrate through the distal ends of both support arms and one of the holding pieces and are screwed into the other.

[0017] Since the distal ends of the two support arms and the holding piece can be tightened and released by attaching and detaching the bolt, the tightening operation can be easily performed.

A rotary shaft having the bases of both support arms fixed thereto is disposed on one side of the web transfer path downstream of the squeeze roller, and the base of the operating arm is fixed to the rotary shaft. Preferably, the piston rod of the hydraulic cylinder is connected.

The operation of the fluid pressure cylinder opens and closes both squeeze rollers. Since the squeeze roller can be removed from the support arm with both squeeze rollers opened, the removal operation can be easily performed.

Downstream from the rotation axis of the web transfer path,
A pair of air knives are arranged so as to be able to open and close with the same path interposed therebetween, and both air knives are fixed to a pair of rotating air supply pipes extending parallel to the rotation axis and parallel to each other. Preferably, a pair of gears meshed with each other are fixed, and one of the gears and the operating arm are connected by a link.

Since both air knives can be opened and closed simultaneously with the opening and closing of both squeeze rollers, a favorable relative positional relationship between the two can be maintained in removing the sterilizing liquid, and a stable sterilizing liquid removing effect can be obtained.

It is preferable that at least one of the support arm and the operation arm is provided with a strain gauge.

When a load is applied to both of the supporting arms or the operating arm due to a rotation failure of the squeeze roller, the strain gauge detects the load. Therefore, the pressing force of the squeeze roller can be monitored.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

In the following description, left and right refer to FIG. 1 as a reference, the left side of FIG. 1 is referred to as a left side, and the opposite side is referred to as a right side.
The front and rear are perpendicular to the paper surface of FIG. 1 and the front side is the front, and the opposite side is the rear.

Referring to FIG. 1, a web W is formed into a cylindrical shape, and a sterile chamber 11 surrounding a packaging work space for filling the content into the cylindrical shape, and a web W to be introduced into the sterile chamber 11 are sterilized. The web sterilizer 12 is shown.

The aseptic chamber 11 has a horizontally-long box-shaped upper chamber 21 and a vertically-long box-shaped lower chamber 22 extending downward from substantially the right half thereof. A web entrance 23 is provided on the bottom wall of the upper chamber 21.

The web entrance 23 in the upper chamber 21
The feed roller 31 is disposed almost directly above the feed roller 31. In the vicinity of the upper end of the feed roller 31, a pressing roller 33 attached to the tip of a vertically swinging left arm 32 is pressed from above. A left small bending roller 34 and a right large bending roller 37 are disposed to the right of the feed roller 31. Feed roller
Below and between the small bending roller 31 and the small bending roller 34, a dancer roller 36 attached to the tip of the vertical swing right arm 35 is arranged. A meandering correction roller 38 is disposed slightly below the bending rollers 34 and 37. Meandering correction roller
Below the 38, a forming roller wheel 39 is arranged.

The web W introduced upward from the web inlet 23 into the upper chamber 21 is first passed between the feed roller 31 and the press roller 33, and then the dancer roller 36,
It is sequentially wound around the small bending roller 34, the large bending roller 37, and the meandering correction roller 38, is guided downward from the meandering correction roller 38, passes through the forming roller wheel 39, and is sent to the lower chamber 22. In the lower chamber 22, the web W is formed into a tube, which is filled with contents. The contents filling tube is discharged from the aseptic chamber 11, and is sealed in a transverse direction for every one container.
It is cut and becomes a pillow-shaped unfinished container. The unfinished container is finally formed into a rectangular parallelepiped, and becomes a completed container.

Referring to FIG. 2, a left rotation shaft 41 to which the base of the left arm 32 is fixed also serves as a support shaft for the guide roller 34. The front end of the left rotation shaft 41 projects forward from the sterile chamber 11, and a left urging arm 42 is fixed to the projection. The distal end of the left urging arm 42 is connected to a piston rod of a small fluid pressure cylinder 43. Right arm
The right rotation shaft 44 to which the base of 35 is fixed is projected forward from the sterile chamber 11 similarly to the left rotation shaft 41, and the right urging arm 45 is fixed to the protrusion. The distal end of the right urging arm 45 is connected to a piston rod of a large fluid pressure cylinder 46.

The web sterilizer 12 has a concentration of 30 to 35%.
And a pair of squeeze rollers 53 and air knives 54 arranged on both sides of a web moving path from the web inlet 23 to the feed roller 31. ing.

The sterilizing liquid tank 51 is formed in a vertical rectangular cylindrical shape having upper and lower openings with a thickness in the left-right direction and having a lower opening as an inspection port 61, and a bottom lid 63 for opening and closing the inspection port 61. Become.

The tank body 62 has an upper end opening formed in the upper chamber.
It is installed so as to be covered by 21 bottom walls. At the upper end of the left side wall of the tank body 62, a left bulging working chamber 71 is provided in a communicating manner. The working chamber 71 is opened to the left, and an opening / closing door 72 is provided in the opening. A web inlet 73 is provided on the bottom wall of the working chamber 71. An upper web guide roller 81 is provided in the working chamber 71, and a lower web guide roller 82 is provided at the bottom of the sterilizing liquid tank 51, respectively.

The web W introduced into the working chamber 71 upward from the entrance is wound around the upper web guide roller 81 and guided downward in the sterilizing liquid tank 51, and is wound around the lower web guide roller 82 and inverted. Then, the liquid is guided upward in the sterilizing liquid tank 51 and then to the web inlet 23 of the sterile chamber 11.

FIGS. 3 to 5 show the details of the squeeze roller 53 and the air knife 54. FIG.

The left and right squeeze rollers 53 are used to squeeze the sterilizing liquid adhered to the web W by being rotated while sandwiching the web W therebetween.
The outer surfaces of both squeeze rollers 53 are covered with an elastic material such as rubber. Among the left and right squeeze rollers 53, the left squeeze roller 53 presses one surface of the web W on the side to be the inner surface of the container.

The roller shaft 201 of the left squeeze roller 53 is sandwiched between the front ends of a pair of front and rear swing support arms 202 and a pair of front and rear pressing pieces 203. A narrow portion 204 is provided at the distal end of the support arm 202, and a pressing piece 20
3 are superimposed. Support arm 202 and holding piece
On the mating surface of 203, semicircular recesses 205 and 206 which are united to form a shaft hole are formed facing each other. At the position of the support arm 202 from the base to the mating surface recess 205,
A through bolt hole 207 is formed perpendicular to the mating surface.
On the other hand, a bottomed screw hole 208 is formed in the mating surface of the pressing piece 203. Recess 205 of support arm 202 and holding piece 203,
The bolt hole 207 and the screw hole 208 are aligned with the united 206. Also, a strip-shaped left germicidal liquid scattering prevention cover
Reference numeral 209 is attached to the support arm 202 so as to cover the left squeeze roller 53 from the left side.

A pair of tightening bolts 211 are screwed into the screw holes 208 through the bolt holes 207 in a state where the roller shaft 201 of the squeeze roller 53 is sandwiched between the two support arms 202 and the pressing pieces 203.

The roller shaft 212 of the right squeeze roller 53 extends between the front and rear side walls of the aseptic chamber 11, and the right squeeze roller 53 is a constant roller. Further, a right semi-circular liquid scattering prevention cover 213 having a substantially semicircular cross section is passed over the front and rear side walls of the sterile chamber 11 so as to cover the right squeeze roller 53 from the right side.

The bases of both support arms 202 are fixed to a horizontal rotation shaft 221 extending in the front-rear direction. The rotation shaft 221 is
Both squeeze rollers 53 and air knives indicated by solid lines in FIG.
It is located at an intermediate level of 54, just to the left of the web path. The front end of the rotating shaft 221 penetrates the front side wall of the sterile chamber 11 and projects forward. Referring to FIG. 5, an operating arm 222 is fixed to a forwardly projecting end of the rotating shaft 221. A piston rod of a fluid pressure cylinder 223 attached to the outer surface of the front wall of the sterile chamber 11 is connected to the tip of the operation arm 222.

A strain gauge (not shown) is attached to the support arm 202. The paper powder of the web adheres to the squeeze roller 53, or a sealing tape (not shown) attached to the edge of the web wraps around the squeeze roller 53. Excessive force is applied and the support arm 202
Is deformed, the strain gauge detects this. The output signal of the strain gauge can be used as the input signal of the alarm. Also, a strain gauge may be attached to the operation arm 222.

When the piston rod of the fluid pressure cylinder 223 is protruded, the support arm 202 is swung counterclockwise in FIG. 5 and the left squeeze roller 53 is pressed against the right squeeze roller 53. When the piston rod of the fluid pressure cylinder 223 is retracted, the left squeeze roller 53 is swung so as to be separated from the right squeeze roller 53, and FIG.
The state shown in FIG. In this state, the squeeze roller 53 is inspected.

When the bolt 211 is loosened and pulled out from the screw hole 208, the squeeze roller 53 is removed from the support arm 203 together with the pressing piece 203.

After the inspection, the roller shaft 201 of the squeeze roller 53 is again sandwiched between the tip of the support arm 202 and the holding piece 203, and both are tightened with the bolt 211, so that the squeeze roller 53 is attached to the tip of the support arm 202. It is attached.

The left and right air knives 54 are squeezed rollers 53
The sterilizing liquid that cannot be removed by the above method is removed by blowing high-temperature and high-pressure air onto the web W, and is composed of hollow strips protruding in the radial direction from horizontal air supply pipes 231 extending parallel to each other.

As shown in FIG. 4, the hollow portion of the air knife 54 is communicated with the inside of the air supply pipe 231 and the opening at the tip thereof is an outlet.

The rear ends of both air supply pipes 231 are rotatably supported on the rear side wall of the sterile chamber 11. The front ends of the two air supply pipes 231 are closed, and a solid shaft 235 projecting forward from the front ends is integrally provided.
The solid shaft portion 235 protrudes forward from the front side wall of the sterile chamber 11. Solid shaft part 235 of both air supply pipes 231
Bosses of a pair of gears 236 meshed with each other are fitted to the protruding portions.

Referring to FIG. 5, a set bolt 237 is screwed into the boss of both gears 236. Left and right gear 236
Of the left gear 236 in the radial center,
Is attached at one end. The other end of the connection link 238 is connected in the middle of the length of the operation arm 222.

When the operating arm 222 is swung during the inspection of the left squeeze roller 53, both gears 236 are rotated in opposite directions by the connecting link 238, and as a result, both air knives 54 move the tips toward and away from each other. Can be opened and closed.

[0050]

According to the present invention, both squeeze rollers can be accurately positioned in the closed position.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a web sterilizing liquid removing apparatus according to the present invention and a peripheral portion thereof.

FIG. 2 is a front view of the portion shown in FIG.

FIG. 3 is a perspective view of the web sterilizing liquid removing device.

FIG. 4 is a vertical sectional view of the web sterilizing liquid removing apparatus.

FIG. 5 is a front view of the part shown in FIG. 4;

[Explanation of symbols]

 51 Sterile liquid tank 53 Squeeze roller 202 Support arm 203 Holding piece 211 Bolt W Web

Claims (7)

[Claims] 1. A sterilizing solution tank, a web transfer means for introducing a web into the sterilizing solution tank, immersing the introduced web in the sterilizing solution in the sterilizing solution tank, and thereafter discharging the web from the sterilizing solution tank. A web squeezing roller disposed so as to be able to open and close with the web transfer path after being discharged from the squeezing roller, one of the squeezing rollers is a fixed roller and the other is a moving roller. A web sterilizing liquid removing device, which is a roller. 2. A web sterilizing liquid removing apparatus according to claim 1, wherein a squeeze roller corresponding to the inner surface of the web, which is the inner surface of the web, is a moving roller. 3. Both ends of a roller shaft of a moving squeeze roller are sandwiched between a pair of vertically swinging support arms and a pair of holding pieces. 3. The web sterilizing solution removing device according to claim 1, wherein the web sterilizing solution removing device is detachably fastened by the device. 4. The apparatus for removing a web sterilizing liquid according to claim 3, wherein the tightening tool comprises a pair of bolts which penetrate through the distal end portions of both support arms and one of the holding pieces and are screwed into the other. 5. A rotating shaft having the bases of both support arms fixed thereto is disposed on one side downstream of the web transfer path squeeze roller, the base of the operating arm is fixed to the rotating shaft, and the tip of the operating arm. 5. The web sterilizing liquid removing apparatus according to claim 3, wherein the piston rod of the fluid pressure cylinder is connected to the portion. 6. A pair of air knives is disposed downstream of the rotation axis of the web transfer path so as to be able to open and close with the same path interposed therebetween, and both air knives are parallel to the rotation axis and parallel to each other. 6. The web according to claim 5, wherein the web is fixed to a pair of rotating air supply pipes extending therethrough, a pair of gears meshed with each other are fixed to the two air supply pipes, and one of the gears and the operating arm are connected by a link. Sterilizer removal device. 7. The web sterilizing solution removing apparatus according to claim 5, wherein a strain gauge is provided on at least one of the both support arms and the operation arm.