JP6316166B2 - Automatic bagging machine - Google Patents

Description

  In the present invention, liquids such as Chinese herbal decoction, liquid seasonings, liquid cosmetics, machine oil, etc., leave air in the bag while forming the bag while continuously feeding the resin film from the roll film. The present invention relates to an automatic bagging machine that packs a predetermined amount of bags.

  Conventionally, various liquid medicines, liquid beverages, liquid oils, etc., while forming a cylindrical shape by heat-welding the thermoplastic resin film that is continuously sent from the roll-shaped film on both sides, Along the way, the automatic filling machine is widely used in the industry as it puts a predetermined amount of the above liquid material, seals all four sides by heat welding, packs the bag, cuts the bag and cuts it out and removes it. Used in the world.

  As a prior art of this type of automatic bagging machine, there is an invention of Patent Document 1. The invention of this Patent Document 1 includes a winding roll that winds up a heat-sealable film, a roll group that draws out the film of the winding roll and sends out the film that is the front and back of the bag, and an overlapping opening. A vertical seal roll that vertically seals the end side, a first and second horizontal seal roll that bottom seals, and a cutter device provided below the roll, and a liquid material is formed inside the cylinder while forming a cylindrical shape with a film This is a technique for manufacturing a liquid sachet package having a structure in which a filling nozzle for injection is inserted. In this invention, it is a continuous automatic bagging machine that forms a bag while continuously feeding a film, fills with a liquid material, and separates each bag.

However, the invention of this cited document 1 is not a technique for filling a bag with a liquid material without leaving air.
In the case of foods, the air in the bag is excluded. If there is air, it will rot and oxidize and deteriorate the quality of the food. Therefore, the present invention is not suitable for the bagging without leaving air.

Furthermore, in order to enable printing on the bag at the same time, the cited document 1 uses a special laminated film. In the invention of this cited document 1, it is difficult to use for filling a bag in which a liquid is filled in a full state so that air is not contained in the bag.
Further, since the amount of liquid material to be packed is also determined by the injection amount from the filling nozzle, it is difficult to pack the liquid material with high accuracy. In particular, the accuracy was difficult to maintain if the bagging speeded up.

  Further, the invention of Cited Document 2 vertically seals a pair of films on the front and back of a bag into a cylindrical shape, and injects a liquid material into the inside of the cylindrical shape, and horizontally seals the injected cylindrical portion at regular intervals. It is a technology that heat seals with a roll and packs the liquid material.

  In the invention of the cited document 2, the bag is filled with the liquid material so that air does not enter, but the weight and volume of the content of the liquid material are basically determined by the interval of the horizontal seal. However, when the pair of left and right sealing plates in horizontal sealing are in pressure contact with each other, the liquid material of the contents is pressurized with the pressure contact pressure, and the pressure is increased, causing the bag film to expand in the left-right direction. As a result, the film stretches and the bag swells in the left-right direction to change the bag filling amount, thereby increasing the error. Further, since the filling accuracy is affected by the amount of liquid material injected into the cylindrical film above the position to be laterally sealed, it is determined that it is difficult to make an error of 1 to 2%.

JP 2005-186507 A JP 2001-97322 A

  The problem to be solved by the present invention is an automatic bag which can reduce the error in the weight or volume of the liquid material to be filled in the conventional automatic bagging machine and can pack the weight and volume of the highly accurate content. It is to provide a filling machine.

The configuration of the present invention that solves this problem is as follows.
1) A film roll obtained by winding a film made of a thermoplastic resin that will be the front and back surfaces of a bag into a roll shape, and a film roll of the same film roll that is pulled out and overlapped on the left and right so that it can be sent vertically. Film feed roller group, and a side seal in the vertical direction that heats and heat welds both the front and rear ends or one end of the film while feeding the overlapping film left and right with the feed roller group A pair of left and right side seal heating rollers forming a part, and the bottom side seal part and the upper side of the bag by heating the tube-shaped front and back films below the side seal heating roller from the outside of the film transversely A pair of left and right bottom seal heating rollers that form a bottom seal portion to be a seal portion, and the bottom seal heating roller is formed below the bottom seal heating roller. A pair of left and right cutter rollers provided on the outside of the film that divides the bottom seal portion into a lower seal portion and an upper seal portion, and a pair of left and right cutter rollers that are suspended from above the side heating roller and below the bottom seal position of the bottom seal heating roller an injection tube of liquid product to be packaged is inserted vertically between the front and back films become cylindrical as tube end comes, from the lower tube end of the injection tube is inserted into the bag a little upper position The liquid level sensor that detects the liquid level of the liquid substance that detects the liquid level with electric resistance or current between the two rod-shaped conductors, and the liquid article that is sent from the outside to the top end of the injection pipe A control valve for controlling the opening and closing of the feed or the feed amount, and a control unit for controlling the start and stop of the control valve, the feed heating stop operation of the side heating roller, the bottom seal heating roller and the cutter roller, and the front Each roller rotates about a horizontal axis, and a pair of left and right rollers rotate in the opposite directions in synchronism with each other at the same speed, and the control unit closes the control valve when the liquid level sensor detects the liquid level of the liquid material. Then, the bottom seal heating roller is operated, and after bottom sealing, the film is fed until the middle of the bottom seal part is at the cutter position of the lower cutter roller, and the cutter roller is operated to remove the bag filled with the lower liquid material. Cut off the middle of the bottom seal part, then send the film above the bottom seal part while side-sealing, and repeat the control of the liquid injection from the injection tube and the cutting of the bottom seal and bottom seal part from the roll film An automatic bagging device that automatically packs liquid products one by one while forming a bag,
A bulge that is located between the bottom seal heating roller and the cutter roller and that extends back and forth at a certain left and right distance to prevent the side-sealed left and right film bag portions from bulging more than a predetermined width. A pair of restraining members provided on the left and right sides, and a bag with a side seal and a bottom seal that forms the bottom side of the bag under the cutter roller. A pair of left and right automatic bagging machines provided with a pair of left and right sides that are spaced apart from each other by a predetermined length, and are provided with a pair of left and right side seal heating rollers that are located outside the vertical film. It is horizontally arranged in the front-rear direction so as to face the front and back of the bag. The roller is a symmetrical, identically-shaped, same-diameter roller that is press-contacted through the film at the front and rear diameter-enlarged portions, and the same spur gear is coaxially mounted on the left and right rollers coaxially with the roller shaft. The automatic bagging machine 3) according to 1) above, wherein the pair of left and right bottoms is provided with a driving means for rotating the spur gears in synchronization with each other and rotating in the opposite direction. The seal heating roller and the cutter roller are arranged horizontally and in parallel in the front-rear direction so as to face the outside of the vertical film, widen the gap between the opposite roller ends of the left and right rollers, and a liquid material in the bag formed of the film. A width that can pass through the filling bag thickness in a state where the predetermined amount is filled in an average amount, and a long long diameter expanding portion is provided in the roller axial direction in which the outer diameter of the circumference of each roller is increased, Long expanded parts fill each other In addition, in the bottom seal heating roller, a heating means is provided in the long diameter enlarged portion, and the two right and left films are heat-sealed at this portion by the heat of the same large diameter enlarged portion, thereby making it possible to perform bottom sealing. In the case of a cutter roller, one long diameter expansion part has a long cutter blade at the front and back, and the other long diameter expansion part has a long blade support at the front and back so that the cutter blade can be fitted to the blade support to cut the film. The same spur gear is pivotally attached to each bottom seal heating roller, and the spur gears of the left and right bottom seal heating rollers are meshed with each other to rotate the rollers in the opposite direction, and the spur gear is also axially attached to the cutter roller. In addition, the spur gears of the left and right cutter rollers mesh with each other and rotate in the opposite direction synchronously. In addition, the spur gears of the bottom seal heating roller and the spur gears of the cutter roller interlock with each other. Through gears , With a drive means you rotate the spur gear, it is in the 1) or 2) an automatic bagging machine according to any one.

  In the present invention, first, a film is formed into a cylindrical shape, a liquid material is injected therein, and the liquid level of the injection amount is detected by a liquid level sensor, so that the same injection amount can be obtained without depending on the injection accuracy of the injection device. Made and improved accuracy. In addition, a bag formed of a film with the bottom seal heating roller and the cutter roller is filled by providing a swelling suppressing member extending back and forth at a constant left and right interval between the bottom seal heating roller and the cutter roller. The swelling restraining member restrains the liquid material from expanding to the left and right, and prevents the bag from greatly expanding to the left and right. As a result, the error in the weight and volume of the liquid filled in the bag can be reduced. In addition to this, by providing a pair of left and right bulge prevention plates below the cutter roller, it prevents the right and left bulges of the bag below the cutter roller from exceeding a certain width, and further the weight and capacity of the liquid to be filled. The error can be reduced. In the present invention, by providing the swelling suppressing member and the swelling preventing plate, the error of the filling amount of the liquid material in one bag can be reduced to about ½ or less by the capacity with respect to the error without this, and the filling accuracy is very good. A liquid automatic bagging machine was created.

FIG. 1 is a perspective view of the embodiment. FIG. 2 is an explanatory view showing the mechanism of the embodiment. FIG. 3 is an enlarged explanatory view showing an installation state of the liquid level sensor of the embodiment. FIG. 4 is an explanatory diagram of a state in which film feeding is started in the embodiment. FIG. 5 is an explanatory diagram illustrating a state where the first bottom seal of the embodiment is performed. FIG. 6 is an explanatory diagram showing a cutter stroke by the first cutter roller of the embodiment. FIG. 7 is an explanatory view showing a state at the time of injecting the liquid material in the first bag according to the embodiment. FIG. 8 is an explanatory diagram illustrating a state when the liquid material injection according to the embodiment is completed. FIG. 9 is an explanatory view showing a bottom seal state of the embodiment. FIG. 10 is an explanatory diagram showing a feeding state immediately after the bottom seal of the embodiment. FIG. 11 is an explanatory view showing a state where a bag filled with a lower liquid material is cut and separated by the cutter roller of the embodiment. FIG. 12 is an explanatory view showing a state in which the liquid material is injected from the injection pipe into the upper bag portion after the bag filled with the lower liquid material is cut by the cutter roller. FIG. 13 is an explanatory view showing how the bag swells when there is no bulge suppressing member during bottom sealing. FIG. 14 is an explanatory diagram illustrating a driving mechanism of each roller according to the embodiment.

In the present invention, when the front and back surfaces of the bag are used as separate films, each film is suspended so as to be overlapped on the left and right by the film feed roller group, and the front and rear ends are side-sealed into a cylindrical shape. Requires two (a pair) film rolls. In addition, the front and back surfaces of the bag are folded back by a film feed roller group along the longitudinal center line of one sheet of film, folded back so that the film is overlaid, and only the opened end is side-sealed to form a cylindrical shape. There is a case to go. In this case, only one film roll is required.
The present invention includes both cases.

  In the present invention, the spacing between the swelling-suppressing members is the distance between the roll ends of the left and right roll bodies at the upper and lower bottom seal heating rollers, or other peripheral roller bodies that are not the diameter-expanded portion of the cutter roller. The distance between the left and right roll ends is preferably substantially the same width as the force restraint by the roller body.

  The seal of the side seal heating roller of the present invention forms the side seal part by heating the front and rear ends or one end of the front and rear of the two-layered film of thermoplastic resin. The front and rear expanded parts with the roll diameter expanded are provided so that the expanded parts of the left and right rolls are pressed against each other via two films. The front and rear expanded parts are heated with an electric heater or the like to fuse the film. It is preferable to be able to do this.

The structure of the bottom seal heating roller and cutter roller of the present invention keeps each roller at a wide interval (interval slightly larger than the thickness of a bag uniformly filled with a predetermined amount of articles), and greatly enlarges the diameter of the circumference of the roller. A long diameter-expanded portion having a diameter is provided, and a dimension and a gear mounting phase are set such that the long-diameter portions of the left and right rollers are in pressure contact with each other when facing each other.
Also, the long diameter enlarged portions of the pair of left and right bottom seal heating rollers and the cutter roller are opposed to each other at a predetermined rotational phase so that they are pressed against or close to each other with a film interposed therebetween. It is preferable to synchronize the gears so that they mesh with each other and come into pressure contact with each other with a predetermined phase.

  The timing at which cutting by the cutter roller at the intermediate position of the bottom seal portion formed by the bottom seal heating roller can be performed by synchronizing the rotation of the bottom seal heating roller and the rotation of the cutter roller with the above spur gear. The rotation angle (seal feed amount) of the seal heating roller is accurately adjusted by adjusting the distance between the sealing position of the bottom seal heating roller and the cutter position of the cutter roller.

  The left and right pair of side seal heating roller / bottom seal heating roller and cutter roller have the same structure on the left and right and are arranged symmetrically via the film. The rotation is reversed on the left and right sides, and the rotation can be synchronized by meshing the spur gear with the roller attached thereto at a predetermined phase.

  The side seal heating roller, the bottom seal heating roller, and the cutter roller may be rotated by transmitting the power of a motor or the like to a rotating shaft of the roller or a gear / belt wheel that is attached to the roller.

  The method of feeding the liquid material into the injection pipe 6 includes a method of forcibly feeding the liquid material from the storage tank or the storage container with a pump, or a method of installing the storage container / storage tank at a high place and sending it by gravity (water head difference). is there.

  The pair of film rollers are arranged in a different position in the vertical direction, in addition to facing the left and right as in the embodiment, and at two different positions in the front-rear direction or the same left, right, front, rear direction It is also possible to arrange them together.

Hereinafter, the present invention will be described with reference to the drawings of FIGS.
The liquid material to be packed in this embodiment is a liquid decoction decocted with herbal medicine, which is packed using a pair of film rolls of resin film, about 200 cc or 100 cc in one bag. Automatic bagging machine to fill. Further, the embodiment is an example in which a restriction rod 8 is provided as a swelling suppression member and a restriction plate 9 is provided as a swelling prevention plate.

(Explanation of structure and symbols in the figure)
In the figure, G is an automatic bagging machine of the embodiment of the present invention, F is a film, liquid decoction which M is a liquid material bagging, P is the bag, P ₁ is a side seal of the bag, P ₂ bags bottom seal portion, P _2U the upper seal portion of the bag to be formed is divided into upper and lower part of the bottom sealing portion P _2, P _2B is a lower seal portion formed are separated likewise. 1 is a resin obtained by superposing thermoplastic polyethylene terephthalate (exterior) and polyethylene (interior), and a pair of left and right film rolls wound with a film F having a film thickness of 0.126 mm. Yes, 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ are feed rollers of the configuration. 3 ₁ , 3 ₂ are a pair of left and right side seal heating rollers, 3 ₁₁ , 3 ₂₁ are roller bodies, 3 ₁₂ , 3 ₂₂ are electric heaters (not shown) in the inside of the roller body whose diameter is increased before and after. front and rear enlarged diameter portion with a built, 3 _13, 3 ₂₃ spur gear of the left and right spur gear pivotally attached to the roller body 3 _11, 3 ₂₁ in synchronism in opposite directions to each other meshes with the same diameter roller The main bodies 3 ₁₁ and 3 ₂₁ are rotated. 3 ₁₄ is a drive gear for transmitting the motor 12 ₁ of the power for rotating one of the spur gear _313. 4 ₁ , 4 ₂ are a pair of left and right bottom seal heating rollers, 4 ₁₁ , 4 ₂₁ are roller main bodies, 4 ₁₂ , 4 ₂₂ are long diameter-expanded portions which are long in the roller direction and are greatly expanded in the circumference of the roller main body. Thus, an electric heater (not shown) is built in. 4 _{13, 4 23} is a spur gear which is pivotally attached to the roller body _{4 11, 4 21,} the left and right of the spur gear _{4 13, 4 23} mesh with each other. 4 ₂₃ is rotated by a motor 12 ₂ by the driving spur gear in mesh with one spur gear _{4 14.} Moreover, the driving spur wheel _{4 14} are cutter roller ₅ 1, _{5 2} spur gears _{5 25} both meshing below. 5 _{1, 5 2} pair of cutters _rollers, 5 _{11, 5 21} and their roller _body, 5 _{12, 5 22} are longer in length enlarged diameter portion in the axial direction of the roller with larger diameter of the round part of the roller body, 5 ₁₃ one cutter provided on the peripheral surface of the long diameter portion _{5 12, 5 24} blade receiving provided on the peripheral surface of the other long diameter portion _{5 22,} 5 _{15, 5 25} the roller body _{5 11,} in spur gear pivotally attached to the 5 _21, it is rotated by the driving spur gear _{4 14.} 6 inlet tube ₆₁ the tube end below the same inlet tube 7 is controlled valves for feeding the decoction M into the injection tube 6, 8 of the bottom seal heating roller ₄ 1, _{4 2} and the cutter roller ₅ 1, _{5 2} It is the control stick | rod which is a swelling suppression member provided in the upper and lower middle. 9 is a cutter roller 5 _1, 5 ₂ of the bag thickness of the filling bag is blistering prevention plate provided below a parallel downward and horizontally long two parallel plates stifle a predetermined width regulating plate. 10 is a liquid level sensor for detecting the liquid level by electric resistance or electric current between two rod-shaped conductors, and 11 is a sensor signal of the liquid level sensor 10 for operating / stopping the roller, control valve, motor, electric heater, etc. The control units 12 ₁ and 12 _{2 that} are controlled according to the motors are motors.

In this embodiment, as shown in FIG. 1, the film F is fed from a pair of left and right film rolls 1 and is a symmetrical film comprising feed rollers 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ arranged symmetrically. The left and right films F are fed to the center by the feed roller group 2 and fed downward so as to overlap in the center. The film F is pulled by the side seal heating rollers 3 ₁ and 3 ₂ below.

The diameter of the central part of the roller body 3 ₁₁ , 3 ₂₁ of the side seal heating rollers 3 ₁ , 3 ₂ is short, and the distance between the roller ends of the central part of the left and right roller bodies 3 ₁₁ , 3 ₂₁ is outside the injection pipe 6. It is a little longer than the diameter, and the rod-shaped conductor level sensor 10 can be arranged in front and back of the injection tube 6 so as to be separated from each other by a certain distance.

The side seal heating rollers 3 ₁ , 3 ₂ have front and rear enlarged diameter portions 3 ₁₂ , 3 ₂₂ at the front and rear positions, and the pair of left and right side seal heating rollers 3 ₁ , 3 ₂ have front and rear enlarged diameter portions 3 _12. , so that the pressure contact across F2 like film _{3 22.} The front and rear enlarged diameter portions 3 ₁₂ and 3 ₂₂ are heated by an electric heater (not shown).

Accordingly, the two films F that are the front and back of the vertically hanging bag are pressed by the front and rear enlarged diameter portions 3 ₁₂ , 3 ₂₂ , and the films F are welded to each other by heat to be joined together. The film F is pulled downward by the rotation of the side seal heating rollers 3 ₁ and 3 ₂ while forming the part P _1, and the film F is fed out from the left and right film rolls 1.

The side seal heating rollers 3 ₁ and 3 ₂ are driven by rotating the drive gear 3 ₁₄ by the rotation of the motor 12 ₁ . Rotation of the drive gear 3 ₁₄ to rotate one of the spur gears 3 ₁₂ in mesh therewith, the rotation of the Dotaira gear 3 ₁₂ by rotating the spur gear 3 ₂₂ in mesh therewith in the opposite direction, the roller body 3 ₁₁ , 3 ₂₁ are rotated at the same speed and in the opposite direction to the direction in which the two films F are sent downward. The mechanism of these drive systems is shown in FIG.

(Operation of the embodiment)
First, FIG. 4 shows an initial state in which the film F is pulled from the film roll 1 and is sent downward by the side seal heating rollers 3 ₁ and 3 ₂ . A film F having a predetermined length is sent downward while side-sealing. While the film F is side seal, bottom seal heating roller 4 _1, 4 ₂ and is sent to the vertical to the lower cutter roller 5 _1, 5 _2, and sent to the control valve 7 not inject decoction M in the closed state. At this time, the bottom seal heating rollers 4 ₁ , 4 ₂ and the cutter rollers 5 ₁ , 5 ₂ are not rotated, and the roller main bodies 4 ₁₁ , 4 ₂₁ , 5 ₁₁ , 5 ₂₁ are sent downward without resistance. It is done.

Next, as shown in FIGS. 5 and 14, a sufficiently long film F is side-sealed and sent downward, and then the bottom seal heating rollers 4 ₁ and 4 ₂ are rotated. The rotation of the rollers, the driving spur gear _{4 14} rotates, thereby rotating the driving spur gear _{4 14} spur gear ₄ 13 meshed with _{the, 4 23} and the spur gear _{5 15, 5 25} in the opposite direction at the same speed Thus, the roller bodies 4 ₁₁ and 4 ₂₁ and the roller bodies 5 ₁₁ and 5 ₂₁ of each roller are rotated at the same speed and in the opposite directions.

In FIG. 5, when the bottom seal heating rollers 4 ₁ and 4 ₂ are rotated by about 90 °, the long diameter enlarged portions 4 ₁₂ and 4 ₂₂ at one peripheral portion of the roller bodies 4 ₁₁ and 4 ₂₁ are side-sealed 2 The film F is pressed in the lateral direction (front-rear direction). Also, the long diameter portion 4 _12, 4 ₂₂ have been heated, the film F is a bottom sealing portion P ₂ is formed by thermally熔着along the press line. At the same time, the cutter rollers 5 ₁ and 5 ₂ also rotate in synchronization, but their long diameter enlarged portions 5 ₁₂ and 5 ₂₂ are in phase at 10:10 and are not close to each other.

Further, by rotating the driving spur gear 4 _14, the long diameter portion 4 _12, 4 ₂₂ is rotated away downwards, the film F is also sent downward. At the same time, the cutter rollers 5 ₁ and 5 ₂ also rotate about 135 ° from the state shown in FIG. 5 to the state shown in FIG. When the roller from FIG. 5 as 135 ° is rotated, the cutter roller _{5 first} cutter blade _{5 13} long diameter portion _{5 12,} the blade receiving _{5 24} engages the other of the cutter roller _{5 second} long diameter portion _{5 22} and, the cutter 5 ₁₃ from the middle of the upper and lower width of the bottom seal portion P ₂ of the two films F therebetween cuts the two films F (see FIG. 3). The bottom seal portion P ₂ of the cut bottom seal portion P ₂ of the portion of the bag bottom side seal portion P _2B becomes higher, and the upper side of the bag P that has cut portions of the bottom seal portion P ₂ of the lower is disconnected It becomes the seal part _P2U .
As a result, an empty bag (cylinder) separates from the film F and falls downward. FIG. 6 shows this state.

  In FIG. 6, the film part that is cut and separated is an empty film part that is not filled with the decoction M, which is discarded. This state is only the first time, and the filled bag will be cut and separated from the next time.

After the lower side seal portion P _2B (bottom seal portion P ₂ ) of the bag P for the first time in FIG. 6 is formed, the bag P portion having the upper side seal portion P ₁ and the lower side seal portion P _2B in FIG. injecting decoction M from the tube end ₆₁ under the control valve 7 opening operation to injection tube 6 as indicated by 7. The injected decoction M is filled into the bag P. As the bag P is filled with the decoction M, the thickness of the bag P increases.

The feeding of the side seal heating rollers 3 ₁ and 3 ₂ and the formation of the side seal portion P ₁ in FIG. 7 are the same as in the description of FIG. Further, FIG. 7 also the driving spur wheel _{4 14} still without rotating, in bottom seal heating roller ₄ 1 below, _{4 2} and the cutter roller ₅ 1, _{5 2} does not rotate, the long diameter portion ₄ 12, 4 ₂₂ , 5 ₁₂ , and 5 ₂₂ are not in pressure contact with each other and are in an upward phase and a downward phase. Therefore, the distance between the rollers between the heating rollers 3 ₁ , 3 ₂ and the cutter rollers 5 ₁ , 5 ₂ is wide, and the passage of the bag P that has been filled and increased in thickness can be prevented.

When the decoction M is gradually filled into the bag P, while the bottom seal portion P ₂ position is lowered, the bag P is increased its thickness, the cutter roller 5 _1, 5 ₂ of the lower regulating plate 9 (blister It is restrained so as not to exceed a predetermined thickness (see FIG. 8).
When the decoction M in the bag P enters a little more than a predetermined amount, the two liquid level sensors 10 to which a predetermined voltage is applied come into contact with the decoction M and energize to output a detection signal to the control unit 11 ( (See FIGS. 8 and 14).

When the detection signal of the liquid level arrival from the liquid level sensor 10 is output to the control unit 11, the control unit 11 closes the control valve 7 and stops the injection of the decoction M.
The liquid level at this time is set to a position slightly higher than the roller shaft level of the bottom seal heating rollers 4 ₁ and 4 ₂ (see FIG. 8).

Detection signal from the liquid level sensor 10 is output, after the infusion of decoction M from the injection tube 6 is stopped, the control unit 11 is similar to FIG. 5, to rotate the driving spur gear 4 _14, bottom seal heating roller The long expanded portions 4 ₁₂ , 4 _{22 of} 4 ₁ , 4 ₂ are rotated so as to go from top to bottom in the press-contact direction (see FIG. 9).
In the rotation of the long diameter portion 4 _12, 4 _22, decoction M in the bag P before and after a position facing the bottom seal heating roller 4 _1, 4 ₂ moves been thrust through the lower and upper pressure point.

As described above, by the long diameter portion 4 _12, 4 ₂₂ rotates, is pushed decoction M to keep out air. Forming a bottom seal portion _{P 2} is thermally熔着long diameter portion _{4 12, 4 22} right and left at the pressure points. The amount of decoction M that has moved to the bag above the same bottom seal portion P ₂ is a filling of the next bag (see FIG. 9).

The quantity to be filled with the bottom seal portion P ₂ in the bag P lower that the upper side seal portion, a predetermined amount of the contents in the bag P. After being bottom-sealed, by subtracting the tare weight to detect the weight of the bag P separated by cutting by a cutter roller 5 _1, 5 ₂ of the lower can be determined accurately loading.
On the other hand, when the filling amount in the bag P is set to a predetermined amount, the liquid material actually packed in the bag such as the position of the liquid level sensor 10, the film feed speed, the time of rotation of the bottom seal heating rollers 4 ₁ , 4 ₂ , etc. It can be adjusted by referring to the weight value of the filling amount. By adjusting these, it becomes possible to pack a predetermined amount accurately and with good reproducibility.

In this embodiment, the filling with the rotation of the bottom seal heating roller 4 _1, 4 ₂ is pushed downward, the bottom seal heating roller 4 _1, 4 ₂ and the cutter roller 5 _{1 below,} 5 ₂ therebelow The bag portion between the two tends to swell greatly in the left-right direction due to the pressing pressure, but since there is a restriction rod 8 (swelling suppressing member) between them, the swelling is suppressed. Also, it is regulated so as not blistering constant width over the left and right outward in a bag P of the cutter roller 5 _1, 5 ₂ of the lower portion is also restricting plate 9 (swelling prevention plate). As a result, the lateral swelling of the bag is strongly suppressed, the liquid level by the liquid level sensor 10 does not fluctuate up and down due to the lateral swelling, and the liquid level sensor 10 can accurately fill and inject a predetermined amount. (See FIGS. 9, 10, and 11).

Here, FIG. 13 shows a swollen state of the bag P when the restriction rod 8 (swollen restraining member) is removed from this embodiment. Between the bottom seal heating rollers 4 ₁ , 4 ₂ and the cutter rollers 5 ₁ , 5 ₂ , the bag P is greatly expanded in the left-right outer direction. As a result, the filling amount of the bag P becomes larger than the set amount, resulting in a filling error. On the other hand, when there is a pair of right and left regulating rods 8, there is almost no swelling as shown in FIG.

Then, the formation of the bottom seal portion P _2, from which the cutter roller 5 _1, 5 ₂ film feed the cutter by the length enlarged diameter portion 4 ₁₂ by the rotation speed of the present embodiment drives a spur gear 4 _14, 4 ₂₂ with the rotation of the long diameter portion _{5 12, 5 22} have been synchronized, the bottom seal portion _{P 2} is a cutter blade _{5 13} of the lower cutter roller ₅ 1, _{5 2} of the long diameter portion _{5 12, 5 22} It is adjusted to move successfully to the cutting position of the blade receiving 5 _24. Moreover, both the feed rate by the side seal heating roller 3 _1, 3 ₂ to the side seal, by adjusting the rotation of the drive gear 3 ₁₄ and the drive spur gear 4 _14, and a control unit 11 is a film feed, bottom seal And adjusting the timing of the cutter.

Figure 11 is a state of being cut by the cutter roller 5 _1, 5 _2, bags P completing filling drops downward. Thereafter, the processes of FIG. 7 (FIG. 12) to FIG. 11 are repeated.

Thus, side seal portions P ₁ from the left and right pair of film rolls _1, that is cut by injecting decoction M with bottom seal portion P ₂ will separate the bagged bags P, and automatic bagging It will continue with a precise filling amount.

(Error comparison test)
Next, in the case where the restriction rod 8 and the restriction plate 9 are provided at the filling amount of the set capacity 200 cc according to the present embodiment, the comparison of the filling amount error in the case where only one of them is present, both are present or not provided at all. Tested. The results are shown in Table 1 below. In addition, when the filling amount is 100 cc, the filling amount error in the case where one of the restriction rod 8 and the restriction plate 9 is not provided is compared. The comparison is also shown in Table 1. This is a test of which one of the regulation bar 8 and the regulation plate 9 is effective.

  As can be seen from Table 1, the standard deviation of 200 cc filling was “2.48” in the case of the conventional structure in which there is no pair of right and left restriction rods 8 and restriction plates 9. On the other hand, when the restriction plate 9 is provided, the standard deviation is “1.15”, and in the case of the embodiment in which both the restriction rod 8 and the restriction plate 9 are provided, the standard deviation is “0.91”. When both the rod 8 and the regulating plate 9 are provided, the filling amount error is about 37% of the conventional deviation, which is greatly reduced. Even in the case of the restriction plate 9 alone, it is about 46% of the conventional one, and the standard deviation is improved to less than half. If both are present, it can be seen that the standard deviation is further reduced and the error is greatly improved.

  Further, it can be seen from the comparison of the effects of the restriction rod 8 and the restriction plate 9 at 100 cc that the restriction rod 8 contributes to reducing the error.

  Thus, in the present invention, the swelling restraining member (regulation bar 8) and the swelling prevention plate (regulation plate 9) can reduce the error in the volume of the filling. In particular, if both members are present, the error can be further reduced.

  The present invention is not limited to liquid medicines such as decoction, but can be used as an automatic bagging machine that can reduce volumetric errors in filling liquid beverages, seasonings, cosmetics, oils, and the like.

F film G Automatic bagging machine of the embodiment M Decoction (article)
P bag P ₁ side seal part of bag ₁ P ₂ bottom seal part of bag P _{2 U} upper side seal part P _{2 B} lower side seal part 1 film roll 2 film feed roller group 2 ₁ , 2 ₂ , 2 ₃ , 2 ₄ feed roller 3 ₁ , 3 ₂ Side seal heating roller 3 ₁₁ , 3 ₂₁ Roller body 3 ₁₂ , 3 ₂₂ Front and rear diameter enlarged parts 3 ₁₃ , 3 ₂₃ Spur gear 3 ₁₄ Drive gear 4 ₁ , 4 ₂ Bottom seal heating roller 4 ₁₁ , 4 ₂₁ Roller body 4 _{12, 4 22} length the enlarged diameter portion 4 _{13, 4 23} spur gear 4 ₁₄ drives spur gear 5 _{1, 5 2} cutter roller 5 _{11, 5 21} roller body 5 _{12, 5 22} length enlarged diameter portion 5 ₁₃ cutter blade 5 ₂₄ blades receiving 5 _{15, 5 25} spur gear 6 injection pipe 6 ₁ tube end 7 control valve 8 regulating rod (swelling suppressing member)
9 Restriction plate (swelling prevention plate)
10 Liquid Level Sensor 11 Control Unit 12 ₁ , 12 ₂ Motor

Claims (3)

A film roll obtained by winding a film made of a thermoplastic resin to be the front and back surfaces of the bag into a roll shape, and the film of the same film roll is drawn out so that it can be fed in the vertical direction by overlapping on the left and right so as to be the front and back surfaces of the bag A film feed roller group and a longitudinal side seal portion that heats and heat welds both front and rear ends or one end portion of the film while feeding a film overlapped on the left and right by the same feed roller group to make the film cylindrical. A pair of left and right side seal heating rollers to be formed, and a lower side seal portion and an upper side seal portion of the bag that are heated from the outside of the film transversely from above and below the side seal heating roller in a cylindrical shape. A pair of left and right bottom seal heating rollers forming a bottom seal portion, and a bottom formed by the bottom seal heating roller below the bottom seal heating roller A pair of left and right cutter rollers provided on the outer side of the film that divides the seal portion into a lower seal portion and an upper seal portion, and a lower pipe that is suspended from above the side heating roller and above the bottom seal position of the bottom seal heating roller an injection tube of liquid product to be packaged is inserted vertically between the front and back films the end became coming as tubular, is inserted into the bag a little upper position from the lower tube end of the injection tube A liquid level sensor that detects the liquid level of the liquid substance that detects the liquid level by electric resistance or current between the two rod-shaped conductors, and a liquid article sent from the outside to the upper end of the injection pipe A control valve that controls the opening / closing or feed amount of the control valve, and a control unit that controls the start / stop of the control valve, the side heating roller, the bottom seal heating roller, and the feed roller stop operation of the cutter roller, The roller rotates around the horizontal axis and the pair of left and right rollers rotate in the opposite direction at the same speed, and the controller closes the control valve when the liquid level sensor detects the liquid level. Then, the bottom seal heating roller is operated, and after bottom sealing, the film is fed until the middle of the bottom seal part is at the cutter position of the lower cutter roller, and the cutter roller is operated to remove the bag filled with the lower liquid material. Cut off the middle of the bottom seal part, then send the film above the bottom seal part while side-sealing, and repeat the control of the liquid injection from the injection tube and the cutting of the bottom seal and bottom seal part from the roll film An automatic bagging device that automatically packs liquid products one by one while forming a bag,
A bulge that is located between the bottom seal heating roller and the cutter roller and that extends back and forth at a certain left and right distance to prevent the side-sealed left and right film bag portions from bulging more than a predetermined width. A pair of restraining members provided on the left and right sides, and a bag with a side seal and a bottom seal that forms the bottom side of the bag under the cutter roller. An automatic bagging machine characterized in that a pair of left and right bulging prevention plates that are longer in the front and rear than the width and vertically hung are provided at a predetermined interval . The pair of left and right side seal heating rollers are disposed horizontally in the front-rear direction so as to face the outside of the vertical film, and the front and rear portions of the rollers on the side where the overlapping films on the front and back of the bag are not connected and opened The left and right rollers are symmetric and have the same diameter and the same diameter and the same diameter as the roller shaft. 2. An automatic system as set forth in claim 1, further comprising a driving means for rotating the spur gear while the spur gear is engaged with each other so that the spur gear meshes with each other so that the spur gear can be rotated in the opposite direction synchronously. Bagging machine. The pair of left and right bottom seal heating rollers and the cutter roller are arranged horizontally and in parallel in the front-rear direction so as to face the outside of the vertical film, and are formed of a film with a wide gap between the opposite roller ends of the left and right rollers. The width of the bag is such that it can pass through the thickness of the bag filled with a predetermined amount of liquid material on the average, and a long widened portion is provided in the roller axial direction in which the outer diameter of the circumference of each roller is increased. The long-diameter portions of each of the rollers are in pressure contact with each other via a film, and the bottom seal heating roller is provided with heating means in the long-diameter portion so that the left and right films are heated by the heat of the long-diameter portion. This part is heat-sealed to enable bottom sealing, and in the case of a cutter roller, a long cutter blade is provided at the front and back at one long diameter part, and a long blade holder at the front and back at the other long diameter part. Fits the blade holder and cuts the film In addition, the same spur gear is pivotally attached to each bottom seal heating roller, and the spur gears of the left and right bottom seal heating rollers are meshed with each other to rotate the rollers in the opposite direction. The spur gears of the left and right cutter rollers are meshed with each other and rotate in opposite directions in synchronization with each other. In addition, the spur gear of the bottom seal heating roller and the spur gear of the cutter roller are connected to each other. with intervening spur gear interlocked, with a drive means you rotate the spur gear, according to claim 1 or 2 automatic bagging machine according to any one.

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