JP5075607B2 - Press mechanism for heat seal roll - Google Patents

Description

  The present invention relates to a roll pressing mechanism of a sealing device that heat seals a packaging film, and more particularly to a pressing mechanism in a multi-row long-axis seal roll that simultaneously forms a plurality of packaging bags.

  As described in Patent Document 1 below, a conventional roll type automatic filling and packaging machine draws out a roll-like packaging film upward by a feeding mechanism, and turns it vertically downward by a guide roll at the uppermost position. The folding film is folded in half in the width direction, and then the folded packaging film is guided to a pair of vertical seal rolls for vertical sealing. The packaging film folded in half by the vertical seal is joined to both ends to form a cylindrical shape. After that, the cylindrical packaging film is guided to a pair of first horizontal sealing rolls to be laterally sealed to form a bag. Thus, after the contents of the packaging bag are charged by the filling mechanism, a horizontal seal is again applied to the charging port of the packaging bag by the first horizontal sealing roll, and a sealed state is obtained.

  Next, for the part laterally sealed by the first lateral seal roll, after performing a lateral seal again using a pair of second lateral seal rolls to increase the seal strength, this continuous packaging bag is It is guided to the first and second cutter devices, and is cut or perforated with respect to the vicinity of the center of the horizontal seal to form an individual packaging bag.

  The pressing mechanism of the vertical and horizontal seal rolls in such a conventional roll type automatic filling and packaging machine is in front of the front view toward the bearing portion (bearing case) that supports the fixed seal roll on the back side of the front view. The bearing portion (bearing case) that supports the movable seal roll on the side of the rotating shaft is pressed by a piston (air cylinder) or a manual screw mechanism with a handle. As a result, heat sealing is performed on the folded packaging film sandwiched between the fixed seal roll on the back side when viewed from the front and the movable seal roll on the front side when viewed from the front, and a fusion bonded state is obtained.

On the other hand, as described in Patent Document 2 below, the four-way seal is configured to simultaneously perform vertical sealing and horizontal sealing using a set of sealing rolls similar to the vertical and horizontal sealing rolls of a roll type automatic filling and packaging machine. Seal roll type automatic filling and packaging machines exist. This four-sided seal roll type automatic filling and packaging machine puts two sheets of packaging film on the front and back of a set of seal rolls with vertical and horizontal sealing blades processed, and at the same time puts the raw material (contents) continuously A four-side sealed packaging bag is made, and thereafter, a four-side sealed packaging bag is made by a cutter device.
Japanese Unexamined Patent Publication No. 4-114484 Japanese Utility Model Publication No. 6-44706

  The above four-side seal roll type automatic filling and packaging machine can be configured to be able to manufacture multiple rows of four-side seal packaging bags at the same time. There was a need for a type automatic filling and packaging machine.

  In such a multi-row four-sided seal roll type automatic filling and packaging machine, the vertical and horizontal sealing blades for multiple rows are machined with respect to the four-side seal roll, so the dimension in the roll axial direction becomes longer and the piston (air Using a cylinder, etc., just press the bearing part (bearing case) of the movable seal roll on the front side of the front view toward the fixed seal roll on the back side of the front view. It becomes difficult to perform a normal heat seal on the film.

  That is, the shape of the heat seal roll is usually a multi-row in which the diameter of the roll part to which the heat seal blade is applied is thick, the diameter of the shaft support part holding the whole seal roll is thin, and the axial dimension is long. When the bearing part (bearing case) is pressed against the seal roll, distortion in the roll axis direction occurs in the shaft support part with a small diameter, and the axial dimension of the roll part with a large diameter is long. Distortion in the roll axis direction will occur.

  As a result, the pressing force of the bearing portion (bearing case) alone is insufficient for the mutual pressing force of the center portion of the seal roll, and the center portion of the sandwiched packaging film is poorly sealed.

  The present invention has been made to solve such problems. In a conventional multi-row roll type automatic filling and packaging machine, the roll pressing force required for the heat sealing operation is secured while the pressing force is applied. It aims at providing the roll press mechanism which suppressed generation | occurrence | production of the distortion of the roll axial direction which accompanies.

  In order to achieve the above object, a sealing device for a multi-row roll type automatic filling and packaging machine according to claim 1 of the present invention is provided with a pair of long-axis seal rolls that are pressed against each other while being rotated in reverse directions. This is a sealing device for a multi-row roll type automatic filling and packaging machine that manufactures multiple packaged products by filling the packaging bag with raw materials (contents) while fusing and bonding the film into a packaging bag shape. In addition, the long shaft seal roll pressing mechanism in the sealing device is configured by a cam follower mechanism that directly presses the long shaft seal roll body.

  In addition, the long-axis seal roll pressing mechanism according to claim 2 of the present invention includes a cam follower mechanism that directly presses the front-side and rear-side long-axis seal roll bodies when viewed from the front. Is provided with two cam follower mechanisms that press the vicinity of both ends of the seal roll body from the front surface toward the rear surface, and the long-axis seal roll on the rear surface side presses the vicinity of the center of the seal roll body from the rear surface toward the front surface. One cam follower mechanism is provided.

  Further, the front cam follower mechanism according to claim 3 of the present invention is set so as to apply a pressing force required for the sealing operation, and the rear cam follower mechanism is configured to reduce the pressing force by the front cam follower mechanism. It is characterized by being set so as to correct the distortion in the roll axis direction accompanying the addition.

  According to the long shaft seal roll pressing mechanism according to claims 1 to 3 of the present invention, in the multi-row roll type automatic filling and packaging machine, while maintaining the roll pressing force necessary for the heat sealing operation, A roll pressing mechanism that suppresses the occurrence of distortion in the roll axis direction accompanying the addition can be provided.

  As described above, according to the present invention, the roll pressing force at the center portion of the roll is suppressed by suppressing the occurrence of distortion in the roll axis direction due to the addition of the pressing force while ensuring the roll pressing force necessary for the heat sealing operation. Therefore, it is possible to provide an excellent effect of providing a seal roll pressing mechanism capable of preventing the occurrence of poor sealing at the center portion of the sandwiched packaging film.

  First, the overall configuration of a four-side seal roll type automatic packaging machine according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing a partial cross section of a four-side seal roll type automatic packaging machine according to the present invention, and FIG. 2 is a right side view showing a partial cross section of a four-side seal roll type automatic packaging machine according to the present invention. It is.

  As shown in FIGS. 1 and 2, two reels are provided on the front and rear surfaces of a four-side seal roll type automatic packaging machine 1 (hereinafter referred to as automatic packaging machine 1). The front-side original fabric roll FH1 and the rear-side original fabric roll FH2 are held so as to be removable. The packaging film is made of a transparent or translucent material, for example, a base film such as PET, or a sealant film such as polyethylene having a melting point lower than that of the base film. The packaging film may have a three-layer structure of a base film, an intermediate film, and a sealant film.

  The wide packaging film F1 and the packaging film F2 drawn out from the front-side original fabric roll FH1 and the rear-side original fabric roll FH2 are guided to a plurality of guide rolls and fed into a sealing device 7 that forms a four-sided sealing bag.

  On the other hand, a hopper 2 containing raw materials (contents) such as powder is attached to the upper portion of the automatic packaging machine 1, and a slide weighing machine that measures the filling amount of the raw materials (contents) immediately below the hopper 2. 3, and the raw material (contents) measured by the cutting operation by the slide weighing board 3 is formed by the fusion joining operation of the seal device 7 via the collecting chute 4, the opening / closing shutter 5, and the upper / lower chute 6. It falls into the inside of the four-way seal bag.

  Then, the four-side sealed bags filled with the dropped raw material (contents) have a plurality of rows of four-side sealed packaging bags that are sealed by the fusion bonding operation of the sealing device 7 and are continuously arranged. That is, the sealing device 7 is formed by fusing and joining a plurality of rows of four-side sealed packaging bags in which raw materials (contents) are filled into two continuous packaging films F1 and F2.

  Next, the wide packaging film formed into a plurality of rows of four-side sealed packaging bags by the sealing device 7 is guided to the slitter device 8 and cut in the vertical direction to form a continuous four-side sealed packaging bag for each row. . After that, the wrapping film that has been cut into continuous four-sided sealing wrapping bags is guided to the cutter device 9 and cut laterally into individual wrapping bags that are taken out from the slide 10 to the outside. . Reference numeral 11 denotes an operation box for operating the automatic packaging machine 1.

  FIG. 3 is an enlarged front view of a part of the sealing device 7 according to the present invention. As shown in FIG. 3, reference numeral 20 denotes one of the four-sided seal rolls that are arranged in parallel with each other and are driven to rotate in the opposite direction, and is not shown on the back side of the four-sided seal roll 20. The other four-side seal rolls 21 are also arranged so as to be pressed against and parallel to each other, and are driven to rotate in the opposite direction. The main body of the four-sided seal roll 20 is provided with vertical and horizontal heat sealing blades, and the vertical and horizontal sealing is performed on the two packaging films F1 and F2 sandwiched by the vertical and horizontal heat sealing blades. Formed into a four-side sealed packaging bag.

  On the other hand, in the vicinity of the left and right ends of the seal roll body of the four-way seal roll 20, two cam follower mechanisms that press from the front face toward the rear face are provided. In FIG. 3, a manual screw portion of the cam follower mechanism is configured. A right handle 30 and a left handle 31 are shown.

  A right bearing portion (bearing case) 24 is fitted into the right shaft support portion 22 that holds the entire seal roll of the four-way seal roll 20, and a left bearing portion ( Bearing case) 26 is fitted.

  In addition, the right axial support portion 22 of the four-way seal roll 20 is used to draw out the lead wires of the heating element (cartridge heater, etc.) and the temperature detection element (thermocouple, etc.) embedded in the four-way seal roll 20 to the outside. A rotary connector 60 and its terminal portion 61 are attached.

  FIG. 4 is a cut side view schematically showing the vicinity of A-A 'of the sealing device 7 of the present invention shown in FIG. As shown in FIG. 4, the right-side bearing portion (bearing case) 24 that holds the entire seal roll of the four-way seal roll 20 and the right-side bearing portion (bearing case) 25 that holds the entire seal roll of the four-side seal roll 21 are the right-side roll. The right side bearing portion (bearing case) 25 on the back side when viewed from the front is fixed by a threaded portion 50.

  On the other hand, the right side bearing portion (bearing case) 24 on the front side in front view is slidably fitted in the cut portion of the right roll base 28 and can be moved back and forth in front view. In the conventional sealing device, a pressing mechanism is provided for the movable bearing portion (bearing case) 24. However, in the present invention, there is no pressing mechanism. A front plate 27 is fixed to the left end of the right roll base 28.

  FIG. 5 is a cut side view schematically showing the vicinity of B-B ′ of the sealing device 7 of the present invention shown in FIG. As shown in FIG. 5, the vicinity of the right end of the seal roll body in the four-sided seal roll 20 on the front side when viewed from the front and the vicinity of the right end of the seal roll main body on the four-sided seal roll 21 on the rear side when viewed from the front are pressed against each other. They are arranged in parallel and are driven to rotate in the opposite direction.

  A right cam follower mechanism 70 is provided near the right end of the seal roll main body of the four-way seal roll 20, and the right cam follower mechanism 70 is in contact with the right handle 30 and the press-contacting screwingly engaged with the right handle 30. The plate 32, two cam followers 34 that are in contact with the four-way seal roll 20, and an elastic member 33 fitted between the cam follower 34 and the pressing plate 32.

  The entire right cam follower mechanism 70 is attached to the front plate 27. When the right handle 30 is rotated to the right, the pressing plate 32 that is screw-engaged is moved slightly to the rear side, and the four-side seal roll. The pressing force of 20 will increase.

  On the other hand, when the right handle 30 is rotated counterclockwise, the pressing plate 32 that is screw-engaged is slightly moved to the front side, and the pressing force of the four-side seal roll 20 is reduced. The pressing force necessary for the four-side seal roll operation is generated. The elastic member 33 fitted between the rotating body 34 and the pressing plate 32 is usually a spring member, and the fluctuation of the repulsive force generated by the pressing force applied to the four-way seal roll 20 is reduced. It has a role to absorb.

  5, the right cam follower mechanism 70 installed near the right end of the seal roll body of the four-way seal roll 20 has been described. However, as shown in FIG. 3, a similar cam follower mechanism is used for the seal roll body of the four-way seal roll 20. It is also installed near the left end.

  That is, the left cam follower mechanism formed of the same member moves in the same manner as the right cam follower mechanism 70, and as a result, the multi-row seal roll described in the present invention in cooperation with the right cam follower mechanism 70. Thus, it is possible to apply a pressing force necessary for the four-side seal roll operation to the sandwiched two packaging films without generating distortion in the roll axis direction at the shaft support portion having a small diameter.

  FIG. 6 is a cut side view schematically showing the vicinity of C-C ′ of the sealing device 7 of the present invention shown in FIG. As shown in FIG. 6, the vicinity of the center of the seal roll body in the four-side seal roll 20 on the front side when viewed from the front and the vicinity of the center of the seal roll body on the four-side seal roll 21 on the rear side when viewed from the front are They are arranged in parallel and are driven to rotate in the opposite direction.

  A rear cam follower mechanism 80 is provided near the central portion of the seal roll body of the four-way seal roll 21, and the rear cam follower mechanism 80 is engaged with the rear handle 40 and the rear handle 40 by screwing. The pressing plate 42, the two cam followers 44 in contact with the four-way seal roll 21, and the elastic member 43 fitted between the cam follower 44 and the pressing plate 42.

  The entire rear cam follower mechanism 80 is attached to the rear plate 29, and when the rear handle 40 is rotated to the right, the pressing plate 42 that is screw-engaged is moved slightly to the front side, and the four-side seal is formed. The pressing force to the roll 21 increases.

  On the other hand, when the rear handle 40 is rotated counterclockwise, the pressing plate 42 that is screw-engaged slightly moves to the rear side, and the pressing force to the four-side seal roll 21 is reduced. The pressing force necessary for correcting the distortion in the roll axis direction accompanying the pressing force applied by the cam follower mechanism on the front surface side is appropriately adjusted. The elastic member 43 fitted between the rotating body 44 and the pressing plate 42 is usually a spring member, and the fluctuation of the repulsive force generated by the pressing force applied to the four-side seal roll 21 is reduced. It has a role to absorb.

  By applying such a roll pressing mechanism to a sealing device of a roll type automatic packaging machine, the effects of the present invention are sufficiently exerted, and the sealing roll pressing mechanism in the multi-row roll type automatic packaging machine according to the present invention is used. According to this, it is possible to avoid a situation in which the mutual pressing force of the central portion of the seal roll due to distortion in the roll axial direction due to the addition of the pressing force is insufficient, and thus it is possible to suppress the occurrence of poor sealing at the central portion of the sandwiched packaging film. .

  The embodiment of the present invention is an example for embodying the present invention, and has a corresponding relationship with the invention-specific matters in the claims, but is not limited thereto. Various modifications can be made without departing from the scope of the present invention.

  For example, although the automatic filling and packaging machine of the present invention shown in FIGS. 1 to 6 has been described with an example using a four-side seal roll, the invention is not limited to this, and a multi-row three-way generally used It can also be applied to a seal roll type automatic filling and packaging machine. That is, the roll pressing mechanism of the present invention can be appropriately employed for various automatic filling and packaging machines using a multi-row long axis heat seal roll.

  Moreover, although the roll pressing mechanism of the present invention shown in FIGS. 1 to 6 has been described with an example using two front side cam follower mechanisms and one rear side cam follower mechanism, the present invention is not limited to this. Any number of cam follower mechanisms can be provided on the front side or the rear side depending on the length of the seal roll body and the degree of distortion of the seal roll body.

It is the front view which carried out the partial cross section display in the four-side seal roll type automatic packaging machine concerning this invention. It is the right view which carried out the partial cross section display in the four-side seal roll type automatic packaging machine concerning this invention. It is the front view which expanded and partially displayed the cross-section of the sealing apparatus 7 concerning this invention. FIG. 4 is a cut side view schematically showing by cutting the vicinity of A-A ′ of the sealing device 7 of the present invention shown in FIG. 3. FIG. 4 is a cut side view schematically showing the vicinity of B-B ′ of the sealing device 7 of the present invention shown in FIG. 3 by cutting. FIG. 4 is a cut side view schematically showing by cutting the vicinity of C-C ′ of the sealing device 7 of the present invention shown in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Four-way seal roll type automatic packaging machine 2 Hopper 3 Slide weighing board 4 Collecting chute 5 Opening / closing shutter 6 Vertical chute 7 Sealing device 8 Slitting device 9 Cutter device 10 Slide base 11 Operation box 20 Front side four-side seal roll 21 Rear side four-side seal roll 22 Right side Shaft support portion 23 Left shaft support portion 24, 25 Right bearing portion (bearing case)
26 Left bearing part (bearing case)
27 Front plate 28 Right roll base 29 Rear plate 30 Right handle 31 Left handle 32, 42 Pushing plate 33, 43 Elastic member 34, 44 Cam follower 40 Rear handle 70 Right cam follower mechanism 80 Rear cam follower mechanism

Claims (3)

A pair of long-axis seal rolls that are pressed against each other while rotating in reverse, while sandwiching two packaging films and fusion-bonding them into a packaging bag shape, simultaneously filling the packaging bag with raw materials (contents) A sealing device for a multi-row roll type automatic filling and packaging machine for manufacturing
The long shaft seal roll pressing mechanism in the sealing device is constituted by a cam follower mechanism that directly presses the long shaft seal roll body. The long-axis seal roll pressing mechanism is composed of a cam follower mechanism that directly presses the long-axis seal roll main body on the front side and the rear side in front view,
The long shaft seal roll on the front side is provided with two cam follower mechanisms that press the vicinity of both ends of the seal roll body from the front toward the rear.
The multi-row roll type automatic filling and packaging machine according to claim 1, wherein the long-axis seal roll on the rear surface side is provided with one cam follower mechanism that presses the vicinity of the center of the seal roll body from the rear surface toward the front surface. Sealing device. The cam follower mechanism on the front side is set to apply a pressing force necessary for a sealing operation,
The multi-row roll according to claim 1 or 2, wherein the rear cam follower mechanism is set so as to correct a distortion in a roll axial direction due to the pressing force applied by the front cam follower mechanism. Type automatic filling and packaging machine sealing device.