JP4435537B2 - Seal roll mechanism in roll type automatic packaging machine - Google Patents

Description

  The present invention relates to a pair of heat seal roll mechanisms that perform vertical heat seal or horizontal heat seal on a packaging film, and particularly relates to an improvement of a heat seal roll gap size adjusting mechanism.

Conventionally, as described in, for example, Patent Document 1, a pair of heat seals for filling and wrapping a material to be packaged while rotating while sandwiching the packaging film and heat-sealing and transporting the packaging film in a bag shape The roll is known.
In this type of heat seal roll, heat sealing is performed while applying pressure to the roll while pressing the film when sealing the film. However, when this pressure is increased, the edge portion of the heat seal (where the heat seal starts or ends) may be cut off. On the other hand, if the pressure is weakened, heat sealing may be incomplete.
For this reason, a heat seal roll gap adjustment mechanism is provided as a mechanism for adjusting the pressure applied between the heat seal rolls in the roll type automatic packaging machine.

FIG. 3 is a configuration diagram showing an example of a conventional heat seal roll gap adjusting mechanism , which is a view of one seal roll mechanism (for example, a first horizontal seal roll mechanism) in an automatic packaging machine as viewed from the front left side. It is. This seal roll mechanism supports a pair of heat seal rolls while pressing each other, and performs a heat seal by sandwiching a packaging film between the seal rolls. As shown in FIG. 3, the shaft portion 23 of the fixed-side seal roll 21 is attached to the fixed roll base 301 fixed to the machine base 304 of the automatic packaging machine via a bearing 25. A shaft portion 22 of the movable side seal roll 20 is attached to the movable roll base 300 configured to be movable back and forth so as to press the fixed side seal roll 21 via a bearing 24.

  The movable roll base 300 is fixedly attached with guide guide bars 305 and 306 and a connecting plate 307 connecting the guide guide bars 305 and 306. The guide guide rods 305 and 306 are pivotally supported in a penetrating manner with respect to the fixed roll base 301 and the machine base 304, and are attached to the left and right in FIG.

Further, the movable roll base 300, the guide guide rods 305 and 306, and the connecting plate 307 are pressed from the right side in FIG. 3 by the air cylinder 302 and the cylinder shaft 303, and the fixing member 308 attached to the machine base 304 and the fixing member. It is received on the left side in FIG. 3 by a stopper mechanism constituted by a gap adjusting screw 309 attached to 308 in a screwed state. That is, the air cylinder 302 presses the movable-side seal roll 20 against the fixed-side seal roll 21 via the movable roll base 300, and the gap adjusting screw 309 maintains the gap dimension between the seal rolls adjusted in advance. Yes.
JP 2000-238707 A

  In such a conventional heat seal roll gap adjustment mechanism, the pressing force of the air cylinder 302 reaches the fixing member 308 on the back side of the packaging machine base 304 and the gap adjustment screw 309 via the guide guide rods 305 and 306. Therefore, the overall size of the structure (stress path) under pressure is long. For this reason, the structure of the heat seal roll gap adjustment mechanism becomes complicated, the balance of the pressing force tends to be lost, and the rotational movement of the seal roll is added to cause structural distortion of the heat seal roll gap adjustment mechanism, resulting in packaging. The finish of the bag was worse.

  In addition, the adjustment of the gap dimension between the heat seal rolls requires a very small value to cope with the variation in the thickness of the packaging film, and the gap dimension between the heat seal rolls only by the screw adjustment of the gap adjustment screw 309. It was difficult to make fine adjustments. In addition, the amount of cost is increased due to the complexity of the structure.

  The present invention was created in order to solve such a problem, and can prevent the occurrence of structural distortion, and can finely adjust the gap dimension between the heat seal rolls, further reducing the cost. It aims at providing the clearance gap size adjustment mechanism of a heat seal roll.

To solve the above technical problem, the seal roll mechanism in the roll type automatic packaging machine according to claim 1 of the present invention, by sandwiching the packaging film which is continuously transported in a state of being folded back, subjected to heat seal two A seal roll mechanism in a roll type automatic packaging machine having a plurality of sets of one seal roll, wherein the seal roll mechanism that pivotally supports the two seal rolls is a fixed roll mounting member that pivotally supports one seal roll in a fixed state; A movable roll mounting member that pivotally supports the other seal roll;
The fixed roll mounting member and the movable roll mounting member are connected and fixed, and is composed of a roll base having an integrated structure,
The fixed roll mounting member is provided with a circular or laterally substantially U-shaped hole for pivotally supporting one seal roll in a fixed state,
The movable roll mounting member has a substantially elliptical hole for pivotally supporting the other seal roll so as to be movable in the direction of the one seal roll facing the other, and the direction of the one seal roll facing the other seal roll. A pressure mechanism using an air cylinder or a spring spring that presses against and a stopper mechanism incorporating a gap adjustment mechanism between two seal rolls is provided,
The stopper mechanism is composed of a locking member, a pressure receiving rod, a gap adjusting screw and a gap adjusting nut,
One end of the locking member is fixed to the movable roll mounting member, a pressure receiving rod is mounted between one end and the other end of the locking member, and the other end of the locking member is It is connected with the clearance adjustment screw,
The pressure receiving rod operates to receive a pressing force from the movable side seal roll through one through hole of the movable roll mounting member,
The gap adjusting screw extends to the front side of the roll type automatic packaging machine through the other through-hole of the movable roll mounting member and is screwed with a gap adjusting nut. By rotating the gap adjusting nut, the packaging is performed. It is characterized in that it operates so that a minute gap value between two seal rolls can be set at the front of the machine.

  As described above, according to the gap size adjusting mechanism of the heat seal roll according to the present invention, the overall size of the structure to which the pressing force is applied is shortened to prevent the distortion of the structure body, and the principle of the insulator In addition to making fine adjustments in the gap distance between the heat seal rolls, it is possible to achieve an excellent effect that costs can be reduced.

  Embodiments of a gap size adjusting mechanism for a heat seal roll according to the present invention will be described below with reference to the drawings. First, the whole structure of the roll type automatic packaging machine which concerns on this invention is demonstrated using FIG. FIG. 1 is a front view showing a configuration example of a roll type automatic packaging machine according to the present invention.

  As shown in FIG. 1, a reel 2 is provided on the right side of a machine base 10 of a roll type automatic packaging machine 1 (hereinafter abbreviated as automatic packaging machine 1). On the reel 2, an original fabric roll wound with a packaging film is held so as to be removable. A folding mechanism 3 and a filling mechanism 4 are disposed at the upper part of the machine base 10 of the automatic packaging machine 1, and a vertical seal mechanism 5, a first horizontal seal mechanism 6, a second horizontal seal mechanism 7, A cutter mechanism 8 is provided. Furthermore, an operation box 11 for operating the automatic packaging machine 1 is provided on the left side of the machine base 10.

  Although not shown in FIG. 1, the vertical seal mechanism 5 is composed of two vertical seal rolls, and the front side vertical seal roll (movable side seal roll) is shown in FIG. 1. On the other hand, the vertical seal roll on the back side (the back side of the paper) is provided in a state facing the front side vertical seal roll in the direction perpendicular to the paper surface, and is fixed to the machine base 10 of the automatic packaging machine 1 (fixed side seal). roll).

  The horizontal seal mechanism is composed of a first horizontal seal mechanism 6 and a second horizontal seal mechanism 7, and these two horizontal seal mechanisms are shown in FIG. These two horizontal seal rolls (movable side seal rolls) have two horizontal seal rolls in pairs on the back side (back side of the paper). These two lateral seal rolls on the back side are provided facing each other in the direction perpendicular to the paper surface, and are fixed to the machine base 10 of the automatic packaging machine 1 (fixed side seal roll).

  The packaging film is made of a transparent or translucent material, for example, a base film such as PET, or a heat seal 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 heat seal film.

  The packaging film is pulled out from the original roll attached to the reel 2. The drawn packaging film is led out to a bag-making guide extending vertically in the rod shape through a guide roll of the folding mechanism 3, and the packaging film is folded in the longitudinal direction by the bag-making guide. The folded wrapping film is sent to the vertical sealing mechanism 5, and the vertical sealing roll of the vertical sealing mechanism 5 heat seals the folded ends of the folded wrapping film to form a lateral sealing mechanism directly below. Send to 6. By this vertical sealing, the packaging film is formed into a cylindrical shape.

  The cylindrical packaging film is sealed in the lateral direction (width direction) of the packaging film by the lateral sealing roll of the lateral sealing mechanism 6, and the bottom of the packaging body is formed by this lateral sealing. The filling pipe of the filling mechanism 4 is inserted into the packaging film formed in the bottomed cylindrical shape, and the raw material containing the solid matter in the hopper 9 is filled into the packaging body through this filling pipe.

  Further, the horizontal seal roll of the first horizontal seal mechanism horizontally seals the bag mouth side of the packaging film filled with the raw material while pushing the raw material filled in the package upward. Thereby, the raw material with which the bottomed cylindrical packaging film was filled is sealed. The sealed packaging film is sent to the horizontal sealing roll of the second horizontal sealing mechanism 7 immediately below. The second lateral seal roll laterally seals the lateral seal portion formed by the first lateral seal mechanism, and forms a linear seal or the like for making the lateral seal portion more reliable. Thereafter, the lateral seal portion is cut by the cutter mechanism 7 to obtain an individual package.

FIG. 2 is a configuration diagram showing a heat seal roll gap adjusting mechanism according to the present invention , which is a view of one seal roll mechanism (for example, a first horizontal seal roll mechanism) in the automatic packaging machine 1 as viewed from the front left side. FIG. As shown in FIG. 2, a fixed roll attachment member 201 and a movable roll attachment member 200 are fixed to the roll base 210 attached to the machine base of the automatic packaging machine 1 with screws.

The fixing roll mounting member 201 is cut in is provided laterally substantially U-shaped, the axial portion 23 of the fixed seal roll 21 shown by the dotted line is attached at the position fixed by interposing a bearing 25. Further, the movable roll mounting member 200 is provided with a substantially elliptical hole, and the shaft portion 22 of the movable side seal roll 20 indicated by a dotted line is mounted to be movable through a bearing 24.

  Note that the substantially U-shaped notch in the lateral direction of the fixed roll mounting member 201 is a shape that is adopted to facilitate work when the shaft portion 23 and the bearing 25 of the fixed-side seal roll 21 that is mounted are removed for repair or the like. It is good also as a hole shape which only fits the bearing 25.

  The roll base 210 supports the left side of the two heat seal rolls as viewed from the front, and the fixed side seal roll 21 and the movable side seal roll 20 are pivoted together with the right side roll base not shown in FIG. It is fixed to a packaging machine base (not shown) while being supported.

  Further, an air cylinder 202 for pressing the movable side seal roll 20 from the right side in FIG. 2 and a stopper mechanism for receiving the movable side seal roll 20 from the left side in FIG. 2 are attached to the movable roll mounting member 200. The mechanism operates to maintain a preset gap dimension between heat seal rolls.

  The cylinder body of the air cylinder 202 is screwed to the front side of the movable roll mounting member 200, and the cylinder shaft 203 presses the bearing 24 and the movable side seal roll 20 from the right side in FIG. ing. In addition, although the air cylinder 202 was demonstrated as a mechanism which is pressing the said movable side seal roll 20, it is not restricted to this, You may use a spring spring etc.

  The stopper mechanism includes a locking member 205, a pressure receiving rod 204, a gap adjusting screw 209, and a gap adjusting nut 208. One end 206 of the locking member 205 is fixed to the movable roll mounting member 200. The other end 207 of the stop member 205 is connected to a gap adjusting screw 209. The gap adjusting screw 209 extends to the front side through the through-hole of the movable roll mounting member 200 and is screwed with a gap adjusting nut 208. It is fixed so that the screw can be adjusted. A pressure receiving rod 204 is attached between the end portion 206 and the end portion 207 of the locking member 205, and the pressure receiving rod 204 passes from the bearing 24 and the movable side seal roll 20 through the through hole of the movable roll mounting member 200. Receiving pressure.

  This stopper mechanism has the principle of lever, the fixed end 206 is the fulcrum of the lever, the mounting position of the pressure receiving rod 204 is one of the operating points, and the mounting end 207 of the gap adjusting screw 209 is the other. Is the point of action. And the length between one action point and a fulcrum is shorter than the length between the other action point and a fulcrum.

  That is, with respect to the length of the fixed end 206 and the gap adjusting screw 209 mounting end 207, the advancement / retraction dimension of the pressure receiving rod 204 is determined according to the ratio of the length between the fixed end 206 and the pressure receiving rod 204 mounting position. As a result, by rotating the gap adjusting nut 208 by screwing, the gap dimension between the seal rolls can be finely adjusted.

  As described above, the heat seal roll clearance adjusting mechanism according to the present invention includes the air cylinder 202 that controls the pressing force against the heat sealing roll and the stopper mechanism that receives the pressing force in the movable roll mounting member 200. It is possible to reduce the overall dimensions of the structure, and as a result, it is possible to prevent the occurrence of structural distortion that is subject to a pressing force.

  Further, according to the lever principle, the screw dimension of the gap adjusting nut 208 operates so as to expand the advance / retreat dimension of the pressure receiving rod 204, and the gap dimension between the seal rolls can be finely adjusted.

  And since all the structural members in the heat seal roll gap adjusting mechanism are incorporated in the movable roll mounting member 200, it is possible to assemble on the desk, simplifying the work process and reducing the cost of the structural members. Became.

  In addition, the heat seal roll gap adjusting mechanism according to the present invention is a heat seal roll mechanism in three places of the vertical seal mechanism 5, the first horizontal seal mechanism 6, and the second horizontal seal mechanism 7 in the roll type automatic packaging machine of FIG. Applicable.

It is a front view which shows one structural example of the roll type automatic packaging machine by which this invention is implemented . It is the block diagram which showed the heat seal roll clearance gap adjustment mechanism which concerns on this invention. It is the block diagram which showed an example of the conventional heat seal roll clearance gap adjustment mechanism.

DESCRIPTION OF SYMBOLS 1 Roll type automatic packaging machine 2 Reel 3 Folding mechanism 4 Filling mechanism 5 Vertical seal mechanism 6 First horizontal seal mechanism 7 Second horizontal seal mechanism 8 Cutter mechanism 9 Hopper 10,304 Machine base 11 Operation box 20, 21 Roll main body 22, 23 Rotating shaft 24, 25 Bearing 200 Movable roll mounting member 201 Fixed roll mounting member 202, 302 Air cylinder 203, 303 Cylinder shaft 204 Pressure receiving rod 205 Locking member 208 Gap adjusting nut 209, 309 Gap adjusting screw 210 Roll base 300 movable roll base 301 fixed roll base 305, 306 guide guide rod 307 connecting plate 308 fixing member

Claims (1)

Sandwiches the packaging film which is continuously transported in folded state, a sealing roll mechanism in the roll type automatic packaging machine comprising a plurality of sets of two seal rolls subjected to heat-sealing,
The seal roll mechanism that pivotally supports the two seal rolls includes a fixed roll mounting member that pivotally supports one seal roll in a fixed state,
A movable roll mounting member that pivotally supports the other seal roll;
The fixed roll mounting member and the movable roll mounting member are connected and fixed, and is composed of a roll base having an integrated structure,
The fixed roll mounting member is provided with a circular or laterally substantially U-shaped hole for pivotally supporting one seal roll in a fixed state,
The movable roll mounting member has a substantially elliptical hole for pivotally supporting the other seal roll so as to be movable in the direction of the one seal roll facing the other, and the direction of the one seal roll facing the other seal roll. A pressure mechanism using an air cylinder or a spring spring that presses against and a stopper mechanism incorporating a gap adjustment mechanism between two seal rolls is provided,
The stopper mechanism is composed of a locking member, a pressure receiving rod, a gap adjusting screw and a gap adjusting nut,
One end of the locking member is fixed to the movable roll mounting member, a pressure receiving rod is mounted between one end and the other end of the locking member, and the other end of the locking member is It is connected with the clearance adjustment screw,
The pressure receiving rod operates to receive a pressing force from the movable side seal roll through one through hole of the movable roll mounting member,
The gap adjusting screw extends to the front side of the roll type automatic packaging machine through the other through-hole of the movable roll mounting member and is screwed with a gap adjusting nut. By rotating the gap adjusting nut, the packaging is performed. A seal roll mechanism in a roll type automatic packaging machine, which operates so that a minute gap value between two seal rolls can be set at the front of the machine .

Images