JPH10324313A - Heat seal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a driving gear even when a heater roller is turned during the cleaning in a seal device capable of setting an opening angle to be large. SOLUTION: Roller gears 12 which are respectively provided on a pair of heater rollers are connected to each other through interlocking gears 11, a drive motor M to drive the interlocking gears 11 is connected thereto, the axis X of rotation of a roller frame is set on the axis of the interlocking gear 12 on the open side, and the axis X of rotation of the roller frames 1a, 1b is located on the interlocking gears 11 when opened so that the roller gears 11 are turned, and the engagement condition of the gears can be kept irrespective of the opening/closing condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sealing apparatus for heat sealing a heat fusible laminated paper.

[0002]

2. Description of the Related Art As shown in FIG. 7, a heat-fusible laminated paper is folded in two in the width direction, and the laminated paper is inserted between a pair of heating rollers R1 and R2 rotating in opposite directions. Heat-sealing the overlapping side edges of the laminated paper with the circular heating surface 2 of the heating rollers R1 and R2,
In addition, a heat sealing apparatus in which the laminated paper P is heat-sealed in the width direction by the axial heating surfaces 3 of the heating rollers R1 and R2 is conventionally known. In such a heat sealing device, the rotation of the motor M is transmitted to one heating roller R1, and the heating roller R1 is rotated.
One rotation is transmitted to the other heating roller R2 via the gear 11 meshing with the other.

By the way, when the heating rollers R1 and R2 of the heat sealing device are in contact with each other, when the laminated paper P is replaced, the paper passing operation for inserting the laminated paper P between the pair of heating rollers R1 and R2 is performed. This is extremely difficult, and there is a risk that a fingertip or the like may be bitten by the pair of heating rollers R1 and R2 during threading. In order to solve the above-mentioned problems, in a heat sealing apparatus, a pair of heating rollers R1 and R2 are normally supported so as to be openable and closable, and the paper threading operation is performed in a state where the pair of heating rollers R1 and R2 are opened. I'm trying to do it.

[0004] If the interlocking gear 11 is disengaged when the heating rollers R1 and R2 are opened, the relative positions of the axial heating surfaces 3 provided on the pair of heating rollers R1 and R2 may be shifted. It is necessary to open the pair of heating rollers R1 and R2 to such an extent that the engagement of the interlocking gear 11 does not come off.

[0005] To solve the above problems, the present applicant has
The invention of Japanese Utility Model Publication No. 7-38105 is disclosed. In the above-mentioned application, the roller frame is connected by a detaching / connecting device, and the center axis X of the frame is set to an outer end on a meshing line passing through a pitch point of the gear for interlocking rotation or a point outside the gear on the meshing line within a predetermined distance range. With the pin 16 and the hinge 15 to be positioned, the pair of heater rollers can be opened largely (an angle of about 30 degrees), and the engagement of the interlocking gear 11 does not come off.

[0006]

By the way, the above-mentioned invention discloses that when a pair of heater rollers is opened,
As the opening angle of the heater roller increases,
When the meshing range of the teeth of the interlocking gear is reduced and the dirt such as glue adhered to the heater roller is usually cleaned, the seal roller is rotated with the opening angle largely opened, and scraped off with a wire brush.

At this time, as a measure for increasing the opening angle, the rotating shaft of the roller frame is positioned near the outer end of the interlocking gear. When the roller is rotated, there still remains a problem such as tooth contact or chipping due to disengagement caused by an assembly error in which the rotation shaft of the roller frame is positioned near the outer end of the interlocking gear.

According to the present invention, a pair of roller gears are respectively connected to an interlocking gear, and a rotation support shaft of the roller frame is provided on the interlocking gear rotation shaft on the side of the interlocking gear meshed with the interlocking gear on the side away from the roller frame. An object of the present invention is to provide a heat sealing device capable of maintaining a meshing state of teeth regardless of the occasion.

[0009]

According to the present invention, in order to solve the above-mentioned problems, roller gears respectively provided on the pair of heating rollers are connected to respective interlocking gears, and the two interlocking gears are meshed. The interlocking gear is rotated by a drive motor, a rotation support shaft of a roller frame is provided on the interlocking gear rotation axis, and the gear surface of the roller gear provided on the separation side heating roller meshes with the interlocking gear surface at the time of separation. By positioning the rotation support shaft of the roller frame so as to rotate, the meshing state of the teeth can be maintained regardless of opening and closing, and the gap between the pair of heating rollers can be largely opened.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
This will be described with reference to the drawings. As shown in FIG. 1, a pair of heating rollers R1 and R2 are provided inside a rectangular roller frame 1.
Is incorporated. The heating rollers R1 and R2 have cylindrical heating surfaces 2 and 2 at upper and lower portions, respectively.
An axial heating surface 3 is provided between them. Here, the heating rollers R1 and R2 are for forming a bag portion by heat-sealing the two-folded laminated paper in the length direction and the width direction, as long as at least one of the rollers is heated by a heater. Good. The pair of heating rollers R1 and R2 have upper and lower roller shafts 4, and each roller shaft 4 is rotatably supported by a bearing 7 supported by the upper frames 5 and 6 of the roller frame 1.

A roller gear 12 is attached to the roller shaft 4 penetrating the upper frame 5 together with the heating rollers R1 and R2.
The respective roller gears 12 and 12 are linked gears 11 and 1
1 is engaged. A motor M is connected to one of the shafts of the interlocking gears 11 and 12. When the motor M rotates, the interlocking gears 11 and 11 rotate in opposite directions, and the interlocking gears 11 and 11 are connected to the connected roller gear 1 respectively.
The rotations opposite to each other are transmitted to 2, 2. Thereby, the heating rollers R1 and R2 rotate, respectively, and feed the heat-fusible laminate paper in one direction while sealing.

The movable roller frame 1b is provided with a hinge portion for holding the contact lines of the heating rollers R1 and R2 on the upper frame 5 and the lower frame 6 so as to be separated from each other, on the line of the rotating shaft of the interlocking gear 11. When the roller frame 1b rotates, the roller frame 1b rotates about the rotation center axis X of the roller frame of the interlocking gear 11. A coupling 17 is further attached to each of the upper frame 5 and the lower frame 6 on the movable roller frame 1b, and the frames 1a and 1b are held in a closed state by the engagement of the coupling 17.

The connecting member 17 comprises a receiving member 18 and a hanging member 19, and the receiving member 18 is attached to the lower surface of one frame 1a. The hanging tool 19 includes an operation lever 20.
The two ends of the U-shaped engagement frame 21 engageable with the receiving member 18 are rotatably mounted in the middle, and the tip of the operation lever 20 is a pin 22 at the other end of the other frame 1b.
It is rotatably attached to. It should be noted that even one connecting member 17 can hold the frames 1a and 1b in a closed state.

FIG. 2 shows the connection status of the present invention. Usually, such a state is formed during heat sealing, and the frames 1a and 1b are held in a closed state by the connecting member 17. The interlocking gear 11 and the roller gear 12 are composed of spur gears having the same diameter, and have smaller diameters than the outer diameter of the cylindrical heating surface 2 of the heater roller. Therefore, the roller gear 12 and the interlocking gear 11 cannot be properly connected unless the interaxial distance between the interlocking gears 11 is shorter than the interaxial distance between the roller gears 12 and 12.

FIG. 3 shows a situation in which the connection of the present invention has been released. When the connecting tool 17 is opened, the U-shaped engagement frame 21 is disengaged from the receiving tool 18, and the roller frame 1 is rotated about the rotation center axis X of the roller frame of the interlocking gear 11.
b rotates. At this time, as the rotation of the roller frame 1b progresses, the roller gear 12 rotates along with the engagement of the interlocking gear 11 stopped at this time, and accordingly, the heater roller also rotates. That is, it operates as if the axial heating surface 3 of the heating roller R2 is displaced.

Here, in order to clean the cylindrical heating surface 2 and the heating surface 3 of the heating rollers R1 and R2, when the motor M is rotated in the inching mode, the axial heating surface 3 of the heating roller R2 is opened with the opening. Rotate from the shifted position. Since the interlocking gear 11 and the roller gear 12 are constituted by spur gears having the same diameter, no substantial deviation occurs. When the motor M is stopped and the roller frame 1b is closed,
It rotates along with the engagement of the interlocking gear 11, and apparently returns to the position where the axial heating surface 3 of the heating roller R2 has shifted from the shifted state.

FIG. 4 shows a second embodiment of the present invention.
2 shows a case where the rotation center axis X of the roller frame of FIG. In such a case, the interlocking gear 11 is provided with the rotation center axis X of the roller frame.
Gear 11 having no open side roller frame 1b
And the roller gear 12 is connected to the interlocking gear 1.
1 and also arranged on the roller frame 1b.

FIG. 5 shows an open state of the embodiment. When the connecting tool 17 is opened, the U-shaped engagement frame 21 is disengaged from the receiving tool 18, and the roller frame 1b rotates about the rotation center axis X of the roller frame of the interlocking gear 11. At this time, the interlocked gear 11 having no rotation center axis X of the roller frame meshes with the interlock gear 11 having the rotation center axis X of the roller frame stopped at this time as the rotation of the roller frame 1b proceeds. , The roller gear 12 and the heater roller also rotate accordingly. That is, it operates as if the axial heating surface 3 of the heating roller R2 is displaced.

Here, in order to clean the cylindrical heating surfaces 2 and 3 of the heating rollers R1 and R2, the motor M is rotated in the inching mode. Rotate from the shifted position. Since the interlocking gear 11 and the roller gear 12 are constituted by spur gears having the same diameter, no substantial deviation occurs as in the first embodiment. Here, when the motor M is stopped and the roller frame 1b is closed, the roller rotates along the meshing of the interlocking gear 11, and returns to a position where the heating surface 3 of the heating roller R2 apparently has shifted from the displaced state.

FIG. 6 is a cross-sectional view of the heater roller shaft 4 of the lower frame 6, showing the support of the bearing 7 supported by the lower frame 6, while the bearing 7 supporting the roller shaft 4 of the heating roller R1 is The guide hole 8 is supported along the guide hole 8 and is positioned by abutting on the closed end of the guide hole 8.

On the other hand, a bearing 7 for supporting the roller shaft 4 of the heating roller R2 is slidably supported along a guide hole 9. The guide hole 9 extends long toward the bearing 7 supporting the roller shaft 4 of the heating roller R1, and a spring 10 incorporated in the guide hole 9 connects the bearing 7 to the bearing supporting the heating roller R1. Pressing toward. The pressing force adjusts the sealing strength by the screw 23, and the pair of heating rollers R1 and R2 are pressed against each other.

Further, the relationship of the opening amount according to the present invention is based on the fact that the heating roller R1 opened from the rotation center axis X of the roller frame.
The greater the distance to the axis, the greater the opening, and if the embodiment is to be raised, the rotation center axis X of the roller frame will be greatly opened if the rotation center axis X of the roller frame is provided at the position of the second embodiment. On the other hand, the fixed side and the open side may be reversed.

[0023]

As described above, according to the present invention, the drive motor for driving the interlocking gears which are connected to the roller gears respectively provided on the pair of heating rollers by the interlocking gears and mesh with the interlocking gears. A separation support shaft for a roller frame is provided on the separation gear rotating shaft on the separation side, and the separation support for the roller frame is provided such that the roller gear provided on the separation side heating roller on the separation gear surface rotates when the separation is performed. By positioning the shaft, the meshing state of the teeth can be maintained irrespective of opening and closing, and even in the paper threading operation, the seal roller on the separation side can be separated from the separating gear radial distance parallel to the dividing line. Therefore, the paper threading operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a top view showing an embodiment of the present invention.

FIG. 3 is a top view showing an opening of the roller frame of the present invention with respect to a rotation center axis X;

FIG. 4 is a top view of a second embodiment showing the embodiment of the present invention.

FIG. 5 is a top view of the second embodiment showing the roller frame of the present invention opened relative to the rotation center axis X;

FIG. 6 is a sectional view of a lower frame showing an embodiment of the present invention.

FIG. 7 is a side view showing a conventional example.

[Explanation of symbols]

 1a. Frame fixed side 1b. Frame open side 5. Roller frame upper frame 6. Roller frame lower frame 7. Bearing 11. Interlocking gear 12. Roller gear 17. Coupling tool 18. Receiver 19. Hanger R1. Heater roller fixed side R2. Heater roller open side Motor X. Roller frame rotation center axis X

Claims (1)

[Claims] 1. A roller frame, comprising a pair of heating rollers, both ends of which are rotatably supported by the roller frame and one end of which is provided with a gear for interlocking rotation,
In a heat seal device in which the roller frame is supported so as to be separated in parallel to the contact line of the pair of heating rollers, and the pair of frames is provided with a detachable connection tool, The provided roller gears are connected to the respective interlocking gears, the interlocking gear formed by meshing the two interlocking gears is rotated by a drive motor, and a rotation support shaft of a roller frame is provided on the interlocking gear rotation axis, and In this case, a heat seal device is provided in which a rotation support shaft of a roller frame is positioned such that a gear surface of a roller gear provided on a heating roller on a separation side meshes with the interlocking gear surface to rotate.