JP5823768B2 - Sealing device - Google Patents

Description

The present invention relates to a sealing device used in an automatic bagging and packaging machine. More specifically, the present invention relates to a heat seal device that eliminates the need for adjusting the angle of the seal bar when replacing the disconnected cartridge heater inserted in the seal bar and facilitates replacement of the cartridge heater.

When a food packaging bag is sealed, heat sealing is performed in which a pair of seal bars are pressed from both sides and sealed in the bag mouth of the overlapped film sheet.

As shown in FIG. 8, the conventional seal bar 10 is attached to each end of the upper and lower two slide shafts 14 via an attachment base 13. A rod-shaped cartridge heater 11 is inserted into an attachment hole formed in the longitudinal direction of the seal bar 10 and fixed with screws.

Since the cartridge heater 11 is a consumable item and is disconnected when it reaches the end of its life, it is necessary to replace the disconnected cartridge heater 11 with a new cartridge heater 11. For replacement, the cartridge heater 11 is pulled out from the seal bar 10 in the direction of the arrow in FIG. At that time, a space corresponding to the length of the cartridge heater 11 is required on the side surface of the seal bar 10.

However, since there is a seal bar 10 and a cooling device of the adjacent heat seal device 12 in the space area, even if it is attempted to remove the disconnected cartridge heater 11, this may interfere with the cartridge heater 11. It cannot be removed. Therefore, the screw 30 for fixing the mounting base 13 shown in FIG. 8 is loosened, the seal bar 10 is removed from the slide shaft 14 together with the mounting base 13, and then the cartridge heater 11 is removed from the seal bar 10. It was. After replacing the removed cartridge heater 11 with a new cartridge heater 11, the mounting operation is completed by attaching the mounting base 13 to the slide shaft 14. Although the two mounting bases 13 shown in FIG. 8 have different shapes, the replacement work is the same because they are similar in structure.

JP2008-150087

However, since the mounting base 13 is rotatably fitted to the cylindrical slide shaft 14, when the mounting base 13 is fixed with the screw 30, the posture of the opposing seal bar 10 is adjusted. In addition, the angle of the seal bar 10 needs to be adjusted, and there is a problem that it takes time to mount.

Therefore, according to the present invention, when the cartridge heater 11 is replaced, if the cartridge heater 11 is mounted, the angle of the cartridge heater 11 can be automatically determined. It is an object to provide a sealing device that facilitates.

A mounting base is attached to the tip of a pair of slide shafts, and a seal bar is provided opposite to each of the mounting bases, and a cartridge heater is inserted into a mounting hole formed in the longitudinal direction of the seal bar, In a sealing device in which the slide shaft reciprocates in the opposite direction so that the pair of seal bars contact and separate, and the bag mouth of the packaging bag is clamped and sealed with the seal bar, a stopper is provided on the slide shaft adjacent to the mounting base. A contact plate is fixed to the mounting base, and a contact surface is formed on the stopper to contact the contact plate. It is characterized by determining the posture .

With the above configuration, the sealing device of the present invention has a stopper provided on the slide shaft and a contact plate fixed to the attachment base, so that the contact plate abuts against the contact surface of the stopper in a normal posture of the attachment base. Since the angle of the seal bar is not required by contacting and determining the attitude of the mounting base, the cartridge heater can be easily replaced.

Top view of automatic bagging and packaging machine Side view of heat sealing device Detailed side view of heat seal device Front view of the mounting base with the cartridge heater of the heat seal device inserted Perspective view of stopper Illustration of cartridge heater replacement Top view of horizontal packaging machine Side view of a conventional heat seal device Perspective view of a conventional automatic bagging and packaging machine

The sealing device of the present invention will be described below.
An outline of the rotary type automatic bagging and packaging machine shown in FIG. 1 will be described. This automatic bagging and packaging machine is a so-called double-type packaging machine, and can perform some packaging operation on two packaging bags at the same time in each section of the rotor 15 every 30 degrees.

The section (A) is a bag removing section for supplying the packaging bag 18 to the clamp 17. The sections (B) and (C) are printing sections for printing on the packaging bag 18 and inspecting the printed packaging bag 18. Section (D) is a bag opening section that opens the bag opening of the packaging bag 18. The section (E) is a filling section in which the package bag 18 is filled with an article to be packaged by the input mechanism 19. The sections (I), (J), and (K) are seal sections that seal the bag mouth with the heat seal device 12. The section (L) is a cooling section that cools the bag mouth by pinching it with a cooling bar.

Next, the heat seal device 12 will be described. As shown in FIG. 2, a cam 20 connected to a motor (not shown) is connected to one end of a substantially U-shaped cam arm 21 pivotally supported on a machine base so as to be swingable. One end of the upper and lower rods 22 is pivotally supported on the other end of the upper and lower rods.

FIG. 3 is a partially enlarged view of FIG. 2, and the other end of the upper and lower rods 22 is connected to a relay plate 24 supported by a shaft 23. The relay plate 24 rotates about a shaft 23. A swing plate 26 is pivotally supported so as to be completely independent of the relay plate 24. The relay plate 24 and the swing plate 26 are connected by a left and right rod 25, and the rotational force of the relay plate 24 is transmitted to the swing plate 26 via the left and right rod 25.

One end of two relay rods 27 is connected to the swing plate 26 across the shaft 23, and one end of the slide shaft 14 is connected to the other end of the two relay rods 27, respectively. As the relay plate 24 rotates, the slide shaft 14 reciprocates in different directions.

As shown in FIG. 4, the mounting base 13 is fitted into the other end of the slide shaft 14 and fixed with a screw 30. When the screw 30 is loosened, the mounting base 13 is rotatable with respect to the slide shaft 14. In addition, a donut-shaped stopper 29 is fixed to the slide shaft 14, and a convex contact plate 28 is fixed to the mounting base 13 with screws. Here, the stopper 29 and the contact plate 28 are defined as positioning means. Although the shapes of the two mounting bases 13 shown in FIG. 3 are different, the structures of the stopper 29 and the contact plate 28 are the same.

As shown in FIG. 5, the stopper 29 is formed with a contact surface 29A with which the abutting plate 28 abuts by providing a step on the stopper 29 itself. Although the stopper 29 and the mounting base 13 are adjacently fixed to the end of the slide shaft 14, the step is formed larger than the thickness of the abutting plate 28. When the screw 30 is loosened, the abutting plate 28 can rotate between the thin surfaces 29B of the stopper 29, so that the mounting base 13 can rotate at this angle. Further, the stopper 29 in the front views shown in FIGS. 4 and 6 shows only the thick surface 29C.

Next, the operation of the heat seal device 12 will be described. As shown in FIG. 2, when the cam 20 is rotated by the motor (not shown), the cam arm 21 swings, so that the vertical rod 22 moves up and down.

As shown in FIG. 3, the vertical movement of the vertical rod 22 is converted into the horizontal movement of the left and right rod 25 through the swinging movement of the relay plate 24. The left / right motion of the left / right rod 25 is converted into the left / right motion of the two relay rods 27 through the swing motion of the swing plate 26.

Since the left and right movements of the two relay rods 27 are the left and right movements of the two slide shafts 14, the movement directions of the two slide shafts 14 are reversed.

The seal bar 10 fixed to the two slide shafts 14 via the mounting base 13 is moved toward and away from the two slide shafts 14 by the movement of the two slide shafts 14 in the left and right direction, and is wrapped between the seal bars 10. Heat sealing is performed by pinching the bag mouth of the bag 18.

Next, explanation will be given when the cartridge heater 11 is replaced. The left mounting base in FIG. 6 shows a disconnected cartridge heater 11, and the right mounting base in FIG. 6 shows a normal cartridge heater 11. When replacing the disconnected cartridge heater 11 on the left side, the right mounting base is an obstacle to the work.

Therefore, first, as shown in (1) of FIG. 6, the screw 30 is loosened, and the fixing of the mounting base 13 to the slide shaft 14 is loosened. Next, as shown in (2), the mounting base 13 is rotated counterclockwise to an angle at which the right mounting base 13 does not interfere when the disconnected cartridge heater 11 is removed. Next, as shown in (3), the disconnected cartridge heater 11 is removed from the seal bar 10 of the mounting base 13.

Next, a new cartridge heater 11 is attached to the seal bar 10 from which the disconnected cartridge heater 11 has been removed, and the operation is performed in the reverse order to the removal, so that the initial state of (1) is obtained.

At this time, the mounting base 13 is reversely rotated until the contact plate 28 contacts the contact surface 29A of the stopper 29 and the rotation is restricted.

Since the angle adjustment of the seal bar 10 has been completed in advance, and the stopper 29 is fixed to the slide shaft 14 after being aligned with the position where the contact surface 29A contacts the contact plate 28, the mounting The base 13 can be correctly returned to the posture before being rotated, and the restoration to the appropriate state can be easily performed.

Up to this point, the case of the rotary type automatic packaging and packaging machine has been described. However, a space equivalent to the length of the cartridge heater 11 is adjacent to the side surface of the seal bar 10 such as a horizontal packaging machine as shown in FIG. It may be a packaging machine that is closed by the seal bar 10 of the heat seal device 12 or other device and cannot remove the cartridge heater 11.

The stopper 29 may have any other shape as long as it has a structure corresponding to the contact surface 29A. For example, the thickness of the thick surface 29C and the thickness of the thin surface 29B in FIG. 5 may be aligned to form a simple donut shape, and the pin may be erected at the position of the contact surface 29A. In this case, rotation of the mounting base 13 is restricted by the abutting plate 28 coming into contact with the pin, and the mounting base 13 can be correctly returned to the posture before rotating.

Further, the configuration in which the abutting plate 28 is fixed to the mounting base 13 and the stopper 29 is fixed to the slide shaft 14 has been described. However, the stopper 29 is fixed to the mounting base 13 and the slide shaft 14 is fixed to the slide shaft 14. The structure which fixed the contact plate 28 may be sufficient.

The present invention is useful, for example, in a packaging machine that uses a cartridge heater in a sealing device that seals the bag mouth of a packaging bag.

10 .. Seal bar 11 .. Cartridge heater 12 .. Heat seal device 13 .. Mounting base 14 .. Slide shaft 28 .. Contact plate 29 .. Stopper 30.

Claims (2)

A mounting base is attached to the tip of a pair of slide shafts, and a seal bar is provided opposite to each of the mounting bases, and a cartridge heater is inserted into a mounting hole formed in the longitudinal direction of the seal bar, In the sealing device in which the slide shaft reciprocates in the opposite direction, the pair of seal bars come in contact with and separated from each other, and the bag mouth of the packaging bag is clamped and sealed with the seal bar.
A stopper is provided on the slide shaft adjacent to the mounting base, a contact plate is fixed to the mounting base, and a contact surface with which the contact plate contacts the stopper is formed. A sealing device, wherein a contact plate abuts against a contact surface of a stopper to determine a posture of a mounting base . The sealing device according to claim 1 , wherein the stopper is fixed to the mounting base, and the contact plate is fixed to the slide shaft .

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