JP2649003B2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case in which an object to be packaged is accommodated in a pocket formed of a synthetic resin film and the opening of the pocket is opened, as in the case of packing a tablet medicine so that it is easy to take out one tablet at a time. The present invention relates to an apparatus for sealing and packaging with an aluminum sheet.

[0002]

2. Description of the Related Art Conventionally, as a packaging device as described above, a long film made of synthetic resin has been fed in one direction while a long film is being fed.
The film is heated and press-molded to form a pocket that opens on one side of the film with a fixed pitch, and after the pocket is formed, the film is wrapped around a turning roller so that the pocket opens upward. After the package is stored in the pocket by turning so that the film is wrapped around the seal receiving roller after the package is stored, the pocket is fitted into the fitting concave portion on the outer periphery of the seal receiving roller. A film is used in which a film and a long aluminum sheet are sandwiched between the sealing receiving roller and the sealing pressing roller so that the opening of the pocket is closed by the aluminum sheet.

In such an apparatus, when the operation is interrupted to stop the transport of the film, the film heated at the time of the pocket molding shrinks due to a decrease in temperature accompanying the stop of the heating, so that the aluminum sheet is removed from the pocket molding location. Until the sealing position, the arrangement pitch of the pockets becomes smaller than the regular arrangement pitch at the time of operation, so that the arrangement pitch of the fitting concave portion of the seal receiving roller does not match.

Therefore, when the film is to be transported while the pocket arrangement pitch is kept small when the operation is resumed, the film will fit into the fitting recess just before passing between the two sealing rollers. The film rises from the outer periphery of the seal receiving roller when the outer surface of the pocket hits the opening edge of the fitting concave portion, and the film is lifted from the outer periphery of the seal receiving roller, and the film is lifted by the seal roller. Inconveniences such as the inability to smoothly pass through the gap and the pocket being crushed and deformed when passing between the sealing rollers occur.

For this reason, until the contracted portion of the film has passed between the two sealing rollers after the operation is resumed, the contracted portion of the film is extended and the arrangement pitch of the pockets is used for the sealing. It is necessary to carry the sheet while maintaining a state in which it fits the arrangement pitch of the fitting concave portion of the receiving roller.

[0006]

As means for transporting a stretched portion of a film when the film is restarted, conventionally, an operator manually pulls the film in a direction opposite to a feeding direction. By pressing against the outer periphery of the seal receiving roller while stretching and stretching, the pocket is fitted into the fitting recess so that the film smoothly passes between the two sealing rollers and the sealing is reliably performed. The way had been done.

For this reason, not only must the worker be present every time the operation is resumed, but also there is a danger that the worker may be caught between his / her seal rollers.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and as a means for solving the problem, a pocket is inserted into the outer periphery of a turning roller to pull in a circumferential direction. Form a locking recess that creates a hook,
The turning roller is provided with a brake that suppresses the rotation of the turning roller in the feed direction, and when the film is separated from the outer periphery of the sealing receiving roller immediately before being sandwiched between both sealing rollers, a detection signal for operating the brake is generated. The detection means for outputting is provided.

[0009]

According to the present invention, when the film shrinks while the operation is stopped and separates from the outer periphery of the sealing receiving roller immediately before both the sealing rollers, the detecting means detects this. The brake is operated by the detection signal output from the detection means.

Therefore, when the operation is resumed, the rotation of the deflecting roller in the feed direction is suppressed by the operation of the brake, and the film is locked in the circumferential direction by its pockets entering the locking recesses of the deflecting roller. The pocket is conveyed in a stretched state between the location where the pocket has been inserted and the location where the pocket has been fitted into the fitting recess between the two sealing rollers.

At this time, the arrangement pitch of the pockets of the film coincides with the arrangement pitch of the fitting recesses of the receiving roller for sealing due to the stretching of the film.
The pocket is securely fitted into the fitting recess, and the film comes into close contact with the outer periphery of the sealing receiving roller. Accordingly, the detection by the detection means is not performed, the output of the detection signal is stopped, and the brake is released.

Thereafter, when the film shrinks again with the release of the brake and separates from the outer periphery of the seal receiving roller, the detecting means outputs a detection signal again to operate the brake, and the film is pulled. Will be prolonged.

Thus, while the pocket is successively fitted into the fitting recess, the film closely contacts the outer periphery of the sealing receiving roller and smoothly passes between the sealing pressing roller and the sealing by the aluminum sheet. Done.

When the shrinked portion of the film has passed between the two sealing rollers, the pockets that subsequently pass between the two sealing rollers are formed by heating after resuming operation. The arrangement pitch of the pockets coincides with the arrangement pitch of the fitting concave portions of the seal receiving rollers, so that the film can smoothly pass between the two sealing rollers and a reliable seal can be obtained without extending the film.

[0015]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the packaging apparatus of the present embodiment, an unillustrated package is packaged through the following process while the synthetic resin long film a unwound from the unillustrated roll is transported in one direction.

A film a is first formed by press forming in a molding machine 2 in a state of being softened by being heated by a heating machine 1 so as to be opened on one side of the film a and protruded to the other side. A pocket b not shown in FIG. 1 is formed at a constant arrangement pitch in the transport direction.

After the formation of the pocket b, the feeding roller 4
The film a slides on the guide rail 7 in a horizontal posture in which the pocket b is opened upward by being wrapped around the feed length adjusting dancer roller 5 and the turning roller 6 in order. An object to be packaged (not shown) is stored in the pocket b.

Thereafter, the film a passes between the sealing receiving roller 10 and the sealing pressing roller 11 while being clamped in a heated state together with the long aluminum sheet c. The pocket b is sealed so as to close the opening.

At this time, the film a is non-movably fitted in the circumferential direction in the fitting concave portion 12 formed on the outer periphery of the seal receiving roller 10 so that the projecting portion of the pocket b is inserted into the film. 10 and is fed in close contact with the outer periphery of the receiving roller 10 for sealing.

With the above, the packaging is completed, and the film a is
After being wrapped around the plurality of delivery rollers 13, it is sent to a subsequent process such as cutting.

The packing device of this embodiment contracts during the stoppage of operation and the arrangement pitch of the pockets b is changed to the receiving roller 10 for sealing.
A mechanism for extending the film a shorter than the arrangement pitch of the fitting recesses 12 when the operation is resumed.
Hereinafter, the configuration will be described.

A plurality of locking recesses 16 are formed in the outer periphery of the turning roller 6 so that the pocket b of the film a is caught in the circumferential direction by the pocket b. I have. Each locking recess 16
The opening dimension in the circumferential direction is larger than the outer dimension of the pocket b, and the pitch of the locking recesses 16 in the circumferential direction substantially matches the pitch of the pocket b when the film a is contracted.

In the vicinity of the turning roller 6, a constant torque electromagnetic brake for applying a braking force to the rotating shaft 21 by a magnetic force (corresponding to a brake which is a component of the present invention).
20 are provided. This constant torque electromagnetic brake 20
A braking gear 22 is fixed to the rotating shaft 21 so as to rotate integrally therewith. A braking force transmitting gear 23 is meshed with the braking gear 22, and the braking force transmitting gear 23 is Driven gear 24 fixed so as to rotate integrally
Are engaged.

A detector (corresponding to the detecting means which is a component of the present invention) 3 is located above the seal receiving roller 10.
0 is provided. The detector 30 has a horizontal support shaft 31.
Swinging body 32 provided with a detecting piece 33 protruding downward at the swinging end of the swinging body, an arm 34 swinging integrally with the swinging body 32, and an arm fixed to the support plate 36 And a sensor 35 for detecting the position of the tip of the sensor 34.

The lower end of the detection piece 33 of the rocking body 32 is in contact with the upper surface of the film a at a position where the film a starts to be wrapped around the seal receiving roller 10 immediately before both the sealing rollers 10 and 11.

The tip of the arm 34 is at a position where the sensor 35 does not detect when the film a is in close contact with the outer periphery of the seal receiving roller 10 immediately before both the sealing rollers 10 and 11, and the film a is not detected. Receiving roller 1 for seal
When it floats away from the outer periphery of 0, it swings to the position detected by the sensor 35.

When the detection by the sensor 35 is performed,
A detection signal for operating the constant torque electromagnetic brake 20 is output from the detector 30, and when the detection by the sensor 35 is stopped, the output of the detection signal from the detector 30 is stopped. I have.

Next, the operation of this embodiment will be described. During operation of the packaging device, the turning roller 6 is turned on as shown by the solid line in FIG.
In the above, the film a is hung around the turning roller 6 in a state in which each pocket b is loosely fitted in the locking recess 16, while the film a is wound around the fitting recess 12 in the sealing receiving roller 10. While the pockets b are sequentially aligned and securely fitted, the film a is wound around the seal receiving roller 10 in close contact with the outer periphery of the seal receiving roller 10 and passes between the seal pressing roller 11.

During this time, since the film a does not rise from the outer periphery of the sealing receiving roller 10,
Swinging body 32, detecting piece 33 and arm 34 do not swing,
No detection by the sensor 35 is performed.

When the operation of the packaging device is stopped, the transport of the film a is stopped, and the heated portion is left as it is, so that it shrinks as the temperature decreases, and the arrangement pitch in the transport direction of the pocket b becomes normal. , That is, smaller than the arrangement pitch of the fitting recess 12 of the receiving roller 10 for sealing.

Accordingly, in the sealing receiving roller 10, as shown by a chain line in FIG. 2, the pocket b is completely inserted into the fitting recess 12 at a position sandwiched between the sealing pressing roller 11. The pocket b, which is held in the fitted state and which corresponds to the fitting concave portion 12 on the near side of the position sandwiched between the sealing rollers 10 and 11, has its outer surface abutted on the opening edge of the fitting concave portion 12. When the film a comes out of the fitting recess 12, the film a rises up from the outer periphery of the seal receiving roller 10 at that portion.

As the film a rises,
The detection piece 33 and the arm 34 of the detector 30 abutting on the upper surface swing, the tip of the arm 34 is detected by the sensor 35, and a detection signal is output from the sensor 35,
The constant torque electromagnetic brake 20 operates according to the detection signal.

On the other hand, in the turning roller 6, the position of the pocket b loosely fitted in the locking recess 16 with respect to the locking recess 16 is maintained while the film a is wound around the outer circumference of the turning roller 6 closely. The pocket b, which is displaced from the position at the time of normal operation and loosely fits into the locking concave portion 16, is locked to the opening edge of the locking concave portion 16 as shown by a chain line in FIG. A state in which the hooking in the circumferential direction occurs is obtained.

Thereafter, when the operation of the packaging apparatus is resumed,
The film a is forcibly fed in a state where the film a is wrapped around the sealing receiving roller 10 by the rotational driving force of the sealing receiving roller 10 or other means.

Accordingly, the constant torque electromagnetic brake 2
The braking force of 0 is transmitted to the turning roller 6 via the rotating shaft 21, the braking gear 22, the braking force transmitting gear 23 and the driven gear 24, and the rotation of the turning roller 6 accompanying the transport of the film a is suppressed. You.

Due to the suppression of the rotation of the deflecting roller 6, the portion where the pocket b is hooked at the opening edge of the locking recess 16 of the deflecting roller 6 and the pocket b between the sealing rollers 10, 11 are fitted. The film a is conveyed while being stretched by receiving the pulling force between the portion fitted into the fitting recess 12.

When the film a is stretched, the arrangement pitch of the pockets b is changed to the sealing receiving roller 10.
And the pocket b is located just in front of both sealing rollers 10 and 11 in the fitting recess 1.
2, and the film a is inserted into the receiving roller 1 for sealing.
0 is in close contact with the outer periphery.

When the film a comes into close contact with the outer periphery of the seal receiving roller 10, the detection piece 33 of the detector 30 and the arm 3
4 oscillates in the direction opposite to the direction of contraction of the film a, the detection of the arm 34 by the sensor 35 is stopped, and the output of the detection signal is stopped.
0 is released, and the turning roller 6 is released from the state where the rotation is suppressed.

At this time, when the film a starts to rise again from the outer periphery of the sealing receiving roller 10 by contracting again,
The detection signal is output again from the detector 30, the constant torque electromagnetic brake 20 is operated, and the film a is stretched to be brought into close contact with the outer periphery of the sealing receiving roller 10.

Thus, the film a smoothly passes between the sealing receiving roller 10 and the sealing pressing roller 11, and is reliably sealed by the aluminum sheet c.

When the contracted portion of the film a has passed between the two sealing rollers 10 and 11, the passage between the two sealing rollers 10 and 11 is resumed. Since it is the portion where the pocket b is heated and formed later, the arrangement pitch of the pocket b matches the arrangement pitch of the fitting concave portion 12 of the receiving roller 10 for sealing, and even if the film a is not extended, The film "a" smoothly passes between the sealing rollers 10, 11 while the pocket "b" is securely fitted into the fitting recess 12, so that the sealing is reliably performed.

[0042]

As described in detail in the above embodiment, the packaging apparatus of the present invention is designed so that an operator can manually extend a film contracted while the operation is stopped when the operation is resumed. Rather than pulling the film, the pocket of the film is locked on the turning roller on which the film a is wound before passing between the two sealing rollers, thereby causing circumferential catching. At the same time, a method has been adopted in which rotation of the turning roller in the feed direction is suppressed by actuation of a brake.

Therefore, every time the operation is resumed, the worker does not need to go to the packaging device, which saves labor and saves the worker between the sealing rollers. It is possible to avoid the occurrence of accidents such as the above.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a film transport path.

FIG. 2 is a partially cut-away enlarged side view showing a mechanism for extending a contracted film.

[Explanation of symbols]

6: Turning roller 10: Seal receiving roller 11: Seal holding roller 12: Fitting recess 16: Locking recess
20: Constant torque electromagnetic brake (brake) 30: Detector (detection means) a: Film b: Pocket c: Aluminum sheet

Claims (1)

(57) [Claims] 1. A long-length synthetic resin film is fed in one direction while the film is heated and press-molded to form a pocket opening on one side of the film with a fixed pitch. After the film is formed, the film is wrapped around a turning roller so that the pocket is turned so as to be in a horizontal position in which the pocket is opened upward, and the object to be packaged is accommodated in the pocket. The film and a long aluminum sheet are sandwiched between the sealing receiving roller and the sealing pressing roller while the pocket is fitted in the fitting recess on the outer periphery of the sealing receiving roller by being wrapped around a roller. In the packaging device in which the opening of the pocket is closed by the aluminum sheet, the pocket is inserted into the outer periphery of the turning roller. The turning roller is provided with a locking concave portion for generating a hook in the circumferential direction, and the turning roller is provided with a brake for suppressing the rotation of the turning roller in the feed direction, and the film is immediately before being sandwiched between the two sealing rollers. And a detecting means for detecting that the seal roller has moved away from the outer periphery of the seal receiving roller and outputting a detection signal for operating the brake.