JPH10181970A - Packing material delivery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store an unsealing tape of fixed length stably by an unsealing tape (packing material) storage unit. SOLUTION: Between an unsealing tape reel 21 and a delivery roller, an unsealing tape storage unit 22, including fixed rollers 27, a tension lever 25 capable of swiveling with a support point 25a at the center to be energized in one direction, and tension rollers 26 provided in this tension lever 25, is provided. The unsealing tape reel 21 is driven to rotate by a drive motor 24, an unsealing tape 4 is fed out and red to a delivery roller after wound between the fixed roller 27 and the tension roller 26. The tension lever 25 gives fixed tension to the unsealing tape 4. A position of the tension lever 25 is detected by a position detection sensor 42, based on the detected position of the tension lever 25, by controlling the drive motor 24, the position of the tension lever 25 is corrected to a predetermined reference position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging operation in which an endless wrapping material (wrapping material) such as a film or tape is wound around a wrapping material reel, and the wrapping material sent out from the wrapping material reel is wrapped by a feeding roller. More particularly, the present invention relates to a packaging material feeding device provided with a packaging material storage unit for constantly storing a packaging material of a fixed length between a packaging material reel and a feeding roller.

[0002]

2. Description of the Related Art FIG. 6 is a schematic diagram showing an outline of a conventional packaging material feeding device of this type. As shown in FIG. 1, a conventional packaging material feeding device includes a packaging material reel 101 and a feeding roller 1.
02 and a packaging material storage unit 103. An endless wrapping material 100 is wound on the wrapping material reel 101 in advance, and the wrapping material 100 is sent out by rotating the wrapping material reel 101 with the rotational driving force of a reel drive motor 104. Feeding roller 10
Reference numeral 2 denotes a pair of a driving-side feeding roller 102a and a driven-side feeding roller 102b.
0 is fed to a predetermined packaging operation position.

The packaging material storage unit 103 includes a fixed roller 106 supported by the apparatus main body, and a tension lever 108 which is swingable about a support shaft 108a and is urged in one direction by an urging member 107 such as a spring. And a tension roller 109 supported by the tension lever 108. The tension roller 109 is provided at an intermediate position between the packaging material reel 101 and the feeding roller 102.

The packaging material 1 sent out from the packaging material reel 101
00 is the fixed roller 1 in the packaging material storage unit 103.
After being wound in a zigzag manner between the tension roller 106 and the tension roller 109, it is guided to the feeding roller 102.
The packaging material storage unit 103 applies a constant tension to the packaging material 100 wound between the fixed roller 106 and the tension roller 109 by the urging force of the tension lever 108. Packaging material 10
0 is stored without loosening between the packaging material reel 101 and the feeding roller 102.

[0005] The packaging material storage unit 103 functions as a buffer when the packaging material reel 101 is switched to a new packaging material reel 101 when the amount of the packaging material 100 wound around the packaging material reel 101 decreases. . In other words, during the switching operation of the packaging material reel 101, the packaging material 100 wound between the fixed roller 106 and the tension roller 109 is supplied to the feeding roller 102, so that the packaging material reel 101 is not interrupted. Is realized.

The packaging material storage unit 103 also functions as a buffer in a case where the stop of the packaging material reel 101 and the stop of the feeding roller 102 are not synchronized with each other in an emergency stop of the apparatus. That is, when the feeding roller 102 stops after the packaging material reel 101 during an emergency stop of the apparatus, the packaging material 10 stored in the packaging material storage unit 103 is
0 to the feeding roller 102 side, the packaging material 10
0 can be prevented from being cut. Meanwhile, packaging material reel 1
When 01 stops after the feeding roller 102,
The packaging material 100 sent from the packaging material reel 101 can be stored in the packaging material storage unit 103 without being loosened.

[0007]

Now, in the above-described packaging material feeding device, the packaging material 100 by the packaging material reel 101 is used.
Of the packaging material 10 by the feeding roller 102
It is necessary to make it equal to the feeding length of 0. However, as the winding diameter of the packaging material 100 wound on the packaging material reel 101 decreases, the packaging material sending length from the packaging material reel 101 becomes It changes.

For this reason, the packaging material 1 by the packaging material reel 101
00 and the feeding length of the packaging material by the feeding roller 102 do not match, and as a result, the storage length of the packaging material 100 in the packaging material storage unit 103 gradually changes,
The function as the buffer described above cannot be performed,
Alternatively, the sent packaging material 100 is
There was a risk that the rocking of 08 could not be absorbed completely.

Therefore, conventionally, a brake 110 is provided so as to be able to freely contact and separate from a support shaft 101a of the packaging material reel 101, and the brake 110 is manually operated by an operator, so that the Change the rotation speed,
The length of the packaging material 100 stored by the packaging material storage unit 103 has been adjusted. However, in the rotation speed adjustment of the packaging material reel 101 by the brake 110 as described above, the load acting on the reel drive motor 104 becomes excessive, and the motor 1
In addition to shortening the life of the 04, there is a drawback that the position of the tension lever 108 fluctuates due to the manual adjustment of the operator and cannot be performed with high precision.

In order to solve such a drawback, the present applicant has arranged a sensor such as an ultrasonic sensor in the vicinity of the outer peripheral surface of a packaging reel according to a patent application disclosed in Japanese Patent Application Laid-Open No. Hei 5-270711. The sensor detects the winding diameter of the packaging material reel and adjusts the rotation speed of the reel drive motor based on the winding diameter of the packaging material so that the length of the packaging material sent from the packaging reel is kept constant. We have proposed a web feeding device.

However, in a configuration in which the winding diameter of the packaging material reel is directly detected by a sensor as in the web feeding device disclosed in the publication, the swing of the support shaft of the rotating packaging material reel and the packaging material reel are not considered. There is a possibility that the sensor may not be able to accurately detect the winding diameter of the packaging material due to the influence of irregularities on the surface of the packaging material wound on the surface, waving, or the like, and the stability is lacking. The present invention
The present invention has been made in view of the above circumstances, and has an object to enable a packaging material storage unit to stably store a packaging material having a fixed length.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a packaging reel for winding a packaging material, a reel driving motor for rotating the packaging reel, and a reel which is fed from the packaging reel. A feeding roller for feeding the packaged material to the packaging work position, and a feeding motor for rotating the feeding roller. A fixed roller and a fulcrum are pivotable between the packaging material reel and the feeding roller. A tension lever urged in one direction, and a packaging material storage unit including a tension roller provided on the tension lever is provided, and the packaging material sent from the packaging material reel is
A packaging material feeding device that winds between a fixed roller and a tension roller and feeds the feeding material to the feeding roller, and applies a constant tension to the packaging material by a tension lever, is provided with the following configuration.

That is, the packaging material feeding device of the present invention comprises:
Position detecting means for detecting the position of the tension lever, and control means for controlling the reel drive motor based on the position of the tension lever detected by the means and correcting the position of the tension lever to a predetermined reference position. .

According to the present invention having the above-described structure, a predetermined reference position is set in advance for the swing position of the tension lever, and the tension lever is automatically adjusted so as to always be located at the reference position. If the tension lever is maintained at a predetermined reference position, the packaging material wound between the tension roller and the fixed roller provided on the tension lever always maintains a fixed length and is generated inside. The tension is constant and there is no risk of loosening or breakage.

As described above, the present invention automatically adjusts the storage length of the packaging material between the packaging material reel and the feeding roller by focusing on the position of the tension lever which directly affects the storage length of the packaging material. It is possible to automatically adjust the storage length of the packaging material stably without being affected by the swing of the spindle of the packaging material reel, the unevenness of the surface of the packaging material wound on the packaging material reel, or the waving. Become.

Further, by appropriately changing the reference position of the tension lever, the storage length of the packaging material between the packaging reel and the feeding roller can be arbitrarily changed, and the variable operating conditions required by the user can be satisfied. It can respond flexibly. In this specification, packaging materials (packaging materials)
Contains various endless packaging supply materials wound around a reel. For example, the packaging material is not limited to a packaging film for packaging an article, and an opening tape (opening tape) fused to the packaging film is also included in the packaging material. In this case, the packaging material reel may be referred to as an opening tape reel.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an entire structure of a packaging material feeding device according to an embodiment of the present invention. The packaging material feeding device shown in FIG. 1 includes first and second packaging film supply units 2 and 3 for supplying an endless packaging film (packaging material) 1 used for packaging a product, and a melting device for the packaging film 1. There are provided first and second opening tape supply units 5 and 6 for supplying an endless opening tape (wrapping material) 4 to be attached.

The first and second packaging film supply units 2 and 3
Either one is a preliminary supply unit, for example, the first
When the wrapping film is being sent from the wrapping film supply unit 2, the second wrapping film supply unit 3 serves as a preliminary supply unit, and the wrapping film reel 7 of the first wrapping film supply unit 2
When the packaging film 1 wound around is exhausted, the delivery of the packaging film 1 from the second packaging film supply unit 3 is subsequently started.

A feeding roller 8 is provided downstream of the supply path of the packaging film 1 sent from the first and second packaging film supply units 2 and 3. Each of the first and second packaging film supply units 2 and 3 has the same structure, and includes a packaging film reel (packaging material reel) 7 and a packaging film storage unit (packaging material storage unit) 9.

The endless wrapping film 1 is wound around a wrapping film reel 7 and is attached to and detached from the rotary drive shaft 11 integrally with the wrapping film reel 7. The rotation drive shaft 11 is driven to rotate by a reel drive motor 10. In this embodiment, a servo motor is used as the reel drive motor 10 to enable high-precision rotation speed control. Then, the packaging film reel 7 mounted on the rotary drive shaft 11
Feeds out the wound and wound packaging film 1 by the rotation driving force of the reel drive motor 10.

The packaging film storage unit 9 is provided on a supply path of the packaging film 1 sent out from the packaging film reel 7, and includes a tension lever 12 and a tension roller 1 attached to the tension lever.
3, and a fixed roller 14 attached to the apparatus main body. The tension lever 12 is swingable about a support shaft 12a, and is constantly urged in one direction (clockwise in the drawing) by an urging means 15 such as a spring.

The packaging film 1 sent out from the packaging film reel 7 is wound around the tension roller 13 and the fixed roller 14 in a zigzag manner, and then guided to the feeding roller 8. Here, the packaging film 1 wound between the tension roller 13 and the fixed roller 14
Is pulled by a constant tension by the urging force acting on the tension lever 12 to prevent slack.

The feed roller 8 comprises a pair of drive-side feed rollers 8a and driven-side feed rollers 8b, and the drive-side feed rollers 8a are rotated by receiving the rotational driving force of the feed motor 16. A servo motor is used as the feeding motor 16 to enable high-precision rotation speed control.
Then, the packaging film 1 sent out from either one of the packaging film supply units 2 or 3 is gripped by the delivery roller 8 and is delivered to a packaging operation position of a packaging device (not shown).

A wrapping film connection roller 17 is provided between the wrapping film storage unit 9 and the feeding roller 8, and a wrapping film cutting cutter 18 is provided near the upstream side of the wrapping film connection roller 17. . Further, an end detection sensor 19 for the packaging film 1 is provided near the packaging film reel 7 in each of the packaging film supply units 2 and 3. These components have an automatic connection function of the packaging film 1.

That is, when the end detecting sensor 19 detects the end of the wrapping film 1 in one of the wrapping film supply units (hereinafter referred to as used wrapping film supply unit) 2 or 3 which is executing the feeding of the wrapping film 1. It is determined that the packaging film 1 is no longer in the packaging film reel 7 of the packaging film supply unit 2 or 3, and the other packaging film supply unit (hereinafter, referred to as a preliminary packaging film supply unit) 3 which has been the preliminary supply unit Alternatively, the reel drive motor 10 in 2 rotates to start feeding the packaging film 1.

As a result, the packaging film 1 sent from the preliminary packaging film supply unit 3 or 2 is gripped by the packaging film connection roller 17, and the packaging film 1 sent from the used packaging film supply unit 2 or 3. And heat fusion. Subsequently, the wrapping film cutting cutter 18 is operated to cut the rest of the wrapping film 1 sent from the used wrapping film supply unit 2 or 3.

The first and second opening tape supply units 5 and 6 have the same configuration as the first and second packaging film supply units 2 and 3 described above. That is, one of the first and second opening tape supply units 5 and 6 is also a preliminary supply unit.
When the opening tape 4 wound around the opening tape reel 21 of the first opening tape supply section 5 runs out, the second opening tape supply section 6 becomes a preliminary supply section. Delivery of the opening tape 4 from the tape supply unit 6 is started.

The first and second opening tape supply sections 5 and 6 have the same structure, and include an opening tape reel (wrapping material reel) 21 and an opening tape storage unit (packaging material storage unit) 22. . The endless opening tape 4 is wound around an opening tape reel 21 and is attached to and detached from the rotation drive shaft 23 integrally with the reel 21. The rotation drive shaft 23 is
It is rotationally driven by a reel drive motor 24. In this embodiment, a servo motor is used as the reel drive motor 24, which enables high-accuracy rotation speed control. Then, the unsealing tape reel 21 mounted on the rotary drive shaft 23 sends out the wound unsealing tape 4 rotated by the rotation driving force of the reel drive motor 24.

The opening tape storage unit 22 is provided on a supply path of the opening tape 4 sent out from the opening tape reel 21, and includes a tension lever 25 and a tension roller 2 attached to the tension lever 25.
6, and a fixed roller 27 mounted on the apparatus main body.

The tension lever 25 is swingable about a support shaft 25a, and is provided with biasing means 28 such as a spring.
Is constantly urged in one direction (clockwise in the figure). The unsealing tape 4 sent out from the unsealing tape reel 21 is wound around the tension roller 26 and the fixed roller 27 in a zigzag manner, and is pulled by a constant tension by the urging force acting on the tension lever 25 to prevent slack. You.

A heater unit 29 is provided downstream of the supply path of the opening tape 4 sent out from the first or second opening tape supply section 5 or 6. The opening tape 4 is heat-sealed at a predetermined position of the packaging film 1 by the heater unit 29, and is sent to the feeding roller 8 integrally with the packaging film 1.

An opening tape connection roller 30 is provided between the opening tape storage unit 22 and the heater unit 29, and an opening tape cutting cutter 31 is provided near the upstream side of the opening tape connection roller 30. . Further, near the opening tape reel 21 in each of the opening tape supply sections 5 and 6, an end detection sensor 32 of the opening tape 4 is provided.
Is provided. These components have an automatic connection function of the opening tape 4.

That is, when the end detection sensor 32 detects the end of the opening tape 4 in one of the opening tape supply units (hereinafter referred to as used opening tape supply unit) 5 or 6 which is executing the feeding of the opening tape 4. It is determined that the unsealing tape 4 has run out of the unsealing tape reel 21 of the unsealing tape supply unit 5 or 6, and the other unsealing tape supply unit (hereinafter, referred to as a pre-opening tape supply unit) 6 that has been the preliminary supply unit is used. Alternatively, the reel drive motor 24 in 5 rotates to start feeding the opening tape 4.

As a result, the opening tape 4 sent from the preliminary opening tape supply section 6 or 5 is gripped by the opening tape connection roller 30, and the used opening tape supply section 5 is used.
Or, it is polymerized with the opening tape 4 sent out from 6 and heat-sealed. Subsequently, the opening tape cutting cutter 31 operates to cut off the remaining opening tape 4 sent from the used opening tape supply unit 5 or 6.

In the above-described packaging material feeding device, the packaging film storage unit 9 is provided with the tension lever 12.
There is provided a position detecting means for detecting the position. Similarly, the opening tape storage unit 22 is provided with a position detecting means for detecting the position of the tension lever 25-. In this embodiment, the packaging film storage unit 9
A rotary encoder 41 is connected to the tension lever 12 as position detection means, and the rotary encoder 41 detects the position of the tension lever 12. On the other hand, the opening tape storage unit 2
For the second tension lever 25, an analog position detection sensor 42 is provided as position detection means.

Although the rotary encoder 41 and the position detecting sensor 42 output the detection result as a digital signal or an analog signal, the rotary encoder 41 and the position detection sensor 42 have an essential function in detecting the positions of the tension levers 12 and 25. There is no difference. Therefore, the following description will be mainly directed to the opening tape storage unit 22 using the analog position detection sensor 42 as the position detecting means.

FIG. 2 is an enlarged front view showing the structure of the first and second opening tape supply units. With reference to the figure, the position detection sensor 42 provided in each of the opening tape supply units 5 and 6 and the members related thereto will be described in more detail. The support shaft 25a of the tension lever 25 A roller 43 that rotates integrally is provided. A cam plate 44 that is rotatable about a support shaft 44a is provided at an intermediate portion between the roller 43 and the position detection sensor 42. The cam plate 44 is always in contact with the roller 43 by an urging member 45 such as a spring, and the support shaft 44a corresponds to the movement of the roller 43 due to the swing of the tension lever 25.
Around the center.

Then, a part of the side surface of the cam plate 44 (sensing surface).
Reference numeral 44b faces the position detection sensor 42, and the position detection sensor 42 detects an interval with the sensing surface 44b.
That is, the position of the tension lever 25 is replaced by the distance between the position detection sensor 42 and the sensing surface 44b of the cam plate 44, and the position is detected by the position detection sensor 42.

The position detecting sensor 42 detects the swing position of the tension lever 25. In the packaging material feeding device according to the present invention, the tension lever 25 is always positioned at a predetermined reference position by controlling the rotation speed of the reel drive motor 24 as described later. Therefore, the opening tape storage unit 2
The length of the opening tape 4 stored in 2 is adjusted to the length when the tension lever 25 is located at the reference position.
By changing the reference position of the tension lever 25 arbitrarily, the length of the opening tape 4 to be stored in the opening tape storage unit 22 and the tension acting on the opening tape can be adjusted.

FIG. 3 is a block diagram showing a control system of the reel drive motor based on the position of the tension lever detected by the above-mentioned position detection sensor. Position detection sensor 42
Is output as an analog signal, it is first converted into a digital signal by the A / D converter 46 and is converted into a digital signal by a programmable logic controller (hereinafter, referred to as P).
LC). The PLC 47 controls the feeding motor 16 in synchronization with the packaging operation of the packaging device, and based on the detection signal input from the position detection sensor 42 via the A / D converter 46, the reel drive motor 24
Control.

FIG. 4 is a flowchart showing the rotation control operation of the reel drive motor by the PLC. PLC47
Samples the detection signal from the position detection sensor 42 indicating the position X of the tension lever 25 at regular intervals T (S1, S2). Then, the length Lt (tape adjustment length) of the opening tape 4 to be adjusted to return the tension lever 25 to the reference position Xo is calculated by the following equation (S3). Lt = (X−Xo) × Xk (1)

Here, Xk is the opening tape storage unit 2
2, a conversion coefficient for converting the position of the tension lever 25 into the storage length of the opening tape 4, and the position X of the tension lever 25 detected by the position detection sensor 42.
By multiplying this by the conversion coefficient Xk, the storage length of the opening tape 4 at the time of sampling can be calculated. The conversion coefficient Xk is obtained in advance by an experiment.

Subsequently, the length (feed length) Lf of the unsealing tape 4 fed during the sampling period T is obtained from the rotation speed Vf of the feed motor 16 (S4). Lf = Vf × Rf × T (2) where Rf is the diameter of the feeding roller 8. JP 5
In the web feeding device disclosed in Japanese Patent Publication No. 270711, the web per cycle (corresponding to an opening tape)
A work of inputting the feeding length from a keyboard or the like was required. On the other hand, in the present embodiment, as described above, the rotation speed Vf
Since the feeding length Lf of the unsealing tape 4 is automatically obtained, the input operation can be reduced.

Next, the feeding length L 'of the opening tape 4 and the winding diameter R' of the opening tape reel 21 calculated at the time of the previous sampling, and the opening tape actually fed from the previous sampling to the current sampling. The winding diameter R of the unsealing tape reel 21 at the time of the current sampling is calculated from the length L ″ of 4 (S6). L ″ = L′−Lt (3) R = R ′ × (L ″ / L ′) ( 4) When the reel drive motor 24 is stopped at the time of the previous sampling and started at the time of the current sampling,
The step of calculating the winding diameter R of the unsealing tape reel 21 is not performed, and the process proceeds to the next step (S5 → S7). In this case, the winding diameter R of the unsealing tape reel 21 uses data obtained at the time of sampling immediately before the reel drive motor 24 stops.

The length (tape feed length) L of the unsealing tape 4 to be sent out from the unsealing tape reel 21 in order to return the tension lever 25 to the reference position is calculated by the following equation (1) or (2). It is calculated by substituting the tape adjustment length Lt and the feeding length Lf obtained as described above (S7). L = Lt + Lf (5)

The rotation speed V of the reel drive motor 24 required to return the tension lever 25 to the reference position
Is calculated by substituting the winding diameter R and the tape feeding length L of the unsealing tape reel 21 obtained by the above equations (4) and (5) into the following equation (S8). V = (L / Rπ) / T (6)

By controlling the reel drive motor 24 based on the rotation speed V calculated in this manner, (S
9) The tension lever 25 is adjusted to the reference position, and as a result, the storage length of the opening tape 4 in the opening tape storage unit 22 can be maintained at a constant length. The above control operation is repeated for each sampling cycle until the packaging operation of the packaging device stops (S10). Further, the winding diameter R of the unsealing tape reel 21 obtained at each sampling,
The tape feeding length L, the feeding length Lf, and the tape adjusting length Lt are stored in the memory 48 shown in FIG. 3 for use in the arithmetic processing at the next sampling.

FIG. 5 is a flowchart showing the operation for obtaining the winding diameter R of the opening tape reel when the opening tape reel is replaced. That is, in order to determine the winding diameter R of the opening tape reel 21 by the above procedure, as shown in Expression (4), the sending length L 'of the opening tape 4 and the winding diameter of the opening tape reel 21 calculated at the previous sampling. R ′ and the length L ″ of the unsealing tape 4 actually sent from the previous sampling to the current sampling.
Data is needed. However, when the data from the previous sampling is used when the opening tape reel 21 is replaced, since the data is greatly different, the correct rotation speed V of the reel drive motor 24 cannot be calculated, and there is a risk that the tension lever 25 may cause hunting. is there.

Therefore, when replacing the opening tape reel 21, as shown in FIG. 5, the reel driving motor 24 is first rotated in the reverse direction to tension the opening tape 4 stored in the opening tape storage unit 22 (S21). ), it is detected by the position detecting sensor 42 the position X ₁ of the tension lever 25 in this state (S22). Subsequently, the reel drive motor 24 is one revolution forward (S23), detects the position X ₂ of the tension lever 25 at this time is a position detecting sensor 42 (S24).

The tension lever 2 detected as described above
From the position X _1, X ₂ of 5, and calculates the tape feed length L ₁₂ between the tear tape reel 21 is rotated once (S2
5). L ₁₂ = (X ₂ −X ₁ ) × Xk (i) Then, the winding diameter R of the unsealing tape reel 21 is calculated from the following equation (S26), and this winding diameter R is substituted into the above equation (6).
The number of rotations V of the reel drive motor 24 required to return the tension lever 25 to the reference position is obtained. R = L ₁₂ / π (ii)

Although the above description has been directed to the opening tape storage unit 22 using the analog position detection sensor 42 as position detection means, the packaging film storage unit 9 using the rotary encoder 41 as position detection means is also applicable. By sampling the position of the tension lever 12 detected by the rotary encoder 41 by the PLC 47 at regular intervals T, the winding diameter of the packaging film reel 7 (the winding diameter R of the unsealing tape reel 21) is obtained in the procedure shown in FIG.
), The length of the packaging film 1 to be sent out from the packaging film reel 7 (corresponding to the tape sending length L) can be calculated, and the rotation speed V of the reel drive motor 10 can be obtained.

In general, the packaging material feeding section of the packaging device
As shown in FIG. 1, an elevating roller for storing a packaging material called a dancer roller 50 is provided downstream of the feed roller 8, and the original feed roller 51 is provided downstream of the dancer roller 50. It has become. But,
In the present invention, a roller downstream of the unit that affects the length of the packaging material stored in the packaging material storage unit (see FIG. 1)
, A roller denoted by reference numeral 8 and sometimes referred to as a preliminary feeding roller) is referred to as a feeding roller.

[0053]

As described above, according to the present invention, a predetermined reference position is set in advance with respect to the position of the tension lever, and control is performed so that the tension lever is always located at the reference position. The material storage unit can stably store the packaging material of a fixed length.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an overall structure of a packaging material feeding device according to an embodiment of the present invention.

FIG. 2 is an enlarged front view showing a configuration of first and second opening tape supply units.

FIG. 3 is a block diagram showing a control system of a reel drive motor based on a position of a tension lever detected by a position detection sensor.

FIG. 4 is a flowchart illustrating a rotation control operation of a reel drive motor by a PLC.

FIG. 5 is a flowchart showing an operation for obtaining the winding diameter of the opening tape reel when replacing the opening tape reel.

FIG. 6 is a configuration diagram showing a conventional packaging material feeding device.

[Explanation of symbols]

 1: packaging film 2: first packaging film supply section 3: second packaging film supply section 4: opening tape 5: first opening tape supply section 6: second opening tape supply section 7: packaging film reel 8: feeding roller 9 : Packaging film storage unit 10: Reel drive motor 11: Rotary drive shaft 12: Tension lever 13: Tension roller 14: Fixed roller 15: Urging means 16: Feeding motor 17: Packaging film connection roller 18: Packaging film cutting cutter 19 : End detection sensor 21: Opening tape reel 22: Opening tape storage unit 23: Rotating drive shaft 24: Reel drive motor 25: Tension lever 26: Tension roller 27: Fixed roller 28: Urging means 29: Heater unit 30: Opening tape Connection roller 31: Opening tape cutting cutter 32: End detection sensor 41: rotary encoder 42: position sensor 43: roller 44: cam plate 45: the biasing member 46: A / D converter 47: PLC 48: Memory

Claims (1)

[Claims] 1. A packaging reel for winding a packaging material, a reel drive motor for rotating the packaging reel, a feeding roller for feeding the packaging material sent from the packaging reel to a packaging operation position, A delivery motor that rotationally drives the delivery roller, and between the packaging material reel and the delivery roller, a fixed roller, a tension lever that is swingable around a fulcrum and urged in one direction, A packaging material storage unit including a tension roller provided on the tension lever is provided, and the packaging material sent out from the packaging material reel is wound between the fixed roller and the tension roller and sent to the feeding roller, In a packaging material feeding device for applying a constant tension to the packaging material by the tension lever, a position detection for detecting a position of the tension lever Means for controlling the reel drive motor based on the position of the tension lever detected by the means, and control means for correcting the position of the tension lever to a predetermined reference position. apparatus.