JP3442376B2 - Apparatus for detecting interval between wrapping portions of continuous wrapping body and detection method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package interval detecting device for a continuous package for detecting the interval between package parts that enclose an object to be packaged, such as scent, powder or liquid soup, and a method for detecting the interval.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 14, there is known a wrapping portion interval detecting device for detecting an interval between a plurality of wrapping portions 1 ... Formed in a continuous wrapping body P. The continuous wrapping body P has the wrapping section 1 ...
So as to be partitioned and coupled with each other, transverse seals 2 such as heat seals, which are substantially orthogonal to the conveying direction α, are formed at required intervals, and the other side edge portion of the both side edge portions P ′, P ″ is formed. Along the P ″, a vertical seal 3 such as a heat seal
Are continuously formed. In the figure, reference sign W
Is a width that is substantially orthogonal to the transport direction α, and the symbol L is adjacent to 2
An interval between the two packaging parts 1 and 1 (hereinafter, also simply referred to as a packaging part interval) is shown.

The above-mentioned conventional package portion interval detecting device has two seal portion detecting rollers 4 which are swingable so as to sandwich the continuous package body P from both side surfaces Pa and Pb thereof with a required elastic force. , 4 and a sensor S1 for detecting the displacement of the seal portion detection rollers 4, 4 as main components, and the seal portion detection rollers 4, 4 serve as a packaging portion 1 for accommodating an object to be packaged. , By detecting the difference in the thickness of the horizontal seals 2, the position of each horizontal seal 2 ...
It is designed to detect and.

Apart from the above, FIG.
As shown in (B), the detection marks 5 ... Corresponding to the horizontal seals 2 ... that partition and connect the packaging portions 1 ... Are previously formed on the vertical seals 3 formed on the side edge portions P ″ of the continuous packaging body P. By printing and detecting the detection marks 5 ... With a photosensor 7 arranged on a pair of guide members 6 and 6 for guiding the vertical seal 3, the position of each horizontal seal 2 ... There has been proposed a packaging part interval detection device which detects the interval between the parts 1.

Further, the distance from each displacement sensor to one side surface of the continuous package P is measured by two displacement sensors (not shown) arranged on both sides of the continuous package P so as to face each other. Some have tried to detect the interval between the packaging parts by obtaining the difference between the distances detected by these two displacement sensors.

[0006]

However, as shown in FIG.
In the conventional apparatus shown in FIG. 1, since the continuous package P is conveyed while being elastically sandwiched by the pair of seal portion detection rollers 4 and 4, the objects to be packaged in the packaging portion 1 may be deformed by the elastic force. , The packaging material may be scratched or pinholes may be produced, which may lower the commercial value. Further, as a result of deforming the article to be packaged in the packaging unit 1, the thickness of the article to be packaged is reduced and a detection error is likely to occur.

Further, as the conveying speed of the continuous package P increases, the seal detecting rollers 4 and 4 bounce,
A phenomenon occurs in which the continuous package P is separated from both sides, which has the drawback that it is extremely difficult to detect the horizontal seals 2.

Further, in the conventional apparatus shown in FIGS. 15A and 15B, since the detection mark 5 is detected by the photosensor 7, each detection mark 5 ... Corresponds to the horizontal seal 2. In addition to the need to print on the vertical sticker 3, erroneous detection is likely to occur due to the attachment of dust and the like, and there is a design restriction due to the necessity of printing the detection marks 5.

Moreover, since the position of the horizontal seal 2 and the wrapping space are determined with the detection mark 5 as a reference, when the relative positional relationship between the detection mark 5 and the wrapping part 1 is not normal, advance detection is performed. Therefore, the continuous package P
The equipment for manufacturing the above must be provided with a device for keeping the relative positional relationship between the detection mark 5 and the horizontal seal 2 constant.

Further, in the method of measuring the distance from each displacement sensor to one surface of the continuous package P by the two displacement sensors which are arranged opposite to each other on both sides of the continuous package P, it goes without saying that It is necessary to prepare two expensive sensors, and moreover, in order to detect the thickness of the horizontal seal 2 and the packaging portion 1 without being affected by the position variation of the continuous package P, the characteristics of these sensors are the same. Since their mounting accuracy significantly affects the detection accuracy, their mounting adjustment is troublesome.

Therefore, the present invention is directed to the conveying speed of the continuous package,
Regardless of the type of packaging material and the presence or absence of printing, a continuous packaging body that can accurately detect the spacing between the packaging parts without causing deformation of the packaged material or scratches or pinholes in the packaging material. An object of the present invention is to provide a package interval detecting device and a detecting method therefor.

[0012]

To achieve the above object, the present invention has the following constitution. That is, the present invention is
While a continuous package formed by partitioning and forming a plurality of packaging parts by a lateral seal formed substantially orthogonal to a predetermined transport path is transported along the above-mentioned transport path, two adjacent packaging parts are adjacent to each other. In a packaging portion interval detection device for a continuous packaging body that detects the spacing of each packaging portion, a guide that abuts only one of the both side surfaces of the continuous packaging body and places the abutting portion in a tensioned state The means is arranged along the conveyance path, and the displacement detecting section for detecting the uneven displacement of one of the both side surfaces of the packaging section and the lateral seal in a non-contact manner is arranged opposite to the guiding means. It has been configured. With this configuration, the guiding means that is in contact with only one of the both side surfaces of the continuous package guides the contacting portion in a pulled state, and guides the packaging portion and the horizontal seal of the guiding means. Since the irregularity displacement of either one of the two side surfaces is detected by the displacement detection unit arranged facing the guide means in a non-contact manner, the transport speed of the continuous package, the type of packaging material and the presence or absence of printing Regardless of
Furthermore, the distance between the packaging parts can be accurately detected without causing deformation of the packaged object or damage or pinholes in the packaging material.

As the guiding means, a guide member having two flat guide surfaces intersecting with each other at a required angle is used, and the guide members are opposed to a ridge portion formed by intersecting the guide surfaces. By disposing the displacement detection unit, the interval between the packaging units can be detected more accurately with a simple structure. Also, as a guiding means,
By using a guide member having a guide surface having a required curvature and arranging the displacement detection unit facing the guide member, the interval between the packaging units can be more accurately configured with a simple structure. Can be detected.

In the above, the displacement detecting section is an optical type including a light source, a condenser lens and a light receiving sensor,
When the central axis of the projected light and the light receiving surface of the light receiving sensor are arranged in a conjugate relationship, the detection accuracy is less likely to be affected by the conveyance posture of the continuous conveyance body.

Further, a detection waveform corresponding to the uneven displacement of one of the both side surfaces of the packaging portion and the horizontal seal detected by the displacement detection portion and a comparison generated by shifting the detected waveform by a required phase Difference waveform generating means for generating a difference waveform corresponding to the difference between the for-use waveform and the adjacent 2
Change points of two difference waveforms are detected and detected 2
It is preferable to provide a space calculating means for calculating a space between two adjacent packaging parts based on one change point. In this case, it is preferable that the difference waveform generating means generates a pulse corresponding to the difference between the detected waveform and the comparison waveform as a difference waveform.

According to the method for detecting a gap between packaging portions of a continuous packaging body according to the present invention, a continuous packaging body formed by partitioning and coupling a plurality of packaging portions by lateral seals formed substantially orthogonal to a predetermined transport path is used. In a packaging part interval detection method for a continuous package, which detects an interval between every two adjacent packaging parts among the packaging parts while carrying along the carrying route, a guiding means arranged along the carrying route, By contacting one of the two side surfaces of the continuous package with the contacting portion in a pulled state, the guide portion is guided by the guiding means, and one of the both side surfaces of the packaging portion and the lateral seal is guided. The content of the non-contact detection of one of the concave and convex displacements is carried out by a displacement detecting portion arranged facing the guiding means.

In this case, it is generated by shifting the detection waveform corresponding to the uneven displacement of one of the both side surfaces of the wrapping portion and the lateral seal detected by the displacement detection portion and the detected waveform by a required phase. A difference waveform corresponding to the difference from the comparison waveform is generated, each change point of the adjacent difference waveforms is detected, and the interval between the two adjacent packaging parts is calculated based on the detected two change points. By doing so, it is possible to detect a more accurate gap between the packaging parts.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a pouch dispenser equipped with an embodiment of a package interval detecting device for a continuous package of the present invention, and FIG. 2 is an enlarged perspective view showing a schematic configuration of the above package interval detecting device. 4A is a schematic horizontal cross-sectional view of the wrapping part interval detection device, FIG. 4A is a schematic horizontal cross-sectional view when the continuous conveyance body is conveyed in a state of being displaced toward the displacement detection section side, and FIG. 5 is a schematic horizontal cross-sectional view when the sheet is conveyed while being displaced from the displacement detection unit side, FIG.
FIG. 3 is a block diagram showing the above-mentioned packaging section interval detection device and a control section provided with various function realizing means. Since the following continuous packaging body has the same structure as the above-mentioned continuous packaging body P, the same components as those described above are designated by the same reference numerals and the description thereof will be omitted.

A pouch dispenser 8 shown in FIG. 1 is provided with a feed unit 9, a package interval detecting device (hereinafter referred to as a detecting unit) A for a continuous package of the present invention, a cutter unit 10, a control box 12, and the like. The main body 13 is mounted on a pedestal 14. In addition,
Numerals 16 and 16 are fixed amount feed rollers.

As shown in FIG. 2, the detecting unit A comprises a guide mechanism 15 and a displacement detecting section B. Guide mechanism 1
Reference numeral 5 denotes a guide member 17 which is a guiding means, and a tension guide roller 1 arranged above and below the guide member 17.
It consists of 8 and 19. The guide member 17 is a continuous package P
Of the two side surfaces Pa and Pb of the continuous package P are abutted to one side surface Pa of the continuous package P to guide the contact portion. The guide surfaces 17a and 17b are bent and formed so as to form a front V shape having a required angle. The guide member 17 has a ridge line portion 17c formed at a portion where the guide surfaces 17a and 17b intersect with each other, and is substantially horizontal, and is arranged along a predetermined transport path Q.

The tension guide rollers 18 and 19 have a pair of guide collar portions 18a, 18a, 19a and 19 respectively.
a is projected on the shafts 18c and 19c at intervals substantially corresponding to the width W of the continuous package P, and the continuous package P is provided on both guide surfaces 17a and 17a of the guide member 17.
It is arranged so as to be in close contact with b. This prevents the continuous wrapping body P from shaking in the width W direction thereof, and also prevents the continuous wrapping body P from rising or undulating from the guide surfaces 17a and 17b. That is, one side surface P of the continuous package P
The a is always in close contact with the guide surfaces 17a and 17b and is slid on the guide surfaces 17a and 17b in a tensioned state.

The displacement detector B, as shown in FIGS.
The light source 20, the condenser lens 21, and the light receiving sensor 22 are provided, and these are arranged so that they are not affected by the inclination of the continuous package P and the like, and the light receiving surface 22a of the light receiving sensor 22 and the light source 2
They are arranged in a conjugate relationship with the central axis O of the projected light generated from zero.

Specifically, the light source 20, the condenser lens 21, and the light receiving sensor 22 are composed of the ridge line portion 17 of the guide member 17.
It is arranged on a horizontal plane including c and is arranged so that the bright spot on the central axis O of the projection light generated from the light source 20 forms an image on the light receiving surface 22a of the light receiving sensor 22. By arranging the light receiving surface 22a and the central axis O of the projected light in a conjugate relationship as described above, it is possible to always detect the unevenness displacement satisfactorily regardless of the conveyance posture, the inclination, and the like of the continuous package P. I am trying.

In the present embodiment, the light receiving sensor 22 employs a PSD (Position Sensitive Device) and can obtain a voltage according to the light receiving position of the light ray R incident on the light receiving surface 22a thereof. is there. That is, the continuous package P is output when the continuous package P is displaced to the proximity position (b) close to the light receiving sensor 22 as shown in FIG. 4 (A) with reference to the reference position (a) shown in FIG. When the voltage rises and as shown in (B) of the figure, it moves to the separated position (C) separated from the light receiving sensor 22,
The output voltage is decreasing.

As the light receiving sensor, a CCD (Charge Coupled Device) other than the above PSD can be adopted. In this case, the video signal output from the CCD is converted into a voltage according to the light receiving position. By providing a conversion circuit for the CC, the CC
An output voltage according to the position of the light ray R incident on D can be obtained.

The concavo-convex displacement signal detected by the displacement detector B is input to the controller C.

The control unit C has a CPU (central
processing unit), which functions as a control center of the entire pouch dispenser 8 and also has a detection waveform reading means C1 and a binarized waveform generating means C described below.
2, filtering means C3, difference waveform generation means C4,
It has a function as an interval calculation means C5 and a correction means C6.

The detection waveform reading means C1 has a function of reading the shape data of the continuous package P at a predetermined reading timing for one unit of conveyance. Specifically, the side surfaces 1b ..., 2b ... of the packaging unit 1 ... and the lateral seal 2 ...
The uneven displacement data of is read.

The binarized waveform generating means C2 has a function of generating a binarized pulse from the detected waveform output from the light receiving sensor 22 based on a preset threshold value.

The filtering means C3 has a function of filtering the detected waveforms to remove high frequency components contained therein.

The differential waveform generating means C4 requires a detection waveform corresponding to the uneven displacement of one of the both side surfaces of the packaging unit 1 and the lateral seal 2 detected by the displacement detection unit B, and this detection waveform. The difference waveform corresponding to the difference from the comparison waveform generated by shifting the phase of is generated.

The interval calculating means C5 detects the change points of two adjacent difference waveforms among the plurality of difference waveforms, and determines the two adjacent change points based on the detected two change points.
The distance between the two packaging parts, in other words, the distance L between the packaging parts is calculated.

The compensating means C6 is for compensating so that the error of the above-mentioned change point becomes small. For example, the compensation based on the interval L between the front and rear packaging parts 1 and 1, which will be described later, and the compensation based on comparison with product information. , And correction based on the model shape can be adopted. Note that the flatness before the candidate point and the rate of change (slope) after the candidate point can be used for compensation.

Next, the operation of detecting the packaging unit 1 and the lateral seal 2 and the operation of calculating the spacing between the packaging units will be described with reference to FIGS. 6 (A) to 6 (E) are operation diagrams showing a state in which the packaging portion and the horizontal seal slide on the guide member, FIG. 7 (A).
Is the detection waveform output from the light receiving sensor of the displacement detector,
(B) is a rectangular pulse generated based on a predetermined threshold,
FIG. 8C is a waveform diagram showing a filtered detection waveform, a comparison waveform having a phase difference from this, and a rectangular pulse that is a difference waveform generated from them. FIG. 8A is a filtered detection waveform. FIG. 9 is a waveform diagram showing a rectangular pulse that is a differential waveform generated from them and a comparative waveform that has a phase difference; FIG. 9B is a waveform diagram in which the differential pulse is compensated based on the model waveform. Is a flowchart showing the operation of the control unit C that reads the detected waveform output from the displacement detection unit as digital data and performs binarization and high frequency (high frequency) component removal processing. FIG.
5 is a flowchart showing a calculation operation of a packaging part interval in FIG. 7 and 8, the vertical axis represents the output voltage and the horizontal axis represents the transport distance.

<Detection Operation of Packaging Unit 1 and Horizontal Seal 2> Step a1 (simply referred to as a1 in FIG. 9; the same applies hereinafter): It is determined whether or not it is the read timing for a predetermined unit of conveyance, and at the read timing. If so, step a2
Proceed to.

Step a2: Read the shape data of the continuous package P. That is, in the present embodiment, the unevenness displacement data of the side faces 1b ..., 2b ... Of the packaging unit 1 ... The unevenness displacement data is waveform data output from the light receiving sensor 22 as follows. Figure 6
As shown in (A), of the two adjacent packaging portions 1, 1, the packaging portion 1 on the front side in the transport direction is the ridge line portion 1 of the guide member 17.
When passing through 7c, the side surface 1b at the rear end of the packaging unit 1 starts to approach the ridge line portion 17c of the guide member 17,
Therefore, it is also displaced away from the light receiving sensor 22. According to the displacement, from the light receiving sensor 22,
Detection waveform D1 which has fallen as indicated by D1 ″ in (A)
Is output.

Then, as shown in FIGS. 6B to 6D, when the lateral seal 2 approaches the ridge portion 17c, one side surface 2a of the lateral seal 2 is kept in sliding contact with the ridge portion 17c. Then, a substantially flat detection waveform as shown by D3 in FIG. 7A is output. That is, the horizontal seal 2 can be detected at a constant transport position, in other words, at a constant transport position that is close to or not separated from the light receiving sensor 22, regardless of the transport posture of the continuous package P.

Further, when the continuous wrapping body P is conveyed, as shown in FIG. 6 (E), the horizontal seal 2 starts to separate from the ridge portion 17c, and the conveying direction of the two adjacent wrapping portions 1, 1 is increased. The packaging unit 1 on the rear side starts approaching the ridge line portion 17c. In accordance with this, from the light receiving sensor 22, FIG.
The detection waveform D2 that rises as indicated by the symbol D2 'in FIG.

Then, as in the case of the detection waveform D1, when the packaging portion 1 on the rear side in the conveying direction has finished passing the ridge line portion 17c of the guide member 17, the side surface 1b at the rear end portion of the packaging portion 1 is The ridge 17c of the guide member 17 starts to approach, and therefore, the guide member 17 is also displaced so as to be separated from the light receiving sensor 22. In accordance with the displacement, the detection waveform D falling from the light receiving sensor 22 as indicated by D2 ″ in FIG.
2 is output.

When the horizontal seal 2 approaches the ridge line portion 17c, one side surface 2a of the horizontal seal 2 is moved to the ridge line portion 17c.
The state of being slidably contacted with is retained, and a substantially flat detection waveform as indicated by D4 is continuously detected, followed by detection waveform D3.
Similarly to the above, the rising detection waveform D5 indicated by the reference sign D5 '
Is output. In this manner, the light receiving sensor 22 outputs the waveform indicated by the symbol D in FIG. 7A as the continuous package P is conveyed.

Step a3: As shown in FIG.
A pulse F obtained by binarizing the detection waveforms D1 to D5 output from the light receiving sensor 22 based on a preset threshold E.
1 to F5 are generated. The packaging unit 1 and the horizontal seal 2 can be roughly classified by these pulses F1 to F5.

Step a4: By filtering the detected waveforms D1 to D5, high frequency components contained therein are removed.

Step a5: It is judged whether or not the reading is finished. If the reading is not finished, the process returns to step a1 to continue the reading process, and if it is finished, the reading process is finished.

<Processing for Calculating Package Interval> Step b1: Detecting a changing point by the floating threshold method, in this embodiment, a rising edge is detected. As shown in FIG. 7C, the detection waveforms D1 to D5 read in the steps a1 to a5 are read out and the detection waveforms D1 to D5 are read.
Comparison waveforms G1 to G5 obtained by shifting the waveform obtained by filtering D5 in step a4 by a required phase.
To generate the detection waveforms D1 to D5 and the comparison waveform G1.
The difference from G5 is calculated, and rectangular pulses H1 to H7, which are difference waveforms, are generated according to whether the difference is positive or negative.

Step b2: Pulses F1 to F5 generated in steps a1 to a5 and difference waveforms H1 to H7
A change point (rise) candidate is selected by comparing with. That is, the change points (rises) existing in the area determined to be the horizontal seal 2 are found by the pulses F1 to F5 generated in the above steps a1 to a5, and the one that is closest to the packaging unit 1 among them is found. The first candidate and the second candidate are set in order. In FIG. 7C, the left side horizontal seal 2 has the first candidate H2 ′ and the second candidate H6 ′, and the right side horizontal seal 2 has the first candidate H2 ′.
5'and second candidate H7 '.

Step b3: It is judged whether or not the packaging interval is within the allowable range. If it is within the allowable range, the process proceeds to step b4, and if it is out of the range, the process proceeds to step b11. After performing the predetermined processing, the detection processing ends.

Step b4: A true change point (rise) is selected from the candidates of change point (rise). Specifically, in the order from the first candidate to the second candidate, the one in which the error of the packaging interval is within the allowable range is selected. Figure 7
In (C), the second candidate H is displayed on the left side horizontal seal 2.
6 ′ is selected, and on the right side horizontal seal 2, the first candidate H5 ′
Select.

Step b5: Two adjacent packaging parts 1,
Determine if it is necessary to perform a 1 interval correction,
If it is necessary, the process proceeds to step b6, and if it is not necessary, the process proceeds to step b7.

Step b6: Two adjacent packaging parts 1,
Correction based on the interval of 1 is performed. That is, two adjacent
The candidate points H6 'and H5' are adjusted so as to reduce the error based on the interval between the two packaging parts 1 and 1. In this case, 2
The condition is that the total length of the one wrapping portion 1, 1 is about twice the average length of the wrapping portion 1, and the limit of the compensation amount must be taken into consideration.

Step b7: If the correction based on the product information is necessary, proceed to step b8, and if not, proceed to step b9. Step b8: Correction is performed according to the product information. Based on the product information such as the length, width, and packaging thickness of the packaging unit 1 and the thickness of the horizontal seal 2, which are stored in advance in the memory (not shown) of the control unit C, the difference between them is reduced. The candidate points H6 'and H5' are corrected.

Step b9: It is judged whether or not the correction based on the model waveform is necessary, and if it is necessary, the process proceeds to step b10, and if not, the detection processing is ended. Step b10: Perform correction based on the model waveform. As shown in FIG. 8 (A), the detection waveforms D6 to D8 and the comparison waveforms G6 to G having a phase difference from the detection waveforms D6 to G8.
8 are generated, and pulses H8 and H9 are generated from these differences. In the memory (not shown) of the control unit C, FIG.
As shown in (B), a model waveform I centering on a reference change point (rising edge) is stored in advance, and the candidate is selected according to the correlation between the model waveform I and the candidate point (rising edge) H9 '. The point H9 'is corrected. By the above-mentioned respective adjustments, it becomes possible to detect the interval between the adjacent packaging parts 1 and 1 more accurately.

Next, another example of the guiding means will be described with reference to FIG.
This will be described with reference to 12. The guide member 24 which is the guiding means shown in FIG. 11 is a front arcuate plate body which is provided with a guide surface 24a having a required curvature and which is formed by inserting a light transmitting hole 25 in the center of the guide surface 24a. is there.

On the back side of the guide surface 24a, a displacement detecting section B'having the same structure as that described above is arranged, and a continuous package which slides on the guide surface 24a through the light transmitting hole 25. The unevenness displacement of one side surface 1a, 2a of the P packaging unit 1 and the lateral seal 2 is detected. In FIG. 11, the displacement detector B ′ is arranged so as to match the radius of curvature of the guide surface 24a, but it may be appropriately arranged at a position outside the radius of curvature.

When the shape data of the continuous package P guided by the guide member 24 is read, it becomes as follows. That is, in the present embodiment, the uneven displacement of each one side surface 1a ..., 2a ... Of the packaging portion 1 ... and the lateral seal 2 ... Is detected. As shown in FIG. 12 (A), when the packaging portion 1 of the packaging portions 1, 1 on the front side in the transport direction has finished passing through the light transmission hole 25, one side surface 1a of the rear end portion of the packaging portion 1, The guide member 24 starts to move away from the guide surface 24a, and thus also moves away from the light receiving sensor 22 (not shown). According to the displacement, from the light receiving sensor 22,
13, the falling detection waveform D9 is output as indicated by the reference numeral D9 ″. At this time, the continuous packaging body P is brought into contact with the guide member 24, so that the continuous packaging body P is in a required tension state. , Horizontal seal 2 for light receiving sensor 22
The conveyance is performed in a state in which the proximity displacement and the separation displacement are prevented.

When the horizontal seal 2 approaches the light transmission hole 25, one side surface 2a of the horizontal seal 2 is detected, and a substantially flat detection waveform D10 is output.

Further, when the continuous package P is conveyed, as shown in FIG. 12 (E), the horizontal seal 2 moves to the guide surface 24a.
Of the two adjacent packaging portions 1, 1 and the packaging portion 1 on the rear side in the transport direction starts approaching the light transmission hole 25. In accordance with this, from the light receiving sensor 22, FIG.
A detection waveform D11 having a rising edge indicated by D11 'is output. In this way, the detection waveform as shown in FIG. 13 is output from the light receiving sensor 22 as the continuous package P is conveyed.

The present invention is not limited to the above-described embodiment, but various modifications can be made within the scope of the gist thereof. In the above description, the guide member formed on the plate is illustrated, but the guide member has a circular cross section with a required curvature and an elliptical shape, and its peripheral speed is synchronized with the transport speed of the continuous package, or slightly different. It may be constituted by a roller that rotates at a different speed.

In the above description, an optical sensor is used as an example of the displacement detecting sensor, but the sensor is not limited to the optical sensor as long as it can detect the uneven displacement of the continuous carrier without contact.

[0059]

According to the invention described in claims 1 to 8, the abutting portion is guided in a tensioned state by the guiding means abutting on one of both side surfaces of the continuous package, Since the irregularity displacement of one of the both sides of the wrapping portion and the lateral seal guided by the guiding means is detected in a non-contact manner by the displacement detecting portion arranged facing the guiding means, the continuous wrapping body It is possible to accurately detect the intervals between the packaging parts regardless of the transport speed of the packaging material, the type of packaging material and the presence or absence of printing, and further, without causing deformation of the packaged object or scratches or pinholes on the packaging material. it can.

In addition to the common effects obtained by the inventions described in claims 1 to 8, according to the invention described in each claim, the following effects can be obtained. According to the invention of claim 2, the guiding means is formed by a guide member having two flat guide surfaces that intersect each other at a required angle, and the guide line is formed on the ridge portion formed by the intersecting guide surfaces. Since the displacement detectors are arranged so as to face each other, it is possible to accurately detect the intervals between the packaging parts with a simple configuration. Further, the horizontal seal can be detected more accurately by sliding the horizontal seal on the ridge portion.

According to the invention described in claim 3, since the guiding means is constituted by the guide member having the guide surface having the required curvature, each of the guiding means is constituted by a simple structure as in the invention described in claim 2. It is possible to accurately detect the interval between the packaging parts.

According to the fourth aspect of the present invention, the displacement detecting section is composed of the light source, the condenser lens and the light receiving sensor, and the central axis of the projected light and the light receiving surface of the light receiving sensor have a conjugate relationship. Since they are arranged, the influence of the inclination of the continuous conveyance body can be eliminated.

According to the invention described in claim 5, a detection waveform corresponding to the uneven displacement of the side surface of the packaging part and the lateral seal detected by the displacement detection part and a comparison generated by shifting this detection waveform by a required phase Difference waveform generation means for generating a difference waveform corresponding to the difference between the difference waveform and the change waveforms of the adjacent difference waveforms are detected, and based on the detected two change points, the two adjacent packaging parts. Since the space calculating means for calculating the space is provided, the space between the packaging parts can be accurately calculated.

[Brief description of drawings]

FIG. 1 is a front view of a pouch dispenser equipped with an embodiment of a package interval detecting device for a continuous package of the present invention.

FIG. 2 is an enlarged perspective view showing a schematic configuration of the above-mentioned packaging portion interval detection device.

FIG. 3 is a schematic horizontal sectional view of a displacement detector.

FIG. 4A is a schematic horizontal cross-sectional view when the continuous conveyance body is conveyed in a state where the continuous conveyance body is displaced closer to the displacement detection unit side, and FIG. 4B is a state where the continuous conveyance body is displaced away from the displacement detection unit side. It is a schematic horizontal sectional view at the time of being conveyed.

FIG. 5 is a block diagram showing the above-mentioned packaging section interval detection device and a control section provided with various function realizing means.

6A to 6E are operation diagrams showing a state in which the packaging unit and the lateral seal slide on the guide member.

7A is an output waveform output from a light receiving sensor of a displacement detection unit, FIG. 7B is a rectangular pulse generated based on a predetermined threshold value, and FIG. 7C is an output waveform having a phase difference after filtering. FIG. 7 is a waveform diagram showing the generated comparison waveform and the rectangular pulse generated from them.

FIG. 8A is a waveform diagram showing an output waveform, a comparison waveform having a phase difference after filtering, and a rectangular pulse generated from them; FIG. 8B is a waveform correction based on a model waveform. It is a waveform diagram of a state.

FIG. 9 is a flowchart showing an operation of reading a detected waveform output from the displacement detector.

FIG. 10 is a flowchart showing an operation of calculating a packaging portion interval.

FIG. 11 is a front view showing another example of the guiding means.

12A to 12E are operation diagrams showing a state in which the packaging unit and the lateral seal slide on the guide member.

FIG. 13 is an output waveform output from the light receiving sensor of the displacement detector.

FIG. 14 is an enlarged perspective view showing a schematic configuration of a conventional packaging portion interval detection device.

FIG. 15 is a diagram showing a configuration of a continuous package for explaining a package interval detecting device according to another conventional example, (A)
Is a side view and (B) is a front view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Packaging part 2 Horizontal seals 17 and 24 Guide members 17a and 17b which are guiding means 17c Guide surface 17c Ridge line part 20 Light source 21 Condensing lens 22 Light receiving sensor 22a Light receiving surface A Detection unit B which is a package interval detecting device of a continuous package. , B'Displacement detection section C1 Differential waveform generation means C2 Interval calculation means D Detected waveform F Differential waveform G Comparison waveforms H2 ', H6' Change points H5 ', H7' Change points L Packaging space O Center axis P of projected light Continuous package Pa Pa One side of continuous package Pb Other side of continuous package Q Conveyance path

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-301607 (JP, A) JP-A-6-56133 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B 11/00-11/30 B65B 57/00-57/20

Claims (8)

(57) [Claims] 1. A continuous package formed by partitioning and arranging a plurality of wrapping sections by a lateral seal formed substantially orthogonal to a predetermined transporting path while being transported along the above-mentioned transporting path. In a package interval detecting device for a continuous package, which detects the interval between two adjacent package parts, the continuous package is brought into contact with only one of both side surfaces of the continuous package, and the contact portion is pulled. The guide means for guiding the guide is disposed along the transport path, and the displacement detector for non-contactly detecting the uneven displacement of one of the both side surfaces of the packaging portion and the lateral seal is the guide means. A device for detecting a gap between packaging parts of a continuous package, the device being arranged so as to face the package. 2. The guide means is a guide member having two flat guide surfaces which intersect each other at a required angle.
2. The package interval detecting device for a continuous package according to claim 1, wherein the displacement detecting section is arranged so as to face a ridge line section formed by intersecting the guide surfaces. 3. The guide means is a guide member having a guide surface having a required curvature, and the displacement detecting section is arranged facing the guide member. Interval detection device for continuous packaging. 4. The displacement detecting section is an optical type comprising a light source, a condenser lens and a light receiving sensor, and the central axis of the projected light and the light receiving surface of the light receiving sensor are arranged in a conjugate relationship. The wrapping space detecting device for a continuous wrapping body according to claim 1, 2, or 3. 5. A detection waveform corresponding to the uneven displacement of one of the both sides of the packaging unit and the lateral seal detected by the displacement detection unit, and a comparison generated by shifting the detection waveform by a required phase. Difference waveform generating means for generating a difference waveform corresponding to the difference from the waveform for use, and change points of the two adjacent difference waveforms are detected, and two adjacent packages are based on the detected two change points. An interval calculating means for calculating an interval between parts is provided.
2. A device for detecting a gap between packaging parts of a continuous package according to 2, 3, or 4. 6. The differential waveform generating means, as the differential waveform,
6. The package interval detecting device for a continuous package according to claim 5, wherein a pulse corresponding to a difference between the detected waveform and the comparison waveform is generated. 7. A continuous package formed by partitioning and arranging a plurality of wrapping sections by a lateral seal formed substantially orthogonal to a predetermined conveying path while conveying the wrapping sections along the conveying path. In a method for detecting a gap between packaging parts of a continuous package, which detects a gap between every two adjacent packaging parts, a guiding means arranged along the above-mentioned transport path is applied to only one of both side surfaces of the continuous package. By bringing them into contact with each other, the abutting portion is pulled and guided, and the uneven displacement of either one of the both sides of the packaging portion and the lateral seal, which is guided by the guiding means, is made to face the guiding means. A method for detecting a gap between packaging parts of a continuous packaging body, which is characterized in that it is detected by a displacement detection part arranged in a non-contact manner. 8. A detection waveform corresponding to the uneven displacement of one of the both side surfaces of the packaging unit and the lateral seal detected by the displacement detection unit, and a comparison generated by shifting the detection waveform by a required phase. The difference waveform corresponding to the difference with the working waveform is generated, each change point of the adjacent difference waveforms is detected, and the two adjacent points are detected based on the detected two change points.
The method for detecting a gap between packaging parts of a continuous package according to claim 7, wherein the distance between two packaging parts is calculated.