JPS6077841A - Method and device for adjusting position of lateral sealing and separation in endless-travelling tubular package - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary of the Invention] In order to determine the correct lateral sealing and separation position for a strip-like tubular bag package (p), a sensor (C) is used to determine the temporal position of the mark (M). The appearance is detected by impulse (ψFi). Lateral sealing and rotational angular position of separation member (D) (
ψMs)rtss is compared with the actual value of the standard * (M) as the desired value. The time difference is the impulse time difference (9M8-
ψFi), thereby obtaining the fault voltage for regulating the rotational speed (nF) of the tubular bag transport.

A disk blade motor can be used as the motor L2 for transporting the tubular bag. Therefore, a mechanical rotation speed adjuster can be omitted. Furthermore, changes in the shape and material of the bag as well as the performance of the device can be adjusted and varied quickly and easily.

[Technical field to which the invention pertains]

Unexploded Fil/ds This invention relates to a method for adjusting the lateral sealing and separation position of an endless tubular bag package according to the generic concept of claim 1, and an apparatus for carrying out the method according to claim 1. be.

[Prior art and its problems]

For example, for Swiss patent applications! In the case of tubular bag packages, such as those described in US Pat. No. 2,703,002, a film strip is fed through a folding device and a tube is formed from the film strip. This nayup is continuously fed with the articles to be packaged at uniform intervals. The filled tube is then divided into individual packages by transverse sealing seams, and the packages are separated, usually simultaneously with the sealing. According to this disclosure, in this way 300,1100 @
It is possible to produce packages up to

When printing on this film strip, care must of course be taken to ensure that the motifs are always evenly distributed. Particularly when using plastic films, the length of which changes significantly with changes in tensile stress, thus requiring precise adjustment of the sealing and separation positions.

From German patent application no. It is known. 1st
According to the device disclosed in the application, the length changes of the individual sections are quantified and the speed of the cutting means and/or the transport means is varied. A stepper motor is provided for this purpose, which acts on a differential to effect this change together with the mechanical start of the main motor. Similarly, according to the disclosure of the second application, the differential device is provided with a stepping motor, provided that the packaging has a defect and must be removed.

OBJECTS OF THE INVENTION It is therefore an object of the invention to continuously adjust the erroneous position of the marker relative to the cutting position.

[Key points of the invention]

According to the present invention, on the one hand, the point of passage of the sign is detected by a sensor, and at the same time, the rotation angle position is periodically detected by a motor, and the transport of the tubular bag package is controlled by the sensor and the motor. This is achieved by varying the evaluation of the signal.

An apparatus for carrying out this method includes a packaging member and a horizontal seal.
and the transport member of the tubular bag body is provided with another first motor between the transport member and the separation member and upstream of the sensor.

[Embodiments of the invention]

Hereinafter, the present invention will be described by way of example with reference to the accompanying drawings.

FIG. 1 shows triangular arrows, where black triangles indicate the flow of material and white squares indicate the flow of energy.

Additionally, open arrows indicate the flow of information. Energy supply is performed with N.

Tubular bag - Of the packaging device, the tubular bag packaging unit attendant, tubular bag transport member B, photoelectric sensor C, horizontal sealing, separation member, main motor E, first motor H, computer R, input and display. A member J is shown.

Important information is that the computer RK determines the device status, that is, the state of "stop" - "operation" - "manual" - "device stop", as well as freely selectable parameters from the input and display member J, as well as the film material 2 and the standard. @M angular position F
In addition to the data regarding i (FIG. 2), the data regarding the angular position Ms of the tubular bag P and the rotational speed n M i of the device
The information will be entered along with the relevant data. Here, the letters 5 and 5 respectively indicate whether this is an actual value or a desired value as an indication.

The second motor H has a required rotational speed nF from the computer R.
Get information about s. Electrical energy is supplied to motor E from both supply positions N, shown separately.

The transport member B is directly controlled by the sixth λ motor H, which energy is transmitted as mechanical energy by the main shaft to the tubular bag packaging part attendant and the lateral seal and separating member. The rotation speed is automatically kept constant. A disk blade motor can be used as the drive device for the first motor.

The information regarding the angular position g+Mi is the /rotation of the axis 1) 3
It is represented by tθ impulses.

These can be obtained by angle coziers or step impulse generators, or alternatively by inductive impulse generators.

A tachometer can be used to output the rotational speed information n M i and n F i. Equipment rotation speed n
To input M s, an electrometer can be provided to output an adjustable constant voltage.

The operating method will be explained with reference to FIG. At the top of the drawing a tubular bladder P is illustrated, which moves from right to left. The photoelectric sensor C and the lateral seals and separation members of the device are shown. The tubular pouch P shows a marker M and a motif or pattern F.

In the first row of FIG. 2, the impulses ψM6 from the lateral sealing and separating members are shown, here with variable spacing.

Impulse ψF+ in the second row is an impulse from sensor C and coincides with marker M in time. In the computer, the time difference S (ψMg - ψFi) of the two impulses is formed, a fault signal is formed by its integral value U = fs d t, and the desired rotational speed nFi for the transport element B is determined from it.

〔Effect of the invention〕

As is clear from the above, according to the present invention, all mechanical parts for changes in rotational speed can be eliminated, impulse control can be easily and quickly adjusted, and incorrect positioning of the mark relative to the cutting position can be avoided. Continuous adjustment becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the flow of information in an apparatus for implementing the method of the present invention, and a λ diagram is a schematic explanatory diagram of the present invention. A...Packaging member B...Transportation member C...Photoelectric sensor D...Separation member E...Motor F...Motif H...Motor J...Display member N...Energy Supply M... Label P... Bag body
R06, Computer 2...Film material patent applicant Schieb Schweitz Elisocie Industrie Gesellschaft

Claims (9)

[Claims] (1) Packaging member (A), horizontal sealing and separation member (D
) and a main motor (g) for driving the main motor (g) and a sensor (
C) In a method of adjusting the lateral sealing and separation position of an endless tubular bag package in a packaging device with a tubular bag equipped with
On the other hand, the sensor (C) detects the passing point of the mark R (M), and at the same time, the rotation angle position is periodically detected by the motor (E), and the feeding of the tubular bag package (P) is detected by the sensor (C). ) and the signal (ψF, ψM) from the motor (E). (2) A method according to claim 1, characterized in that the change in feed is effected by a second motor (B) for the tubular bag package. (3) To detect each rotation angle position of the motor (E),
Angular position (ψ
Claim 1g2 characterized in that M) is measured.
The method described in section. (4) The measured data, that is, the sensor signal (ψF), the rotation speed (nM), and the angular position (ψM) are transferred to the computer (R
), and input the sensor signal (ψF) and rotation angle position (ψM
4. The method according to claim 3, wherein the first motor (B) is controlled using a temporal change between . 5. A method according to claim 7, characterized in that a plurality of impulses are generated as rotational angular positions (ψM) per working cycle, thereby determining the accuracy of the desired position. (6) A blanking window for the sensor (C) is determined by the rotational angular position (ψM) so that the sensor is operated only within a predetermined range of the total length of the tubular bag body. The method described in section. (7) The axis is an axis that rotates in synchronization with the work cycle,
3. A method as claimed in claim 3, characterized in that a tachometer is connected to this shaft in order to obtain a signal for the rotational speed (n M ). (8) The method according to claim 7, characterized in that, in addition to the signal (ψM) for the rotational angular position, a signal (nM) for the rotational speed is also input into the computer (R). (9) Packaging member (A), horizontal sealing and separation member (D)
Claim 1, characterized in that the transport member (B) of the tubular bag body is provided with another second motor (H) upstream of the cut sensor (C) between the Apparatus for carrying out the method. (1ω Computer (R)K inputs information on the required data on the one hand and on the other hand the measured data regarding the angular position (ψF) and the number of rotations (n M ) in the transverse sealing and separation member (D) as well as the markings (M) Information regarding the appearance of @
is input, and the λ-th motor (H) is determined based on the detected time difference.
The device according to claim 1, characterized in that the rotational speed (n F ) of the device is changed.