JPS63258726A - Sizing mechanism of packer - 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] <Industrial Application Field> The present invention is directed to transporting a box-shaped product wrapped with wrapping paper onto a transfer path while moving the ends of the package m that protrude from both ends of the product along the end surface of the product. Gluing of a packaging device for folding and applying glue to the inner surface of a flap is related to a mechanism, and more specifically, to a device that transports the product at a non-uniform speed using a pusher.

<Prior art> Conventionally, the gluing mechanism of this type of packaging device was
As disclosed in Japanese Patent No. 9-7202, the pusher and the main shaft of the drive motor that operates the pusher are connected via a cam mechanism, and the intermittent return movement of the pusher is driven in a non-uniform manner, more specifically, in a sine wave. , to make it possible to smoothly transport products and to stop them accurately in a fixed position, and for example,
As disclosed in Japanese Patent Application No. 4887, a pair of glue pots for storing size liquid are arranged on the left and right at the end of the transfer path, and the glue pots are installed in these pots so that they can be raised and lowered. By adhering the size liquid and projecting it onto the size pot, it comes into contact with the inner surface of the flap to apply the size liquid.

<Problems to be Solved by the Invention> However, in the gluing mechanism of such conventional packaging devices, the size of the glue pot increases in proportion to the length of the flap, making it heavy and difficult to handle, and the size of the glue pot also increases. The size liquid easily spills out and adheres to surrounding parts, or it is difficult to manage the level of the size liquid or replenish the size liquid, and furthermore, the surface to which the glue is applied is limited to the width and length of the board. It is not easy to change or adjust the coating layer.

Therefore, in order to solve the problems of the above-mentioned glue pot method, it is conceivable to apply glue to the flap during transportation using a gun.

On the other hand, if glue is applied over the entire length of the flap in the width direction, the glue will spill out and get dirty when the flap is folded in, so it is desirable to apply glue to both ends of the flap in the width direction. Since the flap is pushed by the pusher and moves at an inconstant speed, it is very difficult to control the injection timing of the gun when applying glue.Furthermore, the size of the wrapping paper or box-shaped product may change, and the drive motor that operates the pusher may need to be adjusted. There is a problem in that when the rotational speed is changed, the injection timing must be readjusted each time, which is troublesome.

In view of the conventional situation, the present invention aims to apply glue to appropriate width portions of both ends of the flap, which is transferred at a non-uniform speed, using a gun.

<Means for Solving the Problems> Technical means taken by the present invention to solve the above problems include a rotation speed detection means for detecting the rotation speed per unit time of the main shaft of the drive motor that operates the pusher. A gluing gun is placed at a predetermined position on the transfer path and injects glue toward the flap in response to a signal input, and a gluing gun is placed upstream of this gun in the transfer direction when the end of the flap starts and ends passing. A sensor for detecting η, a dimension input means for inputting the external shape and usage of wrapping paper and box-shaped products, and a means for inputting the above-mentioned rotational speed and external dimensions, which are calculated when the sensor detects the end of passing, and after an appropriate period of time, the gluing gun is operated. The present invention is characterized in that it includes a delay time determining means which sends a start signal and also calculates when the end of passing is detected and sends a gluing operation stop signal to the gun after an appropriate time.

Effect> The effect of the present invention is that when the sensor detects the front end in the transfer direction of the flap that is transferred in a non-uniform manner, the delay time determining means receives the rotation speed per unit time of the main shaft from the rotation speed detection means and the rotation speed per unit time of the main shaft from the dimension input means. By reading and calculating the outer dimensions of the wrapping paper and the box-shaped product, and starting the operation of the glue gun, the spraying of glue is started at an appropriate time lag and when a predetermined interval is heard from the front end of the flap. When the sensor finishes detecting the rear end in the transport direction, the delay time determining means reads and calculates the rotational speed of the main shaft and the external dimensions of the wrapping paper and box-shaped product, and the gluing is performed as appropriate by stopping the gun in two operations. Glue injection is stopped at a predetermined interval before the rear end of the time delay flap.

<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.

In this embodiment, as shown in FIG. 1, I14 gluing and flap gluing are controlled by one control means.

The transfer path (1) has a wrapping opening (1a) at its starting end, and a wrapping paper storage section (2) is provided on the side of the wrapping opening (1a), from which the wrapping paper ( A) is fed one by one to the bottom of the packaging opening (1a) using the feeding belt (3), and a product accommodating section (4) is provided behind the packaging opening (1a), and from this product accommodating section (4), a box-shaped Product (b) - individual packaging opening (
1a) The wrapping paper (a) fed below is fed further downward.

Thereafter, when the product (b) is lifted up by an elevator (5) disposed under the packaging opening (1a) so that it can descend freely, the wrapping paper <, a
The wrapping paper (
a) Fold the ends to the side and create upper and lower flaps (a+ Ha+)
(az) (az) and further lower flap (az)
When (az) is folded upward and transferred to near the end of the transfer path (1), only the upper flap (at) (at) protrudes horizontally.

In addition, the wrapping paper accommodating section (2) is provided with a manually adjustable guide (2a) corresponding to the left and right length dimension (A) of the wrapping paper (a).
), and guides (4a) that can be manually adjusted in accordance with the left-right length and front-back width W of the box-shaped product (b) are provided in the product storage section (4), and both guides ( 2a) (4
The above dimension A is determined by reading the current right position of a) with a guide position detector (7) such as a potentiometer or rotary encoder.

Detect L and W.

In this embodiment, potentiometers that are synchronized with the movement of both guides (2a) and (4a) are arranged, and each potentiometer converts the resistance value corresponding to the movement into a voltage and outputs it, and further converts this output voltage into an A/ By inputting it into a D converter, converting it into a digital value, and then transmitting it to the input interface (12a) of the control circuit (12), which speeds up the conversion.
The left-right length dimension A1 of the wrapping paper (a), the left-right length dimension and the front-rear width dimension W of the box-shaped product (b) are automatically detected.

Further, the feeding belt (3) is connected to its drive pulley (3).
a) is connected to the main shaft (not shown) of the drive motor via a transmission means, and the rotation of the main shaft causes the packaging device a to be fed at a constant speed, and the pusher (6) is connected to the drive motor 1@ through a transmission means and a cam mechanism, and is caused to reciprocate intermittently at a non-uniform speed by the rotation of the main shaft, thereby moving the product (b) pushed by this pusher (6〉). By changing the speed, for example, in a modified sinusoidal manner, the product (b) moves along the transfer path (
1) When it reaches the end, the speed is O and it stops accurately at a fixed position.

The drive motor that operates these feed belts (3) and pushers (6) is of a conventionally known type, and rotates its main shaft at a constant howl. The number of revolutions per hour n is measured using a rotation angle detector (8
).

In this embodiment, a rotary encoder is rotatably installed in synchronization with the rotation of the spindle, and the number of pulses corresponding to the rotation angle of the spindle is sent to an input interface (12a) of a control circuit (12) to be described later. The rotation per unit time an is calculated.

On the other hand, the packaging device a (a) moves from the wrapping paper accommodating section (2) to below the packaging opening (1a) at the downward position of the passage and the product (b).
The upper flap (at) (a) of the wrapping paper (a) covered with
t) moves along the transfer path (1). Gluing guns (9a), (9b), and (9b
) respectively.

That is, the gluing gun (9a) is placed at a position where it applies glue to the inner surface of the negative side edge of the wrapping paper (a) in order to adhere the body part of the wrapping paper (a), and the gluing gun (9b) ) and 'U (9b)
4. upper and lower flaps (at ) (at > and (a
2) Place the folded surface of (a2) in position for gluing on the inner surface of the end side of its upper flap (at) (at).

For each gluing process, install the guns (9a), (9b), and (9b) with their respective injection nozzles facing upward, and connect them in series via the distribution vibrator (9c) (9c). Connect the glue container (9C) to the gun (9a) via the supply vibrator (9d).

The glue container (90) stores, for example, a vinyl acetate-based emulsion glue, specifically a glue (C) whose main component is vinyl acetate/ethylene copolymer, vinyl acetate/acrylic copolymer, acrylic copolymer, etc. .

The supply vibrator (9d) is equipped with a pump (9f), a filter (9()), and a pressure switch (9h), and the pump (9r) pressurizes the glue (C) in the glue container (9e). Gluing is supplied to guns (9a) (9h) (9b).

In addition, each glue gun (9a), (9b), and (9b) have a passage that supplies the glue from the inlet to the injection nozzle. l1 (Wl) is provided, and the valve mechanism is connected to the electromagnetic valve (10a) (10b) (10b).
By operating the opening and closing operation using driving air supplied from
) Spray on the inner surface of the end side.

Furthermore, the cylinder gluing is carried out on the upstream side of the wrapping paper (a) transport direction of the gun (9a) when the leading end of the wrapping paper (a) moves through the wrapping paper transport path and when the end of the wrapping paper (a) ends passing. A sensor (11a) is installed to detect the flap gluing, and a gun (9
There is a transfer path (1) on the upstream side in the transfer direction of product (b) of bH9b).
A large number of sensors (11b) (11b) are installed to detect when the front end of the upper flap (at) moving the upper flap (at) begins to pass and when the rear end of the upper flap (at) (at) ends passing. Sensor (11a) (11b) (11
Send the detection signal from b) to the input interface (12a) of the control circuit (12), which will be described later! By doing so, the spraying and stopping of the guns (9a), (9b), and (9b) are controlled for each gluing operation. .

The configuration of the control circuit (12) will be explained according to FIG.
Input interface (12, 8) and CPU (12b
+), RAM (12bz) and ROM (12bz)
bz ) consisting of a microcomputer (12b
) and an output interface (12c).

The input interface (12a) outputs the dimension signal from the guide position detector (7) to the CPU (12b+), the angle signal from the rotation angle detector (8), or the input interface (12a). (11b) (llb)
Select whether to output a passing start/stop signal from.

The ROM (12b3) contains a program to control the CPU (12b+), a numerical table showing the relationship between the moving position l of the modified sine wave-driven pusher and the corresponding rotation angle of the main shaft, and the gluing gun and the program that drives it.゛Correction value α1, which is calculated by combining the electrical feed time, glue flight time, etc. of the response time of the electromagnetic valve. α2. β1゜β2. β3. β4. β5
．． β6 is loaded, and CP Ll (12b+) connects to the input interface (12a) according to this program.
Importing more necessary external data or RA
It performs arithmetic processing while exchanging data with M (12b2), and outputs the processed data to the output interface (12c) as necessary.

The output interface (12C) is the CPU (12b
Each glue gun (9a) receives the output signal from
) (9b) (9b) respectively connected to the electromagnetic valve (10a
) (10b) (10b) to open and close these valves (10a), (10b), and (10b). Make it open and close.

The program stored in the ROM (12b3) is shown in flowcharts t7-1 through t7-1 as shown in FIG. 4, and the operation will be explained according to FIG.

In the case of body gluing, when the program is started, the microcomputer (12b) first applies an angle signal to the input interface (12a), calculates and reads the number of rotations per unit time n (rpm) of the main shaft.

After that, the wrapping paper detection sensor (11a) detects when the leading edge of the wrapping paper (a) starts passing and turns ON, and when the input interface (12a) inputs this passing start signal, the microcomputer (12b) The delay time U (Ills) until the start is calculated by the formula 1752.6 - α1, and after this time U, the solenoid valve (10a) for body gluing is opened, and a signal is heard at a predetermined interval from the tip of the wrapping paper (a). At a later point in time, the gluing starts spraying the glue (C) from the gun (9a).

In this state, the wrapping paper detection sensor (11a) detects the wrapping paper (a
) It detects the end of passing of the end and turns OFF, and when this passing end signal is input to the input interface (12a), the gluing is stopped after a delay time D (ms) After 0 hours, the solenoid valve ( 10a) to close the wrapping paper (a>
Gluing stops spraying the glue (C) from the gun (9a) at a predetermined interval before the end.

In the case of flap gluing, when the program starts, the microcomputer (12b) gives an angle signal to the input interface (12a), calculates and reads the rotation speed n (rpg+) of the main shaft per unit time, and gives a dimension signal. Left and right length dimension A (am) of wrapping paper (a),
Read the left and right length dimension W (#11) and the front and back width dimension of the box-shaped product (b).

After that, the flap detection sensor (11b) detects when the front end of the upper flap (at) starts passing and turns on. When the input ink face (12a) receives this passing start signal, the microcomputer (
12b) first calculates the detection start position P1 of the upper flap (a+) (a+) corresponding to the size of the wrapping paper (a> and the box-shaped product (b)) using the formula 2W-A4L +β1, and then Gluing of a,)(a+) is at the starting position P
2 is expressed using the formula 2w-A+L-β2.

Next, the relationship between the modified sine wave driving position of the pusher written in the ROM (12b3) and the rotation angle of the main shaft is shown in the numerical table below. Find θ2.

θ P θ P θ P , (JtJ l Then, the extension time U (n+s) until the start of gluing is 5
Calculated using the formula 00 θ1-θ2)-β3, n Solenoid valve for G with flap glue after this U time (iob)
(10b) is opened and the upper flap (at) (at
) At the point after opening a predetermined distance from the front edge, use a gun (9) to apply the glue.
Start spraying the glue (C) from bH9b).

In this state, the flap detection sensor (11bH11b) detects the end of passage of the rear end of the upper flap (at) and turns OFF.When this passage end signal is input to the input interface (12a), first the wrapping paper ( The upper flap (a) corresponds to the size of the box-shaped product (b).
t) (at) detection end position P3 = +β4
In addition to calculating the upper flap (at > (
For gluing at), the end position P4 is determined by *W according to the formula Δ:''--β5.

Next, from the numerical table written in the ROM (12b3), P3. The rotation angle θ1°02 of the main shaft corresponding to P4 is determined, and the delay time D (ms) until the gluing stops is set to 50° (
Calculated by the formula θ -04-β6, n
10b) and close the upper flap (at) (at
) Gluing at a predetermined distance from the rear end (Bustard (9b)
Stop spraying the glue (C) from (9b).

In addition, in this embodiment, since the rotation angle detector (8) can always detect the rotation angle of the main shaft corresponding to the moving position of the wrapping paper (a) and the upper flap (at), and top flap (at) (at)
is supplied to each sensor (11a) (11b) without any abnormality.
(11b), and store it in the microcomputer (12b), and compare this stored normal angle range with the actual angle range, the wrapping device t (a) and top flap (a)
t) (at) Movement accidents can be detected, and in the event of an abnormality, the glue (C) injection of each glue gun (9a), (9b), and (9b) will be stopped, or the abnormal front thread will be removed using the CRT. Can be done.

In addition, in the front claw embodiment, flap glue (busard (9b)
) (9b) is placed near the end of the transfer path (1) in the F direction and glue (C) is applied to the lower surface of the horizontally protruding upper flap (al). Without limitation, when folding the end of the wrapping paper (a), the upper flap (
Fold up the (at) (at) vertically and apply glue (C
) The gluing gun (9b) (9b) may be placed to the side so as to apply the paste.

In addition, the current position of the guides (2a) and (4a), which are adjusted according to the external dimensions of the wrapping paper (a) and the box-shaped product (b), can be read using a guide position detector (7) such as a potentiometer. Although the dimensions A, L, and W are detected by this method, the dimensions A, L, and W are not limited to this, and for example, the dimensions A, L, and W may be input directly into the microcomputer (12b) using a keypad, and furthermore, a rotation angle detector such as a rotary encoder may be used. In (8), the angle of the spindle was detected and the rotation speed n per unit time of the spindle was detected, but it goes without saying that this is not limiting and any method may be used as long as it can detect the rotation speed n. stomach.

<Effect of the invention> Since the present invention has the above configuration, it has the following advantages.

■When the sensor detects the curved end in the transfer direction of the flap that is transferred at an inconstant speed, the delay time determining means receives the number of rotations per unit time of the main shaft from the rotation speed detection means and the number of rotations per unit time of the main shaft from the X1 method input means. By reading and calculating the external dimensions of each product and starting the operation of the glue gun, the spraying of glue is started after a predetermined interval from the front end of the flap after an appropriate delay, and the rear end of the flap in the transfer direction is started. When the sensor finishes detecting, the delay time determining means reads and calculates the rotational speed of the spindle and the external dimensions of the wrapping paper and box-shaped product, and stops the operation of the glue (=l) gun to determine the rear end of the flap with an appropriate time delay. Glue injection is stopped at a predetermined interval before the start, so you can simply enter this again each time the external dimensions of the wrapping paper or box-shaped product change, and even if the spindle's rotation speed changes, the flap will not Glue can be applied to both ends in the width direction as appropriate, and the glue does not come out and cause stains when the flap is folded in, unlike conventional products.

■Since a gun is used for gluing, it eliminates the problems of the conventional gluing pot method, makes it easier to manage the gluing liquid, improves work efficiency, and downsizes the device. By controlling the injection nozzle and the transport speed of the wrapping paper, the surface to which the glue is applied can be easily changed and adjusted.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an overview of the gluing mechanism of a packaging device according to an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a circuit diagram of the control circuit, and Fig. 4 is a flowchart. be. In addition, in the figure a...Wrapping paper al, al...Flap b.
...Box-shaped product 1...Transfer path 6...Pusher 7...Dimension input means 8...Rotation speed detection means 9b, 9b...Glued [Bullard 11b, 11
b...Sensor 12...Delay time determining means

Claims (1)

[Claims] In the gluing mechanism of a packaging device, in which a box-shaped product with wrapping paper wrapped around the body is transferred onto a transfer path at non-uniform speed by a pusher, edges of the wrapping paper protruding from both ends of the product are folded in and glue is applied to the flaps. A rotation speed detection means for detecting the rotation speed per unit time of the main shaft of the drive motor that operates the pusher; a gluing gun that is disposed at a predetermined position on the transfer path and injects glue toward the flap in response to a signal input; a sensor disposed on the upstream side in the transport direction to detect the start and end of passage of the flap end; a dimension input means for inputting the external dimensions of the wrapping paper and the box-shaped product;
A delay in which the above rotational speed and external dimensions are read and calculated when the sensor detects the start of passage, and sends an operation start signal to the glue gun after an appropriate time, and also calculated when the end of passage is detected and sends an operation stop signal to the glue gun after an appropriate time. What is claimed is: 1. A gluing mechanism for a packaging device, comprising: time determining means.