JPH08295306A - Control device of packing machine - Google Patents

Abstract

PURPOSE: To easily set and adjust the operation times of respective operation parts by setting the operation start and stop timing operation times becoming the foundation of the respective operation parts on the basis of the count number of a timing signal and adjusting the same corresponding to the packing condition of a packing article to determine the operation times of the respective operation parts. CONSTITUTION: A packing machine packing an article to be packed by a stretch film is constituted of a feed-in mechanism 1, a film delivery and transfer mechanism 2, an elevator mechanism 3, a folding mechanism and a feed-out mechanism. In this case, the operation time of each operation part is determined as the count value of a timing signal on the basis of the count value showing the operation time becoming a foundation from a fundamental timing data memory means and the operation time adjusting quantity from an adjusting operation means by a control circuit 124 to be stored. The count value obtained from a timing signal generating means is compared with the count value stored in an operation time data memory means and, when the difference between both values becomes zero or a predetermined value, the operation part is operated or stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a packaging machine, and more particularly, to a packaging machine for packaging an article to be packaged with a stretch film, by appropriately adjusting the operation timing of each operating portion to obtain a finished package. Control device.

[0002]

2. Description of the Related Art It has been many years since a packaging machine for putting an article to be packaged in a dish-shaped container, that is, a tray, and packaging the article together with the transparent stretch film was put into practical use. During this period, various packaging machines have been proposed and improvements have been made. The same applies to the control device that controls the operation of each part that configures the packaging machine, but in the conventional control device, the operation timing of each part that configures the packaging machine is mainly performed by mechanical means such as a cam mechanism.

Further, as seen in Japanese Patent Laid-Open No. 58-160230, the film length is set and the time for the left and right folding plates and the front folding plate are set by an analog method such as volume resistance.

[0004]

However, the above-mentioned conventional control device for a packaging machine has the following problems. Since the operation timing of each part of the packaging machine is adjusted mainly via the cam mechanism, it can be easily adjusted by a person who does not have specialized knowledge in the assembly work, adjustment work and maintenance service work in the factory. It is difficult and requires a lot of time to educate these workers.
Further, since the manufactured packaging machine cannot obtain a constant mechanical timing due to the processing accuracy and assembly error of the parts, mechanical efficiency must be adjusted each time, and the work efficiency decreases.

Since the setting of the film length and the operation timings of the left and right folding plates and the front folding plate are performed by analog means such as a volume resistor, not only is it difficult to make adjustments when assembling the packaging machine, but it is also necessary to make adjustments once. It also had the drawback that it would be difficult to readjust if the value went wrong.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a control device for a packaging machine, and timing signal generating means for generating a timing signal in synchronization with rotation of a main power unit for driving the packaging machine. Among the operating parts that repeat the operation and stop of the packaging machine, it is necessary to adjust the operating time of the operation start timing and the stop timing. The basic operating time of each operating part is the timing signal from the timing signal generating means. Basic timing data storage means for storing as a count value, and adjustment operation means for adjusting the operating time, which is provided corresponding to each operating part requiring adjustment of the operating time, and which is the basic operating time of each operating part, An operation time data storage means for storing the adjusted operation time of each operation part, and a count value indicating the basic operation time from the basic timing data storage means The actuation time of each actuation unit is determined as the count value of the timing signal based on the actuation time adjustment amount from the adjusting operation means, the count value is stored in the actuation time data storage means, and the timing from the timing signal generation means is determined. The signal is counted, the count value is compared with the count value indicating the operating time of each operating portion stored in the operating time data storage means, and when the difference becomes 0 or a predetermined value, the operating portion is operated or stopped. It is composed of control means for controlling.

In the control device, the adjusting operation means has an adjusting operation means for manufacturer adjustment and an adjusting operation means for user adjustment, and the operation time data storage means is an operation time data storage means for the manufacturer. And the operation time data storage means for the user, and the control means is based on the count value indicating the basic operation time from the basic timing data storage means and the operation time adjustment amount from the adjustment operation means for manufacturer adjustment. The operating time of each operating part is determined as the count value of the timing signal, and the counted value is stored in the operating time data storage means for the manufacturer, and the operating time of each operating part from the operating time data storage means for the manufacturer is determined. Of the operating time of each operating part based on the count value indicating Determined as the count value of the signal, and configured to store the count value in the operating time data memory means for the user.

Further, in the control device, the operation time data stored in the operation data storage means includes the first operation time data indicated by the count value of the timing signal and the timer time smaller than the interval time of the timing signal. The control means compares the count value of the timing signal from the timing signal generating means with the count value of the first operation time data of each operating part, and the difference is 0 or a predetermined value. When it becomes a value, the second of the operating part concerned
The operating unit is configured to be activated after the timer of the operating time data of elapses.

[0009]

According to the present invention, by configuring the control device of the packaging machine as described above, the control means can adjust the count value indicating the basic operation time from the basic timing data storage means and the operation time adjustment from the adjustment operation means. Determine the operating time of each operating unit based on the amount as the count value of the timing signal,
The count value is stored in the operating time data storage means, the timing signal from the timing signal generating means is counted, and the count value and the count value indicating the operating time of each operating portion stored in the operating time data storage means. Compare
When the difference becomes 0 or a predetermined value, the operation part is operated or stopped. Therefore, the basic operation start timing and stop timing of each operation section that requires adjustment of the operation time of the packaging machine are digitally set on the basis of the timing signal count number from the timing signal generating means, and this is the basic operation. Since each operation time is determined by digitally adjusting the operation start timing and the operation stop timing, it is possible to easily set and adjust the operation time of each operation unit of the packaging machine.

[0010]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings. First, a packaging machine in which the control device according to the present invention is used will be described. 2 is a plan view showing the entire structure of the packaging machine according to the present invention, FIG. 3 is a vertical sectional front view (viewed from the direction of arrow A in FIG. 2), and FIG. 4 is a vertical side view (arrow B in FIG. 2). It is the view seen from the direction).

(Outline of Packing Machine) The packing machine has a carry-in mechanism 1 for carrying in an article to be packaged, a film pay-out transfer mechanism 2 for paying out and transferring a stretch film, and a film pay-out for the article to be packed carried in by the carry-in mechanism 1. An elevator mechanism 3 that pushes up the film transferred by the transfer mechanism 2, a folding mechanism 4 that folds the left and right and front and back of the film that is placed on the object to be packaged, and a carry-out mechanism 5 that carries out the packaged article that is folded by the folding mechanism 4. Composed of. Each of the above mechanisms will be described in detail below. For convenience of explanation, the left side of FIG.

(Introduction / Measurement of Items to be Packaged) An inflow frame 11 is provided at an inflow port 11 provided substantially in the center of the front surface of the machine frame 10, and a pusher conveyor 13 is provided in the inflow frame 12.
To arrange. The pusher conveyor 13 has a structure in which a pusher 13b is provided at a predetermined position of two endless chains 13a and has two sprockets 13c and 13c.
As a result, the pusher conveyor 13 is driven, and one article to be packaged is carried in each time the endless chain 13a makes a 1/2 turn.

On the loading side of the pusher conveyor 13, the weighing device 1
4 is provided to measure the items to be packaged. The pusher conveyor 13 is provided in front of the pusher conveyor 13.
A belt conveyor 15 is provided for carrying the article to be packaged carried in on the elevator head 17 of the elevator mechanism 3. The belt conveyor 15 has a structure in which six round rubber belts 15c are stretched between rollers 15a and 15b which are provided to be freely rotatable. The pusher conveyor 1
3. The belt conveyor 15 constitutes the carry-in mechanism 1.

(Elevator Mechanism) The elevator mechanism 3 is
It is composed of an elevator head 17, a mount 18 for mounting the elevator head 17, and a pair of arms 19, 19 supporting the mount 18, and a timing set in advance via a speed reducer 81 corresponding to the rotation of the electric motor 16. It is designed to move up and down.

The timing of this vertical movement is set by the cam shape of a cam mechanism, which will be described later, interposed in a mechanism for transmitting the power of the electric motor 16 to the mounting base 18. The elevator head 17 pushes up the article to be packed carried in by the pusher conveyor 13 and the belt conveyor 15 to the folding mechanism 4. Therefore, the descending end position of the elevator head 17 that moves up and down is set to a position that is substantially flush with the conveying surface of the belt conveyor 15, and the ascending end position thereof is the left and right folding plates 21, which will be described later, that constitute the folding mechanism 4. Two
2 and the front folding plate 23 are set so as to be substantially flush with each other.

Elevator head 17 and mount 18
2 and 4, it is composed of slit-shaped blocks 17-1 and 17-5. When the elevator head 17 moves up and down, the round rubber belt 15c of the belt conveyor 15 is attached to the elevator head 17c. Also, the mounting base 18 is prevented from abutting.

The central block 17-3 of the elevator head 17 further includes a plurality of small blocks 17-3a.
Each block 17-3a is always in an upright state by a biasing means (not shown), but is tilted rightward in the figure by a force from the left side in FIG.

Further, the blocks 17-1 and 17-2 above the central block 17-3 are tilted downward in FIG. 2 by a force from above in FIG. 2, and the blocks 17-4 and 17-below are shown in FIG. The reference numeral 5 is configured so as to be tilted upward in the figure by a force from the downward direction in FIG. This is to allow the folding operation of the folding mechanism 4 to be performed without any trouble, as will be described later.

Reference numeral 20 in FIGS. 2 and 3 is a positioning plate provided at the rear of the elevator head 17 for positioning the transported object carried in by the belt conveyor 15 on the basis of the rear end. is there.

(Film Feed-out Transport Mechanism) The film feed-out transport mechanism 2 for feeding out and transporting the stretch film feeds the stretch film from rolls 34, 34 'of the stretch film provided on the right side of the packaging machine as shown in FIG. It is a mechanism to clamp and transfer both ends. The stretch film rolls 34, 34 'are rolls wound with stretch films having different widths, and are a pair of support rollers 36, 36' and support rollers 37, 37 '.
And is configured to be selectively used depending on the size of the packaged item.

In the example shown in FIG. 4, the upper stretch film roll 34 is used. The stretch film delivered from the stretch film roll 34 is drawn out so as to wind around the support roller 36 ′ on the right side, and is sandwiched between the upper and lower delivery belts 39, 39 ′ and 40, 40 ′ via the end detection roller 38. It The stretch film sandwiched between the feeding belts 39, 39 'and 40, 40' is fed by the rotation of the belts 39, 39 'and 40, 40', and reaches the leading end thereof.

After that, the stretch film has both ends on the grippers 41, 4 of the chain conveyor 57 which will be described later.
It is sandwiched between the 1 ′ group and the round rubber belts 42, 42 ′ made of a rubber material, and a predetermined length necessary for packaging the article to be packaged is further fed. When the stretch film is fed out for a predetermined length, the cutter 43 is moved by the cutter driving device 44.
Is pushed up and the stretch film is cut. After cutting, the stretch film is lift head 1
After being transferred to a predetermined position on the upper part of 7, that is, the position where the center of the cut stretch film coincides with the center of the elevator head 17, it is stopped and waits there.

As shown in FIGS. 2 and 4, the group of grippers 41, 41 'and the round rubber belts 42, 42' are openings 25 formed by the left and right folding plates 21, 22 and the front folding plate 23 and the rear folding roller 24. And the descending end of the elevator head 17 and when viewing the packaging machine from above,
The openings 25 are arranged so as to face each other with the opening 25 in between.

In the present specification, regarding the folding mechanism 4, the carrying-out direction of the packaged object is called the rear side and the opposite side is called the front side, and this name is independent of the carrying-in direction of the packaged object. I'm using it.

The film feeding / transporting mechanism will be described in more detail with reference to FIGS. A pair of adjusting screws 45, 46 facing a predetermined position of the machine casing 10.
Are rotatably provided, and hypoid gears 47 and 48 are fixed to rear end portions of the adjusting screws 45 and 46, respectively. Further, a rotary shaft 49 is arranged along the rear surface of the machine frame 10.
The hypoid gears 50 and 51 meshing with the hypoid gears 47 and 48 are fixed at predetermined positions. A handle 52 is attached to the right end of the rotary shaft 49 on the outside of the machine frame 10. By rotating the handle 52, the adjusting screws 45 and 46 can be rotated via the rotary shaft 49. .

The screw pitches of the adjusting screws 45 and 46 are such that the upper side in FIG. 5 is dense and the lower side is sparse, and they are mutually opposite screws. Adjust screw 45,
Adjust blocks 53 to 56 each having a nut that meshes with a screw portion are provided near both sides of 46. A chain conveyor 57 is arranged with the adjusting blocks 53, 55 on the rear side as a base, and the chain conveyor 5 with the adjusting blocks 54, 56 on the front side as a base.
7'is placed. Each chain conveyor 57, 57 '
Are arranged in a divergent shape in the stretching film transport direction with respect to the central axis XX ′. As a result, the stretch film is strongly pulled as it is transported.

Since the chain conveyors 57 and 57 'have a substantially symmetrical structure, the chain conveyor 57 will be described below.
The structure will be described. As shown in FIG.
A mounting support member 58 is provided on the adjusting block 53, and a mounting support member 59 is provided on the adjusting block 55. The mounting base members 58 and 59 include the mounting base 6
0 is attached and fixed by a plurality of screws 58a and 59a. Sprockets 61 and 61 'are rotatably arranged at both ends of the mounting base 60, and an endless chain 57a is stretched between the sprockets 61 and 61'. As shown in FIG. 7, an endless round rubber belt 42 having a circular cross section is provided around the outer periphery of the chain 57a.

A plurality of grippers 41 are attached to the outside of the chain 57a so as to be rotatable about a shaft 41a at predetermined intervals. At the tip of the gripper 41,
Semicircular recess 41b shaped to fit the round rubber belt 42
Are formed. A support plate 62 is attached to the upper part of the mounting board 60 by a screw 63 over a predetermined range, and a protrusion 62a integrally formed with the support plate 62 is fitted into a central recess of the chain 57a. And integrally supports the other protruding portion 6
2b engages with an engaging hook portion 64a that is integrally formed with a mounting plate 64 to which the gripper 41 is attached, and guides and supports the mounting plate 64.

Three movable guide members 65-67 and 65'-67 'on the left side, the center, and the right side are provided at predetermined positions outside the chain conveyors 57, 57'. The movable guide members 65 to 67 and 65 'to 67' have substantially the same structure, and the movable guide members 65 to 67 and 6 '
The rear ends of three grippers 41 are engaged with 5 ′ to 67 ′, and the three grippers 41 are connected to the shafts 41a by the operation of the solenoid 68 as shown in FIG. 7, for example.
Simultaneously rotating around the center of the round rubber belt 42 as shown by the alternate long and two short dashes line. When the solenoid 68 is made inoperative, the tip recesses 41b of the three grippers 41 are pressed against the round rubber belt 42. The stretch film is sandwiched between the tip concave portion 41b of the gripper 41 and the round rubber belt 42 and is transferred.

Gripper movable members 72, 72 'for opening and closing one gripper 41 are provided at the ends of the chain conveyors 57, 57' on the stretch film supply side, that is, in front of the entrance of the cutter 43. Since the structures of the gripper movable members 72 and 72 'are almost the same, the gripper movable member 72 will be described.

As shown in FIG. 8, the gripper movable member 72 has a structure similar to that of the movable guide member 65.
The width dimension of the upper pressing plate 72a and the lower pressing plate 72b is small because only one gripper 41 is opened and closed. The excitation and demagnetization of the solenoid 73 causes the gripper 41 to rotate about the shaft 41a and separate the tip recess 41b from the round rubber belt 42 or press the round rubber belt 42 into pressure contact with the movable guide member 65. . Fixed guide members 74 and 75 are provided near the sprocket 61 '.

The gripper 4 when the chain conveyors 57, 57 'rotate around the sprocket 61' on the film supply end side.
The opening / closing operation of No. 1 will be described with reference to the drawings. 9 is an enlarged plan view near the sprocket 61 'of the chain conveyor 57, FIG. 10 is an enlarged side view thereof, and FIG. 11 is an enlarged front view thereof. The chain conveyor 57 is indicated by arrows E and F in FIG.
Rotate as shown in FIG.

The rear end of the gripper 41 that has moved together with the chain conveyor 57 is pushed by the front end inclined surface 74a of the fixed guide member 74 and rotates about the shaft 41a, and the front end recess 41b is separated from the round rubber belt 42. It is parallel to the fixed guide member 74 at the central portion of the sprocket 61 '. When the rotation advances and moves to a portion in contact with the inclined surface 75a of the fixed guide member 75, the front end of the gripper 41 is pushed by the inclined surface 75a of the fixed guide member 75 and the shaft 41a.
Is rotated in the opposite direction to the fixed guide member 74.
The tip recess 41b abuts on the round rubber belt 42 at the central portion thereof and advances between the lower pressing plate 72b and the upper pressing plate 72a of the gripper movable member 72.

(Film Folding Mechanism) The folding mechanism 4 has a left folding plate 21, a right folding plate 22, a front folding plate 23 and a rear folding roller 24, as shown in FIG. The elevator head 1 includes the front folding plate 23, the front folding plate 23, and the rear folding roller 24.
The opening 25 through which the object to be packaged pushed up by 7 passes is formed. The left folding plate 21 and the right folding plate 22 are
The left and right sides of the film covering the article to be wrapped are folded, and the front side corner of the side facing the opening 25 is formed into an arc shape with a large radius of curvature to improve the escape of the film. It is an arc-shaped flat plate with a small radius of curvature.

Parallel guide bars 26, 26 'facing the opening 25 are provided on both upper sides of the machine frame 10, and sliding members 2 are provided on the guide bars 26, 26, 26', 26 ', respectively.
7, 27, 27 'and 27' are slidably provided, and the left folding plate 21 and the right folding plate 22 are attached to the lower portions of the sliding members 27, 27, 27 'and 27', respectively. The left folding plate 21 is linked to a drive shaft (not shown) via a crank mechanism. Proximity shafts 118c and 118c ′ are provided near the left and right folding plates 21 and 22 (see FIG. 14), and rotary shafts 118b and 118c ′ are provided on the respective pivot shafts 118c and 118c ′.
Attach 118b 'rotatably.

The rear ends of the rotary rods 118b and 118b 'are
The left and right folding plates 21 and 22 are rotatably linked. The rotary rods 118b and 118b 'are rotatably linked to the link 118, and the link 118 causes the left folding plate 21 and the right folding plate 22 to be in mutually opposite directions,
That is, the opening 25 moves forward or backward from the center of the opening 25.

As shown in FIG. 2, the front folding plate 23 is a flat plate on which a front folding roller 23a is freely rotatably provided on the side facing the opening 25. Side guide rails 28, 28 'are arranged on the machine frames 10 on both sides of the opening 25, and the first sliding members 29, 29' are arranged on the side guide rails 28, 28 '.
And second sliding members 30 and 30 'are provided, and each sliding member 2
Attach the front folding plate 23 to 9, 29 '. One sliding member 29 and the first drive shaft 31 are linked via a crank mechanism 33 so that the front folding plate 23 advances toward the rear folding roller 24 or retracts from the rear folding roller 24.

The crank mechanism 33 includes a rotary rod 33b fixed to the first drive shaft 31 and rotatably linked via a pivot 33c. A pusher 69 is attached to the sliding members 30 and 30 ', and the second drive shaft 31' and the crank mechanism 33 'advance the rear folding roller 24 toward the rear folding roller 24 like the front folding plate 23.
It is designed to retreat from 4.

(Unloading Mechanism of Packaged Object) The carry-out mechanism 5 pushes out the packaged article in which the left and right and front stretch films are folded by the folding mechanism 4 and pushes out the packaged article pushed out by the pusher 69. It is composed of a width-adjusting slider 70 for placing and width-adjusting, a heat belt 71, and the like. The object to be packaged is pressed by the pusher 69, and the subsequent stretch film is folded by the rear folding roller 24. The article to be packaged is placed on the heat belt 71, and after the film is welded and the label is automatically attached, it is carried out to the outside.

(Driving system of packaging machine) Next, a driving system for driving each part of the package will be described. FIG. 12 is a system diagram showing a drive system of the packaging machine. In the figure, reference numeral 16 denotes an electric motor which is a drive source of a drive system. A V belt 80 is fixed to a rotary shaft of the electric motor 16 and a V belt 83 is connected to a V pulley 82 fixed to an input rotary shaft of a speed reducer 81. Power is transmitted via the. A slit disk 84 having a structure to be described later is fixed to one output rotation shaft of the speed reducer 81, and a sensor 85 detects movement of a slit formed in the slit disk 84 to control power of the packaging machine. Get timing signals for.

A sprocket 86 is fixed to another output rotary shaft of the speed reducer 81, and power is transmitted from the sprocket 86 to a sprocket 88 fixed to a main drive shaft 87 of the packaging machine via a chain 89. .

The main drive shaft 87 has a sprocket 9
0, 91, 92 are fixed, and an elevator vertical movement cam 93 is fixed at one end. The sprocket 92 transmits power to the sprocket 13 c of the pusher conveyor 13 via the chain 94, and the sprocket 91
Transmits power to the sprocket 96 fixed to the rotary shaft of the roller 15b that gives power to the round rubber belt 15c of the belt conveyor 15 via the chain 95.

The elevator vertical movement cam 93 is connected to the levers 19 and 1 via a drive rod 98 which is driven vertically about a fulcrum 97.
The elevator head 17 is moved up and down by applying power for driving the elevator 9 up and down. Further, the sprocket 90 is attached to the sprockets 103 to 106 by the chains 99, 100, 101, 1.
Power is transmitted via 02. The sprocket 103 is
Power is transmitted to the electromagnetic clutch brake 108 via the 90-degree bevel gear 107, and the electromagnetic clutch brake 108
Power is transmitted to the sprocket 111 fixed to the drive shaft 110 of the film feeding / transporting mechanism 2 via the chain 109.

Thus, the feeding belts 39, 39 ', 40, 40' for feeding and supplying the stretch film.
Also, the round rubber belts 42, 42 'for sandwiching and transferring both ends of the stretch film, and the chain conveyors 57, 57' to which the grippers 41, 41 'are attached at predetermined intervals rotate by receiving driving force.

The sprocket 104 transmits power to the electromagnetic clutch brake 113 via the 90-degree bevel gear 112, and the electromagnetic clutch brake 113 gives power to the front folding plate 23. The sprocket 105 transmits power to the electromagnetic clutch brake 115 via the 90-degree bevel gear 114.

The electromagnetic clutch brake 115 transmits power to the discharge pusher 69. Also sprocket 106
Transmits power to the electromagnetic clutch brake 117 via the 90-degree bevel gear 116, and the electromagnetic clutch brake 1
The left and right folding plates 21, 22 transmit a driving force that goes straight toward the center of the opening 25 and a driving force that recedes from the center to the left and right folding plates 21, 22 in cooperation with the sliding members 27, 27 ′ and the crank mechanism 118.

By configuring the drive system of the packaging machine by independent drive means with the electromagnetic clutch brakes 108, 113, 115, 117 interposed as described above, for example, accidents such as tipping or jamming of the packaged item can be performed. When the packaging machine is stopped due to an emergency, the electromagnetic clutch brakes 108, 113, 1 are turned on by turning on the clutch release button on the control panel.
If the members 15 and 117 are released, the respective members constituting the film feeding / transporting mechanism 2, the folding mechanism 4 and the carrying-out mechanism 5 can be manually moved individually to fall or fall.
Even if it becomes clogged, the work to remove the items to be packaged will be easy and the time to restart the operation will be extremely short.

In the above embodiment, the power of the electric motor 16 is used as an independent driving means to drive the electromagnetic clutch brake 10.
8, 113, 115, 117 are shown to intervene in the transmission, the electric motor 16 and the electromagnetic clutch brakes 108, 113, 115, 117 are replaced by electric motors capable of forward and reverse rotation, respectively, and the rotation direction is changed. It is also possible to automatically move the member by making an appropriate selection.

(Overall Structure of Controller) The above is the description of the mechanical structure of the packaging machine and its drive system. The control device of the packaging machine will be described below. FIG. 1 is a block diagram showing the configuration of the control device of the packaging machine. In the figure, the solid line indicates the electrically transmitted portion, and the dotted line indicates the mechanically transmitted portion. The control device includes a central processing unit 120, an operation display panel unit 121, a timing adjustment unit 122, a storage unit 123,
The input / output control circuit 124, the drive control unit 125, the timing detection unit 126, the programmable timer 127, and the package size detection unit 128 are included.

The operation display panel section 121 is composed of an operation section 121a for issuing an operation command for each section to the central processing unit 120, and a display section 121b for performing various detection displays based on signals from the central processing unit 120.

The timing adjusting section 122 is composed of a timing adjusting switch 122a and an encoder 122b, and includes the left and right folding plates 21 and 22, the front folding plate 23,
It is used to adjust the operation timing of each part of the packaging machine such as the discharge pusher 69.

The storage unit 123 is a read-on memory (RO
M) 123a and random access memory (RAM) 1
The ROM 123a stores reference timings and various programs described later, and the RAM 123b stores various data such as timing correction values described later.

The input / output control circuit 124 is the central processing unit 1.
20 outputs a signal to the drive control unit 125 or the programmable timer 127, a timing signal from the timing detection unit 126, and a signal from the programmable timer 127 and the package size detection unit 128 to the central processing unit 1.
20 is an interface control circuit to be input to 20.

The drive control section 125 includes drive circuits 125a ...
It is composed of 125j. The drive circuit 125a is the electric motor 1
6 and a speed reducer 81 for driving a main power unit 129, a drive circuit 125b for exciting the electromagnetic clutch brake 108 for driving the film feeding and transporting mechanism 2, and a drive circuit 125c for connecting the left and right folding plates 21, 22. A circuit for exciting the electromagnetic clutch brake 117 for exciting,
The drive circuit 125d is a circuit for exciting the electromagnetic clutch brake 113 for exciting the front folding plate 23, and the drive circuit 125d.
Reference numeral e is a circuit for exciting the electromagnetic clutch brake that drives the discharge pusher 69.

The driving circuit 125f is a movable guide member 6 for the left and right.
The gripper 4 which drives 5, 65 ', 67, 67' and engages with the left and right movable guide members 65, 65 ', 67, 67'.
The driving circuit 125g drives the movable guide member 66 'in the center of the front side to open the gripper 41 engaged with the movable guide member 66'.
5h is a circuit that drives the movable guide member 66 at the center of the rear side to open the gripper 41 that engages with the movable guide member 66, and a drive circuit 125i is a circuit that activates the drive motor 130 that operates the width-shifting slider 70. Circuit 125j
Is a circuit that activates the drive motor 131 that rotates the heat belt 71.

The timing detection unit 126 is fixed to the rotary shaft of the speed reducer 81 shown in FIG. 12, and detects a signal from a timing signal generator composed of a slit disk 84 and a sensor 85 which rotate with the rotation of the rotary shaft. Then, the left and right folding plates 21, 22 of the packaging machine, the front folding plate 23, and the like are driven to detect respective timing signals serving as timing references.

The central processing unit 120 sends a signal to each of the drive circuits 125a to 125j through the input / output control circuit 124 based on the timing signal from the timing detection unit 126 and the data stored in the operation timing register of the RAM 123b of the storage unit 123 described later. Then, each part of the packaging machine is driven at a predetermined timing. The configuration and operation of each of the above parts will be described in detail below.

(Timing Signal Generator) FIG. 13 is a view showing the structure of the slit disk 84 fixed to the rotary shaft of the speed reducer 81. As shown in the figure, the slit disc 84 is provided with a slit TPA for timing signal on the outermost side on the concentric circle of the disc 84a, and the slit TP on the inner concentric circle.
A slit TPB for direction detection, which is delayed by a predetermined angle from A, is provided, and a slit TPO for zero point detection is provided at a predetermined position inside the slit TPB. Light passing through these slits is detected by the sensor 85 (see FIG. 12) and sent to the timing detection unit 126.

(Timing Detection Unit) FIG. 14 is a block diagram showing the arrangement of the timing detection unit 126. The sensor 85 is composed of each sensor 85a, 85b, 85c,
Timing signal tpa, direction detection signal tpb, and zero detection signal t from slits TPA, TPB, and TPO, respectively.
The signal po is detected and sent to the waveform shaping comparators A1, A2 and A3. The timing signal tpa from the comparator A1 is input to the overload detection circuit 135, the direction detection circuit 136 and the input / output control circuit 124, and the direction detection signal tp from the comparator A2.
b is input to the direction detection circuit 136. The zero detection signal tpo from the comparator A3 is input to the input / output control circuit 124. Further, the output signal sm of the overload detection circuit 135 and the output signal rm of the direction detection circuit 136 are also input / output control circuit 12
4 is input.

(Direction detection) The relationship between the timing signal tpa and the direction detection signal tpb is as shown in a and b of FIG. When the electric motor 16 is rotating in the normal direction, the direction detection signal tpb is at the L level at the rising edge of the timing signal tpa as shown in FIG. 7A, and when the electric motor 16 is rotating in the reverse direction, it is shown in FIG. As shown in, the direction detection signal tpb is at the H level at the rising edge of the timing signal tpa. Therefore, if the relationship between the timing signal tpa and the direction detection signal tpb is known, it is possible to detect whether the electric motor 16 is rotating normally or reversely.

FIG. 16 is a diagram showing an example of the direction detection circuit 136. The direction detection circuit 136 is composed of a D type flip-flop, and the timing signal tpa is input to the D terminal. Therefore, when the timing signal tpa is at the H level when the direction detection signal tpb rises, the output signal rm becomes the H level, and when the timing signal tpa is at the L level when the direction detection signal tpb rises, the output signal rm becomes the L level. Become.

Therefore, when the output signal rm is at the H level, the electric motor 16 rotates in the forward direction, and when it is at the L level, the motor 16 rotates in the reverse direction. When the output signal rm of the direction detection circuit 136 is input to the central processing unit 120 via the input / output control circuit 124 and the reverse rotation of the electric motor 16 is detected, the electric motor 16 is immediately stopped to generate an error signal and the display unit 121b. To display. With the above configuration, even if the connection of the three-phase outlet and the connection of the three-phase motor do not match, such as when the packaging machine is delivered or when the installation location is moved, the reverse rotation of the motor is immediately detected and the motor is stopped. , The packaging machine will not be damaged.

(Overload Detection) FIG. 17 shows the relationship between the timing signal tpa and the direction detection signal tpb when the electric motor 16 is started, before steady rotation and during steady rotation. As shown in the figure, the time interval of the timing signal tpa changes from t1, t2, and t3 at the time of starting the motor, before steady rotation, and during steady rotation.
In the case of overload, the time intervals t1, t2, t3 become long. Therefore, by monitoring the time intervals t1, t2, t3, it is possible to determine whether or not there is an overload.

FIG. 18 is a diagram showing an example of the overload detection circuit 135. The overload detection circuit 135 includes four timer circuits TM1, TM2, TM3, TM4, a control circuit CS,
It is composed of a multiplexer M1 and an OR circuit OR. Each of the timer circuits TM1, TM2, TM3 has a timing signal t at the time of starting, before steady rotation, and at steady rotation.
The time intervals t1, t2, t3 of pa are set.

The start signal MS is input to the S terminal (set terminal) of each timer circuit TM1, TM2, TM3, and the timing signal tpa is input to the R terminal (reset terminal).
Is entered. The time interval of the timing signal tpa is t
1, t2, t3 or more, the timer circuit T
Overload detection signals SM1, SM from M1, TM2, TM3
2, SM3 are output, and the control circuit CS operates the multiplexer M1 in response to a command from the timer circuit TM4 to send an overload detection signal SM to the central processing unit 120 via the OR circuit OR and the input / output control circuit 124.

When the overload detection signal SM is input, the central processing unit 120 immediately stops the packaging machine and displays a message to that effect on the display unit 121b. With such a configuration, even if the packaging machine is overloaded for some reason, the packaging machine is automatically stopped and is not damaged.

Here, the timer TM at the time of starting the electric motor 16
2, TM3 time up, overload detection signal SM2
Although SM3 is output, since the overload detection signals SM2 and SM3 cannot pass through the multiplexer circuit Ml at the time of starting as described later, the overload detection signal SM is not output.

The multiplexer circuit Ml causes the control circuit CS to pass the overload detection signal SM1 when the electric motor 16 is started, pass the overload detection signal SM2 after the electric motor 16 is started and before the steady rotation, and when the normal rotation is performed. Is designed to pass the overload detection signal SM3. This is set by the timer circuit TM4. Therefore, when the electric motor 16 is started, the overload detection signals SM2, SM
Even if 3 is output, the output is prohibited by the multiplexer circuit Ml.

The reverse rotation detection and the overload detection of the electric motor 16 are performed by hardware means.
Naturally, it is possible to detect by software means, and in this case, the overload detection circuit 135 and the direction detection circuit 136 are not necessary. Note that the direction can be detected by software means by determining whether the direction detection signal tpb is H or L when the timing signal tpa is input, that is, when the timing signal tpa rises. .

To detect an overload, the timer is started each time the timing signal tpa is input, and the time measured by the timer when the next timing signal tpa is input has exceeded the predetermined time. It may be determined whether or not it is. Then, the set time of the timer is switched to a predetermined value at the time of starting the motor, before steady rotation, and during steady rotation. In the above embodiment, the slit disc 84 is provided with the slit T for the timing signal.
Although both PA and the direction detection slit TPB are provided, it is possible to generate the timing signal tpa and the direction detection signal tpb with only one of the slits. In this case, the signals generated by the detection sensors are arranged at positions having a predetermined phase relationship.

(Summary of Operation Timing Adjustment) The packaging machine having the above-described structure has a carrying-in mechanism 1, a film feeding / transporting mechanism 2, an elevator mechanism 3, during assembly work in a factory.
It is necessary to adjust the operation timings of the respective operating parts of the folding mechanism 4 and the carry-out mechanism 5 so that the packaging machine operates normally.

Further, at the time of maintenance service, it is necessary to readjust to operate normally when the timing of each operating part is misaligned due to some cause during use. Furthermore, in order to improve the packaging finish of the items to be packaged,
The operation timing of the gripper movable member 72, the operation timing of the left and right folding plates 21, 22, the front folding plate 23,
It is necessary to adjust the operation timing of the movable guide members 65 to 67 and 65 'to 67'.

The operation timing of the left and right folding plates 21, 22 by the electromagnetic clutch brake 117, the activation timing of the front folding plate 23 by the electromagnetic clutch brake 113, and the discharge pusher 6 by the electromagnetic clutch brake 115.
9, the operation timing of the film feeding transfer mechanism 2 by the electromagnetic clutch brake 108, the closing and opening timing of the gripper 41 by the gripper movable member 72, the film cutting timing by the cutter 43, and the movable guide members 65-67, 65'-67. The timing when the film clamp is released by operating 'is adjusted by the manufacturer at the time of assembly adjustment work or maintenance service.

The timing of film cutting by the cutter 43 and the movable guide members 65 to 67, 65 '.
The timing of activating 67 'and opening the film clamp is configured so that it can be adjusted appropriately according to the type, size, etc. of the article to be packaged when the user operates the packaging machine to perform the packaging work. This adjustment is made automatically by detecting the type, size, etc. of the article to be packaged with an optical sensor or the like.

In the above example, the basic mechanical charts of the respective operating parts are set with reference to the count value of the timing signal tpa. For example, in the above-mentioned embodiment, the slit disk 84 is formed by one cycle of the packaging machine.
The slits TPA are rotated every 12 degrees, that is, 30 slits (= 360 degrees / 12 degrees) are provided in total. Therefore, a total of 30 timing signals tpa are generated during one cycle of the packaging machine, and the mechanical chart of each operating unit is based on the count value of the timing signal tpa, that is, the rotation angle of the slit disk 84. It is set based on.

(Adjustment of operation timing on the maker side) Hereinafter, the operation timing adjustment of each operation portion will be performed by the front folding plate 23.
The operation will be specifically described as an example. The solid line in FIG. 19 is a diagram showing a basic mechanical chart set as described above, and the horizontal axis represents the count value TC of the timing signal tpa from the timing detection unit 126. Front folding board 2
3 starts the operation (hereinafter referred to as “closing operation”) toward the rear folding roller 24 at the timing FT1 (TC = 6), and the timing FT2 (TC = 15).
At that, the closing operation is completed and stopped.

Next, at the timing FT3 (TC = 18), the front folding plate 23 starts its operation toward its original position (hereinafter referred to as "opening operation"), and the timing FT.
At 4 (TC = 27), the opening operation is completed. The closing operation of the front folding plate 23 is performed by the electromagnetic clutch brake 11
3 is excited by exciting the clutch coil, and the stop is performed by exciting the brake coil of the electromagnetic clutch brake 113.

Now, the closing operation start timing FT1 of the front folding plate 23 and the closing operation stop timing FT
2. A case where the opening operation start timing FT3 and the opening operation stop timing FT4 are individually adjusted will be described.

Switches MSW1 to MSW4 for adjusting the timings FT1 to FT4 shown in FIG. 20 are provided at predetermined positions on the printed circuit board. The switches MSW1 to MSW4 are not limited to the printed circuit board as long as the user does not have to operate the switch by mistake, and an operation unit for maintenance may be provided and installed there. The switches MSW1 to MSW4 are changeover switches that can be switched in seven steps of dial scales -3 to +3. The position information of the switches MSW1 to MSW4 is input to the central processing unit 120 which is converted into a predetermined signal by the encoder 122b.

As shown in FIG. 21A, the front folding plate 23 is provided at a predetermined location of the ROM 123a of the storage section 123.
Basic timings FT1, FT2 of closing and opening operations of
Count values TC of FT3 and FT4 = 6, 15, 18, 2
Basic timing storage area TMa for storing 7
To provide. Further, in the RAM 123b of the storage unit 123, as shown in FIG.
An adjustment timing storage area TRMa (hereinafter referred to as “operation timing register”) for storing the adjusted count value TC of ˜FT4 ′ is provided.

The CPU 120 controls the count values T of the timings FT1 to FT4 stored in the ROM 123a.
A numerical value designated by the position information of the switches MSW1 to MSW4 is added or subtracted from C, and the calculated numerical value is written and stored in the operation timing register TRMa.

That is, the switches MSW1 to MSW4
, Respectively, -1, -1, +1, +1 as shown in FIG.
Then, the central processing unit 120 causes the count values TC = 6, 15, 1 of the timings FT1 to FT4 stored in the basic timing storage area TMa of the ROM 123a.
The numerical values designated by the switches MSW1 to MSW4 are added or subtracted from the switches 8 and 27, and the timings FT1 ′ to FT1 ′ of the closing operation and the opening operation of the front folding plate 23 after the calculation are performed.
FT4 'count value TC = 5, 14, 19, 28 is R
It is written and stored in the operation timing register TRMa of the AM 123b. At this time, the mechanical chart is shown in FIG.
Is indicated by the dotted line.

As described above, the central processing unit 120 rewrites the operation timing register TRMa corresponding to the switches MSW1 to MSW4 each time the switches MSW1 to MSW4 are switched. Hereinafter, specific control for operating each operating unit based on the operation timing register TRMa will be described using the front folding plate 23 as an example.

FIG. 22 is a flow chart showing the flow of the above control. For convenience of explanation, each of the above timings FT1 '
Registers that store the count value TC of ˜FT4 ′ are referred to as registers TRMa1 to TRMa4, respectively. This flow chart shows only the parts necessary for explaining the present invention. When in the standby state, the central processing unit 120 monitors whether or not the count value TC of the timing signal tpa has been updated (step 200).

The update of the count value TC is performed in the interrupt processing routine, using the timing signal tpa as an interrupt signal every time the timing signal tpa is input. In this interrupt processing routine, the updated count value TC is stored in the RAM 12
Count value register TCA provided in a predetermined area of 3b
The flag TCF indicating that the count value TC has been updated is set. Therefore, in step 200, this flag TCF is checked. When this flag is set, the contents of the count value register TCA are read into the accumulator register A in the central processing unit 120 (step 201).

Next, the contents of the accumulator register A are compared with the contents of the register TRMa1 (step 202).

If the comparison results match, the subroutine program SUB1 is executed (step 20).
3).

This subroutine program SUB1 is
In the processing program that starts the operation of the front folding plate 23,
Specifically, via the input / output control circuit 124, the drive circuit 12
A control signal is sent to 5d to excite the clutch coil of the electromagnetic clutch brake 113.

If the comparison result does not match in step 202, the contents of the accumulator register A and the contents of the register TRMa2 are compared (step 204). If the comparison results match, the subroutine program SUB2 is executed (step 20).
5).

This subroutine program SUB2 is
A processing program for stopping the operation of the front folding plate 23, specifically, a control signal is sent to the drive circuit 125d via the input / output control circuit 124, and the electromagnetic clutch brake 113 is sent.
Energize the brake coil of. If the comparison result does not match in step 204, then the contents of the accumulator register A are compared with the contents of the register TRMa3 (step 206).

If the comparison results are in agreement, the subroutine program SUB1 is executed (step 20).
7).

If the comparison results do not match, the contents of the accumulator register A and the register TRMa4
Is compared with the contents of (step 208).

If the comparison results are in agreement, the above subroutine program SUB2 is executed (step 20).
9). If they do not match, the following processing is executed.

Although only the front folding plate 23 has been described in the above case, the basic count value TC is actually stored in the basic timing storage area TMa of the ROM 123a for all the operating timings of the operating parts to be adjusted. Is stored and a changeover switch for adjustment is provided.

Then, the values determined by the basic count value TC and the changeover switch MSW are written and stored in the respective operation timing registers set in the predetermined area TRMa of the RAM 123b. Then, each time the count value TC is updated, the contents of the respective operation timing registers are compared with each other, and if they coincide with each other, the respective processes defined in advance in association with the respective operation timing registers are executed. Configure.

The case has been described above where the manufacturer operates the timing adjustment switch 122a of the timing adjustment unit 122 to adjust the operation timing of each operation unit in the assembly work, adjustment work, and maintenance work.
As described above, a part of the operation timing of each operation unit, for example, the timing of operating the left and right guide members 65, 67, 65 ′, 67 ′, the timing of stopping the film feeding transfer mechanism 2, and the like are provided on the operation display panel 121. The adjustment is performed by operating the adjustment operation switch of the operation unit 121a or the detection information from the package size detection unit 128.

In this case, the operation timing register TR is set in a predetermined area of the RAM 123b as shown in FIG.
In addition to Ma, a basic timing register TRMb for storing the timing value adjusted by the manufacturer is provided, and RO
The timing value determined by the basic timing count value TC stored in the basic timing storage area TMa of the M123a and the position information of the adjustment switch for manufacturer operation is stored in the basic timing register TRMb, and the basic timing register TRMb is stored. The operation timing value determined by the timing value stored in the operation timing information and the position information of the adjustment switch of the operation unit 121a operated by the user is stored in the operation timing register TRMa, and the timing value stored in the operation timing register TRMa is stored. Controls the operating part.

(Adjustment of Operation Timing on User Side) Hereinafter, as a specific example of the adjustment of operation timing on the user side, the left and right guide members 65, 67, 65 ', 67' are operated, and the grippers 41, 41 'engaged with the left and right guide members 65, 67, 65', 67 'are operated. The adjustment of the so-called film left and right clamp release timing for releasing will be described.

Now, assuming that the count value TC of the basic timing of the film left / right clamp release timing TC1 is set to 5, as shown in FIG. 23, the count value TC of the left / right clamp release timing TC1 is set in the basic timing storage area TMa of the ROM 123a. = 5 is memorized. In addition, the switch MSW for adjusting the release timing TC1 for the manufacturer as shown in FIG.
5 is provided. This switch MSW5 is a changeover switch that can be changed over in seven stages of dial scales -3 to +3, like the changeover switches MSW1 to MSW4.

As shown in FIG. 25, the operation section 121a of the operation panel is provided with an adjusting operation switch USW1 for adjusting the left and right clamp release timing TC1 for the user. Since the state can be adjusted, the adjustment operation switch USW1 is called a tension adjustment switch. The tension of the film becomes strong when the count value of the release timing is large, and becomes weak when the count value is small. Adjustment operation switch USW1
It is possible to switch the dial scales 1 to 5 in five steps, and the scale of each dial corresponds to the value added to the count value TC.

Corresponding to the manufacturer adjustment switch MSW5, the RAM 123b is provided with an operation timing register TMRa and a quasi-basic timing register TMRb as shown in FIG.

The quasi-basic timing register TMRb contains
The count value of the left and right clamp release timing TC1 stored in the basic timing register TMa shown in FIG. 23 = 5, and the position information of the manufacturer adjustment switch MSW5−
1 and the count value T of the left and right clamp release timing TC1 ′, which is a quasi-basic test by the central processing unit 120.
C = 4 is stored, and the operation timing register TMRa is determined by the central processing unit 120 from the count value TC = 4 stored in the quasi-basic timing register TMRb and the position information 3 of the adjusting operation switch USW1. Left and right clamp release timing TC1 ″ count value TC =
7 is stored.

As in the case described above, when the count value stored in the operation timing register TMRa and the count value of the timing signal of the count value register TCA match, the left and right guide members 65, 67, 65 ', 6
Grippers 41, 41 'for actuating and engaging 7'
To release. In this way, the manufacturer's adjustment switch M
By adjusting SW5, the range of timing values that can be adjusted by the adjusting operation switch USW1 for the user changes.

When the apparatus of the above embodiment is adjusted during the assembling work, it is carried out as follows. First of all, after assembling the mechanical parts, all switches MSW for manufacturer adjustment are set to "0".
Adjusting operation switch US for the user's scale
The apparatus is operated with W all set to a predetermined scale, for example, "1". In this case, if mechanical conditions such as machining accuracy and mounting accuracy are completely as designed, the device operates according to a predetermined mechanical chart and does not require any particular adjustment. However, in reality, it does not normally operate as designed due to manufacturing errors associated with processing or assembly.

In this case, the operation timing of each part is adjusted by operating the manufacturer adjustment switch MSW. For example, when the timing of starting the closing operation of the front folding plate 23 is later than the designed timing, the switch MSW1 is switched to the minus direction. Then restart the device and check if the device works as designed. In this way, adjustments are made for all out-of-timing actuators.

Further, also at the time of maintenance service, it is possible to adjust the part where the timing is out of order by the same method as described above.

As described above, the control device of the above embodiment is
Since the operation timing of each operating part of the packaging machine can be adjusted electrically and digitally by simple switching operation of various switches, there is no need for complicated mechanical adjustment of the device operating part as in the past. The timing adjustment work becomes extremely easy.

Further, since the operation timing of each operating portion requiring adjustment can be adjusted independently, even if the timing of one operating portion is changed, it may affect the timing of the other operating portion. Since there is no such adjustment, the adjustment work is extremely simplified, and the adjustment work can be standardized without the need for detailed knowledge of each mechanical unit that constitutes the packaging machine.

The apparatus of the above embodiment uses the switching position information of the adjustment changeover switch MSW as numerical data, and the central processing unit 12 uses the reference timing count value TC stored in the ROM 123a and the numerical data.
Although the count value TC of the operation timing of each actuating portion is obtained by performing the arithmetic processing with 0 and the count value TC is written in the registers TRMa and TRMb, the present invention is not limited to this, and it is not limited to this. As is clear from the description of the control device, in short, by operating the adjustment switch, the count value TC of the adjusted operation timing of the operation part requiring the adjustment is obtained, and the count value T
It suffices if it is configured to write C into the operation timing register TRMa.

For example, as shown in FIG. 27, the ROM 12
In the basic timing storage area TMa of 3a, the count value TC required for adjustment as the basic timing value of each operating unit is stored in advance as the position information of the adjustment switch MSW1 ', and the adjustment switch MSW is stored.
By switching 1 ′, any one of the stored count values TC may be selected and stored in the operation timing register TRMa of the RAM 123b.

In the example of the figure, the count value "6" is selected by the position information in "1" of the adjustment switch MSW1 ', and the count value TC is stored in the operation timing register TRMa. In this case, a large capacity is required in the basic timing storage area TMa of the ROM 123a, but it is not necessary to calculate the count value TC as the operation timing of the operation unit by the central processing unit 120 as in the above embodiment. .

(Operation Timing Adjustment Below Timing Signal Interval Time)
Further, in the case of the above-described embodiment, since the count value of the timing signal tpa is controlled as the minimum unit, the operation timing adjustment width is limited to 1 count. In particular,
In the above example, the slits TPA of the slit disk 84 are spaced at 12 degrees, so that one rotation of the slit disk 84 generates 30 count pulses.

Therefore, when the time of one cycle of the packaging machine (the time required for the slit disc 84 to make one rotation) is set to 2 seconds, the minimum adjustment width is limited to 1 count of the timing signal tpa = 67 ms. Will end up. Therefore, it is impossible to adjust the time width below that. Therefore, when it is necessary to make further adjustment within one count, a method is adopted in which a timer is used and the operation timing is established by using the count value TC of the timing signal tpa and the delay time from the count value TC using the timer. To do. Below, 1 /
A case where the operation timing is adjusted within the range of 2 counts will be described.

As shown in FIG. 28 (a), the count value TC is stored in the operation timing register TRMa of the RAM 123b to mean each switching position of the adjustment switch MSW6 as shown in FIG. 28 (b). A portion and a portion for storing the delay time information Tm are provided.

Now, R corresponding to the adjustment switch MSW6
Assuming that the count value of the basic timing stored in the OM 123a is "5", the adjustment switch MSW6 is shown in FIG.
As shown in FIG. 8, when the switching position is "-1", "4" (4 = 5-1) is written in the part storing the count value TC, and the storage part storing the delay time information is stored. "1" is written. Every time the count value TC of the timing signal tpa is updated, the central processing unit 120 compares the count value TC with the count value TC of the portion storing the count value of the operation timing register TRMa,
If the comparison results match, that is, if the updated count value TC in the figure is "4", the delay time information T
Check m.

In the case shown in the figure, the delay time information is "1", which means to delay by 1/2 count (= 33 msec), so that the central processing unit 120 uses the programmable timer 127 (see FIG. 1) for 33 msec. To start counting. 33 programmable timer 127
When msec has elapsed, an interrupt signal indicating that fact is sent to the central processing unit 120.

When this signal is input, the central processing unit 120 executes the processing program corresponding to the operation timing register TRMa. With this configuration, adjustment is performed with a width of 1/2 count. In the above embodiment, the delay time information Tm is adjusted by the adjustment switch MSW6.
However, the count value TC and the delay time information Tm may be set in advance in the ROM 123a as basic timing data.

[0118]

As described above, according to the present invention, the operation time of the operation start timing and the stop timing, which is the basis of each operation section that requires the adjustment of the operation time of the packaging machine, is determined from the timing signal generating means. It is set digitally based on the count number of the timing signal, and the basic operating time is adjusted according to the packaging conditions of the package etc. to determine each operating time of each operating part. The effect is obtained.

(1) Since the basic operating time is adjusted according to the packaging conditions, the operating time of each operating part of the packaging machine can be easily set and adjusted.

(2) Since the operating time of each operating unit of the packaging machine is set and adjusted digitally based on the count number of the timing signal, the setting and adjustment are easier than the conventional analog setting and adjustment. Become.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control device for a packaging machine according to the present invention.

FIG. 2 is a plan view showing the structure of the packaging machine of the control device according to the present invention.

FIG. 3 is a vertical cross-sectional front view showing the structure of the packaging machine (viewed from the direction of arrow A in FIG. 2).

FIG. 4 is a vertical cross-sectional side view showing the structure of the packaging machine (viewed from the direction of arrow B in FIG. 2).

FIG. 5 is a plan view showing a film feeding / transporting mechanism of the packaging machine.

FIG. 6 is a side view showing a film feeding / transporting mechanism of the packaging machine.

FIG. 7 is a sectional view of a gripper mechanism of the packaging machine.

FIG. 8 is a sectional view of the gripper mechanism of the packaging machine (A in FIG. 5).
-A 'line sectional drawing).

FIG. 9 is an enlarged plan view showing the vicinity of a spu-kelot of the chain conveyor of the packaging machine.

FIG. 10 is an enlarged side view showing the vicinity of the sprocket of the chain conveyor of the packaging machine.

FIG. 11 is an enlarged front view showing the vicinity of the sprocket of the chain conveyor of the packaging machine.

FIG. 12 is a system diagram showing a drive system of the packaging machine.

FIG. 13 is a view showing a shape of a slit disk of the packaging machine.

FIG. 14 is a block circuit diagram showing a configuration of a timing detection unit.

FIG. 15 is a diagram showing a timing chart of the timing detection of the timing detection unit.

FIG. 16 is a diagram showing a configuration of a direction detection circuit.

FIG. 17 is a diagram showing a relationship between a timing signal, a direction detection signal, and a load state.

FIG. 18 is a diagram showing a configuration of an overload detection circuit.

FIG. 19 is a mechanical chart showing the operation of the front folding plate.

FIG. 20 is a diagram showing a shape of an adjustment switch.

FIG. 21 is a diagram showing a memory format of a ROM and a RAM.

FIG. 22 is a flowchart showing a part of the operation of the control device.

FIG. 23 is a diagram showing a memory format of a ROM.

FIG. 24 is a diagram showing a shape of an adjustment switch.

FIG. 25 is a diagram showing a shape of an adjustment switch.

FIG. 26 is a diagram showing a memory format of a RAM.

FIG. 27 is a diagram showing a relationship between a memory format of ROM and RAM and an adjustment switch.

FIG. 28 is a diagram showing the shape of an adjustment switch and the definition of its position information.

FIG. 29 is a diagram showing a storage format of an operation timing register.

[Explanation of symbols]

 120 Central Processing Unit 121 Operation Display Panel Unit 122 Timing Adjustment Unit 123 Storage Unit 124 Input / Output Control Circuit 125 Drive Control Unit 126 Timing Detection Unit 127 Programmable Timer 128 Package Size Detection Unit

Claims (3)

[Claims] 1. A film cut into a predetermined length is transferred by a transfer mechanism and stretched at a predetermined position of a packaging machine, and an object to be packaged carried in by a carry-in mechanism is pushed up from below the film by an elevator mechanism, A controller for a packaging machine that folds the left and right and front and rear ends of the film covering the upper part of the packaged object to the bottom of the packaged object by a folding mechanism, and drives the packaging machine. It is necessary to adjust the operation time of the operation start timing and the stop timing among the timing signal generating means for generating a timing signal in synchronization with the rotation of the main power unit, and the operation unit that repeats the operation and stop of the packaging machine. Basic timing data for storing the basic operating time of each operating unit as the count value of the timing signal from the timing signal generating means. Storage means, adjusting operation means for adjusting the basic operating time of each operating part, which is provided corresponding to each operating part requiring adjustment of the operating time, and each operating part is adjusted. The operation time data storage means for storing the operation time, the operation of each operation portion based on the count value indicating the basic operation time from the basic timing data storage means and the operation time adjustment amount from the adjustment operation means. Time is determined as the count value of the timing signal, the count value is stored in the operating time data storage means, and the timing signal from the timing signal generating means is counted to be stored in the count value and the operating time data storage means. The controller that compares the stored count value indicating the operating time of each operating unit and operates or stops the operating unit when the difference becomes 0 or a predetermined value. Packaging machine control apparatus characterized by comprising and. 2. The adjusting operation means has an adjusting operation means for manufacturer adjustment and an adjusting operation means for user adjustment, and the operation time data storage means is an operation time data storage means for manufacturer and a user operation. The operating time data storage means, the control means based on the count value indicating the basic operating time from the basic timing data storage means and the operating time adjustment amount from the adjusting operation means for manufacturer adjustment. The operating time of each operating part is determined as the count value of the timing signal, the count value is stored in the operating time data storage means for the manufacturer, and the operation of each operating part from the operating time data storage means for the manufacturer is determined. Based on the count value indicating time and the operation time adjustment amount of the adjustment operation means for user adjustment, the operation time of each operation unit is further determined by the tie time. Packaging machine control device according to claim 1 which is determined as a count value of the ring signal and to store the count value in the operating time data memory means for the user. 3. The operation time data stored in the operation time data storage means includes first operation time data represented by a count value of the timing signal and a timer time smaller than an interval time of the timing signal. 2, the control means compares the count value of the timing signal from the timing signal generating means with the count value of the first operation time data of each of the operating parts, and the difference is 0 or The control device for a packaging machine according to claim 1 or 2, wherein when the predetermined value is reached, the actuating unit is actuated after a lapse of a timer of the second actuation time data of the actuating unit.