JPH11227722A - Start control device of bag binding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the handling property of a bag binding machine. SOLUTION: A photo interrupter 27 to detect presence/absence of a connection type binder is provided on a binder passage of a bag binding machine, and connected to a motor control part. The photo interrupter 27 is located at the eighth binder 9h from the top binder on a binder guide 17. The motor control part makes a count every time the action of one cycle is performed after seven binders are left behind, and the ON signal is outputted from the photo interrupter. No binders are left when the count value is seven, and the start of the motor is prohibited at this point. When a binder for replenishment is charged in the binder guide 17, the output of the photo interrupter is turned off to release the start prohibition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a start-up control device for a bag binding machine for binding resin bags for packaging food or the like, and more particularly, to a start-up control for judging the presence or absence of a binding device and performing a start / stop control. It concerns the device.

[0002]

2. Description of the Related Art For example, in order to quickly and surely bind an opening of a resin bag storing goods such as fruits and vegetables and bread, the applicant of the present application automatically tightens a binding device of a resin plate to a converging portion of the bag. Bag binding machine to wear (Japanese Utility Model Application No. 5-49916, Japanese Patent Application No. 8-26)
No. 7542).

[0003] The above-mentioned bag binding machine incorporates a binding device feeding device and a binding device in a frame, and connects a bag binding portion to a bag insertion guide groove formed from one side of the frame toward the center. When inserted, the motor is activated by the trigger switch. Then, the motor drives the carrier of the tying device feeding device forward from the standby position via the main gear and the cam mechanism, and fits the double tying device into the converging portion of the bag. Multiply (Japanese Utility Model Application No. 5-49916) or
Alternatively, both legs are crossed and joined by punching and caulking (Japanese Patent Application No. 8-267542). In addition, a surplus portion of the bag above the binding device fastening portion is cut by a cutter device that works in conjunction with the binding device.

[0004]

A conventional bag tying machine automatically starts when a tying portion of a sack is inserted into a guide groove, and comprises one cycle of feeding and fastening of a tying tool and cutting of the sack. Although the operation is performed, the bags are not bound in a cycle after the use of the connected tying device loaded in the feeding device, and the upper portion of the bags is cut by the cutter device.

At this time, the operator knows that the connection-type tying tool has been used up, and resupples the tying tool with the tying machine and resumes the work. However, the upper part was cut off without the tying tool being attached. The bags cannot be bound because there is no portion to be gripped during the binding operation. Therefore, there is a problem that it takes time to transfer the contents of the bag to a new bag, and when the contents are a fluid, the contents fall out of the bag and become wasteful.

Therefore, there arises a technical problem to be solved in order to prevent the bag from being cut when the remaining amount of the tying tool becomes zero and to improve the handleability, and the present invention solves the above problem. The purpose is to solve.

[0007]

DISCLOSURE OF THE INVENTION The present invention proposes the above-mentioned object, and more particularly, a tying member for externally fitting a connecting tying member, which is a gate-shaped flat plate made of synthetic resin, to a converging portion of a bag. A trigger device comprising: a feeding device, a binding device that presses and intersects both legs of the binding device in the closing direction to cross or crimp the two legs, and a cutter device that cuts an upper excess portion of a binding portion of the bag; In a bag binding machine that performs one cycle of binding operation by a trigger signal of a switch, a sensor for detecting the presence or absence of a binding device is provided in a supply passage of the connecting type binding device, and the end of the connecting type binding device determines the position of the sensor. Means for counting the number of binding cycles from the time when the output of the sensor is inverted after passing, and the number of binding tools remaining in the feeder at the time when the output of the sensor is inverted matches the binding cycle count value. There is provided a startup control device of a bag tying machine constituted by a control means for prohibiting the startup of the motor at the time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a bag tying machine 1 and a right side thereof is a tying tool magazine portion 2 on which a roll of tying tools connected in a belt shape is accommodated. A flat L-shaped guide groove 4 is formed on the table portion 3 projecting leftward from the binding tool magazine portion 2 to bend leftward from the front left / right intermediate portion and then leftward. Guide groove 4 in table part 3
On the right side, a tying device feeding device 5 is incorporated, and on the left, a tying device 6 is incorporated.

A cutter device 7 is disposed behind the binding device 6, and an arm portion 7a rotatably pivotally mounted on the upper surface of the table portion 3 is rotated to the front side to move the front guide groove 7b to the table. If it is matched with the guide groove 4 of the portion 3, a cutter blade (not shown) that slides back and forth in the arm portion 7a in conjunction with the binding operation cuts off the upper excess portion of the bound bag.

The feeding device 5, the binding device 6, and the cutter device 7
Is driven by one motor (not shown) via a reduction gear mechanism, a cam and a link mechanism. A trigger lever 8 is pivotally mounted on the left side of the guide groove 4, and the distal end of the trigger lever 8 extends rightward and crosses the guide groove 4, converges at the opening of the bag and is located at the back of the guide groove 4. Then, the trigger lever 8 is pushed by the bag and rotates, a trigger switch (not shown) in the table section 3 is turned on, and the motor is started.

As shown in FIG. 2, the tying member 9 is a substantially gate-shaped resin flat plate, and a retaining claw portion 11 is provided on the inner base of the left and right legs 10 in the form of an internal gear. Both legs 1
0 has a hole 12 for engaging a pin of an arm of the feeding device 5 described later, and a groove 13 extending from the outer surface to the inner front is provided at a tip portion, and a hook portion 14 is formed. . Then, a roll of an integrally formed product in which a number of binding tools 9 are connected in a line in a belt shape is loaded into the binding tool magazine 2 of the bag binding machine 1.

FIG. 3 shows the arrangement of the feeding device 5 and the binding device 6, and as shown in FIG. 3, a carrier 16 is slidably engaged with a carrier guide 15 provided on the base of the bag binding device 1, and 16 advances the binding device 6 toward the binding device 6 and externally fits the binding device 9 into the bag. The binding device 9 mounted on the bag is fastened by the binding device 6.

A tying member guide 17 mounted on a carrier 16 of the feeding device 5 so as to be slidable back and forth comprises an upper case and a lower case, and a gap between the upper case and the lower case is of a middle height (shape in cross section). It is a tie passage. A binding device table 18 similar in shape to the binding device 9 is formed at the front part (left side in the figure) of the binding device guide 17, and the binding device 9 supplied forward through the binding device passage is exposed on the binding device table 18.

A pair of left and right C-shaped binding arms 19 are coaxially pivoted behind the binding table 18 so that the binding arms 19 are provided.
The arm shifter 20 and the binding arm 19 slidable back and forth are connected by a link 21. A vertical pin 22 protrudes from the distal end of the binding arm 19, and the pin 22 engages with the holes 12 on both sides of the binding tool 9 shown in FIG. Further, a pin 16 a fixed to the carrier 16 is engaged with a groove 20 a provided in the arm shifter 20.

A large-diameter main gear 23 is provided below the carrier 16.
And a cam groove 16b formed in the rear portion of the carrier 16 by a crank roller 24 provided near the outer edge of the main gear 23.
And the main gear 23 has a plurality of reduction gears (not shown).
Through a motor.

Although not shown, a known feeding claw mechanism (not shown) using a swinging claw is interposed between the carrier 16 and the tying member guide 17, and the feeding is pivotally attached to the tying member guide 17. The pawl engages the carrier 16 and the tying member guide 17 is pushed by the carrier 16 and advances with the carrier 16. When the tying member guide 17 comes into contact with the stopper and stops after a predetermined distance, the feed pawl separates from the carrier 16 and the carrier 16 and the arm shifter 20 move.
Is further advanced, and the pair of left and right binding arms 19 are pushed by the arm shifter 20 and rotate in the closing direction.

A disk 25 provided with a notch 25a is fitted on the shaft of the main gear 23, and the light emitting part and the light receiving part of the photo interrupter 26 fixed to a frame (not shown) are connected to the disk 25.
Are vertically opposed to each other with the outer edge portion of. The photo interrupter 26 is connected to a motor control unit (not shown), and the motor control unit controls the stop position of the carrier 16 based on the output of the photo interrupter 26.

As shown in FIG. 4, the tying tool path from the tying tool magazine 2 of the bag tying machine 1 to the tying tool introduction port 17a of the tying tool guide 17 through above the main gear 23 and the carrier 16 includes: A photo interrupter 27 for detecting the presence / absence of the binding tool 9 is provided and connected to the motor control unit. The light emitting portion and the light receiving portion of the photo interrupter 27 face each other above and below the side edge portion of the binding device 9, and when the binding device exists between the light emitting portion and the light receiving portion, the output of the light receiving portion is turned off. When there is no binding device, an ON signal is output.

The photointerrupter 27 is connected to the first binders 9a to 8 on the binder table 18 of the binder guide 17.
At the position of the leg of the 9th binding device 9h, when the binding device is sequentially sent forward and the remaining amount becomes seven, the binding device between the light emitting unit and the light receiving unit disappears, and the ON signal is output. Will continue.

The motor control unit includes a photo interrupter 27
When the ON signal of has continued for a predetermined time or more, the down-count data = 7 is set in the counter. Thereafter, each time the trigger signal of the trigger switch is input, 1 is subtracted from the count data, and when the count data becomes 0,
Inhibit starting the motor.

Next, the operation of the bag binding machine 1 will be described. Fig. 1 While bundling the upper end opening of the resin bag filled with fruits and vegetables by hand
When the trigger lever 8 is pushed by the bag and turns, the trigger lever 8 turns on the trigger switch in the table section 3 to start the motor.

When the main gear 23 is rotated by the motor,
The carrier 16 is pushed by the crank roller 24 shown in FIG.
In addition, the binding device guide 17 moves forward. Since the leading tying member of the connecting type tying member 9 is engaged with the pin 22 of the tying arm 19, the leading tying member advances with the tying member guide 17 and is fitted to the converging portion of the bag. At this time, although not shown, a cutter mounted on the upper surface of the tying tool guide 17 cuts the connecting portion between the first tying tool and the next tying tool as in the conventional bag tying machine.

Then, at a position where the tying tool on the tying tool table 18 of the tying tool guide 17 enters the front portion of the tying device 6, the feeding claw of the tying tool guide 17 comes off the carrier 16 and the tying tool guide 17 stops. Then, the carrier 16 and the arm shifter 20 further advance. As a result, the pair of left and right binding arms 19 pivotally attached to the binding device guide 17 rotate in the closing direction to cross both legs of the leading binding device 9, and as shown in FIG. It elastically deforms like a funnel. At this time, the press pins of the binding device 6 are located immediately below both legs 10 of the binding device 9.

Since the structure of the binding device 6 is known, a detailed description thereof will be omitted. However, the plate on which the punch is erected and the upper die plate provided with the pin holes, which are dies, are bound by the binding device 9.
By pressing both legs 10 from above and below, a dowel is formed at the intersection of both legs, and a caulking plate provided with caulking pins caulks the dowel from above the pin hole.

FIG. 6 (a) shows the shape of a dowel D formed by a punch and a die, and FIG. 6 (b) shows the final shape of the dowel D which has been swaged by a swage pin. Also,
FIG. 7 shows a state in which the binding device 9 is fastened to the bag B.

Then, the upper and lower plates of the binding device 6 are opened and returned to the standby position, and after the carrier 16 has retreated a predetermined distance, the guide feeding claws of the binding device guide 17 are moved to the carrier 15.
And the binder guide 17 retreats integrally with the carrier 16, and the notch 25 a of the disk 25 coaxial with the main gear 23 reaches between the light emitting portion and the light receiving portion of the standby position detecting photointerrupter 26. Then, in response to the ON signal of the photo interrupter 26, the motor control unit starts braking the motor and enters a deceleration stroke. Then, when the notch 25a comes out from between the light emitting portion and the light receiving portion of the photo interrupter 26 and the ON signal of the photo interrupter 26 is turned off, the electromagnetic brake is applied to the motor and stops at the standby position shown in FIG.

Consuming the connecting type tying tool with the tying work,
The motor control unit starts counting the binding cycle when the last binding device of the connecting type binding device 9 passes through the position of the photointerrupter 27 and the remaining number of the binding devices becomes seven. Then, when seven cycles have been counted, that is, when the remaining amount of the tying member 9 has become zero, the control enters a control for inhibiting the motor from starting. Therefore, even if the worker inserts the bag into the guide groove 4 of the bag binding machine 1 and the trigger switch is turned on, the bag binding machine 1 does not start, and it is understood that the binding device has been used up and the user holds the bag. The bag is not cut.

Then, when the operator loads the connecting type tying tool into the tying tool magazine section 2 and inserts the leading end of the connecting type tying tool through the tying tool guide 17 to the tying tool table 18,
The output of the photointerrupter 27 is turned off by the eighth tying member 9h from the beginning, the activation prohibition state is released, and the tying operation can be resumed.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made within the technical scope of the present invention, and the present invention naturally extends to those modified ones.

[0030]

As described above, the activation control device for a bag binding machine according to the present invention does not activate even if the trigger switch is turned on when the connection type binding device loaded in the bag binding machine runs out. Therefore, unlike the conventional bag binding machine, the upper portion of the bag is not cut by the cutter device. Therefore, the bag and the product are not wasted, the handleability is improved, and a decrease in work efficiency can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bag binding machine according to an embodiment of the present invention.

FIG. 2 is a front view of the binding device.

FIG. 3 is a plan view showing a feeding device and a binding device of the bag binding device.

FIG. 4 is a plan view of the feeding device.

FIG. 5 shows a bending shape of a binding device by a feeding device;
(A) is a plan view and (b) is a front view.

FIG. 6A is a cross-sectional view showing a shape of a dowel formed by a binding device, and FIG. 6B is a cross-sectional view showing a shape obtained by caulking the dowel in the next step of FIG.

FIG. 7 is a front view of the bag showing a state of binding by the bag binding machine of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag binding machine 2 Binding tool magazine part 3 Table part 4 Guide groove 5 Feeding device 6 Binding device 7 Cutter device 8 Trigger lever 9 Binding tool 10 Leg 11 Claw part 12 Hole 14 Hook part 16 Carrier 17 Binding tool guide 18 Binding tool Table 19 Binding arm 20 Arm shifter 21 Link 22 Pin 23 Main gear 27 Photo interrupter

Claims (1)

[Claims] 1. A tying tool feeding device for externally fitting a connecting tying tool, which is a gate-shaped flat plate made of a synthetic resin, to a convergence portion of a bag, and both legs of the tying tool are pressed in a closing direction to cross each other. A binding device that includes a binding device that crosses or crimps a portion and a cutter device that cuts off the upper surplus part of the binding portion of the bag, and performs a one-cycle binding operation by a trigger signal of a trigger switch. Means for providing a sensor for detecting the presence or absence of the binding device in the supply passage of the binding device, means for counting the number of binding cycles from the time when the output of the sensor is inverted when the end of the connection type binding device passes the position of the sensor, Start of the bag binding machine constituted by control means for prohibiting the start of the motor when the number of binding tools remaining in the feeder and the binding cycle count value match when the output of the sensor is inverted. Control device.