JPS62146125A - Banding device for bag mouth - 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] 3. Detailed explanation of the invention 7.;:, l:”
<Industrial Application Field> The present invention is a flat vinyl string with a core wire such as a fine iron wire, commonly known as r.
This invention relates to a bag opening tying device in which the opening of a soft bag, such as a plastic bag containing bread, confectionery, etc., is twisted and tied with Vinitie (registered trademark).

<Prior Art> As a means of sealing the opening of a bag containing bread, confectionery, etc., instead of the conventional vinyl tape, binding using flat vinyl string containing thin iron wire, which is easy to unravel, has become mainstream. Various types of tying devices are available that automatically wrap the tying string around the bag opening, but the tying mechanism is complicated and timing is difficult to determine, which tends to cause malfunctions and breakdowns.

For example, a string twisting device in a binder disclosed in Japanese Utility Model Publication No. 56-52967 uses a diaphragm with a bag opening guide groove at one end as the drive source, and the bag opening is pressed to insert the diaphragm into the bag opening guide groove. A configuration is adopted in which gears that drive the string feeding mechanism, string winding mechanism, and twisting mechanism are independently engaged with fixed gears as the lowering rotation occurs. For this reason, not only does the entire device become large and have a complicated structure, but it is also troublesome to determine the timing for interlocking each mechanism, making it easy to cause malfunctions.

In addition, the tying work is often done by inexperienced part-time workers or amateurs in factories or retail stores, making it difficult to take corrective action in the event of a tying mistake, requiring maintenance, and the fact is that tying is not fully utilized. be.

<Problems to be Solved by the Invention> In view of the above-mentioned circumstances, the present invention provides an appropriate number of intermittent gears in which the driving sources of the string feeding mechanism, string cutting mechanism, string winding mechanism, and string twisting mechanism are disposed on the tll-axis; The purpose of the present invention is to provide a compact bag tying device that uses a mechanism such as a cam and does not cause malfunction.

Means for Solving the Problems> The present invention provides a drive shaft connected to a motor or the like at the base end of a flat frame body consisting of a pair of side walls having a bag opening guide groove at the tip. An intermittent gear for letting out the string, a cam for the string winding arm disposed outside the frame, and an intermittent face gear for twisting the string superimposed on the intermittent gear are coaxially integrated to form a drive mechanism, and the string recording. A friction wheel disposed on the shaft of the intermittent gear and a friction wheel opposite the friction wheel constitute a string feeding mechanism, and a shaft of a driven rod interlocked with the string winding arm cam is attached to the side of the bag opening guide groove. The base end of a vibrating arm, which has a front end winding movable claw portion and a rear end movable claw midway, is integrated into a bag opening string winding mechanism, and the pair of friction wheels is attached to the base of the vibrating arm. A string cutting mechanism consisting of a blade that slides and faces the end of the feeding groove is disposed, and the intermittent face gear for twisting the string is arranged on a line with the bag opening guide groove side, and the hooks at both ends are perpendicular to each other and have folding claws. A string twisting mechanism is created by meshing the pinion on the main shaft.

Function> Due to the above structure, a binding string made of a wire-containing flat vinyl string pulled out from a separate take-up reel is inserted between a pair of friction wheels in the flat frame. Here, the driving shaft is rotated by an appropriate means, and in conjunction with this, the binding string sandwiched between a pair of opposing friction wheels is paid out by the meshing thread of the intermittent gear for feeding out the string. After this, the cam for the string winding arm on the driving shaft rotates and rotates the driven rod, so the vibration arm, which rotates to a symmetrical position together with the driven rod, first rotates. A blade body that slides at an angle on the base cuts the binding cord to a predetermined length, and as the vibrating arm rotates, a movable claw portion at the front end of the tip is used to create a bag opening into which the bag opening is inserted in advance. As the guide groove is rotated, the movable claw part further winds and rotates under the regulation of the guide groove of the side frame, and the binding string whose front end is negotiated with the curved surface of the movable claw part wraps around the bag opening, and The rear end is locked by rotating and pressing the movable claw of the presser foot. At this time, the pinion of the orthogonal main shaft meshes with the intermittent face gear for twisting the string, and as a result of this rotation, the left and right folding claws at the tips hook the front and rear ends of the binding string, respectively, so that the binding string is twisted. In this way, when the bag opening is twisted several times with the binding cord and the bag is sealed, the bag is removed from the bag opening guide groove to complete the binding. Further, at this time, each of the intermittent gears, cams, and intermittent face gears return to their original positions with a predetermined displacement angle and wait for the next bundling.

<Example> Hereinafter, the present invention will be briefly explained with reference to drawings of an example.

1 is a pair of side walls 1 with a bag opening guide groove 2 orthogonally cut in the tip.
a, lb, and a driving shaft 3 connected to a motor etc. is provided at the base end of the flat frame 1 on the axis of the bag opening guide groove 2, and the driving shaft 3 is used for the motor. an intermittent gear 5 for feeding out a string, which has an arcuate cam 4 for opening the power supply on one side;
In addition to installing an intermittent face gear 6 for string twisting that overlaps with the gear 5, a driving shaft 3 protruding from the side wall lb on the back side is installed.
The cam 7 for the string winding arm is integrally attached to the drive mechanism 8.
shall be. In this case, the intermittent gear 5 and the intermittent face gear 6 are located in front of the front side wall 1a and interposed between the outer frame portion 10. A transmission gear 9 meshes with the intermittent gear 5 for feeding out the string, and a friction wheel 11 with a notched outer periphery is disposed between the side walls 1a and lb of the shaft 10 of the transmission gear 9.
A friction wheel 12 that comes into contact with is placed next to the string feed mechanism 13. In this case, one side of the transmission gear 9 has a static 11-river arc part 14, and the static part 14 is configured to slide on the 4 surfaces of the arcuate cam for power release integrated with the intermittent gear 5. . 15
is a driven rod whose lower end 15a faces the intermittent sliding position of the fan-shaped string winding arm cam 7;
'The vibrating arm 1 is installed in the gap a between the side walls 1a and 1b.
Integrate the base ends of 6. At the tip of this vibrating arm 16, the proximal end is pivotally attached, and a movable claw portion 17 is disposed at the front end.
A guide pin 18 protruding from the base end of the movable claw portion 17 is attached to the side wall 1a.
When the vibrating arm 113 further rotates from the end position of the circular groove 19, the movable claw portion 17
A bag opening string winding mechanism 21 is provided with a movable claw 20 for holding down the rear end of the binding string in the middle of the vibrating arm 18.
shall be. The guide pin 22 of the presser movable claw 20 is also guided in another arc groove 23, and when the vibrating arm 16 rotates from this end position, it further rotates due to the position restriction of the arc groove 23. Reference numeral 24 denotes an orthogonal main shaft having a pinion 25 at its base end that meshes with the gear surface of the intermittent face gear 6 for string twisting. A string twisting mechanism 27 is provided by arranging folding claws 28, 2f3 which are bent. Of course, the axis of this orthogonal main shaft 24 is on the same line as the 7-shaped groove 2a which is the center of the bag opening guide groove 2. Incidentally, reference numeral 28 indicates a cut-out window bored at the position of the orthogonal main shaft 24 of the side walls 1a and 1b, so that the folding claws 26 and 26 can rotate without any hindrance.

Next, to explain this operation, the entire device is placed on a support casing 30 that houses a motor 29 as shown in FIG. so that it rotates. In addition, a take-up reel 31 for a binding cord A made of a flat vinyl string containing wire is installed at the rear end of the support casing 30, and the binding cord A pulled out from the take-up reel 31 is placed sideways. The set flat frame body 1 is inserted through the opening 32 facing the side surface of the string payout mechanism 13, through the guide rollers 33, 33, and between the pair of friction wheels 11, 12 and kept on standby.

In this case, the friction wheels 11, 12 are separated by pressing a release lever 44 integrated with the shaft of one of the friction wheels 12,
It is possible to insert the binding string A.

Here, if the bag opening B' of the desired plastic bag B containing products such as confectionery or bread is inserted into the bag opening guide groove 2 in a crimped shape so that the bag opening B' is gathered together, the plastic bag B is brought close to the inner part of the bag opening guide groove 2. Then, the actuator 34a of the protruding start switch 34 is pressed to drive the motor 28. In this way, the transmission gear 9 is rotated by the gear part 58 width by the gear part 5a of the intermittent gear 5 for string feeding from the driving shaft 3 linked to the motor 29, and as a result, the pair of friction wheels are rotated. 11 and 12 are rotated for a predetermined amount to cause the binding string A to protrude by a predetermined length toward the vibrating arm 16 through the feeding groove 35 between the side walls 1a and lb. In this case, the tip of the binding string A is paid out to the front end winding movable claw portion 17.

Thereafter, the driving shaft 3 further rotates, the string winding arm cam 7 presses and rotates the driven rod 15, and the vibrating arm 16 integrated therewith is rotated toward the bag mouth guide groove 2 side. At this time, the blade 37 of the readout 181'r mechanism 38 provided at the base of the vibrating arm 16 slides on the slide surface 38 and cuts the binding string A in the feeding groove 35. A spring 39 is disposed on one side of the blade 37 to press the blade 37 at all times. In this state, if the vibrating arm 16 further rotates, the tip of the binding string A that has reached the movable claw portion 17 will straddle the bag opening guide groove 2 where the bag opening B' is located together with the movable claw portion 17. handed over to, and
At this time, the guide pin 18 below the pivot point of the movable claw portion 17 comes into contact with the end of the circular arc groove 19 and is regulated, but the vibrating arm 1
6 rotates, the movable claw portion 17 engages the spring 4 at the rear end.
0 and rotate around the pivot 41 so that the tip of the binding string A is wound around the bag opening B' (see FIG. 5). On the other hand, at this time, the rear end presser movable claw 20 in the middle of the vibrating arm 16
Since the guide pin 22 also comes into contact with the end of the arcuate groove 23 and is regulated, the presser movable claw 20 is also tilted sideways toward the bag opening guide groove 2.
Press down the rear end of the cut binding string A.

Next, the gear part of the intermittent face gear 6 for twisting the string meshes with the pinion 25 at the base end of the orthogonal moshaft 24 and is rotated.
A pair of folding claws 26, 26, which are bent in an S-shape as a whole, protruding from the tip of the orthogonal main shaft 24, are used to successively catch the front and rear ends of the binding string A, twist it several times, and then close the bag opening B'. Seal it.

In this way, when the bag opening B' is twisted a predetermined number of times, the actuator 42a of the release switch 42 is actuated in the cam groove 4a of the circular arc cam 4 for power release disposed on one side of the intermittent gear 5, and the power is turned off. On the other hand, the vibrating arm 16, which has been rotated sideways, returns to its original position by the return spring 43 and waits for the next bundling.

<Effects of the Invention> As described above, the bag opening tying device of the present invention has a multistage cam on the rotation source shaft, a cam for the string winding arm serving as an intermittent gear, an intermittent face gear for twisting the string, and an intermittent gear for feeding out the string. The string feeding mechanism, the bag opening string winding mechanism, and the string twisting mechanism are reliably interlocked with each gear and cam in sequence, so that there is no malfunction and accurate timing is obtained. In addition, a blade for cutting the fed-out binding cord is placed at the base end of the vibrating arm that constitutes the cord winding mechanism, creating a cord cutting mechanism. Since the fed-out binding string can be reliably cut and the next-stage binding string is continuously waiting in the feeding groove, the next binding string can be reliably fed out. Furthermore, since the front and rear ends of the predetermined length of the binding string facing the string twisting mechanism are pressed by the movable claws at the tip and base end of the vibrating arm, engagement with the folding claws for twisting is ensured, which prevents forgetting to wrap the string. It has an effect such as temporary effect.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view;
Fig. 2 is a rear view, Fig. 3 is a plan view showing the inside, Fig. 4 is a side view showing the relationship between the intermittent gear for feeding out the string, the cam for the string winding arm, and the intermittent face gear for twisting the string, and Fig. 5 is an explanatory diagram of the operating state of the vibrating arm, Figures 6A and B are explanatory diagrams of the bag mouth twisting operation, Figure 7 is a front view showing the displacement position relationship of each intermittent gear and cam, and Figure 8 is for string feeding. FIG. 9 is a perspective view of the intermittent gear and transmission gear in use. ■...Flat frame body, 2...Bag opening guide groove 3...
Drive source shaft, 5...Intermittent gear for string feeding, 6.
... Intermittent face gear for string twisting 7φ... Cam for string winding arm, 8... Drive mechanism, 9... Transmission gear 11.
12... Friction wheel, 13... String feeding mechanism 15...
・Following rod, 16... Vibration arm 17... Front end winding movable claw part, l8... Guide pin, 19... Arc groove 20
... Rear end presser movable claw part, 21 ... Bag opening string winding mechanism, 22 ... Guide pin 23 ... Arc groove, 24 ... Orthogonal main shaft 25 / fist / pinion, 26.2
6.So folding claw 27...Patent applicant for the string twisting mechanism Yoshiaki Tanshita Akido Tanshita Fumiko Tanshita Atsuko Kawamura Figure 1);', 'knee f': No change in content) Figure 4 Figure 2 Figure 3 Figure 5 1h 6m Figure 7 Figure 8 Figure 9 Procedural amendment date March lLf, 1986

Claims (1)

[Claims] 1. A driving shaft is provided at the base end of a flat frame body with a bag mouth guide groove arranged at the tip, and an intermittent gear for string feeding, a cam for the string winding arm, and an intermittent face gear for twisting the string are integrated into the driving shaft. A string feeding mechanism consisting of a shaft-mounted drive mechanism, a pair of friction wheels interlocked with the intermittent gear for string feeding, and a movable front winding claw at the tip of a driven rod that is linked to the string winding arm cam. A bag opening string winding mechanism includes a vibrating arm with a movable rear end presser claw in the middle of the bag end, and a string cutting mechanism in which a blade slides onto the end of the feeding groove of the pair of friction wheels at the base of the vibrating arm and faces the string cutting mechanism. A bag opening tying device characterized in that it comprises a string twisting mechanism and a string twisting mechanism having folding claws protruding in symmetrical positions from the tips of orthogonal main shafts having pinions that mesh with the intermittent string twisting face gear.