JPH092426A - Bag-holding device for binding machine - Google Patents

Abstract

PURPOSE: To provide a binding device which makes it possible to automatically squeeze a bag at the opening and to bind the bag at the opening always firmly and in a stabilized state in quality of the results even when the size of the bag changes. CONSTITUTION: A bag-pressing device 100A for a binding machine for binding a flexible bag at its opening has a base plate 210, a feeding device for drawing out a binding cord 300, and a twister to do the binding with the binding cord 300 and cut it at a specified length. The device furthermore has a link 10, one end of which is connected to a rotatable disk 11 and the other end has a connecting pin 12, and a binding cord- guiding plate 30 which is connected to the connecting pin 12 of the link 10 on the one hand and a pivot 20 on the base plate 210 on the other hand. Furthermore, there are provided a bag-pressing plate 40 which is supported coaxially with the binding cord-guiding plate 30 by the pivot 20 and has at the forward end a holding groove for the bag at its opening, a long hole 43 curved in an arc which is formed in the bag-pressing plate 40 and through which a connecting pin 12 of the link 10 is passed, and a spring 50 which is interposed between the bag-pressing plate 40 and the base plate 210 and exerts a force on the bag-pressing plate 40 toward a guide groove 211.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag holding device applied to a binding device for binding a bag opening of a flexible bag such as a plastic bag containing bread, confectionery and the like with a binding string. is there.

[0002]

2. Description of the Related Art Various types of binding devices of this type have been proposed. For example, Japanese Patent Publication No. 63-62416 discloses a "string feeding mechanism, a string cutting mechanism, a string winding mechanism,
An object of the present invention is to provide a compact bag mouth binding device that does not cause a malfunction as a mechanism that employs an appropriate number of intermittent gears, cams, etc., in which the drive source of the string twisting mechanism is arranged on a single shaft. A mouth tying device "has been proposed.

According to the conventional binding device described in the claims of the above-mentioned publication, "a flat binding cable in which a core wire such as a metal wire is embedded is fed out by a predetermined length, cut, and hanged over a bag opening. In the bag mouth bundling device provided with a folding claw that rotates while scooping the binding cord end, the bag mouth guide groove 2 of the flat frame 1 composed of a pair of side walls 1a and 1b having a bag mouth guide groove 2 formed at the tip A drive source shaft 3 is provided at a base end which is on the same line as the axis of, and an intermittent gear 5 for pulling out a cord in which a power supply opening arc cam 4 is arranged on one surface on the front side of the drive source shaft 3; And the pinion 25 at the base end of the orthogonal main shaft 24 having a folding claw 26 at the tip is engaged with the intermittent face gear 6 for twisting the cord. The cord winding arm cam 7 is integrally attached to the back side, A driven rod 15 with its lower end facing the intermittent rotation position of the only arm cam 7 is swingably provided. A sliding arm 16 having a movable claw 20 is pivotally connected, and the intermittent gear 5 for pulling out the cord is meshed with a transmission gear 9 having a cut-out arc portion 14 for rest. And a sliding device having a structure in which one of a pair of friction wheels 11, 12 is axially mounted coaxially with the transmission gear 9 ". As shown in FIG. 22, the object has been achieved.

However, Japanese Patent Publication No. 63-6241
No. 6 discloses a binding device disclosed in column 5
According to the description from the third line onwards, when performing the bundling work, the condition is that "if the bag opening of the bag containing the products such as confectionery and bread is inserted into the bag opening guide groove as a squeezed shape" Is what it is. In other words, in this binding device, it is a condition that the bag mouth to be bound is narrowed down to a certain extent by hand and the like, and that the state is maintained until the binding is completed. It is what you need.

[0005] Further, if it is attempted to narrow down the bag mouth manually, the amount of narrowing is naturally different, and it becomes difficult to bind a large number of bags in a stable state and quality. is there. In addition, if the size of the bag changes, the force when squeezing and inserting it into the "bag opening guide groove" must also be changed, and if you are not used to it, you will not be able to tightly bind the bag opening .

On the other hand, as a binding cord used in this type of binding machine, a binding cord made of a synthetic resin having a core made of a thin metal wire such as an iron wire is generally used. Since the thin metal wire may be a hindrance, a binding string made of a synthetic resin that does not use the thin metal wire at all is increasingly used in recent years. Since the binding string made of synthetic resin has a high elasticity, it must be firmly held down at the time of binding by a binding machine. Otherwise, only very loose binding can be performed.

The inventor of the present invention is capable of performing the binding of the bag mouth with a stable quality, and how to make the binding quality stable even if the size of the bag changes. As a result of various studies on the above, the present invention was completed.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned situation in a bag-and-mouth tying device of this kind,
The problem to be solved is further automation of the binding and improvement of the binding quality.

That is, the object of the present invention is to
An object of the present invention is to provide a binding device that can automatically narrow down a bag mouth and can always firmly bind the bag mouth with stable quality even if the size of the bag changes.

[0010]

Means for Solving the Problems In order to solve the above problems, means according to the first aspect of the present invention will be described with reference numerals used in the embodiment. A substrate 210 having a guide groove 211 for guiding a bag opening Wa of the flexible bag W to be bound; a feeding device 220 provided on the substrate 210 side for leading the binding string 300 near the guide groove 211; A bundling unit that includes a bundling strap 300 wound around the bag opening Wa guided into the groove 211 and a twister 230 that performs cutting of a predetermined length to bind the bag opening Wa of the flexible bag W. 10A is a bag holding apparatus 100A for a machine 200, which has a link 10 having one end connected to a rotating disk 11 and a connecting pin 12 at the other end.
And a binding string guide plate 30 which is connected to the connecting pin 12 of the link 10 and is also connected to the pivot 20 on the substrate 210 side, and the tip of which is coaxially supported by the binding string guide plate 30 and the pivot 20 A bag holding plate 40 having a holding groove 41 for a bag opening Wa, an arc-shaped long hole 43 formed in the bag holding plate 40 and engaging the connecting pin 12 on the link 10 side, A spring 5 interposed between the plate 40 and the substrate 210 to urge the bag holding plate 40 toward the guide groove 211.
And a bag holding device 100A for the binding machine 200, which is provided with a "0".

That is, the bag holding device 100A is provided with a flexible bag W inserted into the guide groove 211 of the substrate 210 by the bag holding plate 40 supported coaxially with the binding string guide plate 30 by the pivot 20. The bag mouth Wa is firmly pressed against the inner end of the guide groove 211, and the pressing force at that time is ensured by a (tensile) spring 50 interposed between the bag holding plate 40 and the substrate 210. It was made. Further, the cooperation between the bag holding plate 40 and the binding string guide plate 30 is performed by the connection pin 12 on the link 10 side.
Are directly connected to the binding string guide plate 30, and a part of the connecting pin 12 is formed in a slot 43 formed in the bag holding plate 40.
The slot 4
The bag holding plate 40 is delayed with respect to the return of the binding string guide plate 30 within the range of 3, so that the pressing of the bag opening Wa by the bag holding plate 40 is performed by the flexible bag W.
Is maintained until the unity by the above is sufficiently completed.

[0012] In order to solve the above-mentioned problems, a means according to the second aspect of the present invention provides a method for guiding a bag opening Wa to be bound of a flexible bag W containing stored items. A substrate 210 having a guide groove 211; a feeding device 220 provided on the substrate 210 side for leading a binding string 300 near the guide groove 211; and a bag mouth W guided in the guide groove 211.
A bag holding device 100B for a binding machine 200 that includes a twister 230 that binds the binding strap 300 wound around the periphery of the flexible bag W and cuts a predetermined length, and binds the bag opening Wa of the flexible bag W. A carriage 60 having a pinion 213 meshing with a rack 212 formed on the substrate 211 and reciprocating with respect to the substrate, and is provided on the carriage 60 so as to be rotatable about a pivot 20. Gear 2 on lever axis 20
1, a binding string guide plate 30 that rotates in conjunction with the pinion 213, and a holding portion 42 for the bag mouth Wa that is coaxially supported by the binding string guide plate 30 and the pivot 20 at its tip.
And a spring 50 interposed between the respective ends of the bag holding plate 40 and the binding string guide plate 30 to urge the two to expand. Bag holding device 100B for the binding machine 200 ".

That is, the bag holding device 100B according to the second embodiment is suitable for performing binding when the bag mouth Wa is relatively large, and the bag holding device 100A according to the first embodiment is used. In the same manner as in
10 is provided with a binding string guide plate 30 and a bag holding plate 40 coaxially supported by the binding string guiding plate 3.
During the reciprocating movement of the carriage 60 supporting the first and second bag holding plates 40, the gear 21 on the binding string guide plate 30 side
The binding strap guide plate 30 and the bag holding plate 40 are rotated toward the guide groove 211 by being rotated by the pinion 213 meshing with the rack 212 on the 0 side.

[0014]

Next, the operation of the bag holding devices 100A and 100B according to the respective claims will be described while sequentially following the operation thereof.
Is operated by being attached to the binding machine 200 shown in FIGS. 1 to 4. First, the operation of the binding machine 200 will be described.

As shown in FIGS. 1 to 4, the binding machine 200 has a cover 210 wrapped around a substrate 210 which is horizontally arranged at the upper end thereof, and a feeder 220 incorporated in the upper part thereof. Thus, the binding string 300 on the reel arranged on the rear side in the drawing is sequentially pulled in. Of course, a guide groove corresponding to the guide groove 211 is also formed on the side of the substrate 210 on the cover enclosing the substrate 210, and the detecting mechanism 70 is formed in the guide groove as shown in FIG. The claw 72 of the inserted detection lever 71 is facing. Further, as shown in FIG. 3, a twister 23 is provided in front of the guide groove of the cover.
The tip of 0 is facing.

As shown in FIGS. 5 and 10, the feeder 220 is disposed on the substrate 210 and has a pair of pinch rollers 221 driven to rotate rightward by a drive motor 81. The binding string 300 sandwiched between the pinch rollers 221 is sent out by the guide rail 222 as shown by the imaginary line in FIG.

As shown in FIGS. 5 and 11, the twister 230 has a front end facing the inner end side of the guide groove 211, and has a predetermined amount by a driving motor 82 provided at the rear end of the substrate 210. It rotates. That is, as shown in FIG. 12, for example, the twister 230 has a groove in which the binding string 300 is always inserted,
And a binding string 3 wound around the bag mouth Wa of the flexible bag W by this arm.
00 at the tip and folded in two
Is twisted to bind the bag opening Wa. Then, the twister 230
Is cut to a predetermined length, and then the above-mentioned binding is performed.

The above-described feeder 220 and twister 23
The operation of “0” is controlled by the detection mechanism 70 provided on the substrate 210 and by a switch or the like (not shown). In particular, the feed device 220 is driven by the clockwise rotation of the drive motor 81. 5 and FIG.
3 and controls the operation of the feed device 220 based on the detection of insertion of the flexible bag W into the guide groove 211 or discharge from the flexible bag W. It is. That is, when the bound flexible bag W is taken out from the guide groove 211, the detection mechanism 7
The zero insertion detection lever 71 returns to the state shown in FIG. 13 by the action of the spring 73, whereby the switch 74 is operated, and a signal is issued to the feeder 220 side. Feeder 22 receiving this signal
In the case of 0, as described above, the binding string 300 is sent out by a predetermined length, and the next binding by the binding string 300 is awaited.

Further, in the guide groove 211 before the flexible bag W for binding the bag mouth Wa is inserted, as shown in FIGS. 2, 5 and 13, a detection mechanism 70 is constituted. The claw 72 of the inserted detection lever 71 is exposed. Accordingly, when the bag mouth Wa is inserted into the guide groove 211, the claw 72 is operated, and the next bag holding device 100A or 10A is operated.
0B, and a signal for starting the operation of the twister 230.

The insertion detecting lever 71 of the embodiment is
As shown in FIG. 13 and the like, a pressing portion 75 is formed at a portion outside the claw 72, and the claw 72 is formed by the bag mouth Wa.
Is pressed, the pressing portion 75 comes around behind the bag mouth Wa. In other words, the pressing portion 75 presses the bag opening Wa to a certain extent, and the bag holding plate 4 of the next bag holding device 100A or 100B.
It assists the operation of 0.

The operation of the bag holding apparatus 100A according to the first aspect will now be described.
0 is provided with a bag holding device 100A according to claim 1 as shown in FIGS. 5 to 9, and this bag holding device 100A operates as follows.

That is, as described above, the guide groove 211
When the bag mouth Wa is inserted into the inside, the switch 74 of the detection mechanism 70 is operated, whereby the drive motor 81 drives the disk 11 counterclockwise (in this embodiment, one rotation). During one rotation of the disk 11, the binding string guide plate 30 and the bag retaining plate 40 that constitute the bag holding apparatus 100A of the present invention are wound with the binding string 300 around the bag opening Wa as follows. , And the bag mouth Wa is pressed against the guide groove 211.

First, looking at the binding string guide plate 30, the turning power of the disk 11 is transmitted to the binding string guide plate 30 via the link 10 as reciprocating motion.
Thus, the binding string guide plate 30 reciprocates within a predetermined range around the pivot 20. The turning of the binding string guide plate 30 is such that the maximum clockwise position is the position shown in FIG. 5, while the maximum counterclockwise position is the position shown in FIG. String guide plate 3
Numeral 0 reciprocates between these.

By the way, before the binding string guide plate 30 starts rotating, the leading end of the binding string 300 is sent out by the above-mentioned feeding device 220 as shown by a virtual line in FIG. When the binding string guide plate 30 rotates, the tip of the binding string 300 is inserted into the string holding groove 32 formed at the tip of the string feeding arm 31 as shown in FIG. Is locked. When the binding strap guide plate 30 rotates, the bag mouth Wa of the flexible bag W is located at the inner end of the guide groove 211. String 300
Is wound around the bag mouth Wa.

When the binding string guide plate 30 is rotated from the position shown in FIG. 5 to the position shown in FIG. 7, the bag holding plate 40 provided coaxially with the pivot 20 is as follows. In this case, the bag mouth Wa of the flexible bag W is pressed. In the binding machine 200 of the embodiment, as described above, the bag opening Wa is also pressed by the insertion detection lever 71 of the detection mechanism 70, and the pressing operation by the bag holding plate 40 is more effective. It is something that can be done.

The bag holding plate 40 is attached to the base plate 210 coaxially with the binding string guide plate 30 by means of the pivot 20. As with the binding string guide plate 30, the bag presser plate 40 reciprocates around the pivot 20. It is something to do. The reciprocating rotation of the bag holding plate 40 is not the same as that of the binding string guide plate 30 due to the following action, and the reciprocating rotation range also changes according to the size of the bag opening Wa of the flexible bag W. It is gaining.

First, when the bag mouth Wa of the flexible bag W is small, that is, as shown in FIG. 7, the outer end of the holding portion 42 of the bag holding plate 40 and the inner end of the guide groove 211 on the substrate 210 side. In the minimum holding space 90 formed by the bag opening Wa.
When the link 10 is completely accommodated, the link 10 starts pushing the binding cord guide plate 30 from the state shown in FIG. 5 to the left in the figure, and then pushes it to the maximum left rotation position shown in FIG. In addition, the bag pressing plate 40 rotates counterclockwise together with the binding string guide plate 30 by the action of the spring 50. At this time, the connecting pin 12 connecting the link 10 and the binding string guide plate 30 comes into contact with the elongated hole 43 on the bag holding plate 40 on the right side in the drawing as shown in FIG. ing.

Here, when the binding string guide plate 30 reaches its maximum left position (the state shown in FIG. 7), the binding string guide plate 30 stops temporarily. When the plate 40 further rotates and the bag opening Wa is small, the bag holding plate 40 rotates to, for example, the position shown in FIG. At this time, since the holding space 90 is the smallest as described above,
The bag opening Wa of the flexible bag W is firmly pressed by the holding portion 42 of the bag holding plate 40 and the inner end of the guide groove 211.

In other words, even when the bag mouth Wa of the flexible bag W is widened, this bag mouth Wa is pressed against the inner end side of the guide groove 211 by the pressing portion 42 of the bag pressing plate 40. Therefore, the amount of the bundling cord 300 for bundling the bundling cord 300 is reduced and the bundling by the bundling cord 300 can be performed without loosening, and the quality of the bundling by the twister 230 described above is improved. The above operation is realized only by the binding string guide plate 30.
A separate bag holding plate 40 is used, and the bag holding plate 40 is urged in the binding direction by a spring 50, and the binding string guide plate 30 is connected to the elongated hole 43 and the connecting pin 12 which is in contact with the elongated hole 43. This is because they are interlocked with each other. Of course, since the string feed arm 31 on the side of the binding string guide plate 30 turns around the outside of the holding space 90 formed by the holding portion 42 of the bag holding plate 40 and the inner end of the guide groove 211, Needless to say, the binding string 300 can be sufficiently wound around the bag opening Wa which is small in the space 90.

It is important to note that when the binding strap 300 starts binding the bag mouth Wa, the link 10 further rotates, and the binding strap guide plate 30 rotates rightward from the position shown in FIG. The connecting pins 12 connecting the binding string guide plate 30 and the link 10 only move rightward in the elongated hole 43 of the bag holding plate 40 shown in FIG. Therefore, the bag holding plate 40 is not rotated until the connecting pin 12 comes into contact with the right end of the elongated hole 43. In other words, while the bag mouth Wa is being bound by the binding string 300, the bag mouth Wa is kept pressed by the holding portion 42 of the bag holding plate 40 that is urged to rotate counterclockwise by the spring 50. That is, it is held in the holding space 90. Therefore, the binding by the binding string 300 is performed without loosening the bag opening Wa, and the return of the binding string guide plate 30 to the original position (the position shown in FIG. 5) is performed during this time. This can be performed without adversely affecting the pressing of the bag mouth Wa by the bag 40, and the next preparation work or the like can be performed in advance. Thus, the bag holding device 100A is very efficient as a whole.

When the flexible bag W is relatively large and the bag mouth Wa is large, the binding string guide plate 30 is forcibly rotated by the link 10, and during this time, the guide groove 211 of the bag mouth Wa is formed. The inner end is pressed by the bag holding plate 40 as described above. When the bag mouth Wa is large,
Although the bag holding plate 40 does not rotate to the position shown in FIG. 7, the bag holding plate 40 still holds the bag opening Wa in the guide groove 211 by the action of the spring 50. . The string feed arm 31 holding the binding string 300 of the binding string guide plate 30 wraps around the bag opening Wa pressed by the bag holding plate 40 toward the inner end side of the guide groove 211 as described above. As described above, the delivery of the binding strap 300 to the twister 230 is ensured, and the binding of the bag mouth Wa by the binding strap 300 is performed as described above.

Regarding the bag holding device 100B according to the second aspect, the bag holding device 100A according to the first aspect is such that the binding string guide plate 30 and the bag holding plate 40 rotate at a fixed position with respect to the substrate 210. However, in the bag holding device 100B according to the second embodiment, the guide groove 21 of the substrate 210 is provided.
The binding string guide plate 30 and the bag holding plate 40 reciprocate while rotating with respect to the guide groove 211 by the pivot 20 that reciprocates in the pivot guide groove 215 provided in a state inclined with respect to the first guide groove 211. The points are different. That is, the bag holding device 100B according to the second aspect is suitable for being applied to a flexible bag W having a relatively large bag opening Wa.

In the bag holding device 100B, as shown in FIG. 17, the carriage 60, which is partially exposed in the pinion guide groove 214 and the pivot guide groove 215, is mounted on the substrate 2 as shown in FIG.
The carriage 60 is disposed on the lower surface of the substrate 10, and is connected to the swing arm 62 via a connection link 61 on the upper surface of the substrate 210. Therefore, when the swing arm 62 swings by a drive motor (not shown), the carriage 60 reciprocates along the pivot guide groove 215.

On the other hand, as shown in FIG. 18, a rack 212 parallel to the pivot guide groove 215 is formed on the substrate 210 side, and a pinion 213 on the carriage 60 engages with this rack 212. Furthermore, this pinion 213 is
0 and the gear 21 integral with the
Reciprocates along the pivot guide groove 215, the binding string guide plate 30 provided integrally with the pivot 20 moves forward from the right side slightly from the position shown in FIG. 16 to the position shown in FIG. It turns while rotating. At this time, the bag holding plate 40 is freely rotatable with respect to the pivot 20. A spring 73 for expanding the both is interposed between the bag holding plate 40 and the tip of the binding string guide plate 30. because there is,
The bag holding plate 40 follows the pivot 20 and moves forward and backward.

Here, if the bag mouth Wa of the flexible bag W is inserted into the inner end side of the guide groove 211, the pressing of the bag mouth Wa by the bag holding plate 40 is performed in the initial rotation of the bag holding plate 40. The adjustment is made immediately after, and the adjustment based on the difference in the size of the bag mouth Wa is made by the spring 73 in this case. Therefore, when the binding string guide plate 30 is rotated to the left as much as possible, the bag opening Wa is firmly pressed into the guide groove 211 by the holding portion 42 of the bag holding plate 40, and the binding string 300 is attached to the string feeding arm 31. By bag mouth W
The wire is wound around "a" and twisted by the twister 230, that is, binding is awaited.

Next, the binding string guide plate 30 starts to return. In this case, only the binding string guide plate 30 starts to return, and the bag holding plate 40 keeps pressing the bag opening Wa for a while. Will do. Because,
Since the bag holding plate 40 is urged by the spring 73 in the expanding direction with respect to the returning binding string guide plate 30,
While the urging force is present, the bag holding plate 40 continues to press the bag opening Wa into the guide groove 211, and only the binding string guide plate 30 is returning during this time.

As described above, in the bag holding device 100B according to the second aspect, the guide groove 21 of the bag opening Wa is also provided.
The pressing to the inner end on one side is firmly performed, the binding quality of the binding string 300 of the bag mouth Wa is improved, and the binding string guide is performed while the bag holding piece 40 is pressed against the bag mouth Wa. Since the plate 30 can be returned to the original position, the binding operation can be performed efficiently in a short time.

In any of the above claims, the pressing of the bag opening Wa for performing the binding operation and the pressing of the bag opening Wa at the time of the binding operation by the binding string 300 are performed as follows.
Since each bag holding plate 40 can surely and automatically perform the binding, it is naturally possible to perform the binding without loosening, and the binding quality is improved.

[0039]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a binding machine according to an embodiment of the present invention; And about each bag holding device 100A and 100B,
After the explanation of the common part is completed, the explanation will be made in detail by dividing each item.

The bundling machine 200 has an appearance as shown in FIGS. 1 to 4, and has a long binding string wound around a drum arranged on the right side in FIG. 3
00 is sent to each mechanism arranged above the binding machine 200. On the upper part of the binding machine 200, a substrate 210 on which each mechanism is assembled is arranged substantially horizontally, and the guide groove 211 formed on the substrate 210 is
1 and 2 are opened toward the left side in the figure. FIGS. 1 to 4 show a state in which the substrate 210 is covered by a cover, and does not actually appear, but an opening for exposing the guide groove 211 is formed in the cover. Only this guide groove 211 is shown in FIG.
It appears as shown in the figure.

When the tying operation is performed by the tying device 200, as shown in FIG. 2, the leading end of the tying string 300 is arranged near the guide groove 211. The claw 72 of the insertion detection lever 71 constituting the detection mechanism 70 is exposed in the inside 211. Therefore, when the worker inserts the bag mouth Wa of the flexible bag W to be bound into the guide groove 211, each mechanism constituting the binding machine 200 starts operating by the detection of the detection mechanism 70. That is, the binding work is automatically performed. For this reason, the binding machine 200 includes a feeding device 220 for the binding string 300 as shown in FIG. 10, a twister 230 as shown in FIG. 11 for binding the binding string 300 around the bag mouth Wa, Guide groove 211 described above
It has a detection mechanism 70 as shown in FIGS. 13 and 14 having a claw 72 exposed inside.

As shown in FIG. 10, the feeder 220 is connected to the twister 23 from the rear end (the right end in the drawing) of the substrate 210.
0, a guide rail 222 having a guide groove for the tying strap 300 extending near 0.
A pair of pinch rollers 221 for sandwiching and sending out the binding string 300 are arranged around the periphery of the pinch roller 22. Since the feeding device 220 is for feeding the tip of the binding string 300 through the twister 230 to the vicinity of the guide groove 211, the tip of the guide rail 222 is directed to the twister 230. Each of the pinch rollers 221 is rotated by a predetermined amount by, for example, clockwise rotation of the drive motor 81 shown in FIG. 6 and the like, and its operation is controlled by the switch 74 and the like on the detection mechanism 70 side. .

The twister 230 is a known twister, for example, as shown in FIG. 11, and twists a binding string 300 of a predetermined length by a portion facing the inside of the guide groove 211 in FIG. In other words, this twister 2
Reference numeral 30 denotes, for example, as shown in FIG. 12A, a groove through which the base end of the binding string 300 arranged around the bag mouth Wa is inserted, and an arm for locking the distal end of the binding string 300. By rotating the binding string 300 held by these grooves and the arm by a predetermined amount, the binding of the bag opening Wa by the binding string 300 is performed as shown in FIG. It is something to do. Further, a cutter is attached to the twister 230, and a part of the binding string 300 before binding is automatically cut.

The detection mechanism 70 detects an insertion detection lever 71 provided rotatably with respect to the substrate 210, a spring 73 that always returns the insertion detection lever 71 to its original position, and a movement of the insertion detection lever 71. A switch 74 (photomicrosensor in this embodiment) is provided. The insertion detection lever 71 of this embodiment includes a pawl 72 projecting into the guide groove 211 as described above, 72
A pressing portion 75 on the outer side is formed.

That is, the detection mechanism 70 is operated by the switch 74 so that the bag pressing device 100A or 100 will be described later.
The operation control of B and the operation control of the twister 230 and the cutting device included therein are performed, and the pressing portion 75 also presses the bag mouth Wa of the flexible bag W to some extent. That is, when the insertion detection lever 71 of the detection mechanism 70 starts to rotate rightward from the state shown in FIG. 13 by inserting the bag opening Wa into the guide groove 211, the bag holding device 100A or 100B When the binding operation is completed, the bag mouth Wa is removed from the guide groove 211 and the insertion detection lever 71 returns to the original position shown in FIG. 13, the feed device 220 is rotated clockwise. It is intended to start working. The drive motor 81 serves as a common drive source for the feeding device 220 and the bag holding device 100A or 100B described below, and rotates the feeding device 220 by rotating clockwise and the bag holding device 100A by rotating left. Or, it drives 100B.

Regarding the bag holding device 100A according to the first embodiment FIGS. 5 to 9 show the bag holding device 100A according to the first embodiment. A link 10 having one end connected to the plate 11 and a connecting pin 12 at the other end, a binding string guide plate 30 connected to the connecting pin 12 of the link 10 and connected to the pivot 20 on the substrate 210 side; String guide plate 3
0 and coaxially supported by a pivot 20 and a bag mouth W
a bag holding plate 40 having a holding groove 41 for a, an arc-shaped elongated hole 43 formed in the bag holding plate 40 and engaging the connecting pin 12 on the link 10 side, and a bag holding plate 40. Substrate 2
10 and a spring 50 for urging the bag holding plate 40 toward the guide groove 211 side.

That is, in this bag holding device 100A, as shown in FIGS.
The disk 11 rotated by one rotation to the left by the
The left end of the link 10 is connected to the disk 11. The left end of the link 10 is the pivot 2
The connecting pin 12 is connected to a part of the binding string guide plate 30 rotatably mounted on the substrate 210 by the connecting pin 12, and a part of the connecting pin 12 is coaxial with the binding string guide plate 30 by the pivot 20. It is engaged with the elongated hole 43 of the bag holding plate 40 connected to the substrate 210.

The binding string guide plate 30 has a substantially mowing cattail-like planar shape as shown in FIG. 8A, and most of the binding string guide plate 30 has a center at a portion where the pivot 20 comes. The string feed arm 31 has an arc shape, and a string holding groove 32 as shown in FIGS. 8A to 8E is formed at the tip of the string feed arm 31. In other words, the string feed arm 31 of the binding string guide plate 30 is shaped so as to be able to go around the bag mouth Wa inserted into the guide groove 211, and the rotation of the binding string guide plate 30 is performed. Accordingly, the binding string 300 is received by the string holding groove 32 at the tip thereof, and is arranged around the bag opening Wa.

The bag holding plate 40 disposed on the binding string guide plate 30 has a substantially fan-shaped plane shape as shown in FIG. As shown in FIG. 5, the portion is formed as having an arcuate outer shape inside the string feed arm 31 on the side of the binding string guide plate 30. Also, a dotted line in (b) of FIG. 9 and a (b) of FIG.
As shown in (d) to (d), a holding groove 41 for the binding string 300 is formed, and a lower end surface in the left end portion of the drawing as a holding portion 42 for a bag mouth Wa. Further, as shown in FIG. 9 (a), the bag holding plate 40 is formed with an arc-shaped long hole 43 centered on a portion supported by the pivot 20. In the hole 43,
As shown in FIGS. 5 and 7, a part of the connecting pin 12 connecting the binding string guide plate 30 and the link 10 is to be locked.

Then, as shown in FIG. 9A and FIG. 5, the spring 5
A locking portion for locking one end of the spring 50 is integrally formed, and the other end of the spring 50 is locked to the substrate 210 side. The spring 50 in the present embodiment is a tension spring, and urges the bag holding plate 40 to rotate leftward to the position shown in FIG.
If such an effect is achieved, the spring 50
Is not limited to a tension spring as in the embodiment.

Regarding the bag holding device 100B according to the second embodiment FIGS. 15 to 20 show the bag holding device 100 according to the second embodiment.
B, a bag holder 100B mainly includes a pinion 213 that meshes with a rack 212 formed on the substrate 211, and a carriage 60 that reciprocates with respect to the substrate.
And a pinion 213 is rotatably provided on the carriage 60 by a pivot 20 and via a gear 21 on the pivot 20.
A binding string guide plate 30 that rotates in conjunction with the above, a bag holding plate 40 that is coaxially supported by the binding string guide plate 30 and the pivot 20, and has a holding portion 42 for a bag opening Wa at the tip thereof.
A spring 50 is interposed between the distal ends of the bag holding plate 40 and the binding string guide plate 30, and biases the both to expand.

That is, in the bag holding device 100B,
While the binding string guide plate 30 and the bag holding plate 40 in the bag holding apparatus 100A according to claim 1 reciprocate around the pivot 20, the binding string guide plate 3
0 and the bag holding plate 40 together with the carriage 60 and the guide groove 211
And reciprocate around the pivot 20 which reciprocates with the carriage 60 while reciprocating in the vicinity of. Therefore, in the bag holding device 100B, as shown in FIG. 17, a pinion guide groove 214 and a pivot guide groove 2 which are inclined with respect to the guide groove 211 and are parallel to each other.
15 is formed on the substrate 210. The substrate 210 located on the upper side of the pinion guide groove 214 in FIG.
As shown in FIG. 8, a rack 212 having teeth parallel to the pinion guide groove 214 is mounted, and a pinion 213 on the carriage 60 is engaged with the rack 212.

The carriage 60 is arranged on the lower surface side of both the pinion guide groove 214 and the pivot guide groove 215 of the substrate 210.
The left end of a connection link 61 arranged above 0 is rotatably connected. At the right end of the connection link 61, the board 2
Swing arm 62 arranged below and driven to swing
Are connected through an arc groove 216 formed in the substrate 210. Therefore, the swing arm 62 is driven by the drive motor 8.
1 and the like, the driving force is transmitted to the carriage 60 through the connection link 61, and the carriage 60 reciprocates with respect to the pinion guide groove 214 and the pivot guide groove 215. It becomes.

As shown in FIG. 18, the carriage 60 is provided with a pinion 213 that meshes with the rack 212 on the substrate 210. The pinion 213 is connected to the pivot 20 on the carriage 60 by the gear 21. , The pivot 20 moves along with the reciprocating movement of the reciprocating carriage 60.
It reciprocally rotates above. And this axis 20
As shown in FIG. 19, the binding string guide plate 3
0 is integrally provided, and a bag holding plate 40 above the binding string guide plate 30 is rotatably provided as shown in FIG.

The binding string guide plate 30 in the bag holding device 100B has a planar shape as shown in FIGS. 15 and 19, and the binding string guide plate 30 is also different from that of the above-described bag holding device 100A. It has a similar string feed arm 31 and a string holding groove 32. As shown in FIG. 19, the binding string guide plate 30 of this embodiment is formed with an arc-shaped groove 33 centered on the pivot 20, and supports the pinion 213 in the arc-shaped groove 33. The shaft is locked. In other words, the arc-shaped groove 33 can define the reciprocating rotation range of the binding string guide plate 30 by this, but the regulation is sufficient because the reciprocating range of the carriage 60 is defined. Rather, the binding strap guide plate 3
This is for preventing the lifting of the binding strap 300 from being lifted from the substrate 210 at the time of the reciprocating rotation of zero.

On the other hand, as shown in FIGS. 15 and 20, the bag holding plate 40 arranged on the binding string guide plate 30 is used to press the holding groove 41 for the binding string 300 and the bag opening Wa. Is similar to that of the bag holding device 100A according to claim 1 described above,
The pressing portion 42 of the bag pressing plate 40 of the bag pressing device 100B has a linear shape as shown in the drawing to facilitate its manufacture. The reason why the shape of the holding portion 42 can be simplified in this way is that the bag holding plate 40 also moves straight around the bag opening Wa by the carriage 60 while rotating around the pivot 20. This is because there is something to do.

The rotation of the bag holding plate 40 about the pivot 20 is carried out by a spring 50 which is a helical coil spring between the bag holding plate 40 and the binding string guide plate 30. The rotation is transmitted by transmitting the power. That is, since the spring 50 is interposed at the distal end portions of the binding string guide plate 30 and the bag holding plate 40 and biases both to expand about the pivot 20, the binding string guide is provided. The plate 30 is the carriage 60
Is rotated leftward by the pinion 213 on the side and the gear 21 on the pivot 20, the turning power is
As a result, the transmission is transmitted to the bag holding plate 40 side via the zero, and as a result, the bag holding plate 40 rotates with the rotation of the binding string guide plate 30.

When the bag holding plate 40 comes into contact with the bag opening Wa in the holding space 90 of the guide groove 211 by the rotation thereof, the bag holding plate 40 is further turned by the further rotation of the binding string guide plate 30. The mouth Wa is pressed into the end of the guide groove 211. The amount of pressure varies depending on the size of the bag mouth Wa, but the spring 50 is interposed between the binding strap guide plate 30 and the rotation of the binding strap guide plate 30 to a predetermined position is regulated. Never. Conversely, the larger the bag mouth Wa, the larger the guide groove 211.
The inward pressure is increased by the spring force of the spring 50, and the binding of the bag mouth Wa by the binding strap 300 is always performed with stable quality.

Of course, also in the bag holding device 100B, when the binding string guide plate 30 returns to its original position and turns, the bag holding plate 40 moves the bag opening Wa into the guide groove 211 by the urging force of the spring 50. The state of being pressed continues for a while. Then, the binding string guide plate 30 is
If the return rotation is performed until the 0 is sufficiently expanded, the spring 50 causes the bag holding plate 40 to return to the original position.

[0060]

As described above in detail, according to the first aspect of the present invention, as described in the above embodiment, "the bag opening Wa to be bound of the flexible bag W containing the stored items" 210 provided with a guide groove 211 for guiding the cable, a feeder 220 provided on the side of the substrate 210 to guide the binding string 300 in the vicinity of the guide groove 211, and around a bag mouth Wa guided in the guide groove 211. A twister 230 that performs binding of the binding string 300 wound around and cutting of a predetermined length,
A bag holding device 100A for a binding machine 200 for binding a bag mouth Wa of a flexible bag W, wherein the disk 1 is driven to rotate.
1, a link 10 having one end connected to one end and a connecting pin 12 at the other end, a binding string guide plate 30 connected to the connecting pin 12 of the link 10 and connected to the pivot 20 on the substrate 210 side, and the binding string. The holding groove 4 for the bag mouth Wa is coaxially supported by the guide plate 30 and the pivot 20 at its tip.
1, an arc-shaped long hole 43 formed in the bag holding plate 40 and engaging the connecting pin 12 on the link 10 side, and between the bag holding plate 40 and the substrate 210. And a spring 50 that is interposed to urge the bag holding plate 40 toward the guide groove 211. " Even if the size changes, it is possible to provide a binding device capable of always performing the binding of the bag mouth with firm and stable quality.

That is, according to the bag holding device 100A of the first embodiment, the binding strap guide plate 30 ensures that the binding strap 300 is fed around the bag opening Wa, and the binding strap guide plate 30A. The guide groove 21 of the bag mouth Wa of the flexible bag W is formed by the bag holding plate 40 which moves in a different manner.
Since the inside 1 is pressed, the bag mouth Wa can be held in the guide groove 211 automatically and stably, and the binding of the bag mouth Wa by the binding strap 300 is further automated. And the quality of the unity can be improved.

Further, by adopting the above-described configuration, the entire configuration of the bag holding device 100A can be simplified, whereby the feeding device for the conventional binding machine 200 can be simplified. The bag holding device 100A having the above-described effects can be provided without largely changing the configurations of the 220, the twister 230, and the detection mechanism 70. In other words, the feeder 22
The conventional products such as 0, twister 230, and detection mechanism 70 can be used as they are, and the bag holding device 100A with excellent effects can be obtained.

In the invention according to claim 2,
Similarly, “a substrate 210 having a guide groove 211 for guiding a bag mouth Wa to be bound of a flexible bag W containing stored items, and a binding string 300 provided on the substrate 210 side near the guide groove 211. Feeder 220 for guiding the guide groove 211
Twister 23 that binds the binding string 300 wound around the bag opening Wa guided into the inside and cuts it to a predetermined length.
And a bag holding device 100B for a binding machine 200 that binds the bag mouth Wa of the flexible bag W with
Pinion 21 meshing with rack 212 formed in
And a carriage 60 reciprocating with respect to the substrate with the pivot 3, provided on the carriage 60 so as to be rotatable about a pivot 20, and interlocked with a pinion 213 via a gear 21 on the pivot 20. The moving binding string guide plate 30 and the binding string guide plate 3
0 and coaxially supported by a pivot 20 and a bag mouth W
a bag holding plate 40 having a holding portion 42 for a, and a spring 50 interposed between the respective ends of the bag holding plate 40 and the binding string guide plate 30 to urge them to expand. This bag holding device 1
00B, the bag mouth can be narrowed down automatically,
Even if the size of the bag changes, it is possible to provide a binding device that can always perform the binding of the bag mouth with firm and stable quality.

That is, according to the bag holding device 100B, the bag holding plate 40 and the binding string guide plate 30 are connected to the bag opening Wa.
I'm trying to move forward and wrap around it,
The binding machine 200 that binds the large bag mouth Wa can be provided. Further, according to the bag holding device 100B, the binding operation can be substantially completely automated and the binding quality can be stabilized, and the feeding device 220 of the conventional binding machine 200 can be used. , The twister 230 and the detection mechanism 70 can be used as they are, and the inexpensive bag holding device 100B can be used.
It can be provided as.

[Brief description of drawings]

FIG. 1 is a side view of a binding machine to which the present invention is applied.

FIG. 2 is a plan view of the binding machine.

FIG. 3 is an enlarged front view of the binding machine.

FIG. 4 is a rear view of the binding machine.

FIG. 5 is a plan view showing a main part of the bag pressing device according to claim 1.

FIG. 6 is a side view of the bag holding device.

FIGS. 7A and 7B show the positional relationship when the binding string guide plate and the bag holding plate of the bag holding device are rotated to the maximum extent, wherein FIG. 7A is a plan view and FIG. 7B is a side view.

8A and 8B show a binding string guide plate employed in the bag holding device, wherein FIG. 8A is an enlarged plan view thereof, FIG. 8B is a front view thereof, FIG. 8C is a rear view thereof, and FIG. Same left side view,
(E) is a right side view of the same.

9A and 9B show a bag holding plate employed in the bag holding device, wherein FIG. 9A is a plan view thereof, FIG.
(C) is a rear view and (D) is a right side view.

FIG. 10 is a plan view showing a feeding device of the binding machine to which the present invention is applied.

FIG. 11 is a plan view showing a twister feeder to which the present invention is applied.

12 shows a state in which the bag mouth of the flexible bag is bound by a binding string by the twister shown in FIG. 11,
(A) is a partial perspective view before bundling, and (B) is a partial perspective view after bundling.

FIG. 13 is a plan view showing a feeding device of a detection mechanism to which the present invention is applied.

FIG. 14 is a front view of the detection mechanism.

FIG. 15 is a partial plan view showing the bag holding device according to the second embodiment, in a state where each binding string guide plate and the bag holding plate are rotated to the maximum.

FIG. 16 is a partial plan view showing the bag holding device, showing a state where each binding string guide plate and the bag holding plate are at positions slightly advanced from their original positions.

FIG. 17 is a partial plan view showing a relationship between a carriage and a board for supporting the binding string guide plate and the bag holding plate.

18 is a partial plan view showing a state where a pinion and a gear are assembled to the carriage of FIG. 17;

FIG. 19 is a partial plan view showing a state where a binding string guide plate is attached to a pivot on the carriage.

FIG. 20 is a partial plan view in which a bag holding plate is assembled to the pivot and the binding string guide plate is omitted.

FIG. 21 is a perspective view showing a conventional binding machine.

FIG. 22 is a partially enlarged plan view of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100A bag holding device 100B bag holding device 10 link 11 disk 12 connecting pin 20 pivot 21 gear 30 bundling string guide plate 31 string feed arm 32 string holding groove 40 bag holding plate 41 holding groove 42 holding part 43 long hole 50 spring 60 reciprocating Table 61 Connecting link 62 Swing arm 70 Detection mechanism 71 Insertion detection lever 72 Claw 73 Spring 74 Switch 81/82 Drive motor 90 Holding space 200 Binding machine 210 Board 211 Guide groove 212 Rack 213 Pinion 214 Pinion guide groove 215 Axis guide groove 220 Feeding device 221 Pinch roller 222 Guide 230 Twister 300 Binding strap

Claims (2)

[Claims] 1. A substrate having a guide groove for guiding a bag opening of a flexible bag containing stored items to be bound, and a feeder provided on the substrate side and leading a binding string near the guide groove. And a twister for tying a binding string wound around the bag mouth guided in the guide groove and for cutting a predetermined length, and binding the bag mouth of the flexible bag. A link having one end connected to a rotatably driven disk and a connection pin at the other end, and a link connected to the connection pin of the link and connected to a pivot on the substrate side. The binding string guide plate to be formed, a bag holding plate coaxially supported by the binding string guide plate and the pivot, and having a holding groove for the bag mouth at the tip thereof, and a bag holding plate formed on the bag holding plate. An arc-shaped elongated hole into which the link-side connecting pin is engaged, A bag holding device for a binding machine, comprising: a spring interposed between the holding plate and the substrate to bias the bag holding plate toward the guide groove. 2. A substrate having a guide groove for guiding a bag opening of a flexible bag containing stored items to be bound, and a feeder provided on the substrate side and leading a binding string near the guide groove. And a twister for tying a binding string wound around the bag mouth guided in the guide groove and for cutting a predetermined length, and binding the bag mouth of the flexible bag. A bag holding device for a machine, comprising: a carriage having a pinion that meshes with a rack formed on the substrate and reciprocating with respect to the substrate; and a pivot on the carriage. A binding string guide plate that is provided on the pivot shaft and rotates in conjunction with the pinion via a gear on the pivot;
A bag holding plate coaxially supported by the binding string guide plate and the pivot and having a holding portion for the bag opening at the tip thereof, between each end of the bag holding plate and the binding string guide plate. A bag presser for a binding machine, comprising: a spring interposed between the springs and biasing the both to expand.