JP2003205913A - Leg gathering mechanism in clip binding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep a leg gathering amount having both leg pieces of a clip overlapped to each other constant even if a size tolerance of a component part such as a link mechanism or the like and carrier movement change and further keep an overlapping amount of both leg pieces of the clip constant. <P>SOLUTION: A pair of leg gathering arms 16 are abutted to each other with a clip 1 being formed into a conical shape, a protrusion 23 for restricting an amount of motion of the arms 16 is formed and an operating member 18 for operating the leg gathering arms 16 through a link 17 is operated through a resilient means 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a clip formed of a plastic thin piece to a neck portion of a packaging bag,
The present invention relates to a clip binding machine in which the clip is formed into a conical shape to bind the bag neck portion, and more particularly to a leg shifting mechanism in the clip binding machine that shifts a pair of leg pieces formed on the clip to a position where the leg pieces overlap each other. .

[0002]

2. Description of the Related Art In order to close the mouth of a bag containing food such as bread and vegetables, as shown in FIG. 11, an opening opened toward one end so as to accommodate the neck of a bundled bag. Clips 1a, 1b formed of a plastic thin piece in which a portion 2 is formed in the center and a pair of leg pieces 3 are formed on both sides of the opening 2 in the direction in which the opening is opened.
.. are connected to each other, and the neck portion of the bag mouth in which the contents are accommodated is inserted into the opening portion 2 of each clip 1.
As shown in FIG. 2, the pair of leg pieces 3 of the clip 1 are drawn inward so as to intersect with each other and formed into a conical shape so that the opening 2 becomes the apex, and the overlapping portions of both leg pieces 3 are swaged or welded. There is already known a clip binding machine which binds the neck portion of a packaging bag containing the contents by fixing it by such means.

As shown in FIG. 11, the clip 1 is formed by integrally connecting the front ends of both leg pieces 3 to the rear end edge of the front clip via a connecting portion 3a having a small cross-sectional area. It is wound into a coil shape, loaded into a clip binding machine, and sequentially supplied to the binding section by a clip supply mechanism.
A through hole 4 is formed in a pair of leg pieces 3 projecting toward the front of each clip, and a leg moving pin that engages with the through hole 4 pulls both leg pieces 3 inward from each other. Molded so that they polymerize with each other.

[0004]

By the way, the leg shifting mechanism in the clip binding machine is fitted into the through holes of the leg pieces of the clip from both sides of the clip and overlaps the leg pieces so that they are close to each other. Since the clip is operated based on the movement operation of the carrier that moves the clip in the front-rear direction via a pair of link mechanisms that have pins, the dimensional tolerances of the components that make up the multiple link mechanisms are integrated. Due to such factors, the operation amount of the leg approach pin varies. Furthermore, since the operation of the link mechanism is performed by pressing the base end side of the link mechanism due to the movement of the carrier, the leg approach mechanism can sufficiently overlap the leg pieces when the carrier reaches the end of movement. In some cases, the binding could not be done or the leg pieces crossed, resulting in poor binding. Therefore, in the conventional clip binding machine, it is necessary to provide an adjusting mechanism for matching the working stroke of the carrier and the working stroke of the leg approach pin, and it is necessary to perform this adjusting operation for each machine.

According to the present invention, even when there is a dimensional error between the link mechanisms or when the movement amount of the carrier changes,
The amount by which the legs of the clip are overlapped becomes constant,
It is an object of the present invention to provide a clip leg approach mechanism capable of keeping the amount of overlapping of both leg pieces of the clip constant.

[0006]

In order to solve the above problems, the leg shifting mechanism in the clip binding machine according to the present invention is provided on both sides with respect to the feeding direction of the clip, and the tip can engage with the leg piece of the clip. An operation in which a leg-moving arm provided with a leg-moving pin is rotatably pivotally supported and arranged, is connected to the leg-moving arm through a link, and is slidably arranged in the clip feeding direction. A pair of leg adjusting arms, and the pair of leg adjusting arms are provided with a restricting portion for restricting the operation amount of the leg adjusting arms by making contact with each other in a conical shape of the clips, and supplying the operating member to the clip. It is characterized in that it is operated via an elastic means by an actuating mechanism that slides along a direction.

According to a second aspect of the present invention, a pair of leg moving arms, each having a leg moving pin capable of engaging with a leg piece of the clip at its tip, are symmetrically provided at both ends in the feeding direction of the clip at one end. A cam block having a cam surface composed of an inclined surface and a parallel surface is arranged on both sides along the slide operation locus of the leg-placing arm so as to be pivotally supported on the leg-pulling arm, The arm is brought into contact with the cam surface of the cam block so that the leg is actuated.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing the whole of the clip binding machine adopting the clip cutting mechanism of the present invention by shifting the upper cover and the mechanism arranged on the upper side so that the inside of the clip binding machine can be seen.
In the clip binding machine 5, a main body housing 7 is provided at an upper end of a post standing upright on the support leg 6, and the main body housing 7
Inside, there is a clip feeding mechanism that feeds the clips sequentially toward the bundling section, and a leg of the clip that is operated to polymerize both leg pieces of the clip attached to the neck of the bag mouth to form the clip into a substantially conical shape. The main mechanisms that constitute the clip binding machine, such as the shifting mechanism, the crimping mechanism for fixing the two leg pieces of the overlapped clips, and the motor driving each of these mechanisms, are arranged.

As shown in FIG. 11, the clip 1 has an opening 2 formed in the central portion, the opening 2 being open toward one end so as to accommodate the neck portion of the bundled bag. The clips 1, which are made of plastic thin pieces on which the leg pieces 3 are formed, and which are connected to each other, are wound in a coil shape and loaded into a magazine 8 formed in the rear portion of the main body housing 7 to form the main body housing 7. Is supplied to the bundling portion by a clip supply mechanism inside the bag and is attached to the neck portion of the bag P disposed in a guide groove 9 that converges and guides the mouth portion of the bag to position the bundling portion. The pieces 3 are drawn together so that the two leg pieces 3 are overlapped with each other, and the two leg pieces 3 of the clip 1 that have been overlapped are joined by a caulking mechanism or a welding mechanism to complete the binding. As shown in FIG. 12, when the bundling is completed, the clip 1 surrounds the neck portion of the bag P and is formed into a conical shape.

As shown in FIG. 2, a carrier 10 that is slid in the main body housing 7 along the feeding direction of the clip 1 by an actuating mechanism (not shown), and the clip 1 is disposed on the upper surface of the carrier 10. The lower case 12 forming the supply guide surface 12a, the supply unit 13 integrally coupled with the lower case 12, and the leg pieces 3 of the clip 1 arranged on the upper surface of the supply unit 13 are pulled toward each other so that the two leg pieces 3 are connected to each other. A leg approach mechanism 14 for superimposing in a superposed manner is provided. The lower case 12
The supply unit 13 is slid together with the carrier 10 in the initial stage of the sliding operation of the carrier 10,
In the latter stage of the sliding operation of the carrier 10, the sliding operation of the lower case and the supply unit is stopped, and the carrier 10 operates so as to move forward relative to the lower case 12 and the supply unit 13.

The leg shifting mechanism 14 provided on the upper surface of the supply unit 13 engages in the through hole 4 formed in the leg piece 3 of the leading clip and operates the leg shifting pin 15 to operate the leg piece 3. It is composed of a pair of leg approaching arms 16 each having a tip end and an operating member 18 for operating the leg approaching arms 16 via a link 17 connected to an end of the leg approaching arm 16. The pair of leg shift arms 16 are pivotally supported together on the upper surface of the supply unit 13 at the inner ends, and the direction in which the leg shift pins 15 provided on the forwardly extending tip cross the clip supply direction. It is turned to. The operating member 18 is supported on the upper surface of the supply unit 13 so as to be slidable along the supply direction of the clip 1, and the operating member 18 is connected to the outer portion of the leg arm 16 via a pair of links 17. When the actuating member 18 is slid with respect to the supply unit 13, the leg approaching arm 16 is rotated about the pivot point via the link 17 and the leg approaching pin 15 is actuated.

As shown in FIG. 7, each of the pair of leg approaching arms 16 has a leg approaching pin 15 formed at the front end thereof engaged with the through hole 4 of the clip 1 to attach the leg piece 3 of the clip 1. When the clips 1 are pulled toward the inside and overlapped to operate to the state where the clip 1 is formed into a conical shape, the projections (regulating portions) 23 that come into contact with each other and function to limit the further operation of the leg moving arms 16 are provided. Has been formed. The protrusion 23 is formed by bending a part of the plate-like piece forming the leg approaching arm 16, and when the leg approaching arm 16 rotates with respect to the supply unit 13 about a pivot point, a pair of protrusions 23 are formed. The protrusions 23 formed on the leg approach arm 16 come into contact with each other to restrict the rotation.

The carrier 10 has the leg shifting mechanism 1
An operating mechanism 19 for operating the four operating members 18 is formed. The operating mechanism 19 is, as shown in FIGS. 8 and 9,
A case 20 fixedly formed on the carrier 10, an elastic means 21 housed in the case 20, and an operation piece 22 that is partially biased from the case 20 and is urged forward by the elastic means 21. It is composed of. The operating piece 22 is arranged so as to face the projecting piece 18a (see FIGS. 6 and 7) formed at the rear end of the actuating member 18, and when the lower case 12 is moved integrally with the carrier 10, Both the operating piece 22 and the projecting piece 18a move without abutting on each other. When the lower case 12 is stopped and the carrier 10 is further moved, the operating piece 22 contacts the projecting piece 18a of the operating member 18, and the operating member 18 is moved by the biasing force of the compression spring forming the elastic means 21. Then, the leg moving arm 16 is operated by causing the supply unit 13 to slide forward.

The operation for pulling the leg pieces of the clip according to the above embodiment together will be described below with reference to FIGS. As shown in FIG. 3, when the leading clip 1a is being supplied toward the binding portion, the carrier 10 is moved integrally with the lower case 12 and the supply unit 13,
The operating piece 22 of the operating mechanism 19 provided on the carrier 10 and the projecting piece 18 of the operating member 18 supported by the supply unit 13
It is moved as a unit apart from a. Actuating member 1
The leg rest arm 16 is not actuated because 8 is not actuated. During the movement, the leading clip 1a is cut from the following clip (1b), and the leading clip 1a is converged and attached to the neck portion of the bag arranged in the binding portion.

When the neck of the bag is mounted in the opening of the clip, the lower case 12 and the supply unit 13 are stopped from moving, and only the carrier 10 is moved further forward. When the supply unit 13 is stopped, the leg shifting mechanism 14 supported by the supply unit 13 is also stopped at a fixed position, and as shown in FIG. 4, the operating piece 22 of the operating mechanism 19 provided in the carrier 10 is stopped.
Is brought into contact with the projecting piece 18a of the operating member 18, and the operating member 18 is pressed forward with respect to the supply unit 13 by the action of the elastic means 21 composed of the compression spring which is applied to the operating piece 22. As the carrier 10 moves further forward, the actuating member 18 slides by the action of the elastic means 21, and the leg approach arm 16 is pivotally operated about the pivot point via the link 17 as shown in FIG. ,
Leg shift pin 1 provided at the tip of the leg shift arm 16
5 draws the leg pieces 3 of the clip 1 inwardly, and the two leg pieces 3 are polymerized to form the clip 1 into a conical shape. In the above state, the projections 23 formed on the pair of leg approach arms 16 come into contact with each other and the turn of the leg approach arms 16 is stopped.

When the carrier 10 further moves forward, as shown in FIG. 6, the case 20 of the actuating mechanism 19 moves forward as the carrier 10 moves, and the leg moving arm 16 cannot rotate so that the carrier 10 cannot slide. The operating piece 22 of the operating mechanism 19 which is in contact with the operating member 18 is pushed into the case 20 against the elastic means 21. That is, the difference between the slide movement amount of the carrier 10 and the operation stroke of the operating member 18 is absorbed by the elastic means 21 and is thus transmitted to the carrier 1
Regardless of the amount of movement of 0, the actuation amount of the leg approach arm 16 can always be kept constant.

Next, an embodiment of another leg approach mechanism 24 of the present invention will be described with reference to FIGS. 10 (a), 10 (b) and 10 (c).
In the leg moving mechanism 24 of this embodiment, a pair of leg moving arms 26 each having a leg moving pin 25 at the tip end are rotatably pivoted at the base end on the supply unit 13 similar to the above-described embodiment. It is supported. Cam blocks 27 are formed on both sides of the chassis of the clip binding machine corresponding to the position where the leg moving arms 26 start the leg moving operation, and the pair of leg moving arms 26 are separated from the pivotally supported portion. The roller 2 that can be engaged with the cam surface of the cam block 27 on the outside
8 is rotatably supported. The cam surface 29 formed on the inner side of the cam block 27 is inclined so as to move the leg moving pin 25 from the state before the leg moving pin 25 is operated to the position where the leg moving pin 25 is pulled to the overlapped state of the clip leg pieces. A surface 29a and a parallel surface 29b for maintaining the leg approach pin 25 in a position where the leg pieces of the clip are overlapped are continuously formed.

As shown in FIG. 10A, the supply unit 1
While the clip is being supplied to the tying portion by 3, the roller 28 of the leg moving mechanism 24 has not reached the position of the cam block 27, and therefore the leg moving arm 26 is not operating. At the timing when the supply unit 13 moves forward and pulls the leg pieces of the clip, that is, at the position where the clip is attached to the neck of the bag, as shown in FIG. It moves inward along the inclined surface 29a of the cam surface 29 of the cam block 27, and as a result, as shown in FIG. Group pin 25
Pulls the clip legs 3 together to form the clip. Even if the movement amount of the supply unit 13 is set to be large, the roller 2 of the leg shifting arm 26 is
Since 8 moves to the parallel surface 29b of the cam surface 29, a constant amount of leg approach is maintained.

[0019]

As described above, according to the leg shifting mechanism in the clip binding machine of the first aspect of the invention, the pair of leg shifting arms are provided with the regulating portions, and the regulating portions are brought into contact with each other in the clip-formed state. At the same time, the elastic means is interposed between the operating member and the carrier for operating the leg approaching arm via the link, and the operating member is operated via the elastic means. Instead, the operation amount of the leg approach arm can always be kept constant, and the leg approach amount of the clip can be kept constant to prevent the occurrence of binding failure.

Further, according to the second aspect of the present invention, since the leg approaching arm is directly actuated by the inclined surface of the cam block formed outside the leg approaching arm, the operation amount of the leg approaching arm is on both sides. It is determined by the opposing cam surfaces of the arranged cam blocks, and it is possible to maintain a more accurate leg shift amount as compared with a conventional mechanism that operates via a plurality of link mechanisms.

[Brief description of drawings]

FIG. 1 is a perspective view of a clip binding machine in which a leg approach mechanism of the present invention is implemented, with a cover removed.

FIG. 2 is an exploded perspective view showing main components housed in a housing of the same clip binding machine as in FIG.

FIG. 3 is a plan view of an essential part showing a state where a clip of the same embodiment as in FIG. 1 is supplied.

FIG. 4 is the same plan view as FIG. 3 in a state immediately before the leg approach mechanism is activated.

FIG. 5 is the same plan view as FIG. 3 in a state where the leg approach mechanism is operated.

FIG. 6 is the same plan view as FIG. 3 in a state in which the carrier has further moved after the leg approach mechanism has been activated.

FIG. 7 is a perspective view of a main part of the leg approach mechanism.

FIG. 8 is a perspective view showing a component structure of an operating mechanism.

FIG. 9 is a sectional view of an operating mechanism.

10A and 10B are operational state diagrams showing a leg approach mechanism according to another embodiment of the present invention, where FIG. 10A is a state before the leg approach mechanism is actuated, and FIG. 10B is a state where the leg approach mechanism is actuated. , (C)
Is the state where the feed mechanism has moved further after the leg approach mechanism has been activated.

FIG. 11 is a plan view of a clip used in the clip binding machine of the present invention.

FIG. 12 is a perspective view of a bag bound by the clip binding machine of the present invention.

[Explanation of symbols]

1 clip 2 openings 3 legs 3a connection part 4 through holes 5 clip binding machine 6 support legs 7 Body housing 8 magazines 9 guide groove 10 careers 11 Working gear 12 lower case 12a Clip guide surface 13 Supply unit 14 Leg shifting mechanism 15 Leg justification pin 16 Leg-arm 17 links 18 Working member 18a protrusion 19 Operating mechanism 20 cases 21 compression spring 22 Operation piece 23 Protrusion (Regulator) 24 Leg shifting mechanism 25 Leg justification pin 26 Leg-arm 27 Cam Block 28 Laura 29 Cam surface 29a inclined surface 29b parallel plane

Claims (2)

[Claims] 1. A clip provided with a pair of leg pieces having an opening opened toward one side and extending along both sides in the opening direction of the opening is supplied toward a binding portion, and the clip is supplied. In a binding machine in which the opening of the clip is attached to the material to be bound, and the leg portions of the clip are formed into a conical shape so that the overlapping portions are fixed, the binding device is provided on both sides in the feeding direction of the clip. And a pivoting arm provided with a pivoting pin that can be engaged with a clip leg piece at its tip is rotatably pivotally supported and arranged, and is connected to the pivoting arm via a link and the clip An operating member slidably arranged along the supply direction, and a restricting portion for restricting an operation amount of the leg approach arms by contacting the pair of leg approach arms with each other in a state where clips are formed in a conical shape. To form Leg positioning mechanism in the clip binding machine being characterized in that so as to operate through the resilient means by operation mechanism that slides actuated along the actuation member in the feed direction of the clip. 2. A clip provided with a pair of leg pieces having an opening opening toward one side and extending along both sides of the opening in the opening direction is supplied toward the binding portion, and the clip is supplied. In the binding machine where the opening part of the clip is attached to the material to be bound and the leg parts of the clip are formed into a conical shape so that the overlapping parts are fixed, the tip part of the clip can be engaged with the leg part of the clip. A pair of leg-moving arms having different leg-moving pins are symmetrically arranged on both sides in the feeding direction of the clip on one end of the feeding unit so as to be pivotally supported and supported, and a sliding operation of the leg-moving arms is performed. A cam block having cam surfaces composed of inclined surfaces and parallel surfaces is arranged on both sides along the locus, and the leg approach arm is brought into contact with the cam surface of the cam block to perform the leg approach operation. Characteristic chestnut Leg positioning mechanism in-flops binding machine.