JP2003267320A - Driving means in clip binding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the durability of each driving means for feeding clips to a clip binding machine and for binding the clips. <P>SOLUTION: Cam holes 29 into which a cam pin 26 is freely fitted are respectively defined in the superposed portion of both of a carrier A 27 for holding a clip 1 to feed it to a binding position and a carrier B 30 to which a forming means for form the clip in a binding state is connected. A selector plate 35 defining the cam hole of the carrier A and forming a cam edge 37 deviated to the side positioned in the direction in which the clip is fed, is rotatably provided to the carrier B. The cam pin is engaged with the cam holes defined in both the carrier A and the carrier B to operate them so as to be integrally moved forward. The clip is thereby fed to the binding position. The cam edge of the selector plate is engaged with the cam pin, thereby making the carrier B move forward with respect to the carrier A to operate the forming means. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip bundling machine for bundling, for example, a bag containing food or the like with a sheet-shaped clip, and holding the clip at the bag neck. The present invention relates to a driving mechanism in a clip bundling machine that drives a supply mechanism that supplies a bundling position to be bound and a forming mechanism that superimposes and bundles leg pieces of a clip attached to a neck of a bag. 2. Description of the Related Art In order to close the neck of a bag containing food such as bread and vegetables, as shown in FIG. 10, an opening 2 which is open toward one end is formed in the center. A pair of leg pieces 3 is formed on both sides of the opening of the opening 2 and is formed of a plastic thin piece. A binding machine that closes the neck of a bag using a clip 1 formed integrally as a connection clip 6 through an interlock is known. This clip bundling machine supplies a connecting clip 6 loaded in a magazine to a binding position where the leading clip 1 is attached to a squeezed neck portion of a bag containing an article to be packaged. The pin 3 of the forming mechanism is engaged with the through hole 5 formed in the
Are drawn inward to each other and polymerized to form a clip into a conical shape to bind the necks of the bags, and the overlapped portions of the two leg pieces 3 are joined together by a caulking mechanism to bind the bag mouth as shown in FIG. Is what you do. As shown in FIG. 12, a conventional clip supply device includes a feed plate 8 which reciprocates in the front-rear direction (left-right direction) by the rotation of a drive gear 7, and is disposed on the feed plate 8 and Plate 9 that is movable in the forward and backward directions, and the clip holding member 1 that is disposed on the stopper plate 9 and that is movable in the forward and backward directions.
0 is provided. The clip supply device includes an arm holding member 11 disposed on the clip holding member 10 and movable in the front-rear direction, and a pair of arms that rotate about a shaft 12 provided on the clip holding member 10. Tie pin arm 1
3, 13 and the like. The arm holding member 11 and the tie pin arms 13 are connected by feed arms 14. When the arm holding member 11 moves forward, the distal ends of the tie pin arms 13, 13 rotate in a direction to close each other. In addition, the tie pin arms 13, 1
3 have tie pins 13a, 13a projecting downward.
Is provided. The tie pins 13 a, 13 a pass through the through holes 5 of the clip 1 and are inserted into the grooves 10 a, 10 a at the tip of the clip holding member 10. Further, the stopper plate 9, the clip holding member 10, and the arm holding member 11 are provided with a pair of lock pieces 9A, 10A, and 11A which are urged to rotate inward. In addition, the lock piece 9A engages with the recess 15a of the engagement wall 15 provided along the stopper plate 9, and the lock piece 10A engages with the recess 9a provided on both sides of the stopper plate 9, and the lock piece 11A. Are adapted to engage with concave portions 10 a provided on both side portions of the clip holding member 10. On both sides of the feed plate 8, projections 8A, 8B and 8C projecting upward are provided, respectively. Moreover, these projections 8A, 8B, and 8C
The lock plates 9A, 10A, and 11A are engaged with each other, and the stopper plate 9, the clip holding member 10, and the arm holding member 11 are respectively advanced by the advance of the feed plate 8. Next, the operation of the clip supply device having such a configuration will be described. Now, when the feed plate 8 advances rightward by the rotation of the drive gear 7 from the state shown in FIG. 12, the projections 8a, 8b and 8c of the feed plate 8 engage with the lock pieces 9A, 10A and 11A, respectively. As a result, the stopper plate 9, the clip holding member 10, and the arm holding member 11 move forward together with the feed plate 8. When the clip 1 is sent to the binding position (not shown) by the advancement of the clip holding member 10, the lock piece 9A is engaged with the recess 15 of the engagement wall 15 as shown in FIG.
a, the engagement of the feed plate 8 with the lock piece 9A by the projection 8a is released, and the advancement of the stopper plate 9 stops. Thus, the second and subsequent clips of the connecting clip are held by the stopper plate 9. Further, when the leading clip held by the clip holding member 10 is moved forward by the advancement of the feed plate 8, the connecting clip 6 is cut between the first clip 1 and the second clip, and The clip 1 is advanced to the binding position. In this position, as shown in FIG. 14, the lock piece 10A of the clip holding member 10 is engaged with the recess 9a of the stopper plate 9, and the engagement with the lock piece 10A by the projection 8b of the feed plate 8 is released, and the clip is held. The advance of the member 10 stops. Thereafter, when the feed plate 8 further advances, the arm holding member 11 advances with respect to the clip holding member 10 as shown in FIG.
The tie pin arms 13 rotate in the direction in which they close each other with the advance of. The legs 3 of the clip 1 are overlapped with each other by the rotation of the tie pin arm 13. At this time, the lock piece 11A is engaged with the concave portion 10a of the clip holding member 10, and the lock piece 11A is formed by the projection 8c of the feed plate 8.
And the forward movement of the arm holding member 11 is stopped. [0013] Then, the dowels of the overlapped leg portions 3 are drawn out by a caulking device (not shown), and the neck portion of the bag P is bound as shown in FIG. Thereafter, the feed plate 8 is retracted, and the reverse operation is performed, and the stopper plate 9, the clip holding member 10, the arm holding member 11, and the like return to the original positions. [0014] However, in such a clip supply device, each of the lock pieces 9A to 1A is required.
1A is urged inward and moves while slidingly contacting the side surface of the engagement wall 10, the side surface of the stopper plate 9, and the side surface of the clip holding member 10. For this reason, the lock pieces 9A to 9C and the above-mentioned side walls on which the lock pieces 9A to 9C are slidably contact are easily worn.
A to 9C are indented 9b, 10b,
15a. For this reason, there is a possibility that each of the lock pieces 9A to 9C may be damaged, and there are many problems such as a decrease in the durability of the clip feeding / forming mechanism. The present invention has been made in view of the above circumstances, and an object thereof is to supply a leading clip of a connecting clip to a binding position, and to attach a leading clip attached to a neck of a packaging bag to a conical shape. An object of the present invention is to provide a drive mechanism of a clip binding machine capable of improving the durability of each drive mechanism for forming and binding. In order to achieve the above object, according to the present invention, a clip holding portion for holding a leading clip of clips connected to each other and arranging it at a binding position is formed at a distal end. One member is provided so as to be movable in the supply direction of the clip, and a second member having a molding mechanism for forming a clip in a bound state by superimposing a leg piece of the leading clip and forming a clip in a bound state is attached to the first member with respect to the first member. A guide groove formed in the drive disc is formed in the overlapped portion of the first member and the second member so that the guide portion is loosely fitted in the overlap portion of the first member and the second member. A switching portion having a formed guide groove and a cam edge shifted toward the clip supply direction is rotatably provided on the second member, and the guide portion is provided with a guide groove formed on the first member and the second member. Engage As a result, the first member and the second member are integrally moved forward to supply the clip toward the binding position, and the cam member of the switching portion is engaged with the guide portion to cause the second member to move. The molding mechanism is operated by moving forward with respect to the first member. Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing the entirety of the clip binding machine with the upper cover of the clip binding machine employing the driving mechanism of the present invention opened. The clip bundling machine 20 is provided with a main body housing 22 at the upper end of a post erected on a support leg 21, and a clip supply mechanism for sequentially supplying connecting clips to a bundling portion, a bag, and the like. A clip forming mechanism for forming the clip into a substantially conical shape by operating the both legs of the clip attached to the neck of the mouth to overlap, a clip caulking mechanism for fixing the both legs of the overlapped clip, and these The main mechanisms constituting the clip binding machine 20 such as a motor for driving each mechanism are arranged. The connecting clip 6 is, as shown in FIG.
A clip 1 formed of a plastic thin piece having an opening 2 opened toward one end at a center portion and a pair of leg pieces 3 formed along both sides of the opening of the opening 2. However, the front ends of the two leg pieces 3 are integrally connected to the rear end edge of the front clip via the connecting portion 4 having a small cross-sectional area. The connecting clip 6 is wound into a coil and is loaded into a magazine 23 formed at the rear of the main body housing 22 and supplied to the binding portion by a clip supply mechanism in the main body housing 22 to converge and guide the neck of the bag. The two leg pieces 3 of the clip 1 are attached to the neck of the bag P disposed in the guide groove 24 positioned in the binding portion by the molding mechanism.
Are drawn into a conical shape so that the two leg pieces 3 overlap with each other, and the two leg pieces 3 of the overlapped clip 1 are connected by a caulking mechanism or a welding mechanism to complete the binding.
As shown in FIG. 11, the clip 1 is formed into a conical shape surrounding the neck of the bag P when the binding is completed. As shown in FIGS. 2, 3 and 5, a mechanism for supplying the connecting clip 6 to the binding position and binding it is a cam pin (guide portion) 26 attached to a driving disk 25 which is rotationally driven by a motor. A carrier A27 (first member) that is reciprocated by the rotation is provided so as to be slidable in the supply direction of the connecting clip 6, and the carrier A27 is provided.
A clip support portion 28 for guiding the leading clip 1 of the connecting clip 6 to the binding position is formed at the front end of the clip. As shown in FIG. 5, a cam hole (guide groove) 29 is formed at the rear of the carrier A27.
The cam pin 26 is loosely fitted therein, and the carrier A27 is reciprocated by rotating the cam pin 26 in the circumferential direction. Further, on the upper surface side of the carrier A27, a carrier B30 (second member) is disposed so as to be able to reciprocate so as to overlap the carrier A27.
A molding mechanism for molding the leading clip 1 into a conical shape is connected to the front of 0. The molding mechanism connects a pair of tie arms 32 each having a tie pin 31 at the distal end, which is rotatably supported at a central portion and is engaged with the through hole 5 of the clip 1, and the tie arm 32 and the carrier B30. When the operation link 33 is operated forward, the tie arm 32 rotates about the central pivot shaft 32a, and the tie pin 31 at the tip moves the leg 3 of the clip 1 inward. Then, the clip 1 is formed into a conical shape. At the rear of the carrier B, the carrier A
27, a cam hole 34 is formed in which the cam pin 26 projecting upward through the cam hole 29 from the lower side is loosely fitted. The cam hole 34 is formed at the rear edge 34a of the cam hole 34.
Is formed in the same shape as the cam hole 29 formed in the carrier A27, and the front edge 34b is formed so as to be shifted forward of the cam hole 29 in the clip supply direction. Further, at the rear of the carrier B30, there is provided a selector plate (switching portion) 35 arranged so as to overlap with the cam hole 34. The selector plate 35 has flanges 36 on both side edges. The carrier B is rotatably supported by side walls 30 a formed on both side edges of the carrier B via the flange 36. A cam edge 37 having the same shape as the front edge of the cam hole 29 formed in the carrier A 27 is formed at the rear edge of the selector plate 35. At one end of the cam edge 37, a guide guide surface 38 in which the cam edge 37 is inclined upward is formed. An upper end of the flange 36 of the selector plate 35 and an end wall 27a formed at the rear end of the carrier A27.
A spring 39 is stretched and arranged between the carrier B3 and the cam edge 37 of the selector plate 35.
While being urged to overlap the 0 cam hole 34,
The carrier B30 is biased rearward with respect to the carrier A27. As shown in FIG. 6, the cam pins 26 of the drive disk 25 are assembled by passing through the cam holes 29 of the carrier A 27 and projecting above the cam holes 34 of the carrier B 30. 3 and FIG. 6, the selector plate 35 is pushed up by the upper end of the cam pin 26 so that the cam pin 26 does not come into contact with the cam edge 37 of the selector plate 35, and the spring 39 The carrier B30 is disposed behind the carrier A27. On the other hand, the carrier B30 is operated forward with respect to the carrier A27 by the cam pins 26 being in contact with the cam edges 37 of the selector plate 35. The operation of the above embodiment will now be described. In the initial state, as shown in FIGS.
The cam pin 26 is arranged at the center of the cam hole 29 of the carrier A 27 and the cam hole 34 of the carrier B 30, and the selector plate 35 is arranged so as to be pushed up by the cam pin 26. In this state, both the carrier A27 and the carrier B30 are arranged at the rearmost position of the operation range, and the leading clip 1 of the connecting clip 6 is supported on the upper surface of the clip support portion 28 of the carrier A27. When the driving disk 25 is rotated from the above state and the cam pin 26 is rotated in the direction of the arrow, the cam pin 26 is turned into the cam hole 29 of the carrier A 27 and the carrier B.
The carrier A27 and the carrier B30 move forward integrally as the front edge 34b of the cam hole 34 is engaged, and the clip 1 supported by the clip support portion 28 is supplied toward the binding position. As shown in FIG. 7, the driving disk 25 is substantially 9
At the time of rotation by 0 degree, the cam pins 26 are inserted into the cam holes 29, 34.
Of the cam pin 26 in this position.
Is disengaged from the side end of the selector plate 35, the selector plate 35 is superimposed on the upper surface of the carrier B30 by the tension of the spring 39, and the cam pins 26 and the selector plate 35
Is in a state where the cam edge 37 can abut. At this point, the second and subsequent clips 1 of the connecting clip 6 are locked by a locking mechanism (not shown), and the forward movement is prevented. Further, the driving disk 25 is rotated and the cam pin 2 is rotated.
6 is slightly rotated from the position of approximately 90 degrees, the cam pin 26 engages with the linear portions of the cam holes 29 and 34, and the carrier A and the carrier B are integrally advanced. 1 is further advanced and cut between the second clip 1 and the first clip 1 is attached to the neck of the bag waiting at the binding position. At this point, as shown in FIG. 7, the cam pin 26 has reached the circular arc of the cam hole 29 of the carrier A 27, and this circular arc is formed in substantially the same shape as the rotation locus of the cam pin 26. The carrier A is stopped at a fixed position without operating. The cam pin 26 contacts the cam edge 37 of the selector plate 35 to further advance the carrier B30 through the selector plate 35. As shown in FIG. 8, when the carrier B30 advances while the carrier A27 is stopped, the operating link 33 is pushed by the carrier B, and the outer end of the tie arm 32 is pushed forward, and the tie arm 32 is moved. The clip 3 is formed into a conical shape by rotating around the central pivot shaft 32a and moving the leg 3 of the clip 1 inward by the tie pin 31 engaged with the through hole 5 of the clip 1. Thereafter, the cam pin 26 rotates along the arc of the cam edge 37 and the cam hole 29, and when the cam pin 26 is rotated to the vicinity of the end opposite to the cam hole 29, the cam pin 26 rotates. 26 reaches the guide surface 38 formed at the end of the cam edge 37 of the selector plate 35, the engagement between the cam pin 26 and the cam edge 37 of the selector plate 35 is released, and the carrier B30 is retracted by the spring 39, As a result, the operation link 33 retreats to open the distal end of the tie arm 32 and return the tie pin 31. During this time, clip 1
The overlapping portion of the leg piece 5 is fixed by a caulking mechanism (not shown) or a welding mechanism using ultrasonic waves or the like, and the binding of the neck of the bag P by the leading clip 1 is completed. Further, the driving disk 25 is rotated to rotate the cam pins 2.
When the pivot 6 rotates, the cam pin 26 comes into contact with the guide surface 38 of the selector plate 35 to rotate the selector plate 35 upward, so that the cam pin 26 enters the lower surface side of the selector plate 35 and the cam pin 26 The hole 29 abuts along the rear side surface 34a of the cam hole 34 of the carrier B,
The carrier A and the carrier B are returned together to return to the standby state of FIG. Note that carrier A and carrier B
When the retracting operation is performed, a check mechanism (not shown) is operated to prevent the connecting clip 6 from retracting together with the carrier A27 and the carrier B30. As described above, according to the driving mechanism of the present invention, the cam holes 29, 3 are driven by the cam pins 26 of the driving disk 25 on the carriers A27 and B30.
The carrier A27 and the carrier B30 are integrally moved forward by the rotation of the cam pin 26 to supply the connecting clip, and the carrier B3 is formed.
A selector plate 35 having a cam edge 37 shifted in the operating direction from the cam hole 34 of the zero is disposed so as to be overlapped with the cam hole 34 of the carrier B30, and the cam pins 26 are engaged with the cam edge of the selector plate 35. The carrier A27
Is stopped, and only the carrier B30 is advanced to operate the molding mechanism, so that the locking piece is engaged and disengaged as in the related art, so that it is possible to perform an impulsive operation by interlocking and stopping. Instead, it is possible to operate smoothly by forming the cam shape as desired. In addition, the durability of the drive mechanism can be improved without increasing the sliding resistance and abrasion of the components due to the sliding of the lock pieces by spring bias.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a clip binding machine implementing a driving mechanism of the present invention. FIG. 2 is a plan view showing a configuration of a clip supply / forming mechanism of the clip binding machine shown in FIG. 3 is a vertical sectional side view of the clip supply / molding mechanism of FIG. 2; FIG. 4 is a vertical side view of the clip supply / molding mechanism of FIG. 3 in a state where the clip is advanced; FIG. 6 is a perspective view showing an assembled state of each member in FIG. 5; FIG. 7 is a plan view of a clip supplying / forming mechanism in a state where a leading clip is supplied to a binding position; FIG. 8 is a plan view of the clip supply / molding mechanism in a state where the clips attached to the bag are bound and formed; FIG. 9 is a plan view of the state in which the clip supply / molding mechanism is returned to operation; FIG. Connecting clips used in clip tying machines FIG. 11 is a perspective view of a packaging bag bound by a clip. FIG. 12 is a plan view of a conventional clip supply / forming mechanism in a standby state. FIG. 13 is a state in which a clip is supplied to a binding position. FIG. 14 is a plan view of a conventional clip supply and molding mechanism. FIG. 14 is a plan view of a conventional clip supply and molding mechanism in a state in which a leading clip is separated and attached to a neck of a bag. Plan view of conventional clip supply / molding mechanism in molded state [Description of symbols] 1 Clip 2 Opening 3 Leg piece 4 Connecting part 5 Through hole 6 Connecting clip 20 Clip binding machine 21 Support leg 22 Main body housing 23 Magazine 24 Guide Groove 25 Drive disk 26 Cam pin (guide portion) 27 Carrier A (first member) 28 Clip support portion 29 Cam hole (guide groove) 30 Carrier B (second member) 31 Tie Down 32 Taiamu 33 operation link 34 cam hole (guide groove) 35 Selector plate (switching unit) 36 flange 37 Kamuen 38 induction guide surface 39 spring

Claims (1)

Claims: 1. A clip formed of a plastic thin piece having a pair of leg pieces formed on both sides of an opening opened toward one end and attached to the neck of a bag. In a clip bundling machine for bundling a neck portion of a bag by superimposing pieces, a clip holding portion for holding a leading clip of mutually connected clips and arranging the leading clip at a binding position is formed by attaching a first member formed at the tip to the clip. A second member having a molding mechanism, which is provided movably in the supply direction and is configured to form the clip into a bound state by superimposing the leg pieces of the leading clip, is connected to the distal end portion of the second member. A guide portion is provided so as to be movable in a supply direction, and a guide portion formed on a driving disk is loosely fitted to an overlapping portion of the first member and the second member, and formed on the first member. The switching unit forming a cam edge which is displaced id groove and the clip feed direction rotatably disposed in the second member, the guide portion first
The first member is engaged with a guide groove formed in the second member.
The member and the second member are integrally moved forward to supply the clip toward the binding position, and the cam member of the switching portion is engaged with the guide portion to move the second member to the first member. A driving mechanism in the clip tying machine, wherein the driving mechanism is moved forward to operate the molding mechanism.