JPH08156923A - Binding jig twisting device of bag binder - Google Patents

Abstract

PURPOSE: To enhance the certainly of binding operation in a bag binder by applying a binding jig composed of a resin plate to the opening part of a bag made of a resin such as polyethylene to tie the opening part. CONSTITUTION: The binding jig twisting device of a bag binder is constituted of the cylindrical forming jig 49 fixed to a sub-frame 47 and a twisting arm 46 traversing the front opening part of the forming jig 49. The twisting arm 46 is attached to one side surface of a gear 45 and the axis of the forming jig 49 coincides with the center of rotation of the twisting arm 46. A rib 51 is provided to the inner peripheral surface of the forming jig 49. The binding jig 1 sent by a feed mechanism is externally fitted to the binding region of a bag and twisted by the twisting arm 46 to allow both leg parts 2 to cross and hook parts are mutually engaged to bind the bag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag binding machine for binding bags with a resin binding tool, and more particularly to a binding device twisting device for the bag binding machine.

[0002]

2. Description of the Related Art Conventionally, as a binding machine for binding the opening of a plastic bag made of polyethylene or the like containing foods, one using cellophane tape, one using a vinyl cord with a wire as a core wire, etc. It has been known. On the other hand, the applicant of the present application has found that the clip-type tying device has a high binding holding performance, is easily attached and detached, and can be repeatedly used (Japanese Patent Application No. 4-264263).
No. 5), and a binding machine (Japanese Patent Application No. 5-49916) that automatically fastens the binding tool to the opening of the bag.

As shown in FIG. 4, the binding tool 1 is a substantially gate-shaped resin flat plate, and the inner peripheral portions of both leg portions 2 are provided with a claw portion 3 in the shape of an internal gear, and the leg portions 2 are The tip is inverted to form the hook portion 4. Then, a large number of binding tools 1 are formed in a state in which both legs 2 are aligned at the top and are connected in a belt shape in a row, and are wound in a roll shape and loaded into a binding machine.

FIG. 5 shows the above-mentioned binding machine 11, and the belt-shaped binding tool 1 housed in the binding tool magazine 12 at the rear portion (left in the figure) is attached to the slider assembly 14 of the binding tool feeding mechanism 13. The ratchet pawls (not shown) provided are sequentially fed to the binding device twisting device 15. Then, the connecting portion between the leading binding tool 1 and the binding tool 1 in the next row is cut by a cutter that interlocks with the ratchet pawls of the binding tool feeding mechanism 13, and the twisting arm 16 of the binding tool twisting device 15 moves. Rotate and twist the first binding tool 1. The tip end of the binding tool 1 is restricted in rotation by the forming jig 17 of the binding tool twisting device 15, and the binding tool 1 is twisted and bent into a funnel shape, so that the hook portion 4 at the tip crosses. Be hung.
Therefore, if the opening portion of the resin bag is inserted and converged into the guide groove 18 provided between the binder feeding mechanism 13 and the binder twisting device 15 from above, the series of operations described above will be performed. First, the binding tool 1 is externally fitted to the converging portion of the bag, and then the binding tool 1 is twisted to bind the vicinity of the opening portion of the bag 19 with the binding tool 1 as shown in FIG.

As shown in FIG. 7, the binding device twisting device 15
Is a subframe 2 fixed to the frame of the binding machine 11.
0, a forming jig 17, a gear 21, and a twisting arm 16 fixed to one side surface of the gear 21. A gear support shaft 22 is fixed to the subframe 20, and the gear 21 is loosely fitted to the gear support shaft 22.
The forming jig 17 is fixed to the tip of the screw 2 by the screw 23.

As shown in FIG. 8, the forming jig 17 is provided with two forming blocks 25 and 26 which are erected so as to face each other on a substrate 24 having a shape in which one side of a disk is cut out. Further, as shown in FIG. 7B, the twisting arm 16 bends in a crank shape when viewed from the front and crosses the front surface of the forming jig 17, and is fed as shown in FIG. 7A. The twisting arm 16 is inserted between the two leg portions 2 and 2 of the binding tool 1 so that the twisting arm 16 and the binding tool 1 cross each other.
In this state, when the twisting arm 16 is rotationally driven counterclockwise in FIG. 7B via the reduction gear mechanism 27 shown in FIG. 5, both legs 2 of the binding tool 1 are twisted and both legs are Forming block 2 is provided at the tip of each part 2.
Both legs 2 bend and intersect by abutting against 5, 26 and being restricted in rotation. Then, when the twisting arm 16 rotates to a certain angle, the engagement between the two leg portions 2 and the twisting arm 16 is released, and when the binding tool 1 returns to the initial shape by the elastic restoring force, the two leg portions intersecting with each other. The two hook portions 4 are engaged with each other, and the binding tool 1 is fastened to the bag 19 as shown in FIG.

However, when the twisting arm 16 is rotated, when the leg portions 2 of the binding tool 1 open outward and come into contact with the leg portion 16a of the twisting arm 16 as shown in FIG. There is a case where one leg 2 is tilted upward or downward and one leg 2 is disengaged from the forming blocks 25 and 26 so that they cannot be bound.

[0008]

In the conventional bag binding machine, when the binding tool is twisted, the posture of the binding tool may change and the binding may fail. Therefore, there arises a technical problem to be solved in order to improve the certainty of the binding operation and improve the reliability, and the present invention aims to solve the above problem.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above object, and is a clip in which the tip portions of both leg portions of a synthetic resin gate-shaped flat plate are turned outward to form hook portions. A bag tying machine using a shape tying device, a tying device feeding mechanism for feeding the tying device with both legs thereof at the head, and a tying device twisting device facing the tying device feeding mechanism, A guide groove for converging and inserting the opening portion of the bag between the binding member feeding mechanism and the binding device twisting device is provided, and the binding device twisting device includes a twisting arm for twisting the binding device. A rotary jig for rotating the twisting arm, and a forming jig fixed for restricting and bending the leg of the binding tool rotated by the twisting arm. Both leg portions of the binding tool are fitted onto the converging portion of the bag of In a bag tying machine that twists both legs of the tie in a crossed state and engages a pair of the hooks with each other to bind the opening of the sack, the inner diameter of the tie is approximately equal to the entire width of the tie. An axial rib is provided on the inner peripheral surface of the cylindrical member to form a forming jig, and the opening of the forming jig is fixed so as to face the binder feeding mechanism, and the opening is formed on the front surface of the opening. It is intended to provide a binding device twisting device of a bag binding machine, which is characterized in that a twisting arm is provided.

[0010]

The binding sent by the binding feeding mechanism is fitted onto the converging portion of the bag inserted in the guide groove between the binding feeding mechanism and the binding twisting device, and both legs are It is inserted into a cylindrical forming jig straddling the twisting arm of the binding twisting device. The twisting arm is rotationally driven to twist both legs of the binding tool, and one leg comes into contact with a rib provided on the inner peripheral surface of the forming jig to restrict movement in the rotation direction,
The other leg is further twisted, and the binding tool elastically deforms like a funnel. When the legs cross and the flexure of the binding exceeds a certain limit, the engagement between the legs and the twisting arm is disengaged, and when the legs return to the initial state, the hooks at the tips of the legs do not interact with each other. And the bag is bound.

When the twisting arm rotates, both legs of the binding are inserted into the cylindrical forming jig, so that neither leg expands nor the posture of the binding is displaced. Failure to bind due to poor engagement between the legs and the twisting arm is prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a bag binding machine 31, and an outer casing 32.
The binder feeding mechanism 13, the reduction gear mechanism 27, and the like built in the same are the same as those described above as the conventional example. When the opening of the resin bag is converged and inserted into the guide groove 18 provided downward from the upper surface of the front part of the outer casing 32, the trigger arm 3
3 is pressed by the bag and rotated downward, and the trigger switch 34
Turns on and the motor 35 starts. And the motor 35
Rotates the main gear 36 via the reduction gear mechanism 27.
The eccentric pin 37 provided on the side surface of the main gear 36 is engaged with the cam plate 38 of the slider assembly 14 of the binder feeding mechanism 13, and the slider assembly 14 moves forward and backward when the main gear 36 makes one rotation. 1 reciprocating drive, and the ratchet claw (not shown) pivotally attached to the front part of the slider assembly 14 sends the connecting-type binding tool 1 forward, and the binding tool 1 is guided to the bag converging portion in the guide groove 18. Fit on the outside. When the slider assembly 14 reaches the foremost position in the front-rear movement range, a cutter that interlocks with the ratchet pawl cuts the connecting portion between the leading binding tool and the binding tool in the next row, and the slider assembly 14 moves backward and the main gear 36 moves. The gear surface of the intermittent gear 39 fitted coaxially with the drive gear 4 of the binder twisting device 40 (hereinafter simply referred to as the twisting device).
The drive gear 41 is started when it reaches the position where it meshes with 1.
The rotation of the drive gear 41 is transmitted to the gear 45 of the twisting device 40 via the bevel gear 42, the gear shaft 43, and the spur gear 44 fitted to the front part of the gear shaft 43, and the twisting arm attached to the gear 45. Rotate 46.

FIG. 2 shows a twisting device 40, in which a gear 45 is attached to a subframe 47 via a gear support shaft 48. One end of the gear 45 is formed in a disk shape having a diameter larger than the gear surface, and the leg portions 46a of the gate-shaped twisting arm 46 are inserted and attached at two opposing points in the vicinity of the outer peripheral portion of the disk portion 45a. There is. The intermediate portion of the twisting arm 46 is bent in a crank shape when viewed from the front as shown in FIG. A forming jig 49 is fixed to the tip of the gear support shaft 48 with a screw 50.

The forming jig 49 has a cylindrical shape with one end open, and is attached with the opening facing the feeding device 13. The outer diameter of the forming jig 49 is the twisting arm 4
The diameter is slightly smaller than the distance between the two legs 46a of 6,
Both legs 46a of the twisting arm 46 rotate around a fixed forming jig 49.

The inner diameter of the forming jig 49 is equal to that of the binder 1.
The width of the binding tool 1 is formed to be substantially the same as or slightly smaller than the entire width of the binding tool 1 inserted into the forming jig 49 to prevent the binding tool 1 from moving vertically and horizontally. Further, as shown in FIG. 3, axial ribs 51 are provided on the inner side surface of the forming jig 49, and the leg portions 2 of the binding tool 1 come into contact with each other at a predetermined angle when the twisting arm 46 rotates. Be bent.

As described above, the binder 1 is fed by the feeding mechanism 13 and the leading binder 1 bent as shown in FIG. 2 by the guide path (not shown) is the bag in the guide groove 18. And the intermediate portion 46b of the twisting arm 46 is externally fitted to the binding tool 1
The two leg portions 2 are inserted into the forming jig 49.

Then, at the same time that the first binding tool 1 is cut from the next binding tool, the gear 45 of the twisting device 40 is driven and the twisting arm 46 is rotated, so that both legs 2 of the binding tool 1 are moved. Twist. At this time, one leg 2 comes into contact with the rib 51 and is significantly bent, and the other leg 2 is further rotated by the twisting arm 46, and the binder 1 is elastically deformed into a funnel shape so that both legs 2 intersect. To do. Then, when both legs 2 are bent by a certain amount or more and disengaged from the twisting arm 46, and when the intersecting legs 2 are restored by the elastic restoring force, both legs 2 as shown in FIG. The hook portion 4 of 2 is engaged and the bag 19 is bound.

When the twisting arm 46 makes one rotation and returns to the rotational position shown in FIG. 2, the mechanical self-holding circuit of the bag binding machine 31 is turned off, the motor 35 is stopped, and the binding operation of one cycle is performed. To finish.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made within the technical scope of the present invention, and the present invention does not extend to those modifications. Of course.

[0020]

As described in detail in the above-mentioned embodiment, the present invention inserts both legs of a binding tool into a cylindrical forming jig and twists them. Sometimes, the posture of the binding tool does not tilt and the leg portion of the binding tool does not come off from the twisting arm or the forming jig. Therefore,
Both leg portions of the binding tool can be reliably crossed, occurrence of a binding failure can be prevented, and the stability and reliability of the binding machine can be improved.

[Brief description of drawings]

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

2 shows the twisting device in FIG. 1, (a) is a side sectional view, and (b) is a front view.

3 shows the forming jig of FIG. 2, (a) is a rear view, (b) is a side sectional view, and (c) is a front view.

FIG. 4 is a front view of the binding tool.

FIG. 5 is a side view of a conventional bag binding machine.

FIG. 6 is an explanatory diagram showing a bundling state of bags.

FIG. 7 shows the twisting device in FIG. 5, (a) is a side sectional view, and (b) is a front view.

8 shows the forming jig of FIG. 7, (a) is a plan view, (b) is a rear view, (c) is a side view, and (d) is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Binding tool 2 Leg part 3 Claw part 4 Hook part 13 Binding tool feeding mechanism 14 Slider assembly 18 Guide groove 19 Bag 31 Bag binding machine 40 Binding tool twisting device 41 Drive gear 42 Bevel gear 43 Gear shaft 44 Spur gear 45 Gear 46 Twisting arm 49 Forming jig 51 Rib

Claims (1)

[Claims] 1. A bag tying machine using a clip-type tying tool (1) in which the tips of both legs (2) of a gate plate made of synthetic resin are turned outward to form hooks (4). , A binding member feeding mechanism for feeding the binding device (1) with both legs (2) of the binding device at the top, a binding device twisting device facing the binding device feeding mechanism, and the binding device feeding mechanism A guide groove (18) for converging and inserting the opening portion of the bag between the bag and the binding device twisting device, wherein the binding device twisting device twists the binding device and the twisting arm. The rotation arm includes a rotation driving mechanism and a forming jig fixed to restrict and bend the leg movement of the binding tool rotated by the twisting arm. The forming jig is provided in the guide groove (18). Both leg portions (2) of the binding tool (1) are externally fitted to the converging part of the bag, and the twisting arm is used to attach the binding tool (1) to the binding tool (1). Twist both legs (2) to intersect,
In a bag binding machine for binding a pair of the hook portions (4) to each other to bind the opening of the bag, the inner circumference of a cylindrical member having an inner diameter substantially equal to the entire width of the binding tool (1). An axial rib (51) is provided on the surface to form a forming jig (49), and the opening of the forming jig (49) is fixed so as to face the binder feeding mechanism (13). A binding tool twisting device for a bag binding machine, wherein the twisting arm (46) is disposed on the front surface of the opening.