JP3487326B2 - Bag mouth convergence mechanism in binding machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding machine that binds a bag mouth of a bag containing appropriate articles, so that the bag mouth can be converged so as to be suitable for binding the bag mouth. The present invention relates to a bag mouth convergence mechanism. 2. Description of the Related Art Conventionally, as a binding machine for binding a bag mouth of a plastic bag, a first contact portion and a second contact portion are substantially V-shaped near a guide passage for guiding the bag mouth of the bag. A plate-shaped converging member formed in a shape is rotatably arranged, and in the initial state, the first contact portion extends into the guide passage, and the second contact portion is retracted from the guide passage. When the bag is pushed into the guide passage while the front portion of the mouth is pressed against the first contact portion, the second contact portion extends over the guide passage and converges the bag mouth with the guide passage and the converging member. Was. [0003] However, in the convergence mechanism of the vinyl bag mouth in the binding machine described above, the first contact portion and the second contact portion are formed on the same plane. Therefore, only the upper part of the bag mouth can be squeezed, and when a lot of contents are stored in the bag, the portion to be bound by the binding member may be widened and the bag mouth may not be bound by the binding member. In addition, since the bag cannot be reliably converged, the vicinity of the bag mouth must be squeezed by twisting it by hand in advance,
There was a problem in both the operability and the binding effect. The present invention solves the above-mentioned problems and can easily and reliably converge the bag mouth without bothering the operator, thereby improving operability, improving work efficiency and improving the quality of binding. It is an object of the present invention to provide a bag mouth convergence mechanism in a binding machine capable of achieving the following. [0005] In order to solve the above problems, a bag opening convergence mechanism in a binding machine according to the present invention includes a bag bag to be bound in a binding portion provided in a binding machine body. A first guide passage is formed on the upper and lower shafts rotatably provided near the guide passage so as to protrude toward the guide passage and contact the front and rear of the bag mouth. An abutment portion and a second abutment portion are formed back and forth, the first abutment portion is formed so as to extend on the guide passage, and the second abutment portion is formed at an initial stage of rotation. In the state, it is located at a position retracted from the guide passage, formed so as to extend on the guide passage in the middle of rotation, and when the bag mouth is moved to the binding portion along the guide passage, the bag mouth is closed. The front side is brought into contact with the first contact portion, and the first contact portion is rotated around the support shaft. In the course of this rotation, the second contact portion extends over the guide passage and pushes the rear side of the bag mouth to move. FIG. 1 shows a binding machine. The binding machine has a curved guide passage opening at the upper and lower surfaces of a binding machine main body 1 and tapering from the side toward the inside forward. When the bag mouth 3a of the bag 3 such as a plastic bag is pushed down to the end of the guide passage 2 along the guide passage 2, the control unit 3
0 operates the motor 31 to operate the feeding device 32 of the sheet-shaped clip 4 to fit the clip 4 into the bag mouth 3a, and at the same time, cross the ends of the fitted clip 4 to caulk the overlapping portion with the binding portion 33. By doing so, the bag mouth 3a of the bag 3 is bound as shown in FIG. In the vicinity of the guide passage 2, FIG.
As shown in FIG. 2, a bag mouth convergence mechanism A for converging the bag mouth is provided. The bag mouth convergence mechanism A includes a first contact portion 6 and a second contact portion 7 which are respectively formed on upper and lower portions of a pivot 5 which is rotatably provided so as to protrude toward the guide passage 2. A switch 9 for detecting that the converging member 8 has been rotated to a predetermined position;
And a spring 10 which constantly urges the spring to return. As shown in FIG. 4, the support shaft 5 is formed upright on the second contact portion 7 and penetrates through a bearing hole 17 of the lower substrate 15 and a bearing hole 18 of the upper substrate 16. The first contact portion 6 projects from the top surface of the stop ring 2 at the tip thereof.
It is attached at 0. A guide shaft 21 is erected near the support shaft 5, and penetrates an arc-shaped opening 22 formed on the lower substrate 15 and an arc-shaped opening 23 formed on the upper substrate 16. The first contact portion 6 and the second contact portion 7 project from the upper substrate 16 through the first contact portion 6, further penetrate the first contact portion 6, and have a stop ring 25 attached to the end thereof. It is formed to rotate in conjunction with the support shaft 5. The first abutting portion 6 is a disc-shaped plate member having an engaging piece 26 protruding in a tangential direction, and a tip of the engaging piece 26 is formed on a guide passage 2 a formed in the upper substrate 16. Extends. A projecting piece 27 is formed on a part of the peripheral surface opposite to the engaging piece 26 so as to project downward, and the projecting piece 27 is formed on the upper substrate 16 in an arc shape formed concentrically with the support shaft 5. Projecting downward from the opening 28. Furthermore, the support shaft 5
A coil spring 10 is fitted on the lower substrate 15. One end of the spring 10 is fixed to the lower substrate 15 by appropriate means, and the other end is engaged with the guide shaft 21, and the converging member 8 is engaged with the engagement piece 26 at the entrance of the guide passage 2. In the direction of rotation about the support shaft 5. The second contact portion 7 is a substantially rectangular plate member, which can rotate on the lower surface of the lower substrate 15.
a is formed in an arc shape according to the shape of the side surface so as not to protrude from the side surface of the binder body 1, and the lower substrate 15
The guide passage 2b is disposed so as to be retracted from the guide passage 2b, and is formed so as to extend above the guide passage 2b during rotation. A screw 29 is provided on the back side surface of the upper substrate 16 on the locus of movement of the projecting piece 27 formed on the first contact portion 6.
The switch 9 is fixed. When the first contact portion 6 rotates to the vicinity of the end of the guide passage 2 and the guide shaft 21 abuts on the end of the opening 23, the protruding piece 27 contacts the lever 9 a of the switch 9. The convergence member 8 is rotated at a position where the convergence member 8 rotates, and the protruding piece 27 pushes the lever 9a to turn on the switch 9, thereby detecting that the convergence member 8 has completely rotated. The state of the switch 9 is constantly monitored by the control unit 30. When the switch 9 is turned on, the control unit 30 determines that the convergence member 8 has completely rotated, and operates the motor 31 to perform the binding operation. Is configured. According to the bag mouth convergence mechanism having the above structure, as shown in FIG. 5, the bag mouth 3a is grasped with one hand and the bag 3 is grasped with the other hand.
The front part of the bag mouth 3a is brought into contact with the first contact part 6 from the entrance of the guide passage 2 while supporting the lower part of the
Against the inside of the guide passage 2. The first contact portion 6 and the second contact portion 7 are connected to the support shaft 5 and the guide shaft 21.
, The second contact portion 7 also rotates in conjunction with the rotation of the first contact portion 6. Since the tip of the second contact portion 7 extends onto the guide passage 2 from the middle of the rotation, the second contact portion 7
Rotates while pushing the back side of the bag opening 3a. Guideway 2
Are tapered toward the end and a second
Contact portion 7 is in contact with the lower portion of the bag mouth 3a.
The lower part of a can be surely converged without expanding. When the bag mouth 3a is pushed to the end of the guide passage 2 and the first contact portion 6 is rotated until the guide shaft 21 contacts the end of the opening 23, the protruding piece 27 moves the lever 9a of the switch 9. Switch 9 is pressed
N. When the switch 9 is turned on, the control unit 30 sets the bag opening 3a.
Is securely pushed into the inner part of the guide passage 2, the bag mouth 3 a is determined to have converged, the motor 31 is operated, and the binding portion is moved to bind the bag mouth 3 a with the clip 4. When the binding is completed and the operator removes the bag 3 from the binding machine, the convergence member 8 is urged by the spring 10 until the guide shaft 21 abuts on the front end of the opening 23, and returns. The first contact portion 6 is returned to the entrance side of the guide passage 2 and the second contact portion 7 is retracted from the guide passage 2 to prepare for the next binding operation. As described above, the front portion of the bag mouth 3a comes into contact with the first contact portion 6 and is pushed to the end of the guide passage 2, so that the first contact portion 6 is opened by the guide shaft 21. 23 until it comes into contact with the end of
Of the bag mouth 3a is pushed into the guide passage 2 so as to push the rear part of the bag mouth 3a from behind, and is pushed so as to press the lower part of the bag mouth 3a, so that the bag mouth 3a is surely converged without expanding in the guide passage 2. And the bag mouth 3a can be securely bound to the clip 4. According to the bag mouth convergence mechanism according to the present invention, the first contact portion is located above the support shaft, that is, above the guide passage, at the position of the hand of the worker holding the bag mouth. , The operation switch of the binding device is automatically turned on when the first contact portion rotates to the binding portion, and when the hand reaches the binding portion, the binding device is turned on. Operate, and the operability is improved. Also, the second contact portion is located at the lower portion of the support shaft, that is, near the guide passage, and pushes the rear side of the bag mouth, so that the rear side of the bag mouth is located at substantially the same position as the second contact portion. And does not remain behind, but is converged toward the front of the second contact portion. Therefore, there is no need for the operator to twist the bag mouth and insert it into the guide passage, and the work can be performed easily and reliably.

[Brief description of the drawings] FIG. 1 is a perspective view of a binding machine. FIG. 2 is a perspective view showing a binding state of a bag. FIG. 3 is a plan view of the binding device. FIG. 4 is a perspective view showing a configuration of a converging unit. FIG. 5 is a perspective view showing a use state of the binding machine. [Explanation of symbols] 1 Binding machine body 2 Guideway 3 bags 3a bag mouth 4 clips 5 spindle 6 First contact part 7 Second contact part

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65B 67/00 B65B 67/06 B65B 51/04 B65B 7/02

Claims (1)

(57) [Claims 1] A guide passage for guiding a bag mouth of a bag to be bound is formed in a binding portion provided in a binding machine main body, and is rotated near the guide passage. A first contact portion and a second contact portion, which protrude toward the guide passage side and contact the front and rear of the bag mouth, respectively, are formed on the upper and lower portions of the freely erected support shafts; The first contact portion is formed so as to extend on the guide passage, and the second contact portion is at a position retracted from the guide passage in an initial state of rotation, and the guide portion is in the middle of rotation. When the bag mouth is moved to the binding portion along the guide passage, the front side of the bag mouth is brought into contact with a first contact portion to form a first abutment. Part is rotated around the support shaft, and in the middle of this rotation, the second abutting part extends on the guide passage and is located on the rear side of the bag mouth. Bag mouth gathering device in strapping machine is characterized in that so as to move by pressing.