JPH0468207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a tape rewinding mechanism used in a binding device that wraps a binding tape around objects to be bound, such as vegetables, to bind the objects. It is something.

(Prior Art) Conventionally, as shown in Japanese Patent Publication No. 57-40008 as an example of a tape rewinding mechanism of a binding machine, a binding tape mounted on a tape reel is guided to a tape holding device through a binding arm. , the cut end of the binding tape is held by the tape holding device, the object to be bound is brought into contact with the stretched portion of the binding tape between the binding arm and the tape holding device, and the binding tape is pulled out. At the same time, the binding tape is wound around the object to be bound, and the tape reel is rotated in the unwinding direction in association with the tilting movement of the binding arm, so that the object to be bound is wound tightly and the binding arm and the tape holding device collide. There is a device in which the ends of the binding tape wound around the object to be bound are crimped and cut at the matching crimping position to form a tight bundle.

(Problem to be Solved by the Invention) By the way, the binding machine has a tape holding device that securely holds the cut end of the newly formed binding tape on the tape reel side after the binding of the objects to be bound is completed. However, in conventional binding devices, after crimping and cutting the wound end of the binding tape, the tape reel rotates and pulls the binding tape in the unwinding direction. The cut end may be stretched so that there is not enough gripping space, or
In the worst case, the tape may fall off the tape holding means.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and its purpose is to securely hold the cut end of the binding tape on the tape reel side after the wound end of the binding tape is crimped and cut. The present invention provides a tape rewinding mechanism for a binding device.

(Means for Solving the Problems) In order to achieve the above object, the present invention guides the binding tape mounted on the tape reel to the tape holding device via the binding arm, and cuts the cut end of the binding tape. is held by the tape holding device, and while the object to be bound is brought into contact with the tensioned part of the binding tape between the binding arm and the tape holding device and the binding tape is pulled out, the binding tape is applied to the object to be bound. The tape reel is rotated in the unwinding direction in conjunction with the tilting movement of the binding arm, and the object to be bound is wound tightly, and the object to be bound is wound at a crimping position where the binding arm and the tape holding device abut each other. In a tape rewinding mechanism of a binding device that is configured to crimp and cut the wound ends of binding tape wound around an object to form a tight bundle, the tape rewinding mechanism is interlocked with the binding arm when the binding arm reaches the crimping position. The present invention is characterized in that a feeding means for feeding out the binding tape is provided.

The feeding means includes a sector gear that is pivotally supported by the binding arm and can freely mesh with the gear that rotates the tape reel, and a fan gear that is pivotally supported by the binding arm and engages with a pin provided on the sector gear, so that the binding arm is tilted to the maximum. and an engagement plate that sometimes releases the engagement.

(Function) Since the present invention is configured in this manner, when the binding arm is tilted, the engagement plate engages with the pin of the sector gear and rotates the sector gear, and when the binding arm is tilted to the maximum, the engagement plate and the sector gear are rotated. The engagement with the gear is released and the sector gear rotates in the opposite direction, thereby rotating the tape reel in the payout direction via the gear and paying out the binding tape, so that no force is applied to the binding tape in the unwinding direction.

(Example) Below, an example of the present invention will be described based on the drawings.

In Figures 1 and 2, 1 is a base, and this base 1 is provided with a pair of machine frames spaced apart in the width direction.Here, only one machine frame is shown in the figure. This machine frame is marked with numeral 2. A shaft 3 and a guide hole 4 are provided at the front of the machine frame 2, and the guide hole 4 has an arc shape. A binding arm 5 is attached to the shaft 3.
is rotatably provided, and this binding arm 5 is biased in the upright direction by a spring (not shown), and a guide pin 6 is implanted at its rotation base, and its tip end is inserted into the guide hole 4. A rotating shaft 7 is provided at the rear of the machine frame 2. A tape reel 8 is attached to the rotating shaft 7 from the back side of the machine frame 2, and a transmission gear 9 and a clutch 10 are attached from the front side of the machine frame 2. A spring (not shown) is installed between the two so as to surround the rotating shaft 7,
The transmission gear 9 is biased in a direction away from the machine frame 2 by this spring. The transmission gear 9 is loosely fitted onto the rotating shaft 7 and is slidable in the axial direction, and engagement pins 11, 11, 11 are protruded from one surface of the gear at three locations in the weekly rotation direction. . The clutch 10 has an engagement protrusion 12 formed on its circumference that protrudes radially outward and faces the rotation range of the engagement pins 11, 11, 11. This clutch 10 is a one-way clutch (not shown) connected to the rotating shaft 7.
It is fixed through.

The transmission gear 9 forms part of a binding tape rewinding mechanism, and a sector gear 13 is provided on the shaft 3, and between the sector gear 13 and the transmission gear 9,
A two-stage gear 14 is provided, the sector gear 13 is meshed with the small diameter portion 14A of the two-stage gear 14, and the transmission gear 9 is engaged with the large diameter portion 14A of the two-stage gear 14.
It is engaged with B. The fan gear 13 has a pin 15
is planted, and this sector gear 13 has pin 1.
5 is planted, and roller 1 is attached to this pin 15.
6 has been planted. The guide pin 6 has an engaging plate 1.
7 is loosely fitted, and the engagement plate 17 has an engagement portion 18.
is formed, a suspension pin 19 is provided protrudingly, a spring 20 is stretched between the suspension pin 19 and the shaft 3, and the engagement plate 17 is attached in a direction in which its engagement portion 18 comes into contact with the roller 16. Forced.

A stopper member 21 is fixed to the machine frame 2 with screws 22, and an engagement surface 23 is formed on the stopper member 21. One side 24 of the engagement plate 17 is brought into contact with the engagement surface 23, and the engagement plate 17 rotates about the guide pin 6 while each side 24 is in contact with the engagement surface 23. It's like that. When the binding arm 5 is in the upright state, the sector gear 13 engages with the pin via the roller 16, so that the sector gear 13 engages with the pin via the engagement plate 17 as shown in FIG.
The two-stage gear 14 is configured to be rotated in the direction of arrow A using the shaft 3 as a fulcrum and lifted up, and the two-stage gear 14 is configured to rotate in the direction of arrow B as the sector gear 13 rotates in the direction of arrow A. There is.

A binding tape 25 for binding objects to be bound is attached to the tape reel 8. Here, adhesive tape is used as the binding tape 25,
The leading end of the binding tape 25 is guided through the binding arm 5 toward a tape holding device (not shown) that holds the cut end of the binding tape 25. When the binding arm 5 is tilted, the binding tape 25 is rotated in a rewinding direction that removes the slack in the binding tape 25 that extends toward the tape holding device via the binding arm 5, and when the binding arm 5 is in an upright state. Sometimes, a tape reel 8 is used to facilitate the insertion of objects to be bound.
When the binding arm 5 tilts and reaches the crimping position where it matches the tape holding device, the tape is crimped and cut by crimping means and cutting means (not shown). It's getting old. The rotation transmission means 26 for transmitting the rotation of the tape reel 8 of the article to be bound described above is generally composed of a transmission gear 9, a clutch 10, a lever 27, and a cam member 29. This cam member 29 is the large diameter portion 14B of the two-stage gear 14 here.
It is attached over half the circumference in the circumferential direction. Here, the lever 27 has arms 30, 30.
and an arm portion 31, and is configured to rotate about a pin 32 as a fulcrum. The transmission gear 9 has a cylindrical portion on the other side, and this cylindrical portion includes:
An annular groove 33 is formed on the circumferential surface thereof, and an engaging protrusion 34 is formed on the arm portion so that the engaging protrusion 34 engages with the annular groove 33. Lever 27
is biased in the direction in which the engagement pin of the transmission gear 9 engages with the engagement protrusion 12, and the end of the arm portion 31 is brought into contact with the cam member 29 and cooperates with the cam member 29. This serves to engage and separate the engagement protrusion 12 and the engagement pin. The cam member 29 has a flat surface between two sloped surfaces that slope away from the inner surface of the large diameter portion 14B of the two-stage gear 14 in the direction from point X to point Y. The area between Y and point Z is a flat surface, and the surface closer to point Z has a lever operating portion 29A screwed in the direction from point Z to point Y and closer to the outer surface of the machine frame 2. It is fixed in place. When the binding arm 5 is in the upright state, the arm portion 31 of the lever 27 is in contact with a flat surface between points Y and Z, and the lever 27 resists the urging force of a spring (not shown). The clutch 10 and the transmission gear 9 are rotated in a direction in which the engagement between the clutch 10 and the transmission gear 9 is released.

The engagement plate 17 and the sector gear 13 roughly constitute a binding tape feeding means, and the sector gear 13
A rotation regulating protrusion is formed on the rotation base.
The engagement plate 17 is arranged so that the binding tape 25 is wound around the object to be bound, and the winding end of the binding tape 25 wound around the object reaches a crimping position where the binding arm 5 abuts against the tape holding device. As a result, after being crimped and cut, the engagement with the roller 16 is released as shown in FIG. 2, and it is rotated and lifted to the position shown by the solid line in FIG. sector gear 13
After this crimping and cutting, it becomes free to rotate and falls due to its own weight, and is rotated in the direction of arrow C until its rotation regulating protrusion 35 comes into contact with the guide pin 6, thereby being rotationally driven. This rotation is transmitted to the clutch 10 via the transmission gear 9,
The tape reel 8 is rotated in the direction in which the binding tape 25 is fed out, and a predetermined amount of the binding tape 25 is fed out. For this reason, the unrolled portion of the binding tape 25 becomes slightly slack, so
In the conventional tape rewinding mechanism, tension force acting on the binding tape 25 is generated when the binding tape 25 is crimped and cut. No force is generated to pull the cut end of the binding tape 25 back toward the tape reel 8, and the cut end of the binding tape 25 can be reliably held by the tape holding means.

Although the embodiments have been described above, the present invention is not limited thereto and includes the following.

(1) In the embodiment, the cam member 29 and the lever 2
Although the configuration is configured such that rotation transmission between the transmission gear 9 and the tape reel 8 is cut off when the binding arm 5 is raised by the cooperative action with the tape reel 7, but the present invention is not limited to this.

(2) In the embodiment, the rotation regulating protrusion 35 is provided on the fan-shaped gear 13, but this prevents the binding tape 25 from being fed out in excess of the required amount when the binding tape 25 is fed out. This is provided for the purpose of preventing this, and the present invention can be accomplished even without this.

(Effects of the Invention) As explained above, in the present invention, the binding tape is fed out immediately after the binding tape wound around the object to be bound is crimped and cut, so that the force in the unwinding direction is applied to the binding tape. There is no need to apply pressure, and you can secure enough grip for the cut end of the binding tape.
The cut end of the binding tape can be reliably held by the tape holding device.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of the main parts of the tape rewinding mechanism of the binding device according to the present invention, and FIG. 2 is an explanatory diagram of its operation.
It is. 5... Binding arm, 8... Tape reel, 9... Transmission gear, 10... Clutch, 13... Sector gear (feeding out means), 14... Two-stage gear, 17... Engagement plate (feeding out means), 21...Stopper member.

Claims (1)

[Scope of Claims] 1. Guide the binding tape mounted on the tape reel to a tape holding device via a binding arm, and make the cut end of the binding tape sandwiched by the tape holding device,
An object to be bound is brought into contact with a stretched portion of the binding tape between the binding arm and the tape holding device, and the binding tape is wound around the object while pulling out the binding tape, and the binding arm is tilted. rotating the tape reel in its unwinding direction in relation to the motion;
At the same time as the object to be bound is tightened, the ends of the binding tape wound around the object to be bound are crimped and cut at a crimping position where the binding arm and the tape holding device abut each other to form a tight bundle. A tape rewinding mechanism of a binding device, characterized in that the tape rewinding mechanism of a binding device is provided with a feeding means that feeds out the binding tape in conjunction with the binding arm when the binding arm reaches a crimping position. . 2. The feeding means engages with a sector gear that is pivotally supported by the binding arm and can freely mesh with the gear that rotates the tape reel, and a pin that is pivotally supported by the binding arm and provided on the sector gear, and the binding arm is tilted to the maximum. 2. A tape rewinding mechanism for a binding device according to claim 1, comprising: an engagement plate that is sometimes released from engagement.