JPH0443450Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is designed to relax the tension of the tape pulled out from the tape reel in conjunction with the raising and lowering of the binding arm, and to wind the tape around a soft object. This invention relates to a tape loosening device for a binding machine.

(Prior Art) A conventional tying machine is shown in FIGS. 3 and 6 and explained. A tying arm 3 is pivoted on a support shaft 4 on a bracket provided on a base 1 so as to be movable up and down. . Further, a tape reel 5 is rotatably provided on the bracket on a shaft 5a. A sector gear 6 is fixed to the shaft support of the binding arm 3, and the rotation of the sector gear 6 caused by the raising and lowering of the binding arm 3 is transmitted to the tape reel 5 through a gear 7 that meshes with the sector gear 6. It's summery. That is, when the binding arm 3 is stood up clockwise (standing up direction), the tape reel 5 rotates counterclockwise to pull out the tape, and when the binding arm 3 falls counterclockwise (falling direction), the tape reel 5 rotates counterclockwise to pull out the tape. A ratchet mechanism (not shown) prevents the tape reel 5 from rotating, thereby preventing the tape from loosening during binding.

As shown in FIG. 6, this tape reel 5 is provided with a friction plate 5b and is pushed in the axial direction by a reel pressing spring 5c, so that the tape reel 5 resists rotation restriction by the ratchet mechanism. It is designed to be able to rotate so that the tape does not break due to the tensile force applied to the tape during binding.

The pulled out tape 8 is then moved to the guide roller 9
a, 9b, 9c to guide the tip 3 of the binding arm 3.
a and the tape pressure receiving and holding mechanism 15 and is pulled out in a stretched state.

When bundling objects using this binding machine, the operator first holds the objects S and wraps the tape 8 around the objects A by pushing the tape 8 from the direction of the arrow A. The adhesive sides of the tape 8 are pasted together and cut by overturning the tape.

(Problems to be Solved by the Invention) In the above-mentioned conventional binding machine, when binding objects to be bound, the operator first presses the objects to be bound against the tape. In this first binding operation, the rotation of the tape reel 5 is regulated by a ratchet mechanism (not shown), so the tape 8
However, if the tape is strongly pressed by the object to be bound, the tape reel rotates against the frictional force of the friction plate and the tape is pulled out.
Next, the tape is wound around the object to be bound while the binding arm is turned over and the tape stretched between the tip of the binding arm and the tape pressure receiving and holding mechanism is loosened. The tape is wound around the objects to be bound with an appropriate tightening force and bound, depending on the total length of the tape being pulled out due to the pushing of the objects to be bound in the initial stage of binding and the length of the tape loosening due to the overturning of the binding arm.

However, depending on the type of material to be bound, for example, when binding soft materials such as spinach, the following problems arise.

First, at the initial stage of binding, when the tape is pushed into the object to be bound and an appropriate amount of tape is pulled out, if the object to be bound is soft, the object to be bound may be damaged by the pushing force.
In addition, if the pushing force is weakened in order to prevent damage to the objects to be bound at the initial stage of binding, the length of tape required for binding will be shortened, and the binding tightening force will be strong, which will also damage the soft objects that have been bound. The problem is that it hurts.

The present invention provides a tape loosening device for a binding machine that can bind even such soft objects to be bound without damaging them.

(Means for Solving the Problem) A means according to the present invention for solving the above problem is a binding machine that performs binding by raising and lowering a binding arm pivoted on a base, in which a bracket is attached to the base. A guide roller support frame is provided on the bracket so as to be able to swing, a guide roller is provided at the tip of the guide roller support frame, and a roller bearing for driving the guide support frame is provided approximately in the middle of the guide roller support frame. A lever that contacts the support frame driving roller bearing is rotatably provided, and when the binding arm is overturned, the lever contacts the guide support frame driving roller bearing and rotates, causing the binding arm to rotate. The rotation of the lever is regulated so that when the lever is raised, the lever comes into contact with the roller bearing for driving the guide roller support frame and swings the guide roller support frame.

(Function) Since the present invention is configured in this way, when the binding arm stands up from the position where it has fallen, the tip of the lever comes into contact with the support frame driving roller bearing and pushes the support frame driving roller bearing. The support frame is swung. This causes the tape to be pulled out. When the lever passes through the supporting frame driving roller bearing and its tip comes off, the supporting frame swings in the opposite direction and the pulled out tape is guided to the guide roller in a relaxed state.

Next, when the objects to be bound are bound, when the tape pulled out from the tip of the binding arm is pushed by the objects to be bound, since the tape is already in a loosened state, the tape is pushed with a light force. Therefore, even if the objects to be bound are soft, they will not be damaged. Next, when the binding arm is pushed down, the tip of the lever comes into contact with the support frame drive roller bearing, but the lever rotates and escapes, allowing the binding arm to be pushed down.
The tape is then wound around the object while being loosened. The binding tightening force at this time is the total length of the tape pulled out by the swinging of the support frame and the length of the tape pulled out from the tip of the binding arm, so it is suitable for soft objects. It provides a tightening force that will not damage soft objects to be bound.

Also, when binding hard items such as green onions, rotate the lever so that its tip does not come into contact with the roller bearing for driving the support frame, thereby preventing the support frame from swinging. Eliminate the extra tape drawer and use it as a normal binding machine.

(Example) An example of the present invention will be described below. 1st
In the figures and FIG. 2, a binding arm 3 is pivotally supported on a support shaft 4 on a bracket 2 provided on a base 1 so as to be movable up and down. Further, a tape reel 5 is provided on the bracket 2 so as to be rotatable about a shaft 5a. A fan gear 6 is fixed to the shaft support of the binding arm 3, and the binding arm 3 is connected to the binding arm 3 via a gear 7 that meshes with the sector gear 6.
Rotation of the sector gear 6 due to the up and down movement of the tape reel 5 is transmitted to the tape reel 5. That is, when the binding arm 3 is stood up clockwise (standing up direction), the tape reel 5 rotates counterclockwise to pull out the tape, and when the binding arm 3 falls counterclockwise (falling direction), the tape reel 5 rotates counterclockwise to pull out the tape. A ratchet mechanism (not shown) prevents the tape reel 5 from rotating, thereby preventing the tape from loosening during binding.

As shown in FIG. 2, this tape reel 5 is provided with a friction plate 5b and is pushed in the axial direction by a reel pressing spring 5c, so that the tape reel 5 resists rotation restriction by the ratchet mechanism. It is designed to be able to rotate so that the tape does not break due to the tensile force applied to the tape during binding.

The pulled out tape 8 is guided by a guide roller 33a, which will be explained later, and guide rollers 9b and 9c provided on the binding arm 3, and is stretched between the tip of the binding arm 3 and the tape pressure holding mechanism 15. It has been brought out in good condition.

Another bracket 30 is erected on one side of the bracket 2 on the base 1. A support frame 32 is provided on this bracket 30 so as to be swingable by a pin 31. This support frame 32 is formed with a projection 38 projecting downward, and a support frame driving roller bearing 39 is provided at the tip thereof, and a guide roller 33 is provided at the tip of the support frame 32. A tension spring 41 is provided on the pin 42 provided on the bracket 30 and the shaft of the roller bearing 39 for driving the support frame, and the tension spring 41 applies its elasticity so as to rotate the support frame 32 downward (clockwise in FIG. 1). power is given. Further, a stopper 40 is provided on the bracket 30 so as to restrict the downward rotation of the support frame 32 at a predetermined position. On the other hand, a lever 34 is rotatably mounted on a bearing 35 on the binding arm 3, and a stopper 36 equipped with a spring 37 is provided on the binding arm 3 so as to come into contact with the lower end of the lever 34. This lever 34 and support frame 3
The positional relationship with the support frame driving roller bearing 39 provided in 2 is that when the lever 34 reaches the position 34b during the raising and lowering operation of the binding arm 3, the lever 34
The tip of the support frame is in a position where it comes into contact with a roller bearing 39 for driving the support frame.

Next, the tape crimping/cutting mechanism 10 provided at the tip of the binding arm 3 and the tape pressure holding mechanism 15 provided on the base 1 will be described with reference to FIGS. 4 and 5. The tape crimping and cutting mechanism 10 includes a tape crimping rod 1
1. Gap filler rod 1 to assist in crimping the tape
0a, a tape press roller 12, a tape press auxiliary roller 13, and a tape cutter 14. Next, in the tape pressure holding mechanism 15, a holding roller swinging plate 18 is supported by a shaft 19 on a bracket 18, and a tape holding roller 17 is supported at the upper end of this holding roller swinging plate 18 by a shaft 17a. . The pressure receiving base 16 is fixed to a bracket 18a, and a tape push-up rod 16a is installed inside the pressure receiving base 16.
is provided. 15a is the tape holding roller 1
7 is a ratchet for regulating rotation in the counterclockwise direction in the drawing.

In Fig. 4, the binding arm 3 is overturned and its tip 3
a descends and the tape 8 wound around the object to be bound S is pressed between the tape pressing rod 11 and the pressure receiving table 16 while increasing the winding force by the gap closing rod 10a. Then, when the binding arm 3 is further pushed down, the tape crimping rod 11 is pressed down as shown in FIG.
While being compressed against the elastic force of the spring, the tip 3a descends, and the cutter 14 also descends, and the tape presser roller 12 pushes the tape holding roller 17, thereby swinging the holding roller swing plate 18, and the foot part The tape push-up rod 16a is pushed up at 18b. The tape 8 is then cut by the cutter 14 while being pushed up by the tape push-up rod 16a. The cut end 8a of the cut tape is held between the tape pressing roller 12 and the tape holding roller 17. Then, when the binding arm 3 is moved in the direction of standing up, the tape pressing roller 12 rises, and the holding roller swing plate 18 is moved by the spring 1.
At 9a, it swings toward the tape holding surface 20 side. Then, the tape cut end 8a is held between the tape holding roller 17 by the tape holding auxiliary roller 13 while receiving the elastic force of the spring 13b, and finally the tape holding roller 17 and the tape holding surface 2
0. Note 2
1 is a mounting table, and 22 is a spring.

The operation of this embodiment configured in this way will be described next. In FIG. 1, when the binding arm 3 falls down and stands up from the position 3', the lever 34
moves from position 34a drawing a trajectory 43.
When the lever 34 reaches the position 34b, its tip contacts the support frame driving roller bearing 39, and the rotation of the lever 34 is restricted by the elastic force of the spring 37 of the stopper 36, and the support frame driving roller bearing 39 is pushed, and the support frame 32 is swung to the position 32a against the elastic force of the spring 41.
As a result, the tape 8 is pulled out from the tape set on the tape reel 5 by the guide roller 33a. Next, when the lever 34 passes through the supporting frame driving roller bearing 39 and its tip comes off, the supporting frame 32 swings in the opposite direction due to the spring 41, and the swinging is stopped by the stopper 40. As a result, the tape 8 pulled out by the guide roller 33a is guided to the guide rollers 33, 9b, and 9c in a loosened state.

Next, when the objects to be bound are bound, it is done as follows. In other words, the tape 8 whose cut end is held by the tape pressure receiving and holding mechanism 15 and pulled out over the tip of the binding arm 3 is already in a loosened state, so when the tape 8 is pressed by an object to be bound, the tape 8 is Pressed with light force. Therefore, even if the objects to be bound are soft, they will not be damaged. Next, when the binding arm 3 is pushed down, the tip of the lever 34 comes into contact with the support frame driving roller bearing 39, but the lever 34 rotates and escapes, so the binding arm 3
can be pressed down. And pressure receiving mechanism 1
5 and the tip of the binding arm 3, the tape 8 is loosened and wound around the object to be bound.
The binding tightening force at this time is determined by the length of the tape 8 pulled out by the swinging of the support frame 32 and the length of the tape 8 whose cut end is held between the tape pressure receiving and holding mechanism 15 and pulled out over the tip of the binding arm 3. Since the tape 8 is wound with a total length of , the tightening force is suitable for soft objects to be bound.

Next, when the binding arm 3 is pushed down further, its tip 3a
The tape 8, which has been lowered and wound around the object S, is crimped between the tape crimping rod 11 and the pressure receiving table 16 while increasing the winding force by the gap closing rod 10a. When the binding arm 3 is further pushed down, the tape pressing rod 11 is compressed against the elastic force of the spring, and the tip 3a is lowered, the cutter 14 is also lowered, and the tape pressing roller 1 is pressed down as shown in FIG.
2 pushes the tape holding roller 17, thereby swinging the holding roller rocking plate 18 and pushing up the tape push-up bar 16a with the foot portion 18b. and tape 8
is cut by the cutter 14 while being pushed up by the tape push-up rod 16a. The cut end 8a of the cut tape is held between the tape pressing roller 12 and the tape holding roller 17. Then, when the binding arm 3 is moved in the direction of standing up, the tape pressing roller 12 rises, and accordingly, the holding roller swing plate 18
is swung toward the tape holding surface 20 by a spring 19a. The tape cut end 8a is held between the tape holding roller 17 by the tape holding auxiliary roller 13 while receiving the elastic force of the spring 13b, and finally held between the tape holding roller 17 and the tape holding surface 20. be done. Then, when the binding arm 3 is raised, the tape 8 is pulled out, and the support frame 32 is swung by the lever 34 to further pull out extra tape to make the tape loose for the next binding.

The above explanation deals with soft objects such as spinach, but if the objects are hard and the binding force is to be strong, such as green onions and burdock root, rotate the lever 34 so that the tip of the object is supported. The support frame 32 is prevented from coming into contact with the frame driving roller bearing 39, and the swinging of the support frame 32 is restricted to prevent the tape 8 from being pulled out by the support frame 32. A strong binding force can be obtained by rotating the tape reel 5 against the frictional force of the friction plate 5b using the pressing force against the tape 8 of the objects to be bound, and pulling out the tape 8 by the required length.

(Effects of the invention) As detailed above, according to the invention, the support frame is swung through the lever by raising and lowering the tying arm, and the tape is pulled out in advance before tying. The force of pressing the tape with the binding object is reduced, so that even soft objects can be bound without damaging them, and the binding tightening force can be set to an appropriate level to enable the binding of soft objects.

Furthermore, by rotating the lever so that its tip does not come into contact with the roller bearing for driving the support frame, it is possible to use it as a normal binding machine. This makes it possible to bind both soft and hard objects by operating the lever and selecting the length of the tape to be pulled out.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention;
The figures are a front view of Fig. 1, Fig. 3 is a side view of a conventional binding machine, Fig. 4 is a partially enlarged side view of the tip of the tying arm and tape pressure holding mechanism shown in Fig. 5
This figure is a side view showing the state in which the tape is cut in FIG. 4, and FIG. 6 is a front view of FIG. 3. 1... Base, 3... Binding arm, 8... Tape, 3
0... Bracket, 32... Support frame, 33... Roller, 34... Lever.

Claims (1)

[Scope of utility model registration request] In a binding machine that performs binding by raising and lowering a binding arm pivoted on a base, a bracket is erected on the base, a guide roller support frame is swingably provided on the bracket, and the guide roller support frame is A guide roller is provided at the tip, and a roller bearing for driving the guide support frame is provided approximately in the middle thereof, and a lever that contacts the roller bearing for driving the guide support frame is rotatably provided on the binding arm, and the rotation of the lever is When the binding arm falls down, the lever contacts the guide support frame driving roller bearing and rotates, and when the binding arm is erected, the lever contacts the guide support frame driving roller bearing and supports the guide roller. A tape loosening device for a binding machine, characterized in that the rotation of the frame is regulated so as to swing the frame.