JPH033447Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a tying machine with a rotating strapping arm.

(Prior art) Conventionally, as a device for giving a margin to the string for knot formation in a tying machine, Japanese Patent Publication No. 49-13478,
Utility Model Publication No. 54-3990, Patent Office Publication No. 53-219, Collection of Well-Known and Commonly Used Techniques, pages 102 and 103, and Utility Model Publication No. 53-219
No. 49258 is known.

The arm-rotating type tying machine includes an arm that rotates to wrap the string around the object to be tied, and a tying mechanism that has a beak, a string presser, etc. for forming a knot. The beginning and end of the string wrapped around an object are pulled to the beak using an insertion rod and a string lifting rod, and the margin for such pulling of the string depends on the elasticity of the string and the object to be tied. It was worked out by biting the string into the hole. Therefore, if the object to be tied is relatively hard, it is difficult to create enough room for the string to form a knot, resulting in excessive force being applied to the beak and related members of the tying mechanism, or the string breaking. It was hot.

In order to overcome this problem, the conventional technology uses a cam a rotated by a main shaft to move the string presser d in the direction of arrow e through rods b and c, as shown in Fig. 3, or as shown in Fig. 4. As shown in FIG. 5, there is one in which the string presser button d is supported by an elastic material f, and another in which the object to be tied is supported by an elastic material such as rubber g as shown in FIG.

(Problems to be Solved by the Invention) In the above-mentioned conventional technology, the mechanism is complicated because the cam and the rod provide a margin for the string, and the mechanism that elastically supports the cord presser button does not provide enough margin for the string. Furthermore, there was a problem in that devices that support objects to be bound using elastic materials such as rubber do not play their role in the case of heavy objects to be bound.

Therefore, an object of the present invention is to provide an arm-rotating tying machine that has a simple structure and can reliably provide enough string for knot formation, no matter what kind of objects are to be tied.

(Means for Solving the Problems) The configuration that characterizes the tying machine according to the present invention is that, during the first rotation of the arm 2, the trajectory of the string stretched between the tip of the arm and the string presser 4 of the tying mechanism is It includes an operating rod 10 that protrudes from a surface and can move forward and backward, and a device that operates the operating rod 10 by a cam that rotates in synchronization with a main cam that operates the arm 2. It is designed to be temporarily hung with a string.

(Effect of the above means) When tying, the operating rod 10 protrudes during the first rotation of the strapping arm, and the string is also hung on its tip 14, and during the next rotation, the operating rod 10 retracts, so that the 2 After the first time, the string was not hung on the tip,
This is done in the same manner as before. When the string is initially hung on the tip of the operating rod 10, the string becomes slack, and the slack of the string becomes sufficient to properly form a knot using the beak.

(Example) Next, an example of the present invention will be described with reference to the drawings. Figure 1 shows a binding mechanism 1 and a strapping arm 2, which constitute the main parts of the binding machine, and the arm 2 rotates around objects to be bound placed at predetermined positions on the table of the binding machine. and wrap the string S around it.
A string is pulled out from the tip 2a. Binding mechanism 1
These are an insertion rod 3a and a string lifting rod 3b, which are used to gather the string when forming a knot, that is, to gather the end portion of the string around the beak and the beginning portion of the string, a string presser 4, which presses the end of the string, and a knot. It includes a beak 5 for making strings, a cutter 6 for cutting strings, etc. Binding mechanism 1
The respective members and the strapping arm 2 are operated by a main cam 8 provided on the main shaft 7 of the binding machine, and the arm 2 and the binding mechanism 1 are operated at predetermined timings.

As shown in the figure, the beak 5 consists of an upper beak and a lower beak. The upper beak is fixed to the rotating shaft of the beak, and the lower beak is pivotally fixed by a pin. The beak roller at the rear end engages and swings the lower beak to open and close. When the beak 5 is in a predetermined position, the insertion rod 3a and the string lifting rod 3b
By the operation of the , the end and start of winding of the string are brought closer to the beak, the main body of the beak is swung, the string is hooked to the chin of the beak, and the beak is rotated. At this time, the beak roller engages with the cam and moves, so the lower beak swings and the beak gradually opens.During this time, it rotates once with the string in its mouth, and when it returns to its original position, the beak closes. The beak body then swings back to its original position,
The loop of string around the beak comes undone to form a knot.

Therefore, to form a knot, the string is hung around the chin of the beak 5, so the string wrapped around the object to be tied must have some slack or room.If the object to be tied is hard, there is no room for the string. , it had the drawbacks mentioned above.

The feature of the present invention is that it is provided with an actuating rod or lever 10 that can move forward and backward and protrude from the passageway surface of the string stretched between the tip 2a of the arm 2 and the string presser 4 of the binding mechanism. The rod 10 preferably consists of a lever pivoted by a pin 11 as shown, with a roller 12 at one end (lower end in the figure) of the lever 10 engaging a cam 13 provided on the main cam 8, and the other end of the lever 10 engaging with a cam 13 provided on the main cam 8. (Tip) 14 is movable forward and backward so that it can protrude onto the raceway surface. The shape and position of the cam 13 are set so that the tip 14 of the lever 10 protrudes at the first rotation of the arm 2, that is, the first time the string is wound around the object to be bound multiple times. 1 is a groove in which the upper part of the lever 10 is received when it retreats, and 16 is a spring that attracts the lower part of the lever.

In the illustrated embodiment, the protruding operating rod is composed of a pivot lever whose upper end moves forward and backward in relation to the cam 13 on the main cam, but it is clear that this operating rod may have other configurations, such as Through a limit switch operated by a cam rotating in synchronization with the main cam 8, a solenoid or a cylinder device is used to move the arm 2 vertically to the track surface. It may also operate in a protruding manner.

In the tying machine of the present invention, during operation, the tying arm 2
When the lever 10 rotates for the first time, the roller 12 at the lower end of the lever 10 disengages from the cam 13 of the main cam, and the tip 14 of the lever 10 protrudes, causing the lever 10 to move together with the object A as shown in FIG. A string is also hung on the tip 14 of the lever 10, so that when the arm 2 next rotates, the tip 14 of the lever 10 is connected to the roller 12 of the lever and the cam 1.
It is retracted by the engagement of 3, and therefore, the second and subsequent windings of the string are done in the same manner as in the conventional case. Note that 17 in FIG. 2 is a table.

Therefore, in the first winding, the lever tip 1
The slack in the string due to the hanging on the string makes room for the string, and the knot can be properly formed by the beak due to the slack in the string. Further, the position of the tip 14 of the lever 10 is determined so that there is enough room for the string.

Therefore, according to the present invention, with a simple mechanism,
Even if the object to be tied is heavy, there is enough room for the string to form the knot, so no excessive force is applied to the tying mechanism when forming the knot, and it also prevents the string from breaking. be done. This is particularly useful when the hard object to be tied is small or when the number of strings wrapped around it is small, since the elasticity of the string will cause less elongation.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts of a binding machine according to an example of the present invention, Fig. 2 is a side view showing a state in which a string is hung around objects to be bound in the binding machine of the present invention, and Fig. 3 is a conventional bundling machine. FIG. 4 is a side view of a supporting portion of a conventional string presser button, and FIG. 5 is a perspective view showing another example of a conventional tying machine. In the figure, 1... Binding mechanism, 2... Arm, 2a...
...Tip of arm, 4...String holder, 5...Beak,
8... Main cam, 10... Operating rod that can protrude,
12... One end of the operating rod, 13... Cam, 14...
The other end of the operating rod.

Claims (1)

[Claims for Utility Model Registration] (1) An arm that rotates to wrap the string around the object to be tied, a beak for forming a knot, a string presser, and a device that connects the beginning and end of the string as described above. In the tying machine including a tying mechanism having a string lifting rod and an insertion rod for pulling the string toward the beak, the tying device further includes a string tensioned between the tip of the arm and the string presser during the first rotation of the arm. 1. A binding machine comprising: an operating rod that is movable forward and backward protruding from a passing track surface; and a device that operates the operating rod using a cam that rotates in synchronization with a main cam that operates the arm. (2) Utility Model Registration In the binding machine according to claim 1, one end of the operating rod engages with a cam provided on the main cam of the binding machine, and the other end is a pivot that moves forward and backward on the track surface. A binding machine consisting of a stop lever.