JPS5813403B2 - One-cycle binding machine - Google Patents

Description

Detailed Description of the Invention The present invention uses pressurized air as a power source to supply flexible and slightly elastic strings around objects to be tied through a string guide member, After the object to be tied is bound by a string gripping mechanism that grips the tip of the string, a primary tightening mechanism that incorporates a roller driven by an air motor, and a secondary tightening mechanism that installs the string gripping mechanism on a piston rod and incorporates a piston cylinder mechanism, The present invention relates to a one-cycle device that guarantees a one-cycle tying operation in a tying machine configured to cut a lace while leaving a knot in the lace.

The present applicant has already formed a base body and a central hole for guiding the string around the object to be tied and for storing the object to be tied in the central region when the object is opened and closed in cooperation with each other, and the string introduction hole and the string. A guide means arranged so as to form a knot with the feeding hole and connected by a guide groove, and a string being fed into the guide groove, and during the primary tightening operation, the string is rewound and wrapped around the object to be bound. , is operated by the feeding/primary tightening means for forming a knot and the free end of the string to hold the free end of the string during the primary/secondary tightening operation and to apply the primary tightening to the feeding/primary tightening means. supply the signal,
a string gripping means for supplying a secondary tightening signal to the secondary tightening means; a secondary tightening means for moving the string gripping means away from the string feeding hole to perform the secondary tightening operation; and completion of the secondary tightening operation. a cutting means for cutting off a portion of the string other than that used for binding the objects to be bound, the guide means, the feeding/primary tightening means, the string gripping means, the secondary tightening means;
We have proposed a binding machine comprising means for driving and controlling the cutting means while the guide means is closed.

This tying machine can first switch the trigger valve and start the tying operation using the trigger lever, but the trigger lever must continue to be pulled until one cycle of the tying operation is completed, resulting in fatigue and unstable operation. You can't avoid it.

Furthermore, there is an inconvenience that the binding time becomes longer.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a one-cycle device for a tying machine that can complete one cycle of tying work by pulling the trigger lever once.

In order to achieve this object, the present invention presses the trigger valve stem of the trigger valve with a trigger lever disposed on the body, and in response to a control signal from the trigger valve, the cord guide member disposed around the object to be bound is pressed. The string is supplied so as to run along the circumference of the object to form a knot, and then the free end of the string is tightened by a string gripping mechanism provided at the tip of the reciprocating piston rond of the cylinder. In a tying machine that grips the string, tightens the string, and then cuts it, the trigger valve stem has an operating end small diameter section and an operating end large diameter section formed on the distal end side, a shoulder section between these, and a body. A stopper, which is rotatably supported by and has a hole into which the large diameter part of the operating end is inserted, is elastically biased, so that when unbound, the inner wall of the hole is pressed against the side of the large diameter part of the operating end, and when tied, the stopper is pressed against the side of the large diameter part of the operating end. When the small diameter part is pressed by the trigger lever, the shoulder part engages with the stopper to prevent the trigger valve stem from protruding and continuously supplies a control signal, and the stopper generates a spring-loading force due to the movement of the piston rod during the tightening stroke. The main feature is that the shoulder of the trigger valve stem is moved against the direction of the stopper to release the engagement between the shoulder of the trigger valve stem and the hole of the stopper.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8.

FIG. 1 shows a binding machine 2 incorporating a one-cycle device 1 of the present invention.

This binding machine 2 has a body 3 that is constructed approximately in the shape of a pistol.

A string guide member 4 is disposed at the tip of the body 3 (the left end in FIG. 1), and the string guide member 4 consists of a movable guide 5 and a fixed guide 6. When closed, it becomes a ring.

At the lower position of this fixed guide 6, the string is fed into the string guide member 4 or unwound from the string guide member 4.
A primary tightening roller mechanism 7 is provided.

This roller mechanism 7 is driven forward and backward by an air motor 8a.

A cutter drive cylinder 8 that is driven by pressurized air and drives a cutter that cuts the cord is arranged above this feeding primary tightening roller mechanism 7, and the cutter drive cylinder 8 is controlled at a position above this cutter drive cylinder 8. A cutter valve 9 is provided.

On the other hand, a secondary tightening cylinder 11 as a tightening cylinder is incorporated in the upper end portion and right side portion of the body 3.

A trigger valve 14 operated by a trigger lever 13 is incorporated at a position below this secondary tightening cylinder 11 and above a grip portion 12 forming a part of the body 3.

The trigger valve 14 communicates via an air passage 15 with an air plug 16 connected to an air source outside the body 3.

The secondary tightening cylinder 11 has a piston rod 17, and a string gripping mechanism 18 is disposed at the tip of the piston rod 11 (the left end in FIG. 1), and a slide block is provided in the string gripping mechanism groove 18. 19 is incorporated.

Further, a trigger valve release lever 20 having an L-shaped side surface is rotatably supported by a shaft 23 in the vicinity of the secondary tightening cylinder 11 .

A stopper 21 is rotatably supported by a shaft 24 on the grip portion 12 side in engagement with the Q trigger valve release lever 20.

One end 20a of the trigger valve release lever 20 protrudes further upwards than the upper edge 3a of the body 3 and is on the reciprocating path of the slide block 19, and is moved clockwise in FIGS. 1 and 3 by this slide block 19. Rotation operation is performed.

The other end 20b of the trigger valve release lever 20 is a stopper 2.
1 is in contact with the upper end engaging portion 22 of No. 1 .

As shown in FIG. 3, the stopper 21 has a valve stem holding portion 25 having a substantially U-shaped front view, and has a hole 26 at approximately the center of the valve stem holding portion 25.
6 is supported by the shaft 24 above.

Outer end of valve stem holding part 25 (left end side in Figure 3)
A compression spring 27 is attached to spring 27 to bias the stopper 21 to the right in FIG.

An auxiliary lever 28 is provided to protrude rearward from the right end side of the valve stem holding portion 25.

The trigger valve 14 can also be released by pushing the auxiliary lever 28 against the compression spring 27.

FIG. 2 shows a pneumatic control circuit for controlling the binding machine.

The elements constituting this air pressure control circuit are the trigger valve 14
, air motor forward/reverse switching valve 29, air motor 8a, cutter valve 9, timer operation valve 32, timer 33, secondary tightening cylinder 11, air bleed valve 35, and cutter drive cylinder 8.

One cycle of binding work by the binding machine 2 is performed in the following order.

That is, in the state shown in FIG. 4 and FIGS. 6a and 6b,
The piston rod 17 has advanced as much as possible to the left (that is, toward the tip end), and the inner wall 26a of the hole 26 of the stopper 21 is pressed against the side of the large diameter portion 34 of the operating end of the trigger valve stem 30 by the force of the compression spring 27. Being pushed.

From the state shown in FIG. 4 and FIGS. 6a and 6b, first,
When the object to be bound is inserted between the movable guide 5 and the fixed guide 6 and the trigger lever 13 is pulled, the movable guide 5
is closed with respect to the fixed guide 6 to form a circular ring.

Next, as shown in FIG. 5 and FIGS. Ga and B, when the trigger lever 13 is further pulled, the trigger valve stem 3
The operating end small diameter portion 36 of 0 is pressed to the right, and the trigger valve 14 is switched.

By switching the trigger valve 14, a signal is issued to control each step of the bundling operation in one cycle.

At the same time, the inner wall 26a of the hole 26 is pressed against the side of the small diameter portion 36 of the operating end by the compression spring 27, and the small diameter portion 36 of the operating end
The shoulder portion 31 between the trigger valve stem 6 and the operating end large diameter portion 34 comes into contact with the back surface of the valve stem holding portion 25, and the trigger valve stem 30 is self-held in this state and continues to emit a control signal.

The trigger valve 14 is switched, and the air motor 8a rotates in a direction to feed the string into the string guide member 4.

The free end of the string exiting the string guide member 4 is gripped by a string gripping mechanism 18.

At this time, the air motor forward/reverse switching valve 29 is switched by the action of the free end of the string, and the air motor 8a is reversed, so that the primary tightening work of the feed/primary tightening roller mechanism 7 is performed by this reverse operation. The timer operation valve 32 is switched, the timer 33 starts operating, and after a certain period of time, the secondary tightening cylinder 11 starts operating, and the piston rod 17 retreats to the right in FIG.

During the retraction of this piston rod 17, Katsutabarupu 9
As a result, the cutter drive cylinder 8 operates to cut the string on both sides of the knot.

After that, the slide block 19 provided at the tip of the piston rod 17 moves the trigger valve release lever 20 to the 8th a.
Rotate clockwise as shown.

This rotation of the trigger valve release lever 20 causes the stopper 21 to rotate clockwise as shown in FIG.
83, the trigger valve stem 30 is released from the shoulder 31 of the trigger valve stem 30, and by the force of the built-in compression spring 38, the trigger valve stem 30 projects to the left in FIG. 83 and returns to its original state.

Thereafter, while the piston rod 17 is advancing toward the distal end of the body 3 in the process of returning the secondary tightening cylinder 11 to its original state, the free end of the string that has become a chip is picked up by the string gripping mechanism 1.
Blow away from 8.

On the other hand, the trigger valve release lever 20 and the stopper 21 are operated by a compression spring 27, respectively, as shown in FIG.
It is rotated counterclockwise and returns to its original state.

The above control air circuit is just one example, and if each stroke from pulling the trigger lever 13 to retracting the piston rod 17 of the secondary tightening cylinder 11 is performed according to the sequence, the present invention can be applied. Various modifications may be adopted for the control air circuit that controls the one-cycle device 1.

If a failure occurs in any stroke during one cycle of the bundling work, the trigger valve 14 can be removed by pushing the auxiliary lever 28 to the left in FIG. 3 and rotating the stopper 21 counterclockwise. It is possible to release the held state.

As described above, according to the present invention, the trigger valve is mechanically self-retained by a single pull operation of the trigger lever, so there is no need to keep the trigger lever engaged throughout the tying operation, which reduces the fatigue of the tying worker. In addition to reducing the amount of stress, the bundling work can also be performed reliably.

Furthermore, even in the event of a bundling error, the trigger valve can be released by pressing the auxiliary lever.

[Brief explanation of the drawing]

Fig. 1 is an external side view of a tying machine incorporating the one-cycle device of the present invention, Fig. 2 is a pneumatic control circuit diagram of the tying machine shown in Fig. 1, and Fig. 3 is the mechanism of the above-mentioned one-cycle device. FIGS. 4 and 5 are sectional views showing the engagement relationship between the stopper and the trigger valve stem, and FIGS. 6 to 8 are side views illustrating the operation of the one-cycle device. Figures 6a and 6b show a state in which the trigger lever has not been pulled yet, Figures 7a and 7b show a state in which the trigger lever has been pulled, and Figures 8a and 8b show a state in which the trigger lever has been pulled.
Figure b shows the return state of the one-cycle device. 1... One cycle device, 2... Binding machine, 3...
Body, 4... String guide member, 11... Secondary tightening cylinder, 13... Trigger lever, 14... Trigger valve, 17... Piston rod, 18... String gripping mechanism, 21...・Stopper, 26...hole, 26a...
・Inner wall part, 27... Compression spring, 30... Trigger valve stem, 31... Shoulder part, 34... Operation end large diameter part,
36...Operation end small diameter part.

Claims (1)

[Claims] 1 A trigger lever disposed on the body presses the trigger valve stem of the trigger valve, and a control signal from the trigger valve causes the string to run along a string guide member arranged around the object to be tied. A string is supplied to form a knot around the string, and then the free end of the string is grabbed by a string gripping mechanism provided at the tip of a reciprocating piston rond of a tightening cylinder, and the string is tightened and then cut. In this binding machine, an operating end small diameter part and an operating end large diameter part are formed on the distal end side of the trigger valve stem, and a shoulder part is formed between these parts, and the operating end large diameter part is rotatably supported by the body. The inner wall of the hole is pressed against the side surface of the large diameter part of the operating end when unbound, and the small diameter part of the operating end is pressed by the trigger lever when tied. The shoulder engages with the stopper to prevent the trigger valve stem from protruding and continuously supplies a control signal, and the stopper is moved against the direction of the spring biasing force by the movement of the piston rod during the tightening stroke, and the trigger valve stem is moved. A one-cycle device that releases the engagement between the shoulder and the hole in the stopper.