JPH0698235B2 - Control device for feeding amount of strip - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the amount of feeding a strip, and more particularly, to a device capable of intermittently and efficiently performing the feeding of the strip when the feeding speed is higher than the feeding speed of the strip. Related to the device.

[0002]

2. Description of the Related Art When a belt loop continuously sewn by a sewing machine is fed to a cutting device for constant-size cutting, the feeding speed of the belt loop from the sewing machine and the feeding speed of the belt loop to the cutting device are synchronized. However, generally, the feeding amount to the cutting device is faster than the feeding speed from the sewing machine. Therefore, conventionally, a feeding amount control device is interposed between the sewing machine and the cutting device so that the belt loop is sent to the cutting device intermittently by this device. The sash follows the feeding of the belt loop to the cutting device.

FIG. 6 shows a conventional feeding amount control device. In this conventional device, a load of a balance weight 110, which is vertically guided by a vertical guide 100, is applied to the belt loop B sent from the sewing machine M, so that the belt loop B is provided between the sewing machine M and the cutting device C. The balance weight 11 is provided with the slack portion B1.
The limit switches LS1 and LS2 are installed at the upper position and the lower position in the range 0 of raising and lowering, respectively.

In this conventional device, when the cutting device C is stopped, the belt loop B is sent out from the sewing machine M, the slack portion B1 is lengthened, and the balance weight 110 is lowered accordingly. And the balance weight 11
When 0 kicks the lower limit switch LS2, the cutting device C
Is started, and the belt loop B is fed to the cutting device C at a speed higher than the feeding speed of the belt loop B from the sewing machine M. As a result, the slack portion B1 becomes shorter and the balance weight 110 rises. And balance weight 1
When 10 kicks the upper limit switch LS1, the cutting device C is stopped and only the delivery of the belt loop B from the sewing machine M is continued. Hereinafter, the same operation is repeated.

In such a conventional device, when the belt loop B is sent from the sewing machine M and the belt loop B is sent to the cutting device C, the belt loop B is vibrated. Therefore, the balance weight 110 tends to violently vibrate with the slack portion B1. This tendency is remarkable when the speed of the cutting device C is increased and the difference between the feeding speed of the belt loop B to the cutting device C and the feeding speed of the belt loop B from the sewing machine M is large.

However, if the balance weight 110 vibrates slightly near the limit switch LS2 for activating the cutting device C or near the limit switch LS1 for stopping the cutting device C, those limit switches LS1 , LS2 sometimes caused an inappropriate timing of signal switching. In addition, the conventional device,
In order to increase the speed of the cutting device C, it is necessary to lengthen the lifting stroke of the balance weight 110, which requires a large installation space and also makes it unattractive to enhance the commercial value. Was difficult.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and although it can be made extremely compact, the feeding timing of the belt-shaped body such as a belt loop can be appropriately maintained. Moreover, it is an object of the present invention to provide a belt-shaped body feeding amount control device that can appropriately cope with the speeding up of intermittent feeding of the belt-shaped body.

[0008]

According to a first aspect of the present invention, there is provided a belt-shaped body feeding amount control device, which is provided at both ends of a rocking lever whose intermediate portion is supported by a machine frame so as to be reciprocally rockable. A roller is provided around which the belt-shaped body is wound in a trapezoidal manner, and its swing lever is constantly urged in the backward direction by a spring, and when the swing lever moves backward and reaches the forward movement starting point. It is equipped with an operating lever position detecting means.

According to a second aspect of the present invention, there is provided a belt-shaped body feeding amount control device, wherein the lever position detecting means is used when the swing lever reaches the forward movement starting point and when the swing lever is released from the forward movement starting point. It uses a limit switch that switches to different states with and. According to a third aspect of the present invention, there is provided a belt-shaped body feeding amount control device, wherein a sewing machine for continuously sewing the belt-shaped body and a belt-shaped body for cutting and separating the belt-shaped body sewn by the sewing machine into strips having a predetermined length. The limit switch is arranged between the cutting device and the cutting device, and the limit switch is electrically connected to a driving source of the band cutting device.

[0010]

According to the first aspect of the invention, when the belt-like body hung on the rollers at both ends of the swing lever is fed out,
The rocking lever is pulled by the belt-shaped body and moves forward against the force of the spring. Further, when the band-shaped body is fed, the swing lever is moved back by the force of the spring in accordance with the fed amount.
Then, when the swing lever returns to the forward movement start point, the lever position detection means detects that the swing lever has reached the forward movement start point. In this case, according to the second aspect of the present invention, when the swing lever reaches the forward movement starting point, the limit switch detects that and enters the ON state, for example. For example, it will be turned off.

In the third aspect of the present invention, when the swing lever moves back and reaches the forward movement starting point, the limit switch is switched to, for example, the on state, the cutting device is activated, and the band-shaped body is fed out. The swing lever moves forward. With the forward movement of the swing lever, the limit switch is switched to, for example, the cut state, the cutting device stops, and only the feeding of the belt-shaped body from the sewing machine is performed. Move back by force. Hereinafter, the same operation is repeated.

[0012]

1 and 2 are a front view and a partially cutaway side view, respectively, of an apparatus for controlling the feeding amount of a belt according to an embodiment of the present invention. A shaft body 2 is erected on the machine frame 1, and the shaft body 2
The central portion of the swing lever 4 is fixed to the sleeve 3 that is rotatably fitted to. The set screw 5 screwed into the shaft body 2 prevents the sleeve 3 and the rocking lever shaft body 2 from falling off. A coil spring 6 is fitted to the shaft body 2, one end 7 of the coil spring 6 is hooked on the machine frame 1 side, and the other end 8 of the coil spring 6 is hooked on the sleeve 3. ing. Then, as indicated by an arrow A in FIG. 1, the swing lever 4 is constantly urged clockwise by the force of the coil spring 6. Here, the clockwise direction A in FIG. 1 is the returning direction of the swing lever 4, and the counterclockwise direction is the forward direction of the swing lever 4. Reference numeral 9 denotes a circular back plate fixed to the machine frame 1 side, and a stopper 10 protruding from the back plate 9 restricts rotation of the swing lever 4 in the backward movement direction.

A feeding side roller 13 and a feeding side roller 14 are attached to one end and the other end of the rocking lever 4 so as to freely rotate. A limit switch 11 is fixed to the back plate 9 via a mounting base 12. The limit switch 11 has a function of keeping the ON state when the actuator 11a is pushed downward as shown in FIG. 1 and the OFF state when returning to the upper side. Then, as shown in FIG. 1, when the swing lever 4 is tilted and is extremely close to the stopper 10, the actuator 11a of the limit switch 11 is pressed downward by the support shaft 15 supporting the feeding side roller 13. It is like this.

FIG. 3 shows an example in which the feeding amount control device having the above construction is installed between the sewing machine M and the cutting device C whose start / stop is controlled by the limit switch 11 described above. As shown in the figure, the belt-shaped body sewn by the sewing machine M, for example, the belt loop B, is wound around the feeding side roller 14 and the feeding side roller 13 of the feeding amount control device in a crossing manner. The belt loop B derived from 13 is guided to the cutter 20 through the guide rollers 16 and 17 of the cutting device C and between the feed roller 18 and the pressing roller 19. 21 is a guide. Cutting device C
Loop B to the cutter 20 by the feed roller 18
Of the belt loop B from the sewing machine M is set to be extremely fast. Accordingly, as shown in FIG. 3, when the swinging lever 4 is tilted and is wound around the feeding side roller 14 and the feeding side roller 13 in a trapezoidal manner, when the cutting device C is activated, the belt loop B is fed. The portion led out from the sending roller 14 is shown in FIG.
Is pulled to the left side of the
It is revived against the power of.

FIG. 4 shows a state in which the swing lever 4 has returned to reach the forward movement starting point. In this way, the swing lever 4
When reaches the forward movement starting point, the actuator 11a of the limit switch 11 is pressed by the support shaft 15 at that moment, the limit switch 11 is turned on, and the cutting device C is activated. The switch 10 is useful for preventing the swing lever 4 from rotating more than necessary beyond the forward movement starting point due to the inertia of the backward movement. When the cutting device C is activated, the belt loop B is pulled out by the feeding action of the feed roller 18 of the cutting device C and is fed out. Since the feeding speed at this time is faster than the feeding speed of the belt loop B from the sewing machine M, the feeding side roller 13 is pulled by the belt loop B as shown by an arrow X in FIG. 5, and the swing lever 4 moves forward. . When the swing lever 4 moves forward in this manner, the support shaft 15 separates from the actuator 11a of the limit switch 11, the actuator 11a returns upward, and the limit switch 11 moves.
Turns off, the cutting device C stops, and the belt loop B
The feeding of is also stopped. On the other hand, since the belt loop B is continuously fed from the sewing machine M, after the cutting device C is stopped, the belt loop B is fed from the sewing machine M as indicated by an arrow Y in FIG. Accordingly, the swing lever 4 is moved back by the force of the coil spring 6. After that, the above-described operation is repeated, and the belt loop B is continuously fed from the sewing machine M, while the belt loop B is intermittently supplied to the cutting device C.
Is paid out.

In this embodiment, the limit switch 11 is switched to a different state when the swing lever 4 reaches the forward movement start point and when the swing lever 4 is released from the swing start point.
The feeding amount control device using is explained. The limit switch 11 is an example of lever position detection means that operates when the swing lever 4 moves back and reaches the forward movement start point.
Instead of the limit switch 11, a light emitting / receiving element or the like may constitute the lever position detecting means. Further, the device of the present invention is
It is also possible to use a belt-shaped body other than the belt loop B, for example, a paper tape or a synthetic resin tape.

[0017]

According to the present invention, the adjustment of the length of the strip by swinging the swing lever plays the same role as the adjustment of the length of the slack portion of the strip by the conventional device. It will be compact, and it will help to improve the product value by increasing the appearance. Further, since the position of the swing lever is detected to adjust the feeding timing of the strip, the feeding timing of the strip is appropriately maintained and the intermittent feeding of the strip is speeded up. Will be possible. Further, according to the invention of claim 3, there is an effect that the intermittent feeding of the band-shaped body to the cutting device can be performed at high speed with one limit switch.

[Brief description of drawings]

FIG. 1 is a schematic front view of a belt-shaped body feeding amount control device according to an embodiment of the present invention.

FIG. 2 is a schematic side view in which a part of the device is cut away.

FIG. 3 is a schematic side view of an example in which the device is installed between a sewing machine and a cutting device.

FIG. 4 is an operation explanatory view of the same device.

FIG. 5 is an operation explanatory view of the same device.

FIG. 6 is a schematic side view of a conventional device.

[Explanation of symbols]

 1 Machine frame 2 Shaft body 4 Swing lever 6 Coil spring (spring) 11 Limit switch (lever position detection means) 13, 14 Roller B Belt loop (belt) M Sewing machine C Cutting device

Claims (3)

[Claims] 1. A roller around which a belt-shaped body is wound in a trapezoidal manner is provided at both ends of a swing lever whose middle portion is supported by a machine frame so as to be capable of reciprocating swing, and the swing lever is provided. Is always biased in the backward direction by a spring, and is provided with a lever position detecting means that operates when the swing lever moves backward and reaches the forward movement starting point. Feeding amount control device. 2. The lever position detection means is a limit switch that switches to a different state when the swing lever reaches the forward movement starting point and when the swing lever is released from the forward movement starting point. Of feeding amount of the belt-shaped body. 3. A sewing machine for continuously sewing a band-shaped body and a band-shaped body cutting device for cutting and separating the band-shaped body sewn by the sewing machine into strips of a predetermined length, 3. The band feed amount control device according to claim 2, wherein the limit switch is electrically connected to a drive source of the band cutting device.