JPH08318073A - Automatic bobbin thread supply controller - Google Patents

Abstract

PURPOSE: To evade a hindrance such as thread entangling or the like when power is interrupted and to immediately execute bobbin exchange when the power is supplied again by providing a power energizing controller for interrupting energizing after the processing operation of a device in the middle of the operation is completed at the time of interrupting a power source switch. CONSTITUTION: Even when the power is unexpectedly interrupted in the middle of the operations of the respective devices of a remaining thread removing device 161, a bobbin thread winding device 162, a thread hooking device or a cutting device or a bobbin exchange device 160, the processing operations of the respective devices in the middle of the operations are completed by a power energizing controller 300. When the processing operations scheduled to be performed following the processing operations are present, the processing operations are successively completed, a bobbin exchange standby state is attained and, thereafter, the energizing to the respective devices is interrupted. Thus, a fault such as the thread entangling or the like is prevented and the bobbin exchange is immediately executed when the power is supplied again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic bobbin thread feeder.

[0002]

2. Description of the Related Art In a sewing machine for sewing using an upper thread and a lower thread, particularly for an industrial sewing machine which performs high-speed sewing work, it is necessary to frequently replace a bobbin wound with a lower thread. There is. Generally, when the bobbin thread is consumed or the remaining amount is low, the sewing machine operation is temporarily stopped, the bobbin case is removed from the hook, the bobbin residual thread is removed, and the bobbin thread is wound around the bobbin. Re-accommodates the newly wound bobbin in the bobbin case, hooks the wound bobbin thread on the bobbin case, cuts the bobbin thread derived from this bobbin case with a predetermined length, and cuts this bobbin case. A series of operations, which is mounting in the pot, is performed manually.

However, such a manual removal operation of the residual thread, a bobbin winding operation on the bobbin, a thread hooking operation, a thread cutting operation and a bobbin case replacement operation are extremely inefficient and cause a decrease in productivity. Has become. Therefore, the applicant of the present application, in Japanese Patent Application Laid-Open No. 7-68071, etc., has automatically performed the above-mentioned residual thread removing work, bobbin winding work, thread hooking work, thread cutting work and bobbin case replacement work. And proposes an automatic bobbin thread feeder.

This automatic bobbin thread supplying device is equipped with a bobbin exchanging device for gripping a bobbin case accommodating a bobbin and moving along a predetermined path, and removing residual thread of the bobbin accommodated in the bobbin case. Residual thread removing device, bobbin thread from a bobbin thread supply source is inserted from the bobbin case opening, and the bobbin is driven to rotate to wind the bobbin thread around the bobbin in the bobbin case. And a thread hooking device for hooking the lower thread drawn from the opening of the bobbin case and rotating the circumference of the bobbin case so that the lower thread wound around the bobbin is drawn from a predetermined position of the bobbin case. The bobbin case has a thread cutting device that cuts a lower thread drawn from a predetermined position while leaving a predetermined length.

First, the bobbin case in which the lower thread is consumed is taken out of the shuttle by the bobbin exchanging device and conveyed to the residual thread removing position, where the residual thread removing device removes the residual thread of the bobbin. After that, the bobbin is conveyed to the bobbin winding position, where a new bobbin thread is wound around the bobbin by the bobbin winding device, the new bobbin thread is wound around, and the bobbin thread derived from the bobbin case is wound by the bobbin threading device. The thread is hooked on the case, the bobbin thread that is pulled out from the bobbin case is cut by the thread trimming device, and the bin case that has been treated in this way is conveyed to the hook side by the bobbin exchanging device and installed in the hook. It is supposed to be done. That is,
The series of operations described above is automatically executed.

[0006]

However, in such a bobbin thread automatic feeding device, it is necessary to always energize during the operation of each device, which is ignored during the operation of each device. If this happens, there is a fear that thread entanglement or the like will occur at the start of the next operation. Since the automatic bobbin thread feeder is arranged inside the bed of the sewing machine, for example,
The operating state of each device is considered to be invisible or hard to see by the operator. Therefore, it is difficult to determine whether or not each device is operating, that is, whether or not the power can be shut down. You have to wait until the power is cut off.

When the power is turned on again after the power is cut off, it is necessary to start the bobbin thread automatic feeding device from the beginning or from a predetermined operation. It takes time to apply all of them,
If a bobbin replacement request is made during that time, there is a problem that the bobbin replacement cannot be executed immediately and the user has to wait (a loss time occurs).

Further, when the bobbin case and the bobbin in the shuttle and the waiting bobbin case and the bobbin held by the bobbin exchanging device are processed by humans during the above-mentioned power interruption, the The condition of the bobbin and the bobbin case may be changed, and if the condition of the bobbin and the bobbin case becomes uncertain in this way, after the power is turned on again, in some cases, the subsequent automatic processing operation cannot be continued as it is. There is.

Further, since it is not possible to automatically determine the presence or absence of the manual intervention, if the continuous processing is continued regardless of the presence or absence of the manual intervention, for example, if the manual intervention occurs, a large amount of time will occur after that. There is a fear that a failure will occur, and if the operator checks each time without continuing the continuous processing, for example, there is a problem that the automation rate decreases when there is no human intervention.

Therefore, according to the present invention, each device of the automatic bobbin thread feeder can be protected when the power is cut off, and troubles such as thread entanglement can be avoided in advance, and the bobbin can be immediately replaced when the power is turned on again. A first object of the present invention is to provide an automatic bobbin thread supply control device capable of reducing the loss time of the automatic bobbin thread supplying device.

In addition to the first object, the bobbin case and the bobbin in the hook during the power-off, and the waiting bobbin case and the bobbin which are held by the bobbin exchanging device after the necessary processing for bobbin exchange are performed. A second object of the present invention is to provide an automatic bobbin thread feeding control device that is less likely to involve human intervention and can improve the possibility of continuing the processing operation after the power is turned on again.

In addition to the above-mentioned first and second objects, the bobbin case in the shuttle and the bobbin case in the standby state, which is gripped by the bobbin exchanging device, has been processed for bobbin and bobbin exchange while the power is shut off. A third object of the present invention is to provide an automatic bobbin thread supply control device capable of determining the presence or absence of manual intervention on the bobbin, preventing the occurrence of problems after the power is turned on again, and improving the automation rate.

[0013]

In order to achieve the above object, an automatic bobbin thread supply control device according to a first aspect of the present invention comprises a residual thread removing device for removing a residual thread of a bobbin and a lower thread from a lower thread supply source. A bobbin winding device capable of winding a bobbin by rotating a bobbin, a thread hooking device capable of hooking a bobbin wound on a bobbin to a bobbin case, and a thread hooked to the bobbin case And a bobbin case grasping means capable of grasping or releasing the bobbin case accommodating the bobbin. The bobbin case grasping means is provided at the hook position and the processing operation of each device. In a bobbin automatic feed control device equipped with a bobbin exchanging device movable to a position, the operation of each device is constantly monitored, and the processing operation of the device in the middle of operation when the power switch is cut off is monitored. If there is a necessary processing operation before bobbin replacement that is scheduled to be performed subsequently to this processing operation, the processing operations are sequentially completed to enter the bobbin replacement standby state, and then the power supply to each device is cut off. It is characterized in that it has a power supply energization control device.

According to a second aspect of the present invention, in addition to the first aspect, the bobbin thread automatic supply control device further includes:
After setting the bobbin exchange standby state, give an operation command to the bobbin exchange device and move the bobbin case, which has undergone the processing required for bobbin exchange, to a position where it faces the shuttle and then closes the power to each device. It is characterized by that.

According to a third aspect of the present invention, there is provided a bobbin thread automatic supply control device, in addition to the above second aspect,
When the power switch was turned on again, a predetermined movement operation command was given to the bobbin exchange device, and based on the movement of the movable part of the bobbin exchange device according to this movement operation instruction, manual intervention was made before turning on the power switch again. It is characterized by including a manual intervention determination means for determining whether or not it is.

[0016]

According to the above-described automatic bobbin thread supply control device of the present invention, the residual thread removing device, the bobbin thread winding device, the yarn hooking device, the thread trimming device, or the bobbin exchanging device is operated unexpectedly during operation. Even if the power is cut off, if there is a necessary processing operation before bobbin replacement that is scheduled to be performed subsequent to this processing operation after the processing operation of each operating device is completed by the power supply energization control device. Since the processing operations are sequentially completed and the bobbin replacement standby state is followed, and the power supply to each device is cut off, the trouble such as thread entanglement is prevented, and the power supply can be arbitrarily cut off.
Moreover, the bobbin can be replaced immediately when the power is turned on again.

Further, according to the bobbin thread automatic feed control device of the second aspect, in addition to the operation of the first aspect, after the bobbin exchange standby state, an operation command is given to the bobbin exchange device. The bobbin case, which has undergone the necessary processing for replacement, is moved to the position facing the hook, and the power to each device is cut off after that, so the bobbin case inside the hook and the bobbin, and the bobbin replacement The bobbin case and the bobbin in the standby state, which have been subjected to necessary processing and are gripped by the bobbin exchanging device, are less likely to be manually intervened unless the bobbin case gripping means is forced away from the hook.

Furthermore, according to the bobbin thread automatic feed control device of claim 3, in addition to the operation of claim 2, when the power switch is turned on again, a predetermined moving operation command is given to the bobbin exchanging device. Based on the movement of the movable part of the bobbin exchanging device according to this movement operation command, the manual intervention determination means performs the bobbin case and the bobbin in the shuttle before the power switch is turned on again, and the processing required for bobbin exchange is performed. It is determined whether or not human intervention has been performed on the waiting bobbin case and the bobbin held by the exchange device.If it is determined that human intervention has been performed, for example, a check is performed by an operator and it is determined that human intervention has not occurred. When the determination is made, for example, the continuation process is continued.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, the bobbin thread automatic supplying device of the present embodiment is roughly constituted by a bobbin thread winding device 162, a residual yarn removing device 161, and a bobbin changing device 160. The changing device 160 includes a bobbin winding position C of the bobbin winding device 162, a residual yarn removing position B of the residual yarn removing device 161, a shuttle position (bobbin case attaching / detaching position) A, and a bobbin of a dummy shaft (bobbin case holding means) 6. The bobbin case 2 is moved to the case attaching / detaching position D. The bobbin thread automatic feeding device 162 is used for the sewing machine bed 10.
The bobbin exchanging device 160, which is provided in the lower portion of the la 1a, will be described below with reference to FIGS.

In FIGS. 2 to 6, reference numeral 1 is a shuttle on which the bobbin case 2 is mounted, reference numeral 1a is a shuttle shaft, and reference numeral 3 is an upright position on a main base attached to the sewing machine body. 2A and 2B respectively show a base plate as a support disposed on the base plate 3. A base end 4a of a transport shaft 4 having an axis parallel to the shuttle shaft 1a is fixed to the base plate 3, and the transport shaft 4 is The base plate 3 is cantilevered.

A transport block 12 is rotatably and slidably supported on the transport shaft 4 on the tip 4b side (opposite to the base plate) of the transport shaft 4. As shown in FIG. 2 in particular, the transport block 12 has a shape in which the outer peripheral surface of a cylinder is cut at two locations along the axial direction so that the cut surfaces face each other. To each cut surface of the transport block 12, one plate-shaped portion forming the L-shape of the transport plates 10, 10 bent into an L-shape is fixed, respectively. Further, the other plate-shaped portions forming the L-shape are in a state of facing each other with the axis interposed.

Each of the carrier plates 10 and 10 has a holding portion 11 and 1 which is bent so as to extend toward the shuttle along the axial direction.
One end of each of the holding parts 11 and 11 is fixed, and bobbin case gripping means (not shown) for gripping or releasing the bobbin case is provided at the other end of the holding parts 11 and 11 (end facing the shuttle). Are fixed respectively. The bobbin case gripping means is described, for example, in an automatic bobbin thread feeder of Japanese Unexamined Patent Publication No. 5-192476 or in a sewing machine of Japanese Patent Application No. 5-121960 previously filed by the present applicant. Including a pair of electromagnet adsorption heads, which are already applied, for example, Japanese Patent Application No. 5-1163 filed by the applicant earlier.
Appropriate ones such as those with lever claws described in the automatic bobbin thread feeder of the sewing machine of No. 63 can be adopted. The point is that the bobbin case 2 is provided with a facing member (for example, a hook) as needed. Anything that can be attached to and detached from 1) may be used.

Returning to FIG. 1 to FIG. 6 again, a rotary gear 13 is fixed to the outer periphery of the carrying block 12, and the rotary gear 13 has a hook shaft 1a as shown in FIG. A drive gear 19 having an elongated shape meshes with the direction. One end of the drive gear 19 is rotatably supported by a portion of the motor fixing plate 21 attached to the base plate 3 that protrudes toward the other end of the transport shaft, and the other end is fixed to the motor fixing plate 21. The rotary shaft 20 is directly connected to the output shaft of the rotary motor 20.

Therefore, when the rotation motor 20 rotates, the transfer block 12 is moved through the drive gear 19 and the rotation gear 13.
Also, a rotating arm 70 as a rotating means composed of the transport plates 10, 10 and the holding portions 11, 11 is adapted to rotate. In this embodiment, the rotating operation of the rotating arm 70 is performed when the rotating arm 70 is in the retracted position (see FIGS. 3 to 5). Further, the transport shaft 4 is cantilevered, but since it is guided by the drive gear 19, its supporting strength is sufficient.

A not-illustrated stop ring, for example, is fixed to the outer periphery of the transport block 12 on the fixed end side of the transport shaft 4 with respect to the rotary gear 13, and the rotary gear 13 and the stop on the outer periphery of the transport block 12 are fixed. A linear motion collar 14 is rotatably supported between the ring and the ring.

As shown in FIGS. 2 to 4, one end of a rack 16 movably supported in parallel with the shuttle shaft 1a is fixed to the translation collar 14, and the rack 16 is fixed.
The pinion 17 meshes with the other end of the. The pinion 17 is fixed to the output shaft of a moving motor 18 attached to the base plate 3.

Therefore, when the moving motor 18 is driven, the linearly moving collar 14 and the rotating arm 70 move along the axial direction of the transport shaft 4 together with the rack 16 via the pinion 17. That is, the rotating arm 70
Can rotate with respect to the transport shaft 4 and can slide along the transport shaft 4.

A sensor fixing plate 33 is attached to the open end side of the transport shaft 4, and a rotation sensor 31 including a light emitting element 31a and a light receiving element 31b is attached on the sensor fixing plate 33. ing. In addition, as shown in FIGS. 2 and 3, the sensor plate 3 is attached to the rotating arm 70.
2 is fixed, and the rotation sensor 31 and the sensor fixing plate 3 so that the sensor plate 32 can pass between the light emitting element 31a and the light receiving element 31b when the rotation arm 70 rotates.
3 and the position of the sensor plate 32 are adjusted.

As shown in FIGS. 2 and 4, the base plate 3 has a linear motion sensor 41 having the same structure as the rotation sensor 31.
Is attached. Further, the sensor plate 15 is fixed to the rack 16, and when the rotating arm 70 is linearly moved, the sensor plate 15 is a light emitting element 41 a of the linear movement sensor 41.
The positions of the linear motion sensor 41 and the sensor plate 15 are adjusted so that they can pass between the light receiving element 41b and the light receiving element 41b.

A dummy shaft 6 as a bobbin case holding means is provided at a position opposite to the rotation locus of the bobbin case holding means on the base plate 3 and immediately below the shuttle 1 as shown in FIG. Is fixed. As shown in FIG. 6 in particular, the dummy shaft 6 has the same structure as the inner hook shaft 5, and the bobbin case 2 in which the bobbin is housed.
The bobbin case 2 can be held by pushing. Then, the existing bobbin locking claw 2d of the bobbin case 2 that has been pushed in is configured to engage with the locking groove of the detent member 5aa projecting near the dummy shaft 6, as shown in FIG. Has been done. That is, the bobbin case 2 is positioned and held at a predetermined position.

By the way, the lower thread winding position C and the residual thread removing position B are, as shown in FIG. 1, a range V below the conveying shaft 4 and a sewing machine bed 10 from an upright plane along the coaxial line.
It is located in the range W on the side of the rotation fulcrum 103a when raising 1a and at a position opposite to the rotation trajectory of the bobbin case gripping means. The residual thread removing position B is arranged below the lower thread winding position C. The position of the residual thread removing position B in the transport axis direction (the direction perpendicular to the paper surface in FIG. 1) is the retracted position of the bobbin case holding means, and the lower thread winding position C
The position in the transport axis direction is at a position where the bobbin case gripping means is advanced a little from the retracted position (a position advanced toward the paper surface in FIG. 1). Incidentally, reference numeral 10 in FIG.
2a is a sewing table, 106a is an oil pan,
Reference numerals 04a and 105a denote a lower shaft, and X denotes a rotation locus on the outer peripheral side when the sewing machine head is raised.

At the residual yarn removing position B, a residual yarn removing device 161 is arranged. The residual yarn removing device 161 has, for example, a holding member capable of holding or releasing the tip end of the yarn wound on the bobbin, and is held by the holding member by rotating about one axis by, for example, driving a motor. A bobbin thread that can be automatically wound is used, but the point is that the bobbin case 2 is handed over to a state in which the bobbin case 2 is held by the bobbin case holding means or a means capable of holding the bobbin case. With the bobbin case 2 held by the bobbin case 2, the bobbin is rotated by the thread drawing operation of the drawing means for drawing the thread wound around the bobbin and drawn (dripping) from the bobbin case, and the thread wound around the bobbin is drawn out. As long as it is such a thing, for example, Japanese Patent Application No. 5-203610 filed by the applicant earlier, Gantaira 6-4035
Appropriate ones can be adopted including the bobbin residual yarn removing device described in No. 1 specification.

At the lower thread winding position C, the lower thread winding device 16 is provided.
2 are provided. As the lower thread winding device 162, for example, an apparatus that can automatically wind the lower thread around the bobbin by rotating the bobbin by driving a motor or the like is adopted. The lower thread winding device 162 includes a lower thread winding mechanism (bobbin driving mechanism) E, a guide mechanism G, and a thread tension applying mechanism F. The thread tension applying means F applies tension (resistance) to a bobbin thread from a bobbin winding as a bobbin thread supply source (not shown).
And the bobbin thread is fed out downstream, and the guide mechanism G guides the bobbin thread end portion from the thread tension applying means F into the opening of the bobbin case 2. E is for rotating the bobbin in the bobbin case 2. By such bobbin rotation, the lower thread from the bobbin guided into the bobbin case from the opening of the bobbin case 2 is wound around the bobbin. It has become.

The lower thread winding device 162 is provided with a thread hooking device (not shown). This thread hooking device has a moving knife threading device rotatably arranged around the bobbin case 2 set at the bobbin winding position C, and the moving knife threading device is wound around the bobbin case 2. By moving the bobbin, the lower thread from the bobbin wound around the bobbin and led out from the opening of the bobbin case is guided to the lower thread leading hole under the lower thread tension spring of the bobbin case 2 and led out from the lower thread leading hole. The bobbin thread from the bobbin can be drawn out from a predetermined position under the bobbin thread tension spring.

The lower thread winding device 162 is further provided with a thread cutting device (not shown). This thread cutting device
The bobbin thread from the bobbin that is drawn out from the bobbin thread exit hole and drawn out from the predetermined position under the bobbin thread tension spring is separated by the rotating operation of the moving knife thread separating section, and left for a predetermined length with the fixed knife. It can be disconnected.

As the bobbin winding device 162, the yarn hooking device, and the thread trimming device as described above, appropriate devices are adopted, including, for example, Japanese Patent Application No. 7-103086 filed previously by the present applicant. be able to.

When the residual yarn removing device 161 and the bobbin winding device 162 come into contact with the base plate 3, the base plate 3 is appropriately cut. Further, the residual thread removing position B, the bobbin thread winding position C, and the bobbin attaching / detaching position D with respect to the dummy shaft 6 are close to each other, and the holding portion 11 is exaggerated. For this reason, the holding unit 11 causes the residual thread removing device 161 and the bobbin thread winding device 1 to operate.
Although there is a concern that it may come into contact with 62, in reality, a sufficient space is secured so that such contact does not occur.

By the way, in this embodiment, the bobbin case gripping means has the bobbin case attaching / detaching positions (hook position; dummy shaft position) A and D by the moving motor 18 and the retracted position moved to the opposite hook side. Can be moved to. That is, when the bobbin case gripping means moves to the retracted position, the sensor plate 15 shields between the light emitting element and the light receiving element of the linear motion sensor 41, whereby the bobbin case gripping means moves to the retracted position. Is detected. Then, the origin position is searched at this retracted position. That is, if the bobbin case gripping means is rotated at the retracted position and the position where the sensor plate 32 shields the light emitting element 31a and the light receiving element 31b is set as the origin position, for example, the bobbin case gripping means is rotated to this position. If it does, it will return to the origin position. When a pulse motor, for example, is used as the rotation motor 20, the number of pulses of the pulse motor is counted so that the bobbin case gripping means is moved to the shuttle hook position A, the bobbin thread winding position C, and the residual thread removal. The rotation can be controlled to the position B and the dummy position D.

Here, in the present embodiment, the rotary arm 20 is at the retracted position and the position where the bobbin case 2 gripped by the bobbin case gripping means faces the shuttle 1 is set at the rotary arm 70 (bobbin case gripping). Means) as the origin position.

Further, an operation panel (not shown) is attached to the above-mentioned automatic bobbin thread feeder.
A power switch, an operation switch, a setting switch as a bobbin thread amount setting means, and an error display window are attached to the bobbin thread automatic supply control device. The bobbin thread automatic supply control device will be described below.

First, as shown in FIG. 7, the sewing machine main body 100 for executing a predetermined sewing operation is provided with a power switch (power switch on the sewing machine side) 101 for turning on / off the main power supply. A sewing machine power supply monitoring means (sewing machine power supply monitoring circuit) 301 for discriminating whether the power switch 101 is on or off is additionally provided. This sewing machine power supply monitoring means 301 is a power supply energization control device 3 described later.
00 (see FIG. 8), specifically, for example, a power source of +5 V in the sewing machine control circuit is monitored, and the OFF detection signal of the power switch 101 is sent to the power supply energization control device 300. It has a function of outputting to the energization timing control means 302 (described later).

On the other hand, the main power supply is also connected to the DC power supply circuit 304 via a relay switch 303 which constitutes a control switch means of the power supply energization control device 300 described later. DC power supply circuit 30 of this power supply energization control device 300
4 is a bobbin thread winding device 162 described above.
(To be precise, it also includes a thread hooking and thread cutting device), a residual thread removing device 161 and a bobbin exchanging device 160, which are connected so as to supply drive currents, respectively, and are connected to the relay switch 3
Each device 1 based on the ON / OFF signal emitted from 03
It is configured to control the energization of 60, 161, 162.

Further, each of the drivers 104 to 107 of the bobbin thread winding device 162, the residual yarn removing device 161, the bobbin exchanging device 160 and the relay switch 303 is connected to a CPU (central processing unit) via an i / o port 108. 110 and ROM 111 and RAM attached to this CPU 110
It is connected so that each signal from 112 is input. Then, as shown in FIG. 8, each of the above-mentioned devices 162, 161 and 160 has a lower thread automatic feeder control means 2
The predetermined operation described above is executed while being controlled by the control unit 00, and the energization state of the automatic bobbin thread feeder control means 200 is set so as to enable this execution.
00 is controlled.

That is, as shown in FIG. 8, the bobbin thread automatic feeding device control means 200 includes a bobbin thread winding device control means 201, a bobbin exchange device control means (bobbin transfer / detachment device control means) 202, and a remaining amount. Thread removing device control means 20
3, and each of these control means 201,
02 and 203 are supplied with a predetermined drive current from the DC power supply circuit 304 of the power supply energization control device 300, and similarly an operation command signal from the energization timing control means 302 of the power supply energization control device 300 is applied. ing.
The energization timing control means 302 includes a bobbin winding device 162, a residual yarn removing device 161, and a bobbin changing device 16.
It has a function of constantly monitoring each operation of 0.

Further, the energization timing control means 302
A detection signal from the above-mentioned sewing machine power source monitoring means 301, that is, a signal which detects the on / off state of the sewing machine power source switch 101, is applied to. Then, when the energization timing control means 302 receives the off detection signal of the sewing machine power switch 101, the energization timing control means 302 completes the processing operation of the device which is in the middle of operation at the time of the power-off, and thereafter is scheduled to be performed following this processing operation. If there is a necessary processing operation before the bobbin replacement, the processing operations are sequentially completed to enter the bobbin replacement standby state, that is, the processing necessary for the bobbin replacement (remaining thread removing processing, bobbin winding processing, thread hooking processing). , Bobbin case is moved to the retracted position (origin position) facing the hook after all the thread cutting processing) has been completed, and each of the control means 201, 202, 203 described above has a function of issuing an operation command signal. are doing.

Further, the energization timing control means 302
Is an operation command signal for advancing the bobbin case, which has been subjected to the processing necessary for bobbin replacement, from the origin position to a position where the bobbin case approaches the shuttle 1 when the bobbin case is in a standby state for bobbin replacement. Is issued to the bobbin exchange device control means 202 described above.

Further, the energization timing control means 302
Has a function of issuing a processing completion signal to the control switch means 303 when the bobbin exchanging device 160 advances the bobbin case from the origin position to the position where the bobbin case faces and approaches the shuttle 1. On the other hand, control switch means 303
Is composed of a power relay switch, a solid state relay, etc., and is always supplied with an AC drive current regardless of the sewing machine power switch 101. Then, the control switch means 303 is configured to receive a processing completion signal from the above-described energization timing control means 302 and output an OFF command signal to the DC power supply circuit 304. DC power supply circuit 3 which received this OFF command signal
04 will stop the supply of the drive current to the control means 201, 202, 203 and the devices 160, 161, 162.

As described above, since the bobbin case, which has been subjected to the necessary processing for bobbin exchange, is located close to and facing the hook 1, the bobbin in the hook 1 and the bobbin in the hook 1 must be retracted unless forcedly retracted. It is difficult to intervene in the bobbin case, the bobbin that is opposed to the bobbin case, and the bobbin case. That is, the bobbin and the bobbin case are prevented from being inadvertently touched unless necessary.

Further, the energization timing control means 30
The processing completion signal issued from 2 is also applied to the RAM (nonvolatile memory) 112 as the cutoff information storage means. The RAM 112 is composed of a battery backup RAM, an EEPROM or the like,
Information on whether the power is cut off normally or abnormally (for example, during a power failure) is stored and stored in the RAM 112.
On the other hand, the power cutoff normality or abnormality information stored in the RAM 112 is constantly referred to by the energization timing control means 302, and the power cutoff normality or abnormality information stored in the RAM 112 is supplied to the energization timing control means 302. Has been confirmed in. Then, the energization timing control means 302 is configured to issue an initialization signal to each of the control means 201, 202 and 203 based on the confirmed normal or abnormal information of power shutoff.

Further, the energization timing control means 302
A predetermined display means 305 is connected to the R
The power shutoff normality or abnormality information stored in the AM 112 is displayed.

Further, the energization timing control means 30
2 has a function of issuing an operation command signal to the bobbin exchanging device control means 202 so that the origin is detected from a position where the bobbin case is opposed to and approaching the shuttle 1 when the re-on detection signal of the sewing machine power switch 101 is received. Have

Further, the power supply energization control device 300 includes
In addition to receiving the detection signal from the sewing machine power source monitoring means 301, the operation of the bobbin exchanging device 160 is monitored, the re-on detection signal of the sewing machine power source switch 101 is received, and the origin is detected from the position where the bobbin case faces the hook 1 in the opposite direction. When the origin is detected, it is determined whether or not the number of steps when the origin is detected is the same as the number of steps when the bobbin case is advanced to the position where the bobbin case is opposed to the hook 1. Before turning on the switch 101 again,
The human intervention determination means 800 for determining that the bobbin and the bobbin case inside the bobbin and the bobbin case facing the shuttle 1 have been intervened (taken out and performed some treatment although no trouble has occurred) is provided. Has been.

When the human intervention determination means 800 determines that the human intervention has intervened in the bobbin and the bobbin case before the sewing machine power switch 101 is turned on again, the display means 305 warns that the human intervention has occurred. It is configured to display. That is, the operator is urged to check.

When the manual intervention determining means 800 determines that the manual operation has not intervened in the bobbin and the bobbin case before the sewing machine power switch 101 is turned on again, the energization timing control means 302 described above determines a predetermined value. The operation command signal for continuing the process is sent to each of the control means 20 described above.
1, 202 and 203 respectively.

Next, the control operation using such a control device will be described with reference to the flow chart shown in FIG. Considering the ease of understanding, the explanation will be given from the start of the sewing operation. That is, first, in step 5, RAM
When the (non-volatile memory) 112 is cleared, the automatic bobbin thread feeder is put into the operation start standby state. Then, in step 6, it is determined whether or not there is a bobbin replacement request. The bobbin replacement request is automatically generated by the automatic bobbin thread feeder when, for example, the bobbin remaining yarn in the shuttle becomes small, or when the operator turns on the replacement request switch.

Then, if there is a bobbin exchange request by any of these, the process proceeds to step 7, and in step 7,
First, the bobbin is replaced. At this point, the one bobbin case 2Y gripped by the bobbin case gripping means is at the origin position, that is, the retracted position facing the shuttle 1 by the operation of step 4 described later (see FIG. 6). For convenience of description, this bobbin case is 2Y and the bobbin case in the shuttle is 2X.

Then, the rotating arm 70 is rotated 180 ° so that the bobbin case gripping means not gripping the bobbin case faces the hook 1, and then the bobbin case 2X in the hook is advanced by the bobbin case gripping means. It is gripped, and then the rotating arm 70 is retracted. Then, the rotating arm 70
Is rotated 180 ° to make the bobbin case 2Y face the shuttle 1 and then move forward to mount the bobbin case 2Y in the shuttle, and then the rotating arm 70 is retracted.

Then, the rotating arm 70 is rotated to move the bobbin case 2X taken out from the shuttle to the residual thread removing position B, and the residual thread removing device 161 causes the bobbin case 2 to move.
Remove the bobbin residual yarn in X.

Then, the rotating arm 70 is rotated to face the bobbin case 2X containing the bobbin from which the residual yarn is removed to the bobbin winding position C, and then to move the bobbin case 2X forward to move the bobbin case 2X to the bobbin winding position C. The bobbin thread is wound around the bobbin in the bobbin case 2X by the bobbin winding device 162.

Then, while the bobbin case 2X is kept at the bobbin winding position C, the bobbin wound on the bobbin by the thread hooking device is hooked on the bobbin case to set a predetermined value under the bobbin tension spring. The yarn is pulled out from the position, and then the yarn cutting device cuts the led-out yarn leaving a predetermined length. At this point, the necessary processing before the bobbin replacement is almost completed. Then, the rotating arm 70 is retracted and then rotated so that the bobbin case 2X faces the hook 1, and the bobbin replacement standby state is entered, and the process proceeds to step 8.

Then, in step 8, it is judged whether or not the sewing machine power switch 101 is off. Therefore, even if the sewing machine power switch 101 is turned off during the processing operation of each device in step 7, the series of processing operations in step 7 are all performed to enter the bobbin replacement standby state. Then, in step 8, if it is determined that the sewing machine power switch 101 is on, the process returns to step 6, and if it is determined that it is off, that is, if the sewing machine power switch 101 is turned off by the operator, the process proceeds to step 9. .

On the other hand, if there is no bobbin replacement request in step 6, the process proceeds to step 15 and step 1
At 5, it is determined whether the sewing machine power switch 101 is off, and if it is determined to be on, the process returns to step 6. That is, when the sewing machine power switch 101 is turned on, the bobbin case held by the bobbin case holding means is positioned at the origin position, that is, the bobbin replacement standby state, and the bobbin replacement request is waited. When it is determined in step 15 that the sewing machine power switch 101 is off, the process proceeds to step 9 as in step 8.

Then, in step 9, the rotary arm 70 is moved forward by a predetermined number of steps to move the bobbin case 2X to the position where the bobbin case 2X approaches and approaches the shuttle 1 as shown in FIG. As a result, the bobbin case 2X and the bobbin case 2Y in the shuttle cannot be taken out unless the rotating arm 70 is forcibly rotated or retracted by hand. Incidentally, in the present embodiment, since there is an obstacle around the bobbin case holding means at this position, the rotation of the rotating arm 70 is restricted, and the rotation is not possible.

Then, the process proceeds to step 10 and step 1
At 0, the current state is RAM (non-volatile memory)
In addition to being stored in the RAM 112, the fact that the normal power-off processing has been performed is stored in the RAM 112. Then, proceeding to step 11, in step 11, the relay switch 303 is turned off to cut off the power source of the automatic bobbin thread feeder.

After that, when the sewing machine power switch 101 is turned on again, the process returns to step 1 shown in FIG. 9, and the information on the state at the time of the previous power shutdown and whether or not the normal power shutdown process has been performed. Is read from the RAM 112.

Next, in step 2, in step 2, it is judged whether or not the previous normal power-off processing was performed, and if it is normal power-off processing, that is, the operator turns off the sewing machine power switch 101. If so, the process proceeds to step 3. If not, for example, if the power is not shut down normally due to an unexpected power failure or the like, an error is displayed by the display means 305 such as an error display window and a warning buzzer. Then, the intervention of the operator is prompted and the process proceeds to step 12.

In step 3, the rotary arm 70 is retracted by a predetermined number of steps to detect the origin. In step 4, it is determined whether or not the origin has been detected with the same number of steps as above (step 9). Here, sewing machine power switch 1
When the operator takes out the bobbin case 2X and the bobbin case 2Y in the shuttle while 01 is off, the position of the rotating arm 70 has moved from the position where the rotary arm 70 is opposed to and approaches the shuttle 1 as described above. The origin is not detected with the same number of steps. On the other hand, if the operator has not taken out the bobbin case 2X and the bobbin case 2Y in the shuttle, the rotating arm 7
Since the position of 0 is in a position where the rotary arm 70 approaches and approaches the shuttle 1, the rotating arm 70 returns to the original position in the same number of steps as above. Then, when the origin is not detected in the same number of steps, that is, when the bobbin case 2X and the bobbin case 2Y in the hook are taken out, an error display is made by the display means 305 such as an error display window and a warning buzzer.
The intervention of the operator is prompted and the process proceeds to step 12.

When the rotating arm 70 is retracted by the same number of steps as above (step 9), the bobbin case 2
It is also possible to determine whether X is at the origin position and thereby determine whether the operator has taken out the bobbin case 2X and the bobbin case 2Y in the shuttle.

At step 12, the initialization operation is performed in the most efficient manner. Then, when this initialization operation is completed, the process proceeds to step 13, and in step 13,
Waiting for the operator's intervention, the bobbin check and the resetting are performed by the operator, and the process proceeds to step 14. In step 14, the residual thread removing process, the bobbin thread winding process, the thread hooking process, which are the same as those described in step 7 above, are performed. The thread winding process is performed and the process proceeds to step 5. Further, in step 4, the bobbin case 2X is returned to the origin in the same number of steps as above (step 9), that is, the bobbin case 2X,
Even if the bobbin case 2Y in the shuttle has not been taken out, the process proceeds to step 5.

Then, as described above, in step 5, the RAM (non-volatile memory) 112 is cleared, the automatic bobbin thread feeder is put in the operation start standby state, and the sewing operation is executed. The same operation is repeated thereafter.

As described above, in the present embodiment, the bobbin changing device 160, the residual yarn removing device 161, the lower yarn winding device 162, the yarn hooking device and the thread trimming device which constitute the automatic lower yarn supplying device are in operation. Even if the power is suddenly shut off (by the sewing machine power switch 101),
The sewing machine power switch 1 by the power supply energization control device 300
If the processing operation of the device that is operating when 01 is shut off is completed and then there is a necessary processing operation before the bobbin replacement scheduled to be performed following this processing operation, the processing operation is sequentially completed and the bobbin replacement standby After that, the power to each device is cut off to prevent a trouble such as thread entanglement, and the power supply can be cut off arbitrarily. Moreover, the sewing machine power switch 1
Since the bobbin can be immediately replaced when 01 is re-input, each device of the automatic bobbin thread feeder can be protected when the power is cut off, and troubles such as thread entanglement can be avoided in advance. It is possible to improve the reliability of the automatic bobbin thread feeder and
It is possible to reduce the loss time of the automatic bobbin thread feeder.

Further, by the power supply energization control device 300,
After the bobbin exchange standby state, an operation command is given to the bobbin exchange device 160 to move the bobbin case, which has been subjected to the process required for bobbin exchange, to a position where the bobbin case approaches and approaches the hook 1, and then the power to each device is cut off. , While the power is off,
The bobbin case and the bobbin in the shuttle are configured so that it is difficult to manually intervene with the bobbin case and the bobbin in the standby state, which have been processed by the bobbin changing device 160 and have undergone the necessary processing. Power switch 101
It is possible to improve the possibility of continuing the processing operation after the re-input of.

Further, by the power supply energization control device 300,
When the sewing machine power switch 101 is turned on again, a predetermined movement operation command is given to the bobbin exchanging device 160, and a movable part (rotating arm 70, bobbin case gripping means, etc.) of the bobbin exchanging device 160 according to this movement operation command is given. Based on the movement, the manual intervention determination means 800 performs processing necessary for bobbin case and bobbin in the hook and bobbin exchange before the sewing machine power switch 101 is turned on again.
When it is determined whether human intervention has occurred in the waiting bobbin case and bobbin gripped by 60, and when it is determined that human intervention has occurred, the operator performs a check, and when it is determined that human intervention has not occurred. Is configured to continue the continuous processing, the sewing machine power switch 10
It is possible to prevent the occurrence of defects after the re-input of No. 1 and improve the automation rate.

In addition, this embodiment has the following effects. That is, based on the normality / abnormality information of the power interruption stored in the interruption information storage means (RAM) 112,
It is determined whether or not a normal power-off process has been performed, and if it is abnormal, it is displayed on the display unit 305, so that error check work and recovery work can be performed extremely easily.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say, for example, in the above-described embodiment, after the bobbin replacement standby state, an operation command is given to the bobbin replacement device 160 and the bobbin case on which the necessary processing for bobbin replacement is performed is opposed to the hook 1. It is arranged to move to a position where they approach each other, and then to interrupt the energization to each device. Instead of this, for example, one of the residual yarn removing device 161, the bobbin thread winding device 162, the yarn hooking device, and the thread cutting device is used. One or more devices and bobbin exchanging device 1
Using 60 and, when the power supply of the sewing machine is cut off, the operation of the device in the middle of the operation is immediately stopped, or only the operation of the device in the middle of the operation is completed and then the bobbin case is moved to the position where the bobbin case faces the hook 1 in the opposite direction. In this way, the power supply to each device is cut off to make it difficult for human intervention before the power is turned on again. At the time of turning the power on again, the power supply energization control device 300 (manual intervention determination means 800) is used before the power is turned on again. It is also possible to determine whether or not the intervention has occurred, and to prevent the occurrence of problems and the possibility of continuing the processing operation after the power is turned on again, and improve the automation rate.

[0076]

As described above, according to the bobbin thread automatic feed control device of the first aspect, the residual yarn removing device, the bobbin thread winding device,
The operations of the thread hooking device, thread trimming device, and bobbin changing device are constantly monitored to complete the processing operation of the device that is in operation when the power switch is cut off, and then bobbin replacement that is scheduled to be performed following this processing operation. If there is a necessary processing operation before, the processing operation is completed in sequence to put the bobbin in a standby state, and then a power supply control device that shuts off the power supply to each device is provided. Even if the power is cut off, the power supply energization control device completes a series of processing operations and puts it in a bobbin replacement standby state, and then cuts off the power supply to each device to prevent yarn entanglement and other obstacles and to optionally cut off the power supply. Since the bobbin can be replaced immediately when the power is turned on again, each device of the automatic bobbin thread feeder is protected when the power is cut off and the thread is not entangled. It is possible to avoid the trouble in advance, it becomes possible to improve the reliability of the lower thread automatic supply device, it is possible to reduce the loss time of the lower thread automatic feeder.

According to the bobbin thread automatic feed control device of claim 2, in addition to claim 1, the power supply energization control device gives an operation command to the bobbin exchanging device after the bobbin exchanging device is in a standby state. Move the bobbin case that has undergone the necessary processing for replacement to a position facing the shuttle, and then turn off the power to each device.While power is off, the bobbin case and bobbin inside the shuttle, and the processing required for bobbin replacement Since it is configured to make it difficult to manually intervene in the waiting bobbin case and the bobbin held by the bobbin exchanging device, the possibility of continuing the processing operation after the power is turned on again is improved. It becomes possible.

According to a third aspect of the present invention, in addition to the first aspect, the power supply energization control device issues a predetermined moving operation command to the bobbin exchanging device when the power switch is turned on again. Based on the movement of the movable part of the bobbin exchanging device according to this movement operation command, the manual intervention determination means performs the processing required for bobbin case and bobbin exchange in the shuttle before the power switch is turned on again. It is determined whether or not human intervention has intervened in the bobbin case and the bobbin that are held by the bobbin exchanging device, and if it is determined that human intervention has occurred, for example, an operator performs a check, and it is determined that human intervention did not occur. When the determination is made, for example, the continuous processing is configured to be continued, so that it is possible to prevent the occurrence of a trouble after the power is turned on again and improve the automation rate. Theft is possible.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an automatic bobbin thread feeder according to an embodiment of the present invention.

FIG. 2 is a front view of a bobbin changing device adopted in the same upper and lower yarn automatic feeding device.

FIG. 3 is a plan view of the above bobbin changing device.

FIG. 4 is a right side view showing a direct-acting mechanism portion of the above bobbin changing device.

FIG. 5 is a right side view showing a rotation mechanism portion of the above bobbin changing device.

FIG. 6 is a schematic right side view for explaining dummy positions and dummy shafts of the bobbin changing device of the above.

FIG. 7 is a block diagram showing the configuration of the entire apparatus in one embodiment of the present invention.

FIG. 8 is a block diagram showing a control system in an embodiment of the present invention.

FIG. 9 is a flow chart showing a flow of a control operation procedure of the same upper and lower yarn feeders.

FIG. 10 is a right side view showing only the essential parts of the bobbin changing device when the power to each device is cut off.

[Explanation of symbols]

 1 hook 2, 2X, 2Y bobbin case 70 rotating arm 101 power switch 160 bobbin changing device 161 residual thread removing device 162 bobbin winding device 300 power supply energization control device 800 human intervention determination means A hook position B, C processing of each device Operating position

Claims (3)

[Claims] 1. A residual thread removing device for removing residual thread of a bobbin, a bobbin winding device capable of winding a bobbin from a bobbin supply source on a bobbin, and a bobbin winding device. A thread hooking device that can hook the bobbin case on the bobbin case, a thread trimming device that can cut the bobbin thread that has been threaded from the bobbin case with a predetermined length left, and a bobbin case that holds the bobbin. Or a bobbin exchanging device which is provided with an openable bobbin case gripping means and is capable of moving the bobbin case gripping means to a shuttle position and a processing operation position of each device. It constantly monitors the operation of the device, completes the processing operation of the device that is in the middle of operation when the power switch is cut off, and then performs the necessary processing operation before bobbin replacement that is scheduled to be performed following this processing operation. That the processing operation is sequentially completed and the bobbin replacement standby state when, after the lower thread automatic supply control apparatus characterized in that it has a power energization control device for interrupting the power supply to each device. 2. The automatic bobbin thread supply control device according to claim 1, wherein the power supply energization control device is in a bobbin replacement standby state,
A bobbin automatic device characterized in that an operation command is given to the bobbin changing device and the bobbin case, which has been subjected to the processing necessary for bobbin changing, is moved to a position facing the hook and facing, and then the power supply to each device is cut off. Supply control device. 3. The bobbin thread automatic feed control device according to claim 2, wherein the power supply energization control device gives a predetermined moving operation command to the bobbin exchanging device when the power switch is turned on again. A bobbin thread automatic feed control device characterized by comprising human intervention judgment means for judging whether or not human intervention has occurred before the power switch is turned on again based on the movement of the movable part of the bobbin changing device. .