JPH0616612Y2 - Bobbin bobbin automatic winding device - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a bobbin thread automatic winding device for a bobbin thread bobbin used in a sewing machine including an embroidery machine.

[Prior art]

Conventionally, a bobbin bobbin winding device built into a machine frame of a sewing machine is generally equipped with an upper shaft engaging / disengaging device in a high-class sewing machine or the like, and when the bobbin is wound, the operation on the needle drive side of the upper shaft is disconnected from the drive source. The needle is not moved up and down, so a safe condition can be obtained. However, since lower-class sewing machines and the like do not have an upper shaft engaging / disengaging device, the needle is moved up and down by the rotation of the upper shaft during thread winding, which is in a dangerous state. As a measure for bobbin winding on the above-mentioned lower class sewing machine, the bobbin winding device is not built in the sewing machine frame, and the bobbin winding device is configured as a bobbin winding unit different from the sewing machine, and the bobbin winding unit is placed at an appropriate position such as a sewing table. It has been proposed to attach it to a sewing machine and use it as a system combined with a sewing machine (hereinafter referred to as a sewing machine system). When using such a sewing machine system, the bobbin winder unit is subordinate to the sewing machine, the power switch is provided on the main sewing machine side, and the bobbin winder unit side has a power switch different from the power switch on the sewing machine side. Is generally not provided. The reason is that if the power switch on the sewing machine side is turned on at the start of use of the sewing machine system, it is desirable that the sewing machine and the thread winding unit subordinate thereto can be used by operation. When a power switch is provided, these two power switches must be turned on at the start of use of the sewing machine system, and it is easy to forget to turn off one of the power switches at the end of use of the system, which is convenient for operation. This is because the inconvenience of being bad occurs. This is hereinafter referred to as "operational problem of the sewing machine system". However, when the power switch is provided only on the main sewing machine side of the sewing machine system as described above in order to prevent the "operational problem of the sewing machine system", the following problems occur. That is, the conventional bobbin winding unit has a structure in which the bobbin winding operation is started and automatically stopped when a predetermined amount of the bobbin thread is wound on the bobbin bobbin. If this occurs, it may be necessary to turn off the power switch only on the sewing machine side of the sewing system in order to make an emergency stop of the spool unit. As a problem in this case, when the above-mentioned inconvenience in the bobbin winding work occurs while winding the bobbin, the power switch on only the sewing machine side of the sewing machine system is turned off so that the embroidery machine is performing embroidery. If the work is interrupted, or the pattern is selected with the sewing machine and the program is input, and the bobbin thread runs out in the bobbin thread bobbin during the program sewing, the program sewing is interrupted and the bobbin winding work is performed. However, there is a problem that the programmed contents are lost when the power switch is turned off. Hereinafter, these problems will be referred to as "the problem of loss of data and the like due to the power switch". The above-mentioned "problems in operating the sewing machine system" and "problems of data loss due to the power switch"
As described above, the arrangement and number of power switches in the sewing machine system are different, and it has been considered that solving both of them is a difficult problem.

[Problems to be solved by the device]

The problem to be solved by the present invention is to provide a bobbin winding device for a bobbin thread which is composed of a unit different from the sewing machine and is used in combination with the sewing machine, and which is driven by a drive source different from the drive source for driving the sewing machine. Firstly, by providing it, it is possible to mount it on a sewing machine that does not have a thread winding device or a sewing machine that does not have an upper shaft engaging / disengaging device, and start winding the lower thread on a lower thread bobbin by manual operation. After that, when a predetermined amount of the bobbin thread is wound on the bobbin bobbin, the drive motor of the bobbin winder is stopped and the bobbin winder is automatically stopped. Secondly, a bobbin winding device for a lower thread, which is constituted by a unit different from the sewing machine and is driven by a driving source different from the driving source for driving the sewing machine, It is an object of the present invention to provide a sewing machine system which solves the above-mentioned "problem in operation of the sewing machine system" when attached to an embroidery machine and the above-mentioned "problem of loss of data etc. due to power switch".

[Means for solving problems]

The present invention relates to a bobbin winding device for a bobbin thread, which is composed of a unit different from a sewing machine and is used in combination with a sewing machine, and is driven by a driving source different from a driving source for driving the sewing machine. Drive motor M mounted on
A bobbin mounting shaft that is decelerated and rotated by a bobbin, a bobbin winding switch and a winding detection switch that are mounted on a base plate fixed to the mechanism base and that controls the drive and stop of the drive motor, and are slidable on the front base plate. A switch operation plate which is disposed and has an operation portion for manual operation formed at an end thereof. The switch operation plate is actuated by the operation portion in one direction at the start of winding of the thread to act on the thread winding switch to drive the drive motor M. Bobbin thread provided with a switch operation plate having a plurality of functions for urgently stopping the drive motor M when a trouble occurs during thread winding due to a movement operation in the opposite direction by the operation section. An automatic winding device is provided.

[Action]

According to the present invention, it is configured by a unit different from the sewing machine,
By providing a bobbin winder driven by a drive source different from the drive source of the sewing machine, it is possible to mount the bobbin winder on a sewing machine that does not have a bobbin winder or a sewing machine that does not have an upper shaft engaging / disengaging device. After the bobbin is wound onto the bobbin bobbin by manual operation, and the bobbin is wound on the bobbin bobbin by a predetermined amount, the drive motor of the bobbin winder automatically stops and the bobbin winder automatically It has the effect of stopping. Secondly, there is provided a sewing machine system which is constituted by a unit different from the sewing machine, and in which a bobbin winder driven by a drive source different from the drive source of the sewing machine is attached to a sewing machine or an embroidery machine which does not have an upper shaft engaging / disengaging device. With this configuration, in the present invention, when the switch operation plate slidably arranged on the base plate of the bobbin winder is moved in one direction at the start of bobbin winding by the operating portion, the drive motor M of the bobbin winder starts. Since the drive motor M is provided with a plurality of functions so as to make an emergency stop when the switch operation plate is moved in the opposite direction to the above when a trouble occurs during bobbin winding, the above-mentioned "operation of the sewing machine system" is performed. There is an effect that it is possible to provide a sewing machine system in which the above problem is solved and the above-mentioned problem of loss of data and the like due to the power switch is solved.

【Example】

Hereinafter, the present invention will be described by way of embodiments with reference to the drawings. (1) Structure of the mechanical part of the bobbin winding machine First, the structure of the mechanical part of the bobbin winding machine will be described with reference to FIGS. 1 to 3. In FIG. 1, a frame portion of a drive motor M is attached to a mechanism base 1, a bobbin mounting shaft 3 is rotatably supported (a bearing portion is not shown), and a gear 4 of the bobbin mounting shaft 3 is provided.
Is fixed, the gear 4 is engaged with the gear 5 fixed to the output shaft of the drive motor M, and the bobbin mounting shaft 3 is decelerated by the drive motor M. A bobbin bobbin 6 is detachably attached to the bobbin mounting shaft 3. The base plate 7 of the bobbin winder 21 is fixed to the mechanism base 1,
A bobbin winder switch 8 and a winding detection switch 9 are attached to the base plate 7, and a switch operation plate 10 is slidably supported on the base plate 7 and the base plate 7 has a switch operation plate 10 attached thereto. A moderation member 11 that limits the amount of sliding is attached. An operation portion 12 for manual operation is formed at an end of the switch operation plate 10, and a winding-up detection plate 13 having a substantially "V" shape is rotatably supported by a shaft portion 14 at a central portion. On the side portions, the limiting portions 15 and 16 for limiting the rotation range of the winding detection plate 13 with respect to the switch operating plate 10.
Is bent and formed. The winding detection plate 13 serves as a detection unit 17 that detects the amount of winding of the lower thread by contacting the lower thread wound on the lower thread bobbin 6 with the end surface of the upper end formed in a V shape, and the lower end. Switch pressing part 1 whose circular arc part presses the movable piece of the bobbin switch 8
8 and the side portion thereof is a switch pressing portion 19 for pressing the movable piece of the roll-up detection switch 9. A spring 20 is attached to the shaft portion 14 and urges the winding detection plate 13 to rotate about the shaft portion 14 in the arrow A direction (clockwise direction) in FIG. (2) Configuration of Control Circuit Next, the configuration of the control circuit will be described mainly with reference to FIG. Although not shown, the state of FIG. 4 shows a state in which the power switch on only the sewing machine or the embroidery machine side of the sewing machine system is turned on, and the state is indicated by the DC power source E. In the figure, the segment of the spool switch 8 is a normally closed contact N when the power switch of the sewing machine or the embroidery machine is turned on.
It is on the C side, and the normally closed contact NC side forms one input of the NAND circuit NAND and the reset terminal R of the bistable circuit F / F.
Contact point NO of the winding detection switch 9
Connected to the side. The winding-up detection switch 9 has an open section apart from the contact NO. The other input of the NAND circuit NAND is input from the DC power source E through the resistor R1 and the inverter INV. The contact NO side of the winding detection switch 9 has a resistor R2.
It is connected to the DC power source E via. The output side of the NAND circuit NAND is connected to the set terminal S of the bistable circuit F / F, the output terminal Q of the bistable circuit F / F is connected to the base of the transistor TR, and the transistor T
The R is configured to be turned on and off depending on whether the output of the output terminal Q is high level or low level, and to drive and stop the drive motor M. (3) Description of Operation Next, the operation of the embodiment of the bobbin winder 21 of the present invention configured as described above will be described. (When turning on the power of the sewing machine system) First, when the power of the sewing machine or the sewing machine system including the embroidery machine is turned on, the thread winding device 21 becomes available.
As shown in FIG. 4, since the segment of the bobbin switch 8 is on the normally closed contact NC side, the bistable circuit F / F is reset,
Since the output terminal Q of the circuit is at the low level, the transistor TR is off and the drive motor M is stopped. In this state, the switch operating plate 10 in FIG.
It is located on the arrow side, the switch pressing portion 18 of the winding detection plate 13 does not act on the movable piece of the bobbin switch 8, and the segment of the bobbin switch 8 is on the normally closed contact NC side. (Start of bobbin winding) In this state, the bobbin thread bobbin 6 is mounted on the bobbin mounting shaft 3, the end portion of the bobbin thread T is locked to the bobbin thread bobbin 6, and the switch operating plate 10 in FIG. When it is pushed and moved in the direction of arrow C, the switch pushing portion 1 of the winding detection plate 13
The movable piece of the bobbin winder switch 8 is pressed by the button 9. That is, in this state, the section of the bobbin switch 8 is switched to the normally open contact NO side in FIG.
Since the bistable circuit F / F is set via D and the output terminal Q of the circuit becomes high level, the transistor TR is turned on and the drive motor M is energized, and the rotation of the drive motor M causes the bobbin mounting shaft 3 to rotate. Is rotated and bobbin thread bobbin 6
The bobbin thread T is started to be wound. (Stop by winding detection) When the lower thread T is wound on the lower thread bobbin 6 by a predetermined amount, the detecting portion 17 of the winding detection plate 13 is pushed by the wound lower thread T, and the winding detection plate 13 is rotated. The portion 14 is rotated in the direction of arrow B (counterclockwise) in FIG. 1, and its switch pressing portion 19 acts on the movable piece of the winding detection switch 9 to shut off the power supply to the motor 2. Therefore, the rotation of the lower thread bobbin 6 is stopped. That is, in this state, in FIG. 4, since the winding detection switch 9 is closed, the bistable circuit F / F is reset and the output terminal Q of the circuit becomes low level, so that the transistor TR is turned off. The drive motor M is stopped, and the winding of the bobbin thread T on the bobbin thread bobbin 6 is completed. (Emergency stop during bobbin winding) When the user wants to stop the bobbin winding operation due to a trouble such as thread entanglement after starting the bobbin winding after operating the operation portion 12 to press the switch operation plate 10 in the direction of arrow C in FIG. When the operating portion 12 is returned to the original position on the arrow D side in FIG. 1, the switch pressing portion 18 of the winding detection plate 13 is moved to the bobbin winding switch 8
Since the motor 2 is separated from the movable piece and the power supply to the motor 2 is cut off, the rotation of the bobbin mounting shaft 3 is stopped urgently, and it is possible to deal with the occurrence of the above-mentioned trouble. That is, in this state, in FIG. 4, the segment of the bobbin switch 8 is switched to the normally closed contact NC side, and the bistable circuit F / F
Is reset and the output terminal Q of the same circuit becomes low level, the transistor TR is turned off, and the drive motor M
Stops.

【effect】

As described above, according to the present invention, by providing a bobbin winding device which is constituted by a unit different from the sewing machine and is driven by a driving source different from the driving source of the sewing machine, firstly, the bobbin winding device is provided. It is possible to mount it on a sewing machine that does not have a sewing machine that does not have an upper shaft engaging / disengaging device, and after winding the bobbin thread onto the bobbin bobbin by manual operation, wind the bobbin thread on the bobbin bobbin by a specified amount. When this occurs, the drive motor of the bobbin winder automatically stops, and the bobbin winder automatically stops. Secondly, there is provided a sewing machine system which is constituted by a unit different from the sewing machine, and in which a bobbin winder driven by a drive source different from the drive source of the sewing machine is attached to a sewing machine or an embroidery machine which does not have an upper shaft engaging / disengaging device. According to the present invention, when the switch operation plate slidably arranged on the base plate of the bobbin winder is moved in one direction at the start of bobbin winding by the operating portion, the drive motor of the bobbin winder is started. Since the drive motor is configured to have an emergency stop when the switch operation plate is moved in the opposite direction to the above when a trouble occurs during winding of the bobbin, the operation of the sewing machine system described above is performed. The effect that the "problem" is solved and the above-mentioned "problem of loss of data etc. due to the power switch" can be provided can be provided.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is an external perspective view of a bobbin winding device of the present invention, FIGS. 2 and 3 are front views of the present invention, and FIG. 4 is a control circuit of the present invention. FIG. 1 is a mechanism base, 3 is a bobbin mounting shaft, 6 is a bobbin bobbin, 7
Is a base plate, 8 is a thread winding switch, 9 is a winding detection switch, 10 is a switch operating plate, 12 is an operating part, 13 is a winding detection plate, 18 and 19 are switch pressing parts, 21 is a thread winding device, and M is a drive. The motor and T are lower threads.

Claims (1)

[Scope of utility model registration request] 1. A bobbin winding device for a bobbin thread, which comprises a unit different from a sewing machine and is used in combination with a sewing machine, and is driven by a driving source different from a driving source for driving the sewing machine. A drive motor M that is rotatably supported by the mechanism base 1 and drives the bobbin mounting shaft 3 on which the lower thread bobbin 6 is detachable, and a drive motor M that is attached to a base plate 7 fixed to the mechanism base 1. Winding switch 8 for controlling driving and stopping of the bobbin, winding detection switch 9 for stopping and controlling the drive motor M when the winding amount of the bobbin thread T reaches the bobbin bobbin 6, and the front base plate. 7 is a switch operation plate 10 slidably arranged on an end portion of which an operation portion 12 for manual operation is formed. The winding operation detection plate 13 acting on the spool winding switch 8 and the winding detection switch 9 is provided. Rotatably supported, front When the bobbin winding operation is started in one direction by the operating section 12, the bobbin detecting switch 13 acts on the bobbin winding switch 8 to start the drive motor M. When a trouble occurs during bobbin winding, the operating section 12 is operated. Bobbin bobbin thread including a switch operation plate 10 having a plurality of functions for switching the bobbin winder switch 8 by a moving operation in the opposite direction to Automatic winding device.