JPH0245089A - Embroidering device mountable to sewing machine - Google Patents

Abstract

PURPOSE:To easily and efficiently execute the attaching and detaching of a lower thread bobbin to a horizontal pot in a condition that an embroidering device is mounted to a sewing machine by providing a moving control means to control a control means so that an aperture part can move to a prescribed position to correspond to a bobbin pick-up port for an embroidery table when a lower thread bobbin attaching and detaching signal is received from a signal generating means. CONSTITUTION:In the condition that an embroidering device 1 is mounted to a sewing machine M, a bobbin pick-up port 31 is provided in correspondence to a horizontal pot 5 of the sewing machine in the needle plate of a main body frame 16. When signal generating means 85 and 86 output a lower thread bobbin attaching and detaching signal BS, the lower thread bobbin attaching and detaching signal is supplied to the moving control means and the moving control means controls the control means. Then, an embroidery table 18 is moved to the prescribed position. As a result, since an aperture part 62 of the embroidery table corresponds to the bobbin pick-up port and the bobbin pick-up port corresponds to the horizontal pot 5, a lower thread bobbin 4 can be easily attached and detached through the paerture part and bobbin pick-up port to the horizontal pot in the condition that the embroidering device is mounted to the sewing machine. Thus, when the lower thread bobbin is attached and detached, extra work or time are not needed and the operability of the embroidering device can be widely improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an embroidery device that can be attached to a sewing machine, and in particular, the present invention relates to an embroidery device that can be attached to a sewing machine. This invention relates to a bobbin thread bobbin that can be attached to and detached from a horizontal hook through an outlet.

[Prior art]

In general, in order to be able to sew letters, figures, etc. in addition to practical stitches such as straight stitches and zigzag stitches, multiple stitch data such as letters and figures are stored in a stitch pattern data memory (ROM) for each pattern number. 2. Description of the Related Art An electronically controlled zigzag sewing machine is known that sews desired characters or figures onto a workpiece cloth based on pre-stored and selected stitch data. Many electronically controlled zigzag sewing machines use a horizontal hook, which makes it possible to omit the bobbin case that houses the bobbin thread bobbin.

However, this sewing machine cannot design and sew relatively large letters and figures for embroidery sewing, so in recent years, an embroidery device that can be attached to the free arm of this sewing machine and made it possible to sew embroidery has been developed. Showa 59-75084
It is disclosed in the publication No.

This embroidery device includes an embroidery table on which the work cloth to be embroidered is attached, a main body frame equipped with a drive mechanism for moving the embroidery table in the left-right direction (X direction), and a drive mechanism for moving the embroidery table in the front-rear direction (Y direction). The sewing machine includes a control device that controls the re-driving mechanism based on embroidery data stored in a memory in advance, and the main body frame can be attached to the free arm of the sewing machine. A needle insertion opening through which a sewing needle is inserted is formed in the throat plate of the main body frame, which is disposed on the upper surface of the free arm when the embroidery device is attached to the sewing machine.

When embroidering with this embroidery device, first attach the embroidery device to the free arm of the sewing machine, attach the work cloth to the opening of the embroidery table, select the stitch pattern, operate the start/stop switch, and drive the machine in the X direction. The embroidery table is moved for each stitch by the mechanism and the Y-direction drive mechanism, and embroidery is applied to the work cloth in cooperation with the vertical movement of the sewing needle of the sewing machine.

[Problem to be solved by the invention]

As mentioned above, when a conventional embroidery device is installed on a sewing machine with a horizontal hook, the needle plate located on the top surface of the free arm section only has a needle insertion hole, and the bobbin thread bobbin is not stored. The throat plate of the main body frame corresponding to the horizontal hook is not provided with a bobbin outlet for attaching and detaching the bobbin thread bobbin. Therefore, the embroidery device must be removed from the sewing machine each time, for example, the bobbin is refilled with bobbin thread. Therefore, there are problems such as requiring extra work to detach and attach the embroidery device, and a large amount of time is wasted in these works.

Furthermore, when the embroidery device is attached to the sewing machine, the needle plate of the main body frame is interposed and it is not possible to check the amount of bobbin thread remaining on the bobbin thread. There are problems such as wearing a kimono.

Therefore, when the embroidery device is attached to the free arm of the sewing machine, it is conceivable to provide a bobbin outlet for attaching and detaching the bobbin thread bobbin in a portion of the throat plate corresponding to the horizontal hook. However, when attaching/detaching the bobbin thread bobbin to/from the horizontal hook or checking the amount of bobbin thread on the bobbin thread bobbin, the embroidery table must be moved in the left/right and front/back directions so that the opening of the embroidery table corresponds to the bobbin outlet. Therefore, there is a problem in that the operability is poor when attaching and detaching the bobbin thread bobbin.

An object of the present invention is to
To provide an embroidery device that can be attached to a sewing machine and allows easy and efficient attachment and detachment of a bobbin thread bobbin to a horizontal hook.

[Means to solve the problem]

An embroidery device that can be attached to a sewing machine according to the present invention includes: an embroidery table having an opening to which a work cloth to be used for embroidery is attached; a main body frame having a needle plate having a needle insertion port;
A drive mechanism that drives the embroidery table in the left-right direction with respect to the main body frame, a drive mechanism that drives the embroidery table in the front-back direction with respect to the main body frame, and a control means that controls the re-drive mechanism, and has a horizontal hook. In an embroidery device that is removably attached to the free arm of a sewing machine, it performs embroidery stitches on processed fabric in cooperation with the vertical movement of the sewing machine's sewing needle.
When the embroidery device is attached to the free arm of the sewing machine, a bobbin outlet for attaching and removing the bobbin thread bobbin to the horizontal hook is provided on the throat plate of the main body frame corresponding to the horizontal hook, and the bobbin thread bobbin is inserted into the horizontal hook. A signal generating means is provided for outputting a bobbin thread bobbin attachment/detachment signal for instructing the attachment/detachment of the embroidery table, and when the bobbin thread bobbin attachment/detachment signal is received from the signal generation means, the embroidery table is moved to a predetermined position where its opening corresponds to the bobbin outlet. A movement control means is provided for controlling the control means to move.

[Effect]

In the embroidery device that can be attached to a sewing machine according to the present invention,
When the embroidery device is attached to the sewing machine, a bobbin outlet is provided in the throat plate of the main body frame to correspond to the horizontal hook of the sewing machine. When the signal generating means outputs the bobbin thread bobbin attachment/detachment signal, the bobbin thread bobbin attachment/detachment signal is supplied to the movement control means, and the movement control means controls the control means to move the embroidery table to a predetermined position. As a result, the opening of the embroidery table corresponds to the bobbin outlet, and the bobbin outlet corresponds to the horizontal hook, so when the embroidery device is attached to the sewing machine, the bobbin thread is passed through the opening and the bobbin outlet to the horizontal hook. The bobbin can be easily attached and detached.

〔Effect of the invention〕

According to the embroidery device that can be attached to a sewing machine according to the present invention, as described above, when the bobbin thread bobbin attachment/detachment signal is output, the opening of the embroidery table corresponds to the bobbin outlet, and the bobbin outlet corresponds to the horizontal hook. Therefore, when replenishing the bobbin thread with bobbin thread, the bobbin thread bobbin can be easily attached to and detached from the horizontal shuttle via the opening and the bobbin outlet without removing the embroidery device from the sewing machine. This eliminates the need for extra work and time when attaching and detaching the bobbin thread bobbin, and the operability of the embroidery device can be greatly improved.

Furthermore, since the remaining amount of bobbin thread on the bobbin thread bobbin can be checked through the opening and the bobbin outlet, it is possible to replenish the bobbin thread before the bobbin thread runs out.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the present invention is applied to an embroidery device that is attached to the free arm of an electronically controlled zigzag sewing machine and applies embroidery to work cloth.

First, an outline of an electronically controlled zigzag sewing machine M to which an embroidery device 1 can be attached will be explained with reference to FIG.

In the arm part 2 of this sewing machine M, a needle bar vertical drive device, a needle bar swing drive device, and a thread take-up drive device are incorporated, and in the free arm part (bed part) 3, upper and lower feed dogs for fabric feeding are installed. a vertical feed drive device for the movement of the feed dog, a back and forth feed drive device for the back and forth movement of the feed dog, and an inner hook 5 that holds the bobbin thread bobbin 4.
A and a horizontal hook 5 consisting of an outer hook 5b are incorporated. These needle bar swing drive device and longitudinal feed drive device are each driven by a pulse motor (not shown), and the needle bar vertical movement device, take-up lever drive device, and vertical feed drive device are driven by a sewing machine motor 6 (
(see FIG. 6). In addition, numeral 7 is a needle bar, numeral 8 is a sewing needle, numeral 9 is a presser bar, numeral 10 is a throat plate, and numeral 1
1 is a sliding plate.

A head 12 provided at the tip of the arm portion 2 is provided with a start/stop switch 13 for controlling starting and stopping of the sewing machine motor 6, and a power switch 15 is provided on the pillar portion 14.
is provided.

As shown in FIG. 3, on the lower surface of the sliding plate 11 corresponding to the position near the shaft hole 4a of the bobbin thread bobbin 4, there is a light emitting diode and a phototransistor, which detects the remaining amount of bobbin thread on the bobbin thread bobbin 4. A detector 86 is fixed thereto, and when the remaining amount of bobbin thread on the bobbin thread bobbin 4 reaches a predetermined amount, the detector 86 outputs a bobbin attachment/detachment signal.

Next, regarding the embroidery device 1 that applies desired embroidery to the work cloth,
This will be explained based on FIGS. 1 to 2 and 4 to 5.

An operating section 17 is provided at the front of the main frame 16, and an embroidery table 1 is provided at the rear of the operating section 17.
A drive unit 19 is provided for moving the device 8 in the left-right direction (hereinafter referred to as the X direction) and the front-back direction (hereinafter referred to as the Y direction).

The operation unit 17 includes a start/stop switch 20 for starting or stopping embroidery sewing, a bobbin attachment/detachment switch 85 for moving the embroidery table 18 to the bobbin attachment/detachment position when attaching/detaching the bobbin thread bobbin 4, and A pattern selection switch 21 consisting of a numeric keypad for selecting an embroidery pattern, a "+" key and a "-" key, a display 22 for displaying the pattern number of the embroidery pattern selected by the pattern selection switch 21, and an embroidery table 18. Leftward movement key 23 to manually move leftward, rightward movement key 2 to manually move rightward
4. A forward movement key 25 for manually moving the camera forward and a backward movement key 26 for manually moving it backward are provided.

The main body frame 16 of the drive unit 19 has a generally rectangular shape in plan view, the earthen wall of the main body frame 16 is composed of a throat plate 27, and the lower wall thereof is composed of a bottom plate 28.

When the embroidery device 1 is attached to the free arm section 3 of the sewing machine M, the needle plate 27 is located on the top surface of the free arm section 3, and the bottom plate 28 is located between the bottom surface of the free arm section 3 and the base 29 of the sewing machine M.
located between. In this state, a needle insertion opening 30 is formed in the throat plate 27 below the sewing needle 8, and a rectangular bobbin outlet 31 is formed corresponding to the sliding plate 11.

A first rack member 32 is disposed in the left-right direction immediately below the rear of the throat plate 27, and a long slit 33 in the left-right direction is formed in the first rack member 32.
A pair of guide bins 34 and 35 extending downward from the lower surface of the needle plate 27 are inserted into the first rack member 32, respectively, and the first rack member 32 is secured to a predetermined height using a retaining fastener 36 attached to each guide bin 34 and 35 from below. It is kept in place. A drive pin 37 for moving the embroidery table 18 in the X direction is erected at the left end of the first rack member 32.

A rack 38 is formed on the rear end surface of the first rack member 32 over a predetermined length from near the right end thereof.
An intermediate gear 40 integrally formed with a pinion 39 and a pinion 39 that mesh with the pinion 39 is rotatably attached to the throat plate 27. Further, a first pulse motor 42 equipped with a drive gear 41 that meshes with an intermediate gear 40 is fixed to an auxiliary frame 43 with screws 44. As a result, when the first pulse motor 42 is driven, the binion 39 is rotated via the drive gear 41 and the intermediate gear 40, and the first rack member 32 is connected to the pair of guide bins 3 that fit into the slit 33.
4.35, it is not guided and is driven in the X direction (left and right direction).

A second rank member 45 is disposed in the front-rear direction immediately below the left side of the throat plate 27, and a long slit 46 in the front-rear direction is formed in this second rack member 45.
A pair of guide bins 35 and 47 extending downward from the lower surface of the throat plate 27 (however, the guide bin 35 is a bin fitted into the slit 33 of the first rack member 32) are respectively inserted into the second rank 6. The member 45 is held at a predetermined height by a retaining fastener 36 attached to each guide bin 35, 47 from below. In order to support the embroidery table 18 and move it in the front-rear direction, the front and rear ends of the second rack member 45 are each provided with a support portion 4 bent inward in a three-shape shape.
8 and 49 are formed, and spacers 50 and 51 with low frictional resistance are attached to these support parts 48 and 49, respectively. Note that the width of the support portion 49 is wider than the width of the support portion 48.

A rack 52 is formed on the left end surface of the second rack member 45 over a predetermined length, and a binion 53 and an intermediate gear 5 integrally formed with the pinion 53 mesh with the rack 52.
4 is rotatably attached to the throat plate 27. Furthermore, a second pulse motor 56 equipped with a drive gear 55 that meshes with the intermediate gear 54 is fixed to the auxiliary frame 57 with screws 58. As a result, when the second pulse motor 56 is driven, the pinion 53 is rotated via the drive gear 55 and the intermediate gear 54, and the second rack member 45 is rotated by the pair of guide bins 35 and 47 that fit into the slit 46. It is not guided and is driven in the Y direction (back and forth direction).

A guide groove 59 extending in the front-back direction is formed in the rear half of the lower surface of the embroidery table near the left end, and guide grooves 60 and 61 are formed in the vicinity of the front and rear ends, respectively. , the embroidery table 18 has its guide groove 59
The upper end of the drive bin 37 is engaged with the upper end of the drive bin 37, the support part 48 is engaged with the guide groove 60 through the spacer 50, and the support part 49 is engaged with the guide groove 61 through the spacer 51, and the throat plate 27. That is, as the first rack member 32 moves in the X direction by the drive of the first pulse motor 42, the drive pin 37 also moves in the It moves in the X direction without being guided by the engaging support parts 48 and 49. Further, as the second rack member 45 moves in the Y direction by the drive of the second pulse motor 56, both the supporting parts 48 and 49 also move in the Y direction, and the embroidery table 1 is connected to its guide groove 59. It is moved in the Y direction without being guided by the matching drive bin 37. Therefore, by driving the first Hals motor 42 and the second pulse motor 56 in combination, the embroidery table 18 is moved so that the right ends of the pair of guide grooves 60 and 61 are brought into contact with the right ends of the pair of support parts 48 and 49, respectively. One side is the distance from the maximum leftward movement position where they touch each other to the maximum rightward movement position where the left ends of the pair of guide grooves 60 and 61 contact the left ends of the pair of support parts 48 and 49, respectively, and the rear end of the guide groove 59 is It can be moved to a desired position within a substantially rectangular movement range whose side is the distance from the maximum forward movement position where it abuts the drive pin 37 to the maximum backward movement position where the front end of the guide groove 59 abuts the drive bin 37. .

A circular opening 62 slightly larger than the movement range of the embroidery table 18 is formed in the front half of the right hand portion of the embroidery table 18 in order to attach the work cloth to the embroidery table 18 and perform embroidery stitching. Here, the size of the opening 62 is sufficiently larger than the size of the bobbin outlet 31. A drive mechanism for driving the embroidery table 18 in the X direction is composed of the first rack member 32, the pinion 39, the intermediate gear 40, the drive gear 41, the first pulse motor 42, the drive pin 37, etc. , Binion 5
3, intermediate gear 54, drive gear 55, second pulse motor 5
6 constitutes a drive mechanism that drives the embroidery table 18 in the X direction.

A free arm insertion opening 64 is formed in the main body frame 16 by a throat plate 27, a bottom plate 28, and a pair of side walls 63.
As shown in FIGS. 4 and 5, the free arm insertion port 64
The free arm portion 3 is inserted into. At this time, the bobbin outlet 31 and the sliding plate 11 are in a corresponding positional relationship. Open the tab, slide plate 11 and attach the bobbin thread bobbin 4 to the horizontal hook 5.
When attaching or removing the bobbin, move the embroidery table 18 so that the bobbin outlet 31 is located approximately at the center of the opening 62, as shown by the three-dot imaginary line in FIG. Since it corresponds to the outlet 31 and the bobbin outlet 31 corresponds to the horizontal hook 5, the embroidery device 1 can be connected to the sewing machine M.
opening 62 and bobbin outlet 31 without removing it from
The bobbin thread bobbin 4 can be easily attached to and detached from the horizontal hook 5 via the hook. Note that this position of the embroidery table 18 is defined as the bobbin attachment/detachment position.

Next, the overall configuration of the control system of the embroidery device 1 will be explained based on the configuration diagram of FIG. 6.

A sewing data generator 70 is connected to the pattern selection switch 21, and the sewing data generator 70 generates X-direction simultaneous feed data and Y-direction feed data for each weaving operation for each of a large number of embroidery patterns that can be sewn. The sewing data generating device 70 generates the X direction simultaneous sending data among the embroidery data corresponding to the pattern number selected by the pattern selection switch 21. The data is supplied to the X-direction movement amount calculation device 71 and the X-direction absolute coordinate memory 79, and the Y-direction simultaneous feed data is supplied to the Y-direction movement amount calculation device 72 and the Y-direction absolute coordinate memory 80.

A timing signal generator 73 is connected to this sewing data generator 70, and generates one pulse signal when the needle bar 7 is at its uppermost position every time the needle bar 7 makes one reciprocating up and down movement. Every time the sewing data is supplied, the sewing data generating device 70 supplies the X direction simultaneous feed data to the X direction movement amount calculation device 71 and the X direction absolute coordinate memory 79, and the Y direction simultaneous feed data to the Y direction movement amount calculation device 72 and the Y direction movement amount calculation device 72. Direction absolute coordinates memory 80 is supplied.

X-direction movement amount calculation device 71 and X-direction absolute coordinate memory 7
9 is connected to an X-direction movement control device 74, and a Y-direction movement control device 75 is connected to the Y-direction movement amount calculating device 72 and the Y-direction absolute coordinate memory 80. The X-direction movement control device 74 supplies X-direction feed data corresponding to the operating time of the leftward movement key 23 or rightward movement key 24 to the X-direction movement amount calculation device 71 and the X-direction absolute coordinate memory 79. The X-direction movement amount calculation device 71 drives the first pulse motor 42 based on the X-direction feed data supplied from the sewing/manufacturing data generation device 70 and the X-direction feed data supplied from the X-direction movement control device 74. This is a device that calculates the number of X-direction drive pulses and the drive direction, and the number of X-direction drive pulses and the drive direction are determined by the X-direction drive control circuit 76.
supply to.

Y direction movement control device! 75 supplies Y-direction simultaneous feed data corresponding to the operating time of the forward movement key 25 or the backward movement key 26 to the X-direction movement amount calculating device 72 and the X-direction absolute coordinate memory 80. The X-direction movement amount calculation device 72 drives the second pulse motor 56 based on the Y-direction simultaneous feed data supplied from the sewing data generator 70 and the Y-direction feed data supplied from the X-direction movement control device 75. It is a device that calculates the number of directional driving pulses and driving direction,
The X-direction drive pulse number signal and the drive direction signal are supplied to the Y-direction drive control circuit 77.

The X-direction absolute coordinate memory 79 is connected to the sewing data generator 70
This is a memory that stores the current X-direction absolute coordinate position of the embroidery table 18 based on the X-direction feed data supplied from the It is supplied to the quantity calculation device 81. Furthermore, when the X-direction absolute coordinate memory 79 receives the initialization signal XINT from the embroidery table initialization device 83, it stores an initial value (for example, a value of "O") as the X-direction absolute coordinate position data. The X-direction bobbin attachment/detachment movement calculation device 81 stores X-direction attachment/detachment position data of the bobbin attachment/detachment position where the opening 62 of the embroidery table 18 corresponds to the bobbin outlet 31, as shown by the three-point imaginary line in FIG. On the other hand, the O from the bobbin attachment/detachment switch 85 and the detector 86
When the bobbin attachment/detachment signal BS is input through the R gate 84, the difference between both data is calculated based on this X-direction attachment/detachment position data and the X-direction absolute coordinate position data of the X-direction absolute coordinate memory 79. Based on the difference, the first pulse motor 4
Determine the number of X-direction drive pulses and drive direction to drive 2,
The X-direction drive pulse number signal and the drive direction signal are supplied to the X-direction drive control circuit 76. At this time, the X-direction absolute coordinate memory 79 is stored in the X-direction bobbin attachment/detachment movement calculation device 81.
The X-direction attachment/detachment position data supplied from the X-direction absolute coordinate position data is stored as X-direction absolute coordinate position data.

The X-direction absolute coordinate memory 80 is connected to the sewing data generator 70.
This is a memory that stores the current Y-direction absolute coordinate position of the embroidery table 18 based on the Y-direction feed data supplied from the X-direction movement control device 75, and the Y-direction absolute coordinate position data is used to move the Y-direction bobbin attachment/detachment. It is supplied to the quantity calculation device 82. Furthermore, when the X-direction absolute coordinate memory 80 receives the initialization signal YINT from the embroidery table initialization device 83, it stores an initial value (for example, a value of "0") as the Y-direction absolute coordinate position data. The Y-direction bobbin attachment/detachment movement amount calculating device 82 stores the Y-direction attachment/detachment position data of the bobbin attachment/detachment position of the embroidery table 18 as shown by the three-point imaginary line in FIG. From 86 to OR gate 84, bobbin attachment/detachment signal BS
is input, this Y direction attachment/detachment position data and
Based on the Y-direction absolute coordinate position data of the direction absolute coordinate memory 80, the difference between both data is determined, and based on this difference, the number of X-direction driving pulses and the driving direction for driving the second pulse motor 56 are determined. A drive pulse number signal and a drive direction signal are supplied to the Y-direction drive control circuit 77. At this time, X
The direction absolute coordinate memory 80 stores the Y-direction attachment/detachment position data supplied from the Y-direction bobbin attachment/detachment movement amount calculating device 82 as Y-direction absolute coordinate position data.

As a result, the X-direction drive control circuit 76 controls the first pulse motor 42 based on the X-direction drive pulse number signal and the drive direction signal.
The Y-direction drive control circuit 77 also controls the second pulse motor 56 based on the X-direction drive pulse number signal and the drive direction signal. As a result, the embroidery table 18 is moved to any position within the movement range.

An embroidery table initialization device 83 that moves the embroidery table 18 to the initial position is connected to the power switch 15, and when the power switch 15 is turned on and an ON signal is output, the embroidery table is moved to the maximum right in one day. The X-direction drive control circuit 76 is supplied with an X-direction drive pulse signal sufficient to move the device to the desired position, and the X-direction absolute coordinate memory 79
While supplying the initialization signal XINT to the embroidery table 1
8 to the maximum backward movement position is supplied to the Y-direction drive control circuit 77, and an initialization signal YTNT is supplied to the X-direction absolute coordinate memory 80.

A motor control circuit 78 is connected to the start/stop switch 20, and based on an ON signal supplied from the switch 20, the sewing machine motor 6 is driven at a predetermined sewing speed.

In addition, each device 70 to 75, 78, 81 to 83 and each circuit 76
・77 and the first pulse motor 42 and the second pulse motor 5
Power for driving each of the sewing machines 6 and 6 is supplied from the sewing machine M through connection lines not shown.

Further, this control device may be configured with a microcomputer including a CPU, ROM, RAM, and the like. Also,
The sewing machine M is provided with a detection switch (path shown) that detects whether the embroidery device 1 is attached, and when the embroidery device 1 is attached to the sewing machine M and a detection signal is output from the detection switch, the control device of the sewing machine M is , the pulse motor of the needle bar swing drive device is controlled not to be driven, and the pulse motor of the back and forth feed drive device is also controlled not to be driven.

When embroidering with the embroidery device 1 configured as described above, first attach the embroidery device 1 to the sewing machine M, and then attach the embroidery device 1 to the sewing machine M.
After processing and setting the cloth in step 2, the power switch 15 is turned on. As a result, the embroidery table initialization device 83 supplies the X-direction drive pulse signal to the X-direction drive control circuit 76 and also supplies the Y-direction drive pulse signal to the Y-direction drive control circuit 77, and at the same time, The memory 79 is supplied with an initialization signal XINT, and the X-direction absolute coordinate memory 80 is also supplied with an initialization signal YINT. the result,
The first pulse motor 42 is driven under the control of the X-direction drive control circuit 76 to move the embroidery table 18 to its maximum rightward movement position, and the second pulse motor 56 is driven under the control of the Y-direction drive control circuit 77. The embroidery table 18 is then moved to its maximum backward movement position. That is, the embroidery table 18 is moved to the initial position. At this time, as the embroidery table 18 moves to the initial position, the X-direction absolute coordinate memory 79 stores the initial value in response to the initialization signal XINT, and the X-direction absolute coordinate memory 80 stores the initial value in response to the initialization signal YI.
The initial value is stored by NT.

Next, operate each movement key 23 to 26 to move the embroidery table 1
8 to the starting position of the embroidery.

After operating the pattern selection switch 21 to select a desired embroidery pattern, the start/stop switch 20 is operated. As a result, the sewing machine motor 6 rotates, and a timing signal is supplied from the timing signal generator 73 to the sewing data generating device 70 in synchronization with the vertical reciprocating movement of the needle bar 7 .

The sewing data generator 70 supplies X-direction feed data to the X-direction movement amount calculation device 71 and supplies Y-direction simultaneous feed data to the Y-direction movement amount calculation device 72 every time a timing signal is supplied. The X-direction drive control circuit 76 controls the first pulse motor 42 based on the X-direction drive pulse number signal and drive direction signal calculated and determined by the X-direction movement amount calculation device 71.
The Y-direction drive control circuit 77 drives the second pulse motor 56 based on the Y-direction drive pulse number signal and drive direction signal calculated and determined by the Y-direction movement amount calculating device 72.

As a result, the embroidery table 18 is sequentially moved to the sewing position, and the selected embroidery pattern is formed on the work cloth in cooperation with the vertical movement of the sewing needle 8.

At the same time, as the embroidery table 18 moves, the X direction absolute coordinate memory 79 receives the
The X-direction absolute coordinate position data is updated every time the direction feed data is output, and the X-direction absolute coordinate memory 80 updates the Y-direction absolute coordinate position data every time the Y-direction feed data is output from the sewing data generator 70. do.

When the work cloth is removed from the opening 62 upon completion of embroidery stitching, the bobbin attachment/detachment switch 85 is operated to remove the bobbin thread bobbin 4. As a result, the bobbin attachment/detachment signal BS output from the bobbin attachment/detachment switch 85 is passed through the OR gate 84 to the X-direction bobbin attachment/detachment movement calculation device 8.
1 and the X-direction bobbin attachment/detachment calculation device 82.

The X-direction bobbin attachment/detachment movement amount calculation device 81 calculates the X-direction movement amount corresponding to the movement of the embroidery table to the bobbin attachment/detachment position for one day based on the X-direction attachment/detachment position data and the X-direction absolute coordinate data of the X-direction absolute coordinate memory 79. A drive pulse number signal and a drive direction signal are supplied to the X-direction drive control circuit 76. On the other hand, Y
The directional movement amount calculating device 72 calculates the Y direction attachment/detachment position data and the Y direction movement amount calculation device 72.
Based on the Y-direction absolute coordinate data in the direction absolute coordinate memory 80, a Y-direction drive pulse number signal and a drive direction signal corresponding to the movement of the embroidery table 18 to the bobbin attachment/detachment position are supplied to the Y-direction drive control circuit 77. As a result, the embroidery table 18 moves to the bobbin attachment/detachment position shown by the three-dot imaginary line in FIG. 2, and the opening 62 corresponds to the bobbin outlet 31. That is,
Since the opening 62 corresponds to the bobbin outlet 31 and the bobbin outlet 31 corresponds to the horizontal hook 5 via the sliding plate 11,
The bobbin thread bobbin 4 can be easily attached and detached from the horizontal hook 5 through the opening 62 and the bobbin outlet 31.

Furthermore, the remaining amount of bobbin thread on the bobbin thread bobbin 4 reaches a predetermined amount, and the detector 8
When the bobbin attachment/detachment signal BS is output from 6, the embroidery table 18 is moved to the bobbin attachment/detachment position in the same manner as described above.

As explained above, when the embroidery device 1 is attached to the sewing machine M, the needle plate 27 of the main body frame 16 corresponding to the horizontal hook 5 is
A bobbin outlet 31 is formed in the bobbin attachment/detachment switch 8.
Since the embroidery table 18 is moved to the bobbin attachment/detachment position when the bobbin attachment/detachment signal BS is output from the bobbin attachment/detachment signal BS from the sensor 5 or the detector 86, the opening 62 corresponds to the bobbin outlet 31, and the bobbin outlet 31 corresponds to the slide plate 11. Horizontal pot through 5
Correspondingly, the bobbin thread bobbin 4 can be easily attached to and detached from the horizontal hook 5 through the opening 62 and the bobbin outlet 31, and there is no need to remove the embroidery device 1 from the sewing machine M each time. Therefore, no extra work or time is required when attaching and detaching the bobbin thread bobbin 4, and the operability of the embroidery device 1 can be greatly improved.

Furthermore, since the remaining amount of bobbin thread in the bobbin thread bobbin 4 can be confirmed through the opening 62 and the bobbin outlet 31, the bobbin thread can be replenished before the bobbin thread in the bobbin thread bobbin 4 runs out.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an exploded perspective view of an embroidery device that can be attached to an electronically controlled zigzag sewing machine;
Fig. 2 is a plan view of the embroidery device, Fig. 3 is a partial vertical sectional side view of the free arm section equipped with a horizontal hook, and Fig. 4 is Fig. 2 IV-
5 is a sectional side view taken along the line TV, FIG. 5 is a sectional front view taken along the line V--V in FIG. 2, and FIG. 6 is a configuration diagram of the control system of the embroidery device. M... Sewing machine, ■... Embroidery device, 3... Free arm section, 4... Lower thread bobbin, 5... Horizontal hook, 8...
・Sewing needle, 16. Main body frame, 18. Embroidery table, 23-26. Movement key 27. Throat plate, 31.
・Bobbin outlet, 32...1st rack member, 34.3
5, 47... Guide pin, 37... Drive bin, 38
・52...Rack, 39.53...Pinion,
40, 54... Intermediate gear, 41, 55... Drive gear,
42...First pulse motor, 45...Second rack member, 56...Second pulse motor, 59-61...
Guide groove, 62... Opening, 70... Sewing data generator, 71... X-direction movement amount calculation device, 72...
Y-direction movement amount calculation device, 76...X-direction drive control device,
77...Y direction drive control device, 79...X direction absolute coordinate memory, 80...Y direction absolute coordinate memory, 81...
- Movement amount calculation device for X-direction bobbin attachment/detachment, 82... Movement amount calculation device for Y-direction bobbin attachment/detachment, 85... Bobbin attachment/detachment switch, 86... Detector. Patent applicant Brother Industries, Ltd.

Claims (1)

[Claims] (1) An embroidery table having an opening into which a work cloth to be used for embroidery is attached, a main body frame equipped with a throat plate having a needle insertion port, and a drive for driving the embroidery table in the left-right direction with respect to the main body frame. a mechanism, a drive mechanism that drives the embroidery table in the front-rear direction with respect to the main body frame;
A control means for controlling both of the drive mechanisms is provided, and the embroidery is detachably attached to the free arm of a sewing machine having a horizontal hook, and performs embroidery stitches on the work cloth in cooperation with the vertical movement of a sewing needle of the sewing machine. In the apparatus, a bobbin outlet for attaching and removing a bobbin thread bobbin to and from the horizontal hook is provided in a throat plate portion of the main body frame corresponding to the horizontal hook when the embroidery device is attached to the free arm of the sewing machine; Signal generating means is provided for outputting a bobbin thread bobbin attachment/detachment signal for instructing attachment/detachment of the bobbin thread bobbin to/from the horizontal hook, and when the bobbin thread bobbin attachment/detachment signal is received from the signal generating means, the embroidery table is connected to the opening of the bobbin thread bobbin. An embroidery device that can be attached to a sewing machine, further comprising a movement control means for controlling the control means to move the embroidery device to a predetermined position corresponding to the bobbin outlet.