JPH03210296A - Automatic embroidery sewing supplementing device in sewing machine - Google Patents

Abstract

PURPOSE:To increase the number of embroidery motives by setting a mounting position for a carriage on which an embroidery frame is fixed in such a way that it can be moved freely, and setting the designation position of the embroidery frame standing by before embroidery differently in a first stroke from that in a second stroke in a supplementing sewing operation. CONSTITUTION:The embroidery frame 21 is slided to the terminal part of the carriage in a direction of X via the elongated groove 36 of an outer frame 21'' and a pattern selection operating part is operated after tightening the frame with a screw 23, at the final position of an elongated groove circle, then, the motive of a character is selected appropriately. For example, when alphabetic characters K, O, B, A, Y, and A housed in width L of nearly 85mm of the first stroke are selected sequentially and are stored in a second storage part, the embroidery frame 21 is moved so as to conform a needle to a first designation point P1 in the embroidery frame 21, and when a sewing machine is operated, it is operated in sequence of a pattern from the first designation point P1 in accordance with the control data of each stored pattern, and the embroidery stroke of the first stroke is performed, then, each motive is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic embroidery pattern adding device in a sewing machine.

(Prior art) The automatic embroidery sewing device in a conventional sewing machine applies embroidery to cloth stretched over the embroidery frame by automatically driving the embroidery frame. In contrast to a sewing machine that can perform normal sewing using a bed machine frame, in a compound sewing machine that enables automatic embroidery sewing using an embroidery frame, the drive range of the embroidery frame in the X direction and the Y direction perpendicular to it is more narrowly limited. For example, if the size of the pattern to be embroidered was 15 s+m, the number of pattern combinations would be limited to 6.

(Problems to be Solved by the Invention) The present invention enables embroidery with a combination sewing machine that combines a sewing machine capable of normal sewing and an embroidery sewing machine capable of automatic embroidery sewing using an embroidery frame into one sewing machine frame. This is an attempt to make it possible to sew a greater number of combinations of motifs than with conventional methods.

(Means for Solving the Problems) The present invention provides a sewing machine that is capable of normal sewing using a JIS standard bed machine frame or a bed of a similar size, and an embroidery machine that is capable of automatic embroidery using an embroidery frame. By making the mounting position of the embroidery frame slidable when performing embroidery sewing on a compound sewing machine equipped with a embroidery machine, and by operating the additional sewing operation button, the embroidery start position can be moved to a position different from that during the first step. By combining the embroidery in the first step (L+) and the embroidery in the second step (L,), the length in the X direction is expanded to approximately 125+m, thereby increasing the number of motif combinations.

(Function) The present invention attempts to increase the number of embroidery motifs that can be sewn by a sewing machine capable of normal stitching and embroidery stitching, which is configured with a bed machine frame based on or in accordance with JIS standards, by using an additional embroidery device. The sewing machine has a drive shaft that is rotatably supported on the frame of the sewing machine main body, a needle bar that moves up and down in conjunction with the rotation of the drive shaft, and has a needle attached to its lower end.
a thread ring catcher that is linked to the rotation of the drive shaft and cooperates with the vertical movement of the needle; a needle bar support that holds the needle bar and is supported so as to be capable of oscillating movement; A first stepping motor connected via a rod to swing, a feeding stepping motor that controls and drives the feed amount of the feed dog supported by the horizontal feed shaft, and a memory that stores control data for pattern patterns such as letters. a pattern pattern selection device that selects control data for a desired pattern pattern from the storage device; an X-direction drive mechanism that is supported by the base machine frame and drives the carriage in the X direction; an embroidery frame drive mechanism including a Y-direction drive mechanism that drives in the Y-direction; and an embroidery frame drive mechanism that transmits the rotational movement of the first stepping motor to the needle bar support to connect the needle bar, the thread ring catcher, and the feed dog. The embroidery frame drive mechanism transmits the normal stitching that can perform zigzag and the rotational movement of the first stepping motor to the X-direction drive mechanism of the embroidery frame drive mechanism, thereby cooperating with the movement of the Y-direction drive mechanism by the Y-direction drive stepping motor. a sewing mode selection means for selecting one of embroidery stitching by the action of the sewing machine; and one of transmitting the rotation of the first stepping motor to the needle bar support and transmitting the rotation of the embroidery frame drive mechanism to the X-direction drive mechanism. a switching device for switching to the embroidery frame drive mechanism; and an embroidery addition operation unit that automatically returns the embroidery frame to a designated point for additional embroidery, the embroidery addition operation section having a return amount that is made to match the amount of sliding of the embroidery frame through the outer frame groove, After completion of the embroidery stitch selected by the selection means, additional embroidery is automatically performed following the embroidery of the embroidery stitch by the groove sliding of the embroidery frame and selection of the embroidery addition operation section. It is characterized by the following.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a main machine frame in which an arm and a bed are integrated, and 2 a front cover that covers the front opening of the main machine frame l. 3 is a base machine frame, which is connected to the lower end of the main machine frame 1.

Reference numeral 4 denotes a drive shaft, which is rotatably supported by the main frame 1, and a needle bar 5 is connected to the front end via a crank so as to be vertically movable, and the needle bar is swingably supported by the main machine frame 1. A needle 7 is attached to the lower end of the needle bar support 6. 8
A presser bar is supported by the main machine frame l so as to be slidable in the vertical direction, and a cloth presser 9 is attached to the lower end.

The drive shaft 4 is rotatably connected by a belt to a drive motor lO provided within the main machine frame l, and further includes a lower shaft l! which is rotatably supported by the main machine frame l! are connected via a timing belt.

The lower shaft drives a thread wheel catcher 2 that cooperates with the needle 7, and also drives a feed device including a feed dog 13 mounted on a horizontal feed shaft swingably supported on the machine frame of the sewing machine main body. Then feed the fabric to form a continuous lock stitch.

14 is a pattern stitch selection operation section, I5 is a normal stitch selection operation section, 16 is an embroidery stitch selection operation section, 17 is an additional line selection operation section, and 18 is a display section on which the selected pattern, etc. is displayed.

An amplitude control motor (not shown) and a feed control motor 19 are provided within the main machine frame l, and when the normal sewing operation section 15 is operated and the normal sewing mode is selected, the information is stored in a storage device to be described later. The amplitude control motor and the feed control motor 9 are driven based on the control data, and the amplitude control motor causes the needle bar support 6 to swing via the swing arm and the amplitude rod 20, and the feed control motor controls the movement of the horizontal feed axis to control the movement of the feed dog I3 to perform needle bar amplitude control and feed dog control for pattern sewing.

Reference numeral 21 denotes an embroidery frame, which is detachably attached to a carriage end 23 projecting to the outside from an embroidery frame drive mechanism 22 provided in the base machine frame 3, and is secured with a tightening screw 23'.

The embroidery frame drive mechanism 22 is constructed as follows.

Reference numeral 24 denotes an X-direction drive shaft, and a guide shaft 25 parallel to the X-direction drive shaft is provided. Both shafts 24 and 25 are rotatably supported by the base machine frame 3, and are attached to the ends of both shafts. Lead grooves 27 and 27 are formed on the outer circumferences of both shafts 24 and 25.

A carriage guide 28 straddles both shafts 24 and 25, and pins (not shown) provided at both ends of the carriage guide are engaged with the leads il$27.27, respectively, so that both sleeves 24 and 25 are The rotation causes the carriage guide 28 to move along the axial direction of both shafts 24 and 25, that is, in the X direction.

Reference numeral 29 denotes a Y-direction drive shaft, and a Y-direction carriage belt 30 is hung on both ends of the Y-direction drive shaft, and a guide rod 31 supported by the base machine frame 3 is slidably slidable in the axial direction between the two belts. A guide plate 32 straddles the belt, and both ends of the guide plate are fixed to the belt 30 by belt holders 33, respectively.

A carriage 34 that engages with the Y direction carriage belt 3° movable in the Y direction and the carriage guide 28 movable in the The carriage end portion 23 is formed, and the embroidery frame 21 is attached to the end portion.

The embroidery frame consists of an inner frame 21' and an outer frame 2-bi, and the cloth is sandwiched between the inner frame and the outer frame and tightened with an adjustment screw 35. Outer frame 2
A long groove 36 substantially parallel to the longitudinal direction of the X-direction drive shaft 24 when the embroidery frame is attached to the carriage end 23 is shown in FIG.
is formed.

Reference numerals 23' and 23' designate mounting screws that pass through the long grooves 36 of the outer frame, are loosened when the embroidery frame 21 is slid into the groove, and are fixed to the carriage end 23 when in use.

Next, the block diagram shown in FIG. 3 will be explained.

KB is a means of selecting patterns! 4. PM is a sewing mode selection means consisting of a normal sewing key 15 and an embroidery sewing key 16, and SU is an embroidery addition key! 7. ME is a memory sewing mode setting means,
These are connected to a central processing unit CPU. A stepping motor drive device SMC and a speed control device MC are connected to the central processing unit, internal storage devices ROM and RAM are also connected, and an external storage device FDD is connected to an input/output device I.
10.

A stepping motor SMX for controlling the amplitude of the needle and the X-axis of the embroidery frame, a stepping motor SMF for controlling the amount of cloth feed, and a stepping motor SMY for controlling the Y-axis of the embroidery frame are connected to the stepping motor drive device SMC, A sewing mode determining device DI is connected to each motor via an optical sensor, and the sewing mode determining device DI is connected to the central processing unit CPU.

Further, the speed control device ZMC is connected so that input is input from the speed setting device C and output to the electric motor M.
is connected to the speed control device MC via a speed detection device S equipped with an optical sensor, and the number of rotations is fed back.

Since the device of the present invention has the above-described structure, when the embroidery sewing operation section 16 is operated and the embroidery sewing mode is selected, the amplitude stepping motor SMX is moved to the needle bar support by control data from the storage device (ROM). Amplitude rod 20 to be connected
is rotated to a non-swiveling position to fix the amplitude rod 20, and at the same time, the embroidery frame 2! The X-direction of the embroidery frame is switched to a controllable state, the feed dog 13 is made to sink below the throat plate surface so as to be unnecessary for embroidery work, and the Y-feed stepping motor SMY of the embroidery frame is put into a driving mode.

The embroidery frame 21 is slid to the end of the carriage end 23 in the X direction (+ direction in FIG. 4) through the long groove 36 of the outer frame 2, and the screw 23 is screwed at the end position in the long groove. After tightening with ', operate the pattern selection operation section 14 to select a motif such as letters as appropriate. For example, to fit within the width (L+) of approximately 851 in the first process (first embroidery process), 0. B,
By sequentially selecting the alphabets A, Y, and A and storing them in the second storage unit (RAM), the embroidery frame 21 will move so that the first specified point P in the embroidery frame 21 is aligned with the needle 7. , Next, when the sewing machine is operated, each pattern (for example, K, 0, B, A, Y, A
) is moved in accordance with the order of the pattern, the first embroidery process is performed, and each motif is completed (FIG. 4).

Furthermore, if you wish to add several other motifs consecutively to the embroidery motif sewn in the first step, loosen the mounting screws 23' and 23' and attach the embroidery frame 21 to the carriage end 2.
3, slide it along the long groove 36 in one direction in the X direction shown in FIG. If you operate the pattern selection operation section 14 and select an additional character pattern, for example, select each of the alphabets S, H, and I in sequence and store them in the second storage device (RAM), it will already be stored in the storage device (ROM). ) The embroidery frame 21 is moved relative to the needle 7 based on the additional stitch control data stored in the needle 7.
points to the second designated point P, and enters a standby state for additional embroidery.

Return amount L by which the embroidery frame 21 is automatically returned for additional embroidery
Yo is the same distance as the scale by which the embroidery frame 21 is moved by sliding it in the long groove 36.

Next, when the sewing machine is operated, the second embroidery process is performed according to the control data of each of the stored character patterns (S, H, I), and an additional character pattern is embroidered (see Fig. 5). and range).

FIG. 6 is an explanatory diagram of the embroidery sewing operation.

(Effects) Since the device of the present invention has the structure and function as described above, it is possible to embroidery even though the driving range of the embroidery drive mechanism is limited in a sewing machine using a JIS standard or a bed machine frame conforming thereto. The mounting position can be moved with respect to the carriage that fixes the frame, and the specified position of the embroidery frame that waits before embroidery by operating the additional sewing operation section can be set in the first stroke or the second stroke. By varying the number of embroidery motifs, it is possible to increase the number of embroidery motifs, which was not possible with conventional models, and this has a great practical effect.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a perspective view of a sewing machine equipped with the device of the present invention, FIG. 2 is a perspective view showing a part of the inside of the sewing machine equipped with the device of the present invention, and FIG. 4 is a plan view showing the embroidery frame in the first stroke of the device of the present invention; FIG. 5 is a plan view showing the embroidery frame in the second stroke of the device of the present invention; FIG. Figure 6 is an explanatory diagram of the operation of the device of the present invention, in which 1 is the main machine frame, 4 is the drive shaft, 5 is the needle bar,
6 is a needle bar support, 12 is a thread wheel catcher, 19 is a feeding stepping motor, I4 is a pattern selection device, 15.
16 is a sewing mode selection means; 17 is an embroidery addition operation section; 2
1 is an embroidery frame, and 22 is an embroidery frame drive mechanism.

Claims (1)

[Claims] A drive shaft rotatably supported by the machine frame of the sewing machine, a needle bar that moves up and down in conjunction with the rotation of the drive shaft and has a needle attached to its lower end; a thread ring catcher that cooperates with the vertical movement; a needle bar support that holds the needle bar and is supported so as to be able to make an oscillating motion; 1 stepping motor, a feeding stepping motor that controls and drives the feed amount of the feed dog supported by the horizontal feed shaft, a storage device that stores control data for pattern patterns such as characters, and a desired pattern pattern from the storage device. a pattern selection device that selects control data for the pattern, an X-direction drive mechanism that is supported by the base machine frame and drives the carriage in the X direction, and a Y-direction drive mechanism that drives the carriage in the Y direction perpendicular to the X direction. an embroidery frame driving mechanism; a normal stitch that transmits the rotational movement of the first stepping motor to the needle bar support member, and allows zigzag stitching by cooperation of the needle bar, the thread ring catcher, and the feed dog; A sewing mode in which the rotational movement of the first stepping motor is transmitted to the X-direction drive mechanism of the embroidery frame drive mechanism, and embroidery stitching is selected in cooperation with the movement of the Y-direction drive mechanism by the Y-direction drive stepping motor. a selection means; a switching device for switching the rotation of the first stepping motor to either the transmission to the needle bar support or the transmission to the X-direction drive mechanism of the embroidery frame drive mechanism; an inner frame and an outer frame; an embroidery frame that is removably supported so as to be movable relative to the carriage of the embroidery frame drive mechanism via a groove formed in the outer frame and extending in the X direction; and the outer frame of the embroidery frame. an embroidery addition operation section that automatically returns the embroidery frame to a specified point for additional embroidery, having a return amount that is made to match the amount of sliding by the groove, and an embroidery sewing stroke selected for embroidery stitching by the sewing mode selection means; After completion of the embroidery process, additional embroidery is automatically performed following the embroidery in the embroidery process by sliding the groove of the embroidery frame and selecting the embroidery addition operation section. Sewing addition device.