JP2748171B2 - Automatic embroidery sewing device in sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic embroidery sewing apparatus in a sewing machine.

(Prior art) A conventional automatic embroidery sewing device in a sewing machine automatically embroiders a cloth stretched on an embroidery frame by automatically driving the embroidery frame. In particular, a bed machine frame of JIS standard or a size similar thereto is used. In a sewing machine that enables automatic embroidery sewing using an embroidery frame in a sewing machine that can perform normal sewing using a bed machine frame, the driving range in the X direction of the embroidery frame and in the Y direction perpendicular thereto is narrower and limited. since it will for example X direction has fallen generally 85mmL number of combinations of size is 15mm Datosuruto own pattern so suppressed is embroidered pattern about ₁ is kept to 6箇.

(Problems to be Solved by the Invention) According to the present invention, a sewing machine capable of performing normal sewing and an embroidery sewing machine capable of performing automatic embroidery sewing using an embroidery frame can be embroidered with a combined sewing machine that is described in a single sewing machine frame. The purpose is to make it possible to sew more motif combinations than conventional ones.

(Means for Solving the Problems) The present invention relates to an embroidery sewing machine which enables normal embroidery using a JIS standard bed machine frame or a bed of a similar size, and an automatic embroidery machine using an embroidery frame. The embroidery sewing performed by the combined sewing machine provided with the embroidery machine can be slid in the mounting position of the embroidery frame, and the embroidery start position can be moved to another position different from that in the first stroke by operating the additional sewing operation button. By combining the embroidery (L ₁ ) of the first step and the embroidery (L ₂ ) of the second step, the length in the X direction is increased to approximately 125 mm, thereby increasing the number of motif combinations.

(Function) The present invention seeks to increase the number of embroidery sewing motifs to be sewn by a sewing machine capable of normal sewing and embroidery sewing formed by a bed machine frame based on or conforming to the JIS standard using an additional embroidery device. A drive shaft rotatably supported by the machine frame of the sewing machine, a needle bar having a needle attached to a lower end thereof, which is vertically moved in conjunction with the rotation of the drive shaft, and
A thread wheel catching section which is interlocked with the vertical movement of the needle in conjunction with the rotation of the drive shaft, a needle bar support which holds the needle bar and is supported so as to be capable of amplitude movement; A first stepping motor connected and oscillated via a rod, a feed stepping motor for controlling and driving a feed amount of a feed dog supported on a horizontal feed shaft, and a storage for storing control data of a pattern pattern such as a character; A pattern pattern selecting device for selecting control data of a desired pattern pattern from the storage device; an X-direction driving mechanism supported by the base machine frame for driving the carriage in the X direction; and a carriage perpendicular to the X direction. An embroidery frame driving mechanism that is a Y-direction driving mechanism that drives in the Y-direction; and transmits the rotational movement of the first stepping motor to the needle bar support to transmit the rotation of the needle bar, the thread wheel catcher, and the feed dog. No cooperative Embroidery sewing in cooperation with the normal sewing capable of zigzag and the rotational movement of the first stepping motor to the X-direction drive mechanism of the embroidery frame drive mechanism, and the movement of the Y-direction drive mechanism by the Y-direction drive stepping motor. And a switching device for switching the rotation of the first stepping motor between transmission to the needle bar support and transmission of the embroidery frame driving mechanism to the X-direction driving mechanism. An embroidery frame, which is composed of an inner frame and an outer frame, and is detachably supported so as to be movable with respect to the carriage of the embroidery frame driving mechanism via a groove formed in the outer frame and extending in the X direction. An embroidery adding operation unit having an amount of return adjusted to the amount of sliding of the embroidery frame by the outer frame groove and automatically returning the embroidery frame to a designated point of additional embroidery. After the selected embroidery sewing process of the embroidery sewing is completed, the additional embroidery is automatically performed continuously with the embroidery of the embroidery sewing process by sliding the groove of the embroidery frame and selecting the embroidery adding operation unit. It is characterized by having done.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a main body frame in which an arm and a bed are integrated, and 2 denotes a front cover that covers a front opening of the main body frame 1. And 3
Is a base machine frame 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 body frame 1 and has a front end to which a needle bar 5 is connected via a crank so as to be vertically movable. The needle bar is supported by the main body frame 1 so as to be swingable. The needle 7 is attached to the lower end supported by the needle bar support 6.
Reference numeral 8 denotes a presser bar, which is supported by the main body frame 1 so as to be slidable in the vertical direction, and a cloth presser 9 is mounted at a lower end thereof.

The drive shaft 4 is rotatably connected to a drive motor 10 provided in the main body frame 1 by a belt, and further connected to a lower shaft 11 rotatably supported by the main body frame 1 via a timing belt. ing.

The lower shaft drives a thread catcher 12 cooperating with the needle 7 and also drives a feeder including a feed dog 13 mounted on a horizontal feed shaft that is swingably supported by the machine frame of the sewing machine. The cloth is fed to form continuous lock stitches.

Reference numeral 14 denotes a pattern sewing selection operation unit, 15 denotes normal sewing, 16 denotes embroidery sewing, 17 denotes additional sewing selection operation units, and 18 denotes a display unit on which a selected pattern pattern or the like is displayed.

An amplitude control motor (not shown) is provided in the main body frame 1.
And a feed control motor 19 are provided.
15 and the normal sewing mode is selected, the amplitude control motor and the feed control motor 19 are driven based on control data stored in a storage device described later, and the amplitude control motor is a swing arm and an amplitude rod 20. The needle bar support 6 is swung through the feed control motor. The feed control motor controls the movement of the horizontal feed shaft to control the movement of the feed dog 13, thereby controlling the needle bar amplitude control and the feed dog control for pattern sewing. Make

Reference numeral 21 denotes an embroidery frame, which is removably mounted on a carriage end 23 which is protruded outside from an embroidery frame drive mechanism 22 provided in the base machine frame 3 and is fixed by a tightening screw 23 '.

 The embroidery frame drive mechanism 22 is configured 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 ends of both shafts. Belt 26 that is hung on the pulley that has been
Lead grooves 27, 27 are formed on the outer periphery of 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 lead grooves 27, 27, respectively.
The rotation of 5 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. 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 slidable between the two belts. A guide plate 32 is straddled, and both end portions of the guide plate are fixed to the belt 30 by belt retainers 33, respectively.

The carriage 34, which engages with the Y-direction carriage belt 30 movable in the Y direction and the carriage guide 28 movable in the X direction, and interlocks with the movement of the carriage guide and the belt 30 respectively, has the carriage at its end. An end 23 is formed, and the embroidery frame 21 is mounted on the end.

The embroidery frame comprises an inner frame 21 'and an outer frame 21 ", and a cloth is sandwiched between the inner frame and the outer frame and tightened with an adjusting screw 35. The outer frame 21"
A long groove 36 substantially parallel to the longitudinal direction of the X-direction drive shaft 24 in a state where the embroidery frame is attached to the carriage end 23 is formed in the embroidery frame.

Reference numerals 23 'and 23' denote mounting screws which are passed through the long groove 36 of the outer frame and loosen the embroidery frame 21 when sliding the groove and fix the embroidery frame 21 to the carriage end 23 when using the embroidery frame 21.

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

KB is a pattern selection means 14, PM is a sewing mode selection means including a normal sewing key 15 and an embroidery sewing key 16, and SU is an embroidery addition key 1.
7. ME is a memory sewing mode setting means, which are connected to the central processing unit CPU. The central processing unit is connected to a stepping motor driving device SMC and a speed control device MC, further connected to an internal storage device ROM and RAM, and connected to an external storage device FDD via an input / output device I / O. .

The stepping motor driving device SMC includes 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 feed amount of the cloth, and a Y for the embroidery frame.
An axis control stepping motor SMY is connected, and a sewing mode determination device D1 is connected to each motor via an optical sensor, and the sewing mode determination device D1 is connected to the central processing unit CPU.

The speed control device ZMC is connected so that an input from the speed setting device C is input and output to the electric motor M.
Is connected to the speed control device MC via a speed detection device S having an optical sensor, and the number of revolutions 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 the control data from the storage device (ROM). The connected amplitude rod 20 is rotated to a position where it cannot swing, thereby fixing the amplitude rod 20 and switching its rotation to a state where the X direction of the embroidery frame 21 can be controlled, and embroidering the feed dog 13. In order to make the embroidery frame unnecessary, it is lowered below the needle plate surface, and the Y-feed stepping motor SMY of the embroidery frame is driven.

The embroidery frame 21 has an outer frame 21 ″ with respect to the carriage end 23.
Through the long groove 36 to the end in the X direction (+ direction in FIG. 4), tighten the screw 23 'at the end position in the long groove, and operate the pattern selection operation section 14 as appropriate. Select a motif such as a character. For example, alphabets of K, O, B, A, Y and A which fall within a width (L ₁ ) of approximately 85 mm of the first process (first embroidery process) are sequentially selected and stored in the second storage unit (RAM). the embroidery frame 21 if it is the needle 7 to be as mobile allowed to match the first designated point P ₁ in the embroidery frame 21, then each pattern patterns stored from the first designated point P ₁ when the operating the sewing machine ( For example, K, O,
In accordance with the control data (B, A, Y, A), the patterns are moved in the order of the pattern, and the embroidery process of the first process is performed to complete each motif (FIG. 4).

Further, when it is desired to add several other motifs in succession to the embroidery sewing motif sewn in the first step, loosen the mounting screws 23 ′ and 23 ′ to move the embroidery frame 21 to the carriage end 23. Slide along the long groove 36 in one direction of the X direction shown in FIG.
3 'and 23' are fixed, and then the additional key 17 of the sewing machine is operated to operate the pattern selection operation section 14 to select an additional character pattern. For example, each alphabet of S, H and I is sequentially selected and stored in the second memory. If it is stored in the device (RAM), it is already a storage device (ROM)
The embroidery frame 21 is set on the needle 7 based on the additional sewing control data stored in the
Needle 7 is moved to become a standby state of the additional embroidery refers to the second designated point P _2.

The embroidery frame 21 is automatically returned for additional embroidery return amount L ₂
Is the amount L ₂ of the same distance moved by sliding the middle longitudinal groove 36 the embroidery frame 21.

Next, when the sewing machine is operated, the embroidery process of the second process is performed according to the stored control data of each character pattern (S, H, I), and an additional character pattern is embroidered (see FIG. 5). range of L _2).

 FIG. 6 is a diagram for explaining the operation of embroidery sewing.

(Effect) Since the apparatus of the present invention has the above-described structure and operation, the embroidery frame is limited in the sewing machine using the bed machine frame conforming to the JIS standard or the like, even though the drive range of the embroidery drive mechanism is limited. The attachment position can be moved with respect to the carriage to which the embroidery is fixed, and the designated position of the embroidery frame waiting before embroidery by the operation of the additional stitching operation unit is in the first stroke and the second stroke. By making them different, it is possible to increase the number of embroidery motifs, which was impossible with the conventional model, and it is practically effective.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a perspective view of a sewing machine equipped with the device of the present invention, FIG. FIG. 4 is a block diagram of the device of the present invention, FIG. 4 is a plan view showing the embroidery frame of the device of the present invention at the first stroke, FIG. 5 is a plan view of the embroidery frame of the device of the present invention at the second stroke, FIG. 6 is a view for explaining the operation of the apparatus of the present invention.
6 is a needle bar support, 12 is a thread catcher, 19 is a stepping motor for feeding, 14 is a pattern pattern selection device, 15 and 16 are sewing mode selection means, 17 is an embroidery addition operation unit, 21 is an embroidery frame, 22
Denotes an embroidery frame drive mechanism.

Claims (1)

(57) [Claims] 1. A drive shaft rotatably supported by a machine frame of a sewing machine, a needle bar which is vertically moved in conjunction with rotation of the drive shaft and has a needle attached to a lower end thereof, and a drive shaft for rotating the drive shaft. A thread catcher that is interlocked 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 amplitude movement, a first stepping motor that is connected to the needle bar support via an amplitude rod and swings, and a feed that is supported by a horizontal feed shaft. A stepping motor for feeding and controlling the feed amount of teeth, a storage device for storing control data of a pattern pattern such as a character, a pattern pattern selection device for selecting control data of a desired pattern pattern from the storage device, and a base. An embroidery frame drive mechanism including an X-direction drive mechanism supported by the machine frame and driving the carriage in the X direction and a Y-direction drive mechanism driving the carriage in the Y direction perpendicular to the X direction;
The rotation of the stepping motor is transmitted to the needle bar support, and the needle bar, the thread catcher, and the feed dog cooperate to perform zigzag normal sewing and the rotation of the first stepping motor. A sewing mode selecting means for transmitting to the X direction driving mechanism of the embroidery frame driving mechanism and selecting one of embroidery sewing in cooperation with the movement of the Y direction driving mechanism by the Y direction driving stepping motor; A switching device for switching the rotation between transmission to the needle bar support and transmission of the embroidery frame drive mechanism to the X-direction drive mechanism, and an X formed on the outer frame, comprising an inner frame and an outer frame. An embroidery frame detachably supported so as to be movable with respect to the carriage of the embroidery frame driving mechanism through a groove extending in a direction, and a return adjusted to a sliding amount of the embroidery frame by the outer frame groove. The amount And an embroidery addition operation unit for automatically returning the embroidery frame to the designated point of the additional embroidery. After the embroidery sewing process in which the embroidery sewing is selected by the sewing mode selecting means is completed, the embroidery frame slides along with the groove. An automatic embroidery sewing addition device for a sewing machine, wherein an additional embroidery is automatically performed following the embroidery of the embroidery sewing process by selecting an embroidery addition operation unit.