JPH0744308Y2 - Combined device of normal sewing machine and embroidery sewing machine in compound sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a connecting device for normal sewing and embroidery sewing of a compound sewing machine.

In particular, the present invention shares the needle bar amplitude control motor for normal sewing and the X-direction control motor for embroidery sewing, and arranges the common control motor in the normal sewing machine frame to rotate the common control motor. The present invention relates to a coupling device between a shaft and the X-direction control shaft of the embroidery sewing.

(Prior Art) In a conventional composite sewing machine, a control motor for normal sewing, such as a needle bar amplitude control motor and a feed amount control motor, is arranged in a single machine frame, and a control motor for embroidery sewing is also provided. For example, since the X-direction control motor and the Y-direction control motor must be arranged in the embroidery frame drive mechanism, the space inside the machine frame is occupied by a plurality of control motors, and the weight must be significantly increased.

(Problems to be solved by the invention) The present invention prevents the increase in weight and controls the weight by sharing the control motor required for normal sewing of the compound sewing machine and the control motor required for embroidery sewing. It is intended to prevent the difficulty of assembling separated machine frames from increasing due to the shared use of the motor.

(Means for Solving the Problems) The present invention connects a main machine frame equipped with a device for normal sewing of a compound sewing machine and a base machine frame equipped with a device for embroidery sewing by screwing or the like, and The needle bar amplitude control motor for normal sewing and the X-direction control motor for embroidery sewing are shared, and the control motor and the X-direction drive shaft are connected by a flexible shaft portion.

(Operation) In the present invention, the drive shaft 6 is rotatably supported, and the needle bar 4 is supported for vertical movement and amplitude movement in association with the rotation of the drive shaft, and the stitch formation is performed in cooperation with the needle bar. A normal sewing device movably supporting a moving thread catching mechanism is provided, and an embroidery sewing device by an embroidery frame driving mechanism that drives an embroidery frame that cooperates with the needle bar and the thread catching mechanism is provided. In a composite sewing machine including a base machine frame, one of the control of the amplitude motion of the needle bar and the drive control of the embroidery frame drive mechanism in the X direction is supported by operating the operation unit supported by the main body machine frame. A control drive motor for controlled rotation is provided, and a flexible hollow case is provided between a bearing fitted in a hole of a positioning arm integrated with the main body machine frame and a bearing portion fixed to the base machine frame. One end of the flexible rotary shaft fitted in the hollow part of the flexible hollow case is The machine frame is connected to the X-direction drive shaft, the other end is connected to the rotary shaft of the control drive motor, and the main machine frame, the base machine frame and the screws are connected to each other.

(Embodiment) The structure of an embodiment of the present invention will be described below. 1 is a main body frame in which an arm and a bed are integrated, and 2 is a front cover that covers the front opening of the main body frame. Reference numeral 3 denotes a base machine frame, which is connected to a lower portion of the main body machine frame 1.

Reference numeral 4 denotes a needle bar, which is supported by a needle bar support 5 which is swingably supported by the main body machine frame 1 and is vertically moved in association with the rotation of a drive shaft 6, and a needle 7 is attached to a lower end thereof.

A pressing rod 8 is supported on the main body machine frame 1 so as to be slidable in the vertical direction, and a cloth pressing member 9 is attached to the lower end. A drive pulley 10 is attached to the end of the drive shaft 6, and a belt 11 is hung between the drive pulley and the drive motor.

A power transmission timing belt 12 is suspended on a pulley 13 fixed to the drive shaft 6 and transmits rotation to a lower shaft (not shown) supported in the bed frame without impairing the timing.

The lower shaft is a thread catching device (not shown) that cooperates with the needle 7.
Is driven to form a stitch, and a feeding device (not shown) including the feed dog 14 is driven to feed the cloth to form a continuous main stitch.

Reference numeral 15 is a pattern sewing selection operation unit, 16 is each selection operation unit of ordinary sewing, 17 is each embroidery sewing operation unit, and 18 is the pattern pattern selected on the display unit.

Reference numeral 19 is a control drive motor, and when the normal sewing 16 is selected, the needle bar support 5 is passed through the swing arm 20 and the amplitude rod 21.
Is operated to control the needle bar amplitude for pattern sewing, and when embroidery sewing 17 is selected, the solenoid 22 is driven so that the pin at one end of the amplitude rod 21 causes the swing arm to move.
The needle bar support 5 is moved by moving in the groove of 20 and being aligned with the central position of the rotary shaft 23 of the drive control motor 19.
Is stopped and the X-direction drive mechanism of the embroidery frame drive device is driven.

An embroidery frame 24 is attached to a carriage 25 of the embroidery frame driving device. The embroidery frame driving device is disposed in the base machine frame 3, 26 is an X-direction drive shaft of a carriage 25 for mounting the embroidery frame 24, and is rotatably supported by the base machine frame 3; It is a shaft for guiding the carriage 25 in the X direction.

The carriage 25 is attached to the X-direction drive shaft 26 and the shaft portion 27.
Is provided with a lead groove 28 for moving in the direction, and a leadless groove 29 for stopping the carriage 25 at one end of the lead groove.
A carriage guide 30 for engaging with 28 is provided.

Reference numeral 32 is a Y-direction drive motor for the embroidery frame 24, which is a Y-direction drive shaft rotatably supported by the base machine frame 3.
The pulleys 36 and 37, which are connected to the motor 33 via gears 34 and 35 and are provided at both ends of the Y-direction drive shaft 33, are connected to the pulleys 38 and 39, which are rotatably supported by the base machine frame 3, respectively. Directional carriage belts 40, 41 are suspended. Between the carriage belts in the Y direction, guide bars 42, 4 supported at both ends by the machine frame of the sewing machine are provided.
A Y guide plate 44 slidable on 3 is straddled, and both ends are fixed to the belts 40 and 41 by belt pressers 45 and 46, and movement of both belts moves the carriage 25 in the Y direction. , Carriage guide by rotation of X-direction drive shaft 26
The movement of the X in the X direction slides on the guide plate 44.

Next, the connection between the main machine frame 1 having the normal sewing device and the base machine frame 3 having the embroidery sewing device will be described.

Reference numeral 1'denotes a positioning arm integrally provided at an appropriate position of the main body machine frame 1, and a bearing 48 is fitted in a fitting hole 47 formed in the positioning arm 1'in the vertical direction. Base machine frame 3
A hollow shaft of the flexible hollow case is provided between the bearing part 49 having a horizontal hole formed therein and a flexible rotary shaft 51 rotatable in the hole so that both ends thereof are exposed to the outside. Is fitted,
One end of the rotary shaft is connected to the X-direction drive shaft 26 by a joint 52, and the other end of the rotary shaft is connected to the control drive motor 19
The rotary shaft 23 is connected to a joint 53, and the main machine frame 1 and the base machine frame are connected to each other with a screw 54.

(Effect) Since the present invention has the above-described structure, when the main body frame 1 and the base machine frame 3 are coupled by screwing, the rotation shaft of the control drive motor mounted on the main body frame is Even if the position and the position of the X-direction drive shaft are slightly deviated from the predetermined position, the rotating shaft to be connected is flexible, so that the connection can be made without difficulty, and the rotary shaft is fitted in the hollow case. Therefore, since the rotary shaft is covered, it is not damaged and does not interfere with the transmission of rotation, which is extremely effective in assembling.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is an external view of a sewing machine equipped with the present invention, FIG. 2 is a perspective view of a main machine frame showing an essential part of the present invention, and FIG. 1 is a main body frame, 1'is a positioning arm, 3 is a base frame, 4 is a needle bar, 6 is a drive shaft, 19 is a control drive motor, and 23 is a control drive motor. Is a motor rotation shaft, 24 is an embroidery frame, 26 is an X-direction drive shaft, 48 is a bearing, 49 is a bearing portion, 50 is a flexible hollow case, and 51 is a flexible rotation shaft.

Claims (1)

[Scope of utility model registration request] 1. A drive shaft 6 is rotatably supported, and a needle bar 4 is supported for vertical movement and amplitude movement in conjunction with the rotation of the drive shaft, and a stitch forming motion is performed in cooperation with the needle bar. A main body machine frame 1 provided with a normal sewing device that movably supports a thread ring capturing mechanism, and an embroidery sewing device using an embroidery frame driving mechanism that drives an embroidery frame that cooperates with the needle bar and the thread ring capturing mechanism are provided. In the composite sewing machine including the base machine frame 3, one of the control of the amplitude motion of the needle bar and the drive control of the embroidery frame drive mechanism in the X direction supported by the main body machine frame is operated. A bearing which is provided with a control drive motor 19 for controlling and rotating the bearing and is fitted into the hole of the positioning arm 1'integrated with the main body machine frame 1.
A flexible hollow case 50 is provided between the base 48 and a bearing 49 fixed to the base machine frame 3, and one end of a flexible rotary shaft 51 fitted in the hollow portion of the flexible hollow case is used as a base. It is connected to the X-direction drive shaft 26 of the machine frame 3 and the other end is the rotation shaft of the control drive motor 19.
A connecting device for a normal sewing device and an embroidery sewing device in a compound sewing machine, which is connected to a main machine frame 1 and a base machine frame 3 by screws.