JPH04354969A - Separable type x-y drive device of combined sewing machine - Google Patents

Abstract

PURPOSE:To improve convenience and handling of using a sewing machine by disposing a broidering frame X-Y drive mechanism in a casing under a bed frame to constitute the mechanism and the bed frame mechanically and electrically combined or separated and by separating the casing in frequent ususal sewing. CONSTITUTION:When usual sewing is selected in a controlling section 47, a usual sewing forming device is controllably driven by control data selected on a key board 48 and read out of a CPU in a sewing machine frame 1. On the other hand, when embroider sewing is selected, an embroider sewing forming device including a X-Y drive mechanism in a unit case 15 is controllably driven. Then, when the usual sewing is frequently used, the unit case 15 is separated from tge sewing machine frame 1. That is, while respective connectors of both 15, 1 are separated from each other, a pin shaft 16 is drawn out of hole 17. When the unit case 15 is recombined with the sewing machine frame 1, the X-Y drive mechanism is automatically returned to the initial position.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compound sewing machine, and more particularly to a separable X-Y drive device in a compound sewing machine capable of performing regular sewing and embroidery sewing.

0002

[Prior Art] A conventional combination sewing machine has a normal stitch forming device and an embroidery stitch forming device disposed within the machine frame, and when either one of the two forming devices is selectively driven, the other is in a rest state. Therefore, if the user chooses one forming device, the other forming device becomes almost useless.

0003

SUMMARY OF THE INVENTION The present invention provides a combination sewing machine equipped with a normal seam forming device and an embroidery stitch forming device, in which when one of the two forming devices is selectively driven, the other is stopped. The purpose of this invention is to make it possible to separate the X-Y drive mechanism, which constitutes the main component of the embroidery stitch forming device, which is generally in a dormant state when a single drive system is adopted.

0004

[Means for Solving the Problems] The present invention provides a compound sewing machine capable of normal sewing and embroidery sewing, which includes an arm machine frame to which a needle bar movement device is attached, and a thread ring that moves synchronously with the needle bar movement device. A cased embroidery frame The above object is achieved by arranging the parts so as to be electrically separable.

[0005]

[Operation] The present invention comprises a needle bar which is attached to the arm machine frame and moves up and down in conjunction with the rotation of the drive shaft, and a thread ring catching device and cloth feeding device which are attached to the bed machine frame and move in synchronization with the rotation of the drive shaft. A normal stitch forming device that performs normal stitching, and a carriage that causes the vertically moving needle bar and embroidery frame to move in a plane based on control data in synchronization with the rotation of the drive shaft.
- an embroidery stitch forming device that performs embroidery stitching with a Y drive mechanism;
In a compound sewing machine comprising a selection operation section for selectively driving either the embroidery stitch forming device or the normal stitch forming device, the sewing machine accommodates an X-Y drive mechanism of the embroidery stitch forming device, and A unit case that is separable from the frame is provided, and a support base on which the unit case is placed is horizontally protruded from the sewing machine frame below the bed machine frame, and is opposed to the sewing machine frame of the unit case. A positioning engagement part is provided on the end face, and an X disposed inside the unit case.
- The control electric motor for the Y drive mechanism and the control data storage section disposed within the sewing machine frame are connected by a divisible connection section, and the selection operation section is used to embroidery. The unit case housing the X-Y drive mechanism can be separated from the sewing machine frame except when sewing is selected, and therefore the sewing machine can be made smaller during normal sewing. This makes it easy to handle, and especially portable types are convenient for transportation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be explained below with reference to the drawings. Sewing machine frame 1 is arm machine frame 2 and bed machine frame 3.
It is made up of. A drive shaft 6 that is rotated by an electric motor 4 via a belt 5 is supported on the arm machine frame 2, and a needle bar 8 that moves up and down in conjunction with the rotation of a fixed take-up crank 7 is attached to one end of the drive shaft. has been done. The needle bar is pivotably mounted and supported by a needle bar support 9 connected to an amplitude control stepping motor 10 driven by control data, and has a needle fixed to its lower end.

The bed machine frame 3 has a cylindrical shape, and includes a thread ring catching device for holding the bobbin thread and catching the bobbin thread passed through the needle, and a cloth feeding device using a feed dog (none of which are shown in the figure). The lower shaft 12 is rotated via a belt 11 suspended from the drive shaft 6, and both devices are moved in synchronization with the movement of the needle bar 8.

The sewing machine frame 1 is provided with a support stand 13 projecting horizontally below the bed machine frame 3 at an appropriate distance from the bottom of the bed machine frame. Above, a unit case 15 formed in an L-shape by cutting out a part of the upper surface 14 has an upper surface 14 that is approximately at the same height as the upper surface of the cylindrical bed machine frame 3 and a side surface of the L-shaped portion. The pin shafts 16, 16, which are engaging portions provided on the side surface of the unit case 15 facing the machine frame 1, are placed on the front side surface 3F by sliding in the X direction so as to be in close contact with the machine frame 1. The unit case 15 is mechanically coupled to the machine frame 1 by fitting into the holes 17, 17.

[0009] Inside the unit case 15, two parallel X drive shafts 18 and 19 are arranged along the front edge and the rear edge. Both X drive shafts each have a pair of bearing portions 20,
It is rotatably supported by 20 and 21, 21,
Lead grooves 22, 22 are formed on the outer periphery. A gear 23 is fixed to one end of the X drive shaft 18 on the front edge side.
The gear is the shaft gear 2 of the stepping motor 24 for X-axis control.
A pulley 26 is fixed to the other end of the pulley 26, which is fixed to the other end of the X drive shaft 19 on the rear edge side.
7 via a belt 28 suspended between the two.

A carriage guide plate 29 is suspended between the X drive shafts 18 and 19, and carriage guides 30 and 30 at both ends of the carriage guide plate are connected to the X drive shaft 18.
, 19 so as to be slidable in the axial direction, and guide pins 31, 31 provided on the carriage guide are engaged with the lead grooves 22, 22. A detected arm 29A projects from one end of the carriage guide plate 29 near the carriage guide 30. X-direction sensor 29 that detects the arm to be detected
B is provided at an appropriate position near the right bearing portion 20 on the front edge side.

The carriage 32 is connected to the carriage guide plate 29.
rollers 33 mounted on the top surface of the carriage and provided on the left and right sides of the carriage.
, 33 are configured to sandwich the sides of the carriage guide plate so that the carriage 32 can move in the Y direction on the carriage guide plate, and an embroidery frame mounting portion 34 formed by bending upward at one end is attached to the unit case 15. It is set up so that it faces the outside.

A Y drive shaft 35 is rotatably supported in parallel to the X drive shaft 19 by the bearings 21, 21 on the rear edge side, and a gear 36 is fixed to one end of the Y drive shaft. A shaft gear 38 of a stepping motor 37 for Y-axis control meshes with the gear, and pulleys 39, 39 are fixed to positions adjacent to both bearing portions 21, 21 of the Y drive shaft, respectively. Belts 41, 41 are suspended between pulleys 40, 40 provided on both bearing parts 20, 20 on the side.

Y guide shafts 42, 42 are connected to the X drive shafts 18, 19 between the two bearing parts 20, 20 on the front edge side and the two bearing parts 21, 21 on the rear edge side facing each other. Both Y guide shafts 42, 4 are provided at approximately right angles.
2 includes Y guide bodies 44 provided at both ends of the Y guide plate 43.
, 44 are fitted to support the Y guide plate 43 so as to be movable in the Y direction.

The Y guide plate 43 is placed on the carriage guide plate 29, and is guided and supported by a guide roller 45 mounted on the carriage 32 so as to be movable in the X direction on its side surface. Both ends are Y
Pulleys 39, 39 of the drive shaft 35 and opposite pulleys 40, 4
It is fixed to belts 41, 41 which are suspended at 0. A detected arm 43A in the Y direction projects from the left end of the Y guide plate 43. A Y-direction sensor 43B for detecting the arm to be detected is provided at an appropriate position near the left bearing portion 20 on the front edge side.

Inside the unit case 15, transmission codes for control data for each of the X-axis control stepping motor 24 and the Y-axis control stepping motor 37, the X-direction sensor 29B, and the Y-direction sensor 43 are installed.
The signal transmission cords of each of B are concentrated in a connector 46.

A keyboard 48 on the front surface of the sewing machine frame 1, which is easy for the operator to operate, is provided with various keys such as a sewing pattern selection key and keys for a selection operation section 47 for normal stitching and embroidery stitching; A display section 49 is provided for providing information and instructions to the operator, and the pin shafts 16, 16 on the casing side are attached to the connecting surface with the unit case 15 located below the bed machine frame 1. connecting hole 17, 1
7 is provided.

Separation operating portions 50 for disconnecting from the unit case 15 are provided at appropriate locations on the sewing machine frame 1, and separation operation portions 50 for disconnecting from the unit case 15 are provided at other locations for controlling the X and Y axes provided within the unit case 15. Stepping motors 24 and 37 and a stepping motor control circuit 51 provided inside the sewing machine frame 1
and the X and Y direction sensors 29B and 43B inside the unit case 15 and C, P, inside the sewing machine frame 1.
A connector 52 for connecting to a U (central processing unit) 51 is provided.

Since the present invention has the above-described configuration, when normal stitching is selected by the selection operation section 47 and the sewing machine is operated, the sewing machine frame 1 is selected separately from the sewing machine frame 1, which is selected on the keyboard 48. The normal stitch forming device is driven by the control data read from the storage sections in C, P, and U51, thereby making it possible to obtain a desired pattern stitch. When embroidery stitching is selected by the selection operation section 47 and the sewing machine is operated, the embroidery stitching control data read from the C, P, and U51 causes the The embroidery stitch forming device is driven, and a desired embroidery stitch can be formed on the fabric stretched over the embroidery frame via the embroidery frame fixed to the carriage 34.

Further, in the present invention, when the selection of stitches is biased to normal stitches and the state in which embroidery stitches are not used continues, the unit case 15 housing the X-Y drive mechanism of the embroidery stitch forming device is removed from the unit case 15. It can be separated from the sewing machine frame 1. When separating the unit cases, separate the connector 46 of the unit case 15 from the connector 52 of the sewing machine frame 1, and then operate the separation operation section 50 to move the pin shaft 16 on the unit case 15 side to the sewing machine frame 1. It is pulled out from the side hole 17 and separated.

According to the present invention, when the separated unit case is mounted on the sewing machine frame again, when the embroidery stitch is selected,
Since both the axis control stepping motor 24 and the Y-axis control stepping motor 37 are configured to automatically return to their initial positions, the carriage, that is, the embroidery frame always starts from the initial position. . Therefore, the X-Y drive mechanism can always accurately move the embroidery frame.

[0021]

[Effects] Since the present invention has the above-described structure and function, it is possible to selectively perform both regular sewing and embroidery sewing, so it is possible to perform practical sewing and decorative sewing. Furthermore, since the X-Y drive mechanism of the embroidery stitch forming device can be separated from the sewing machine frame, when selecting normal stitches for a long time, the
- By removing the unit case of the Y drive mechanism, the sewing machine becomes more compact, making it easier to handle, and it is especially useful for portable type transportation, which has a great practical effect. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an external view of a sewing machine equipped with the device of the present invention, and FIG. 2 is an external view of a sewing machine equipped with the device of the present invention, showing a partially separated state. 3 is a perspective view showing the internal structure of a sewing machine equipped with the device of the invention, FIG. 4 is a perspective view showing the structure inside the unit case of the invention, and FIG. 5 is a block diagram of the invention. 1 is the sewing machine frame 2 is the arm machine frame 3 is the bed machine frame 6 is the drive shaft 8 is the needle bar 13 is the support stand 15 is the unit case 16 is the engaging part 24 is the electric motor for X-axis control 37 is the electric motor for Y-axis control

Claims (1)

[Claims] Normal sewing is performed using a needle bar that is attached to the arm machine frame and moves up and down in conjunction with the rotation of the drive shaft, and a thread ring capture device and cloth feed device that are attached to the bed machine frame and move in synchronization with the rotation of the drive shaft. Embroidery stitches are performed using a normal stitch forming device, the needle bar that moves up and down, and an X-Y drive mechanism that synchronizes the embroidery frame with the rotation of the drive shaft and includes a carriage that moves the embroidery frame in a plane based on control data. In a compound sewing machine, the compound sewing machine includes an embroidery stitch forming device that performs X-Y driving of the embroidery stitch forming device, and a selection operation section that selectively drives either the embroidery stitch forming device or the normal stitch forming device. A unit case that accommodates the mechanism and is separable from the sewing machine frame is provided, a support base on which the unit case is placed is provided horizontally protruding from the sewing machine frame below the bed machine frame, and the unit A positioning engagement portion is provided on an end face of the case facing the sewing machine frame, and a control electric motor for an X-Y drive mechanism disposed within the unit case and a control data storage unit disposed within the sewing machine frame are connected to each other. A separable X-Y drive device for a compound sewing machine, characterized in that the device is connected by a separable connection part.