JP2002102570A - Sewing frame drive device for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase drive ranges in the X-direction and the Y-direction so that the long member of an X-direction drive mechanism and the long member of a Y-direction drive mechanism do not interfere with each other. SOLUTION: An X-direction drive frame 11 is connected to the right Y short side 10c of a sewing frame 10 stretching and holding a work fabric, a Y- direction drive frame 15 is connected to the rear X long side 10a, and both drive frames 11 and 12 cross each other separately above the below in this sewing machine. The X-direction drive frame 11 located on the lower side in the crossing is driven by the X-direction drive mechanism 20 provided below the drive mechanism 11, and the Y-direction drive frame 15 located on the upper side in the crossing is driven by the Y-direction drive mechanism 30 provided above the drive frame 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for driving a sewing frame for extending and holding a work cloth in the X and Y directions of a sewing machine. In a sewing machine, the left-right direction is conventionally called the X direction (or V direction), and the front-rear direction is called the Y direction (or H direction).

[0002]

2. Description of the Related Art Many sewing frames (embroidery frames) used in embroidery sewing machines for business use are formed in a flat rectangular frame shape, and one work cloth is stretched and held in the frame. When the sewing frame is small, bending deformation does not occur because of high rigidity. However, when the sewing frame is large and each side is long, it is difficult to secure the rigidity. Therefore, one or two application points on the side are driven. Alone
When the action point moves, the embroidery frame may be deformed.

[0003] As one mechanism for preventing this bending deformation,
JP-A-5-163660 discloses that, as shown in FIG. 4, a driver 51 is connected to one of the short sides of an embroidery frame 50 on a table 80 and one of the long sides of the embroidery frame 50 is attached to the table 80. The X-direction driving mechanism 60 and the Y-direction driving mechanism 70 provided below the table 80 are connected to both the driving bodies 51 and 55, and are connected via the driving bodies 55. A mechanism has been proposed in which the embroidery frame 50 is driven from the short side and the long side to prevent bending deformation of the embroidery frame 50 regardless of the movement of the action point. Both driving bodies 51, 55
Are set sufficiently longer than the sides of the corresponding embroidery frame 50, and are shifted up and down so as not to interfere with each other.

[0004]

As described above, when both the driving bodies are driven by the X-direction driving mechanism 60 and the Y-direction driving mechanism 70 provided below the table 80, the X-direction driving mechanism 60 and the Y-direction driving mechanism are driven. The structure 70 is a long member extending in the X direction and the Y direction, for example, a rail base mounted on the machine frame, a guide rail mounted on the rail base, and slit plates 81 and 82 provided on the table 80.
(For releasing a member connecting the driving mechanism and the driving bodies 51 and 55) and the like, the X-direction driving mechanism 6
In some cases, the long member of the zero direction and the long member of the Y-direction driving mechanism 70 easily interfere with each other, and in order to avoid the interference, the driving range in the X direction or the Y direction must be suppressed to a small value.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a sewing frame driving apparatus for a sewing machine in which an X-direction driving frame and a Y-direction driving frame are connected to a sewing frame and crossed vertically. An object of the present invention is to provide a sewing machine frame driving device for a sewing machine that does not cause interference between a long member of the mechanism and a long member of a Y-direction driving mechanism, and can thereby increase a driving range in the X direction or the Y direction.

[0006]

According to the present invention, an X-direction drive frame for driving the sewing frame in the X direction is connected to the Y side of the sewing frame for extending and holding the work cloth. A sewing frame for a sewing machine in which a Y-direction drive frame for driving the sewing frame in the Y-direction is connected to the X side of the sewing frame, and the X-direction drive frame and the Y-direction drive frame are shifted up and down to intersect. In the driving device, the lower one of the X-direction drive frame or the Y-direction drive frame at the intersection is driven by a drive mechanism provided below the drive frame, and the upper one is at the intersection. The drive frame is driven by a drive mechanism provided above the drive frame.

[0007]

1 to 3 show a sewing machine according to an embodiment of the present invention. The sewing machine has a machine frame including a pair of left and right columns 1 standing on the floor, and a lower frame 2 and an upper frame 3 supported between a lower portion and an upper portion of the columns 1 and extending in the left and right direction, respectively. A table 4 is supported on the lower frame 2 substantially horizontally. A slit plate 5 having an X-direction slit for movably inserting a projecting member of an X-direction driving mechanism described later is attached to the front and rear portions of the table 4. A plurality of sewing heads 6 are arranged in a row at a predetermined interval in the left-right direction on the front surface of the upper frame 3, and a plurality of beds 7 are provided on the lower frame 2 at positions directly below the respective sewing heads 6 and are substantially the same as the table 4. They are arranged at height. As is well known, sewing is performed on a work cloth which will be described later by cooperation of a needle driven up and down by the sewing machine head 6 and a shuttle driven by the bed 7.

Immediately above the table 4, a sewing frame 10 in the form of a horizontally long rectangular frame for directly holding and stretching a work cloth.
(An embroidery frame in an embroidery sewing machine) is provided. These sides are defined as a rear X long side 10a, a front X long side 10b, and a right Y
It is assumed that the short side 10c and the left Y short side 10d.

First, an X-direction drive frame 11 for driving the sewing frame 10 in the X direction is provided on the right edge of the right Y short side 10c.
However, they are coupled so as to be relatively immovable in the X direction and relatively movable in the Y direction. Specifically, the X-direction drive frame 11
Is formed at the left edge of the vertical wall 12 extending in the Y direction from the plane wall, and at the right edge of the right Y short side 10c is formed a horizontal wall sunk below the shaped portion. A pair of engagement rollers 13 rotatably mounted on a pair of support shafts provided upright are engaged with one of the vertical walls 12 so as to sandwich it. Right Y short side 10c and X direction drive frame 1
1 and the relative movement in the X direction is because the engaging roller 13 is in contact with the vertical wall 12, and the relative movement in the Y direction is because the engaging roller 13 rotates to allow the relative movement. is there. This engagement roller 13 is located on the right Y short side 10
A plurality of pairs are provided in the Y direction of c.

A Y-direction drive frame 15 for driving the sewing frame 10 in the Y direction is provided at the rear edge of the rear X long side 10a.
Are coupled so as to be relatively immovable in the Y direction and relatively movable in the X direction. Specifically, the Y-direction drive frame 15
A vertical wall 16 extending from the plane wall in the X direction is formed at the front edge of the pair. The vertical wall 16 has a shape portion hanging therefrom. The pair of shafts are rotatably mounted on a pair of support shafts erected on the rear long X side 10a. An engaging roller 17 is engaged with one of the vertical walls 16 so as to sandwich it. The reason why the rear X long side 10a and the Y-direction drive frame 15 cannot move relative to each other in the Y direction is because the engaging roller 17 is in contact with the vertical wall 16; Rotate to allow relative movement. A plurality of pairs of the engagement rollers 17 are provided in the X direction of the rear X long side 10a.

X-direction drive frame 11 and Y-direction drive frame 15
Are set to be sufficiently longer than the corresponding right Y short side 10c and rear X long side 10a, and are shifted up and down so as not to interfere with each other. Then, since the X-direction drive frame 11 is on the lower side, the X-direction drive frame 11 is driven in the X-direction by the X-direction drive mechanism 20 provided below the drive frame 11, and the Y-direction drive frame 15 is Of the Y-direction drive frame 15
Are driven in the Y direction by a Y direction driving mechanism 30 provided above the driving frame 15.

The X-direction drive mechanism 20 includes an X-direction drive frame 11.
And a guide rail 21 attached to the rail base 8 of the lower frame 2 below the table 4, and a slider 22 slidably engaged with the guide rail 21.
A connecting member 23 for connecting the slider 22 and the X-direction drive frame 11 to allow the slit of the slit plate 5 to pass through, and a pair of pulleys 24 provided on the rail base 8 at both ends of the guide rail 21. A drive belt 25 wound around both pulleys 24 and stretched in a long loop shape surrounding the upper and lower portions of the guide rail 21, and a motor 26 for driving the drive belt 25 by rotating the pulleys 24.
The slider 22 is connected to one portion of the drive belt 25.

The Y-direction drive mechanism 30 includes a Y-direction drive frame 15.
A guide rail 31 provided above the table 4 and attached to the left and right rail bases 9 of the upper frame 3; a slider 32 slidably engaged with the guide rail 31; A connecting member 33 for connecting the directional drive frame 15 and the guide rail 31
A pair of pulleys 34 provided on the rail base 9 at both ends of the drive rail, a drive belt 35 wound around the two pulleys 34 and stretched in a long loop shape surrounding the upper and lower sides of the guide rail 31, and rotating the pulleys 34 Drive belt 3
5 for driving the motor 5. The slider 32 is connected to one portion of the drive belt 35.

The operation of the sewing frame driving device of the sewing machine constructed as described above will be described. When the motor 26 of the X-direction driving mechanism 20 is driven based on the sewing data, the driving belt 25 is driven and the slider 22 is driven. Moves in the X direction, and its driving force is transmitted to the right Y short side 10c of the sewing frame 10 via the connecting member 23 and the X direction driving frame 11, and the sewing frame 10
Are driven in the X direction. Similarly, when the motor 36 of the Y-direction drive mechanism 30 is driven based on the sewing data, the drive belt 35 is driven to move the slider 32 in the X direction, and the driving force is applied to the connecting member 33 and the Y-direction drive frame. 15 to the rear long X side 10a of the sewing frame 10, and the sewing frame 10 is driven in the Y direction.

According to the sewing frame drive device of the sewing machine of the present embodiment, the right Y short side 10c and the rear X long side 10a are driven via the X direction drive frame 11 and the Y direction drive frame 15. Irrespective of the movement of the action point, the bending deformation of the sewing frame can be prevented.

An X-direction drive mechanism 20 for driving the X-direction drive frame 11 is provided below the drive frame 11, and a Y-direction drive mechanism 30 for driving the Y-direction drive frame 15 is provided by the drive frame 15. Since it is provided above, a long member (rail base 8, rail base 8,
Guide rail 21, drive belt 25 and slit plate 5)
Does not interfere with the long members (rail base 9, guide rail 31, and drive belt 35) of the Y-direction drive mechanism 30 extending in the Y-direction, thereby greatly increasing the drive range in the X-direction or Y-direction. Can be taken.

It should be noted that the present invention is not limited to the configuration of the above-described embodiment, and can be embodied by appropriately changing the scope of the invention as follows, for example, as follows. (1) The X-direction drive mechanism 2 provided above the X-direction drive frame 11 with the X-direction drive frame 11 facing upward at the intersection.
0, and the Y-direction drive mechanism 30 provided below the Y-direction drive frame 15 with the Y-direction drive frame 15 facing downward.
Driven by (2) The specific structures of the X-direction drive mechanism 20 and the Y-direction drive mechanism 30 are not particularly limited. For example, a drive mechanism using a combination of a rotationally driven ball screw and a nut screwed into and screwed into the ball screw is employed. be able to.

[0018]

As described in detail above, according to the present invention,
In a sewing frame drive device of a sewing machine, in which an X-direction drive frame and a Y-direction drive frame are coupled to a sewing frame and vertically shifted to intersect, a long member of an X-direction drive mechanism and a long member of a Y-direction drive mechanism are provided. , The driving range in the X direction or the Y direction can be widened.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sewing machine according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing an X-direction drive mechanism of the sewing machine.

FIG. 3 is a side sectional view showing a Y-direction drive mechanism of the sewing machine.

FIG. 4 is a perspective view of a conventional sewing machine.

[Description of Signs] 2 Lower frame 3 Upper frame 4 Table 5 Slit plate 8 Rail base 9 Rail base 10 Sewing frame 10a Rear X long side 10c Right Y short side 11 X direction drive frame 15 Y direction drive frame 20 X direction drive Mechanism 21 Guide rail 25 Drive belt 30 Y-direction drive mechanism 31 Guide rail 35 Drive belt

Claims (1)

[Claims] 1. An X-direction drive frame for driving the sewing frame in the X direction is connected to the Y side of the sewing frame for extending and holding the work cloth, and the sewing frame is connected to the X side of the sewing frame in the Y direction. In a sewing frame driving device for a sewing machine, in which a Y-direction driving frame for driving is combined and an X-direction driving frame and a Y-direction driving frame are vertically displaced and intersected, the X-direction driving frame or the Y-direction driving frame The lower drive frame at the intersection is driven by a drive mechanism provided below the drive frame, and the upper drive frame at the intersection is provided by a drive mechanism provided above the drive frame. A sewing frame driving device for a sewing machine, wherein the driving device is configured to be driven.