JPH10113489A - Driving device of sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact driving device with a reduced number of part items of a sewing machine which is able to shift the position of a motor by means of controlling without moving an electric box. SOLUTION: An electric box 22 is fixed to a table 3 of a sewing machine, and a motor 24 is attached to the electric box 22, also, a controlling means 25 to control positions of the motor 24 is installed. By this structure, a base for a motor, a previous necessity, becomes unnecessary to facilitate reducing a number of part items required, and even when the motor 24 is moved for the sake of position adjustment, the electric box 22 is not shifted.

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 a sewing machine having a motor for driving the sewing machine and an electrical box for controlling the motor.

[0002]

2. Description of the Related Art As is well known, a driving device for a sewing machine generally includes a motor and an electrical box for controlling the motor. FIG. 5 shows an example of a conventional driving device for a sewing machine. In this figure, reference numeral 1 denotes a motor, and reference numeral 2 denotes an electrical box.

[0003] The motor 1 is attached to a table 3 of a sewing machine on a lower surface via a motor base 5.
The upper and lower positions can be adjusted by adjusting means 4. The adjusting means 4 is configured as follows. That is, the motor 1 is rotatably connected to one end of a motor base 5 fixed to the lower surface of the table 3 by a shaft 6. Further, a protrusion 7 is formed on the outer peripheral portion of the motor 1, a bolt 8 is inserted into the protrusion 7, and the motor 9 is attached by tightening nuts 9, 9. The upper end of the bolt 8 is bent at a right angle, and the bent portion is rotatably inserted into a hole formed at the other end of the motor base 5.

Therefore, the motor 1 adjusts its vertical position by loosening the nuts 9 and 9 of the adjusting means 4 and rotating the shaft 6 with the shaft 6 as a fulcrum.
By tightening the nuts 9 at a predetermined height position, the nuts 9 are fixed at the predetermined height position.

A pulley 10 is attached to the drive shaft of the motor 1 as shown in FIG. 6, and this pulley 10 is connected to a pulley cover 11 attached to the motor 1 as shown in FIG. Covered. The pulley 1
And a sewing machine main body 12 fixed to the upper surface of the table 3.
A belt 13 is wound around the pulley, so that the driving force of the motor 1 is transmitted to the sewing machine main body 12.

On the other hand, the electric box 2 is for controlling the driving speed of the motor 1 and the like. As shown in FIGS. 5 and 6, a mounting bracket 14 is fixed on the upper part of the electric box 2. ing. This mounting bracket 14
Are mounted on the lower part of the outer periphery of the motor 1 by screws 14a, 14a, whereby the electrical box 2 is mounted on the motor 1.

Further, a support table 1 for supporting the table 3
As shown in FIGS. 6 and 7, a pedal 16 to be stepped on with a foot is rotatably mounted on the lower end of the shaft 5 with a shaft 16 a as a fulcrum. The lower end of the pedal connecting rod 17 is pin-connected to the tip of the pedal 16.
Is connected to a lever 19 of a pedal sensor 18 provided on the electrical box 2 by a pin. Therefore, the lever 19 is operated via the pedal connecting rod 17 by depressing the pedal 16, whereby the driving speed of the motor 1 is controlled.

[0008]

However, the driving device for a sewing machine having the above configuration has the following disadvantages. That is, first, the electrical box 2 is attached to the motor 1 so as to hang from the motor 1, so that a load is applied to the motor 1 from the electrical box 2. Therefore, in order to securely and firmly fix the motor 1 to the lower surface of the table 3, the motor 1 is fixed by interposing the motor base 5 between the motor 1 and the table 3. Parts were required and the number of parts was increased.

Further, in the driving device for the sewing machine,
The height position of the motor 1 is adjusted by the adjusting means 4 according to the diameter of the pulley 10 attached to the drive shaft of the motor 1 and the length of the belt. In this case, since the electrical box 2 is attached to the motor 1, When the motor 1 is moved up and down to adjust the height position, the electric component box 2 is also moved up and down together with the motor 1. When the electrical box 2 moves up and down, the pedal sensor 18 provided therein also moves up and down, and the position of the pedal sensor 18 and the mounting angle of the pedal 16 change. Therefore, the length of the pedal connecting rod 17 must also be adjusted. This adjustment work was troublesome.
Further, since the electrical component box 2 is attached to the motor 1 in a hung state, the electrical component box 2 is attached to the motor 1.
Therefore, a large force is required to move the motor 1 for adjusting the height position of the motor 1.

The motor 1 is controlled by the adjusting means 4.
In order to move the motor 1 up and down, the motor 1 rotates around the shaft 6 so that the motor 1 moves forward and backward (left and right in FIG. 6). When the motor 1 moves back and forth, the electrical component box 2 attached in a state of hanging therefrom moves greatly back and forth, so that there is a problem that the space required for the movement must be increased. .

In particular, in FIG. 6, when it is desired to install the motor 1 at the lowest position, the electrical box 2 may protrude to the left from the rear end 3a of the table 3 and a problem arises in the installation space of the sewing machine. Would. When it is desired to install the motor 1 at the uppermost position, as shown in FIG. 7, the electric box 2 moves to the pedal 16 side (sewer side), and Is difficult to step on, and there is a problem that operability is deteriorated.

Further, since the operation box 2 is separately mounted below the motor 1, there is a problem that the driving device itself becomes relatively large.

The present invention has been made in view of the above circumstances, has a small number of parts, can adjust the position of the motor by adjusting means without moving the electrical box itself, and furthermore, the apparatus itself is compact. It is an object of the present invention to provide a driving device for a sewing machine.

[0014]

According to a first aspect of the present invention, there is provided a driving device for a sewing machine, wherein an electric box is supported on a table of the sewing machine, and a motor is mounted on the electric box. is there.

The electrical box may be directly supported and fixed to the lower surface of the table by bolts or the like, or may be fixed via elastic rubber or the like.
It may be fixed indirectly to the lower surface of the table via attachment means or the like. The motor is preferably provided with a motor support in the electrical box and supported by the motor support. However, the motor may be directly or indirectly attached to the outer surface of the electrical box. Further, a pulley cover for covering a pulley to be attached to a drive shaft of the motor is attached to the electrical component box. In this case, since vibration is not directly transmitted to the pulley cover from the motor, it is not necessary to form the pulley cover so strongly.

In the driving device for a sewing machine according to the first aspect,
Since the electrical box is supported on the table of the sewing machine and the motor is mounted on the electrical box, a motor base and a mounting bracket, which have been required in the past, become unnecessary, thereby reducing the number of parts.

According to a second aspect of the present invention, there is provided a driving device for a sewing machine.
In the above, the electric component box is provided with an adjusting means for adjusting the position of the motor. The adjusting means adjusts a height position of the motor by a diameter of a pulley attached to a driving shaft of the motor, a length of a belt, and the like.For example, one end of the motor is supported by a frame of the electrical box. The motor is rotatably mounted, and a long bolt is inserted into the other end of the motor, and the other end of the motor is fixed to the bolt with a nut. It is constituted by being rotatably attached to the.

In the adjusting means having the above structure, the nut is loosened, and the upper and lower heights are adjusted by rotating the motor with one end as a fulcrum, and the nut is adjusted at a predetermined height. The motor is fixed at a predetermined height position by tightening and fixing the other end of the motor to a bolt. The adjusting means is not limited to the above-described configuration, and may be configured so that the motor can be slid up and down in the electrical component box and fixed at a predetermined height position.

Further, by mounting a pulley cover for covering a pulley to be mounted on the drive shaft of the motor, the pulley cover does not move even if the motor moves. Therefore, the gap between the pulley cover and the table of the sewing machine can be kept constant, and it is not necessary to adjust the gap.

[0020] In the driving device for a sewing machine according to claim 2,
The height position of the motor is adjusted by the adjusting means,
Since the motor whose height is adjusted by this adjusting means is mounted on the electrical box fixed to the table of the sewing machine, even if the motor is moved for the adjustment, the electrical box is fixed and moved. Will not
Therefore, there is no need to perform the adjustment work for the electrical box system. Also, unlike the related art, since the electrical box is not hung on the motor, a large force is not required to move the motor 1 for adjusting the height position of the motor. Further, since the electric box does not move even when the motor is moved, the space for moving the electric box, which is conventionally required, is not required.

According to a third aspect of the present invention, there is provided a driving device for a sewing machine.
Or In 2, the pulley of the motor is disposed on the right side of the electrical box.

When the motor is supported in the electrical box, a motor support is provided in the electrical box and the motor is supported by the motor support. Therefore, the motor supporting portion is provided at a position adjacent to the side surface of the electrical box, and the motor is supported by the motor supporting portion with its drive shaft protruding from the side surface of the electrical box.

According to a third aspect of the present invention, there is provided a driving device for a sewing machine.
Since the motor pulley is located on the right side of the electrical box, the electrical box can be located below the sewing machine, and there is no need to extend the sewing machine table of the sewing machine to the right and attach the electrical box. When the pulley is located on the left side of the electrical box, the conventional sewing machine table must be extended to the right side of the sewing machine pulley to secure the electrical box mounting part because the pulley of the sewing machine and the motor pulley are arranged on a vertical line. Was. Also, by disposing the motor pulley on the right side, the electrical box is relatively located on the left side of the pulley, and the pedal is also located on the left side. The sewing machine can be arranged below the needle, and the operability of the sewing machine pedal in the sewing operation can be improved.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an embodiment of a driving device for a sewing machine according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic front view showing an entire sewing machine including a sewing machine driving device according to the present invention. In FIG.
Is a table of a sewing machine, and a driving device 20 of the sewing machine according to the present invention is provided on a lower surface side of the table 3 of the sewing machine. The electric drive box 20 is fixed to the lower surface of the table 3 via fixing means 21.
Is provided with a motor support 23, and the motor support 23
And the motor 24 is supported.

Next, details of the sewing machine driving device 20 will be described with reference to FIGS. In the sewing machine drive device 20 shown in these figures, the electrical component box 22 is directly fixed to the lower surface of the table 3 with bolts or the like. The electrical box 22 has a box shape, and the motor support portion 23 is formed at an upper right corner in a front view. The motor support portion 23 has an open front side and a right side as viewed from the side of the sewer.
The motor 24 is provided on the motor support 23 with the adjusting means 2.
5 supports the height position thereof in an adjustable manner.

The adjusting means 25 adjusts the height position of the motor 24 according to the diameter of the pulley 10 attached to the drive shaft 24a of the motor 24, the length of the belt 13, and the like.
It is configured as follows. That is, as shown in FIG. 2, a shaft 26 is provided upright on the frame located in the motor support portion 23. On the other hand, a mounting arm 24b is projected from an outer peripheral portion of the motor 24, and the mounting arm 24b is rotatably connected to the shaft 26. Therefore, the motor 24 can be adjusted in height by rotating vertically with the shaft 26 as a fulcrum.

A protrusion 24c is provided on the outer periphery of the motor 24 at a position radially opposed to the mounting arm 24b.
Is protruding. A through hole is formed in the projection 24c, and a long bolt 28 is inserted into the through hole. Nuts 29, 29 are screwed into the bolt 28 so as to sandwich the projection 24 c. By tightening the nuts 29, 29, the projections 24 c
Are fixed to the bolt 28. The upper end of the bolt 28 is bent to the right at a right angle as shown in FIG. 3, and the bent portion 28a is rotatable around an axis in a hole formed in the frame of the electrical box 22. It has been inserted.

Therefore, the motor 24 is moved up and down in the motor support portion 23 with the shaft 26 as a fulcrum by loosening the nuts 29 and 29 of the adjusting means 25 to thereby adjust the vertical position thereof. By adjusting and tightening the nuts 29, 29 at a predetermined height position, the nuts 29, 29 are fixed at the predetermined height position.

The motor 24 is shown in FIGS.
As shown in FIG. 3, the drive shaft 24a is supported by the motor support portion 23 in a state of protruding from the right side when viewed from the side of the sewing machine of the electrical component box 22. A pulley 10 is attached to the drive shaft 24a, and the pulley 10 is disposed directly below the pulley of the sewing machine body 12.

By arranging the motor 24 in this way,
A good arrangement of the motor 24, which takes up the least amount of support space in the electrical box 22, makes the electrical box 2
2 can be made compact. Also, the motor 24
Since the drive shaft 24a projects from the side surface of the electrical component box 22, the pulley 10 to be mounted on the drive shaft 24a can be easily attached or replaced.

A pulley cover 30 is attached to the right side of the electrical box 22. The upper surface of the pulley cover 30 is close to the lower surface of the table 3 of the sewing machine. When the pulley cover 30 is attached to the electrical component box 22 in this manner, the vibration is not directly transmitted from the motor 24 to the pulley cover 30, so that the pulley cover 30 does not need to be formed so strongly, and the cost is reduced accordingly. Can be suppressed. The motor 24
Is moved by the adjusting means 25, the pulley cover 3
Since the "0" does not move, the gap between the pulley cover 30 and the table 3 of the sewing machine can be kept constant, and it is not necessary to adjust the gap.

The support table 1 for supporting the table 3
As shown in FIG. 1, a pedal 16 is rotatably mounted on the lower end of the pedal 5 with an axis as a fulcrum, as in the conventional case.
The lower end of the pedal 7 is pin-connected, and the upper end of the pedal connecting rod 17 is pin-connected to a lever 19 of a pedal sensor 18 provided in the electrical box 22. Therefore, the lever 19 is operated via the pedal connecting rod 17 by depressing the pedal 16, whereby the driving speed of the motor 24 is controlled.

In the sewing machine driving device 20 configured as described above, the motor 24 is mounted on the motor support portion 23 of the electrical box 22 fixed to the table 3 of the sewing machine.
As a result, the motor base, which was conventionally required, is no longer necessary, thereby reducing the number of parts and reducing the number of parts required. The driving device itself can be made compact.

Further, even if the motor 24 is moved to adjust the height position of the motor 24 by the adjusting means 25, the electric box 22 is fixed to the table 3 and does not move. It is not necessary to perform an adjustment operation of the electric box system such as adjusting the length of the pedal connection rod 17 connected to the pedal sensor 18 of the electric box 22 and adjusting the pedal depression angle. Also, unlike the conventional case, since the electrical box 22 is not hung on the motor 24,
A large force is not required to move the motor 24 to adjust the height position of the motor 24. In addition, since the electric box 22 does not move even when the motor 24 is moved, a space for moving the electric box, which is conventionally required, is not required. Therefore, it is possible to solve the problem of the installation space of the sewing machine and the problem of the deterioration of the operability, which are caused by the movement of the electrical box together with the motor.

Further, since the motor 24 is supported and integrated with the electric component box 22, the number of parts can be reduced as compared with the conventional case, and the set-up property can be improved.

[0036]

As described above, according to the first aspect of the present invention,
In the sewing machine drive device, the electrical box is supported on the table of the sewing machine, and the motor is mounted on the electrical box.Therefore, the motor base and the mounting bracket, which were required in the past, are not required, thereby reducing the number of parts. Therefore, the cost can be reduced, and the cost can be reduced. Further, since the electrical box can reduce the influence of the vibration of the motor as compared with the related art, there is an effect that the durability of the electrical box is extremely improved.

According to a second aspect of the present invention, there is provided a driving device for a sewing machine.
In the above, since the electric box is provided with adjusting means for adjusting the position of the motor, the electric box is fixed to the table even if the motor is moved in order to adjust the position of the motor by the adjusting means. Since there is no movement, there is no need to perform adjustment work for the electrical box system. Also, unlike the conventional motor, since the electrical box is not hung on the motor, a large force is not required to move the motor for adjusting the height position of the motor,
The adjustment operation can be easily performed with a small force.

Further, since the electric box does not move even when the motor is moved, the space for moving the electric box, which has been conventionally required, is not required. Therefore, it is possible to solve the problem of the installation space of the sewing machine and the problem of the deterioration of the operability, which are caused by the movement of the electrical box together with the motor.

According to a third aspect of the present invention, there is provided a driving device for a sewing machine.
In 2 or 2, since the pulley of the motor is arranged on the right side of the electrical box, the electrical box can be arranged below the sewing machine, and the sewing machine table of the sewing machine can be extended to the right to extend the electrical box. There is no need to mount the drive unit, so that the drive unit itself can be made compact. Also, by disposing the motor pulley on the right side of the electrical box, the electrical box is relatively located on the left side of the pulley, and thus the pedal is also located on the left side. The sewing machine can be arranged below the needle of a certain sewing machine, and the operability of the sewing machine pedal in the sewing operation can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an entire sewing machine including a sewing machine driving device according to the present invention.

FIG. 2 is a right side view of an example of a driving device of the sewing machine according to the present invention.

FIG. 3 is a front view of the same driving device.

FIG. 4 is a left side view of the driving device.

FIG. 5 is a side view showing an example of a conventional sewing machine driving device.

6 is a side view showing the entire sewing machine including the sewing machine driving device shown in FIG. 5, and showing a state in which a motor is set at a lowermost position.

FIG. 7 is a side view showing a state where the motor is set at an uppermost position.

[Explanation of symbols]

 3 Sewing machine table 20 Sewing machine driving device 22 Electrical box 24 Motor

Claims (3)

[Claims] 1. A sewing machine driving apparatus comprising: a motor for driving a sewing machine; and an electric box for controlling the motor, wherein the electric box is supported on a table of the sewing machine,
A drive device for a sewing machine, wherein the motor is attached to the electrical box. 2. The drive device for a sewing machine according to claim 1, wherein the electric box is provided with adjusting means for adjusting a position of the motor. 3. The drive device for a sewing machine according to claim 1, wherein a pulley of the motor is disposed on a right side of the electrical box.