JP2000262788A - Frame driving mechanism for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple structure to reduce the number of pieces of parts, and the trouble in assembling, adjustment and the like. SOLUTION: A frame driving mechanism 1 of a sewing machine comprises a rail basis extending in the longitudinal direction of the sewing machine, the rails 8, 9 mounted on the rail basis 7, a rear slide portion 10 and a front slide portion 11 simultaneously slidably supported on the rails 8, 9, and a slide driving mechanism 13 for longitudinally sliding and moving both slide portions 10, 11. The rail basis 7 is an integrally formed matter continuously extending in the longitudinal direction of the sewing machine, and the supporting rails 8, 9 respectively supporting the rear slide portion 10 and the front slide portion 1 are mounted on the rail basis 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame drive mechanism for driving a drive frame of a sewing machine.

[0002]

2. Description of the Related Art A frame drive mechanism of a sewing machine moves a drive frame disposed substantially horizontally above a machine frame in a horizontal plane. For example, as shown in FIGS. The mechanism 50 includes a pair of X-direction drive mechanisms 51 and a pair of Y-direction drive mechanisms 52 that move the drive frame 66 in the X and Y directions below the sewing head 67, respectively.

The Y-direction driving mechanism 52 includes a channel-shaped rear rail base 54 and a front rail base 55 extending substantially in the Y direction and supported substantially horizontally by the machine frame 53. The rail bases 54 and 55 are arranged in a line in front and rear. Each of the rail bases 54 and 55 includes a pair of rails 56 extending in the Y direction and fixed to the inner surfaces thereof.
A concave groove 56a is formed on the surfaces facing each other.

A rear slide portion 57 and a front slide portion 58 are respectively supported on the rail bases 54 and 55 so as to be slidable along the rail 56 in the Y direction. The two slide portions 57 and 58 are connected by a connection plate 59 so as to slide at the same time. Each slide part 57,
Reference numeral 58 includes a plate-shaped slide portion main body 60, a transmission member 68 fixed to the upper surface side, and a plurality of rollers 61 provided on the lower surface side of the slide portion main body 60. Transmission member 6
8 has a roller 68a provided at the upper end thereof so as to be rotatable in a horizontal plane, and the drive frame 66 is supported by the respective slide portions 57 and 58 so as to be relatively slidable via the roller 68a. . Further, each roller 61 is engaged with a concave groove 56 a of the rail 56 at a peripheral portion thereof in a rollable state.

A pair of pulleys 62 and 63 are rotatably provided at the front and rear ends of the rear rail base 54.
Is wound around a drive belt 64. Each end of the drive belt 64 is connected to the front and rear of the rear slide portion 57, respectively. A motor 65 for driving the pulley 62 is connected to the pulley 62, and the rear slide portion 57 and the front slide portion 58 move in the Y direction according to the rotation direction of the motor 65.

[0006] The X-direction drive mechanism 51 mainly has no front rail base 55 and front slide portion 58;
It differs from the Y-direction drive mechanism 52 only in that the rear slide portion 57 of one X-direction drive mechanism 51 is connected to the rear slide portion 57 of the other X-direction drive mechanism 51.

[0007]

However, in the Y-direction drive mechanism 52, the rear slide portion 57 and the front slide portion 58 are separated from each other by a machine frame 53 via a rear rail base 54 and a front rail base 55, respectively. Therefore, both rail bases 54 and 55 must be attached to the machine frame 53 and their positions must be adjusted so that they are aligned.

Further, each rail base 54, 55 and each slide portion 57, 58 are composed of a pair of rails 56 provided on each rail base 54, 55 and a plurality of rails provided on each slide portion 57, 58. Since it is configured to be relatively slidable by engagement with the rollers 61, the number of components is large, and mounting and adjustment of each component is troublesome.

Further, since each of the rail bases 54 and 55 is formed in a channel shape whose upper side is open, there is the following problem. (1) In order to reliably support the weights of the slide portions 57, 58 and the drive frame 66, for example, the rail bases 54, 5
The bottom wall and the side wall of 5 must be formed thicker and a reinforcing member must be attached, which increases the weight of the sewing machine and takes time to attach. (2) Lint enters the rail bases 54 and 55 from the upper opening, and tends to accumulate. For this reason, accumulated lint must be cleaned, and maintenance is troublesome.

An object of the present invention is to provide a frame drive mechanism which solves the above-mentioned problems, has a simple structure, and can reduce the number of parts and labor for assembling and adjusting.

[0011]

To achieve the above object, a frame drive mechanism of a sewing machine according to the present invention comprises a rail base extending in the front-rear direction of the sewing machine, a rail mounted on the rail base, and a rail mounted on the rail base. A rear slide unit and a front slide unit that are simultaneously slidably supported, and a slide drive mechanism that slides the two slide units back and forth, and that drives a drive frame of the sewing machine through the two slide units. In the frame drive mechanism, the rail base is an integral product extending in the front-rear direction of the sewing machine without being cut in the middle thereof, and a rail supporting the rear slide portion and the front slide portion is attached to the rail base. I have.

The rail base includes at least a pair of support portions that stand apart from each other in the width direction of the rail, and an upper wall portion supported by the support portions, and the slide drive mechanism is configured to have a length of the rail. A pair of pulleys provided at intervals in the vertical direction, and wound around the two pulleys via a lower side of the upper wall portion, and both ends of the rear slide portion above the upper wall portion. Alternatively, a mode including a drive belt connected to the front slide portion and formed in a loop shape can be exemplified.

The frame driving mechanism for a sewing machine according to the present invention further comprises a rail base extending in the front-rear direction of the sewing machine, a rail mounted on the rail base, a slide part slidably supported by the rail at the same time, A slide drive mechanism for slidingly moving the slide part back and forth, wherein the frame base of the sewing machine drives the drive frame of the sewing machine via the slide part, wherein the rail base is spaced apart in the width direction of the rail. The slide drive mechanism includes at least one pair of support portions that stand, and an upper wall portion supported by the support portion, wherein the slide drive mechanism includes a pair of pulleys that are provided at intervals in a length direction of the rail; A drive belt that is wound around the pulleys via a lower side of the section, and has both ends connected to the slide section above the upper wall section in a loop shape. It is characterized in that.

In the above, the rail base is not particularly limited, but the following embodiments can be exemplified. (1) An aspect formed in a cylindrical shape. (2) An aspect formed in an inverted channel shape. (3) An aspect formed in an H-shaped cross section. (4) An embodiment comprising a plurality of columns and an upper wall supported by the columns.

The rail is not particularly limited, but may be a monorail.

[0016]

1 to 5 show a frame driving mechanism 1 of a sewing machine according to an embodiment of the present invention.
Moves the drive frame 3 disposed substantially horizontally above the machine frame 2 in a horizontal plane below the sewing machine head 4, and moves the drive frame 3 in the X direction (left and right directions of the sewing machine) shown in FIG. A pair of X-direction drive mechanisms 5 and a pair of Y-direction drive mechanisms 6 for moving in the Y direction (the front-back direction of the sewing machine) are provided.

As shown in FIGS. 2 to 4, the Y-direction drive mechanism 6 includes a rail base 7 extending in the Y direction, and a rail base 7.
Rails 8 and 9 mounted on the vehicle, a rear slide portion 10 and a front slide portion 11 slidably supported by the rails 8 and 9 simultaneously, and a slide drive for sliding the slide portions 10 and 11 back and forth. And a mechanism 14.

The rail base 7 is supported substantially horizontally on the machine frame 2 and is an integral product that extends in the front-rear direction of the sewing machine without cutting along the way. The rail base 7 includes a pair of support portions 7b that stand at intervals in the width direction of the rails 8 and 9.
And an upper wall portion 7c supported by the support portion 7b. The rail base 7 is provided on the upper wall 7c of the rail base 7 at a substantially middle portion in the length direction (Y direction).
Is provided with an opening 7a that communicates with the inside. A guide groove 7d extending in the Y direction across the opening 7a is formed on the upper surface of the upper wall 7c of the rail base 7, and the guide groove 7d has
A single rail 8, 9 extending in the direction is attached. That is, the main rails 8 and 9 are monorails. The rails 8 and 9 have recesses 23 formed on both side walls thereof, extending in the length direction of the rails 8 and 9.

Rear slide part 10 and front slide part 1
1 is supported on the rail base 7 so as to be slidable in the Y direction along the rails 8 and 9, respectively. Both slides 1
The reference numerals 0 and 11 are connected by a connecting plate 12 so as to slide at the same time. Each slide part 10, 11
It has a plate-shaped slide portion main body 15, a transmission member 16 fixed to the upper surface side thereof, and a slider 17 fixed to the lower surface side of the slide portion main body 15. The transmission member 16 has a roller 16a provided at the upper end thereof so as to be rotatable in a horizontal plane, and the drive frame 3 is supported by the slide portions 10 and 11 so as to be relatively slidable via the roller 16a. ing. A groove 17a is formed on the lower surface side of the slider 17, and rails 8 and
A projection 24 is formed to engage with the recess 23 of the ninth. Accordingly, the groove 17a of the slider 17 is not slid over the rails 8, 9 and slidably moves.
Is adapted to be engaged.

The slide drive mechanism 14 includes a pair of pulleys 18 and 19 rotatably provided at the rear end of the rail base 7 and inside the opening 7a, and inside the rail base 7 (below the upper wall 7c). The drive belt 20 is wound around the pulleys 18, 19 via a pair of loops, and the both ends of the drive belt 20 are connected to the front and rear of the rear slide portion 10 above the upper wall portion 7 c to form a loop. And a motor 21 connected to the pulley 18 at the rear end. And the motor 21
The rear slide portion 10 and the front slide portion 11 move in the Y direction according to the rotation direction of.

The X-direction drive mechanism 5, as shown in FIG.
Mainly, the opening 7 of the rail base 7 in the Y-direction drive mechanism 6
a that the rail base 13 is omitted from the front side of FIG. a, the point that the rail 9 and the front slide part 11 are not provided, and the slide part 26 of one X-direction drive mechanism 5.
This is different from the Y-direction drive mechanism 6 only in that a (corresponding to the rear slide section 10 of the Y-direction drive mechanism 6) is connected to the slide section 26 of the other X-direction drive mechanism 5.

According to the frame driving mechanism 1 of the sewing machine configured as described above, the rail base 7 of the Y-direction driving mechanism 6 is formed as an integral product that extends in the front-rear direction (Y direction) of the sewing machine without being cut in the middle thereof. Unlike the prior art, it is not necessary to attach the two rail bases to the machine frame and adjust the positions so that they are aligned. For this reason, the number of parts and the labor of assembly and adjustment can be reduced.

The rail bases 7 and 13 in the X-direction drive mechanism 5 and the Y-direction drive function 6 and the slide portions 10 and
11 is relatively slidable by engagement of a single rail 8, 9 provided on the rail bases 7, 13 with a slider 17 provided on the slide portions 10, 11, so that it can be relatively slid. The structure is simple, and the number of parts and the labor for assembly and adjustment can be reduced.

Further, the rail bases 7 and 13 in the X-direction drive mechanism 5 and the Y-direction drive function 6 are provided with at least one pair of support portions 7b that stand at intervals in the width direction of the rails 8 and 9.
And the upper wall portion 7c supported by the support portion 7b, so that sufficient strength can be ensured even if the wall thickness is made thinner than in a conventional case formed in a channel shape with an open upper side. Therefore, unlike the related art, there is no increase in the weight of the sewing machine, and there is no need for a reinforcing member, and no troublesome installation is required. Moreover, the rail base 7,1
In No. 3, since the upper side is not open, unlike the conventional case, the lint is less likely to enter the inside, and the maintenance work can be reduced.

The present invention is not limited to the configuration of the above-described embodiment. For example, the present invention can be embodied with the following modifications without departing from the spirit of the invention.

(1) Two or more rails 8 and 9 are required. (2) Rails 8 and 9 are connected to rail base 7 (or rail base 1).
3) Support by the support portion 7b.

(3) The slide structure formed by the rails 8 and 9 and the slider 17 is changed to another slide structure.

(4) The sectional shapes of the rail bases 7 and 13 are appropriately changed. (5) The structure of the slide drive mechanism 14 of the slide units 10 and 11 is appropriately changed.

[0029]

As described above in detail, according to the frame driving mechanism of the sewing machine according to the first to fifth aspects of the present invention, the structure is simple,
An excellent effect is achieved in that the number of parts and the labor for assembling and adjusting can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a frame driving mechanism of a sewing machine according to an embodiment of the present invention.

FIG. 2 is a plan view showing a Y-direction driving mechanism of the frame driving mechanism.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a side sectional view similar to FIG. 3, showing an X-direction drive mechanism of the frame drive mechanism.

FIG. 6 is a plan view showing a frame drive mechanism of a conventional sewing machine.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame drive mechanism 3 Drive frame 7 Rail base 7b Support part 7c Upper wall part 8 Rail 9 Rail 10 Rear slide part 11 Front slide part 13 Rail base 14 Slide drive mechanism 18 Pulley 19 Pulley 20 Drive belt 26 Slide part

Claims (5)

[Claims] 1. A rail base extending in the front-rear direction of a sewing machine, a rail attached to the rail base, a rear slide part and a front slide part supported simultaneously slidably on the rail, and both slide parts. A frame drive mechanism for a sewing machine that drives a drive frame of the sewing machine through the two slide portions, wherein the rail base extends in the front-rear direction of the sewing machine without being cut in the middle thereof. A frame drive mechanism for a sewing machine, wherein a rail supporting the rear slide portion and the front slide portion is attached to the rail base as an integral product. 2. The rail base includes at least a pair of support portions that stand at intervals in a width direction of the rail, and an upper wall portion supported by the support portions, wherein the slide drive mechanism includes: A pair of pulleys provided at intervals in the length direction, and wound around the pulleys via a lower side of the upper wall portion, and both ends of the pulley are located above the upper wall portion at the rear side. 2. The frame drive mechanism for a sewing machine according to claim 1, further comprising: a slide portion or a drive belt connected to the front slide portion and formed into a loop. 3. A rail base extending in the front-rear direction of the sewing machine, a rail attached to the rail base, a slide part simultaneously slidably supported by the rail, and a slide drive for sliding the slide part back and forth. A frame driving mechanism for driving a driving frame of the sewing machine via the slide portion, wherein the rail base has at least a pair of support portions that stand at intervals in the width direction of the rail; An upper wall portion supported by a portion, wherein the slide drive mechanism includes a pair of pulleys provided at intervals in a length direction of the rail, and the two via a lower side of the upper wall portion. A frame-driven driving machine, comprising: a driving belt wound around a pulley and having both ends connected to the slide portion above the upper wall portion in a loop shape. . 4. The frame drive mechanism for a sewing machine according to claim 2, wherein the rail base is formed in a cylindrical shape. 5. The frame drive mechanism for a sewing machine according to claim 1, wherein the rail is a monorail.