JPH06142379A - Needle case supporting device of multineedle type sewing machine - Google Patents

Abstract

PURPOSE:To omit the adjustment of a position of an arm part on which a needle case is mounted in a needle case supporting device of a multineedle type sewing machine. CONSTITUTION:A vertical eccentric pin member 28 pivotably attached to a pair of support members 25 fixed to a slide rail 23 movably supported on the front end of an arm part is formed. A pair of horizontal mounting plates 7a provided integrally on both left and right sides near the upper end of a needle case 7 are formed with a vertical pin hole 7c in which the eccentric pin member 28 is fitted from above so that a pair of mounting plates 7a are fixedly mounted on the support member 25 respectively. The front and rear positions for mounting the needle case at the left and right sides can be independently adjusted so that the respective needle locations of a pluralty of needles are set to regular needle locations by pivoting the eccentric pin member 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle bar case supporting device for a multi-needle type sewing machine, and in particular, a needle bar case having a plurality of needle bars is attached to the front end of an arm portion so that the mounting position can be adjusted. It is about things.

[0002]

2. Description of the Related Art Conventionally, a needle bar case having a plurality of needle bars is arranged at the front end portion of a sewing machine arm in a row direction of the needle bars so that a colorful embroidery pattern can be sewn by combining embroidery threads of a plurality of colors. A multi-needle type embroidery sewing machine that is supported so as to be horizontally movable is in practical use. By the way, generally, the needle bar case is unitized, and the unitized needle bar case is configured to be supported by an arm portion so as to be movable in the left-right direction. For example, Japanese Patent Publication Sho 57-
In Japanese Patent No. 53751, a needle bar case in which a plurality of needle bars are arranged in a row is constructed such that a horizontal moving rail fixed to the upper end portion and extending in the left-right direction is slid on a fixed rail attached to an upper portion of a front end portion of an arm portion. While being slidably supported via rollers, a horizontal movable rail fixed to the lower end of the needle bar case and extending in the left-right direction is supported via a rotating roller rotatably supported at the lower part of the front end of the arm portion. A needle bar case supporting device of a multi-needle type sewing machine configured as described above is described.

[0003]

However, in the needle bar case supporting device of the multi-needle type sewing machine described in the above Japanese Patent Publication No. 57-53751, the needle bar case with its upper part and lower part is attached to the arm part. Although it is supported so that it can move in the left-right direction, due to assembly errors when assembling this needle bar case as a unit, when mounting the needle bar case to the front end of the arm part, Even if the needle drop position of does not become the regular needle drop position,
There is a problem that the mounting position cannot be adjusted so as to eliminate the assembly error, and the mounting position of the needle bar case cannot be adjusted. Furthermore, the needle bar case is often removed for maintenance or inspection, and the mounting position must be adjusted each time the removed needle bar case is mounted, which requires a great deal of labor and time. is there.

The present invention has been made to solve the above problems, and an object thereof is to provide a needle bar case for a multi-needle type sewing machine in which adjustment of the mounting position when mounting the needle bar case to the arm can be omitted. To provide a supporting device.

[0005]

In order to achieve the above object, a needle bar case supporting device for a multi-needle type sewing machine according to a first aspect of the present invention comprises a needle bar case having a plurality of needle bars and a front end portion of an arm portion. And a pair of horizontal mounting plates integrally provided on both left and right side surfaces near the upper end of the needle bar case and movable to the front end of the arm part. Rail member supported by, and fixed to the rail member,
A pair of support members for fixing the pair of mounting plates of the needle bar case in a mounted state, a vertically oriented eccentric pin member rotatably mounted on each set of support members, and each set And a position adjusting mechanism including a vertically oriented pin hole which is formed on the mounting plate of the above and is fitted into the eccentric pin member from above.

[0006]

In the needle bar case supporting device for a multi-needle type sewing machine according to claim 1, which has the above structure, a pair of horizontal mounting plates integrally provided on both left and right side surfaces near the upper end of the needle bar case. Are fixed in a state of being respectively placed on a pair of support members fixed to a rail member movably supported on the front end portion of the arm portion. At this time, a position adjusting mechanism is provided on each of the mounting plate and the supporting member of each set, and the position adjusting mechanism is formed on the mounting plate and a vertically oriented eccentric pin member rotatably mounted on the supporting member. The vertical eccentric pin member is fitted into the eccentric pin member from above. Therefore, in each position adjusting mechanism, by rotating the eccentric pin member in the clockwise direction or the counterclockwise direction, each needle drop position of the plurality of needle bars becomes a normal needle drop position. The front and rear mounting positions on the left and right sides of the case can be adjusted independently. Moreover, if the rotational position of the eccentric pin member of these position adjusting mechanisms is determined during the trial run, the position of the pin hole that engages with the eccentric pin member from above is determined, so maintenance and inspection, etc. Adjustment of the mounting position when mounting the removed needle bar case to the arm can be omitted.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a multi-needle type embroidery sewing machine provided in a multi-head type embroidery machine. The multi-head embroidery machine M will be described. As shown in FIG. 1, a sewing machine support plate 2 having a substantially rectangular shape in a plan view and having a predetermined length in the left-right direction is provided on a rear side of an upper surface of a base frame 1 extending in the left-right direction. On the sewing machine support plate 2, three multi-needle type embroidery sewing machines MH1 to MH3 are arranged side by side in the left-right direction at predetermined intervals. These embroidery sewing machines MH1 to MH
At the front end portion of the arm portion 3 of No. 3, 12 needle bars 12 arranged in a row in the left-right direction are vertically movably supported, and 12 needle bars 9 are oscillatably supported. Case 7
Are respectively supported by an upper support mechanism (corresponding to a needle bar case support device of the present invention) 20 and a lower support mechanism 30 described later so as to be horizontally movable.

On the other hand, the bed body 5 at the lower end of the pillar 4 connected to the arm 3 is mounted on the sewing machine support plate 2,
A cylinder bed 6 extends forward from the front end of the bed body 5, and a thread catcher (not shown) is provided at the tip of the cylinder bed 6 and a sewing needle 8 attached to a selected needle bar 12 is provided. In cooperation with the above, the seam is formed on the work cloth with the embroidery thread of a desired color. Here, an upper shaft 18 (see FIG. 3) for vertically moving the needle bar 12 and the balance 9 and a lower shaft (not shown) for rotating the thread catcher are V-belts connected to a sewing machine motor (not shown). It is driven by a drive shaft 11 which is rotationally driven by 10.

Further, a work table 13 is disposed so as to be flush with the upper surface of the cylinder bed 6 on the front side of the sewing machine support plate 2, and the work table 13 is included.
A movable frame 16 having a rectangular shape in a plan view extending in the left-right direction is placed over the pair of auxiliary tables 14 and 15 provided on the left and right sides of the work table 13. Then, the drive frame portion 16a at the right end portion of the movable frame 16 is moved and driven in the X axis direction (horizontal direction) by the X axis drive mechanism (not shown), and the drive frame portion 16b at the left end portion and the drive frame portion 16b are also driven. The portion 16a and the portion 16a are simultaneously moved and driven in the Y-axis direction (front-back direction) by a Y-axis drive mechanism (not shown). Therefore, the movable frame 1
6 is movable on the XY plane by these X-axis drive mechanism and Y-axis drive mechanism.

Next, the upper support mechanism 20 for supporting the upper end portion of the needle bar case 7 on the front end portion of the arm portion 3 will be described with reference to FIGS. 3, 4 and 6. However, since the upper support mechanism 20 that supports the needle bar case 7 on each of the embroidery sewing machines MH1 to MH3 is the same, the upper support mechanism 20 provided on the central embroidery sewing machine MH2 will be described. A base plate 21 is fixed to the upper surface of the front end portion of the arm portion 3, and a pair of guide blocks 22 are mounted on the base plate 21. As shown in FIG. 6, slide rails (corresponding to the rail member of the present invention) 23 extending in the left-right direction and having V-shaped grooves 23a formed on both front and rear end surfaces are engaged with each other so as to be movable in the left-right direction. . The slide rail 23 includes a pair of left and right support members 24, which extend in the front-rear direction.
The vicinity of the front end of 25 is fixed. The needle bar case 7
Is a substantially inverted L-shape when viewed from the side, and the horizontal mounting plates 7a integrally formed on the left and right side surfaces near the upper end of the horizontal mounting plate 7a are mounted on the support members 24 and 25 by the mounting bolts 26, respectively. It is fixed.

By the way, as shown in FIG. 6, vertically extending pin holes 7c are formed between the slide rails 23 and the rear mounting bolts 26 on the pair of mounting plates 7a. On the other hand, a vertical eccentric pin member 28 fitted in the pin hole 7c is screwed to each of the support members 24 and 25 on which the mounting plate 7a is placed and fixed by a nut member 29. . In this eccentric pin member 28, a head portion 28a that fits into the pin hole 7c with respect to the shaft portion on which the screw is formed.
Is eccentric. Here, the position adjusting mechanism 27 is configured by the pin holes 7c formed in the left and right sets of the mounting plates 7a and the eccentric pin member 28 screwed to the support members 24 and 25, respectively. Therefore, in each position adjusting mechanism 27, both mounting bolts 26 are loosened and nut members 29 are loosened,
When the eccentric pin member 28 is rotated clockwise or counterclockwise in plan view, the mounting plate 7a is supported via the position adjusting mechanism 27 along with the eccentric movement of the head 28a. The position can be adjusted in the front-back direction with respect to 25.

Next, a lower support mechanism 30 for supporting the lower end of the needle bar housing 7b of the needle bar case 7 on the front end of the arm 3.
Will be described with reference to FIG. However, since the lower support mechanism 30 that supports the needle bar case 7 on each of the embroidery sewing machines MH1 to MH3 is the same, the lower support mechanism 30 provided on the central embroidery sewing machine MH2 will be described. As shown in FIG. 4, the needle bar accommodating portion 7b has a hook portion 31a formed on the lower end portion thereof over the entire width in the left-right direction.
A character-shaped engaged member 31 is attached. An engaging member 32, which is substantially L-shaped in side view and engages with the hook portion 31a from the front side (the side opposite to the arm portion), is attached to the lower end portion of the arm portion 3 with a screw 33, as shown in FIG. Has been.

On the other hand, a vertically oriented pivot pin 35 to which an eccentric sleeve 34 is fixed is rotatably pivoted to the lower end of the arm portion 3 via a spacer 36, and this eccentric sleeve 3
A roller member 37, which comes into contact with the hook portion 31a from the rear side (the side of the arm portion 3), is externally fitted to 0. Therefore, when the screw 33 is loosened and the nut member 38 fixed to the pivot pin 35 is rotated clockwise or counterclockwise in a plan view, the pivot pin 35 is rotated to cause the eccentric sleeve 34 to intervene. The roller member 37 will move eccentrically. As a result, the position of the engaged member 31, which comes into contact with the roller member 37 from the front side, can be moved by a minute distance. As a result, the position of the lower end of the needle bar case 7 in the front-rear direction can be finely adjusted.

Next, the operation of finely adjusting the mounting position of the needle bar case 7 by the pair of left and right position adjusting mechanisms 27 will be described. However, it is assumed that the slide rail 23 is adjusted so as to be orthogonal to the arm portion 3.
In each of the position adjusting mechanisms 27, first, the mounting bolts 26 are loosened and the nut member 29 is loosened. Then, the eccentric pin member 28 of the left support member 24 is rotated clockwise or counterclockwise in plan view to rotate the head 28.
eccentrically move a. As a result, the left side of the needle bar case 7 is positionally adjusted in the front-rear direction via the left side position adjusting mechanism 27, so that the leftmost needle bar 1 of the 12 needle bars 12 is adjusted.
Finely adjust the needle drop position of 2.

Similarly, the eccentric pin member 28 of the right supporting member 25 is rotated clockwise or counterclockwise in plan view to eccentrically move the head portion 28a, and the right position adjusting mechanism 27 is used. Since the right side of the needle bar case 7 is adjusted in the front-rear direction, the needle drop position of the rightmost needle bar 12 of the 12 needle bars 12 is finely adjusted. After that, all the mounting bolts 26 and both nut members 29 are tightened. At this time, since the lower support mechanism 30 is configured to support the lower part of the needle bar case 7 by so-called point support in which the roller member 37 is brought into contact with the engaged member 31, as described above, both positions are supported. The needle bar case 7 is adjusted so that the needle drop positions of all the needle bars 12 become regular needle drop positions via the adjusting mechanism 27.
The mounting positions in the front-rear direction on the left and right sides can be adjusted independently. Moreover, the eccentric pin member 2 of the position adjusting mechanism 27 including the assembly error of the needle bar case 7 and the like.
If the rotation position of 8 is determined at the time of test operation, the position of the pin hole 7c fitted to the eccentric pin member 28 from above, that is, the attachment position of the needle bar case 7, is determined, so maintenance and inspection, etc. It is possible to omit the adjustment of the attachment position when attaching the needle bar case 7 removed in step 3 to the arm portion 3.

By the way, as shown in FIG. 2, the arm portion 3 of the embroidery sewing machine MH2 located at the center is provided with a needle bar switching mechanism 40 for moving the needle bar case 7 in the left-right direction. Next, regarding the needle bar switching mechanism 40,
A description will be given based on FIGS. 2, 3 and 5. A screw mounting plate 41 extending in the left-right direction is fixed to the rear ends of the pair of support members 24 and 25 with screws.
As shown in FIG. 5, twelve engagement bolts 42 corresponding to twelve needle bars 12 are provided at a pitch similar to the pitch between the needle bars 12, and are fixed by nuts 43. A support frame 44, which is substantially U-shaped in a plan view, is fixed to the arm portion 3 immediately behind the screw mounting plate 41. A rotation shaft 45 oriented in the left-right direction is rotatably supported by the support frame 44, and the bolt 4 is attached to the rotation shaft 45.
The spiral cam 46 that can be engaged with 2 is fixed, and the bevel gear 47 is fixed.

On the other hand, on the rear side of the support frame 44, a needle bar switching motor 48 composed of a stepping motor is attached in a forward direction, and a drive shaft 49 of the motor 48 extends through the support frame 44 and extends forward. A bevel gear 50 that meshes with the bevel gear 47 is fixed to the tip of the shaft 49. Therefore, when the needle bar switching motor 48 is driven in the normal direction or in the reverse direction, the bevel gear 47 is simultaneously rotated by the rotation of the bevel gear 50, and the spiral cam 46 is simultaneously rotated right or left. The bolt 42 that engages with the cam 46 moves to the left or right. This gives 1
The needle bar 12 of the book is selectively selected so that the embroidery stitch can be formed on the work cloth with the embroidery thread of a desired color.

Next, a connecting mechanism 55 for operatively connecting the needle bar case 7 of the embroidery sewing machine MH2 provided with the needle bar switching mechanism 40 with the needle bar case 7 of the other embroidery sewing machines MH1 and MH3 will be described with reference to FIG. -It demonstrates based on FIG. 3 and FIG. The right supporting member 25 of the pair of supporting members 24, 25 provided on each of the three embroidery sewing machines MH1 to MH3
As shown in FIG. 3, a connecting member 56 having a pair of connecting portions 56a is attached to the. A connecting shaft 57 is arranged in the left-right direction through the three connecting members 56, and is fixed to the connecting shaft 57 at these connecting portions 56a. Therefore, as the needle bar case 7 of the embroidery sewing machine MH2 moves in the left-right direction, the connecting shaft 57
Move integrally in the left-right direction, so that the other needle bar cases 7 are simultaneously moved in the left-right direction. That is, these three needle bar cases 7 are synchronously and integrally moved in the left-right direction.

A needle bar vertical drive mechanism 60 for vertically driving the needle bar 12 will be briefly described with reference to FIG. A base needle bar 61 extending in the vertical direction is provided at the front end of the arm portion 3, and the base needle bar 61 is supported by the machine frame F at its upper end and lower end. This base needle bar 61
A cylindrical vertical movement member 62 is externally fitted on the
One end of a needle bar crank 64 is rotatably supported by a needle bar holder 63 connected to the vertical movement member 62. On the other hand, the upper shaft 18 arranged in the arm portion 3 in the front-rear direction.
A balance crank 65 is fixedly attached to the front end of the needle bar crank 64, and the other end of the needle bar crank 64 is rotatably supported by the balance crank 65. By the way, a connecting pin 66 is fixed to each of the twelve needle bars 12 at a middle portion in the height direction thereof, and the connecting pin 66 of the needle bar 12 and the vertical moving member 62 facing the vertical moving member 62. The rotary portion 62a is selectively engaged. Therefore, as the up-and-down moving member 62 moves up and down via the balance crank 65 and the needle bar crank 64 by the rotation of the upper shaft 18, the needle bar 12 moves up and down via the needle bar holder 63 and the connecting pin 66. It is driven back and forth.

The needle bar case may be constructed by arranging a plurality of needle bars 12 in an arc shape and pivotally supported on the front end of the arm section 3. The needle bar case 7 does not include the lower support mechanism 30, but does not include the upper support mechanism 20.
Of course, the present invention can be applied to a multi-needle embroidery sewing machine configured to be supported by the arm portion 3 alone.

[0021]

As described above in detail, according to the needle bar case supporting device of the multi-needle type sewing machine according to the first aspect, a pair of mounting plates horizontal to the left and right side surfaces near the upper end of the needle bar case. Is integrally provided, and a pair of support members fixed to a movably supported rail member is provided, and a position adjusting mechanism is provided on each of the mounting plate and the supporting member of each set. Therefore, in each position adjusting mechanism, By rotating the eccentric pin member in the clockwise direction or the counterclockwise direction, the needle drop positions of the needle bar cases can be adjusted to the normal needle drop positions in the front-rear direction. The mounting position can be adjusted independently. In addition, if the rotational position of the eccentric pin member of these position adjusting mechanisms is determined during the trial run, including the assembly error of the needle bar case, etc., the pin hole of the pin hole fitted to the eccentric pin member from above is determined. Since the position, that is, the mounting position of the needle bar case is determined, it is possible to omit adjustment of the mounting position when mounting the needle bar case removed for maintenance or inspection on the arm portion.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a multi-head embroidery machine.

FIG. 2 is a schematic plan view of a multi-head embroidery machine.

FIG. 3 is a vertical side view taken along the line AA of FIG. 2;

FIG. 4 is a schematic exploded perspective view of a needle bar case and a support mechanism.

FIG. 5 is an enlarged partial plan view of a main part of an embroidery sewing machine provided with a needle bar switching mechanism.

FIG. 6 is a vertical side view taken along the line BB-B of FIG.

[Explanation of symbols]

 MH1 to MH3 Multi-needle embroidery sewing machine 3 Arm part 7 Needle bar case 7a Mounting plate 7c Pin hole 20 Upper support mechanism 23 Slide rail 24 Support member 25 Support member 27 Position adjustment mechanism 28 Eccentric pin member

Claims (1)

[Claims] 1. A needle bar case supporting device for movably supporting a needle bar case having a plurality of needle bars on a front end portion of an arm portion, the needle bar case supporting device being integrated with both left and right side surfaces near a top end of the needle bar case. A pair of horizontal mounting plates, a rail member movably supported at the front end of the arm, and a pair of mounting plates for the needle bar case fixed to the rail member. A pair of support members for fixing in a mounted state, a vertically oriented eccentric pin member rotatably mounted on the support members of each set, and an eccentric pin formed on the mounting plate of each set. A needle bar case supporting device for a multi-needle sewing machine, comprising: a position adjusting mechanism including a vertically oriented pin hole that fits into a member from above.