JP2579686Y2 - Needle bar case support device of multi-needle sewing machine - Google Patents

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 sewing machine, and more particularly to a needle bar case having a plurality of needle bars, which is mounted on a front end of an arm so as to be adjustable in mounting position. 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 a front end 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 embroidery sewing machine which is supported so as to be movable in a horizontal direction is in practical use.

In general, a needle bar case is formed as a unit, and the unitized needle bar case is supported by a support device at the tip of an arm portion so as to be movable in the row direction of the needle bar. It is configured as follows. Note that the row direction of the needle bars is a left-right direction when an operator faces the arm portion so as to be orthogonal to the arm portion, and the direction is hereinafter simply referred to as a left-right direction. In addition, a direction orthogonal to the horizontal direction in the horizontal plane,
That is, the direction in which the arm portion extends in the horizontal plane is defined as the front-back direction.

[0004] For example, in Japanese Patent Publication No. 57-53751, a plurality of needle bars are arranged in a row in the left-right direction of an arm portion in a needle bar case. Moving rails extending horizontally in the same direction as the arrangement direction of the needle bars are fixed in parallel with each other. Further, the moving rail at the upper part of the needle bar case is slidably supported via a slide roller on a fixed rail attached to the upper part of the front end of the arm part, while the moving rail at the lower part of the needle bar case is connected to the arm part. A needle bar case supporting device of a multi-needle sewing machine configured to be supported via two rotatable rotating rollers below a front end of the sewing machine is described.

[0005]

However, in the needle bar case supporting device of the multi-needle sewing machine described in Japanese Patent Publication No. 57-53751, the mounting error when the fixed rail or the rotating roller is mounted on the arm portion. By
When the sliding surface of the fixed rail of the arm portion and the support surface of the rotating roller are attached to be shifted in the front-rear direction of the arm portion,
Since the parallelism between the sliding surface of the arm portion and the supporting surface is not sufficient, the moving direction of the supported surface of the needle bar case by the sliding surface of the fixed rail and the needle by the supporting surface of the rotating roller. Since the moving direction of the supported surface of the bar case does not match, the needle bar case is twisted, the moving direction and the stop position of the needle bar case are different from the expected directions, and the needle bar position is shifted, which may cause sewing errors. There is. Further, if the needle bar case is significantly twisted, the needle bar case may not be able to move.

Further, the distance between the sliding surface of the fixed rail of the arm portion and the upper sliding surface of the support surface by the rotating roller is narrower or wider than a predetermined size for supporting the needle bar case, and thus is accurately determined. If it is not set, the needle bar case may not fit into the gap and cannot be assembled to the arm portion, or the needle bar case may rattle and generate vibration, resulting in sewing errors. If the upper sliding surface and the lower supporting surface of the needle bar case are inclined, the two surfaces do not have parallelism with each other, so that the distance between the two surfaces is narrower or wider than a predetermined dimension. Similarly, the needle bar case may not be able to be assembled to the arm portion, or sewing error may occur.

Therefore, in order to accurately set the needle drop point and assemble the needle bar case to the arm, the upper sliding surface of the arm and the lower supporting surface are exactly parallel to each other.
In addition, an adjustment operation for adjusting a mounting position of a fixed rail, a rotating roller, or the like must be performed so that a distance between the sliding surface and the support surface is a predetermined distance for supporting the needle bar case. There is a problem that much labor and time are required for the adjustment work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a needle bar case support for a multi-needle sewing machine which can simplify the operation for attaching a needle bar case to an arm portion. It is to provide a device.

[0009]

In order to achieve this object, a needle bar case supporting device for a multi-needle sewing machine according to the first aspect of the present invention is provided on a needle bar case, and is provided in a horizontal direction in a row direction of the needle bars. Movably, including a rail member supported at the front end of the arm portion, and an end support mechanism that supports a portion near one of the upper and lower ends of the needle bar case via the rail member;
An engaged member provided at one of the upper and lower ends of the needle bar case over substantially the entire width thereof, and a roller pivotally mounted rotatably about a vertical axis and abutting the engaged member from the side. The other end support mechanism includes a member and an engaging member that engages the engaged member from a side opposite to the roller member and causes the engaged member to contact the roller member.

According to a second aspect of the present invention, the needle bar case supporting device of the multi-needle sewing machine is a roller member which is a bearing eccentrically supported by a vertically extending rotatable and stoppable shaft. It has.

[0011]

In the needle bar case supporting apparatus for a multi-needle sewing machine according to the first aspect of the present invention, one end of the needle bar case is supported by a one end supporting mechanism via a rail member. The rod can be moved horizontally in the row direction. The engaged member of the needle bar case is abutted from the side by the roller member, and is engaged by the engaging member from the opposite side, and the other end of the needle bar case is supported from both front and rear directions of the arm portion. You. Therefore, since the one end support mechanism and the other end support mechanism do not share a parallel portion and support the needle bar case, it is not necessary to obtain accurate parallelism and dimensions, and the needle bar case is not required to have an arm portion. Can be easily attached to

When the shaft is rotated, the amount of eccentricity between the shaft and the bearing with respect to the front end of the arm changes, and the engaging member is engaged with the engaged member. By the contact, the position of the point of action between the engaged member and the bearing can be changed in the front-rear direction of the arm portion. Therefore, the sewing position can be adjusted by changing the position of the needle bar. Further, since the rotation can be performed by rotating the shaft, the position of the needle bar can be easily adjusted.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 embroidery sewing machine provided in a multi-head embroidery machine.

The multi-head embroidery machine M will be described.
As shown in FIG. 1, a base frame 1 extending in the left-right direction
A substantially rectangular sewing machine support plate 2 having a predetermined length in the left-right direction is provided on the rear side of the upper surface of the sewing machine. Three multi-needle embroidery sewing machines MH1 to MH3 are provided on the sewing machine support plate 2. They are arranged side by side at predetermined intervals in the left-right direction.

At the front end of the arm portion 3 of each of the embroidery sewing machines MH1 to MH3, 12
The needle bar case 7, which supports the needle bars 12 so as to be able to move up and down, and swingably supports the twelve balances 9, can be horizontally and horizontally moved by an upper support mechanism 20 and a lower support mechanism 30 which will be described later. Each is supported.

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 a front end of the bed body 5, and a thread catcher (not shown) is provided at a tip of the cylinder bed 6, and a sewing needle 8 attached to a selected needle bar 12. The stitch is formed on the work cloth with the embroidery thread of a desired color in cooperation with the above. 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 a V-belt connected to a sewing machine motor (not shown). Driven by a drive shaft 11 that is rotated by 10.

A work table 13 is provided at the front side of the sewing machine support plate 2 so as to be flush with the upper surface of the cylinder bed 6, and includes the work table 13.
A rectangular movable frame 16 extending in the left-right direction is mounted on a pair of auxiliary tables 14 and 15 provided on both left and right sides of the work table 13. The drive frame 16a at the right end of the movable frame 16 is driven to move in the X-axis direction (left-right direction) by an X-axis drive mechanism (not shown), and the drive frame 16b at the left end and the drive frame 16b. The part 16a is 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
Numeral 6 is movable on an XY plane by the X-axis drive mechanism and the Y-axis drive mechanism.

Next, an upper support mechanism 20 as an end support mechanism for supporting the vicinity of the upper end of the needle bar case 7 on the front end of the arm 3 will be described with reference to FIGS. 3, 4, and 6. FIG. . 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 of the arm portion 3.
A pair of guide blocks 22 are attached, and each of the pair of guide blocks 22 has a V-shaped groove 23a extending in the left-right direction and formed on both front and rear end surfaces, as shown in FIGS. The slide rail 23 is engaged movably in the left-right direction. A pair of left and right support members 24 and 25 extending in the front-rear direction are fixed to the slide rail 23 in the vicinity of the front ends thereof.

The needle bar case 7 has a substantially inverted L-shape when viewed from the side, and mounts on the supporting members 24 and 25 horizontal mounting plates 7a integrally formed on the right and left sides near the upper end thereof. In this state, they are fixed by mounting bolts 26, respectively.

As shown in FIG. 6, the pair of mounting plates 7a are formed with vertical pin holes 7c between the slide rail 23 and the rear mounting bolts 26, respectively. On the other hand, on each of the support members 24 and 25 on which the mounting plate 7a is placed and fixed, a vertically eccentric pin member 28 that fits into the pin hole 7c is screwed with a nut member 29. . In this eccentric pin member 28, a head portion 28a that fits into the pin hole 7c with respect to a shaft portion on which a screw is formed.
Is eccentric. Here, a position adjusting mechanism 27 is composed of a pin hole 7c formed in each of the left and right mounting plates 7a and an eccentric pin member 28 screwed to the support members 24 and 25.

Therefore, in each position adjusting mechanism 27, when the two mounting bolts 26 are loosened and the nut member 29 is loosened, and the eccentric pin member 28 is rotated clockwise or counterclockwise in plan view, the head 28a With the eccentric movement of the mounting plate 7, the mounting plate 7
a can be adjusted in the front-rear direction with respect to the support members 24 and 25.

Next, a second end support mechanism for supporting the lower end of the needle bar storage portion 7b of the needle bar case 7 at the front end of the arm 3 is provided.
The lower support mechanism 30 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, a hook portion 3 is provided at the lower end of the needle bar storage portion 7b over the entire width in the left-right direction.
An engaged member 31 having a substantially inverted L-shape in side view, on which 1a is formed, is attached. As shown in FIG. 3, a substantially L-shaped engaging member 32 which engages with the hook portion 31a from the front side (the side opposite to the arm portion) is provided at the lower end of the arm portion 3.
It is mounted in the screws 33 in. The screw 33 is inserted into a through hole 32a (see FIG. 4) that vertically penetrates the engaging member 32, and the through hole 32a has an oval planar shape. The engaging member 32 is composed of a surface portion which is substantially perpendicular, at the side where a substantially perpendicular, to the surface portion being formed of a through hole 32a is formed a groove 32b is along the orthogonal portion.

On the other hand, a vertically oriented pivot pin 35 to which the eccentric sleeve 34 is fixed is rotatably pivoted to the lower end of the arm portion 3 via a spacer 36.
A roller member 37 that comes into contact with the hook portion 31a from the rear side (the arm portion 3 side) is externally fitted to the hook portion 31a. As shown in FIGS. 3 and 7 , the pivot pin 35 forms a step 35b (shown only in FIG. 7) and is thick, and a thin tip portion has a groove 35a in its circumferential surface. (Shown only in FIG. 7). On the other hand, the nut member 3
8 is fixed. When a set screw (not shown) abuts the groove 35a from the horizontal direction, the pivot pin 3
5, the azimuth position and the vertical position are fixed. The set screw is fitted to a female screw (not shown) having an opening on the back side of a portion protruding below the arm 3. The female screw is formed at the shortest distance from the pivot pin 35.

The amount of eccentricity of the eccentric sleeve 34 depends on the length L of the through hole 32c through which the pivot pin 35 is inserted and the longitudinal direction of the arm 3 of the oval through hole through which the screw 33 is inserted. Less than the length of.

Accordingly, when the screw 33 is loosened and the nut member 38 fixed to the pivot pin 35 is rotated clockwise or counterclockwise in plan view, the rotation of the pivot pin 35 causes the eccentric sleeve 34 to rotate. , The roller member 37 moves eccentrically. As a result, the position in the front-rear direction of the engaged member 31 abutting on the roller member 37 from the front side can be moved by a very small distance. Thus, 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 3.

In each of the two position adjusting mechanisms 27, first, the two mounting bolts 26 are loosened and the nut member 29 is loosened. The eccentric pin member 2 of the left support member 24
8 is rotated clockwise or counterclockwise in plan view to move the head 28a eccentrically. Accordingly, the position of the left side of the needle bar case 7 is adjusted in the front-rear direction via the left position adjustment mechanism 27, so that the needle drop position of the leftmost one of the twelve needle bars 12 is finely adjusted. .

Similarly, the eccentric pin member 28 of the right support member 25 is rotated clockwise or counterclockwise in plan view to eccentrically move the head 28a, and via the right position adjustment mechanism 27. Since the position of 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 twelve needle bars 12 is finely adjusted. Thereafter, 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 portion 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, The needle bar case 7 is moved through the adjustment mechanism 27 so that the needle drop positions of all the needle bars 12 become the normal needle drop positions.
The mounting positions in the front-rear direction on both left and right sides of the camera can be adjusted independently.

In addition, if the rotational position of the eccentric pin member 28 of the position adjusting mechanism 27 is determined at the time of trial operation, including the assembling error of the needle bar case 7, etc., Since the position of the pin hole 7c to be fitted, that is, the mounting position of the needle bar case 7, is determined, the mounting position adjustment when mounting the needle bar case 7 removed for maintenance or inspection to the arm portion 3 can be omitted.

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,
This will be described with reference to FIGS.

At the rear ends of the pair of support members 24 and 25, a screw mounting plate 41 extending in the left-right direction is screwed. As shown in FIG.
Twelve engagement bolts 42 corresponding to the two needle bars 12 are provided at the same pitch as the pitch between the needle bars 12, and the nut 4
3 is fixed. A substantially U-shaped support frame 44 in a plan view is fixed to the arm portion 3 immediately behind the screw mounting plate 41.

A rotating shaft 45 in a left-right direction is rotatably supported by the support frame 44. A helical cam 46 engageable with the bolt 42 is fixed to the rotating shaft 45. The 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 mounted facing forward, and a drive shaft 49 of the motor 48 extends forward through the support frame 44 to 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 forward or backward, the bevel gear 47 is simultaneously rotated by the rotation of the bevel gear 50, and the spiral cam 46 is simultaneously rotated clockwise or counterclockwise. The bolt 42 engaged with the cam 46 moves leftward or rightward. This gives 1
The needle bar 12 is alternatively selected so that embroidery stitches can be formed on the work cloth with embroidery threads of a desired color.

Next, a connecting mechanism 55 for operatively connecting the needle bar cases 7 of the other embroidery sewing machines MH1 and MH3 to the needle bar case 7 of the embroidery sewing machine MH2 provided with the needle bar switching mechanism 40 is shown in FIG. -Explanation will be given based on FIG. 3 and FIG.

As shown in FIG. 3, the right support member 25 of the pair of support members 24, 25 provided on each of the three embroidery sewing machines MH1 to MH3 has a pair of connecting portions 56a.
Is attached. Then, the connecting shaft 57 is disposed in the left-right direction through the three connecting members 56, and the connecting shaft 57 is provided at these connecting portions 56a.
Respectively.

Therefore, as the needle bar case 7 of the embroidery sewing machine MH2 moves in the left and right direction, the connecting shaft 57 moves integrally in the left and right direction, so that the other needle bar cases 7 simultaneously move in the left and right direction. Be moved. That is, the three needle bar cases 7 are integrally moved in the left-right direction in synchronization.

Here, the 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 disposed at the front end of the arm 3. The base needle bar 61 is supported by the machine frame F at its upper end and lower end. A cylindrical vertical moving member 62 is externally fitted to the base needle bar 61 so as to be vertically movable. One end of a needle bar crank 64 is rotatably pivoted on a needle bar holder 63 connected to the vertical moving member 62. Supported. On the other hand, a balance crank 65 is fixed to the front end of the upper shaft 18 provided in the arm portion 3 in the front-rear direction, and the other end of the needle bar crank 64 is rotatably supported by the balance crank 65. ing. In the vicinity of the base needle bar 61,
The pivot pins 35 are arranged substantially in parallel.

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, and is connected to the connecting pin 66 of the needle bar 12 facing the vertical moving member 62. The rotating part 62a of the moving member 62 is selectively engaged. Accordingly, as the vertically moving member 62 moves up and down via the balance crank 65 and the needle bar crank 64 due to 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.

Next, the operation of the support mechanism for supporting the needle bar case 7 will be described. However, it is assumed that the slide rail 23 and the guide block 22 are attached to the upper end of the arm 3 in a direction substantially orthogonal to the arm 3.

Firstly, it loosened the screws 33, the engaging member 3
2 can be moved in the front-rear direction of the arm 3. continue,
The engaging member 32 is moved in the direction F in FIG. 3, and the gap between the arm 3 and the engaging member 32 is widened. Next, the set screw is loosened, and the pivot pin 35 can change its azimuth position, that is, becomes rotatable. Then, the pivot pin 35 is moved so that the amount of protrusion from the arm 3 of the roller member 37 is small. By being rotated, the gap between the roller member 37 and the engagement member 32 is widened. Thus, the preparation for assembling the needle bar case 7 at the lower portion of the arm 3 is completed. However, the set screw is only loosened so that the pivot pin 35 does not fall downward.

The needle bar case 7 is horizontally moved from the side of the arm 3 and the slide rail 23 is
, The needle bar case 7 is supported movably in the left-right direction of the arm 3. As a result, the lower part of the needle bar case 7 is located in the gap between the roller member 37 and the engaging member 32.

Next, when the pivot pin 35 is rotated to increase the amount of eccentricity of the eccentric sleeve 34 on the front side of the arm portion 3, the amount of protrusion of the roller member 37 from the arm portion 3 is increased. The roller member 37 comes into contact with the hook 31a from the arm 3 side. Subsequently, the set screw is tightened to fix the azimuth position of the pivot pin 35, thereby completing the setting of the needle bar position, that is, the needle drop point. At this time, if the needle drop point is deviated, the amount of protrusion of the roller member 37 from the arm 3 is changed, and the position of the point of action between the hook 31a and the roller member 37 swings in the front-rear direction of the arm 3. The needle drop point is adjusted.

Further, the engaging member 32 is moved in the R direction, and comes into contact with the hook 31a from the side opposite to the roller member 37. Subsequently, tightened the screws 33, the engaging member 32 becomes immovable, by the hook portion 31a is sandwiched between the engagement member 32 and the roller member 37, the direction of the arrow in FIG. 3, i.e. the needle bar The movement of the case 7 in the front-rear direction is restricted, and the needle bar case 7 is supported so as to be movable in the left-right direction of the arm 3, whereby the assembly of the needle bar case 7 to the arm 3 is completed. At this time, the lower end of the hook portion 31a is located in the groove 32b of the engaging member 32, and the lowermost end surface of the hook portion 31a faces the engaging member 32 with a slight gap.

As described above, in the adjustment work for assembling the needle bar case 7 to the arm portion 3, it is possible to reduce the trouble of particularly accurately determining the parallelism and dimensions of the upper support mechanism 20 and the lower support mechanism 30. The needle bar case 7
Can be easily and quickly assembled to the arm 3. Further, even when the embroidery sewing machine MH2 is overhauled, the needle bar case 7 can be easily assembled to the arm portion 3, and the labor involved is reduced. Therefore, maintenance can be easily performed by anyone, and the stop time of the embroidery sewing machine MH is shortened, so that the operation rate of the embroidery sewing machine MH is improved.

Further, since the roller member 37 is pivotally supported by the eccentric sleeve 34, the point of action of the roller member 37 and the hook 31a is changed in the front-rear direction of the arm 3 so that the position of the needle drop point is changed. Can be adjusted, sewing can be performed accurately, and this adjustment can be performed simply by rotating the pivot pin 35. On the other hand, also for the needle bar case 7, the labor for accurately determining the parallelism and dimensions for assembling to the arm portion 3 is reduced. Further, the pivot pin 35 is disposed near the base needle bar 61, and the needle bar case 7 is clamped near the needle bar 12 which is moved up and down, so that the driven needle bar 12 is securely fixed. Vibration of the needle bar 12 is reduced, and sewing can be performed accurately.

In this embodiment, the roller member 37
Is provided on the arm 3 side, but may be provided on the needle bar case 7 side.

Since the step 35b is formed on the pivot pin 35, the mounting position on the pivot pin 35 of the eccentric sleeve 34 can be easily determined, and the eccentric sleeve 34
Is attached, the pivot pin 35 and the engaging member 3
Since the position of the second arm portion 3 with respect to the arm portion 3 is determined, they can be easily attached.

[0052]

As described above in detail, according to the needle bar case supporting device of the multi-needle sewing machine according to the first aspect, the vicinity of one end of the needle bar case is movably supported by the rail member. The engaged member at the other end of the needle bar case is abutted from the side by the roller member, and is engaged by the engaging member from the opposite side, and the other end of the needle bar case is Because it is supported from both front and rear directions, the work of assembling the needle bar case to the arm part eliminates the need to find the exact parallelism and dimensions between the one end support mechanism and the other end support mechanism, and that assembly Work can be performed easily and quickly. As a result, the stop time of the multi-needle sewing machine is reduced, and the operation rate of the multi-needle sewing machine is improved.

According to the needle bar case supporting device of the multi-needle sewing machine according to the second aspect, the position of the point of action between the engaged member and the bearing can be changed in the front-rear direction of the arm by changing the amount of eccentricity. Therefore, the position of the needle bar, that is, the needle drop point can be adjusted to perform sewing accurately. Further, since the adjustment of the needle drop point is performed only by rotating the shaft, the adjustment operation is easy.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view taken along 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 explanatory view showing a needle bar switching mechanism.

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is an assembly view of a roller member.

[Explanation of symbols]

MH1~MH3 the sewing machine 3 arm 20 the upper support mechanism 23 slide rail 30 below portion supporting mechanism 31a hook 32 engaging member 34 eccentric sleeve 35 pivot pin 37 roller member

Claims (2)

(57) [Scope of request for utility model registration] 1. A needle bar case support device for movably supporting a needle bar case having a plurality of needle bars at a front end of an arm portion, wherein the needle bar case support device is provided on the needle bar case and extends in a row direction of the needle bars. An end support mechanism that includes a rail member supported at the front end of the arm portion so as to be movable horizontally, and that supports the vicinity of one of upper and lower ends of the needle bar case via the rail member; An engaged member provided over one of the upper and lower ends of the needle bar case over substantially the entire width thereof, rotatably pivoted about a vertical axis, and abutting against the engaged member from the side. A roller member and an other end support mechanism comprising an engagement member that engages the engaged member from the opposite side of the roller member and makes the engaged member abut on the roller member. A needle bar case support device for multi-needle sewing machines. 2. The needle bar case support of a multi-needle sewing machine according to claim 1, wherein said roller member is a bearing eccentrically supported by a vertically extending rotatable and stoppable shaft. apparatus.