JP4154212B2 - Sewing frame support structure of sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewing frame support structure for a sewing machine that supports a sewing frame that stretches and holds a work cloth.
[0002]
[Prior art]
In a conventional sewing frame support structure for a sewing machine, a sewing frame (embroidery frame) is held via a magnet holder on a driven member of a driving mechanism that drives in the left-right direction on a table. As the magnet holder is displaced in the left-right direction, the sewing frame is displaced in the left-right direction (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Registered Utility Model No. 2533958 Publication [0004]
[Problems to be solved by the invention]
As shown in FIG. 12A, the sewing frame support structure of the sewing machine is provided with a slider 52 that is slidably engaged with the rail 50 and attached to the sewing frame 51 and driven in the left-right direction. The length of the slider 52 is long in the left-right direction so that the vibration in the horizontal rotation direction of the sewing frame 51 generated by driving the slider 52 in the left-right direction is kept small. However, when the long slider 52 is used, the entire stroke range of the sewing frame 51 can be kept narrow, or the rail 50 has to be lengthened in order to widen the entire stroke range of the sewing frame 51.
Therefore, if the short slider 53 is used to increase the stroke of the sewing frame 51, the entire stroke range of the sewing frame 51 can be increased while keeping the length of the rail 50 the same as the conventional one as shown in FIG. It can be expanded. Also, as shown in FIG. 12C, when the entire stroke range of the sewing frame 51 is made the same as the conventional one, the length of the rail 50 can be shortened.
When these sliders 52 and 53 are driven in the left-right direction, as shown by arrows in FIG. 12, the horizontal slider generated at both ends in the left-right direction of the sliders 52 and 53, regardless of whether the slider 52 is long or short. The vibration in the rotational direction is substantially the same. However, when the short slider 53 is used as compared with the case where the long slider 52 is used, there is a difference that the distance from the slider 53 to each part of the sewing frame 51 is long. For this reason, there is a problem that the sense of stability of the sewing frame 51 is deteriorated, and a large vibration in the horizontal rotation direction is likely to occur at the tip and corner portions of the sewing frame 51.
[0005]
The object of the present invention is to solve the above-mentioned problems, to reduce the vibration in the horizontal rotation direction of the sewing frame without lengthening the slider, and to easily increase the stroke of the sewing frame without lengthening the rail. Is to be able to. Therefore, if it is not necessary to shorten the rail, the entire stroke range of the sewing frame can be expanded. On the other hand, if it is not necessary to widen the entire stroke range of the sewing frame, the rail can be shortened, and a compact sewing frame support structure for a sewing machine is provided.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the sewing frame support structure of the sewing machine according to the present invention supports a sewing frame having a predetermined width so as to be displaceable in the left-right direction with respect to a drive frame extending in the left-right direction supported so as to be displaceable in the front-rear direction. In the sewing frame support structure of the sewing machine, a slider having a length shorter than the width of the sewing frame attached to the center in the width direction of the sewing frame is slidably engaged with a rail extending in the left-right direction attached to the drive frame, Even if the sewing frame is displaced in the left-right direction, the drive frame is always provided between the drive frame and the sewing frame so that there is at least one roller that supports one or both of the right and left widthwise portions of the sewing frame. The roller is rotatably provided , and the roller is supported on the widthwise right part and the widthwise left part by contacting the contacted part in one or both of the widthwise right part and the widthwise left part of the sewing frame. characterized in that way the.
[0007]
Also, preferably, between the drive frame and the embroidery frame, without some of the rollers are present, so that other rollers are present is to provide a plurality of rollers.
[0009]
In addition, by providing the roller in both the drive frame and the sewing frame, the roller is brought into contact with the contacted portion in one or both of the widthwise right portion and the widthwise left portion of the sewing frame and the contacted portion in the drive frame. It can also be exemplified to support the right part in the width direction and the left part in the width direction of the sewing frame.
[0010]
The configuration of the roller and the manner of contact with the contacted part are not particularly limited, but the following (1) and (2) can be exemplified.
(1) The roller is a single roller, and the single roller is in contact with one surface of the contacted portion.
(2) The roller is a pair of sandwiching rollers, and the sandwiching roller contacts the front and rear surfaces of the contacted portion so as to sandwich the roller.
[0011]
In the sewing frame support structure of the sewing machine, the slider is displaced along the rail, and is composed of one slider block and a plurality of spaced slider blocks. There is. In either case, the length of the slider refers to the length from the rightmost end to the leftmost end of the slider. The slider and the rail are not particularly limited, but a commercially available LM guide may be used.
[0012]
The right part in the width direction of the sewing frame refers to a part on the right side of the right end of the slider attached to the sewing frame, and the left part in the width direction similarly refers to the part on the left side from the left end of the slider.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, two embodiments embodying the present invention will be described with reference to the drawings. In addition, in each embodiment, the dimension of each part and the numerical value which are listed below are illustrations, and can be changed suitably. In the sewing machine, the left-right direction is conventionally referred to as the X direction, and the front-rear direction is referred to as the Y direction. In the present specification, the second embodiment is a reference form.
[0014]
1 to 5 show a first embodiment in which the present invention is embodied in a sewing frame support structure for a single-head sewing machine. A table 1 is supported substantially horizontally on a product stand (not shown) via a frame (not shown), and a sewing head 2 is provided forward from the rear portion of the table 1. In the frame, a bed 3 is provided at a position directly below the sewing head 2 at substantially the same height as the table 1. As is well known, the work cloth is sewn by the cooperation of the needle driven up and down by the sewing head 2 and the shuttle driven by the bed 3.
[0015]
The sewing frame 30 is supported by the sewing frame support structure 10 so as to be displaceable in the X direction with respect to the drive frame extending in the X direction supported so as to be displaceable in the Y direction by the Y direction driving device 5.
The Y-direction drive device 5 includes drive belts (not shown) that are provided on the left and right sides of the table 1 between the frame and the table 1 and extend in the Y direction. Connecting members 6 a and 6 b each having a stopper 11 on the top are attached to the drive belt so as to protrude upward from the table 1.
[0016]
The sewing frame support structure 10 is horizontally mounted between the connecting members 6a and 6b supported so as to be displaceable in the Y direction, and is supported so as to be displaceable in the X direction with respect to the drive frame 13 extending in the X direction. The sewing frame 30 (width of about 550 mm) extends in the X direction, and the drive frame 13 and the sewing frame 30 face each other.
The drive frame 13 includes a drive belt 16 extending in the X direction, a rail 17 and a guide bracket 18.
[0017]
The rail 17 is formed slightly longer than the entire stroke range of the sewing frame 30 and is screwed onto the upper surface of the guide bracket 18 with a screw. The slider block 34 and the rail 17 may use a commercially available LM guide and a V-groove rail, respectively.
[0018]
The guide bracket 18 is formed in a substantially U-shaped cross-section with substantially the same width as the sewing frame 30, and an opening 19 formed by a notch continuing from the side surface to the bottom surface of the guide bracket 18 is spaced apart from each other (210 mm), and the center in the X direction. Are provided at three locations, that is, the left and right end portions. One single roller 22 is rotatably provided with its outer peripheral surface protruding outwardly from one opening 19 of the guide bracket 18. The protruding dimension of the single roller 22 is adjusted so that there is no gap with the sewing frame 30, and the single roller 22 is in contact so as to support one surface of the contacted portion 37 of the sewing frame 30. The single roller 22 is suspended with the shaft center 20 fixed to the roller bracket 21. The roller bracket 21 is fixed to the guide bracket 18 at the rear part thereof. Therefore, the three single rollers 22 are provided in the left-right direction with a mutual interval (210 mm).
[0019]
The sewing frame 30 includes a bracket 31 and a pair of product frame holders 32 that project forward at both ends of the sewing frame 30. The bracket 31 has a length in the X direction shorter than the width of the bracket 31 at a substantially central portion in the width direction, and protrudes toward the rear, which is the upper portion of the rail 17. And a contacted portion 37 in contact with each other. The upper surface of the protruding part 38 is fixed to a part of the lower part of the loop of the drive belt 16 by a belt attachment member 33. Two slider blocks 34a and 34b (slidably engaged with the rail 17 and spaced in the length direction of the rail 17) (from the leftmost end of the left slider block 34a to the right slider block) The length of the slider to the rightmost end of 34b is about 100 mm). The length from the right end to the left end of the slider block 34 and the length in the X direction of the protruding portion 38 are substantially the same.
[0020]
A frame grip 35 provided from the front end of the product frame holder 32 supports a rectangular frame-shaped product frame 36 with chamfered corners from the left and right. A work cloth is stretched and held in the product frame 36. Note that a large sewing frame can be attached instead of the product frame holder 32 , and the sewing frame 30 and the product frame 36 may be separate or integrally formed.
[0021]
The effects of the sewing frame support structure for a sewing machine constructed as described above will be described.
When the Y-direction drive device 5 is driven based on the sewing data, the drive frame 13 is driven in the Y direction via the connecting member 6, and accordingly, a slider block that engages with a rail 17 attached to the drive frame 13. Since 34a and 34b drive the sewing frame 30 in the Y direction, the product frame 36 is also driven in the Y direction. Further, when the motor (not shown) of the sewing frame support structure 10 is driven based on the sewing data, the slider blocks 34 a and 34 b are driven in the X direction via the drive belt 16. Along with this, the sewing frame 30 and the product frame 36 are driven in the X direction.
[0022]
When the sewing frame 30 is located at a substantially central portion with respect to the drive frame 13, all three single rollers 22 provided on the drive frame 13 are connected to the drive frame 13 as shown in FIG. It exists between the sewing frame 30. Of the three single rollers 22, the two single rollers 22 provided at substantially the left and right end portions of the drive frame 13 are separated from the slider blocks 34 a and 34 b of the sewing frame 30 in the left and right direction and the width direction. Since it can exist so as to support both of the right direction parts, the vibration in the horizontal rotation direction generated in the sewing frame 30 can be reduced most. One single roller 22 at a substantially central portion of the drive frame 13 is present at a substantially same position as a substantially central portion where the slider blocks 34 a and 34 b of the sewing frame 30 are provided. Further, as shown in FIG. 6B, the sewing frame 30 can be displaced in either the left or right direction from a position substantially at the center with respect to the drive frame 13.
[0023]
When the sewing frame 30 is positioned at the substantially left end with respect to the drive frame 13, as shown in FIG. 7A, two of the three single rollers 22 provided on the drive frame 13 from the left Two single rollers 22 exist between the drive frame 13 and the sewing frame 30. Of the two single rollers 22, one single roller 22 provided at a substantially central portion of the drive frame 13 supports the right portion in the width direction which is separated from the slider blocks 34a and 34b of the sewing frame 30 in the right direction. Therefore, the vibration in the horizontal rotation direction generated in the sewing frame 30 can be reduced. The single roller 22 at the substantially left end of the drive frame 13 is located at substantially the same position as the substantially central portion where the slider blocks 34 a and 34 b of the sewing frame 30 are provided. 7B, the left end 38a of the protruding portion 38 of the bracket 31 hits the stopper 11 provided on the connecting member 6a, so that the progress of the sewing frame 30 is stopped. .
[0024]
When the sewing frame 30 is positioned at the substantially right end with respect to the drive frame 13, it is only symmetric with respect to when it is positioned at the substantially left end with respect to the drive frame 13, as shown in FIG. As shown in FIG. 5A, two single rollers 22 from the right among the three single rollers 22 provided on the drive frame 13 are present between the drive frame 13 and the sewing frame 30. Of the two single rollers 22, one single roller 22 provided at a substantially central portion of the drive frame 13 supports the left portion in the width direction which is separated from the slider blocks 34a and 34b of the sewing frame 30 in the left direction. Therefore, the vibration in the horizontal rotation direction generated in the sewing frame 30 can be reduced. One single roller 22 at the substantially right end of the drive frame 13 is located at substantially the same position as the substantially central portion where the slider blocks 34 a and 34 b of the sewing frame 30 are provided. Further, as shown in FIG. 8B, the right end 38b of the protruding portion 38 of the bracket 31 hits the stopper 11 provided on the connecting member 6b, so that the progress of the sewing frame 30 is stopped. .
[0025]
As described above, since the single roller 22 that supports the sewing frame 30 exists between the drive frame 13 and the sewing frame 30 without increasing the length of the slider, the vibration in the horizontal rotation direction of the sewing frame 30 can be reduced. As a result, stable and highly accurate sewing can be performed, and productivity can be improved. Further, the stroke of the sewing frame 30 can be easily increased without lengthening the rail. Therefore, if the rail 17 does not need to be shortened, the entire stroke range of the sewing frame 30 can be expanded. On the other hand, if it is not necessary to widen the entire stroke range of the sewing frame 30, the rail 17 can be shortened and a sewing machine frame supporting structure for a compact sewing machine can be obtained.
[0026]
FIG. 10 shows a second embodiment according to the present invention. The sewing frame support structure of the sewing machine according to the present embodiment has the contacted portion 23 on the drive frame 13 side even if the sewing frame 30 displaces the entire stroke range in both the left and right width portions of the sewing frame 30. The only difference is that one single roller 40 is provided to maintain contact with each other, and that the contacted portion 23 on the drive frame 13 side is extended to the length substantially the same as that of the rail 17 in the left-right direction. This is different from the embodiment.
In the present embodiment, when the sewing frame 30 is displaced in the left-right direction, the two single rollers 40 that are horizontally arranged on the left side in the width direction and the right side in the width direction of the sewing frame 30 always have the drive frame 13 and the sewing frame 30. It has come to exist between.
[0027]
Therefore, the sewing frame support structure of the sewing machine according to this embodiment can provide the same effect as that of the first embodiment, and the single roller 40 can be moved in accordance with the stroke of the sewing frame, so that the number thereof can be two. .
[0028]
11 and 12 show a third embodiment according to the present invention. In the sewing frame support structure of the sewing machine according to the present embodiment, two pairs of sandwiching rollers 42 arranged side by side in the front-rear direction are provided at substantially the left and right ends of the drive frame 13, and the contact by the pair of sandwiching rollers 42 is The only difference from the first embodiment is that the pinching roller 42 is in contact with the front and rear surfaces of the contacted portion 37 of the sewing frame 30 so as to sandwich it.
In the present embodiment, when the sewing frame 30 is displaced in the left-right direction, at least one pair of the pair of pinching rollers 42 is always present between the drive frame 13 and the sewing frame 30, and the sewing frame 30. These are in contact with the front and rear surfaces of the contacted portion 37 on the right side in the width direction or on the left side in the width direction.
[0029]
Therefore, the sewing frame support structure of the sewing machine according to this embodiment can provide the same effects as those of the first embodiment, and the front and rear surfaces of the contacted portion 37 of the sewing frame 30 always with a pair of sandwiching rollers 42. The sewing frame 30 can be stably displaced in the left-right direction.
[0030]
In addition, this invention is not limited to the structure of the said embodiment, For example, as follows, it can also be changed and embodied suitably in the range which does not deviate from the meaning of invention.
(1) In the first embodiment, the four single rollers are changed to be provided on the drive frame side.
(2) The distance between the single rollers should not be uniform. For example, when the four single rollers are provided symmetrically in the drive frame as in the first embodiment, the distance between the four single rollers is 200 mm, 80 mm, and 200 mm in order from the left end.
(3) In 3rd embodiment, it changes so that a pair of clamping roller may be provided in the sewing frame side.
(4) A single roller is provided on both the drive frame and the sewing frame, the single roller provided on the drive frame is in contact with the contacted portion of the sewing frame, and the single roller provided on the sewing frame is the contacted portion of the drive frame. The single roller which supports the width direction right part and width direction left part of a sewing frame should exist by contacting with.
(5) The rail and slider need not be a commercially available V-groove rail and LM guide.
(6) The present invention is implemented in a multi-head sewing machine.
[0031]
【The invention's effect】
Since there is a roller that supports the sewing frame between the drive frame and the sewing frame without lengthening the slider, vibration in the horizontal rotation direction of the sewing frame can be reduced. Further, the stroke of the sewing frame can be easily increased without lengthening the rail. Therefore, if it is not necessary to shorten the rail, the entire stroke range of the sewing frame can be expanded. On the other hand, if it is not necessary to widen the entire stroke range of the sewing frame, the rail can be shortened and a sewing machine frame support structure for a compact sewing machine can be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of a sewing frame support structure for a sewing machine according to a first embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II of FIG. 1 of the sewing frame support structure.
FIG. 3 is a perspective view of the sewing frame support structure.
FIG. 4 is an enlarged perspective view of the sewing frame support structure.
FIG. 5 is an exploded perspective view of the sewing frame support structure.
6A is a cross-sectional view and FIG. 6B is a plan view of a position where the sewing frame of the sewing frame support structure is substantially in the center with respect to the drive frame.
7A is a cross-sectional view and FIG. 7B is a plan view of a position of a substantially left end portion of the sewing frame of the sewing frame support structure with respect to the drive frame.
8A is a cross-sectional view and FIG. 8B is a plan view of the position of the sewing frame of the sewing frame support structure at a substantially right end with respect to the drive frame.
FIG. 9 is a cross-sectional view of a sewing frame support structure for a sewing machine according to a second embodiment of the present invention.
FIG. 10 is a perspective view of a sewing frame support structure for a sewing machine according to a third embodiment of the present invention.
FIG. 11 is a cross-sectional view of a sewing frame support structure for a sewing machine according to a third embodiment of the present invention.
12A is a plan view when the length of the slider of the conventional sewing frame support structure of the sewing machine is (a) long, FIG. 12 (b) is a plan view when the length of the rail is the same as (a), and FIG. ) Is a plan view when the entire stroke range is the same as (a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Table 5 Y direction drive device 6 Connecting member 10 Sewing frame support structure 13 Drive frame 17 Rail 18 Guide bracket 22 Single roller 30 Sewing frame 31 Bracket 32 Product frame holder 34 Slider block 36 Product frame 40 Single roller 42 Nipping roller

Claims (4)

In a sewing frame support structure for a sewing machine that supports a sewing frame having a predetermined width so as to be displaceable in the left-right direction with respect to a drive frame extending in the left-right direction supported displaceably in the front-rear direction.
A slider having a length shorter than the width of the sewing frame attached to the central portion of the sewing frame in the width direction is slidably engaged with a rail extending in the left-right direction attached to the drive frame, and the sewing frame has left and right ends. So that there is always at least one roller that supports one or both of the right and left sides of the sewing frame between the drive frame and the sewing frame even if the entire stroke range between the driving frame and the sewing frame is displaced. The roller is rotatably provided on the drive frame , and the roller is brought into contact with the contacted portion in one or both of the right and left widthwise portions of the sewing frame. A sewing frame support structure for a sewing machine characterized by supporting the left part . The sewing machine according to claim 1 , wherein a plurality of the rollers are provided between the drive frame and the sewing frame so that other rollers can be present even if some of the rollers are not present. Sewing frame support structure. The sewing frame support structure for a sewing machine according to claim 1 or 2, wherein the roller is a single roller, and the contact is that the single roller contacts one surface of the contacted portion . The sewing frame support structure for a sewing machine according to claim 1 or 2, wherein the rollers are a pair of sandwiching rollers, and the contact is made by the sandwiching rollers contacting the front and rear surfaces of the contacted portion .

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