JP4084574B2 - sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewing machine of a type in which a drive unit placed on a table surface of a sewing machine and arranged to hold a work cloth under a table surface is driven in the X direction and / or Y direction of the sewing machine. It is. In the sewing machine, the left-right direction is conventionally referred to as the X direction (or V direction), and the front-rear direction is referred to as the Y direction (or H direction).
[0002]
[Prior art]
As this type of sewing machine, as disclosed in Japanese Patent Laid-Open No. 7-316972 (FIG. 8) , a square frame-like sewing frame 51 placed on the surface of the table 50 and the table 50 are moved up and down. A Y-direction drive device comprising a shaft member 52 that freely engages with the sewing frame 51, and a belt drive mechanism and a slide guide mechanism provided below the table 50 that drives the shaft member 52 in the X direction or the Y direction. 53, an X-direction drive device (not shown) comprising a belt drive mechanism provided on the lower side of the table 50, and a cover plate 54 provided with a slit 55 for allowing the shaft member 52 to pass up and down the table 50; Sewing machines equipped with are known.
[0003]
Further, on the lower side of the table 50, the shaft member 52 is allowed to move in conjunction with the driving of the Y-direction drive device 53, and is displaced so as to close the slit 55. There is known a sewing machine provided with a closing body 56 that prevents dust from entering, and a tension applying mechanism 57 that keeps the tension on the closing body 56 substantially the same regardless of the displacement of the closing body 56.
[0004]
[Problems to be solved by the invention]
The sewing machine has the following problems.
(1) Since the cover plate 54 is formed by punching the slit 55 for allowing the shaft member 52 to pass therethrough, the material is wasted. In addition, it takes time to position the shaft member 52 and the slit 55 when the cover plate 54 is attached to the table 50.
(2) In order to prevent small objects and dust (for example, hidden yarn waste) from entering from the slit, if a closing body with a roller or a tension applying mechanism is provided, the number of parts increases and the structure becomes complicated. It was.
[0005]
SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a cover that can eliminate waste of materials and simplify positioning at the time of attachment. The second object of the present invention is to simplify the structure of the closing body.
[0006]
[Means for Solving the Problems]
In the sewing machine according to the present invention, a sewing frame is arranged immediately above the table, a notch extending in the X direction or the Y direction is formed in the table, and a driving device for driving the sewing frame in the X direction or the Y direction is notched below the table. A shaft member that moves in the X direction or the Y direction of the driving device protrudes from the notch to the upper side of the table and engages with the sewing frame, and the movement of the shaft member is allowed to the upper part of both edges of the table notch. In a sewing machine with a cover plate attached to cover the notch while leaving a slit of width, a pair of separately formed rectangular plates extending along the upper edge of the two edges on the upper edge of the notch and the upper edge of the other edge of the table Mounting holes extending in the width direction of the cover plate provided alternately at positions near the outer edge and slightly near the inner edge at substantially equal intervals with respect to the length direction of the cover plate; With the screw inserted through the hole There are, respectively mounted for positioning in the width direction of the cover plate, a slit between the inner edges of the two cover plates, in close proximity a pair of tip which faces closing substantially the slit, the shaft member of the pair A pair of closures having flexibility such that only a portion in contact with the shaft member when moving between the distal ends and the vicinity thereof are deformed to allow the movement, and the deformation is restored after the movement, Using the mounting hole extending in the width direction of the closing body provided at a position directly below the mounting hole of the cover plate in the closing body and the screw inserted through the mounting hole, Attached to the lower side together with the cover plate so as to be position-adjustable in the width direction of the closing body.
[0009]
The shape of the cover plate, the position corresponding to the edge of tables may be one folded portion is formed respectively.
[0010]
It is preferable that a plurality of attachment holes are formed at positions near the outer edge of the cover plate and slightly closer to the inner edge so that the inner edge side of the cover plate does not float from the table. Moreover, it is preferable that each mounting hole is subjected to a stepped process or a countersunk groove process (in this case, a countersunk screw is used) so that the screw does not protrude from the cover plate.
[0011]
As a material for the closed塞体, but are not limited to, it can be exemplified a urethane rubber, sponge rubber, flocked plate or the like. The shape of the closure is not particularly limited, but urethane rubber and sponge rubber are preferably sheet-like. In addition, the flocking plate is not particularly limited, but one end of innumerable hairs is fixed to the side surface of the plate-like base member and the other end is a free end, or a loop is formed on the side surface of the plate-like base member. Examples are those in which both ends of the hair are fixed and the loop side is a free end.
[0012]
The attachment position of the closing body is not particularly limited, but the following two modes can be exemplified.
(A) The aspect attached in the state pinched | interposed between the cover board and the table.
(B) The aspect attached to the lower surface of the cover board.
The attachment means is not particularly limited, but an embodiment using an adhesive, a screw or the like can be exemplified. In the case where the screw is used and configured in the mode (a), it is preferable that a mounting hole is formed in the closing body, and the cover plate and the closing body are overlapped and screwed to the table at a time. In this case, it is preferable that an attachment hole larger than the shaft portion of the screw is formed so that the closing body can be attached to the table so that the position can be adjusted.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show a sewing machine according to a first embodiment of the present invention. This sewing machine has a machine frame comprising a pair of left and right columns 1 standing on the floor, and a lower frame 2 and an upper frame 3 supported between the lower and upper portions of both columns 1 and extending in the left and right directions, respectively. A table 4 is supported on the lower frame 2 substantially horizontally. A plurality of sewing heads 5 are arranged in the X direction at a predetermined interval on the front surface of the upper frame 3, and a plurality of beds 6 are arranged on the lower frame 2 at a position directly below each sewing head 5 and substantially the same as the table 4. They are arranged in height. As is well known, sewing is performed on a work cloth, which will be described later, in cooperation with a needle that is reciprocated up and down by the sewing head 5 and a shuttle that is rotationally driven by the bed 6.
[0014]
Immediately above the table 4, for example, a flat horizontal rectangular frame-like sewing frame 8 (embroidery frame in an embroidery machine) is provided to directly stretch and hold the work cloth, and the work cloth is placed inside each side. It is held by a gripping means such as a clip and can be held in the frame. As shown in FIG. 2, the cross section of each side of the sewing frame 8 has a shape in which four vertical walls hang down from the plane wall, and each side has a rear X long side 8a and a front side as shown in FIG. X long side 8b, right Y short side 8c, left Y short side 8d.
[0015]
The table 4 is formed with notches 9 extending in the Y direction from the front end and the rear end to the other at three positions that are equally divided in the X direction. Further, two notches 10 extending in the X direction are formed at the center of the right end of the table 4.
[0016]
Below the notches 9 and 10, a Y-direction drive device 19 for driving the sewing frame 8 in the Y direction and an X-direction drive device 39 for driving in the X direction are provided along the notches 9 and 10 respectively. It has been. Further, stepped portions 16 and 17 are formed at the upper and lower edges of the notches 9 and 10, respectively. Since each Y direction drive device 19 and each X direction drive device 39 have the same configuration, only one Y direction drive device 19 and one X direction drive device 39 will be described below.
[0017]
The Y-direction drive device 19 includes a belt drive mechanism disposed at a position near the rear of the table 4 and a slide guide mechanism disposed at a position near the front of the table 4. The belt drive mechanism includes guide rails 20 and 30 provided on the rail base 7 of the lower frame 2, sliders 21 and 31 that slide on the guide rails 20 and 30, and an upper side of the sliders 21 and 31. The two shaft members 22 projecting from the notch 9 to the upper side of the table 4, and both inner side surfaces of the two vertical walls of the sewing frame 8 are rotatably mounted on the upper ends of the shaft members 22 in a horizontal plane. , A pair of pulleys 23 provided on the rail base 7 on both ends of the guide rail 20, and an endless belt that is coupled to the slider 21 at one location and wound around both pulleys 23. 24, and a connecting bar 26 that connects the slider 21 and the slider 31. The lower frame 2 supports a Y-direction drive motor 25 that is coupled to the pulleys 23 on the rear side of all the Y-direction drive devices 19 and drives the belts 24 in synchronization.
[0018]
The X-direction drive device 39 includes a guide rail 40 attached to the rail base 7 of the lower frame 2, a slider 41 that slides on the guide rail 40, and an upright side of the slider 41. A shaft member 22 that protrudes upward, a roller 27 that is rotatably attached to the upper end of the shaft member 22 in a horizontal plane and that engages with both inner side surfaces of the two vertical walls of the sewing frame 8, and a guide rail 40 Are formed of a pair of pulleys 43 provided on the rail base 7 at both ends thereof, and an endless belt 44 that is coupled to the slider 41 at one location and wound around both pulleys 43. The lower frame 2 supports an X-direction drive motor 45 that is coupled to the right pulley 43 of all the X-direction drive devices 39 and drives each belt 44 in synchronization. As the guide rails 20, 30, 40 and the sliders 21, 31, 41, it is easy to use, for example, commercially available V-groove rails and LM guides.
[0019]
A pair of cover plates 11 (or a pair of cover plates 12) separately formed on one edge upper portion and the other edge upper portion of the notch 9 (or notch 10) of the table 4 are attached so as to be position-adjustable. A slit 13 (or slit 14) having a width that allows movement of the shaft member 22 is formed between the inner edges of (or both cover plates 12).
[0020]
The cover plate 11 is formed in a square plate shape having substantially the same length as the Y direction of the table 4, and the cover plate 12 is formed in a square plate shape having substantially the same length as the notch 10. Are provided with folded portions 11b extending along the front and rear edges of the table 4, respectively. Further, the cover plates 11 and 12 are fitted in parallel to the stepped portions 16 and 17 as a pair, so that the cover plates 11 and 12 do not protrude from the surface of the table 4. Further, a slit having a width between which the shaft member 22 of the Y-direction drive device 19 (or the X-direction drive device 39) provided immediately below is allowed to move between the inner edges of the pair of cover plates 11 (or the cover plate 12). 13 (or slit 14) is formed.
[0021]
The cover plates 11 and 12 are provided with mounting holes 18 alternately at a position near the outer edge and a position near the inner edge at substantially equal intervals in the length direction. Each mounting hole 18 is formed so as to extend slightly in the width direction of the cover plates 11 and 12, and a countersunk screw 37 is inserted into each of the female screws provided in the stepped portions 16 and 17. . Accordingly, since the mounting hole 18 extends slightly in the width direction of the cover plates 11 and 12, the cover plates 11 and 12 are attached to the stepped portions 16 and 17 so that the position can be adjusted in the width direction. The positioning of the member 22 and the slits 13 and 14 is simplified. Further, since the mounting holes 18 are formed at positions near the outer edge of the cover plates 11 and 12 and at positions slightly near the inner edge thereof, the horizontal level of the cover plates 11 and 12 can be easily given to the table 4. Yes.
[0022]
That is, when the Y-direction drive motor 25 is driven based on the sewing data, the two shaft members 22 are driven in the Y direction along the slits 13, and accordingly, the two shaft members 22 are axially attached to the two shaft members 22. Two rollers 27 drive the sewing frame 8 in the Y direction. At this time, since the roller 27 of the X direction drive device 39 is engaged with the right side Y short side 8c parallel to the Y direction, the sewing frame 8 is allowed to be driven in the Y direction.
[0023]
Further, when the X direction drive motor 45 is driven based on the sewing data, the shaft member 22 is driven in the X direction along the slit 14, and accordingly, the roller 27 attached to the shaft member 22 is sewn. The frame 8 is driven in the X direction. At this time, since the two rollers 27 of the Y-direction drive device 19 are respectively engaged with the rear X long side 8a and the front X long side 8b parallel to the X direction, the sewing frame 8 is driven in the X direction. Is to be tolerated.
[0024]
According to the sewing machine configured as described above, no punching process is required at the time of production of the cover plate, so that no material is wasted on the cover plate. Further, since the mounting hole extending in the width direction is formed in the cover plate, the positioning of the shaft member and the slit can be simplified. Accordingly, the cost of the sewing machine can be reduced and the workability during the production of the sewing machine can be improved.
[0025]
Next, a second embodiment of the sewing machine embodying the present invention will be described with reference to FIG. 6 only for parts different from the first embodiment. The sewing machine of the present embodiment is different from the first embodiment only in that a closing body is provided on the lower side of the cover plate.
[0026]
That is, the sewing machine of this embodiment closes the slit 13 (or the slit 14) by bringing the pair of opposed tips close to the notch 9 (or the notch 10), and the shaft member 22 moves between the pair of tips. A pair of closing bodies 15 having flexibility such that only the portion in contact with the shaft member 22 and the vicinity thereof are deformed to allow the movement and the deformation is recovered after the movement is formed by the cover plate 11 (or the cover plate 12). It is provided on the lower side.
[0027]
Hereinafter, since the closing body 15 provided in the notch 9 and the closing body 15 provided in the notch 10 have basically the same structure, only the closing body 15 provided in the notch 9 will be described.
[0028]
The closing body 15 is formed of urethane rubber in the form of a sheet, and is formed in a slightly wider width with substantially the same length as the cover plate 11. Further, the closing body 15 is disposed on the lower surface of each cover plate 11 so as to protrude toward the slit 13 and is temporarily fixed with a double-sided tape. Thereafter, an attachment hole 15 a having substantially the same shape as the attachment hole 18 is formed at a position immediately below the attachment hole 18 simultaneously with the attachment hole 18 of the cover plate 11.
[0029]
The mounting hole 15a allows the flat head screw 37 to be inserted together with the mounting hole 18, and the mounting hole 15a and the mounting hole 18 are formed so as to extend in the width direction of the cover plate 11. Is attached to the stepped portion 16 by a flat head screw 37 so that the position thereof can be adjusted. In the present embodiment, the stepped portion 16 is deeper than the first embodiment by the thickness of the closing body 15, and the cover plate 11 does not protrude from the surface of the table 4.
[0030]
In addition, the pair of closing bodies 15 are configured so that the opposed tips are close to each other, so that the slit 13 is substantially closed and the shaft member 22 is sandwiched between the tips. Since the closing body 15 has flexibility, when the shaft member 22 is driven in the Y direction by the Y-direction drive device 19, the portion in contact with the shaft member 22 is deformed following the shape of the shaft member 22. After the shaft member 22 is moved, the deformation is recovered and the slit 13 is substantially closed.
[0031]
According to the sewing machine configured as described above, the same effect as that of the first embodiment can be obtained, and the surface of the table can be reduced while further reducing the parts cost and the production man-hour by making the closure body a simple structure. It is possible to prevent the small items and dust (hidden yarn waste, etc.) from entering from the slit.
[0032]
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) Although the cost of the cover plate cannot be reduced by applying the closing body 15 of the present invention to a conventional sewing machine equipped with a cover plate, the cost of parts and production man-hours related to the closing body can be reduced.
(2) The obturator 15 is changed to a flocking plate as shown in FIGS. 7 (a) and 7 (b).
[0033]
【The invention's effect】
As described in detail above, according to the sewing machine according to claim 1, it is possible to reduce the cost of parts by eliminating the waste of material that has occurred during the production of the cover plate, and the shaft member and the slit at the time of mounting the cover plate. This simplifies positioning and improves workability. Further, the inner edge side of the cover plate formed separately does not float from the table, and the horizontal level of the cover plate is easily obtained. Furthermore, it is possible to prevent the small and debris from the slit while reducing parts costs and production steps by which the closed塞体simple structure enters, allowing positional adjustment with respect to the closure also table.
[Brief description of the drawings]
FIG. 1 is a plan view of a sewing machine according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a perspective view of essential parts of the sewing machine.
6A is a plan view of a main part according to a second embodiment of the present invention, and FIG. 6B is a cross-sectional view of the main part.
7A is a plan view of a main part showing a modification of the sewing machine of the present embodiment, and FIG. 7B is a cross-sectional view of the main part.
FIG. 8 is a perspective view of a main part of a conventional sewing machine.
[Explanation of symbols]
4 Table 8 Sewing frame 9 Notch 10 Notch 11 Cover plate 12 Cover plate 13 Slit 14 Slit 19 Y-direction drive device 22 as drive device Shaft member 39 X-direction drive device as drive device

Claims (1)

A sewing frame is arranged immediately above the table, a notch extending in the X direction or the Y direction is formed in the table, and a driving device for driving the sewing frame in the X direction or the Y direction is provided below the table along the notch. The shaft member that moves in the X direction or the Y direction of the driving device protrudes from the notch to the upper side of the table and engages with the sewing frame, and the shaft member moves to the upper part of both edges of the notch of the table. In a sewing machine attached with a cover plate covering the notch leaving a slit with a width allowing
A pair of cover plates (11, 12) formed separately from each other in the form of a square plate extending along the upper part of both edges of the notch (9, 10) of the table (4). In the width direction of the cover plate (11, 12) provided alternately at a position near the outer edge and a position near the inner edge at substantially equal intervals with respect to the length direction of the cover plate (11, 12). The cover plates (11, 12) are attached to the cover plates (11, 12) so that their positions can be adjusted using the attachment holes (18) extending in the direction and the screws (37) inserted through the attachment holes (18). Forming the slits (13, 14) between the inner edges of the plates (11, 12);
The slits (13, 14) are substantially closed by bringing a pair of opposed tips close to each other, and when the shaft member (22) moves between the pair of tips, a portion in contact with the shaft member (22) and its vicinity Only a deformation | transformation permits only the said deformation | transformation, and after the said movement, a pair of closure body (15) provided with the softness | flexibility which the said deformation | transformation recovers is made into the said cover board (11,12) in this closure body (15). ) Provided in a position directly below the mounting hole (18), the mounting hole (15a) extending in the width direction of the closing body (15), and the screw (37) inserted through the mounting hole (15a) The sewing machine is attached to the lower side of the cover plate (11, 12) together with the cover plate (11, 12) so as to be position-adjustable in the width direction of the closing body (15) .

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