JP3178574B2 - Eyelet hole honing machine knife position adjusting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyelet sewing machine in which a knife-shaped notch is formed in a work cloth by a cutter device comprising a knife and a hammer of a required shape. The present invention relates to a scalpel position adjusting device for an eyelet sewing machine.

[0002]

2. Description of the Related Art An eyelet overlock sewing machine which performs an overhole stitch on an eyelet formed before or after on a work cloth generally has the following basic configuration. That is, the needle bar provided on the arm portion of the sewing machine frame and provided with a sewing needle at the lower end is moved up and down by a needle bar up / down driving mechanism, and the feed table on which the work cloth is set is provided with a feeder for the eyelet by the feed device. A feed drive along the cut shape is provided. Further, the needle drop point of the sewing needle is swung left and right for each stitch by a needle swing mechanism provided in the arm portion. A looper drive mechanism provided in the bed portion operates the looper in accordance with the vertical movement and the needle swing of the needle bar, and the overlock sewing is performed along the eyelet by the cooperation of the both.

[0003] The bed unit is provided with a cutter device comprising a lower knife and a hammer, whereby eyelets are cut into the work cloth at a required timing. That is, the lower knife in which the cutting blade composed of the straight portion and the circular portion is formed is positioned and fixed to the knife mounting position of the bed portion with the cutting blade facing upward via the mounting base. Further, the hammer is disposed so as to be able to freely contact and separate from above the lower knife, and the hammer is driven by a driving means such as a cylinder at a required timing when the work cloth set on the feed stand faces the lower knife and the hammer. By operating, a cut (eyelet hole) having a cutting blade shape of the lower knife is formed in the work cloth.

[0004]

As the lower knife of the cutter device, there are prepared a plurality of types of lower blades having different lengths of linear portions and circular portions of the cutting blade, and one of them is a bed. It is configured to be exchangeably fixed to the female mounting position of the section. That is, the user can change the shape of the eyelet formed in the work cloth by attaching a desired type of lower knife to the bed. On the other hand, the feed table on which the work cloth is set is provided with a feed drive along the cut shape of the eyelet formed by the selected lower knife. In this case, since the feed given to the feed table is set with respect to the machine reference, when replacing the lower knife, the lower knife is positioned and fixed in a correct posture with respect to the reference. If the lower knife is not positioned in the correct posture, the stitches for the eyelets will not be formed accurately, and the quality of the stitches will be degraded. For example, if a line extending in the front-rear direction of the feed bar that passes through the center of the needle bar facing the reference position is used as a reference, it is necessary to position and fix the lower knife in a posture in which the linear portion of the lower knife matches the reference line. .

Therefore, in a conventional cutter device, three ridiculous holes are formed in a mounting base for fixing the lower knife to the bed portion, and screws inserted into the ridiculous holes are screwed into screw holes formed in the bed portion. ing. Then, in a state in which the three screws are loosened, the operator moves the mounting base to make an adjustment so that the linear portion of the lower knife matches the reference line, and then the positioning is fixed by tightening the screws. ing. However, when the three screws are loosened, the mounting base can be moved in any of the front, rear, left, right, and circumferential directions. It was a difficult and time-consuming task. That is,
For example, if the straight portion of the cutting blade of the lower knife is displaced in the left-right direction with respect to the reference line, the mounting table may be moved in parallel, but the mounting table can be moved in any direction. , It moves in the front-back direction or the circumferential direction at the time of adjustment. Further, when the straight portion of the cutting blade is inclined at a required angle with respect to the reference line, a deviation in another direction occurs at the time of adjustment, and it has been difficult to perform accurate positioning.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-described drawback inherent in the knife position adjustment in the cutter device, and has been proposed in order to preferably solve the problem. It is intended to provide means that can be easily performed.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended object, the present invention provides a scalpel disposed on a bed portion via a mount so as to be adjustable in position, and a scalpel mounted on the scalpel. Equipped with a cutter device consisting of a hammer that can come and go
By actuating the hammer at a required timing with the work cloth facing between the scalpel and the hammer, the eyelet buttonhole sewing machine forming a scalpel-shaped cut in the work cloth is formed on the bed portion, and A long groove extending in a direction intersecting with the straight portion of the scalpel provided on the table, a guide member slidably fitted in the long groove and capable of fixing a position in the long groove, and a mounting table on the guide member. It comprises a pivot for pivoting horizontally and fixing means for positioning and fixing the mounting base to the guide member. With the mounting base positioned and fixed to the guide member, the mounting base is moved in the extending direction of the long groove. The position of the mounting table is adjusted in the circumferential direction around the pivot while the position is adjusted and the position of the mounting table relative to the guide member is released.

[0008]

In the eyelet buttonhole sewing machine, a guide member rotatably supported via a pivot on a mounting table provided with a knife is slidably fitted into a long groove formed in the bed. It is. Then, in a state where the mounting base and the guide member are positioned and fixed by the fixing means, the mounting base and the guide member are integrally moved along the long groove, so that the scalpel disposed on the mounting base is brought into its posture. The position can be adjusted in the extending direction of the long groove while being held. Further, when the guide member is positioned and fixed in the long groove, and the fixing stand is released from being fixed to the guide member, and the mounting stand is rotated around the pivot, the knife is adjusted only in the circumferential direction. Is done.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an eyelet sewing machine according to the present invention. (1) Overall Structure of an Eyelet Overlock Sewing Machine The eyelet overhole sewing machine in which the knife position adjusting device of the present invention is implemented basically has the following structure. That is, in FIG. 2, the sewing machine frame 10 includes a bed part 12 having a substantially rectangular box shape, and an arm part 14 extending upward and forward from the depth direction of the bed part 12.
Is a sewing machine table 1 equipped with a sewing machine motor (not shown).
6. A needle bar 20 having a sewing needle 18 at its lower end is provided on the front head of the arm portion 14 so as to be vertically movable and to be able to swing right and left for each needle. The needle bar 20 is driven up and down by a needle bar up / down drive mechanism (not shown) disposed on the arm unit 14. The bed portion 12 has two loopers 2 located immediately below the needle bar 20.
2 are provided. These loopers 22 are
It operates in synchronization with the vertical movement of 0 and the swinging movement of the needle, thereby forming a stitch on the work cloth 26 placed on the feed base 24 (described later) in cooperation with the sewing needle 18.

A work cloth 26 is provided on the upper surface of the bed 12.
Is mounted, and the feed base 24 is provided with a cloth holder (not shown) for holding the work cloth 26 on both sides of a cut formed by a cutter device 32 described later. . The feed base 24 is formed as a thin rectangular box as a whole, and is driven by a feed device having two pulse motors (not shown) to drive in the X direction orthogonal to each other.
(Left-right direction) and Y direction (front-back direction). The movement pattern of the feed base 24 is set so as to follow the cut shape of the eyelet formed in the work cloth 26, whereby the work cloth 26 placed on the feed base 24 is moved to a required position immediately below the sewing needle 18. , And overlock sewing can be sequentially performed on the cut edges of the eyelets.

(2) Regarding the Cutter Device The eyelet buttonhole sewing machine includes a lower knife 28 located on the depth side (rear side) of the looper 22 in the bed portion 12 and a hammer 30 which comes into contact with and separates the lower knife 28 from above. Is provided. Then, a hammer 30 facing above the lower knife 28 positioned and fixed at the knife mounting position of the bed portion 12 via a knife position adjusting device described later.
Is lowered toward the lower knife 28 by the urging of a driving means such as a cylinder (not shown), so that the work cloth 26 facing between the lower knife 28 and the hammer 30 has an eyelet comprising a round hole portion and a linear portion. The hole can be cut.

The lower knife 28 is shown in FIGS.
As shown in the figure, a cutting blade 36 composed of a straight portion 36a and a circular portion 36b is integrally formed on the upper portion of the flange portion 34,
The lower knife 28 is removably positioned and fixed to a mount 38 having a required shape via a flange portion 34. Mounting base 38
Is provided with a female mounting portion 38a, and fixing tools 40 are provided on both left and right sides of the mounting portion 38a so as to be fixable via screws 42, respectively. Then, the female mounting portion 38
Lower knife 28 which has been positioned in the front-rear direction with respect to a
Is fixed to the mounting base 38 via a pair of fixing tools 40, 40. The mounting base 38 is provided with three idiot holes, and a first fixing screw 44 inserted through each of the idiot holes.
Is screwed into a screw hole (not shown) formed corresponding to the female mounting position of the bed portion 12 so that the mounting table 3
8 is fixed to the bed 12. The mounting table 38 is configured to be movable in the horizontal direction by the difference between the diameter of the shaft portion of the screw 44 and the inner diameter of the fool hole by loosening the first fixing screw 44. Position adjustment is performed.

A pivot 46 is vertically disposed on the mounting table 38 at a position aligned with the linear portion 36a of the lower knife 28, and an end of the pivot 46 projecting from the lower surface of the mounting table has a required length dimension. The rectangular guide plate 48 is horizontally pivotally supported. The guide plate 48 is positioned and fixed via a second fixing screw 50 inserted through a fool hole formed in the mounting base 38. By loosening the second fixing screw 50, the pivot 46 (See FIG. 7). Further, at the position where the scalpel is attached to the bed portion 12, a reference line P (a feed line 2 passing through the center of the needle bar 20 facing the reference position) indicated by a dashed line in FIG.
4 is formed over a required length, and the guide plate 48 is slidably fitted in the long groove 52. The long groove 52 is formed with two screw holes spaced apart in the longitudinal direction, and each screw hole has a third fixing screw 5 inserted through a fool hole formed in the guide plate 48.
The guide plate 48 can be positioned and fixed in the long groove 52 by screwing the 4. In other words, by loosening the third fixing screw 54 in a state where the mounting base 38 and the guide plate 48 are positioned and fixed by the second fixing screw 50, as shown in FIG. 5 and FIG.
8 can be integrally translated along the long groove 52.

When the scalpel is mounted on the bed 12,
As shown in FIG. 7, an L-shaped holder 56 is fixed via a screw 58, and an adjusting screw 60 extending in the long groove 52 and in the direction is rotatably attached to the holder 56. The adjusting screw 60 is screwed into a screw hole 62 formed at a position corresponding to the mounting base 38, and by rotating the adjusting screw 60 in a required direction with the third fixing screw 54 loosened. The mounting table 38 is configured to move in the left-right direction along the long groove 52. The holder 56 is configured to be movable with respect to the bed portion 12 by loosening the screw 58. In this state, the second fixing screw 50 is loosened, and the adjusting screw 60 is rotated in a required direction. Mounting base 3
8 is rotated horizontally about the pivot 46.

[0015]

Next, the operation of the knife position adjusting device according to the embodiment will be described. The lower knife 28 is attached to the bed 12.
When positioning and fixing the mounting table 38, first, the guide plate 48 disposed on the mounting table 38 is
The three first fixing screws 44 inserted through the non-standard holes are loosely screwed into the corresponding screw holes, and the mounting base 38 is mounted in an adjustable state.

(Regarding Adjustment of Lower Knife to Mounting Base) The guide plate 48 is positioned and fixed in the long groove 52 through third fixing screws 54, 54, and the mounting base 38 and the guide plate 48 are fixed.
Are positioned and fixed via the second fixing screw 50. Then, with the screw 42 of each fixture 40 provided on the mounting base 38 loosened, the lower knife 28 is moved in the front-rear direction with respect to the knife mounting portion 38a, and the position of the lower knife 28 is adjusted. The lower knife 28 is positioned and fixed to the mounting base 38 by tightening the screw 42 of each fixture 40. As a result, the lower knife 28 is positioned in the Y direction (front-back direction) in the movement pattern of the feed table 24.

(Adjustment when the straight portion of the lower knife is displaced in a state parallel to the reference line)
5 is attached to the scalpel mounting position, as shown in FIG. 5 or FIG.
a (the center line passing through the straight line portion 36a is indicated by a two-dot chain line) is displaced in parallel in the left-right direction.
8 and the third fixing screw 5 for fixing the guide plate 48 and the long groove 52 together with the second fixing screw 50.
Loosen 4,54. In this state, when the adjusting screw 60 is rotated in a required direction, the guide plate 48 and the mounting base 38 are integrally moved in parallel along the long groove 52. Then, at a position where the linear portion 36a of the lower knife 28 coincides with the reference line P, the guide plate 48 and the long groove 52 are connected to the third fixing screws 54, 54.
, Accurate positioning of the lower knife 28 is performed.

(Adjustment when the straight portion of the lower knife is inclined by a required angle with respect to the reference line)
7, the straight portion 36a of the lower knife 28 (the center line passing through the straight portion 36a is indicated by a two-dot chain line) is inclined by a required angle with respect to the reference line P, as shown in FIG. If so, the guide plate 48 and the long groove 52 are fixed via the third fixing screws 54, 54, and the second fixing screw 50 for fixing the mounting base 38 and the guide plate 48 is loosened. If the adjusting screw 60 is rotated in a required direction while the holder 56 of the adjusting screw 60 is movable, the mounting table 38 is horizontally rotated about the pivot 46. Then, the guide plate 48 and the mounting table 38 are fixed via the second fixing screw 50 at the position where the linear portion 36a of the lower knife 28 is coincident with the reference line P, so that the lower knife 28 is accurately positioned. Is made.

After the above adjustments have been made to position the lower knife 28 at the correct position, the mounting table 38 and the bed portion 12 are fixed with three third fixing screws 54 to complete the adjustment operation.

As described above, in the embodiment, the mounting table 38 can be moved in parallel along the long groove 52 while the lower knife 28 disposed on the mounting table 38 is held in a fixed posture. Occasionally, it is possible to prevent the displacement in the other direction. Also, when adjusting the deviation of the angle of the lower knife 28 with respect to the reference line P, the mounting table 38 can be horizontally rotated about the pivot 46, so that the deviation in the other direction can be prevented during this adjustment. Can be. Therefore, it is possible to easily perform fine position adjustment by the operator, and there is an advantage that the work efficiency can be improved.

[0021]

As explained above, according to the knife position adjusting device for an eyelet buttonhole sewing machine according to the present invention, when the knife arranged on the mounting table is moved and adjusted in a direction orthogonal to the bed, the bed is adjusted. Under the guide action of the long groove formed in the portion and the guide member arranged in the mounting table, the parallel movement can be performed while maintaining the same posture. When adjusting the position of the straight portion of the scalpel in the circumferential direction, the adjustment can be made about the pivot. That is, since the movement in the direction different from the direction to be adjusted does not occur, the adjustment can be performed easily and accurately. Thereby, there is an advantage that the time required for the adjustment can be shortened and the working efficiency can be improved. In addition, since the position of the mounting table is adjusted via the adjusting means provided on the bed portion, fine adjustment can be easily performed as compared with manual operation by the operator.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a knife position adjusting device according to an embodiment.

FIG. 2 is an overall side view showing a schematic configuration of an eyelet buttonhole sewing machine in which the knife position adjusting device according to the embodiment is implemented.

FIG. 3 is a schematic perspective view showing a knife position adjusting device according to the embodiment.

FIG. 4 is a schematic perspective view showing a knife position adjusting device according to the embodiment.

FIG. 5 is an explanatory view showing a state in which the mounting base is translated along a long groove in the knife position adjusting device according to the embodiment.

FIG. 6 is an explanatory view showing a state in which the mounting base is translated along a long groove in the knife position adjusting device according to the embodiment.

FIG. 7 is an explanatory view showing a state in which the mounting base is horizontally rotated about a pivot in the knife position adjusting device according to the embodiment.

[Explanation of symbols]

 12 Bed part 26 Work cloth 28 Lower knife 30 Hammer 32 Cutter device 36a Linear part 38 Mounting base 46 Axis 48 Guide plate 50 Second fixing screw 52 Long groove 56 Holder 60 Adjustment screw

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-285583 (JP, A) JP-A-61-56688 (JP, A) JP-B-11-3335 (JP, B1) JP-B-5959 13972 (JP, Y2) Utility model registration 259591 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D05B 37/00-37/10

Claims (3)

(57) [Claims] 1. A knife (28) arranged on a bed portion (12) via a mounting base (38) so as to be adjustable in position, and a hammer (30) freely contactable to and detachable from above the knife (28). Cutter device consisting of (32)
By operating the hammer (30) at a required timing with the work cloth (26) facing between the scalpel (28) and the hammer (30), a female-shaped cut is made in the work cloth (26). In the eyelet buttonhole sewing machine forming a long groove (52) formed in the bed portion (12) and extending in a direction intersecting with the linear portion (36a) of the scalpel (28) disposed on the mounting base (38). ), A guide member (48) slidably fitted in the long groove (52) and capable of fixing the position in the long groove (52), and a mounting table (38) horizontally rotating the guide member (48). A pivot (46) movably supported, and fixing means (50) for positioning and fixing the mounting base (38) to the guide member (48), and the mounting base (38) is mounted on the guide member (48). With the positioning fixed, the position of the mounting base (38) is adjusted in the extending direction of the long groove (52),
In a state where the position of the mounting base (38) with respect to the guide member (48) is released, the mounting base (38) is configured to adjust the position in the circumferential direction around the pivot (46). Eyelet sewing machine knife position adjustment device. 2. An adjusting means (2) for adjusting the length of the elongated groove (52) of the mounting table (38) in the extending direction and adjusting the bed section (12) in the circumferential direction around the pivot (46). 2. The knife position adjusting device according to claim 1, further comprising: 3. The apparatus according to claim 1, wherein a knife (28) is mounted on the mounting table (38) in a direction intersecting with the long groove (52) so as to be adjustable.