JPH07246288A - Overlock sewing machine provided with adjusting mechanism for lower scalpel - Google Patents

Abstract

PURPOSE:To conveniently use the overlock sewing machine by easily operating an adjusting dial and prevent the adjusting dial from disturbing sewing. CONSTITUTION:This overlock sewing machine is provided with a sew-up width adjusting mechanism 4 for adjusting sew-up width by operating an adjusting dial 2 and moving a lower scalpel stand 3 orthogonally to a sewing direction. The adjusting dial 2 of the sew-up width adjusting mechanism 4 is arranged so as to freely enter/leave a case 5 of the overlock sewing machine. Fabric is sewn at a standby position to insert the adjusting dial 2 to the case 5, and the sew-up width is adjusted by operating the adjusting dial 2 at an adjusting position to protrude the adjusting dial 2 from the case 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overlock sewing machine configured to move a lower knife to adjust the overedging width.

[0002]

2. Description of the Related Art An overlock sewing machine, which adjusts a cutting position of cloth when overlock stitching, allows a lower knife to move. The lower knife is moved in a direction orthogonal to the sewing direction, that is, in the lateral direction to adjust the position where the cloth is cut. Since the lower knife is fixed to the lower knife table, the lower knife table is moved to adjust the overedging width. An adjustment dial is provided to move the lower knife table sideways.

An overlock sewing machine that rotates the adjusting dial to move the lower knife laterally is, for example, a real fair 1-1.
No. 1183, Japanese Utility Model Publication No. 62-32551, Japanese Utility Model Publication No. 2-2291 and the like. In the adjustment mechanism of the lower knife of the overlock sewing machine described in these publications, the cam and the screw rod rotate when the adjustment dial is rotated. When the cam or screw rod is rotated,
The lower knife table is moved laterally so that the overedging width can be adjusted.

In the overlock sewing machines described in these publications, the adjustment dial is projected outside the case. For example, an overlock sewing machine described in Japanese Utility Model Publication No. 62-32551 discloses a needle plate 1 as shown in FIG.
The adjustment dial 2 is provided so as to project to the right side of.

[0005]

Although an overlock sewing machine capable of adjusting the overedging width by rotating the adjusting dial 2 can be used conveniently, it has a drawback that the adjusting dial 2 protruding when sewing is an obstacle. In order to prevent this adverse effect, a device in which the adjustment dial is provided inside a case that can be opened and closed has also been developed. However, the overlock sewing machine having this structure has a drawback that the lid of the case needs to be opened when adjusting the overedging width, and the lower knife cannot be easily adjusted. In addition, the overlock sewing machine of this structure has a drawback that no one can use it conveniently because the adjustment dial cannot be found where the lid is closed.

The present invention was developed for the purpose of solving this drawback. An important object of the present invention is to provide an overlock sewing machine having an adjusting mechanism for a lower knife which allows the adjusting dial to be operated easily and easily and can be conveniently used, and which does not disturb the adjusting dial when sewing. .

[0007]

The overlock sewing machine of the present invention has the following construction in order to achieve the above-mentioned object. The overlock sewing machine includes a warp width adjusting mechanism 4 configured to operate the adjusting dial 2 to move the lower knife base 3 in a direction orthogonal to the sewing direction to adjust the overedging width.

The adjusting dial 2 of the overedging width adjusting mechanism 4 is
The overlock sewing machine case 5 is arranged so that it can be moved in and out of the case 5 so that it does not get in the way when sewing and can be easily operated when adjusting the overedging width. Sew the cloth at the standby position to insert the adjustment dial 2 into the case 5,
The adjustment dial 2 is operated at the adjustment position where the adjustment dial 2 is projected from the case 5 to adjust the overedging width.

The standby position for pushing the adjusting dial 2 into the case 5 is designed so as not to interfere with sewing. The adjusting dial 2 can be completely inserted into the case 5, or can be made to stand by at a position slightly protruding from the case 5. This is because even if the adjustment dial 2 slightly projects from the case 5, it does not interfere with the sewing. Particularly, in the structure in which the adjustment dial 2 is operated to be pushed out from the case 5, it is convenient to use the adjustment dial 2 in a standby position at a position slightly protruding from the case 5. This is because the adjustment dial 2 for the insertion position can be easily set to the protruding position.

[0010]

In the overlock sewing machine of the present invention, the adjusting dial 2 is arranged so that it can be moved in and out of the case 5. When adjusting the overedging width by moving the lower knife table 3 sideways,
The adjustment dial 2 is projected outside the case 5. The adjustment dial 2 at the adjustment position protruding from the case 5 can be easily rotated to adjust the overedging width. When the adjustment of the overedging width is completed, the adjustment dial 2 is pushed into the case 5 and inserted into the standby position where it does not interfere.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples described below exemplify overlock sewing machines for embodying the technical idea of the present invention, and the present invention does not specify the structure of the overlock sewing machines as follows.

In this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiment are
It is added to the members shown in the "claims column", the "action column", and the "means for solving the problem" column. However, the members shown in the claims are not limited to the members of the embodiment.

The overlock sewing machine of the present invention is characterized by the overedging width adjusting mechanism for laterally moving the lower knife to adjust the overedging width. In particular, the mechanism of the adjustment dial that adjusts the lower knife table has a feature. Therefore, the overedging width adjusting mechanism for laterally moving the lower knife table to adjust the overedging width will be described in detail below.

FIG. 2 shows an overlock width adjusting mechanism 4 for adjusting the overlock width by laterally moving the lower knife 6 of the overlock sewing machine.
FIG. The overedging width adjusting mechanism 4 for the lower knife shown in this figure rotates the adjustment dial 2 in the direction indicated by the arrow B to move the lower knife base 3 in the direction orthogonal to the sewing direction (the direction indicated by the arrow A), and thereby the overedging width. Is adjusted.

The overedging width adjusting mechanism 4 includes a lower knife base 3 for fixing the lower knife 6, a screw rod 7 connected to the lower knife base 3, and a nut member 8 for moving the screw rod 7 in the axial direction.
An adjusting dial 2 connected to the nut member 8 via a spline, a lock cylinder 9 that locks the adjusting dial 2 in and out, and a scale cylinder 10 connected to the outer periphery of the nut member 8. The dial 2 is provided with a coil spring 11 that elastically pushes out a nut member 8.

The lower knife table 3 shown in the figure has a lower knife 6 on the right side.
Is fixed. The lower knife 6 is located on the side surface of the needle plate 1.
The lower knife 6 cuts by sandwiching a cloth with an upper knife (not shown) that reciprocates. In order to adjust the cutting position of the cloth, the lower knife table 3 is connected to the frame 13 so as to be movable in the lateral direction orthogonal to the sewing direction via the guide 12 as indicated by the arrow A. A guide 12 is horizontally fixed to the frame 13 in order to move the lower knife table 3 in the horizontal direction. The lower knife table 3 has a through hole 14 into which the guide 12 is slidably inserted. The screw rod 7 is horizontally fixed above the through hole 14.

The right end of the screw rod 7 is fixed to the lower female table 3 at a right angle in the figure, and a male screw is provided at the left end. A pushing spring 15 wound in a coil shape is inserted in the screw rod 7. The push spring 15 is a nut member 8 into which the screw rod 7 is screwed.
The right end of is elastically pressed against the base to hold the nut member 8 in place.

The nut member 8 is provided with a female screw into which the screw rod 7 is screwed in at the right end portion. The left end portion of the nut member 8 is connected to the adjustment dial 2 via a spline 16. The spline 16 includes the nut member 8 and the adjustment dial 2
And are connected so that they can move axially but do not rotate with respect to each other. In order to connect the nut member 8 to the adjustment dial 2 via the spline 16, the nut member 8 has a plurality of ridges extending in the axial direction on the outer circumference. Further, the nut member 8 is provided with a collar 17 protruding to the outer periphery in order to connect the scale cylinder 10. A gear is provided on the outer peripheral surface of the collar 17, and the scale cylinder 10 is connected in a state of meshing with the gear.

The nut member 8 is rotated by the adjusting dial 2, but does not move in the axial direction. A collar 18 is provided at the right end of the nut member 8 to hold the nut member 8 in place. U of the base fixing the nut member 8 to the frame 13
Guided in the groove, the collar 18 is pressed by the pushing spring 15 to hold the nut member 8 in place.

The adjusting dial 2 is formed in a tubular shape into which the nut member 8 is inserted, and is provided with a knob at the left end. The tubular portion of the adjustment dial 2 is connected to the nut member 8 via the spline 16. Therefore, on the inner surface of the tubular portion,
A groove is formed to allow the ridge of the nut member 8 to slide in the axial direction. In addition, the coil spring 11
A cylindrical shaft hole 19 into which is inserted is molded.

The adjusting dial 2 can be stopped at an adjusting position shown by a solid line in FIG. 2 and a standby position shown by a chain line. In order to realize this, a protrusion 20 is provided at the tip of the outer circumference of the adjustment dial 2. The protrusion 20 is hooked on the locking portion of the lock tube 9, and the adjustment dial 2 can be stopped at the adjustment position and the standby position. A plurality of protrusions 20 are provided at the tip of the adjustment dial 2 at equal intervals.

The lock cylinder 9 stops the adjustment dial 2 at the adjustment position and the standby position, and is formed in a cylindrical shape. The lock cylinder 9 rotates by a predetermined angle each time the adjustment dial 2 is pressed. When the lock tube 9 rotates, the adjustment dial 2
The position at which the projection 20 of FIG. The locking position of the protrusion 20 is changed, and the adjustment dial 2 is stopped at either the adjustment position or the standby position.

In order to rotate the lock cylinder 9 when the adjustment dial 2 is pushed in the direction indicated by the arrow C, the convex portion 21 of the development view shown in FIG. 3 is formed on the inner surface of the lock cylinder 9.
In this developed view, the portion indicated by the parallel line is the convex portion 21. FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in this sectional view, a convex portion 21 is formed on the inner surface of the lock cylinder 9, and a guide groove for guiding the protrusion 20 of the adjustment dial 2 is formed between the convex portions 21. In FIG. 3, the convex portion 21 of the adjustment dial 2 is indicated by the arrow D by the coil spring 11.
It is elastically pressed in the direction indicated by.

The convex portion 21 stops the protrusion 20 of the adjustment dial 2 at a fixed position and stops the adjustment dial 2 at the adjustment position and the standby position. Therefore, the convex portion 21 is provided with the stop portions a and c at two places. Stop a is adjustment dial 2
To the adjustment position. The stop portion c stops the adjustment dial 2 at the standby position. When the adjustment dial 2 is pushed in the direction indicated by the arrow C, the lock cylinder 9 rotates and the protrusion 20 moves along the path indicated by the two-dot chain line arrow E. The adjustment dial 2 moves in the axial direction, the lock cylinder 9 rotates, and the protrusion 20 moves to the path indicated by the alternate long and short dash line.

When the adjusting dial 2 is pushed in the direction of arrow C, the protrusion 20 has the inclined surface 22 in the pushing direction so that the protrusion 20 rotates the lock cylinder 9.
In order to slide the inclined surface 22 of the projection 20 that moves in the axial direction to rotate the lock cylinder 9, the sliding surface 23 is provided on the convex portion 21.
Is provided. The sliding surface 23 of the convex portion 21 and the inclined surface 22 of the protrusion 20 are inclined by 45 degrees with respect to the pushing direction of the adjustment dial 2. The sliding surfaces 23 of the convex portion 21 are arranged to face each other in order to rotate the lock cylinder 9 when the projection 20 is pushed in and when the projection 20 is retracted.

In FIG. 3, when the adjusting dial 2 is in the adjusting position, the protrusion 20 is in the a position. When the adjustment dial 2 is pushed in, the protrusion 20 at the position a is locked by the lock tube 9
To move to position b. At this time, the inclined surface 22 on the front surface of the projection 20 slides on the sliding surface 23 of the convex portion 21 arranged on the right side in the drawing, and rotates the lock cylinder 9. When the adjustment dial 2 is no longer pushed, the adjustment dial 2 is pushed by the coil spring 11 and moves from the position b to the position c. At this time, the inclined surface 22 provided on the back surface of the protrusion 20 slides on the sliding surface 23 of the convex portion 21 arranged on the left to rotate the lock cylinder 9. This is because the apex of the inclined surface 22 provided on the back surface of the protrusion 20 is located on the inclined surface 22 of the convex portion 21 arranged on the left. When the protrusion 20 is stopped at the c position, the adjustment dial 2 moves to the standby position. In this way, when the adjustment dial 2 is pushed once, the adjustment position is moved from the adjustment position to the standby position.

When the adjustment dial 2 is further pushed in this state, the protrusion 20 rotates the lock cylinder 9 to move it from the position c to the position d.
Move to position. This is because the apex of the inclined surface 22 on the front surface of the protrusion 20 is located on the sliding surface 23 of the right convex portion 21. When the adjustment dial 2 is no longer pressed, the protrusion 20 rotates the lock cylinder 9 and moves from the d position to the a position. This is because the apex of the inclined surface 22 on the back surface of the protrusion 20 is located on the sliding surface 23 of the convex portion 21 arranged on the left. Thus, the protrusion 20 is d
From the position to the position a, the adjustment dial 2 is moved from the standby position to the adjustment position.

As described above, the overlocking width adjusting mechanism 4 capable of switching between the adjusting position and the standby position each time the adjusting dial 2 is pressed once has a feature that it can be easily switched between the adjusting position and the standby position. However, the overlock sewing machine of the present invention does not specify the overedging width adjusting mechanism to the mechanism shown in the above figures.

For example, although not shown, by connecting the adjusting dial and the nut member via a spline having some sliding resistance, the mechanism for stopping at the adjusting position and the standby position can be omitted. The spline having sliding resistance can move to the standby position by grasping and pushing in the adjustment dial, and pulling out the adjustment dial at the standby position to move from the standby position to the adjustment dial. The adjustment dial is stopped at the standby position and the adjustment dial due to the sliding resistance with the nut member. The overedging width adjusting mechanism of this structure has a feature that the mechanism for stopping the adjusting dial can be omitted and the structure can be simplified.

In the overlock sewing machine, when the adjusting dial is operated to adjust the overedging width, it is preferable to interlock the thread slide piece of the needle plate with the lower knife. The needle plate that realizes this is
This is shown in the plan view of FIG. 5 and the cross-sectional view of FIG. In the needle plate 1 shown in these figures, when the lower knife 6 is moved to the right, the thread slide piece 24 is also moved to the right together.

In the needle plate 1 shown in these drawings, the thread slide piece 24 is moved by the lower knife 6 and the lower knife base 3. Thread slip 2
4 is connected to a rod 25 fixed to the lower surface of the needle plate 1 so as to be able to move laterally. The rod 25 is laterally extended and fixed to the lower surface of the needle plate 1. At the rear end of the thread slide piece 24, a through hole 26 is provided so as to be slidable on the rod 25, and a fitting groove 30 is opened at the lower surface. A projection 31 fixed to the lower female table 6 is fitted in the fitting groove 30. A pressing spring 27 wound in a coil shape is inserted in the rod 25. The pressing spring 27 presses the thread slide piece 24 to the left in FIGS. 5 and 6. A guide plate 29 for slidably holding the lower surface of the thread slide piece 24 is fixed to the lower surface of the needle plate 1 so that the thread slide piece 24 can be moved in the direction indicated by the arrow F without rotating.

The thread slide piece 24 is translated along the rod 25 by both the lower knife base 3 and the lower knife 6. In order to laterally move the thread slide piece 24 with the lower knife 6, the thread slide piece 24 is provided with a recess 28 into which the lower knife 6 is inserted. The recess 28 has an upper opening in the figure, and is shaped to fit the lower end of the lower knife 6. The thread slide piece 24 in which the lower knife 6 is fitted in the recess 28 is laterally moved integrally with the lower knife 6 when the lower knife 6 is laterally moved as shown by an arrow F.
At this time, the protrusion 31 of the lower knife table 3 also moves the thread slide piece 24 with the arrow F.
Move in the direction indicated by.

Explanation of terms used in the present specification and drawings Standby position: position where the adjusting dial is pushed into the case when sewing Adjust position: position where the adjusting dial is projected from the case when adjusting the overedging width Arrow A: The direction in which the lower knife base moves when adjusting the overedging width Arrow B: The direction in which the adjustment dial is rotated when adjusting the overedging width Arrow C: The adjustment dial is in the standby position and the adjustment position Direction to press when switching to arrow D ………… Direction where coil spring pushes adjustment dial Arrow E ……… Direction where protrusion of adjustment dial moves guide groove when pushing adjustment dial Arrow F ……… Lower female The direction in which the thread slide is moved by the overedging width adjustment mechanism .... The mechanism that moves the lower knife sideways to adjust the overedging width. Lower knife stand ..... Le ...... Rotated to move the lower knife stand sideways to adjust the overedging width Screw rod ……………… It is moved in the axial direction without rotating to adjust the overedging width Nut member ………… Axial direction It rotates without moving and moves the screw rod in the axial direction. Coil spring …… Elastically pushes the adjustment dial out of the case.

[0034]

The overlock sewing machine having the adjusting mechanism for the lower knife of the present invention can adjust the overedging width easily, easily and quickly, but the adjustment dial is extremely convenient without disturbing the sewing. There are features that can be used.
This is because the overlock sewing machine of the present invention has the adjustment dial arranged so that it can freely move in and out of the opening of the case. In the overlock sewing machine of this structure, when adjusting the overedging width, the adjustment dial is projected from the case, and the protruding adjustment dial can be gripped to easily move the lower knife table sideways. When the adjustment of the overedging width is completed, the adjustment dial can be pushed into the opening of the case, so that the sewing machine can stand by at a position where it does not interfere with sewing.

[Brief description of drawings]

FIG. 1 is a plan view showing an adjustment dial of a lower knife of a conventional overlock sewing machine.

FIG. 2 is a sectional view showing an example of an overlock sewing machine overlock width adjusting mechanism of the present invention.

FIG. 3 is a development view of the inner surface of the lock cylinder of the overedging width adjusting mechanism.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan view of a needle plate having a thread slide piece that moves together with moving a lower knife.

FIG. 6 is a cross-sectional view of a needle plate having a thread slide piece that moves together with movement of a lower knife.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Needle plate 2 ... Adjustment dial 3 ... Lower knife stand 4 ... Overedging width adjustment mechanism 5 ... Case 6 ... Lower knife 7 ... Screw rod 8 ... Nut member 9 ... Lock cylinder 10 ... Scale cylinder 11 ... Coil spring 12 ... Guide 13 ... Frame 14 ... Through hole 15 ... Push spring 16 ... Spline 17 ... Tsuba 18 ... Tsuba 19 ... Shaft hole 20 ... Projection 21 ... Convex part 22 ... Inclined surface 23 ... Sliding surface 24 ... Thread sliding piece 25 ... Rod 26 ... Penetration Hole 27 ... Pressing spring 28 ... Recessed portion 29 ... Guide plate 30 ... Fitting groove 31 ... Protrusion

Claims (1)

[Claims] 1. A lower knife base (3) by operating an adjustment dial (2).
In the overlock sewing machine equipped with the overedging width adjusting mechanism (4) configured to move the sewing machine in the direction orthogonal to the sewing direction to adjust the overedging width, the adjustment dial (2) of the overedging width adjusting mechanism (4) It is arranged so that it can be moved in and out of the case (5) of the lock sewing machine, and the cloth is sewn at the standby position where the adjustment dial (2) is inserted into the case (5). An overlock sewing machine having an adjusting mechanism for a lower knife, characterized in that the adjusting dial (2) is operated at an adjusting position where the lower knife protrudes from the adjusting position to adjust the overedging width.