JPH0642622Y2 - Darts sewing machine - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention The present invention facilitates the adjusting operation of the presser foot when variably adjusting the dart depth in the dart sewing.
The present invention relates to a dart stitch sewing machine that does not require zero point adjustment even if the dart depth changes and is compact as a whole.

Prior Art As shown in FIG. 3, for example, in order to perform darts stitching on the waist portion of the slacks 22 (that is, how to sew by gathering pleats so that the seam does not appear on the surface), the starting point of the darts stitching From the zero point (0), the required dart depth h ₁
Need to sew with. For example, when a large amount of darts is sewn on a work cloth typified by slacks using an industrial sewing machine, the darts depth must be changed frequently depending on the type of slacks. Then, the change of the darts depth requires adjustment of the darts angle that determines the depth of the darts from the zero point and adjustment of the amount of entry of the darts.

As a means for adjusting the darts depth described above, for example, there is a cloth inserting device disclosed in Japanese Patent Publication No. 56-5553.
In the device disclosed in this publication, a first adjusting means including an adjusting screw, an elongated hole and a screw hole for changing the angle of the cloth support plate with respect to the intermediate arm to adjust the angle of the darts sewing, a space between the cloth support and the cloth presser. A second adjusting means composed of an eccentric pin, an elongated hole, a screw, and a sliding body, which is supported so as to be movable and engageable so as to face the edge of the cloth support plate that has entered into the space, and adjusts the darts entering amount. .

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The device described in the above publication requires the first and second adjusting means having a complicated mechanism to increase the manufacturing cost, and the first to change the depth of the darts. And the second
Each of the adjusting means must be operated, and there is a drawback that it requires extremely complicated labor. In addition, fine adjustment of the zero point, which is the sewing start point of darts sewing, can be performed in the first and second
There is also a problem that the work efficiency as a whole is significantly hindered due to the necessity of adjusting by the adjusting means. Further, in the conventional darts sewing machine, the arrangement structure of the support plate through which the work cloth is inserted and the structure of the holding member for catching the work cloth inserted and supported by the support plate are complicated, and the mechanism becomes large and compact. It also had some difficulties.

DISCLOSURE OF THE INVENTION In view of the above-mentioned drawbacks inherent in the darts sewing machine according to the prior art described above, the present invention has been proposed in order to solve this problem, and the darts depth is ensured by a simple operation. The purpose of the present invention is to provide a dart stitch sewing machine that is compact as a whole and that does not require fine adjustment of the zero point because the zero point is always constant.

Means for Solving the Problems In order to overcome the problems and achieve the intended purpose, the darts sewing machine according to the present invention can move horizontally on the sewing machine table in the X-axis and Y-axis directions of the coordinate system. Is arranged as
A feed plate that defines an opening that surrounds the needle drop position of the sewing machine, and a feed plate that is integrally movably disposed on the feed plate and that is connected to a lifting drive mechanism to perform a lifting motion for the feed plate. A first pressing member, a second pressing member that is pivotally supported by the first pressing member via a pivot shaft, and is horizontally rotatable within a required angle range, and the first pressing member is drilled at a required central angle. Adjusting means that is inserted into the circular arc hole and that can regulate the rotation angle of the second pressing member with respect to the first pressing member within a required range, and is positioned on the side of the feed plate to the sewing machine table. A cylinder that is disposed and horizontally reciprocates the piston rod in the Y-axis direction of the coordinate system, and is fixed to the piston rod in a direction orthogonal to the reciprocating direction, and is always positioned on the front side of the feed plate. And the top of the feed plate is driven by the cylinder. And a set plate that can reach a position beyond the needle drop position of the sewing needle, and a large number of fixed to a rotating shaft provided on the rear side of the feed plate, and inserted into the set plate to reach above the feed plate. It is characterized in that it is composed of a holding claw that releasably captures the work cloth.

Embodiments Next, a darts sewing machine according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. As shown in FIG. 1, a cycle sewing machine 10 (shown by a chain double-dashed line) represented by, for example, a bartacking sewing machine, which starts when a worker depresses a pedal and stops after forming a predetermined number of stitches, has a table 12 It is placed on top. This sewing machine 10
In the lower part of the upper arm 10a, a pulse motor is used as a drive source, and a horizontally movable feed base 14 is arranged at an arbitrary position in the X-axis direction and the Y-axis direction.
The feed plate 18 disposed and fixed on the sewing machine is horizontally extended below the sewing machine head 10b. The feed plate 18 located below the sewing machine head 10b surrounds the needle drop position of the sewing needle 16 and allows the feed plate 18 to move in a required horizontal region in the X-axis direction and the Y-axis direction. A triangular opening 18a is defined.

Further, a presser arm 20 is disposed and fixed on the feed base 14, and its head 20a faces above the feed plate 18. The head 20a can be lifted up and down with respect to the feed plate 18 and can press the work cloth 22 against the feed plate 18 in the lowered position.
24 are provided. The presser foot 24 is provided on the presser arm 20 fixed to the feed base 14, and as a result, the feed plate is
A first pressing member 26 that moves integrally with the first pressing member 26 that is moved up and down with respect to the feed plate 18, and a second pivot member that is horizontally rotatably supported by the first pressing member 26, as will be described later. Holding member
It consists of 28 and.

In the figure, reference numeral 30 is the feed plate 18 and the presser foot 24 described above.
1 shows a material feeding device for feeding a work cloth 22 to which darts are sewn like a slacks into a cloth pressing device made of. That is, the feed member 34 is slidably arranged on the guides 32, 32 provided at the right end portion of the table 12, and the feed member 34 is
It is connected to a piston rod 38 of an air cylinder 36 fixedly provided on the table 12 via a bracket 40, and can be horizontally reciprocated in the arrow Y direction by forward and reverse biasing of the cylinder 36. At the tip of the feed member 34, a set plate 44 made of a flat deformable plate material is fixed via a column 42 in a direction orthogonal to the feed direction.
As will be described later, can reach a position above the feed plate 18 and beyond the needle drop position of the sewing needle 16. In addition, the notch groove 44a provided in the end edge portion of the set plate 44 which is directed toward the cloth pressing device is provided with a tip of a pressing claw 54 which will be described later.
It is formed to avoid direct contact with 4.

The cloth presser 24 described above is composed of a first presser member 26 and a second presser member 28 as shown in the drawing. That is, the first pressing member
Reference numeral 26 denotes a vertical drive mechanism which is vertically moved by an elevator drive mechanism including an air cylinder (not shown) installed in the head portion 20a of the presser arm 20. The extension portion 26a of the first presser member 26 is provided. Is bent horizontally with respect to its vertical base and extends above the feed plate 18 in parallel with one oblique side of the opening 18a. On the back surface of the extending portion 26a of the first pressing member 26, a second pressing member 28 made of a rectangular plate piece sufficiently longer than one oblique side of the opening 18a is arranged. It is pivotally supported at one end through a pivot shaft 46 so as to be horizontally rotatable. That is, the second pressing member 28 is
As is clear from FIG. 2, a position (indicated by a chain double-dashed line) parallel to the hypotenuse of the triangular opening 18a is used as a starting point, and from this starting point, the inside of the opening 18a can be horizontally moved by a required angle. There is. Further, the needle drop position where the sewing needle 16 of the sewing machine 10 falls is always located inside the triangular opening 18a as described above.

Further, an arc hole 48 having a required center angle is formed at the other end of the extending portion 26a of the first pressing member 26, and an adjusting screw 50 inserted into the arc hole 48 is loosened in the second pressing member 28. It is designed to be screwed in freely. Therefore, by loosening the adjusting screw 50, the second pressing member 28 can be rotated with respect to the first pressing member 26 within the range of the arc hole 48 by a required angle. Also, by tightening the adjusting screw 50, the second
The pressing member 28 can be fixed to the first pressing member 26.

Further, at a portion close to the other end of the second pressing member 28 (the end on the side where the adjusting screw 50 is not arranged), the feed plate is provided.
A depth gauge 52 for holding the required distance from the upper surface of 18 and making it possible to read the depth of the darts on a scale is fixed to the feed table 14. In addition, in FIG.
Reference numeral 54 designates a holding claw that is inserted into the set plate 44 and catches the work cloth 22 that has arrived above the feed plate 18. A large number of the holding claws 54 are fixed to a rotary shaft 56 that is horizontally supported by the feed base 14, and the rotary shaft 56 has a pinion 56a provided at its tip.
Under the meshing action of the rack 60 connected to the cylinder 58, it is possible to rotate between a horizontal position that extends above the feed plate 18 and a standby position that rises perpendicularly thereto. ing. Further, limit switches LS ₁ and LS ₂ are provided at the respective stroke ends of the air cylinder 36 so that the backward and forward ends of the set plate 44 can be detected respectively.

Next, the actual use of the darts sewing machine according to this embodiment having the above-described structure will be described. Prior to performing the darts sewing, the presser pawl 54 stands up vertically and waits for the work cloth 22 to be captured by the pawl. The first pressing member
26 is moved up by a required distance by the operation of a lifting drive mechanism (not shown), and the second pressing member 28 pivotally supported on the member 26 is positioned above the feed plate 18 by a required distance. Further, the air cylinder 36 is urged to the forward end, and the work cloth 22 such as slacks that requires darts sewing is placed on the set plate 44, and the body portion is directed toward the cloth presser 24 side.

Next, the air cylinder 36 is urged to retract the set plate 44 toward the feed plate 18, and the work cloth 22 placed on the plate comes above the feed plate 18. This air cylinder
The rear end of 36 is detected by the limit switch LS ₁ , and the cylinder 58 is urged to rotate the presser pawl 54 at the vertical standby position so as to horizontally project above the feed plate 18,
The work cloth 22 located above is captured. Next, when a timer (not shown) is activated and a predetermined time elapses, the air cylinder 36 is reversely biased, whereby the set plate 44 retains the work cloth 22 retained by the pressing claw 54 on the feed plate 18. Keep moving forward and exit. This set plate 44
When the limit switch LS ₂ detects that it has reached the forward end, the limit switch LS ₂ sends the signal to an elevating and lowering drive mechanism (not shown), which lowers the work clamp 24 to clamp the work cloth 22 between it and the feed plate 18. In this state, the sewing machine 10 is started to start the darts sewing from the zero point. The darts sewing is automatically stopped when a predetermined number of stitches are formed.

When changing the depth of the darts, first the adjustment screw 50 is loosened as shown in FIG.
The pressing member 26 is horizontally rotated about the pivot shaft 46 by a required angle. That is, the second pressing member 28 has a position parallel to the hypotenuse of the triangular opening 18a as a starting point,
It is possible to move horizontally from the starting point toward the inside of the opening by a required angle, and after a certain dart depth is determined by this, the adjusting screw 50 is tightened again to complete the change of the dart depth. As described above, since the depth gauge 52 is provided on the feed plate 18, it is extremely convenient to determine the required dart depth by using this as a guide.

With the change of the darts depth, it is necessary to change the moving distances of the feed table 14 in the X-axis direction and the Y-axis direction.
In the case of a computer-controlled sewing machine, the position data is input by operating a ten key (not shown).
In this case, when the second pressing member 28 is rotated by a required angle with respect to the first pressing member 26, the movement distance data of the feed base 14 in the X-axis direction and the Y-axis direction is interlocked with this movement. Needless to say, may be automatically input to the computer.

When the darts sewing on the work cloth 22 represented by the slacks is completed, the lifting drive mechanism incorporated in the head portion 20a of the presser arm 20 is reversely operated, and the presser foot 24 including the first and second presser members 26 and 28 is pressed. Is lifted and the presser foot is released. Next, high-pressure air is blown onto the work cloth 22 from an air blowing pipe (not shown), and the work cloth 22 is pneumatically sent toward the stacker.

Effects of the Invention As described above, according to the darts sewing machine according to the present invention, it is possible to determine the depth of the darts, which conventionally required a lot of trouble, by a single operation. In addition, since it is not necessary to adjust the zero point, work efficiency is significantly improved, and since no complicated mechanism is required, the manufacturing cost can be reduced and the overall mechanical structure can be made compact, which is an excellent advantage. Have.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a darts sewing machine according to a preferred embodiment of the present invention, FIG. 2 is a plan view showing an operating state of a cloth pressing device used in the preferred embodiment, and FIG. [FIG. 6] is an explanatory diagram when, for example, darts sewing is performed on the slacks. 12 …… Sewing machine table 16 …… Sewing needle, 18 …… Feed plate 18a …… Opening, 22 …… Work cloth 24 …… Work clamp, 26 …… First presser member 28 …… Second presser member, 36 …… Cylinder 38 …… Piston rod 44 …… Set plate 46 …… Pivot shaft, 48 …… Arc hole 50 …… Adjusting means, 54 …… Presser pawl 56 …… Rotating shaft

Claims (1)

[Scope of utility model registration request] 1. An opening (18a) which is arranged on a sewing machine table (12) so as to be horizontally movable in the X-axis and Y-axis directions of a coordinate system and surrounds a needle drop position of a sewing needle (16). The feed plate (18) formed and a first pressing member (movably arranged on the feed plate (18) and connected to an elevating drive mechanism to move up and down with respect to the feed plate (18) ( 26), a second presser member (28) pivotally supported by the first presser member (26) via a pivot shaft (46) and horizontally rotatable within a required angle range, and the first presser member. The member (26) is inserted into an arc hole (48) formed at a required center angle, and the rotation angle of the second pressing member (28) with respect to the first pressing member (26) is restricted within a required range. A possible adjusting means (50) and a side of the feed plate (18) are arranged on the sewing machine table (12), and the piston rod (38) is arranged in the coordinate system. A cylinder (36) that horizontally reciprocates in the axial direction, and is fixed to the piston rod (38) in a direction orthogonal to the reciprocating direction, and is always positioned on the front side of the feed plate (18), A set plate (44) that can reach the position above the feed plate (18) and beyond the needle drop position of the sewing needle (16) by driving the cylinder (36), and the rear side of the feed plate (18) A large number of them are fixed to a rotating shaft (56) provided in the above, and a holding claw (54) which releasably captures the work cloth (22) which has been inserted into the set plate (44) and has arrived above the feed plate (18). ) A darts sewing machine characterized by being composed of and.