JP2009279234A - Piping sewing machine - Google Patents

Abstract

An object of the present invention is to provide an edge stitch sewing machine capable of smoothly folding an edge cloth according to the thickness of the fabric.
A binder for placing a ball cloth placed on a body cloth on a bottom plate portion and a standing plate portion; an upper position of the bottom plate portion on both sides of the standing plate portion of the binder; Each folding plate has a pair of folding plates 3 arranged at an initial position spaced apart from each other and each folding driving means 26 for moving each folding plate to an upper position and an initial position. Means to move the initial position from the initial position to the upper position, the ends of the folding plates are folded back to the upper surface side of the bottom plate portion by bending both ends of the edge fabric extending from the left and right ends of the bottom plate portion. In an edge stitch sewing machine having a folding device 2 for folding cloth, based on the fabric thickness detecting means for detecting the fabric thickness of the ball edge fabric and the ball edge fabric, and the fabric thickness detected by the fabric thickness detecting means. And means 28 for moving the folding plate up and down. That.
[Selection] Figure 4

Description

  The present invention relates to an edge stitch sewing machine, and more particularly, to an edge stitch sewing machine capable of moving a folding device up and down according to the thickness of a fabric to position a folding plate at a good height.

  The bead stitch sewing machine has a flat bottom plate portion, a binder composed of a flat plate standing upright perpendicular to the bottom plate portion, and both sides and above the binder standing plate portion. A folding device having a pair of flat folding plates is provided (for example, see Patent Document 1). Before the bead sewing by the bead stitch sewing machine, there is a step of folding the bead fabric with a pair of long flat plate folding plates of the folding device. In the process, first, on the sewing machine table, a pair of plate-shaped large pressers are placed on the body cloth across the needle drop position, thereby holding the body cloth on the sewing machine table. Next, a ball cloth is stacked on the body cloth facing between the pair of large pressers, and the binder is placed on the ball cloth. In addition, the folding drive means of the folding device moves each folding plate toward the upright side of the binder so that both ends of the ball cloth extending from both sides of the bottom plate of the binder are Folded to the upper surface side of the part.

JP 2007-29435 A

  By the way, in the folding device 2 of the conventional edge stitch sewing machine 1, as shown in FIGS. 6 (A) and (B), the folding plate 3 is kept at a set height while maintaining the horizontal. 4 is configured to move closer to the standing plate portion side. However, as shown in FIG. 6 (A), when the fabric thickness is thicker than expected, the folding plate 3 stops while moving closer to the standing plate portion side 4 of the binder 4 due to the thickness and rigidity of the fabric. There was a case. In addition, as shown in FIG. 6B, when the fabric thickness is thinner than expected, an extra gap is generated between the folding plate 3 and the ball cloth 5, and the ball cloth 5 is distorted. There was a problem that the amount of folding became unstable.

  Therefore, in order to cope with the above problem, the rubber plate 7 attached to the lower surface of the large presser 6 at the lower part of the folding plate 3 is replaced with a rubber plate 7 having an appropriate thickness. The height of 3 was adjusted. However, since the thickness of the fabric frequently changes in the actual sewing work, there has been a problem of reduction in production efficiency and cost due to the replacement work of the rubber plate 7.

  Then, in view of such a point, the present invention has an object to provide an edge stitch sewing machine that can smoothly perform the operation of folding the edge cloth in accordance with the fabric thickness.

  In order to achieve the above-described object, the edge stitch sewing machine according to claim 1 has a bottom plate portion and a standing plate portion standing vertically to the bottom plate portion, and the base fabric portion is provided on the bottom plate portion and the standing plate portion. A binder that guides the needlework position of the sewing needle along the rim cloth placed thereon, a pair of folding plates disposed above the bottom plate portion on both sides of the standing plate portion of the binder, and Each folding drive means arranged to correspond to each folding plate, each folding plate is moved closer to the vertical plate portion by each corresponding folding drive means, and the tip of each folding plate In the bead stitch sewing machine comprising: a folding device that includes a folding device that folds the edge cloth by folding both ends of the edge cloth extending from the left and right ends of the bottom plate part to the upper surface side of the bottom plate part. The cloth thickness detecting means for detecting the cloth thickness of the ball edge cloth and each folding drive means Are constant, based on the dough thickness detected by the cloth thickness detecting means is characterized by comprising a vertical movement driving means for vertically moving the folding device.

  In addition, the feature of the bead stitch sewing machine according to claim 2 is that, in the bead stitch sewing machine according to claim 1, the vertical movement drive means is arranged such that the rotor extends in the horizontal direction. A motor, a pinion connected to the rotor of the motor, and a rack that meshes with the pinion and extends in the vertical direction, and the motor or the rack is fixed to the folding device. is there.

  The bead stitch sewing machine according to claim 3 is characterized in that, in the main stitch sewing machine according to claim 1 or 2, the cloth thickness detecting means is a potentiometer for changing a resistance value by pressure due to the cloth thickness. It has a meter.

  As described above, according to the edge stitch sewing machine of the present invention, the folding device can be appropriately operated by the vertical movement driving means based on the body cloth detected by the cloth thickness detecting means and the cloth thickness of the edge cloth. It is possible to move up and down to a certain height. Thereby, the folding operation | movement of the smooth bead fabric 5 corresponding to each fabric thickness can be performed for the folding plate adjusted to appropriate height. Therefore, it is possible to always sew a bead having a stable folding amount even with different fabric thicknesses.

  Hereinafter, a bead stitch sewing machine 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

  FIG. 1 shows an overall schematic configuration of the edge stitch sewing machine 1. The bead-sewn sewing machine 1 of the present embodiment includes a sewing table 8 that is a sewing work table, a sewing machine frame 9 that is disposed so as to be orthogonal to the sewing machine table 8, a binder 4 that is connected to the sewing machine frame 9, and a bead A folding device 2 that folds the cloth 5 along the binder 4 is provided, and is composed of a large presser device 10 that transfers the body cloth 17 and the ball edge cloth 5 on the sewing table 8 in the cloth transfer direction passing through the two needles of the sewing machine. Yes. In the present embodiment, the respective directions are determined with reference to the XYZ axes shown in FIG. The Z-axis direction is a direction that coincides with the up-and-down movement direction of the binder 4 described later, and the X-axis direction is parallel to the plane on the sewing machine table 8, and the cloth transfer direction (arrow F in FIG. 1) The Y-axis direction is parallel to the plane on the sewing machine table 8 and coincides with the moving direction of the folding plate 3 described later.

  At the distal end portion of the sewing machine arm portion 9a of the sewing machine frame 9, a double needle 11 in which two needles are arranged in parallel in the Y-axis direction and a center knife 12 is provided at an intermediate position of the two needles 11 in the Y-axis direction. ing. A sewing table 8 as a work table is arranged so as to be orthogonal to the sewing machine frame 9. The sewing machine table 8 is provided with a needle plate 13, and two needle holes 14 are formed in the needle plate 13 at a needle drop position T where each needle of the two needles 11 drops.

  In FIG. 2, the principal part enlarged view of the binder 4 and the binder support means 16 is shown. FIG. 3 shows an enlarged view of main parts of the binder 4 and the large presser device. The binder 4 includes a bottom plate portion 4b having a substantially rectangular shape as a whole and a standing plate portion 4a having a flat plate shape as a whole. The vertical plate portion 4a is formed on the top surface of the bottom plate portion 4b in the width direction of the bottom plate portion 4b (Y-axis direction). ) In a vertical position with the longitudinal direction aligned with the bottom plate portion 4b. That is, the bottom plate portion 4b and the upright plate portion 4a are integrally formed so as to have an inverted T shape when viewed from the cross section. In addition, U-shaped concave portions (not shown) are formed at two positions sandwiching the upright plate portion 4a at the distal end portion of the bottom plate portion 4b, and the needle drop position T of each needle of the two needles 11 corresponds to each concave portion. The needle drops at positions where they do not contact the bottom plate portion 4b.

  As shown in FIG. 2, the upper portion of the upright plate portion 4a of the binder 4 is supported by a binder supporting means 16 having a cylinder 15 as a binder driving means. During standby, as shown in FIG. Is retracted to a retracted position above the needle plate 13. When the body cloth 17 and the ball cloth 5 are set and sewn, the body cloth 17 is lowered to the lower position on the ball cloth 5 superimposed on the body cloth 17, and the longitudinal direction of the bottom plate portion 4b is parallel to the X-axis direction. As shown, the tip portion is placed toward the downstream side in the cloth transport direction through which the needle drop position T passes.

  As shown in FIG. 2, the binder support means 16 includes a flat plate-like support plate 18, a first arm portion 19a, and a second arm portion 19b fixed to the front surface of the sewing machine arm portion 9a of the sewing machine frame 9. One end of one arm portion 19a and one end of the second arm portion 19b are integrally formed with a connecting shaft 19c, and an L-shaped arm portion 19 is connected to one end portion of the L-shaped arm portion 19 with a cylinder shaft 15a. The cylinder 15 is connected through a binder 15, the binder shaft 20 is connected to the other end of the L-shaped arm 19, and the like. A connecting shaft 19c that integrally connects the first arm portion 19a and the second arm portion 19b is rotatably supported on the side surface of the support plate 18 on the binder side. The binder 4 and the binder support means 16 are connected by inserting the binder shaft 20 through the upper portion of the upright plate portion 4 a of the binder 4.

  On the other end of the L-shaped arm 19, a projection (not shown) extends from the surface opposite to the surface to which the binder shaft 20 is connected. The protrusion is inserted into an arc-shaped arc groove 18a formed in the vertical direction on the support plate 18, and the protrusion moves along the arc groove 18a when the L-shaped arm 19 rotates. It is supposed to be. When a tensile force is applied to the cylinder shaft 15a by the cylinder 15, the L-shaped arm portion 19 rotates about the connecting shaft 19c and the binder 4 moves up and down.

  On the side surface of the support plate 18 on the binder 4 side, a fabric thickness detecting means comprising a potentiometer 21a, a slider 21b connected to the potentiometer 21a, and a protrusion 21c extending from the oscillator 21b. 21 is disposed. The potentiometer 21a is disposed on the side surface of the support plate 18 at a position corresponding to the middle portion of the first arm portion 19a. A flat slider 21b is connected to the surface of the potentiometer 21a facing the first arm portion 19a in parallel with the first arm portion 19a. In addition, a protrusion 21c extends in the Y-axis direction at the tip of the slider 21b, and the protrusion 21c rotates while the L-shaped arm 19 rotates about the connecting shaft 19c. The part 21c is placed on the upper part of the middle part of the first arm part 19a. Therefore, the slider 21b of the potentiometer 21a rotates at the same time as the L-shaped arm portion 19 rotates.

  Therefore, the fabric thickness of the body cloth 17 and the ball cloth 5 is an L-shape that is interlocked with the lowering of the binder 4 when the binder 4 is lowered from the retracted position to the lowered position on the body cloth 17 and the ball cloth 5. It can be detected by a resistance change (voltage change) of a potentiometer 21a disposed in the vicinity of the shaped arm portion 19. Further, the voltage value data detected by the potentiometer 21a is output to a control means (not shown) to be described later.

  The large presser device 10 includes a pair of large pressers 6 placed opposite to both sides of the seam forming position on the body cloth 17 and a pair of folding plates 3 disposed above the large pressers 6. The folding device 2 for folding the ball edge cloth 5 placed on the body cloth 17, a standby position for waiting before sewing (indicated by a broken line in FIG. 1), and a final position after sewing on the downstream side in the cloth transfer direction (FIG. 1) And a moving means (not shown) for reciprocating between the two. When the large presser device 10 is moved by the moving means at the time of sewing, the body cloth 17 is pinched between the large presser 6 and the sewing machine table 8, and the body cloth 17 and the body cloth 17 are caused by the frictional force. The sewn ball cloth 5 is configured to be transferred in the cloth transfer direction (X-axis direction, the direction of arrow F in FIG. 1).

  The large presser 6 is a pair of long flat plates having an L-shaped cross section viewed from the width direction, and the seam forming position and the binder 4 are placed on the body cloth 17 with the longitudinal direction parallel to the X-axis direction. The body cloth 17 is held by being placed on both sides sandwiched. A long plate-like top plate 23 is provided on the top of each large presser 6, and a gap is formed between the large presser 6 and the top plate 23. A folding plate 3 (to be described later) is stored in this gap during standby. In addition, a replaceable rubber plate 7 is attached to the lower surface of each large presser 6.

  The folding device 2 has a long flat plate-like folding plate 3 disposed on both sides of the upright plate portion 4b of the binder 4, and the folding plate 3 is positioned above the bottom plate portion 4b on both sides of the upright plate portion 4b. It is comprised from the cylinder 26 as a folding drive means which moves between the initial positions which are separated from the baseplate part 4b of the binder 4, and waits, and the folding plate support member 25 grade | etc.,. One end of the folding plate support member 25 is connected to the upper surface of the folding plate 3, and the other end is connected to the cylinder 26, so that the folding device 2 is integrally connected.

  Each folding plate 3 is stored in the storage position of the gap portion between the large presser 6 and the top plate 23 during standby. Further, a tension spring 27 is attached between the cylinder 26 and the folding plate support member 25, and the tension spring 27 is in a contracted state when the folding plate 3 is on standby. Simultaneously with the driving of the cylinder 26, the restoring force of the tension spring 27 is applied in the Y-axis direction, so that the folding plate 3 waiting in the retracted position moves toward the folding position 2 positioned in the Y-axis direction. It is like that.

  In FIG. 4, the principal part enlarged view of the folding apparatus 2 and the vertical motion drive means 28 is shown. The vertical movement drive means 28 is disposed in the vicinity of each folding device 2 and can raise and lower the folding plate 3 of the folding device 2. The vertical movement drive means 28 is meshed with a pulse motor 29 for applying a driving force for moving the folding device 2 up and down, a pinion 30 inserted through the tip of the rotor of the pulse motor 29, and the pinion 30. It is composed of a rack 31 and the like.

  A plate-like base 32 having an L-shaped cross section is connected to the large presser device 10, and this base 32 is disposed so as to surround the cylinder 26 and the vertical movement drive means 28 of the folding device 2. . The pulse motor 29 is fixed to the upper surface of the base 32 so that the rotor extends horizontally in the direction opposite to the cloth transfer direction. Further, the side surface of the rack 31 where the teeth are not cut and the side surface of the cylinder 26 of the folding device 2 are connected and integrated, and placed on the upper surface of the base 32.

  The central portion of the pinion 30 is inserted into the tip of the rotor of the pulse motor 29, and the flat rack 31 extends in the vertical direction so that the side of the pinion 30 on the binder 4 side meshes. Yes. A pair of guides 33 parallel to the Z-axis direction are attached to the surface of the base 32 facing the rack 31 so as to be separated from each other. On the side surface of the rack 31 facing the guide 33, a gap is formed in which the guide 33 is slidable. Therefore, when the pinion 30 is rotated by driving the pulse motor 29, the rack 31 and the folding device 2 meshed with the pinion 30 are moved up and down integrally.

  The potentiometer 21a is connected to the control means via an interface (not shown). The control means includes a cylinder 15 that moves up and down the binder 4 to be controlled, a solenoid valve (not shown) that controls the operation of the cylinder 26 that switches between the storage position and the folding position of the folding plate 3, and the lifting and lowering of the folding device 2. A pulse motor 29 and the like of the vertical movement drive means 28 for controlling the above are connected via the interface. The control means includes a CPU for performing various controls, a control program for executing various functions and operations of the edge stitching sewing machine 1, control data, a ROM in which sewing data is written, and various data relating to the processing of the CPU. RAM for storing.

  Next, the operation of sewing the bead of the bead stitch sewing machine 1 of the present invention having the above-described configuration will be described with reference to FIG.

  First, at the cloth setting position, the body cloth 17 is placed at the set position on the sewing machine table 8 indicated by the marker, and the pair of large pressers 6 of the large presser device 10 is formed in parallel with the X-axis direction to form a seam on the cloth cloth 17. The body cloth 17 is held on the sewing machine table 8 by being lowered and placed on both sides of the position.

  Next, the ball edge cloth 5 is overlapped on the seam forming position of the body cloth 17 facing between the pair of large pressers 6.

  Next, by driving the cylinder 15, the binder 4 in the retracted position is lowered to the lowered position between the pair of large pressers 6, so that the respective concave portions at the tip of the binder 4 coincide with the needle drop position T. Place on the edge fabric 5.

  When the binder 4 starts to descend from the retracted position and a certain time elapses, it is considered that the binder 4 has reached the cloth holding position, and the cloth thickness 17 (the cloth cloth 17 and the ball cloth 5 are overlapped by the potentiometer 21a). FIG. 6B) is detected, and voltage value data is output to the control means. Then, the control means drives the pulse motor 29 based on the detected voltage value data, rotates the pinion 30, and moves the folding device 2 up and down via the rack 31. As a result, each folding plate 3 is also raised or lowered at the storage position. Further, the upper and lower drive means 28 is driven to move the pair of folding plates 3 from the retracted position toward the upright portion 4a side of the binder 4 to the upper position of the upper surface of the bottom plate portion 4b of the binder 4. By the driving of the folding up / down driving means 28, the body cloth 17 and the ball cloth 5 are overlapped because the height H corresponding to the cloth thickness of the body cloth 17 and the ball cloth 5 is automatically adjusted. Even if the fabric thickness changes with each sewing, the folding plate 3 can be reliably moved to the upper surface side of the bottom plate portion 4b without causing the folding plate 3 to come into contact with the bottom plate portion 4b of the binder 4 and causing poor folding. As a result, both end portions of the ball cloth 5 extending from both sides of the bottom plate portion 4b of the binder 4 (FIG. 6A) are moved to the upper surface side of the bottom plate portion 4b of the binder 4 by the movement of the folding plate 3 to the upper surface of the bottom plate portion 4b. It is surely folded along (FIG. 6B).

  Next, in a state in which the ball edge cloth 5 is folded, the two needles 11 of the sewing machine arm portion 9 a are lowered to the needle drop position T in the tip recess of the binder 4, and sewing at the needle drop position T is performed. At the same time, the large presser device 10 is gradually transferred in the cloth transfer direction by the moving means. When the large presser device 10 is transferred, the binder 4 is fixed at the lowered position, and between the large presser 6 and the body cloth 17 and between the folding plate 3 and the folded ball cloth 5, Since the frictional force works, the body cloth 17 and the ball edge cloth 5 are sequentially pulled out from the concave portion at the front end along the longitudinal direction of the binder 4, and are transferred to the needle drop position T together with the large presser device 10. The seam is formed in a state where the fabric 17 and the ball edge cloth 5 are folded along the shape of the binder 4.

  As described above, the bead stitch sewing machine 1 according to the present embodiment first includes the body cloth 17 and the ball by the cloth thickness detecting means disposed in the vicinity of the L-shaped arm portion 19 interlocked with the raising and lowering of the binder 4. The cloth thickness of the edge cloth 5 is detected. Based on the detected fabric thickness, the pulse motor 29 is driven to rotate the pinion 30, and the folding device 2 is moved up and down via the rack 31. Thereby, the pair of folding plates 3 adjusted to an appropriate height can be moved closer to the upright plate portion side of the binder 4 to perform the folding operation of the ball cloth 5. Therefore, it is possible to perform a smooth folding operation of the ball edge cloth 5 corresponding to different fabric thicknesses, and it is possible to sew a ball edge with a stable folding amount.

  In addition, this invention is not limited to the said embodiment, It shall change variously as needed. For example, as the material thickness detecting means 21, instead of using the potentiometer 21a as in the present embodiment, a sensor such as a hole pot sensor or an encoder may be disposed on the connecting shaft 19c of the binder supporting means 16. .

  Further, in the vertical movement drive means 28 of the present embodiment, the rack 31 and the cylinder 26 of the folding device 2 are connected and placed on the base 32, and the rack 31 and the folding device 2 are driven by the pulse motor 29. Are designed to move up and down as a unit. However, the side surface of the pulse motor 29 may be connected to the back surface of the cylinder 26 and placed on the base 32, and the rack 31 may be fixed to the base 33. In this case, it is not necessary to provide a gap for the guide 33 in the base 32 and the rack 31, and the pulse motor 29 and the folding device 2 are moved up and down integrally by driving the pulse motor 29.

The perspective view which shows the schematic structure of the whole bead stitch sewing machine Perspective view showing binder and binder support means Enlarged view of main parts showing binder and large presser device The principal part enlarged view which shows a folding device and a vertical motion drive means The figure which shows the sewing operation of the edge stitch sewing machine Front view showing conventional folding operation (when fabric thickness is thick (A) and fabric thickness is thin (B))

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Edge stitch sewing machine 2 Folding device 3 Folding plate 4 Binder 4a Standing plate portion 4b Bottom plate portion 5 Ball edge cloth 6 Large presser foot 7 Rubber plate 8 Sewing table 9 Sewing frame 9a Sewing arm portion 10 Large presser device 11 Double needle 12 Center Knife 13 Needle plate 14 Needle hole 15 Cylinder (binder driving means)
15a Cylinder shaft 16 Binder support means 17 Body cloth 18 Support plate 18a Arc groove 19 L-shaped arm part 19a First arm part 19b Second arm part 19c Connecting shaft 20 Binder shaft 21 Material thickness detection means 21a Potentiometer 21b Slide Moving element 21c Protruding portion 23 Top plate 25 Folding plate support member 26 Cylinder (folding drive means)
27 Tension spring 28 Vertical drive means 29 Pulse motor 30 Pinion 31 Rack 32 Base 33 Guide T Needle drop position

Claims (3)

A binder having a bottom plate portion and a vertical plate portion erected perpendicularly to the bottom plate portion, and a ball cloth that is placed on the cloth on the bottom plate portion and the vertical plate portion; and
An upper position of the bottom plate portion on both sides of the standing plate portion of the binder, a pair of folding plates disposed at an initial position spaced laterally from the previous bottom plate portion, and the folding plates at an upper position and an initial position. Each folding drive means is moved, and each folding plate is moved from the initial position to the upper position by the corresponding folding driving means, and the front end portion of each folding plate extends from the left and right ends of the bottom plate portion. In a ball stitch sewing machine comprising a folding device that folds the ball edge fabric by folding both ends of the ball edge fabric to the upper surface side of the bottom plate portion,
Cloth thickness detection means for detecting the cloth thickness of the body cloth and the ball edge cloth;
Based on the fabric thickness detected by the fabric thickness detection means, the vertical movement drive means for moving the folding plate up and down,
A sewing machine characterized by comprising   The vertical movement drive means includes a motor disposed so that a rotor extends in a horizontal direction, a pinion connected to the rotor of the motor, and a rack that meshes with the pinion and extends in a vertical direction. The bead stitch sewing machine according to claim 1, wherein the motor or the rack is fixed to the folding device.   The binder can be moved between a lowered position for pressing the ball cloth placed on the body cloth and an ascending retracted position, and the cloth thickness detecting means can be moved according to the cloth thickness when the binder is moved to the lowered position. 3. The edge stitch sewing machine according to claim 1 or 2, further comprising a potentiometer for changing a resistance value.

Images