JPH0718380Y2 - Inner curl removal device for cloth in sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for removing the curl of a cloth in a sewing machine, for example, by edging the edges of two superposed cloths with an overlock sewing machine. In this regard, the present invention relates to a device suitable for preventing or removing the fabric edges from being caught in each other.

(Prior art) Generally, the peripheral edge of a knitted fabric is easily curled, and in order to sew the edge, the curl must be corrected and fed under the presser foot of the sewing machine. Kaisho No. 51-1156 (Unclaimed withdrawal), Jitsuko Sho 62-4566
No. 2 is proposed. However, in the former case, a simple rod-shaped or plate-shaped rigid body was inserted from the outside of the fabric edge to the inside, and depending on the type of cloth, the nature of the curl, the shape of the cloth edge, the feeding direction, etc. The problem is that the curls are not always removed. Also,
In the latter case, the outer sandwiching plates are pressed onto the upper and lower surfaces of one inner sandwiching plate with springs, and the cloth is guided so as to be sandwiched between the sandwiching plates to guide the cloth along the guide portion having the special shape of each sandwiching plate. The curl of the fabric edge is sequentially removed by squeezing the edges, but knitted fabrics that easily curl generally have poor dimensional stability and are crimped with a sandwich plate to remove the curl. When moved in the closed state, that portion is stretched and contracted after sewing, causing a wavy phenomenon.

(Problems to be solved by the invention) Therefore, the invention is capable of surely removing the curl generated at the edge of the cloth and guiding the cloth under the presser foot of the sewing machine without stretching the cloth. An object is to provide a removal device.

(Means for Solving the Problems) That is, according to the present invention, the upper and lower outer sides are inclined with respect to each other, and the edges directed from the adjacent ends to the distant ends are formed into a plate shape, and when the plan view shows the curved shape. The cloth guide body is formed so as to present, and the cloth guide body is placed with its proximal end immediately in front of the presser foot of the sewing machine. The guide edges are sandwiched between the cloth edges so that the edges of the cloth feed along the curved edges of the plate, and the curls of the cloth are removed by the curved edges as the cloth advances. The curved edge is preferably a convex curved shape, and is bent in a direction intersecting with the cloth feeding direction at the cloth feeding side, that is, at the mutually adjacent ends. Further, it is desirable that this edge portion is formed in a thin plate shape so as to be rolled up even in a curl having a small diameter, and the entire cloth guide body is formed by bending the thin plate.
A brim-shaped thin plate portion may be formed. If the vertical distance between the edges on the side of the separated edge is 12 to 20 mm, it is easy to assist the cloth guide with the fingertips.

Also, the mounting member of the cloth guide body to the sewing machine is formed of a circular pipe,
It is also possible to blow pressurized air on the inside of the cloth curl.

(Operation) When the cloth edges are arranged along the plate-like curved edges as described above, the cloth edges of the upper and lower cloths respectively wind up the plate-like curved edges on the front side of the cloth supply, that is, the separation end side. However, when the cloth is fed in the direction of the sewing machine, when the cloth edge crosses the curved edge, the rolled-in portion is expanded and the curl is removed, and then the cloth edge is aligned with the outer surface of the cloth guide body. It is guided under the presser foot of the sewing machine while being flattened. Since the curved edge is plate-shaped, even if the curl has a small radius of curvature, the curl can be rolled up and the curl gradually expands as the cloth is fed. The curl is smoothly removed without being influenced by the direction or the direction of cloth feeding. In this invention, since the cloth is not pinched or forced to be squeezed, there is no possibility that the cloth is stretched when the curl is removed. Further, when the compressed air is used together, the effect of removing the curl of the cloth can be further enhanced.

(Embodiment) An embodiment in which the present invention is applied to an overlock sewing machine will be described with reference to the drawings. That is, as shown in FIGS. 2 and 3, the cloth guide 5 is provided on the needle plate 3 and the cross plate 4 below the presser foot 2 of the overlock sewing machine 1.
This cloth guide body 5 is formed by bending a semi-circular metal plate and folding it in half to join the upper and lower pieces 6 and 7 together at the radius portion, and the outer surfaces 6a and 7a thereof as shown in FIG. The edges 6b, 7b of each are slanted as shown.
Has a fan-shaped arc shape as shown in FIG. 1, and the upper and lower outer surfaces 6a, 7a are formed so as to be connected to each other by a conical curved surface from the proximal end 8 to the spaced end 9, and the cloth A hollow 10 is formed inside the guide body 5. The cloth guide body 5 has its lower side surface 7a opposed to the upper side of the needle plate 3 and the cross plate 4 with a slight clearance, and the adjacent ends 8 of the upper and lower side surfaces 6a and 7a come under the tip of the presser foot 2 of the sewing machine. In addition, the arc-shaped edges 6b and 7b are arranged so as to be on the front right side as shown in FIG. 1, and are bent in the vicinity 11 of the proximal end 8 to cut the cutting line of the knife 12 for cloth edge cutting. It is projected in a direction almost orthogonal to the extension line or slightly forward. In the figure, 12
a is an upper knife, 12b is a lower knife, and 13 is a sewing needle.

Further, a hollow shaft 15 made of a bent circular pipe and having a blowout hole (not shown) in the cloth guide body 5 is provided on the protruding portion 14 for attachment to the sewing machine provided on the proximal end 8 side of the cloth guide body 5. It is fixed. This hollow shaft 15 is the first support plate for position adjustment.
It is fitted to a horizontal bearing 17 provided in 16 so as to be rotatable and slidable, and its mounting angle and front-back position can be arbitrarily adjusted so that it can be fixed with a screw 18. Also, this first
The support plate 16 is fixed to the second support plate 21 by screws 19 and 20, and the position of the support plate 16 is horizontally rotated about the screw 19 with the hole into which the screw 20 is fitted being a long hole. It is possible.

Further, the second support plate 21 is provided with an elongated hole 22 in a direction substantially perpendicular to the bearing 17 of the first support plate 16, and a lower surface 23 along the elongated hole 22 is provided with 23 (FIG. 3). , This long hole 22
A third support plate 26 having a dovetail groove 25 by a screw 24 fitted to
Installed on. Further, a third support plate 26 is a horizontal part having the dovetail groove 25, and a support tool for attaching an auxiliary device of the sewing machine.
It consists of a vertical part connected to 27, and in the normal position,
The second support plate 21 is horizontally moved in a direction orthogonal to the cloth feeding direction so that its position can be adjusted. The support
27 is a fixing member 29 which is attached to the sewing machine 1 with a screw 28.
And a rotating member 31 attached to the fixing member 29 by a screw 30 so as to be rotatable in the horizontal direction.
The third supporting plate 26 is attached to the vertical piece provided on the above with screws 32. Although not shown, a protrusion that is supported by a spring on the upper surface of the rotating member 31 is fitted into a recess provided in the groove 33 on the lower surface of the fixed member 29. Can be fixed at a position orthogonal to the cloth feeding direction, and the cloth guide body 5 or each supporting plate and the rotating member 31 can be fixed.
When they are strongly pulled, they are integrally rotated about the screw 30 toward the front so that they do not hinder work such as threading of the sewing machine.

In such a device, as shown in FIG. 4, two cloths W1 and W2, which are easily wound inside each other when they are overlapped with each other, are inclined with the cloth guide body 5 inside, as shown in FIG.
When it is supplied so as to cover it from the outside of the
Is the edge 6 as the fabric advances, as shown in cross sections A, B, and C.
It is spread in contact with b and 7b and naturally flattened, and thereafter guided by the outer side surfaces 6a and 7a and the protruding portion 14 while being kept straight, and guided under the presser foot 2. In addition, this cloth W1, W
At the time of supplying 2, the right hand is usually attached to guide the cloth edge to the correct position, but since the fingertips are inserted into the cavity 10 of the cloth guide body 5, the cloth guiding work is easy. Further, if the compressed air is sent to the hollow shaft 15 that supports the cloth guide body 5, the curl removing action is further enhanced.

(Effect of the Invention) This invention surely flattens the curls of the cloth edges that are easily rolled into each other regardless of the thickness of the cloth, the shape of the curls, the shape of the cloth edge, and the feeding direction of the cloth, and supplies the curl to the sewing machine. In addition, since the cloth is not pressed or stretched, there is an effect that a good-looking product can be obtained without causing a wavy phenomenon on the cloth surface after sewing.

Further, if the cloth guide body is formed of a plate-shaped object, it is lightweight and the assisting operation with fingers is easy.

[Brief description of drawings]

1 is a plan view of an embodiment of the present invention, FIG. 2 is a perspective view of a sewing machine equipped with the embodiment, FIG. 3 is a side view of the same, and FIG. 4 is a perspective view showing the operation. 2: presser foot, 3: needle plate, 4: cross plate, 5: cloth guide, 6
a, 7a: Outer surface, 6b, 7b: Edge, 8: Proximity end, 9: Separation end, W1, W
2: cloth, K: curl

Claims (2)

[Scope of utility model registration request] 1. An upper and lower outer side surfaces are inclined with respect to each other, and the edges of the cloth guide body, which are formed by plate-like objects having curved ends, are formed on the sewing machine. Two cloths are placed on the cloth supply surface immediately before the presser foot with a gap, and the cloth edges are easily rolled up inside each other when they are piled up. In the apparatus for removing the curl of a cloth in a sewing machine, which is supplied from the separated end side along the curved edge and removes the curl of the cloth by the curved edge, the cloth guide body is a semicircle. The plate is folded in two and the upper and lower pieces are joined at the radius to form the proximal end, and the upper and lower outer surfaces are connected by a conical curved surface from the joined proximal end to the spaced end, and inside Characterized by forming a funnel-shaped cavity Winding curl removal device. 2. The upper and lower outer side surfaces are inclined with respect to each other, and the edges of the cloth guide body extending from the adjacent ends to the separated ends are formed by plate-like objects having curved ends. Two cloths are placed on the cloth supply surface immediately before the presser foot with a gap, and the cloth edges are easily rolled up inside each other when they are piled up. In the device for removing the curl of the cloth in the sewing machine in which the curl of the cloth is supplied along the curved edge and the curl of the cloth is removed by the curved edge, the curl of the cloth is changed from the separated end to the proximal end. An inner curl removing device, characterized in that the leading edge is formed in a fan-shaped arc shape and is bent in a direction intersecting the cloth feed direction in the vicinity of the proximal end.