JPH041909Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention controls the positioning of the edge of the fabric fed to the needle drop of a sewing machine at a predetermined position in the direction perpendicular to the fabric feeding direction on the near side of the needle drop. The present invention relates to a dough edge control device.

BACKGROUND ART As a dough edge control device, a device for controlling the dough of a cylindrical dough is well known from Japanese Patent Application No. 59-219290 and Japanese Patent Application Laid-open No. 56-89294.
This is a technique in which a cylindrical piece of fabric is placed outside a rotating ring for controlling the edge of the fabric, and then fed to the needle drop of a sewing machine while controlling the edge of the fabric using the rotating body.

For this reason, sheet-like fabrics that are not cylindrical cannot be applied to this device.

However, in recent years, with the diversification of sewing methods, there has been a growing demand for fabric edge control even for sheet-shaped fabrics that are not cylindrical. For example, when it comes to briefs, in the past it was common to sew rubber to the edge of the opening after sewing it into a tube shape, but recently, rubber has been sewn to the edge of the fabric before sewing it into a tube shape. It is also done.

In such a sewing method, in order to sew the rubber to the edge of the fabric, it is necessary to control the edge of the fabric, which is not cylindrical. At present, control of the edges of such non-cylindrical fabrics relies solely on the manual labor of the operator.

This manual work is carried out as follows, for example.
That is, a fabric edge regulating device is attached to the front side of the sewing machine's needle drop and protrudes above the fabric supply surface of the sewing machine, and the fabric is controlled by moving the fabric so that the fabric edge comes into contact with this device. Alternatively, the fabric edge control is performed by visual measurement without attaching a fabric edge regulator.

Problems to be Solved by the Invention However, manual work requires skill and is difficult to save labor. The present invention was devised in view of the above-mentioned problems, and an object of the present invention is to provide a dough control device with high usability that can automatically control dough without relying on the manual labor of an operator.

Means for Solving the Problems In order to achieve the above object, the present invention positions the edge of the fabric fed to the needle drop of a sewing machine at a predetermined position in front of the needle drop in a direction perpendicular to the fabric feeding direction. In order to control the fabric feeding direction, a plurality of fabric edge control rollers are driven separately from the fabric feeding roller along the circumferential surface of the fabric feeding roller, which is rotatably provided around a horizontal axis perpendicular to the fabric feeding direction. The dough edge control device is rotatably provided around an axis perpendicular to the axis of the dough feed roller, and the dough edge control roller is provided in a state protruding from the circumferential surface of the dough feed roller, This is a helical gear that meshes at right angles with a drive-side helical gear provided on a concentric shaft that can rotate relative to the dough roller. The dough supply surface under the roller is recessed according to the outer diameter of the dough feed roller, the dough is passed between the recess and the dough feed roller, and at least two of the dough edge control rollers It is characterized by the fact that the fabric is pressed against it.

Operation With the above configuration, the dough edge control roller is a helical gear that meshes at right angles with the drive-side helical gear provided on the concentric shaft that can rotate relative to the dough feed roller, so the dough edge detection sensor When the drive-side helical gear is driven based on the detection result, the helical gear meshing with the drive-side helical gear at right angles, that is, the dough edge control roller, bites its tooth tips into the dough and runs perpendicular to the dough supply direction. You can reliably control the fabric in the direction you want. Further, at least two fabric edge control rollers protruding from the circumferential surface of the fabric feeding roller are pressed against the fabric into a depression formed in the fabric feeding surface portion according to the outer diameter of the fabric feeding roller. By doing so, the fabric can be fed reliably in synchronization with the fabric feeding speed of the sewing machine without causing the fabric to slip or be pulled abnormally. Therefore, the occurrence of slack in the fabric can be prevented, so that the detection sensor can effectively detect the edge of the fabric, and the position of the edge of the fabric can be accurately controlled.

Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 5. Fig. 1 is an external perspective view showing the main parts of the fabric edge control device according to the present invention, Fig. 2 is a plan view showing the entire device of the present invention, Fig. 3 is its front view, and Fig. 4 is its left side. It is a diagram. The device of the present invention is provided from the front to the right side of the needle drop 1 through which the sheet-like fabric 2 for briefs, for example, is fed from the front side to the rear side (in the direction of the white arrow). A column 10 is provided on one side to support the entire device. This column 10 has two drive motors 21,
A swinging section 30 having a dough edge control tool 20 driven by a shaft 22 at its left tip is supported by the front half of a pivot 11 whose rear half is supported by a column 10 so as to be swingable in the vertical direction. , the fabric edge control tool 20 is located in front of the needle drop 1.

The rear half of the pivot 11 is supported by a planar U-shaped shaft support member 15 fixed to the column 10, and is rotatable by a bearing 12 interposed in this support portion. In addition, 16 is the shaft support member 1
This is a collar for positioning the bearing 12 relative to the bearing 5, and is fixed to the pivot shaft 11 with a bolt (not shown).

The swinging section 30 includes a planar U-shaped frame 31 whose right end is fixed on both sides to the front half of the pivot shaft 11, and the drive motors 21 and 22 which are respectively fixed to the left end end frame 31a. and the above-mentioned tip frame plate 31
A bearing 32 fixed to the lower end of a, and this bearing 3
2, a shaft 3 is rotatably supported at a position near the proximal end;
3, and the dough edge control tool 2 fixedly attached to this tip.
0. Note that 31b is a bolt 3 in order to maintain a constant gap on both sides of the right end of the frame 31.
These are 1C fixed spacers, and are provided above and below with the pivot 11 in between.

The fabric edge control device 20 includes a fabric feeding roller 23 fixedly attached to the tip of the shaft 33 and located in front of the needle drop 1, and a plurality of fabric feed rollers 23 provided in the circumferential direction of the roller 23, 12 in this example. fabric edge control rollers 24
The fabric feeding roller 23 is configured such that the driving force from the drive motor 21 is applied to the drive pulley 25 attached to the rotor shaft 21a of the drive motor 21 and the driven pulley 34 attached to the right end of the shaft 33. It is configured to rotate by being transmitted to the rotary belt 35.

One of the dough edge control rollers 24 is rotatable around an axis perpendicular to the axis of the dough feeding roller 23.
In addition, a portion thereof is provided to protrude beyond the circumferential surface of the roller 23. Further, the roller 24 is a helical gear that meshes at right angles with a drive-side helical gear 36 that is provided on the outer peripheral surface of the intermediate portion of the shaft 33 so as to be rotatable relative to the roller 23. This dough edge control roller 24 passes through the tip frame plate 31a and is engaged with a drive pulley 26 attached to the rotor shaft 22a of the drive motor 22 and a driven pulley 37 attached to the right end of the drive side helical gear 36. By transmitting the rotational force of the drive motor 22 to the rotated belt 38, the belt 38 rotates independently from the cloth feeding roller 23.

A cylinder 13 is attached to the support plate 12a fixed to the upper end of the support column 10, with the advancing direction of the cylinder rod 13a facing downward, and furthermore, a transmission piece 3 that extends forward and sideways is attached to the tip of the cylinder rod 13a.
9 is attached, and the front end of this transmission piece 39 abuts from above against the right end of the swinging piece 14 whose left end is fixed through the pivot 11 between the column 10 and the swinging part 30. It's summery. That is, as shown in FIG. 5, the transmission piece 39 has different positions in a plane, and extends from the tip of the cylinder rod 13a to the swinging piece 1.
The acting force of the cylinder 13 is transmitted to the right end of the cylinder 4. Note that 14a is a split bolt for tightening a split provided on the swing piece in order to fix the swing piece 14 to the pivot shaft 11.

Therefore, the force of advancing and retracting the cylinder rod 13a is transmitted to the pivot shaft 11 as a rotational force, and as a result, the swinging portion 30 fixed to the pivot shaft 11 swings. Specifically, when the cylinder rod 13a advances, the dough edge control tool 20 rises as shown by the two-dot chain line in FIG. Due to this descent, the dough edge control roller 24 presses the dough 2 being fed on the dough supply surface from above.

An arc-shaped recess 3 is formed on the dough supply surface onto which the dough edge control tool 20 descends. This recess 3 has a radius of curvature equal to the radius of the fabric feed roller 23 plus the protrusion length of the fabric edge control roller 24, so that two or more fabric edge control rollers 24 can simultaneously press the fabric. It is designed to be
The reason why 12 fabric edge control rollers 24 are provided as described above is to make this possible.

On the fabric supply surface between the needle drop 1 and the position where the fabric edge control tool 20 descends, a fabric edge detection sensor 5 such as an optical position sensor for detecting the position of the edge 2a of the fabric 2 is installed.
is provided so that the position detection direction is orthogonal to the fabric feeding direction, and the detection result of this detection sensor 5 is given to a motor controller (not shown) that controls the rotation direction and amount of rotation of the drive motor 22, and is used to control the fabric edge. The rotation direction and amount of rotation of the roller 24 are controlled by the drive motor 22, and the roller 24 is rotated by a desired amount, for example, in the direction of the arrow indicated by the broken line in FIG. Thereby, the position of the edge 2a of the fabric 2 is adjusted in the left-right direction.

On the other hand, the drive motor 21 that drives the fabric feed roller 23 is controlled by a controller (not shown) so that the rotational speed of the fabric feed roller 23 changes in synchronism with the fabric feed speed of the sewing machine. Thereby, the fabric 2 placed between the fabric edge control tool 20 and the needle drop 1 does not become too tight or too loose.
In addition, in FIG. 1, the roller 7 provided on the left side of the needle drop 1 is used to prevent the feeding of the 2 parts of the fabric on the left side of the needle drop 1 from being delayed compared to the part fed to the needle drop 1. The shaft is rotationally driven by a rotating belt 6.

Effects of the Invention As explained above, in the present invention, the dough edge control roller is a helical gear that meshes with the drive side helical gear at right angles, so that the dough can be detected based on the detection result from the dough edge detection sensor. When controlled, the tooth tips of the helical gear bite into the fabric and drive.
The dough can be reliably controlled in a direction perpendicular to the feeding direction. In addition, by pressing the fabric with at least two fabric edge control rollers into the recesses provided on the fabric supply surface, the fabric does not slip or become abnormally stretched, and the fabric feed speed of the sewing machine can be adjusted. This makes it possible to reliably feed the fabric in sync with each other. In addition, this prevents the occurrence of slack in the fabric, allowing the detection sensor to effectively detect the edge of the fabric, as well as accurately controlling the position of the edge of the fabric. This eliminates the complicated work that used to take place.

Further, the dough edge control roller is configured with a helical gear that meshes at right angles with a drive-side helical gear that can rotate relative to the dough feed roller, so that the dough feed roller and the dough edge control roller are integrated. It can be installed compactly and with a simple structure, and has excellent effects with high usability.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing the main parts of the fabric edge control device according to the present invention, Fig. 2 is a plan view showing the entire device of the present invention, Fig. 3 is its front view, and Fig. 4 is its left side. FIG. 5 is a right side view of a cylinder for swinging the swinging section. 1...needle drop, 2...fabric, 2a...fabric edge, 5
...Dough edge detection sensor, 20...Dough edge control tool,
23...Dough feeding roller, 24...Dough edge control roller.

Claims (1)

[Claim for Utility Model Registration] In order to position the edge of the fabric fed to the needle drop of a sewing machine at a predetermined position in the direction perpendicular to the fabric feed direction on the front side of the needle drop, A plurality of fabric edge control rollers are driven separately from the fabric feeding roller along the circumferential surface of the fabric feeding roller, which is rotatably provided around a horizontal axis orthogonal to the fabric feeding roller. A dough edge control device rotatably provided around the dough edge control roller, wherein the dough edge control roller is provided in a state protruding from the peripheral surface of the dough feed roller, and has a concentric shaft that is rotatable relative to the dough feed roller. This is a helical gear that meshes at right angles with the drive-side helical gear provided above, and while the drive-side helical gear is driven based on the detection result of the dough edge detection sensor, the dough supply surface portion below the dough feed roller is A recess is formed in accordance with the outer diameter of the feed roller, the fabric is passed between the recess and the fabric feed roller, and the fabric is pressed by at least two of the fabric edge control rollers. Dough edge control device.