SU525342A1 - Device to sewing machine for cutting leather backing border with undercutting - Google Patents

Description

Union of Soviet

Socialist

Republic <>,> 525342

Government Committee

USSR ao affairs of inventions and discoveries

DESCRIPTION

Inventions

TO AUTHOR'S CERTIFICATE (61) Additional to author. certificate-wu - (22) 3April 19.02.73 (21) 1884459 / 28-12 with the addition of application No. - (23) Priority -

Published on January 25th, 2008. Bulletin No. 3

Date of publication of the description 30.01.80 (51) M. CL ^{1 2}

D 05 B 37/04 (53) UDC 687.053.

.442 (088.8) (72) The inventors

S.P. Krotov, V.V. Sysoev, L.S. Vlaskina, E.I. Supranova,

S.K. Ashratova, V.V. Eskina, Yu. A. Vladimirov, A.I. Orlov and A.K. Nikolaenko (71) Applicants

Podolsky Order of Lenin and the Order of the Red Banner of Labor Mechanical Plant. M. I. Kalinina and the Central Research Institute of the Leather and Footwear Industry —------------- (54) DEVICE FOR SEWING MACHINE FOR CUTTING UP AND REINFORCED EDGES

The invention is applied in the shoe industry with the line of edging of shoe blanks.

A device is known for a sewing machine for trimming the edges of a leather lining with undercut, comprising a case with a knife mounted therein, connected with a rod drive for reciprocating movement of the knife in a vertical plane having a gear transmission, the driven wheel of which is kinematically connected with the main shaft machines and with a rod using a crank mechanism.

In this device, the knife cuts the leather lining with a vertical cut at 90 °, as a result of which the trimmed edge, despite undercutting, is visible from the end across the entire thickness, and the knife is not adjusted relative to the semi-finished product, which reduces the quality of trimming the edges of the leather lining.

With a chain for improving the quality of cutting in the proposed device, the axis of the driven wheel is located at an acute angle to the axis of the main shaft, while the knife is mounted with the ability to move at an angle to the vertical; the kinematic connection of the crank mechanism with the rod consists of a rocker arm, a connecting link and a guide with a slide * for moving the knife in the horizontal plane there is a device consisting of a hollow eccentric with a threaded axis installed in the housing and a screw; there is also a device for turning off the knife, consisting of a spring-loaded axis with a rod and a crank with a leash connected with the rod and the body; the working part of the knife has the shape of a trapezoid.

In FIG. 1 shows a General view of the proposed device; in FIG. 2 is a diagram of the arrangement of the axes of the main shaft and the axis of the driven wheel; in FIG. 3 - a device for moving the knife in a horizontal plane; in FIG. 4 - rocker and connecting link; in FIG. 5 525342 device for turning on and off the knife; in FIG. 6 and 7 are a diagram of trimming a leather lining.

The device comprises a housing 1, a knife 2 for trimming the edges 3 of the leather lining of the shoe blank 5 and a drive for reciprocating with a spring 36, a rod 37 with a button 38, and at the other end, a crank 39 with a lead 40 passing through the holder to the rod 19 and groove 41 in the housing 1. This position of the holder corresponds to the operating state of the knife.

complete movement of the knife in a vertical plane, consisting of gear 5 fixed to the main shaft 4, which engages with the driven gear 6, mounted on the axis 7, and the axis 7 of the driven wheel is at an acute angle to the axis. the main shaft (see Fig. 2), which ensures the movement of the knife at an angle to the vertical.

The axis 7 through the crank 8 and the connecting rod 9 through the link 10 transmits the oscillating motion to the intermediate shaft 11, which through the beam 12 and the connecting link 13 transmits reciprocating motion to the crawler 14 installed in the guide 15.

. Crawler .14 through the connecting link. but 16, planted at one end on the finger 17, and the other on the leash 18, transmits reciprocating motion in the vertical plane of the rod 19, carrying the knife 2 at the end.

To move the knife in the horizontal plane, a device is used, consisting of a hollow eccentric 20 with a handle 21 mounted in a fixed support. By turning the eccentric 20 included in the groove 22 of the housing 1, the knife 2 is positioned closer to the lower knife. 23 mounted on or off the platform. To install the knife in

The knife is turned on by pressing the button 38, while the leash 40 leaves the groove 41, and the spring 33 rotates the axis 32 with a holder that carries the rod with the knife 2.

To perform the adjusting adjustments of the knife, the housing 1 is mounted movably on an axis 42 mounted in a fixed support 43 and spring-loaded with springs 44. During operation, the housing 1 is stationary.

The knife 2 has the shape of a trapezoid, the side 45 of which is cutting ²⁰ and is provided with a horizontal platform 46 for separating the leather backing 3 from the top of the workpiece 4-7.

The processed workpiece is fed to the needle of the sewing machine, while the top of the workpiece is separated from the leather pad 3 by a horizontal platform 46.

Since the knife is installed at an angle oС = 92-1.00 ° to the vertical, the cut of the leather lining is made obliquely with respect to the surface of the material, and at the same time, the position of the stitch from the edge is stable, resulting in improved cutting quality, and the edge of the leather lining is less noticeable than with ³⁵ vertical cut.

in the longitudinal direction there is a device consisting of a handle 24 with a screw 2 5 passing through an eccentric 40 20 into a threaded axis 26 installed in the hole 27 of the housing 1. When the handle 24 is rotated, its edge 28 approaches the edge 29 of the handle 21 of the eccentric 20, and the end 30 rests against the wall 31, made 45 in the handle 21; case 1, and therefore, the knife 2 is moved along the line of stitching.

To turn the knife on and off, there is a device consisting of a hollow axis 32 installed in the housing 1, with a torsion spring 33 mounted on it, one end of which with a ring 34 is fixed to the axis, and the other in the housing 1, 55 At one end of the axis 32 the holder is rigidly fixed to the rod 19, and the handle 35 on the other. In the hole of the axis 32, a spring-loaded one is installed

Claims (5)

The invention is applied in the footwear industry with the edging of shoe blanks. A device for sewing a car for trimming the leather pads with an inside is known, comprising a housing with a knife mounted therein connected with a rod and driven to move the knife back and forth in a vertical plane with a serrated gear, the driven wheel of which is kinematically connected with the main shaft of the machine and with the rod by means of a crank mechanism. In this device, the knife cuts the leather lining with a vertical cut under 90, as a result of which the trimmed edge, despite the undercut, is visible from the end across the entire thickness, and there is no knife adjustment relative to the fabricated floor of the fabric, which reduces the quality of trimming the edges of the leather lining. In order to improve the quality of trimming in the proposed device, the axis of the driven wheel is located at an acute angle to the axis of the main shaft, while the leather is mounted so that it can move at an angle to the vertical; The kinematic connection of the crankshaft-rod mechanism consists of a rocker arm, a connecting link and a guide with a slide for moving the knife in the horizontal plane. There is an adaptation consisting of a hollow eccentric with a threaded axis installed in the housing and a screw; there is also a knife cut-off device, consisting of a spring-loaded axis with a rod and a Kfm water with a lead associated with the stem and body, the working part of the knife has a trapezoid shape. FIG. 1 shows a general view of the proposed device; in fig. 2 shows the arrangement of the axes of the main shaft and the axis of the driven wheel; in fig. 3 shows a device for moving the knife in the horizontal plane of FIG. 4 shows the rocker and the connecting rod in FIG. 5 35 means for switching the knife on and off; in fig. 6 and 7 - the scheme of trimming the leather lining. The device includes a housing 1, a knife; 2 for trimming the edges 3 of the leather base of the shoe bottom and the drive for the reciprocating movement of the knife in the vertical plane, consisting of a pinion 5 fixed on the main shaft 4, which engages with the driven pinion 6, fixed on the axis 7, and the axis 7 of the driven wheel is located under the angle of the axle. the main shaft (see Fig. 2), which provides movement of the knife at an angle to the vertical. Axis 7 through crank 8 and crank 9 via link Yu transmits a swinging motion to intermediate shaft 11, which through the beam 12 and connecting link 13. Transmits a reciprocating motion to the slider 14 installed in the guide 15.. Slider .14 through connecting link. but 16, pushed at one end to finger 17 and the other to leash 18, transmits a reciprocating movement in the vertical plane of the rod 19 carrying the knife 2 at the end. To move the knife in the horizontal plane, an adaptation consisting of a hollow eccentric 200 handle 21 installed in a fixed support. By turning the eccentric 20 as it goes into the groove 22 of the housing 1, the knife 2 is positioned closer to the lower knife. 23, mounted on the platform or farther from. To install the knife in the longitudinal direction, there is a device consisting of a handle 24 with a screw 2 5, a running gear; 3 eccentric 20 into a threaded axis 26 installed in the opening 27 of the housing 1. When: turning the handle 2.4 its edge 28 fits to the edge 29 of the handle 21 of the eccentric 2O, and the end 30 abuts against the wall 31 formed in the handle 21; The casing 1, and therefore the knife 2, is moved along the stitch line. For turning the knife on and off, there is a device consisting of a hollow axis 32 installed in the housing 1 with a torsion spring 33 attached, one end of which with ring 3 is fixed on the axis and the other in the housing 32 Closed Liepower to igggpg 19, e on the other handle 35. In the hole of axis 32 on one end of the device, the spring loaded with a shotgun 24 storzhen 37 with a button 38, on the other, crank 39 with dowel 4O passing through the holder 19 and The groove 41 in the housing 1. The position of the holder corresponds to the working state of the knife. The knife blade is pressed by the button 38, while the lead 4O leaves the groove 41, and the spring 33 rotates the shaft 32 with the holder supporting the knife shaft 2. To perform the knife adjustments, the body 1 is mounted movably on an axis 42 mounted in a fixed support 43 and spring loaded 44. During operation, the housing 1 is stationary. The knife 2 has the shape of a trapezoid, the side 45 of which is cutting, and is provided with a horizontal pad 46 for separating the leather pad 3 from the top of the workpiece 4-7. The workpiece is fed to the needle of the sewing machine, while the top of the workpiece is separated from the leather base 3 by a horizontal pad 46. Since the knife is set at an angle of about 92-1.0 ° to the vertical, the leather base is cut obliquely with respect to the material surface, while ensuring stability the stitching position is from the edge, as a result of which the quality of the trim is improved, and the edge of the leather pad is less noticeable than with a vertical cut. Claim 1. Device for a sewing machine for trimming the edges of the leather podkodkladki with a podkurenie, comprising a housing with a knife mounted in it, associated with a rod and a drive for reciprocating movement of the knife in a vertical plane, having a gear, whose driven wheel is kinematically connected It is connected with the main shaft of the machine and with the rod by means of a crank-shatunny mechanism, characterized in that, in order to improve the quality of trimming, the axis of the driven wheel is located at an acute angle to the axis of the main shaft, but movable "T to the vertical. 2. The device according to claim 1, wherein the crank mechanism is connected to the rod by means of rocker, connecting link and guide with slider. 3. The device according to claim 1, wherein it is equipped with a device for moving the knife in a horizontal plane, consisting of a hollow eccentric with a threaded axis installed in the housing and a screw. 4, the device according to claim 1, in which it has a device for shutting off the knife, consisting of from a spring-loaded axis with a rod and, a crank with a leash associated with a rod and a body, 5. The device according to claim 1, that is, with the fact that the working part of the knife has the shape of a trapezium. FIG. / Fi.Z eleven / g /. THAT th 4J 12 With BUT" FIG. four