JP3122675U - Sewing machine automatic presser - Google Patents

Abstract

The present invention provides an automatic presser for a sewing machine that combines a convex member and a link mechanism with an electromagnetic drive device, and automatically raises and lowers the presser by an electric control method to make the sewing operation smoother.
An automatic pressing device for a sewing machine, which is provided with an electromagnetic drive device, whose rotating shaft is connected to a convex member and a link mechanism provided inside the sewing machine, and is automatically lifted and lowered by an electric control method. Among them, the electromagnetic drive unit has a coil inside the iron pipe casing, the lower lid is fixed to the lower end, the bottom annular plate is installed at the lower end of the lower lid, and the holes provided on the bottom annular plate are provided. It is fixed on the positioning bolt of the lower lid, penetrated into the outer shaft of the rotating shaft, and the ball is held between the annular plate of the shaft seat and the edge plate of the outer surface of the outer tube, and rotates to the end of the rotating shaft. A C-shaped ring is installed and joined together to form an integral body, and a spring is further installed so that the rotating shaft can reciprocate.
[Selection] Figure 1

Description

The present invention relates to the design of an automatic presser for a sewing machine. More specifically, a convex member and a link mechanism are combined with an electromagnetic drive device, and a reciprocating rotation is controlled by a computer so that the presser device is automatically lifted and lowered. The present invention relates to a sewing machine automatic presser capable of performing work more smoothly.

The presser device is used to press the cloth on the sewing machine. The sewing work using a general conventional sewing machine is a manual presser device when sewing of one work article is continued and the next article is sewn. Switch the knob, rotate the convex member at the end of the knob by a certain angle to move the link mechanism upward, lift the pressing device upward, and continue the work between the two work articles, and the sewing thread may get tangled Do not. However, conventional workers need to rely on a method of manually changing the height of the presser, and there is a disadvantage that the sewing operation is interrupted and the production efficiency is lowered manually, so that the efficiency is increased. A trader provides a design that uses an interlocking mechanism and an electromagnetic drive device to automatically start the electromagnetic device and raise the holding device at an appropriate timing using a computer program.

A related design already known in the past is a proposal for improvement of a coil for a sewing machine presser of Taiwan Patent Publication No. 223871, and the design point of this proposal includes a comprehensive coil body and a plunger. It has a linear motion action by expansion and contraction, and is connected to the related mechanism of the sewing machine presser to form a proper lifting function.

The solenoid valve shown there is installed at the rear end of the sewing machine, and is far away from the presser, so a long link member is installed inside the sewing machine and indirectly linked to the presser The member is guided to control the raising or lowering of the pressing device during operation. This is because the automatic control device is installed at a distance, so the manufacturing cost required by the strength of the link member, the accuracy of assembly, and the number of parts is high due to the design of the link mechanism, and the error value is compared. Many usage disadvantages are derived from the start of use, such as the need for adjustment after a short period of use.

The design of the switching knob for lifting the conventional manual type pressing device is to install the switching knob at the upper end of the pressing device behind the sewing machine and lift it by hand when the sewing machine has finished sewing. It is. For this reason, if the conventional structure is applied and the automatic control mode is improved and the presser device that has already left the factory is improved with respect to the manual sewing machine, the production capacity of the entire factory can be improved. .

The main purpose of the present invention is to combine a convex member and a link mechanism with an electromagnetic drive device, and automatically raise and lower the presser device by an electric control method, so that the sewing operation can be performed more smoothly. It is to provide an automatic pressing device.

Another object of the present invention is to provide an automatic presser device for a sewing machine that has a simple structure of a link member coupled to an electromagnetic drive device, is easy to manufacture, and can reduce manufacturing costs.

Still another object of the present invention is to provide an automatic presser for a sewing machine that changes the manual control type structure of an existing presser to an electric control automatic mode and improves the production capacity of the entire factory.

In order to achieve the above-mentioned object, the automatic pressing device for a sewing machine according to the present invention is composed of a combination of a convex member provided in the sewing machine and a link mechanism in an electromagnetic driving device, and the electromagnetic driving device includes an iron pipe outer casing, The iron pipe outer casing has a coil installed therein, a lower lid is abutted and fixed to the lower end portion, a thin bearing is provided in the shaft hole of the lower lid, and a rotating shaft is penetrated through the thin bearing. Excessive friction with the shaft hole is prevented, a bottom annular disc is installed at the lower end portion of the lower lid, and a hole provided thereon is fixed by penetrating a positioning bolt of the lower lid. Is inserted into the iron tube outer casing, and the ball is held between the plurality of recessed grooves provided in the ring-shaped plate body of the shaft seat body and the plurality of depressed ball groove tanks provided in the iron pipe outer casing side edge plate body. And a flat surface and an annular groove are provided at the tip of the rotating shaft, After the shaft is inserted into the annular groove, the shaft seat body and the outer casing are combined to form an integral body, and a spring is installed on the plane of the rotating shaft, and is controlled under the control of a computer program. The dynamic axis reacts and rotates quickly, moves the link mechanism upward, forms the action of automatically raising and lowering the pressing device accurately, and each part is small and simple, reducing the manufacturing cost, Maintenance is also simple.

As shown in FIG. 1 to FIG. 3, the automatic pressing device for a sewing machine of the present invention is provided with an electromagnetic drive device 10, and its rotation shaft is connected to a convex member and a link mechanism provided inside the sewing machine, Among them, the electromagnetic drive device 10 includes an iron pipe outer casing 11, a coil 12, a lower lid 13, a bottom annular plate 14, a C-shaped ring 15, a spring 16, a shaft seat body 17, a rotating shaft 18, and a plurality of balls 19. The

The iron pipe outer casing 11 is provided with a space in which the coil 12 is installed. The iron pipe outer casing 11 is provided with a plurality of recessed ball groove tanks 21 on one side plate, and each ball groove tank 21 has grease. The ball 19 is installed in the shaft seat body 17, and the shaft seat body 17 has a rotating shaft 18 inserted into the outer shell of the iron pipe, and a plurality of plates provided on the annular plate body of the shaft seat body 17. Recessed grooves 22 are respectively placed on the balls 19, and the balls 19 are restricted to rotate between the ball groove tank 21 and the recessed grooves 22. The coil 12 is inserted from the piercing end of the rotating shaft 18 and accommodated in the outer casing 11, and the lower end of the coil 12 is abutted by the lower lid 13, and the shaft hole of the lower lid 13 23, a thin bearing 24 is installed, the rotating shaft 18 is penetrated through the thin bearing 24, and excessive friction with the shaft hole 23 is prevented, and the bottom annular disk 14 is installed at the lower end of the lower lid 13. A positioning bolt 25 on the lower lid 13 is inserted into a hole 26 on the bottom annular plate 14, and a contact plate 27 protruding outward is arranged in a ring shape in the center hole of the bottom annular plate 14. A flat surface 28 and an annular groove 29 are provided at the end of the rotating shaft 18, and after the C-shaped ring 15 is fitted into the annular groove 29, the lower lid 13, the outer casing 11 and the shaft seat body 17 are integrated. And the spring 16 is a plane of the rotating shaft 18. When the whole is assembled and energized, the rotating shaft 18 of the movable iron core rotates to the left side at an angle of about 25 degrees.

As shown in FIGS. 4 and 5, the electromagnetic drive device 10 pierces two protruding positioning bolts 25 into a fixing hole 31 on the back of the sewing machine head portion 30 of the sewing machine, and nuts are inserted into the penetrated positioning bolts 25. Are fixed by screwing. Further, a convex member 32 is coupled to the end of the rotating shaft 18 of the electromagnetic drive device 10 to form an interlocking operation in combination with the link mechanism, and the first link member 33 of the link mechanism has one side on the one side. Located on one side of the convex member 32, the middle step portion of the first link member 33 is pivotally mounted on the sewing machine head portion 30 by the shaft member 41, and the second link is disposed at the lower end portion of the first link member 33. A member 34 is attached to the shaft, and the second link member 34 has a hook shape with a distal end extended to have a U shape. The second link member 34 is engaged with a plate portion of the upper shaft fixing member 35 of the pressing device, and a simple link mechanism is provided. It is formed. An upper end portion of the pressing device upper shaft fixing member 35 is connected to a height adjusting shaft 36 of the pressing device 40, and a long return spring 37 is provided on the height adjusting shaft 36. When the adjustment ring 38 is screwed and the adjustment ring 38 is rotated to adjust the elevation height position, it is possible to determine the strength with which the pressing device 40 at the lower end suppresses the cloth surface.

As shown in FIGS. 5 and 6, the electromagnetic drive device 10 that has been installed is automatically controlled by a computer program. When the sewing machine reaches a certain stage, it is automatically electrically controlled and the rotary shaft 18. Generate a rotation of a certain angle, and the convex member 32 connected integrally by the rotation of the rotation shaft 18 is rotated to the left, and then the first link member 33 is rotated, and the first link member 33 is rotated. Since the middle part of the link member 33 is pivotally attached to the sewing machine head part 30 of the sewing machine by the shaft member 41, when the first link member 33 is pushed by the convex member 32, the end thereof is lifted upward, Since the end of the first link member 33 is pivotally attached to the upper end of the second link member 34 by the shaft member 42, the second link member 34 is indirectly moved upward under the interlocking action, and Of the two link members 34 End because it is locked to the shaft fixing member 36 on the adjustment shaft 35, it is possible to lift the hold-down device 40 to quickly react.

As described above, the present invention connects the electromagnetic driving device to the convex member provided inside the sewing machine and a simple link mechanism, and the operation is quickly transmitted by the electric control system, and the automatic lifting and lowering operation is accurate to the sewing machine pressing device. It has a practical design.

The description given above is based on the best embodiment of the present invention, and does not limit the scope of implementation of the present invention. The simple equivalent effects based on the claims of the present invention and the contents of the specification are described. All changes and modifications that may be obtained are deemed to be within the scope of the patent of the present invention.

It is a three-dimensional exploded view of the electromagnetic drive device of the present invention. It is a three-dimensional external view of the electromagnetic drive device of this invention. It is sectional drawing of the electromagnetic drive device of this invention. It is a three-dimensional perspective view which shows the installation state of this invention. It is a side view after installation of the present invention. It is a side view which shows the drive state of this invention.

Explanation of symbols

10 Electromagnetic drive 11 Outer cage
12 Coil 13 Lower lid
14 Bottom annular plate 15 C-shaped ring
16 Spring 17 Shaft seat
18 Rotating shaft 19 Ball 21 Ball groove tank
22 recessed groove 23 shaft hole
24 Thin bearing 25 Positioning bolt
26 hole 27 contact plate
28 Plane 29 Annular groove 30 Sewing head
31 Fixing hole 32 Convex member
33 First link member 34 Second link member
35 Shaft fixing member 36 Adjustment shaft
37 Return spring 38 Adjusting ring 40 Holding device
41 Shaft member 42 Shaft member

Claims (5)

Including an electromagnetic drive device and a link mechanism, wherein the electromagnetic drive device is installed on the back side of the sewing machine head portion of the sewing machine and on the upper end of the presser device, and the end of the rotation shaft of the electromagnetic drive device is a sewing machine. It is connected to a convex member provided inside, the link mechanism is provided near one side of the convex member inside the sewing machine, and when the convex member rotates, it contacts the first link member of the link member and indirectly The lower end portion of the second link member is lifted, and the lower end portion of the second link member is locked to the plate of the fixing member of the upper shaft of the presser device. . The link mechanism includes a first link member and a second link member, the middle portion of the first link member is pivotally mounted on a sewing machine head portion of a sewing machine by a shaft member, and the lower end portion of the first link member is The automatic presser device for a sewing machine according to claim 1, wherein the sewing machine is attached to the second link member and the end of the second link member is extended to form a U-shaped hook shape. The automatic pressing device for a sewing machine according to claim 1, wherein the fixing member is provided on an adjustment shaft, and the pressing device is installed at a lower end portion of the adjustment shaft. The electromagnetic drive device includes an iron pipe outer casing, a coil, a lower lid, a bottom annular disc, and a shaft seat body, and the iron pipe outer casing has a space for accommodating the coil therein, and is provided on one side edge plate body. A plurality of ball groove tanks are provided in a recessed shape, a ball is installed in each ball groove tank, the coil is installed inside the iron tube outer casing, the lower lid is provided with a shaft hole in the center, and the lower end of the coil Is installed at the bottom of the iron pipe outer flange, a thin bearing is fitted in the shaft hole, a positioning bolt is provided on the lower lid, and the positioning bolt penetrates into a hole on the bottom annular plate The bottom annular disk has a plurality of holes and a central hole arranged in an annular shape, and the central hole has an annular contact plate protruding outward, and the bottom annular disk is formed in the lower lid. Installed at the lower end of the shaft. A rotating shaft provided with a groove, a plurality of recessed grooves are provided on the annular plate of the shaft seat body, the rotating shaft is penetrated into the iron pipe outer casing, and the plurality of recessed grooves are the balls The balls are respectively placed on the top and restricted so that the ball rotates between the ball groove tank and the recessed groove, and the pivot shaft passes through the coil, the lower lid, the thin bearing, and the bottom annular disk, 2. The structure according to claim 1, wherein a C-shaped ring is fitted in the annular groove, and a spring is installed on the plane of the rotating shaft and between the contact plates arranged in an annular shape. Sewing machine automatic presser. 2. The electromagnetic drive device according to claim 1, wherein two protruding positioning bolts are inserted into a fixing hole on one side of a sewing machine head portion of a sewing machine, and a nut is screwed into the protruding positioning bolt. The automatic sewing machine of the described sewing machine.

Images