KR101365472B1 - Apparatus for rotation wiper of sewing machine - Google Patents

Abstract

The present invention relates to a rotary wiper device of a sewing machine.

The present invention penetrates through the needle bar and the sewing needle, the fixing member coupled to the lower head of the sewing machine; A fastening member coupled to the fixing member; Power generating means coupled to the fastening member to generate a driving force; A power transmission means connected to the power generating means to transmit power; And a wiper connected to the drive of the power transmission means to be rotatable in a predetermined angle range.

According to the present invention, after rotating the fastening member connected to the wiper by the desired angle around the needle bar, it is easy to rotate the wiper within a predetermined angle range to hold the thread trimmed from the sewing object in any direction, and improve the sewing quality. There is an effect that can be improved.

Sewing Machine, Wiper, Solenoid, Needle Bar, Sewing Needle

Description

Apparatus for rotation wiper of sewing machine

1 is a perspective view showing an example of a sewing machine

2 is a side view of a conventional sewing machine wiper device

3 is a front view of a conventional sewing machine wiper device

Figure 4 is a front view showing the assembled state of the rotary wiper device of the sewing machine according to an embodiment of the present invention

Figure 5 is an exploded perspective view showing the configuration of the rotary wiper device according to the present invention

6 is a side view of a rotary wiper device according to the present invention;

Description of the Related Art

100: fixing member 110: fastening member

120: power generating means 122: solenoid

124: plunger 126: fixing bracket

130: power transmission means 131: first link member

133: second link member 135: elastic means

140: wiper device 150: wiper

160: fastening member fixing means 162: connecting piece

164: spring 170: head

180: needle bar

The present invention relates to a sewing machine, and more particularly to a rotary wiper device of the sewing machine.

1 is a perspective view showing an example of a conventional sewing machine, Figure 2 is a side view of the wiper device shown in Figure 1, Figure 3 is a front view of the wiper device shown in Figure 1, during the sewing operation of the sewing machine (M) Thread T is an important factor that influences the next sewing quality.

That is, if the length of the thread T coming out from the needle hole of the sewing needle 1 is too long, the extra thread T remains at the beginning of sewing, and the appearance is not good, and if the length of the thread T is too short, the initial sewing The nodule is not made with the lower thread of the needle, which causes the needle to skip.

After the seal T is cut off, it is removed from the object to be sealed by the wiper device 2. The wiper 25 of the wiper device 2 moves across between the sewing needle 1 and the object to be stitched, and is removed from the object by hanging the thread T when crossing.

At this time, the conventional wiper 25 is to be pulled up the thread (T) while operating only in one direction of the left and right (左右), when the direction of the thread and the sewing direction is different, the trimmed residue There was a problem of deterioration of the sewing quality caused by the phenomenon that is seen to the outside without being buried in.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is easy to remove the thread thread from the sewing material in any direction, thereby rotating the sewing machine can improve the sewing quality The present invention provides a wiper device.

The object of the present invention described above A fixing member penetrating the needle bar and the sewing needle and coupled to the lower part of the head of the sewing machine; A fastening member rotatably coupled to the fixing member; Power generating means installed on the fastening member to generate a driving force; A power transmission means connected to the power generating means to transmit power; And it is achieved by a rotary wiper device of the sewing machine comprising a wiper linked to the drive of the power transmission means rotatably connected to a predetermined angle range.

Preferably the outer peripheral surface of the fixing member in the present invention is characterized in that the screwed to the inner peripheral surface of the fastening member.

In addition, in the present invention, a through hole having a 'T' shaped cross section is formed along the longitudinal direction of the fastening member, and the connection hole is in communication with the through hole in a vertical direction.

In addition, the present invention further comprises a fastening member fixing means for maintaining a coupling state between the fastening member and the fastening member is coupled through the connection hole of the fastening member, the fastening member fixing means, the screw thread at one end The connection piece is formed, and the spring is mounted on one side of the connection piece, it is characterized in that consisting of a mood bolt for pressing the spring is mounted on one side of the spring.

In addition, the power transmission means in the present invention, the first link member connected to the power generating means, the second link member assembled to the fastening member through the one end from the rear of the first link member, and the first A rocking member connected to the other end of the two link members and oscillated in the up and down direction, a cam member connected to the swinging member to convert the up and down rotation into a rotational movement, and a shaft member rotated by the rotational movement of the cam member. It is characterized by including.

In addition, the present invention is characterized in that it further comprises an elastic means mounted between the fastening member and the second link member.

Hereinafter, the rotation wiper device of the sewing machine according to the present invention according to the accompanying drawings in detail as follows.

Figure 4 is a front view showing the assembly state of the rotary wiper device of the sewing machine according to an embodiment of the present invention, Figure 5 is an exploded perspective view showing the configuration of the rotary wiper device according to the present invention, Figure 6 is a rotation according to the present invention As a side view of the wiper device, the rotary wiper device according to the present invention largely includes a fixing member, a fastening member, a power generating means and a power transmission means, and a wiper.

As shown in FIGS. 4 and 5, the fixing member 100 has a ring shape in which a central portion is opened so that the needle bar 180 and the sewing needle 182 can pass therethrough. The through hole 104 is formed along the longitudinal direction of both ends, and the bolt 106 is coupled to the screw hole 172 formed on the bottom surface of the head 170 through the through hole 104.

The fastening member 110 has a hexahedron shape as shown in FIG. 5, and has a through hole 114 having a 'T'-shaped cross section along a longitudinal direction at an inner surface central portion thereof, and an upper portion of the through hole 114. A thread 112 for screwing the outer circumferential surface of the fixing member 100 is formed along the circumference, and the connection hole 116 communicates with one side of the through hole 114 in a vertical direction.

4 to 6, the power generating means 120, the solenoid 122 is a screw 128 on the outer side of the fastening member 110 through a fixing bracket 126 having a box shape Is fixed through.

4 to 6, the upper end of the first link member 131 bent in a step shape is coupled to the plunger 124 of the solenoid 122 as shown in FIGS. 4 to 6. One end of the second link member 133 that is bent in an approximately '>' shape is assembled with the screw 134 to the fastening member 110 at the rear of the first link member 131.

In addition, the screw 136 is assembled to the fastening member 110 through the central portion of the second link member 133 and the elastic means 135 behind the second link member 133, wherein the elastic means Reference numeral 135 is a torsion coil spring, in which the screw 136 is assembled to the fastening member 110 by passing through a spring body 135a having a coil shape of the elastic means 135, and from the spring body 135a. A radially extending end support arm 135b is inserted and supported by the fastening member 110, and the other end working arm 135c of the elastic means 135 is inserted and supported by the second link member 133. do.

In addition, the upper end of the swinging member 137 having an elliptic shape is coupled to the other end of the second link member 133 by a screw 137a, and the lower end of the swinging member 137 is a cam member of the wiper device 140. 144 and screws 137b are assembled to the support plate 142.

The wiper device 140 shown in FIGS. 5 and 6 has a configuration similar to the wiper device 2 shown in FIGS. 1 to 3, and the support plate 142 is provided with a screw (ie, a lower end of the outer surface of the fastening member 110). 142a) assembled, the fastening bolt 146 is connected to the cam member 144 through the shaft member 148 and the support plate 142, the wiper 150 is installed through the shaft member 148 It is.

On the other hand, in order to maintain a coupling state between the fixing member 100 and the fastening member 110, the present invention further comprises a fastening member fixing means 160, the fastening member fixing means 160, Figures 4 and As shown in FIG. 5, a connection piece 162 having a screw thread is inserted into one end of the connection hole 116 formed in the fastening member 110, and a spring 164 is provided at one side of the connection piece 162. Mounting, the mood bolt 166 is mounted on one side of the spring 164 to press the spring 164.

In addition, after the push button or toggle switch (not shown) is installed on one side of the sewing machine for the operation of the solenoid 122, it is preferable to electrically connect to the solenoid 122. Accordingly, each time the pushbutton is pressed once, the pushbutton can be turned on / off by a set time.

Hereinafter, the operation of the present invention having the above-described configuration will be described.

When the cut thread (T of FIGS. 1 and 2) is to be removed from the object to be sewn by the wiper device according to the present invention, when the operator grasps the fastening member 110 and rotates it by a predetermined angle, the fastening member 110. Is moved to the desired angle while the state of engagement with the fixing member 100 is released.

Subsequently, when a current is applied to the solenoid 122, the plunger 124 is repeatedly pulled toward the solenoid 122, and at this time, the push button can be turned on / off by a set time every time the push button is pressed once. .

When the plunger 124 is pulled, the first link member 131 is also pulled toward the solenoid 122 together with the plunger 124, wherein the support arm 135b of the elastic means 135 is connected to the fastening member. Fixed to 110, the working arm 135c is inclined by a predetermined angle toward the support arm 135b.

In addition, when the first link member 131 is pulled toward the solenoid 122 side, one end of the second link member 133 is rotated in a clockwise direction to swing the rocking member 137 in the downward direction, As the cam member 144 connected to the rocking member 137 rotates in the counterclockwise direction, the shaft member 148 is rotated so that the wiper 150 initially moves from the horizontal state with the fastening member 110 to fasten the fastening member. It moves (falls) perpendicular to the state 110.

On the other hand, when the first link member 131 is pulled toward the solenoid 122 together with the plunger 124, the operating arm 135c of the elastic means 135 is subjected to a force to restore to its original state by a restoring force. Therefore, this restoring force is transmitted to the rocking member 137 through the second link member 133 so that the rocking member 137 swings upward.

Accordingly, while the cam member 144 is rotated in the clockwise direction, the wiper 150 moves to the original position and moves to the horizontal position with the fastening member 110.

That is, the cam member 144 converts the cam member 144 into a rotational motion while the rocking member 137 repeats the up and down rocking action by the compressive force and the restoring force of the elastic means 135 according to the operation of the solenoid 122. The wiper 150 connected to the member 144 is rotated within an approximately 90 ° angle range.

As described above, while the wiper 150 is rotated by the driving of the solenoid 122 (see FIG. 4), it is possible to remove the thread T removed from the object to be sewing during the sewing operation by walking on the wiper 150.

In the above process, since the fastening member 110 can rotate 360 ° on the outer circumferential surface of the fixing member 100, the fastening member 110 does not interfere with the presser foot (4 in FIG. 1) for each type of sewing machine. After moving to the desired angle about the needle bar (1b in Figure 2), and then driving the solenoid 122 and the wiper 150, to remove the thread (T) removed from the object to be removed by lifting It is easy to do so, the thread cut together with the thread supplied during the next sewing operation is buried in the sewing material can be sewn to improve the quality of the sewing material.

On the other hand, the fastening member fixing means 160 maintains the coupling state between the fastening member 100 and the fastening member 110 to prevent the separation between the fastening member 100 and the fastening member 110. That is, when vibration is generated in the fastening member 110 during the driving of the solenoid 122, the screw coupling between the fastening member 110 and the fastening member 100 is released to fasten the fastening member 110 to the fastening member ( Separation from 100) may occur.

In the present invention, since the connecting piece 162 is pressing the outer circumferential surface of the fixing member 100 coupled to the fastening member 110 through the mood bolt 166 and the spring 164, the fastening member 110 is fixed member ( It is possible to prevent the separation from 100).

As described above with reference to the drawings illustrated a rotary wiper device of the sewing machine according to the present invention, the present invention is not limited by the embodiments and the drawings disclosed herein and various by those skilled in the art within the technical scope of the invention Of course, modifications can be made.

As described above, according to the present invention, after rotating the fastening member connected to the wiper by a desired angle around the needle bar, the wiper is rotated within a predetermined angle range to cut the thread from the sewing object in any direction. It can be effective.

In addition, there is an effect that can improve the sewing quality through easy removal of the thread trimmed.

Claims (6)

A fixing member penetrating the needle bar and the sewing needle and coupled to the lower part of the head of the sewing machine; A fastening member rotatably coupled to the fixing member; Power generating means installed on the fastening member to generate a driving force; A power transmission means connected to the power generating means to transmit power; And And a wiper coupled to the drive of the power transmission means so as to be rotatable in a predetermined angle range. The method according to claim 1, Rotating wiper device of the sewing machine, characterized in that the outer peripheral surface of the fixing member is screwed to the inner peripheral surface of the fastening member. 3. The method of claim 2, A through-hole having a T-shaped cross section is formed along a lengthwise direction of the fastening member, and a connecting wiper is connected to the through hole in a direction perpendicular to the through-hole. The method of claim 3, Is coupled through the connection hole of the fastening member further comprises a fastening member fixing means for maintaining the coupling state between the fastening member and the fastening member, The fastening member fixing means, Rotating wiper device of a sewing machine, characterized in that consisting of a connecting piece having a threaded portion at one end, a spring mounted on one side of the connecting piece, and a mood bolt mounted on one side of the spring to press the spring. The method according to claim 1, The power transmitting means includes: A first link member connected to the power generating means, a second link member assembled to the fastening member through one end from the rear of the first link member, and connected to the other end of the second link member in a vertical direction; Rotating wiper device for a sewing machine comprising a rocking member swinging, a cam member connected to the rocking member for converting the up-and-down oscillation into a rotational movement, and a shaft member rotated by the rotational movement of the cam member. 6. The method of claim 5, And a resilient means mounted between said fastening member and said second link member.

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