JPS5841875B2 - Shoes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single chain stitching device for tack-stitching socks, tabi, etc. in units of one or two pairs, and in particular, as shown in FIG. After attaching, several stitches 2 of a certain width are formed, and at the end of the sewing, the thread end 3 of several millimeters in length is uncut so as to remain on the surface of the label, and the sock H is basted. It was designed to do this.

Conventionally, in order to temporarily bind socks and the like with labels, etc., the binding was done manually using a thin wire frame or a material such as a stapler.

However, this work was quite tedious and inefficient, and the wire often pricked one's finger during the work, or even damaged the socks.

Furthermore, when socks are used, the temporary binding is required to be easily removed, but socks made of the materials described above do not satisfy this requirement.

Therefore, in order to eliminate the above-mentioned drawbacks, a tacking device using sewing thread has been developed, and some of these devices are now in practical use.

This machine performs basting stitches using the method shown in Figure 1, and it satisfies the above-mentioned drawbacks of the conventional sewing machine. The needle only moves up and down, moving the product left and right to form stitches of a constant width.

This has the drawback that the label affixed to the product may be misaligned or damaged during sewing, resulting in poor texture.

Also, there is a problem with thread trimming after sewing, which will hinder preparation for the next sewing.

The present invention provides a tack stitching device that eliminates all of the above-mentioned drawbacks, and when sewing, the sock with the label attached is fixed and several stitches are sewn at a constant width for each up and down movement of the sewing needle. The looper itself is structured so that it swings left and right, and the looper itself swings left and right as the needle swings.Furthermore, when sewing is completed and the machine is stopped, automatic thread trimming is performed using a thread trimming device located directly below the sewing needle. At the same time as the thread is cut, it holds the cut thread on the needle side and swings the thread cutting device while pulling the thread on the needle side, as well as swinging the looper, so that the cut thread will not be cut during the next sewing. The thread will not come out past the needle eye.

Next, in order to facilitate understanding of the apparatus of the present invention, the sewing process will first be explained.

In Figure 2, H is a sock, 10 is a sewing needle, 11at1
ib is the looper and Y is the sewing thread.

FIG. 2A shows the state in which the needle 10 is at its lowest position due to the vertical movement of the needle bar, and at this time the needle descends while swinging to the left by a mechanism to be described later.

Also, in this figure, the looper 11a is located at the bottom dead center and the needle 10
The other looper 11b is located at the top dead center.

FIG. 2B shows that the needle 10 then rises from the lowest point by the amount indicated by the arrow to form a bulge in the thread Y, and as the needle 10 rises several stitches, the loopers 11a>11b begin to swing in synchrony, and the loopers 11a reaches the top dead center, and one looper 11b reaches the bottom dead center while entering the bulge of the yarn Y.

The needle 10 continues to rise and is located at the highest position.

(Fig. 2C) Therefore, the needle thread loop is looper 11.
It is hooked by b.

The second diagram shows the state in which the needle 10 starts descending again from the highest position and reaches its lowest position, but at this time, the needle 10 descends while being swung to the right, contrary to the above-mentioned diagram 2A.

Furthermore, in conjunction with the swing of the needle 10, the looper 11a.

11b is also moved to the right by a mechanism described later.

At this time, the first loop hooked on the looper 11b is also pulled to the right.

Therefore, during the descent of the needle 10, several needles reach the lowest point while entering the first loop of the thread Y hooked by the looper 11b.

In FIG. 2E, the needle 10 is raised from the lowest point by the amount indicated by the arrow to create a bulge in the needle thread Y, with the first loop still hanging in the same state as in FIG. 2B.

As the needle rises, the loopers 11a and 11b swing, and the looper 11a reaches the bottom dead center while entering the bulge of the needle thread, and the other looper 11b is pulled out from the first loop that was first hooked. while reaching top dead center.

Figure 2F shows the needle 10 once again reaching its uppermost position, and the looper 11a has hooked the second loop so that the first loop is taut.

FIG. 2G shows the state in which the needle 10 is again swung to the left and descended to the same position as in FIG. 2A, and at this time the looper 11
a and 11b move to the left in conjunction with each other, and the second loop hooked on the looper 11a is also pulled to the left, and the needle 10 descends into the loop.

In the device of the present invention, the needle 10 and the two loopers 11at11b repeat the above-described operations several times to form several single chain stitches and perform basting stitches. When the machine stops due to completion (the hand 10 is located at the highest position).

), an automatic thread cutting device (to be described later) is activated to cut the thread while leaving a few millimeters of thread end on the surface of the sock.

In synchronization with that, the looper 11a. The final loop hooked on the looper 11a is released by making the looper 11b swing.

(When finishing sewing with this device, be sure to use looper 11.)
It will be hooked to a.

) Tack stitching is performed through the steps described above with reference to FIG. 2, and the various mechanisms for carrying out these steps will be described below.

First, a mechanism for operating the sewing needle 10 will be explained.

In Figure 3.4, 20 is an L-shaped body with a base 2.
It is formed integrally with 1.

A driving shaft 23 is rotatably disposed within the vertical frame 22 of the main body 20 and penetrates through the base 21, and transmission from a driving source (not shown) is transmitted from the lower part of the shaft through an appropriate transmission mechanism. In response, the shaft rotates.

On the other hand, the parallel frame 24 of the main body 20 includes a cam shaft 25 and an intermediate shaft 2.
6. A main shaft 27 is supported in parallel within the frame, and the respective shafts are connected by a gear transmission mechanism 28.

The rotation of the driving shaft 23 rotates the camshaft 25 via a bevel gear mechanism 29.

The rotation of this camshaft finally rotates the main shaft 27 via the intermediate shaft 26 by the gear transmission mechanism 28, and the rotation ratio between the camshaft 25 and the main shaft 27 is 1:2, that is, the rotation ratio of the camshaft 25 to the main shaft 27 is 1:2. The main shaft 27 is designed to rotate twice per one rotation.

A cam plate 31 provided with an eccentric cam groove 30 is fixed to one end of the camshaft 25, and a disk 32 is fixed to one end of the main shaft 2T.

33 is a pendulum whose upper end is pivotally supported by a pin 34, and metals 35 and 36 are fixed to the upper and lower positions of the pendulum.
Furthermore, a hollow shaft 37 is vertically fixed to the upper metal 35.

A cam roll 38 engages in the eccentric cam groove 30 of the cam plate 31 and is pivotally supported at one location of the pendulum 33.

Reference numeral 39 denotes a needle bar having a sewing needle 10 at its lower end, which is slidably fitted between the hollow shaft 37 and the lower metal 36, and has one end of a crank 40 in its intermediate portion. A pivoted member 41 is fixed.

The other end of the crank 40 is pivotally connected to one circumferential portion of the disc 32.

By configuring the sewing needle operating mechanism as described above, the rotation of the camshaft 25 is controlled by the cam groove formed in the cam plate 31.
0 and the cam roll 38 causes the pendulum 33 to swing in the left-right direction in FIG. 4 with the pin 34 as a fulcrum.

Further, the rotation of the main shaft 27 causes the needle bar 39 to slide into the hollow shaft 37 due to the movement of the crank 40, and as a result, the sewing needle 10 is moved up and down.

When the disc 32 makes the first rotation, the cam plate 31 makes a 1/2 rotation (clockwise in FIG. 4), so the sewing needle 10 tilts to the left according to the movement of the pendulum 33. You will move up and down while doing so.

When the disc 32 makes the next rotation, the cam plate 31 makes the remaining 1/2 rotation, so the sewing needle 10 now moves up and down while tilting to the right.

As described above, the sewing needle of the present invention operates by swinging the iron nail from side to side with each reciprocating movement of the needle 10 up and down.

Next, a mechanism for operating the looper 11at11b in synchronization with the movement of the sewing needle will be described.

In FIGS. 3.4 and 6, the loopers 11a, 1
1b is fixed to one end of looper shafts 50a and 50b fitted in holes between two frames of the sliding frame 51.

As shown in FIG. 6, the sliding frame 51 has a rectangular shape, has two metals 52 and 53 and a guide shaft 54 integrally formed, and is disposed on the back surface of the base 21.

In order to slidably hold the sliding frame 51 on the back surface of the base, two guide holding members 55 and 56 are fixed to the back surface of the base, and one member 55 supports one side of the sliding frame 55. The other member 56 is structured to fit into the guide shaft 54 and support the sliding frame.

Reference numeral 57 denotes a sliding shaft that penetrates between the metals 52 and 53 of the sliding frame 51 and is slidably supported; a bracket 58 is fixed to one end of the sliding shaft on the metal 52 side; By applying a spring 59 between the metal parts 53, the sliding shaft 57 is normally always urged upward in FIG.

Another bracket 60 is fixed to the intermediate position of the sliding shaft 5T.

As shown in FIG. 4a, this bracket 60 has an arm 61 inclined to the left, and the end of this arm and the middle part of a swinging member 62 formed in an arc shape are connected by a pin 63.

Further, at both ends of the swinging member 62, arms 64a and 64b extending from the looper shafts 50a and 50b are connected to the pins 6.
5a and 65b are combined.

Therefore, by sliding the sliding shaft 57 in the direction of the arrow in FIG. 4a, the looper 1 is fixed to the looper shafts 50a and 50b.
As a result, 1a and llb undergo rocking motion via the rocking member 62.

Reference numeral 66 denotes a swing lever for sliding the sliding frame 51 in the direction of the arrow in FIG. do.

The swing lever 66 is pivotally supported by a shaft 69 at its intermediate portion, and has a cam roller 70 pivotally attached to its other end.

Reference numeral 71 denotes a cam disk fixed to the driving shaft 23 directly under the back surface of the base 21, and an eccentric cam groove 72 formed on its circumferential surface.
A cam roller 70 of the lever 66 is fitted into one place inside.

A boo IJ integrally formed on this cam disc 71
The belt 75 that is attached to -74 is attached to a pulley 76 that is pivotally supported at the other corner of the sliding frame 51.

A cam 17 is integrally formed on the pulley 76, and a lever 78 extending from the bracket 58 is always in contact with the circumferential surface of the cam 77 due to the bias of the spring 59.

As described above, by configuring as described above, the cam disk 71
When the cam roller 70 makes one rotation (counterclockwise in FIG. 6), the cam roller 70 follows the cam groove 72 of the cam disc, and the bar 66 swings back and forth between the solid line position and the line 73 position in FIG. 6. Then, the sliding frame 51 is slid back and forth in the direction of the arrow.

Furthermore, one rotation of the cam disk 71 causes another pulley 76 to rotate once through the pulley 74 and the belt 75, so that the sliding shaft 57 is slid back and forth with the bracket 58 by the cam 77 on the pulley 76. Therefore, as described above, the loopers 11a and 11b perform a swinging motion.

Next, a mechanism for operating the automatic thread cutter and swinging the looper after sewing is completed will be explained.

In FIGS. 3 to 5, 100 is a fixed blade having an upper blade 100a and a lower blade 100b with a certain gap, and the movable blade 101 swings within the gap between the fixed blades. Sewing thread Y is cut.

Figure 3a shows the movable blade 101 swinging into the gap between the fixed blades 100 and cutting the thread Y. As can be seen from this figure, the upper blade 100a of the fixed blade 100 has a cutting blade. Since it is not formed, the thread cannot be cut.

Therefore, since the thread is cut by the movable blade 101 and the lower blade 100b, the thread end a on the needle 10 side after cutting is cut by the upper blade 100b.
It is held between the movable blade 101 and the movable blade 101.

In this state, the fixed blade 100 itself is oscillated by a mechanism to be described later to pull the thread, thereby creating a needle 1 for the next process.
Even during zero movement, the cut thread will not come out of the needle hole.

On the other hand, the other yarn end Y2 remains several millimeters from the surface of the sock H and is cut.

The fixed blade 100 is integrally formed with a boss 102 at its distal end.

Further, the movable blade 101 located in the gap between the upper blade 100a and the lower blade 100b of the fixed blade 100 is rotatably supported at its intermediate portion by a shaft 103 fitted in the boss 102. .

The boss 102 further includes an L-shaped plate 104 at its upper end.
The plate 104 is pivoted at one point of a bracket 105 fixed to one end of the parallel frame 24 of the main body by a shaft 106.

107 is the fifth plate 104, that is, the fixed blade 100.
In the figure, it is a spring that always urges counterclockwise rotation around the shaft 106, and the urging is maintained by the abutment 108 of the bracket 105.

Reference numeral 109 denotes a lever in which one end of the movable blade 101 is pivotally connected to a shaft 110, and its shape, as can be seen from the figure, is a part 111 bent at a right angle in front of the plate 104 and a part 111 bent at a right angle above the plate. The folded portion 112 straddles the plate 104 and is secured to a bracket 113 at its distal end.

A sliding shaft 114 is slidably supported together with a guide shaft 116 by a guide bracket 115 attached below the vertical frame 22 of the main body, and a bracket 113 to which the plate 109 is fixed is fixed to one end of the sliding shaft.

And the guide bracket 115 and the bracket 113
A spring 167 is disposed concentrically with the sliding shaft 114 between both end faces of the spring 167 .

Since the spring 116 urges the bracket 113 to the right in FIG. 5, the movable blade 101 is always rotated clockwise about the shaft 103 via the plate 109.

One end of the sliding shaft 114 and one end of the guide shaft 116 fix a bracket 117 .

Reference numeral 118 denotes a lever that is pivotally attached to the shaft of the rotary solenoid 119, and a pin 121 implanted in one position of the bracket 117 is engaged in a long hole 120 formed at one end of the lever.

Therefore, when the rotary solenoid 119 is energized, the lever 118 moves in an arc of a certain angle from the position shown by the dotted line in FIG. 3, and as a result, the sliding shaft 114 slides to the left.

The leftward sliding of the shaft 114 causes the bracket 113 to move in the same direction against the reaction force of the spring 167.

As the bracket 113 moves to the left, the movable blade 101 first rotates around the shaft 103 in the direction of the arrow (FIG. 5) and cuts the sewing thread Y.

Along with this cutting, as described above, the thread end on the sewing needle 10 side is held by the movable blade 101 and the upper blade 100a of the fixed blade.

As the bracket 113 further moves to the left, the first perpendicularly bent part 111 of the lever 109 fixed thereto comes into contact with the side of the plate 104, and then continues to move while in contact with the side of the plate 104. Fixed blade 100
will swing around the shaft 106 (clockwise) against the reaction force of the spring 107.

In this way, pull out the thread end on the needle side.

Next, a mechanism for operating the stopped loopers 11 a and 11 b independently from the sewing needle 10 and in conjunction with the thread trimming mechanism will be described.

In FIG. 4.5, reference numeral 150 denotes a lever supported by a shaft 151 at the center of the base 21, and the sliding shaft 114 and the guide shaft 116 are inserted into a long hole 152 formed at one end of the lever. A pin 154 provided at one location on the fixed bracket 153 is engaged.

Meanwhile, the other end of the lever 150 is pivotally connected to one end of another short lever 155.

The lever 155 is fixed to a rotatable shaft 156 that passes through the base 21 on the back side, and this shaft has another lever 157 fixed on the back side of the base.

158 has two levers 159 above and below it at different angles,
The swing member 160 is pivotally supported by a shaft 161 on the back surface of the base.

An arm 16 is attached to the end of one lever 159 of the swinging member 158.
One end of the arm 162 is pivotally connected, while the other end of the arm 162 is pivotally connected to the end of the lever 157 described above.

Further, the other lever 160 of the swinging member 158 is connected to the sliding shaft 5.
7q) Located in contact with one end.

Therefore, the sliding shaft 57 slides due to the swinging of the lever 160, and as a result, the looper 11a.

11b will be subjected to a rocking motion.

The swinging movement of the lever 160, that is, the swinging member 158, is performed by energizing the rotary solenoid 119.

The rotary solenoid 119 is energized by the sliding shaft 11
4 and move the bracket 153 together with the lever 150,
155 is swung from the solid line position in FIG. 5 to the line 163 position.

The swing is caused by the shaft 156 and the lever 1 on the back of the base.
57, the swinging member 158 is finally moved to the sixth position via the arm 162.
The sliding shaft 57 is rotated about the shaft 161 from the position shown by the solid line in the figure to the position shown by the line 164.

Next, the operation of the apparatus of the present invention will be summarized below.

As shown in the front view of FIG. 3, the drive shaft 23 is rotated counterclockwise in FIG. 6 by receiving transmission from a drive source (not shown) from its lower portion via a suitable transmission mechanism.

The rotation of this driving shaft 23 is controlled by a cam disk 7 fixed to the shaft.
1, and the cam plate 31 on the camshaft 25 and the disc 32 on the main shaft 27 are rotated in synchronism via the bevel gear mechanism 29.

Further, the rotation of the cam disk 71 also causes the other pulley 76 on the sliding frame 51 to rotate in synchronization via the boo IJ-74 and the belt 75.

The sewing needle 10 shown in FIG. 4 is stopped at the uppermost position.

Due to the rotation of both the cam plate 31 and the disc 32, the sewing needle 10 is first rotated to the left (the cam plate 31 is rotated clockwise in FIG. 4).

) as it begins to descend.

In the state shown in FIG. 2A, that is, when the sewing needle 10 reaches the lowest point while swinging to the left, the cam plate 31 has been rotated by 1/4 and the disk 32 has been rotated by 1/2.

Then, both of them continue to rotate further to raise the sewing needle 10, but just before this, that is, just before the sewing needle 10 reaches the lowest point, the lever 78 of the bracket 58 is gradually moved by the cam 77 on the pulley 76. By being moved downward in FIG. 6, the loopers 11a and 11b begin to swing.

The cam 77 is timed so that when the sewing needle 10 is raised by the amount indicated by the arrow in FIG. 2B, the looper 11 a t 1 l b is completely swung.

Therefore, the loopers 11a and 11b swing from the position A to the position B in FIG. 2, and as a result, the looper 11b forms the first loop.

And looper 11a. Next, the sewing needle 11b is swung to the right until it reaches the lowest point by the cam 77. condition).

The cam plate 31 and the disk 32 continue to rotate, and when the cam plate 31 rotates 1/2 and the disk 32 rotates once, the sewing needle 10 reaches the uppermost position as shown in FIG. 2C. However, just before reaching this top position, the looper 11 a t 1 l b remains in the above state.
It starts moving downward in the figure (to the right in Figure 4).

The movement of the loopers 11a and 11b is caused by the rotation of the cam disk 71, which causes the lever 66 to start swinging due to the action of the cam groove 72 and the cam roller 70, and gradually move the sliding frame 51 downward in FIG. 6 (to the right in FIG. 4). It is done by moving towards the

When the sewing needle 10 next descends while swinging to the right, the sewing needle 10 passes through the first loop formed in the looper 11a and reaches the lowest point.

(At this time, the cam plate 31 rotates 3/4, and the disc 32 rotates 3/4.
It rotates twice.

) Then, from just before the sewing needle 10 reaches the lowest point to just after it rises, the lever 78 of the bracket 58 is gradually returned to its original position by the rotation of the cam 77 and the bias of the spring 59, contrary to the above. Karasashi looper 1
1a and 11b swing as shown in FIG. 2E, and as a result, a second loop is formed in the looper 11a.

Subsequently, the sewing needle 10 continues to rise, and the lever 66 gradually swings back due to the shape of the cam groove 72 of the cam disk 71 just before reaching the highest position, so that the loopers 11a and 11b Contrary to the above, it moves to the left, that is, to the position shown in FIG.

When the sewing needle 10 reaches the highest position (FIG. 2 F),
The cam plate 31 rotates once, and the disk 32 rotates twice,
Also, the cam disk 71 and the cam 77 each make one revolution, completing one cycle of the sewing operation of this device.

Note that the loopers 11a and 11b shown in FIG. 2C and F
shows the state immediately before the sewing needle 10 reaches the highest position.

The sewing operation of the device of the present invention is performed by repeating the above cycle several times to form a number of stitches 2, for example, about 8 stitches, and then the driving shaft 23 is stopped by a command from a control device (not shown), while the thread is threaded. The rotary solenoid 119, which activates the cutting mechanism, will be energized.

When the rotary solenoid 119 is energized, the thread cutting mechanism is activated as described above, and the sewing thread Y is cut leaving a few millimeters of thread end Y2 on the sock side as shown in FIG. 3a.
While holding the thread end Y1 on the 0 side, the thread cutting mechanism is caused to swing and the thread end Y1 is pulled out.

The lever 160 is moved by the mechanism described above in conjunction with the operation of the thread cutting mechanism, so that the looper 11
atllb swings independently from the sewing needle 10, and as a result,
The final loop hooked onto the looper 11a will be removed.

As explained above, the device of the present invention forms a seam of a constant width while sewing the sock by swinging the sewing needle 10 from side to side with each reciprocation of the up and down movement of the sock. In addition, with regard to thread cutting after sewing, the mechanism is used to hold and pull out the thread end on the sewing needle side as well as the uncut thread, so all the drawbacks seen in conventional devices are eliminated.

Furthermore, when using the socks, the temporary binding can be easily removed by simply pulling the cut end of the thread, leaving a few millimeters remaining.

[Brief explanation of drawings]

FIG. 1 is an overall view of a sock temporarily bound by the apparatus of the present invention. FIGS. 2A to 2G are simplified diagrams showing the sewing process of the apparatus of the present invention. FIG. 3 is a side view of the device of the present invention. FIG. 3a is a partial view showing a state in which the thread cutting mechanism operates to cut the thread. FIG. 4 is a front view of the device of the present invention. FIG. 4a is an enlarged view of the looper swing mechanism. FIG. 5 is a top view of the thread trimming mechanism. FIG. 6 is a back view of the device of the present invention. In these figures, H... sock, 10...
...Sewing needle, 11at11b...Looper,
Y...Sewing thread, 21...Base, 23
....driving shaft, 25...camshaft, 21.
...Main shaft, 31...Cam plate, 32...
...Disc plate, 51...Sliding frame, 71...
・Cam disk, 77...Cam, 100...
・Fixed blade, 101...Movable blade, 109...
. . . rotary solenoid, 158 . . . indicates a swinging member, respectively.

Claims (1)

[Claims] 1. A camshaft 25 driven by a driving shaft 23 and a main shaft 2
7 is provided, and an intermediate shaft 26 is provided to set the rotation ratio of the camshaft and the main shaft to 1:2. A pendulum 33 is swingably supported on a line connecting the pendulums, and a hollow shaft 37 supporting a needle bar 39 having a sewing needle 10 at the lower end of the pendulum is fixed vertically, and are connected by a crank 40, and a substantially rectangular sliding frame 51 is slidably held directly below the back surface of the base 21, and a sliding frame 51 is slidably held in the substantially central portion of the sliding frame in the sliding direction. A looper shaft 50a supports a shaft 57 and has loopers 11a and 11b fixed to one end thereof in a direction perpendicular to the sliding shaft. 50b, which connects the sliding shaft and the looper shaft with a series of link mechanisms, and connects the sliding shaft and the looper shaft with the back driving shaft 2 of the base.
A cam disc 71 is fixed to the cam disc 71, and the cam disc and the sliding frame are connected by a swing lever 66, and a boo IJ-74 integrally formed on the lower surface of the cam disc and the sliding frame The belt 75 is passed between the pulleys 76 that are pivoted at one corner of the frame.
The movement of the belt drives a cam 77 integrally formed on the boo 9-76, and the reciprocating movement of the sliding shaft 57 due to the rotation of the cam drives the looper 11a,
The fixed blade 1 is configured such that the blade 11b makes one reciprocating swing movement with one rotation of the driving shaft, and is composed of an upper blade 100a and a lower blade 100b, which have no cutting edge formed on the upper blade directly below the sewing needle 10.
00 in a swingable manner, a movable blade 101 is swingably provided in the gap between the upper blade and the lower blade, and a rotary solenoid 119 causes the fixed blade 100 and the movable blade 101 to swing.
A lever 160 that engages with one end of the sliding shaft 57 is pivotally supported, and the lever is connected to the rotary solenoid by a link mechanism and the sliding shaft 114, and the loopers 11 a and 11 b are connected to the rotary solenoid. 1. A temporary stitching device for socks, etc., characterized in that, after sewing is completed, the rotary solenoid is energized to swing back and forth once.