JPS60103991A - Looper assembly of sewing machine for closing bag by two yarns and formation two-yarn loop for closing bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] a. INDUSTRIAL APPLICATION FIELD OF THE INVENTION This invention relates to the field of two-thread bag closing sewing machines and includes an improved looper assembly for two-thread sewing machines and a method for making two-thread phrases. There is.

mouth. Prior Art Two previous generation sewing machines supported primary and secondary thread spools that fed the primary thread into the needle sight and the secondary thread into feed chambers located below the throat plate. This secondary thread is brought into alignment with the primary system during suturing to create a thread chain by the interaction of the reciprocating needle and roux 7 assembly. In known two-light bag-closing machines, the looper body utilizes a structurally complex thread-bearing component that typically undergoes many different mechanical movements. Typically, it is costly and costly for the components to create and follow complex paths that involve both rocking and thrusting movements in two or more intersecting planes on two or more sides of the needle. . Such structurally complex components and mechanical movements increase the cost, require more working space, and increase the possibility of breakage and frequency of repair, whereas simple shapes and easy to manufacture , and it would be highly desirable to have a two-thread looper assembly that utilizes simple minimal mechanical interlocking in one plane. No known two-thread bag-closing machine utilizes a looper that moves in a simple arc in a single plane.

Another drawback of known two-thread sewing machines is that some utilize a looper that projects across the needle path at an angle of about 90° to the direction of bag movement. This looper orientation results in greater thread wear and tear, as the thread is first pulled normally in the direction of bag movement, then abruptly stopped, and then pulled in a direction perpendicular to the bag flow direction. May cause breakage.

It would be desirable to have a simplified and improved two-thread looper device that could be used on both large stationary and lightweight portable sewing machines.
jf < The looper of a portable sewing machine with two threads, which are prized because the sleeves and the place are continuous, is streamlined f? ii It is particularly important to have a simple structure and mode of movement. The present invention is based on U.S. Pat.
8.9 7 [Portable j of the general type shown in No. 1
Particularly well suited for use in sewing machines to close bags.

These patents have a looper blade that moves in only one plane but can be used for conventional suturing of one thread.
Disclose a sewing machine that closes portable bags of book thread.

C. In recent years, there has been a need for sewing machines to close two thread bags. This has increased due to the increasing need for double sutures in the bag, and in some cases certain government regulations require such sutures. According to the present invention, +14 construction is simple, and in order to eliminate the complex construction and movement associated with prior art two-thread loop-making devices, exactly one plane on one side of the needle is used. An improved looper assembly is obtained that moves along a simple arc within the looper.

The present invention includes an improved looper assembly for a two-thread sewing machine that is more economical, reliable, and easier to manufacture than currently available two-thread looper devices.

An improved looper assembly embodying the present invention utilizes only the single oscillating, reciprocating motion described above, and avoids the multiple planes, complex paths of prior art two thread loopers. , utilizes a looper blade that swings through an entire arc in only one plane and passes only on one side of the needle.

The improved Looper V works with a needle plate that is fully equipped with a thread retention notch leading to the needle hole through which the needle plate passes. −The loop of the secondary thread and the secondary thread is made of looper blades, notches,
and the thread roof on the underside of the needle plate which directs the thread roof to intersect the needle path, thereby creating a well-tied thread chain.

The looper blade utilizes an upright post, an elongated, cantilevered arm, and a eyepiece at the free end of the arm. The intersection of the post and the arm forms a hook that captures and inserts the roof of the thread during suturing.

23 action Unlike the action of the prior art looper, the present invention has a 45°
Angles between 10° and 20' are preferred, utilizing a looper blade that moves in a plane intersecting the direction of the bag's interlocking at smaller angles. By avoiding the orthogonal orientation of prior art loopers, thread wear and breakage can be reduced and looper reliability is increased. The loops of the secondary thread are all stitched together by the side stitches of the bag by swinging the arms of the looper in a direction opposite to the direction of the bag's movement while inserting it into the roof of the primary thread supported by the needles. It can be used for total tightening.

A method of stitching the money and a method of performing the planar movement kbf of the looper are also disclosed.

These and other objects of the invention will become readily apparent when reading the following description in conjunction with the accompanying drawings in which the same numerals are used once in each drawing.

C. Embodiment Referring now to FIG. 1, a portable two-thread bag closing sewing machine 10 embodying the invention has a rigid protective housing 20 and/or a screw threaded into the housing. A spool holder fixed to the sewing machine 10 by 15 supports brackets 12 and 14, and the brackets -
It holds spools 16 and 18 that constitute a secondary yarn and a supply source for the secondary yarn.

The bag-closing machine 10 includes a carrying handle 22 mounted on a housing 20 and an electric motor 24, which is energized by a power cord 26 and a hand-operated switch (not shown) on the handle.

The electric motor 24 has a pulley 25 fixed to the upper end of its shaft, and the V-belt 28 wraps around the pulley 25 of the electric motor,
It then extends to a second pulley 30 fixed to the upper end of the main drive shaft 32 of the sewing machine.

The main drive shaft 32 is connected to the housing 20 in a generally vertical orientation.
The rotary function is attached to the inside. electric motor 24, motor vehicle 2 suitably mounted to each other and to the housing;
5 and 30, belt 28, and rotatably mounted drive shaft 32 together constitute a complete drive system useful in the present invention for moving the components of sewing machine 10. Although the particular drive system disclosed herein is preferred, it is to be understood that other types of motors and drive trains may be substituted if desired, and such substitutions are within the scope of this invention. .

Shaft 32 supports a needle drive eccentric 34 connected to a needle drive lever 36 which extends downwardly through the housing and is connected to other known components for reciprocating needle drive shaft 38 back and forth. ing.

Eccentric wheel 34, lever 36, needle drive shaft 38, needle 40, and other known intermediate parts together form a needle drive assembly for moving needle 40 across the entire path 150 for needle threading during suturing. It makes up the body. The illustrated needle drive assembly is well known in the art and is disclosed in U.S. Pat. No. 4,348,97.
As it is fully disclosed in No. 0, it will not be described further. However, the particular needle drive assembly described herein is merely illustrative of one type of needle drive assembly that may be used with the present invention and is intended to be used to reciprocate needle 40 in path 150. It is to be understood that any other suitable mechanical device may be substituted and is within the scope of the invention.

The primary thread 41 originating from the spool 16 extends through certain bores 43 and 45 and finally reaches and passes through the sight 47 (FIG. 2) of the needle 40.

The lower end of the drive shaft 32 is configured so that the rotation of the drive shaft 32 in the direction 31 is
Feed dog block γ6 (FIGS. 2, 8, and 10) in an offset eccentric feed dog cam 56 which is rotatably supported in the feed dog cam 56 (FIG. 10).

A looper cam 44 is fixed to the drive shaft 32, having an eccentric groove 46 formed in its lower surface that extends into the groove 46 and engages a cam follower 48 therethrough during rotation of the looper cam 440. The follower 48 is a rotatably mounted looper shaft having a central vertical axis 53! 1III11
It extends in one direction from the arm 50 of the follower fixed to 1I52.

The looper shaft 52 extends downwardly at an angle of approximately 14.5 degrees from vertical through a bearing not shown for simplicity and has a pv-harney=pv-harney=pv-harney= at its lower end as further described below.
) It supports 54. When the main drive shaft 32 rotates about its central axis in the direction 31, the looper cam 44 rotates with it and causes the follower arm 50 to swing the looper shaft 52 and move the looper unit 54.
is oscillated back and forth through an arc of approximately 28°.

Referring now to FIG. 2, the housing 20 includes a delivery chamber 58 within which the looper drive shaft 52 and the main drive shaft 32 extend and in which the loop making operations of the sewing machine are performed. The open bottom of the delivery chamber 58 is closed during operation by a removable cover plate 60 which is firmly attached by screws 62 screwed into holes 63 in the chamber wall. The delivery chamber has a port 64 in its side wall covered by a generally flat, slightly angled throat plate 66.
The throat plate 66 has a significant cooperative interaction with the looper unit 54, as will be explained further below. A third cover plate 35 is attached to the housing over the needle drive shaft 38 by screws 3γ.

A conventional, well-known presser foot complete assembly is mounted within the housing and is forced by a spring 70 toward the throat plate 66 and passes through the presser foot, which retains the bag between the presser foot and the feed dog during suturing. It includes a shaft 68 that supports a presser foot 72 (FIG. 2) which cooperates with a feed dog 78 for mating purposes.

Referring now to FIGS. 1 and 2, a feed assembly 74 that can be used with the present invention is inserted into the feed chamber for rotation in a small circular path centered on the central longitudinal axis of shaft 32. 58 , such rotation being in response to rotation of an eccentric feed dog cam 560 rotatably received in a bearing bore in feed dog block 76 . Feed dog 18 has teeth 79 (FIG. 9) extending outwardly from the delivery chamber through slots 82 and 84 in needle plate 66. A plurality of sliding rods are used in the feed dog block to guide it during its circular movement; such guide rods are known in the art;
It has been omitted from the drawing to simplify the drawing and to better visualize the looper assembly, which will be described later.

The feeder assembly 74 includes a block 76, an attached feed dog 18 that cooperates with the presser foot 12, and a cooperating sliding bar that carries the feed dog and supports it within the chamber 58. A more detailed description of the feed assembly is found in U.S. Pat. No. 4,548,970.

Although the illustrated feed assembly is preferred for use with the present invention,
Other suitable feed and duplex assemblies may be substituted and are within the scope of the invention.

Next, referring to FIGS. 1, 2, and 12, the lower end of the looper drive shaft 52 is connected to the looper block 86.
And a removable and replaceable looper plate 88'! i=includes tLr looper unit 54e is supported. Block 86 is bifurcated and has a socket 87 for receiving looper shaft 52. An Allen screw 89 is bifurcated onto the shaft 52 to firmly secure the block to the shaft in a predetermined angular orientation.

As best shown in FIGS. 5, 12, and 18-20, the looper blade 88 is an upright, straight, solid post 92 having a central axis 94.
and an elongated, cantilevered thin arm 96f extending outwardly at right angles to the column 92. A column axis 94;
Thin arms 96 intersecting it create a plane oriented approximately perpendicular to axis 52. Adjacent to the free end 98 of the arm is a looper eye 100 that supports a loop of secondary yarn 102. The front and back surfaces 104 and 106, respectively, of the blade arm 96 are substantially flat so that the blade arm 96 passes closely adjacent to the needle 40 as the blade moves in its path 107? Pressure, end 9B to make it easier
It has a 91-karat gold slanted edge. It has been found that it is most effective if the length of arm 96, measured from its intersection with post 92, is approximately equal to four times the diameter of needle 40. However, the arms can be made a little longer and still be effective. Arm 96 and post 92 have hooks 18 at their intersection for engaging loops 172 in the loop making process.
I am making 2. When the shaft 52 swings through the arc A', the post 92 and the looper blade 88 move to positions 192 and 194 (
12 and 19) through an arc A'5 of approximately 28°.

The path 107 followed by the blade 88 is an arc that passes directly adjacent to the needle path 150. The looper blade, as best shown in FIG.
Note the movement in (Figure 19). This plane is directly adjacent to needle path 105 and is stationary with respect to the needle path and parallel to path 150. The lower end of the post 92 is provided with a flat surface 101fil- and is received in a socket 108 at the upper end of the looper block 86, the post having an Allen screw 110 pressing against the surface 101.
is held firmly within socket 108 by. 5th A
As best shown in the figure, the flat surface 101 is connected to the arm 96
is oriented 5° from the exit angle of the post 92, thereby helping to place the post within the socket 108 so that the arm 96 is in close proximity to the needle 40. The arm 96 has a thread slot 210 extending from the eye 100 to the arm end 212 for receiving the secondary thread 102, as will be further described. The slot 210 of the delay P88 is at a 5° angle with the lower edge 214 of the arm to more easily align the thread 102 with the tunnel 120 in the full feed dog block.

The secondary thread 102, supported by the looper eye 100, leaves the secondary thread spool 18 and feeds its free end 103 through the needle hole 112 of the throat plate 66 and extends outwardly from both chambers. In order to reach the feed chambers 58, the secondary yarn extends from the spool 18 through the housing 20 along a guide path 114 (Fig. 1). After the yarn 102 exits the guide path 114, it winds around the yarn guide 116, and then winds up in the groove 118'.
t-extends through and into both chambers 58. As best shown in FIGS. 2 and 19, the secondary yarn 102 enters the feed chambers 58 and then enters the tunnel 1 in the feed dog block.
After passing through the thread 20, it extends into the thread slot 210 and passes through the looper eye of play P88. The tunnel 120 has its axis aligned generally with the direction of the elongated cantilever arm 96, thereby minimizing friction and resistance between the feed dog block and the arm 96 during relative motion of the feed dog and arm. , and is oriented within the forwardly extending portion 216 of the feed dog block. However, the tunnel 120 is designed as shown in FIG. 19 because the resistance applied to the thread 102 by the guide 116 biases the thread 102 into the thread slot 210 and retains it within the slot during suturing. It is placed in front of the arm 96. Thread 10 extending along arm 96 as a result of use of slot 210
2 is forced to be within the plane 200 in which the looper moves. The ends 218 and 220 of slot 210 are rounded to reduce friction between the slot and the thread.

An alternative embodiment 230 of a looper blade that can be used with the present invention is shown in FIG. The blade 230 is
Completely identical to blade 88 of the previous drawing, except that the angle between blade 92 and lower edge 214 of arm 96 is 85°, and makes a 5° angle with thread slot 21υ or edge 214. It's the same. The looper blade having an angle yx between the column 92 and the edge 214 of the arm 8 [Jo and IDLl' is
It works effectively for sewing machine 10 (but the angle is 85° and 9 (J'
I have found that the best results are obtained when the blades are between 4I and 8NIII.

Next, referring to FIGS. 6 to 5, the throat plate 66
plate 66 has inner and outer surfaces 124 and 122, respectively, and a threaded hole 126 extends through the throat plate for receiving screws (not shown) to securely attach the copper plate to the housing.
It has a pair of elongated parallel slots 82 and 84, which receive the groove 79 of the feed dog 78 and engage the bag to move it past the needle. In order to press the bag and cooperate with presser foot 72, the island is passed through the slot to an external force. An elongated portion 128, integral with copper plate 66, is placed between slots 82 and 84, and The portion 128 extends from the web 130 to the web 132.
2 and 124, through which the needle 40 moves during suturing. There is a thread retention notch 134 created that cooperates with the blade 88 to place the secondary thread in a predetermined orientation suitable for suturing and looping. 1'. Lower surface 12 of throat plate 66
4 is a plurality of horizontally extending reinforcing ribs 14 that strengthen the board.
1.

A ramp-shaped splendor bar 138 has a value t5 and a surface 1 on the lower surface 124 of the portion 128 upstream of the button hole 112.
24 to orient the loop of secondary thread 166 to facilitate insertion of the downwardly moving needle 40 into the loop of secondary thread 166, as will be explained later. In order to achieve this, the looper blade 88 cooperates.

Regarding the '4h VTC, the user of the sewing machine first threads the primary thread 41 and secondary thread 1027 through the eye 47 of f81 and the eye 100 of the looper along appropriate guides, respectively.
Advance the thread through the eye. When the sword is in the raised position 140 shown in FIG. For simplicity, in the following description of the operation of one sewing machine, the primary system 41 cooperating with the needle 40 is shown in black, and the loop 7
The secondary yarn 102 cooperating with the unit 54 is shown in white.

In Figure $2] in the form of an automatic transmission, the 9 bacteria 178 are in the outermost position of the knotweed, while its teeth 79 & 1
, the slots 82 and 84 protrude from the tip of the copper plate 66, and the teeth engage the bag and push it toward the presser foot 672f.
I am passing through 4j-. At the outermost position of the feed dog teeth shown in FIG.
Move it away from the needle plate 66 by a distance of 58 millimeters ("/16 inches) or more. In response to the rotation of the main part 11 shaft 32, the movement of the I-mouth movement shaft 32 becomes 784 degrees. It moves upwards along a generally circular path in a counterclockwise direction when viewed from the bottom of the machine. While the feeder moves along its path, it advances the bag through the machine in direction 80 and then Passively moved into direction 144 and into expansion 58.
After seven seconds, it moves upward in the direction 14fi to advance the moxibustion for the next suture.

Before the bag is put in, the earthen position 14υ (second
Figure) When there is a VC, the louver unit 54 is at position 148
, where the looper blade 88 is rested with its free end or tip 98 resting on a stone as seen in Figure 2.

Candy the sewing machine! II'1- In order to
2 (FIG. 1) depress the side button switch supported by K, and the cth moving wheel 24 begins to rotate the pulley 30 to transmit rotary motion to the main drive @32 via the belt 28. When the shaft 32 rotates into the force plane 31, it moves the various side parts of the sewing machine, including the needle drive assembly, and
f! 4I40′? : from position 140 (FIGS. 2 and 5) downwardly along a well-defined linear path 150 along the button shaft. When the main drive shaft 32 rotates, it is set aside. A looper cam 44 (Fig. The looper unit 54 is repeatedly swung through the same proboscis.The main drive shaft 32
Zero rotation also rotates the integral feed dog cam 56 to move it through the circular path of the feed block to advance the bag through the sewing machine 1υ.

In the following operation description, including the drawings (Figs. 2 to 16):
The movement of the glazed sewing machine components is described as upward, downward, leftward, and rightward. These terms are shown in the drawings.
' - used for component orientation. However, it should be understood that when sewing machine 10 is in commercial operation, it will likely operate in the orientation shown in FIG. Accordingly, in most of the drawings, the directional convention illustrated is to represent the direction seen by a person looking generally upwardly into the feed chamber 58 of FIG.

Referring now to FIG. 8, as the bag 152 moves in the downstream direction 80 to enter the sewing machine 10, the bag 152 moves toward the feed dog 18.
, the feed dog γ8 moves the bag in the direction 80 by the needle 40
The bundle advances a predetermined distance by passing through. Once the feed dog reaches the left position 154, it swings downward in direction 156, as shown in FIG. It passes through the hole 112 and carries the -order system 41 with it.

While the hand 40 is lowered from the raised starting position 140 (FIG. 2), the louver unit 54 swings to the left in direction 158 to the position shown in FIG. Looper is second
When moving from the starting position shown in the figure to the position of FIG. The upper end of the thread section 160 (best seen in FIG. 12) is held between the presser foot 72 and the peeling plate 660. Louver unit 541r'' 842 from 1 person to Figure 8 2Je i-Position V This left corner swinging pin, protection 4 notch 134 and louver eye 100
The short 115 minutes 160 of the secondary thread between is loosened slightly to allow it to be forced outwardly into the force of W'd as seen in Figures A8 and L12VC.

As shown in Fig. 8, the movement of this external force -\ causes the part 16υ of the needle to move a little away from the path 15CJy+ of the needle.
0 tip 164 or start passing through the zip section 160 'k 'J 1lls' PC-3. Bag of lead'1
After 52 seconds of movement downward, the feed dog t8 is removed from the bag and does not move.

Next, referring to FIG.
66. As the needle moves downward through the louver 1166 to the IM' 170, the louver unit 54 continues to work in this direction 158V around the axis of the looper cam 52. . When the looper blade 88 moves to the left as shown in Figure 2, the secondary thread 1υ2 is fed from the feed dog's 5μ minute 21tiY shell tunnel 120 and runs along the ninth hole (21orc and Cut the looper's eye Y through ℃. ν140 or sometime Cj
When the lower position is 'I'/tl &, the feeder 78 is the tooth IOt public 1. Temporarily 6u's soil l is placed in position 114 on the side of the leet, and mirror 79 is temporarily placed in bag 152.
, and in order to move it to the next button's class summons), move & to force 80 and move to the upper right force in direction 159 as you are about to enter the cage. The illustration also shows that the louver is in its position 168, displaced to the left, and would have swung to the right at 1140 in the middle.

During operation of sewing machine 10, secondary thread is delivered from tunnel 120 in feed section 216 to looper blade 88. As shown in FIG. 19, when the secondary thread 102 exits the tunnel 120 and passes around the blade 88, it becomes sharp and twisted.

This sharp bend causes the secondary thread to be squeezed in and leads it to the eye 10a of the louver. Keep it almost flat within 20 degrees. The rocking movement of the louver in the plane of positions 192 and 194, as well as the moving feed theory flock t6,
A pulling movement is applied to the secondary yarn 102 in order to overcome the resistance provided by the intermediate guide devices 43 and 116. This combination biases the thread 10 towards the wall of the front hole 210 of the thread -Lyg (10 pieces) with a guide that gives a resistance of 10 pieces, gently rises against the resistance, and rice 1υ2 is biased towards the wall of the front hole 210 of the louver eye 10 (31c). Blade 88 to help move towards the target
and the close cooperation between the Block 76 specific movement.
This is 1". Such cooperation means that the thread 102 is at -7 of the feed dog.
The primary interaction between thread 9 and bag 152 reduces the possibility of thread breakage and frictional wear as it is pulled through the sewing machine.

5 and 10, the louver unit has swung further to the right in direction 171 and is moving toward and past needle 40. As the tip 98 of the blade approaches the button, the needle moves upwardly, thereby spreading the -order loop 112 laterally and rearwardly from the needle, and the blade bends behind the needle, as seen in FIGS. 5 and 10. As the needle moves further to the right, the tip 98 of the louvered blade 88 easily enters the flared primary loop 172. As the looper unit 54 swings following the loop 112 of the primary yarn, the feed cannon 18 moves from position 114 to its rightmost position 116 and moves upwardly towards the stripping plate 66.

Next, referring to FIG. 11 and the twelfth factor, the louver unit 54 is shown to have swung to the right in the direction 111 to its first rightmost position.

During such movement, the tip 98 of the looper blade 88 moves completely through the primary loop 112 and inserts the secondary loop 112 through the secondary loop 112. Looper blade 88 is on the far right!
While moving '148-, the -next loop 172 is being pulled in the direction 80 through the 1r-henk 182.

- The loop 1γ2 of the secondary system is drawn into its position in the hook 182 by the movement of the wing feed αB7B which engages the bag 152 and moves it, to the tail of which the primary thread 41 is attached in the direction 80. Then the primary and secondary loops 172 and 1
While 66 is in the orientation shown in FIG.
72 is the thread part 160'YA184, and tRI is tightly tucked in, and part 1! When jO is pushed toward the joint 1tW of the splendor bar 138, the portion 1tiO
Holds 1-. The gap created between the looper blade 88 and the thread section 1600 due to the collective interaction of the louver eye 100 of the arm 96, the splendor bar 138, and the tensile effect J of the tightened primary loop 112 is shown in FIG. 14, there is excessive clearance for needle 40 to pass between secondary thread portion 160 and Ih 96 when the looper blade begins to swing to the left.

Regarding the angle shown in FIG. 12, the thread holding notch 134
is received in the cutout 134 of the secondary thread 102 and the loop 172'811 of the -order system, where the feed dog moves the bag in the direction 80, so that during the downward movement of the sword the loop 1γ2 of the primary thread is bc, keep it away from the path of the button 150, and when the sword 4o moves downward through the loop 166, the secondary thread 1
Make sure that 02 stays in the shape shown in Figure 12.

All the necessary secondary yarn 102 required by the looper blade 88 is obtained from the spool 18 by the movement of the looper - the yarn 102 is pulled out of the tunnel 120 in the front block through the sleeve guide 1. . By moving the looper blade 88 in a direction approximately converging with the line 120 (71) and by aligning the path of the looper blade approximately with the direction 80 of bag movement, the thread 102 is With minimal abrasive wear or breakage of the secondary threads, the louvers can be used to pull the threads out in a thin manner.The plane 2 (70
The movement of the louver along a path 107 such that K 71 intersects the direction of bag movement 8o at an angle not exceeding 45'-& is less likely to cause the secondary yarn to move 8o than a louver moving at right angles to the direction of bag flow K 71 . It doesn't cause a lot of damage and breakage. Furthermore, angle +14
When the 21J0 layer I' is good, it is improved.
A JR good result is obtained when the angle is between 10° and 20° (7i). Part of the outfit is also a part of the seams that are made, and the 51 lambda roughness 7.
(-Thus, the operation is improved.

Referring again to Figures 11 and 12, when the h-bar unit 54 is in position 180, the needle 40 is in the l'!+, ?SL upper position; -1, /'l-"-The bar unit 54 is located in this most stone sleeping hole, and the feed Dj+'/8!J
41 in the direction 80 in order to hold the bag 152 to 152, and to leak the bag by 2 beats apart, which is equal to the distance between the adjacent seams in the garment. I'm there.

13 and 14, during continuous operation, the 9t 40 moves downward toward the throat plate 66, while the feed dog 78 and the nail 40 move:! Before entering 152, the feed dog is moved downwardly and to the left in direction 186 to remove it from the mounting. The plan 140 passes downward through the bag tray 1 plate 6G and reaches the 16th
Continue down to position 196 in the 1st place 58 as shown in the ward. As the needle tip 164 approaches the looper arm 96, the looper unit swings to the left in direction 188, thereby moving the secondary thread section 160 k 12 to increase the clearance from the sword path 150. As can be seen in the figure and Figure 16, the needle 4° is the first
6 and 14, trace downward between portion 160 and looper arm 96 to encircle the needle in secondary loop 1bb.

Looper blade is in direction 188 at position 190 (#'!
When moving to Figure 13), the −th Luso 1/2 is /l/ −
14. Remove the braid 160 degrees towards the end 98 of the bar braid and loop the secondary yarn 166 as shown in FIG.
slide on.

As the looper unit 54 continues to swing to the left in direction 188, it begins to pull and tighten the secondary thread loop 166, as best shown in FIG.

At the same time as such narrowing, the downward commuting of the nail 40 in the direction 390 shortens the -order loop 1γ2 to shorten the secondary thread 1020
Pull the primary thread 41 through the second loop 172 to tighten it around and help create the seam. After making a joint as shown in Fig. 15, @14υ moves upward (while the looper unit 54 moves to the left position
8 and moves into and engages the loop 172 of the primary yarn as shown in FIGS. As the nail 40 continues to swing, the nail 40 falls into the lower heli (11), and is advanced into the loop 112 hook 182 of the next system.

When the button is turned off, the sender 78 will be attached to the bag and it will be ready for the next season! It has been relocated to the left for the platform. The test is sent*'i 78 and presser foot 72
When moved in direction 88 with the cooperation of
Y, bag i Pull it even more neatly towards k of 52.

The suturing process then continues as described for the Figures and repeats for the various stages described in Figures 16 through 15.

#t21 Alternative embodiment 2 of the looper blade shown in figure
30 is one implementation fi+ shown in FIGS. 1 to 20.
88 can be exchanged directly. The operation of both embodiments is exactly the same.

Although a preferred embodiment of the present invention has been described, it has failed.

Various modifications may be made thereto without departing from the spirit and scope of the above-mentioned claims. I want to be touched.

[Brief explanation of the drawing]

Figure 1 shows a sewing machine that embodies the present invention for sewing bags with two threads, with a part cut out and a part disassembled and arranged; 6 is a perspective bottom view of the needle plate used in the sewing machine of FIGS. 1 and 2; FIG. FIG. 4 shows the third
Figure 5 is an elevational view of the bottom of a part of the nail board in Figure 5, and Figure 5 is an enlarged bottom view showing the sewing machine in Figure 1 and the looper blade in Figure 1 while the bag is being sewn together. a Is/, I is the cutting plane 5a-5a in FIG.
Cross-sectional view of the looper blade and the crane in the direction of 6L
The figure is a cross-sectional view of a portion of plan 1 of the exit plan, taken in the direction of the cutting plane 6-6 of FIG. 2b3 is another cross-sectional view of a portion of the copper plate, and FIG. 8 is a perspective bottom view of the feeder of the sewing machine of FIG. 1, showing the sewing machine components in another operating stage; Figure 2 is a perspective bottom view of the feed chamber of the sewing machine shown in Figure 1.
Furthermore, the components of the sewing machine in one operating stage are shown.2 FIG. 10 is a perspective view of the feed chamber 91 of the sewing machine shown in FIG.
The figure shows one more stage of operation of the acid part of sewing machine 4V. Figure 11 is a transparent bottom view of the feed chamber and shows another stage of operation of the sewing machine components. Figure 12 is an enlarged paper 1 Japanese diagram of a certain component in Figure 11, showing the interaction of the looper blade, CA, thread and two-dimensional, and IIJj of the pull plate, and Figure 16 shows the body. The two operations of the sewing machine Suzaka 915 are shown in the section B of the sewing machine in Figure J1.
Figures 14 and 15 are enlarged bottom views of the components with the feed V and the upper part, and the interaction of the components during the merging of two successive L1-1s. 16 shows the plan 1 and the louver block shown in the direction of the cutting plane 16-16 of FIG. 5, and FIG. 17 shows the cutting plane of FIG. 16. 1 (1) of the louver block, looking in the direction of 17-17
11 and 18 are the cut 1171 plane 1s- of FIG. 17.
Fig. 19 is a cross-sectional view of the looper blade and feed dog block as seen from the ground, showing the position of the secondary yarn and the looper blade during operation. shows the course of extremes. Figure 19 shows the cut I of Figure 18.
6j Plane 19-1 as seen in the direction; FIG. 20 is a longitudinal sectional view taken through the island of the looper blade in the direction of the cutting plane 2[]-20 of FIG. 18; FIG. 1 is an alternative embodiment of a looper blade that may be used in the invention; The code 10 in the color range is "Sewing machine", 1fi is [-Secondary thread winding], 18 is ]-Secondary thread winding, N0 is "Housing", 22 is R nondle", 24 is [Electric motor ”, 25
．． 30&Xr Weisha”, 2b is “power cord”, 28 is “
"V belt", 32 is "pressure moving shaft", 34 is 1 degree drive 44
36 is [1 drive lever], 38 &I
r r needle J! ``Moving fence'', 4 (J & s l-yl'', 4
1 is the "-order system", 43, 45, 114, 116 are the "thread guide device", 44 is the "looper cam", 47 is the "ψ1 aim", 48 is the "cam follower", and 50 is the "follower's arm",
52 is "looper drive shaft", 53 is "looper A! II"
, #IJ@center 1ilII line", 54 is the "looper unit", 56 is the "Feeder cam", 58 is the "feed color amount", 66 is the 1 sword plate", 6b is the "presser foot shaft" , -1
, 70 ``spring'', 721-[presser foot], 74 ``feed dog assembly yo, 16 1 feed r) tooth block'', 78 ``feed spool'', 79 ``-feed dog yoke'' ”, 80 is “downstream direction”, 82.84 is 4/; large of l-fFi board, 86 is [
Looper block J, 87° 108 is "socket", a
s, 230 & “↓゛“looper blade”, 92 is “column d19Δ of the looper blade” is “central axial eclipse of the column”, 96
is "h of the looper", 98 is "tip of the looper blade", iau is "eye of the looper", 101 is "flat surface", 102 is "secondary thread", 107 is [path of the looper blade], 112 ``Button hole'', 121) ``-tunnel'', 134 ``Thread holding cut long J'', 13B ``Streak 1''
142 is "Entrance guide", 150 is "Needle course", 152 is "Installation", ib. is "part J of the secondary thread, 164 is the "tip of the thread," 166 is the "loop of the secondary thread," 1γ2 is f'-(loop of the K thread, 182 is the U funk, and 2υυ is the F plane." 210 is “
212 is the end of the arm of the 1 looper blade.
214B [lower edge of looper blade arm], A is "arc"
? Show J0Fig 7 Fig Ministry

Claims (1)

[Claims] (1) A two-thread bag-closing sewing machine for sewing and closing the bag when the bag moves downstream through the sewing machine. [a rigid housing comprising: a drive supported by said housing, a source of primary and secondary yarns adjacent to said housing for supplying primary and secondary yarns, respectively, movably mounted on said housing; a needle drive assembly operatively connected to said drive device and including a reciprocating needle residing in a needle path and movable in and out of said feed chambers, said needle including a sight; supports the loop of yarn,
Also adjacent to the needle and supported by the housing for holding down the bag, a presser foot assembly supported by the housing, operatively connected to the drive and facing the bag and for suturing the bag. a feed assembly including a movable, reciprocating feed dog adjacent to the feed dog, the feed dog cooperating with the presser foot assembly to advance the bag past the reciprocating needle in the downstream direction; a throat plate that communicates with the feed chambers and is placed along the path of the needle for receiving the needle during suturing, and also includes an improved looper assembly; the looper assembly has a central axis, is movably attached to the housing and acts on the drive to reciprocate the looper drive shaft through an arc about the central axis of the shaft; a louver unit comprising the looper drive shaft connected to the looper shaft, and a looper blade having an eye fixed to the looper shaft and supporting the loop of the secondary yarn; In response to rocking, the eye trajectory of the convex IIFi12 looper creates a stationary plane with respect to the needle path, so that the front blade is A two-thread type system characterized in that the loops of the second thread are pulled through the hook, and then the second thread of the second thread is inserted through the loops of the second thread. Sewing machine to close the bag. (2. The sewing machine according to claim 1, wherein the plane created by the arc is parallel to the path of the needle. (2) A sewing machine for closing a bag with two threads. 3) In the sewing machine according to claim 1, the needle plate further includes a thread holding notch communicating with the hole of the front 11C hook and extending downstream from the hole of the needle, and The notch holds the loop 'k t+iJ 1i12 of the secondary thread across the path of the needle during the downward movement of the needle, and during the downward movement of the needle the needle holds the secondary thread cooperating with the looper blade to receive and stretch the strand of the secondary yarn between the notch and the looper blade to confine the strand within the slit during movement through the loop; (4) In the sewing machine according to claim 3, the needle plate reliably creates an appropriate clearance for the needle to enter the secondary loop. a szo redder bar upstream of the needle for cooperating with the looper blade to roll the secondary loop by contacting the strand of secondary yarn and forcing it away from the path of the needle; (5) In the sewing machine according to claim 1, the looper blade is configured to engage with the loop of the next thread. A sewing machine for closing bags of two threads, characterized in that the hook is located downstream of the path of the needle when the needle passes through the louver unit during the descent of the needle. . (6) In the sewing machine according to claim 5,
The eye of the looper indicates that the needle is
In the sewing machine according to claim 1, the looper unit is placed upstream of the path of the needle when passing through the looper unit. , a looper block fixed thereto for rotation with the looper shaft, and the blade is supported by a rigid post T-8 held by the block, the blade cantilevered outwardly from the post. characterized in that the whole arm is extended in a straight line and has the eye of the looper at the free end of the elongated arm, and the pillar and the arm form the hook at the point of difference between the arm and the pillar. (8) In the sewing machine according to claim 7,
A two-thread bag characterized in that the post is substantially straight and has a central post axis, and the arm is substantially straight and thin, and the post axis and the thin arm lie substantially in the plane. close sewing machine. (9) A two-thread bag closing sewing machine according to claim 7, wherein the axes of the arm and the column intersect at a substantially right angle. α0) A two-thread bag closing sewing machine as claimed in claim 7, wherein said arm extends from said post a distance of at least four times the diameter of said needle. III) A two-thread bag-closing sewing machine according to claim 7, characterized in that said arm extends from said post a distance approximately four times the diameter of said needle. A sewing machine for closing a two-thread bag according to claim 7, wherein the axes of the arm and the column intersect at an angle between 80° and 1000°. (1 row) In the sewing machine according to claim 7,
The axes of the arm and the pillar intersect at an angle of approximately 85°, a sewing machine for closing a bag with two threads. I. The sewing machine of claim 7, wherein the arm has an end adjacent to the Ail column, and the arm:
The second thread is further characterized in that it further includes a thread slot extending from the eye to the end adjacent the nil marking post for receiving and guiding the secondary thread to the eye. Sewing machine to close the bag. ([5] The sewing machine according to claim 14, wherein the feed dog assembly includes a feed dog block having a portion extending forward of the louver node, and the portion has a tunnel passing through the portion. and the secondary yarn passes through the tunnel and extends rearwardly from the tunnel into the yarn slot of the looper and extends into and passes through the eye of the looper, in operation. , f) biasing the secondary thread extending between the groove and the thread slot towards the slot so that the secondary thread in the slot is substantially in the plane; A thread guiding device providing resistance to the secondary thread is placed on the housing between the secondary thread source and the feed dog block to hold the secondary thread during the bag advance. The reciprocating motion of the feed dog helps overcome the resistance;
A two-thread bag closing sewing machine, wherein said looper blade moves said tunnel about said guide device to assist in drawing secondary yarn from said secondary yarn source. (I6) a presser foot, a feed dog, having a secondary thread and a secondary thread; a moving looper unit, an angled hook on the blade spaced from the eye, and a needle eye through which a loop of thread is supported and moving along the needle path; 2 having a reciprocating needle passing through the presser plate;
Closing the second bag of thread by making two thread loops for stitching moving downstream through the sewing machine, and inserting the second thread loop under the throat plate. moving a needle and the secondary thread supported by the needle sight through the bag and the throat plate, and moving the elongated blade of the looper from a first position away from the path of the needle; lying almost entirely in one plane and oscillating in a first direction along an arc adjacent to the path of the needle to a second position, in which the grade loops the secondary yarn; make a fi
through the roots of the said-next thread supported by the fl note i Money and l! In order to advance the bag in the downstream direction for the next suturing, the bag is moved downstream by following the feed dog kIiJ needle.
When the feed +'N continues to move the bag downstream, thereby pulling the loop of secondary yarn tight around the secondary loop, the looper blade moves from the second position to the first position. In order to hold the secondary loop while swinging toward the units 1θ, the needle is passed through the bag and moved downwardly along the needle's path through the loop of the secondary thread, and the creating a loop of two threads to suture the bag, comprising the steps of moving a needle upwardly away from the bag and returning the looper blade to a first position; Method. (ID) a two-thread bag-closing sewing machine for sewing the bag closed as the bag moves downstream through the sewing machine, the sewing machine comprising: a rigid housing containing a delivery chamber; supported drives, respectively - primary and secondary yarn sources adjacent to said housing for supplying secondary yarns and secondary yarns, movably mounted to said housing and operatively connected to said drive; a needle drive assembly including a reciprocating needle movable in and out of said delivery chamber by means of a needle path, said needle including an eyelet through which said loop of thread is supported; , also, a presser foot assembly adjacent to the needle and supported by the housing for holding the bag, movably attached to the housing and operatively connected to the drive;
and a movable, reciprocating feed dog facing the bag and cooperating with the presser foot assembly to advance the bag in the downstream direction past the reciprocating needle during suturing of the bag. a needle plate adjacent to the feed dog and having a sword hole communicating with the delivery chamber and placed along the path of the needle for receiving the needle during suturing; and the drive. an improved looper assembly including a looper blade operatively connected to the device and having an eye extending throughout the loop of said secondary yarn, said looper blade IS positioning said blade closely adjacent the path of said needle; moving along the path of a blade completely on one side thereof to engage the loop of the secondary thread carried by the needle and forcing the loop of the secondary thread through the loop of the secondary thread during suturing; The dispensing chamber is movably mounted in the dispensing chamber for the purpose of dispensing with the dispensing chamber. A sewing machine that closes two-thread bags. 17. The sewing machine of claim 17, wherein the looper plate r includes a rigid post and an elongated arm cantilevering outwardly from the post, and at a free end of the arm. A sewing machine for closing two bags, characterized in that the eyes are adjacent to each other. 18. The two-legged bag-closing machine of claim 18, wherein said arm extends from said post a distance approximately equal to at least four times the diameter of said needle. l1l) A sewing machine according to claim 19, wherein the eye of the looper blade moves along the path of the blade, and the trajectory of the eye of the looper creates a stationary plane with respect to the path of the needle. A two-thread sewing machine that closes bags. qD When the bag moves in the downstream direction through the sewing machine, there is a double predecessor bag-closing sewing machine to sew the bag closed, and the first sewing machine has a solid) S housing, including a dispensing chamber; a drive supported by a housing, a source of primary and secondary yarns adjacent to said housing for supplying secondary and secondary yarns, respectively, movably mounted on said housing and acting on said drive; a hook drive assembly connected to and encircling a reciprocating needle capable of moving in and out of the feeding device by submerging in the path of the needle, the needle being supported through the loop of the secondary system; Including the guide,
also supported by the housing, operatively connected to the drive device, and facing the bag and for advancing the reciprocating needle in the flow direction n'+JF during suturing of the bag. a feed pair assembly including a movable, reciprocating feed dog cooperating with said presser foot overall assembly, and abutting said feed dog and communicating with said delivery chamber and during suturing +): for receiving delivery; a needle plate having a needle hole positioned in the path of the needle, an improved looper assembly including a looper drive shaft having a central axis; is movably attached to the housing and operatively connected to the drive for reciprocating the shaft through an arc about the central axis of the shaft, and is fixed to the looper shaft and the secondary yarn a looper unit including a looper blade having an eye supporting a loop of the looper blade, the looper blade being able to swing through the arc closely adjacent to the path of the needle in response to swinging of the looper axis; and the trajectory of the eye of the looper also prevents thread wear and breakage while hooking the secondary thread loop during suturing and inserting the secondary thread loop through the secondary thread loop. A sewing machine for closing double-breasted bags, characterized in that it has a flat surface that intersects the direction of movement of the bag at an angle not exceeding 45° so as to completely close the bag. (2) The sewing machine according to claim 21, characterized in that the angle does not exceed 20 degrees. (c) The sewing machine according to claim 22 In,
211 (predecessor bag-closing sewing machine), characterized in that said angle is between 100 and 20 degrees; said looper blade includes an arm having a free end;
The eye of the looper is placed adjacent to the free end, and the free end of the arm is configured to tighten the seams on which the bag is being made to better utilize the momentum of the bag.
A sewing machine for closing a bag of 2-1j thread, characterized in that, while the secondary thread lino-shi is being inserted through the loop of the primary thread, the bag swings in an upstream direction approximately opposite to the direction of force. .