JPS6357096A - Cord body cutter - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cutting device that automatically cuts strings such as threads and wires.

(Prior Art) For example, in a sewing machine, an upper thread bobbin is attached to the upper thread stand of the sewing machine, and the thread is pulled out from there and guided to the needle via a predetermined guide, tensioner, thread take-up, etc. (hereinafter referred to as (referred to as upper thread set). The thread type used in a series of sewing operations using this sewing machine is usually not constant, but the thread color is changed as needed.

Change the thread thickness, thread material, etc. each time (see below).

(This is called upper thread replacement).

Setting the upper thread is very troublesome, especially in sewing factories where the upper thread needs to be replaced frequently.If the upper thread is set according to the procedure every time the upper thread is replaced, work efficiency will decrease. Put it away. Therefore, when replacing the upper thread, the previously used thread (hereinafter referred to as the old upper thread) is cut off at the upper thread bobbin, and the thread from the new upper thread bobbin (hereinafter referred to as the new thread) is connected to it. Afterwards, I pull out the old upper thread at the needle, pull in the new thread, and replace the upper thread. This allows you to set the upper thread only at the beginning.

However, all operations such as cutting the old upper thread, tying the new thread to it, and setting the bobbin for the new thread must be performed by the operator. This is a task that is completely different in nature from a series of sewing operations, and is therefore painful for the operator, resulting in a new reduction in work efficiency.

Further, as long as the operator has to set the needle thread when replacing the needle thread, the sewing work cannot be completely automated.

Therefore, it may be possible to automate the process of cutting the old needle thread, tying the new thread to it, and setting the bobbin for the new thread.

(Problem to be solved by the invention) However, when ordinary scissors are used to cut the old needle thread, the end of the cut thread (thread end)
The cut thread end may be bent in an unexpected direction, or because the cut thread end is not held in place, the cut thread end may fall out of the designated thread guide, making it impossible to determine the cut thread end. If you only cut the yarn and do not apply any processing to the yarn end, that is fine, but for example, if you want to automatically connect the new yarn after cutting with the above-mentioned normal scissors, you may need to use a method other than the means to connect the yarn. , a means for arranging the cut end of the thread, a means for fixing the end of the thread, a means for grasping and extracting the end of the thread, and the like are required. In other words, since the cut end of the yarn is not in a constant state, various additional functions are required for the equipment that performs subsequent processing, resulting in an increase in the size of the equipment.

Further, when it is necessary to grasp each thread end, such as when pulling out and tying the thread ends of the old needle thread and the new thread, for example, an appropriate grasping means is required in addition to the scissors. Various types of gripping means are possible, but in the case of a gripping means that grips the thread by interlocking opposing surfaces, its operation is very similar to cutting the thread with scissors. In this case, it would be unreasonable to provide each of them separately, as this would lead to an increase in the size of the device.

The present invention provides an apparatus for automatically cutting and gripping a string such as a thread or wire by aligning the cut ends thereof.1 For example, by cutting a string and connecting another string to the cut end. An object of the present invention is to provide a string cutting device for use in an automatic string changing device.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the string cutting device of the present invention includes a first clamping member and a second clamping member each having an occlusal surface.
The pinching member is rotatably supported with a string supported by a string guide means and a string receiving means with their occlusal surfaces facing each other, and at least a first pinching member and a second pinching member. A cutting member extending in the radial direction of rotation is provided on either one of the occlusal surfaces, and when a cutting instruction is given,
At least one of the first pinching member and the second pinching member is driven to engage the occlusal surface.

(Function) According to this, when the occlusal surface of the first pinching member and the occlusal surface of the second pinching member interlock, the string is cut by the cutting member, but at the same time, the cord is cut by the respective occlusal surfaces. Since the end of the string is pinched, the end is trimmed and will not bend in an unexpected direction, and the cut end can be grasped and the string guiding means or To prevent the end of a string cut from a string receiving means from falling off. Furthermore, the end of the already cut string or the end of another string can be held and used for subsequent work such as connecting the string. In other words, only one device is required for cutting and gripping, and the device for automatically cutting and gripping the cord can be downsized.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Example) (1) Overview of machine configuration and mechanism operation FIG. 1 is a perspective view showing an automatic needle thread changing device of a sewing machine embodying the present invention. First, an overview will be explained with reference to FIG.

This device is roughly divided into a table unit 1 and a bobbin unit (2a, 2b, 2c, 2d).

Finger unit 3. Knock unit 4. and a sewing machine 5.

Four bobbin units 2a, 2b, 2c and 2d are mounted on the table 135 of the table unit 1.

These bobbin units are detachable, and in FIG. 1, the bobbin unit 2a is removed. This table 1
35 rotates and reciprocates toward the sewing machine 5.

The bobbin units 2a, 2b, 2c and 2d all have the same configuration, and have threads THa, Tl1b, respectively.
Bobbin BOBa wound with THc and THd,
BOBb, BOBc and BOBd are installed. However, the bobbins BOBa and BOBb of this example
, BOBc and Bond are wound with threads Tl (a, THb, THc and THd) of different types (color, material, thickness, etc.). 23a, 23b, 23c and 23d are thread guide members; Threads Tl1a, THb, Tl1 wound around each bobbin
c and Tl1d are movably guided in the first state and held firmly in the second state. Note that the thread guide members 23a, 2
3b, 23c and/or 23d are the second
is set in the state.

54 and is led from a balance 55 to a needle 56.

The thread guide member 51 of the sewing machine 5 has a thread (2a in FIG. 1) supplied from a bobbin unit (2a in FIG.
In FIG. 1, Tl1a) is movably guided in the first state and held firmly in the second state. Note that the sewing machine 5 is used for normal sewing.

The finger unit 3 includes a finger 33 that sets the first state or the second state of the thread guide member (23a) of the bobbin unit (2a) mounted on the sewing machine 5 and the thread guide member 51 on the sewing machine 5 side, and the sewing machine. A scissor 34 is provided to cut the thread (THa) supplied to the thread (THa), and moves horizontally as necessary to approach the thread (THa).

The thread guide member (for example, 2b) of the bobbin unit (for example, 2b)
A knock 44 (see FIG. 18) is provided to tie the thread (THb) held by the thread (Tlla, THb) held by the thread (Tlla, THb) by moving in the vertical direction as necessary.

Similarly, referring to FIG. 1, an overview of the mechanical operation of this automatic needle thread changing device will be explained.

First, the operator sets the state shown in FIG. 1. That is, the bobbin unit 2a is attached to the sewing machine 5, and the thread Tl1a is passed from the bobbin BOBa to the thread guide members 23a, 51 . First guide 52. Second guide 53° tensioner 54. It is set on a needle 56 via a balance 55. At this time, the thread guide members 23a and 51 are
The thread Tl1a is guided movably.

In this state, the operator, for example, thread Tl! When there is a thread change instruction to thread Tl1a, the finger unit 3 is
The thread guide members 23a and 51 are moved forward to the portion stretched by the thread guide members 23a and 51, and the fingers 33 first bring the thread guide members 23a and 51 into the second state. As a result, the thread T
l! a is held in that state. Subsequently, the thread THa of the tension section is cut by the scissors 34, and the finger unit 3 is retreated to its original position. The thread Tl1a is attached to the thread guide member 23
Since it is held firmly by a and 51, the nuki will not fall.

Next, the table 135 of the table unit 1 is rotated to open the storage notch 1, 351 for storing the bobbin unit 2a.
a to a position facing the bobbin unit 2a, and then the table 135 is driven toward the sewing machine 5. Due to this drive, the bobbin unit bases 21a of the bobbin units 1 to 2a attached to the sewing machine 5 are fitted into the storage notches 1351a, and then the table 135 is
, and collect the bobbin unit 2a on the table 135.

Since it is a thread change to thread rob, table 135 to 90
After rotating forward and positioning the bobbin unit 2b at a position facing the sewing machine 5, the table 135 is driven toward the sewing machine 5. By this drive, when the bobbin unit 2b is attached to the sewing machine 5 (the bobbin unit base 21b is attached to the attachment plug 5 of the bobbin unit attachment member 58 of the sewing machine 5)
81: The thread guide member 51 is fitted by the 34th thread guide member 51.
Grasp the end of the thread THa that is fixed to the thread THa and the end of the thread Tl1b that is fixed to the thread guide member 23b of the newly installed bobbin unit 2b.
After the thread guide members 23b and 51 are placed in the first state, the finger unit 3 is moved back to its original position.

As a result, thread Tt(a (sewing machine 5 side) and n+b
(Bobbin unit 2b side) is pulled out.

Finally, the knock unit 4 is raised to engage the pulled-out thread Tl1a (on the sewing machine 5 side) and Tl1b (on the bobbin unit 2b side) with the knock 44 (see FIG. 18), and the knock 44 is driven. Threads THa and Tl1b
, and lower the knock unit 4 to return it to its original position.

When the operator pulls the previously used extra yarn Ha from the needle 56, the new yarn Tl1b is guided to the needle 56 since the yarns THa and THb are connected. Therefore, there is no need for a troublesome upper thread setting operation when replacing the thread.

(2) Detailed structure and mechanical operation of each part will be explained in detail. 2 is a front view of the embodiment shown in FIG. 1, FIG. 3 is a plan view thereof, and FIG. 4 is a right side view thereof. In the following description, please also refer to these drawings.

■Table unit: Figs. 5, 6, and 7 are similar to Figs.
4 is an enlarged view of the main parts of FIG. 4. FIG. First, details of the table unit 1 will be explained with reference to these drawings.

The table unit 1 can be roughly divided into three parts: a fixed part 11, a moving part 12, and a rotating part 13.

The fixed portion 11 mainly includes a brace 111 fixed to the sewing machine table 6 and members fixed to the brace 111. The brace 111 has a piston rod fixing plate 113
A sensor bracket 114 with the sensor S1 attached thereto is fixed.

Further, a rail 112 is formed on the upper surface of the brace 111, and a slide base 123 is mounted thereon via slide bearings 121 and 122 so as to be able to reciprocate.

The slide base 123 has air cylinders CYI and CY2.
°Sensor S2, 53 and stepping motor 127
Equipped with etc. The sensor S2 is fixed to the slide base 123 by a sensor bracket 125, and the sensor S3
is attached to the sensor bracket 128, and the air cylinder C
It is fixed to the slide base 123 via Y2.

The stepping motor 127 is fixed to a motor bracket 126 fixed to a slide base, and an output gear 1271 is fixed to its output shaft.

The air cylinder CYI is fixed to a cylinder support plate 124 fixed to the slide base.
Since the piston rod PII is fixed to a piston rod fixing plate 113 fixed to the brace 111, the slide base 123 is reciprocated by the air cylinder C'/1.

That is, the moving part 12 mainly consists of a slide base 123 that reciprocates on the rail 112 and a member fixed to the slide base 123.

A fixed shaft 129 is further fixed to the slide base 123, a sleeve shaft 131 is attached thereto, and the head is fixed with an E-ring 1311. Sleeve shaft 1
31 is integrally formed with an input gear 132, to which a slit plate 133, a table 135, etc. are fixed, and is rotatably supported in the axial direction by a thrust bearing 134.

The input gear 132 is a gear pair with an output gear 1271 fixed to the output shaft of the stepping motor 127.

In other words, the rotating portion 13 mainly consists of a member fixed to the sleeve shaft.

A storage notch (not shown) for storing the bobbin unit 2b, a storage notch (not shown) for storing the bobbin unit 2c, and a storage notch (not shown) for storing the bobbin unit 2d are formed. The following is the storage notch 1351a and
Although the description is about the bobbin unit 2a, it should be understood that the other storage notches and bobbin units 2b, 2c, and 2d all have the same configuration.

The storage notch 1351a is a U-shaped notch.

Further small notch storage checks 1352a and 1353a are formed at symmetrical positions on the upper and lower sides thereof.

The bobbin unit 2a includes a bobbin unit base 21a,
The bobbin receiver consists of a shaft 22a, a bobbin BOBa, and a thread guide member 23a.

The bobbin unit base 21a has a lower plate 211a and an upper plate 2.
Since there is a first spacer 213a and a second spacer 12a, guide grooves that follow the storage notches 1351a are formed on three sides of the bobbin unit base 21a except for the left side. The first spacer f13a is equipped with a storage stopper pin 2131a that protrudes outward (downward in FIG. 6), and an outward force is applied to the storage stopper pin 2131a by a compression coil spring 2132a. . Although not shown, the second spacer 214a is provided with a storage stopper pin that also protrudes outward (upper side in FIG. 6) at a position symmetrical to the storage stopper pin 2131a, and is driven by a compression coil spring. It is given an outward force. When the bobbin unit 2a is attached to the storage notch 1351a, the storage stopper pin 21
31a is the storage check 1353a, and another one (not shown)
The two storage stopper pins engage the storage checks 1.352a, respectively, to fix the bobbin unit 2a.

The lower plate 211a, the upper plate 212a, the first spacer 213a, and the second spacer 214a form a socket inside. This socket is used to attach the bobbin unit 2a to the sewing machine 5.
(see illustration). On the other hand, the first spacer 213a has a mounting stopper pin 2133a that protrudes inwardly (upper side in FIG. 6).
The storage stopper pin 2133a is equipped with a
An inward force is applied by a compression coil spring 2134a. There is also one figure not shown.

The mounting stopper pin 213 of the second spacer 214a
At a position symmetrical to 3a, there is provided a bag-side stopper pin that also protrudes inward (downward in FIG. 6), and is given an inward force by a compression coil spring. Bobbin unit base 21a (7) When the mounting plug 581 is inserted into the socket, the mounting stopper pin 2133a is connected to the mounting check 582 by another plug (not shown).
A relative force is exerted by the two storage stopper pins against the thin 5 side (not shown) to prevent the bobbin unit 2a from wobbling.

Note that the spring (2134a) that acts on the mounting stopper pin (2133a) is the same as the storage stopper pin (2131).
The spring constant is larger than that of the spring (2132a) acting on a). In other words, the attachment point 1 - collar pin (2133a)
is stronger than the storage stopper pin (2131a).

Further, a collection hole 2111a, which will be described later, is bored in the lower plate 211a.

The shaft 22a of the bobbin receiver is fixed to the upper plate 212a of the bobbin unit base 21a. Referring to Figure 10,
A plastic skirt 221a with a flared hem is press-inserted therein. Bobbin BODa is this skirt 221a
Fixed by

Referring to FIG. 5, the thread guide member 23a is a pole 231a fixed to the bobbin unit base 21a.

It consists of a guide plate 232a fixed to the upper end of a pole 231a and a chuck 233a fixed to the guide plate 232a. The pole 231a includes a lower plate 211a, a second spacer 214a2332a, and a compression coil spring 2333.
a and 2334a.

Slide barrel 2335a, poles 2336a and 2337a.

It is composed of a retainer ring 2338a and a nut 2339a.

The slide barrel 2335a reciprocates on the guide shaft 2331a, opens the taper socket 2332a at the first position (the position in the first state) and movably guides the thread THa, and moves to the second position (the position in the second state). In the position in the state), the taper socket 2332a is closed to hold the photon Ha.

The guide shaft 2331a is shown in FIG. 9a, the taper socket 2332a is shown in FIG. 9b, and the slide barrel 2335a is shown in FIG. 9c.

Please refer to these drawings together.

Pulling fixing holes 23313a and 23314a (blank holes).

The circumferential receiver is groove 23312a, the first circumferential check groove 23
A second check groove 23315a with a circumference of 31Ga1, and a flange 23317a.

and a male screw 23318a are respectively formed.

Taper socket! -2332a has two claws of the same shape,
It consists of 2332+a and 23322a. The respective claws are pivotably engaged with the grooves 23312a of the guide shaft 2331a. During assembly, the compression coil spring 2333a is connected to the spring fixing hole 23313a and the claw 233.
A compression coil spring 2334a is fitted into the spring fixing hole 23314a and the spring receiver 23324a of the claw 23322a, respectively. In other words, the compression coil spring 233
3a and 23324a are cylinders that reciprocate the loaded soil. There is a tapered portion 23351a on the inner circumferential surface thereof, and when the guide shaft 2331a, tapered socket 2332a, and slide barrel 2335a are assembled, the tapered portion 23351a follows the outer circumferential surface of the tapered socket 2332a. A circumferential working pin receiver t7i123354a, which will be described later, is formed on the slide barrel 2335a.
Two ball receivers 23352a and 23353a are bored at symmetrical positions at the bottom of the groove 23354a. Ball receivers 23352a and 23353a are through holes with circular cross sections in the axial direction, into which balls 2336a and 2337a are fitted, respectively. Balls 2336a and 2337a have presser rings 233.
8a provides a force in the direction of the guide shaft 2331a, respectively.

When the slide barrel 2335a is in the first position.

Balls 2336a and 2337a are the guide shaft 2331
The balls 2336a and 233 are fitted into the first check groove 23316a of a to fix the slide barrel 2335a, and when the slide barrel 2335a is in the second position, the balls 2336a and 233
7a is the second check groove 23315 of the guide shaft 2331a
engage a. In the second position, the balls 2336a and 2337a pass through the female screw 23318a of the guide shaft 2331a, and a through hole with a smaller diameter than the flange 23317a is bored in the upright surface of the second guide plate 232a (see FIG. 5). , guide shaft 2331a
The female screw 23318a is inserted into the through hole and screwed together with the nut 2339a, and the flange 2331
7a and the nut 2339a sandwich the upright surface.

Furthermore, a thread guide 2321a made of resin is press-fitted into the horizontal surface of the guide plate 232a.

■Sewing Machine: Referring to FIGS. 5 and 8, a sewing machine side thread guide member 51 is fixed to the sewing machine bed 57. This thread guide member 51 has balls 511. A guide plate 512 (referred to as a guide and a guide plate 512 fixed to the upper end of the ball 511) is coaxially supported and opposed to the chuck (233a) of the thread guide member (23a).

The chuck 513 guides the thread (THa) from the attached bobbin unit (2a) or holds the needle thread left on the sewing machine 5, and has exactly the same configuration as the chuck 233a described above, and is provided with a guide shaft 5131. Taper socket 5
132. Compression coil springs 5133 and 5134
．． Slide barrel 5135. Balls 5136 and 51
37, presser ring 5138. and a nut 5139. The slide barrel 5135 reciprocates on the outer circumferential surface of the guide shaft 5131, opens the taper socket 5132 at the first position (the position in the first state) and movably guides the thread (THa), and moves to the second position. (The above '°
The female screw of the guide shaft 5131 (the ninth
(same as 23318a shown in figure a) passes through, and the flange (
A smaller diameter through hole (same as 23317a shown in FIG. 9a) is bored, and the female screw of the guide shaft 5131 is inserted through the through hole and screwed into the nut 5139, and the flange and nut 5139 are used to hold the upright Sandwich the sides.

Further, a thread guide 514 made of resin is press-fitted into the feeding and measuring vertical surface of the guide plate 512 (on the left side in FIG. 5).

■Recovery and installation of bobbin unit: Mainly with reference to FIGS. 5, 6 and 7.

The mechanical operation of the table unit 1 will be explained.

The table unit 1 is in the state shown by the solid line in FIGS. 5 and 6, that is, the slide base 123 is at the right end (
A state in which the storage notch 1351a of the table 135 is facing the direction of the sewing machine 5 is defined as a reference state. At this time, the cylinder support plate 124 is located directly above the sensor Sl, and the slit 1331 formed in the slit plate 133 is located between the sensors S2. The sensor S1 is a magnetic sensor, and the cylinder support plate 1 is in the standby position.
The sensor S2 is a photointerrupter and turns on when it detects the light transmitted through the slit 1331 in the reference state.

The rotational position of the table 135 from the reference state is determined by counting the number of steps of the stepping motor 127.

Assuming that the thread Tl1a between the chucks 233a and 513 has now been cut, please refer to FIGS. 5 and 6. 6 When recovering the bobbin unit l-2a attached to the sewing machine 5, first Storage notch 1351a that stores the bobbin unit 2a that is collected by rotating the table 135
Point it in the direction of sewing machine 5. When the storage notch (1351a) facing the sewing machine 5 is empty (no bobbin unit is stored), the magnetic sensor S3 is turned off.

Next, the air supply to the air cylinder CYI is switched to the forward movement side. CYI is a double-acting cylinder, and as will be described later, air is normally supplied to the double-acting side to press and fix the slide base 123 at the right end (standby position). With this air switching, the bobbin units 2b, 2c, and 2 mounted on the moving section 12, the rotating section 13, and the table 135 are
d moves toward the sewing machine 5 as one body. These have moved sufficiently to the sewing machine 5 side.

To ensure that the bobbin unit 2a is completely installed in the storage notch 1351a as shown by the two-dot chain line in FIGS. Lower plate 2
Insert it into the recovery hole 2111a provided in 11a. After this,
Switch the air supply and line of the air cylinder CVI to the reciprocating side.

As a result, the table 135 moves to the right with the bobbin unit 2a attached thereto, so that the bobbin unit 2a can be recovered from the sewing machine 5.

When the moving part 12 is in the standby position, the sensor S1 is turned on. For example, when installing the bobbin unit 2b, the stepping motor 127 is urged to rotate forward by a predetermined number of steps [N (90), which will be described later], and the table 135 is rotated 90 degrees clockwise.

When the bobbin unit l-2b faces the direction of the sewing machine 5, the air supply of the air cylinder CY1 is switched to the forward movement side, and the bobbin units 2a and 2b mounted on the moving section 12, the rotating section J section 13, and the table 135 are .

2c Move H2d toward the sewing machine 5 as one unit.

When these have sufficiently moved toward the sewing machine S side and become in a state corresponding to the two-dot chain line shown in FIGS. 5 and 6, and the bobbin unit 2b is attached to the attachment plug 581 of the sewing machine 5, the magnetic Sensor S4 is turned on.

In this state, the mounting stopper pin 2 of the bobbin unit 2b
133b and 2L43b are the attachment check of the attachment plug 581 (582 and the notch located in the symmetrical position)
engage with.

Therefore, the air supply of air cylinder CY1 was switched to the double-acting side.
Since the force is stronger (the spring is stronger) than the pin 2132a of the bobbin unit 2a in FIG. It is attached to the attachment plug 581 of No. 5.

■Finger unit: Figure 11 is a right side view of the main parts of finger unit 3 and its surroundings (based on Figure 2), Figure 12 is a right side view of the main parts of finger unit 3 and its surroundings (based on Figure 2)
The plan view of the figure and FIG. 13 are front views of the main parts of the finger unit 3. The finger unit 3 will be mainly explained with reference to these drawings.

The finger unit 3 mainly includes a fixed part 31 and a conveying part 32 . Finger 33. It is divided into scissors 34 and bush rods 35.

The fixing part 31 mainly consists of a support arm 311 fixed to the sewing machine table 6 and a member fixed to the support arm 311 (see FIG. 4).

A guide block 312 is fixed to the support arm 311, and the guide block 312 has two wooden slide pars 32.
3 and 324 are slidably mounted. The left ends of the slide pars 323 and 324 are supported by the support plate 321.
The right ends are connected to each other by a support plate 322.

A finger scissor bracket 327 is fixed to the support plate 321 via bushings 325 and 326. Further, since the piston rod PI3 of the air cylinder CY3 is fixed to the support plate 321, the reciprocating movement of the piston rod PI3 causes the sliders 323 and 324. Support plates 321 and 322. Also, the finger scissor bracket 237 reciprocates together.

In other words, the conveyance unit 32 has slide pars 323, 321 .
The support is a member in the shape of an R-shape (L-shape) with only one side shifted in parallel and connected at the corner (see the perspective view in FIG. 1). The left finger member 331 and the right finger member 332 are parts corresponding to the corners of an R-shape (L-shape), and are connected to the bracket by pivot shafts 333 and 334, respectively.
It is pivoted to 327.

One end of the left finger member 331 (the end of the double side of the character)
includes an upper working pin 3311 and a lower working pin 331.
2 are provided facing each other, and the other end has an upper side (Fig. 13 base narrowing).
A connecting bottle 3313 that emits odor is provided.

One end of the right finger member 332 (the end of the double side of the L-shape)
includes an upper working pin 3321 and a lower working pin 332.
2 are provided facing each other, and the other end is provided with the upper side (Fig.
A connecting pin 3323 is provided that protrudes from the P direction.

Each connecting bin 3313 and 3323 is engaged with a finger action plate 335. Finger action plate 33
A piston rod PI4 of an air cylinder CY4 mounted on a bracket 327 is fixed to the lower part of the cylinder 5 (inner side in FIG. 12). Therefore, when the piston PI4 is pushed out, the left finger member 331
When the one end of the right finger member 332 is expanded laterally and the piston PI4 is retracted, the one end is brought to the center.

An exploded perspective view of the scissors 34 is shown in FIG. 16.6 Referring to FIG.
Knife 342. Second block 343. Second knife 344
゜ and support means for rotatably supporting these.

The first block 341 has an occlusal surface 3411. First knife storage groove 3414. It has an elongated hole 3412 and a support hole although not shown in the drawing. The first knife 342 is installed in the first knife storage groove 3414. Also, the second block 3
43 has the same shape as the second block 341, and includes an occlusal surface 3431, a second knife storage groove 3434. Long hole 3432
and a support hole 3433. The second knife 34.1 is installed in the second knife storage groove 3414.

These are the assembly of the first block 341 and the first knife 342, and the assembly of the second block 343 and the second knife 3.
44 is rotatably supported with support pins 345 passing through the respective support holes. The support pin 345 is inserted into the support pin receiver 3461 of the support block 346 and enters the opposing storage grooves 3434 and 3414. In other words, the first knife 342 and the second knife 344 form a pair of scissors.

The long hole 3412 of the first block 341 and the long hole 3432 of the second block 343 are provided with the scissor action plate 3, respectively.
47 working pins 3472 and 3473 pass through. In the assembled state, an E-ring 3474 for preventing the scissor action plate 347 from shaking is attached to the tip of the action pin 3473.

A piston rod mounting hole 3471 is bored in the bent surface on the right side (lower side in FIG. 12) of the scissor action plate 347, and the piston rod PI5 of the air cylinder CY5 mounted on the bracket 327 is fixed therein. be done.

Therefore, when piston PI5 is pushed out, occlusion:
'344's cutting edge opens.

Referring again to FIGS. 11, 12, and 13, the bushing rod 35 is pivotally attached to the sensor scissor bracket 327 by a pin 351. As shown in FIG.

A portion of the sensor scissor bracket 327 is vertically bent there to form a rod receiver 3271 and a rod stopper 3272. Rod receiver 327
1 and the rod stopper 3272 are the bushing rod 3
Limit the rotation range of 5.

When the bushing rod 35 is in contact with the rod receiver 3271, the tip of the bushing rod 35 is connected to the chuck 513 and the thread guide 51 of the thread guide member 51 on the sewing machine 5 side.
4 (in Figures 11 and 12, the thread T
It is supported at a position opposite to l1a).

Next, the mechanical operation of the finger unit 3 will be explained with reference mainly to FIGS. 11, 12, 14, 15, and 16.

As shown in FIGS. 11 and 12, the air cylinder C
A state in which the piston rod PI3 of Y3 is fully retracted, the rod PI5 is retracted, and the scissors 34 are opened vertically is defined as a reference state. When the conveyance section 32 is in the standby position, the sensor S5 detects the support plate 321 and turns on.
Sensor S6 is turned off.

It is now assumed that the bobbin unit 2a is attached to the sewing machine 5, and thread THa is supplied to the sewing machine from the bobbin BOBa. Therefore, the thread guide member 51 of the sewing machine 5 and the thread guide member 23a of the bobbin unit 2a are both in the first state, that is, the slide barrel 5135 of the chuck 513 and the slide barrel 2335a of the chuck 233a are both in the first position.

The air cylinder CY3 is a double-acting cylinder, and normally air is supplied to the backward-acting side to press and fix the conveyor section 32 in the standby position, but when the air supply is turned to the forward-acting side and the air cylinder moves forward, , the tip of the bushing rod 35 is connected to the thread guide member 5
1, the thread Tl1a in the portion guided by the chuck 513 and the thread guide 514 comes into contact with the thread Tl1a in that portion as it moves forward. In this case, the thread Tl1a extending toward the sewing machine 5 side is thread guide 52, 53 . Since it is engaged with the tensioner 54 etc., the resistance is large, so the thread Tl1
a is fed out from the bobbin 130Ba.

In other words, the thread 711a set on the needle 56 will not come out due to this withdrawal. When the piston rod PI3 is pushed out sufficiently, each member mounted on the conveying section 32 and the finger scissor bracket 327 moves forward to the operating position shown by the two-dot chain line in FIGS. 11 and 12, and the magnetic sensor S6 detects the support plate 322 and turns on.

The upper working pin 3321 and the lower working pin 3322 of the right finger member 332 of the finger 33 are attached to the slide barrel 233 of the chuck 233a.
5a; and are guided by the chuck 513 and chuck 233a between the occlusal surface 3411 and the first knife 342 and the occlusal surface 3431 and the second knife 344 of the scissor 34. The thread Tl1a in the part where the thread is inserted enters.

Please refer to FIG. 14. Here, air is supplied to the reciprocating side to draw the piston rod P 4 of the air cylinder CY4, and the finger 33 moves the slide barrel 5135 of the chuck 513 and the chuck 233a as shown by the two-dot chain line in FIG. Slide barrel 2335a to the second
Drive into position. As a result, each system (a) is held firmly by the chuck 513 and the chuck 233a, respectively.

Next, air is forced into the air cylinder CY5 to push out the piston rod PI5, the occlusal surface 3411 and the first knife 342, the occlusal surface 3431 and the second knife 344 of the scissor 34 are closed, and the chuck 513 and the chuck 233 are closed.
a~ They are sandwiched and aligned by occlusal surfaces 3411 and 3431. After this, the air cylinder CY5 air is stopped, the piston rod PI5 is retracted, and the occlusal surface 3411 and the first knife 342 of the scissor 34 and the occlusal surface 3431
and second knife 344.

Thread T! When la is cut, the air cylinder C”/3 is connected again.
The near supply of the first
The state is shown by the solid line in Figure 4. At this time, the finger 33 remains centered, and the thread Tl1a is attached to the chuck 513.
It is held firmly by the chuck 233a, and the portion pulled out by the bushing rod 35 hangs down.

Here, as described above, the bobbin unit 2a is replaced. For example, if the bobbin unit 2b is replaced at this time, the bobbin unit 2b is replaced with the 14th bobbin unit 2b.
It is attached to the sewing machine 5 in exactly the same state as shown by the solid line in the figure (all the bobbin units attached to the table unit 1 hold the thread ends firmly in the second state).

Each member mounted on the gal scissor bracket 327 is moved forward again. This time, the thread guide member 51
Since the thread THa between the chuck 513 and the thread guide 514 is hanging down, the bushing rod 3
5 does not engage with the thread THa.

The operating position (magnetic sensor) shown by two points #'1 line in Fig. 15.

When S6 detects the support plate 322 and turns on), the upper working pin 3311 and the lower working pin 3312 of the left finger member 331 of the finger 33 move to the working pin receiver 5 of the slide barrel 5135 of the chuck 513.
1354; the upper working pin 3321 and the lower working pin 3322 of the right finger member 332 of the finger 33;
The working pin receivers 2.335/Ib of the slide barrel 2335b of the chuck 233b are engaged with the occlusal surface 3411 and the first knife 34 of the scissor 34, respectively.
2, the occlusal surfaces 3431 and 7, and the second knife 344, the end of the thread THa held by the chuck 513 (that is, the upper thread that was supplied before the bobbin unit was replaced), and the end of the thread THa held by the chuck 233b. Thread Tl1
The end of b enters.

Therefore, air is forced into the air cylinder CY5 to push out the piston rod PI5, and the occlusal surface 3411 (
integrated with the first knife 342), and the occlusal surface 3431 (second
344), grip the end of the thread THa and the end of the thread Tl1b, and then close the air cylinder C.
Air is supplied to the forward side of Y4 to push out the piston rod PI4, and the finger 33 drives the slide barrel 5135 of the chuck 513 and the slide barrel 2335b of the chuck 233b to the first position. This results in
The thread Ttla and the thread T)Ib each become movable.

The occlusal surface 37111 and the occlusal surface 3431 allow the thread T
Thread Tl1a and thread Tl1b are pulled out like l1a. At this time, since the thread Ti1a is given sufficient extra length by the bushing rod 35 in advance as described above, the thread THa will not come off from the needle 56 during this withdrawal.

The pulled out threads THa and Tl1b are connected by a knock 44 of the knock unit 4, which will be described below. At this time, the air supply from the air cylinder CY5 is stopped, the piston rod PI5 is retracted, and the occlusal surface 3411 of the scissor 34 is
and the first knife 342, the occlusal surface 3431 and the second
The knife 344 is opened again.

■Knock unit: Fig. 17 is a right side view of the main parts of knock unit 4 and its surroundings (based on Fig. 2), and Fig. 18 is a rear view of the main parts of knock unit 4 and its surroundings (Fig. 2). ). The knock unit 4 will be explained with reference to these drawings.

Broadly speaking, the knock unit 4 includes a fixed portion 41. Conveyance Q' 2゜柁+J m- Mainly fixed members. The support arm 411 includes
The guide block 412 is fixed, and the guide block 41
2 has air cylinder CY6 and sensor bracket 41
3 is fixed to the sensor bracket 413, and the sensor S7 is fixed to the sensor bracket 413.
and sensor s8 are fixed.

Sensors S7 and S8 are magnetic sensors.

The guide block 412 has two slide bars 422.
and 423 are slidably attached. The lower ends of the slide pars 422 and 423 are connected by a support plate 424, and the upper ends are connected by knotter brackets 1 to 421, respectively. Also, for the knock bracket 421.

Since the piston rod PI (i) of the air cylinder C'l'6 is fixed, the reciprocation of the piston rod PI6 causes the knock bracket 421, slide par 422,
In this embodiment, as the knock 44,
I am using Wiverse Snotter made by Todo Seisakusho.

This knock 44 is a thread (for example, Tl1a) on the sewing machine 5 side.
and the thread (Tllb) of the newly installed bobbin unit (for example, 2b) are connected with a grouper knot.

Figures 19, 20, 21a and 21b.

The knock 44 will be explained with reference to Figures 21c, 21d, 21e, 21f, 21g, and 21h. Figure 19 shows the cover on the near side (left side in Figure 17). FIG. 4 is a front external view of the knock 44 with the plate removed.

The knock 44 is a divider 441. )-Hemlock 442. 1st
Kurotsa 443. 2nd Kurotsa 444. Tying head 445. Stripper 446. Scissor 447. The main component is a base plate 448.

Hereinafter, the two threads shown in the drawings will be referred to as black thread (filled in) and white thread (outlined), respectively.

Distribute the ends of the two threads to be connected to both sides of the divider 441 and make J! Tying when placing
The second bushing groove 47I23 is the first and second bushing groove 47I23.
43,444, the crossing plates 4/131 and 4432 of the first crosser 443, and
The crossing plates 4441 and 4442 of the second clother 444 are each driven in the direction of the arrow to cross the two threads with the black thread facing down, and the trigger 44
2 Naifetsuji 4421 is the tying head 145
The head 44 acts on the spiral 4451 that continues to
5 starts rotating (Fig. 21b).

By rotating the trigger 442 smoothly, the tying head 445 is rotated by the action of the knife 4421 and the spiral 4451, and the tying head 445 is rotated as shown in FIGS. 21c and 21d.
The black thread and white thread are twisted as shown in Figure 21e.

The tip of the tying head 445 opens with one rotation.

The right end of the white thread is tied at a predetermined position.Then, with the tying head 445 almost upright, the pusher 4422 of the trigger 442 connects the stripper 442 with the right end of the white thread.
By acting on the glue lever 4461, the stripper 446
Flip it upwards (counterclockwise in Figure 19, in the direction of the arrow in Figure 20). As a result, the portions of the black thread and the white thread that were wound around the tying hem 445 are removed.

Since the tying head 445 grips the end of the white thread, the end of the white thread is just passed through the ring of black thread and white thread (Figure 21g). The stripper 446 is pushed up further to tension the knot.

In this way, the black thread and white thread are tied together, and the 21st h.
Combined as shown.

When the force to rotate the trigger 442 is released, the spring 4
49, the trigger 442 is rotated in the opposite direction, and each element is driven in the reverse order to return to its original state.

The rotary solenoid 43 rotates against the knock bracket 421 as described above. The leaf spring 4424 prevents backlash due to the mechanical play of the knock 44 and the rotary solenoid 43.

The mechanical operation of the knock unit 4 will be explained.

As shown by the solid line in FIG. 17, when the piston rod PI6 of the air cylinder CY6 is fully retracted, the conveyance section 42 is in the standby position, and the sensor S7 detects the knock bracket 421 and is turned on. .

As shown by the solid line in FIG. 35 mentioned above, with the scissors 34 of the finger unit 3 pulling out the end of the thread Tl1a on the sewing machine 5 side and the end of the thread THb of the newly installed bobbin unit 2b (Ill), Switch the air in the air cylinder C'/6 to the forward side and raise the knock bracket 121 and the knock 44 and rotary solenoid 43 mounted thereon together.

is m- This causes the divider 441 of the knock 44 to
When the thread Tl1a and the thread Tl1b are interposed and further raised to the operating position (sensor S8 is turned on), the thread THa and the thread Tl1b are placed on the knock 44 in the state described above. That is, the aforementioned black thread corresponds to the thread Tl1a, and the white thread corresponds to the thread Tl(b. At this time, the knock 44 flips up the bushing rod 35 of the finger unit 3.

When the rotary lenoid 43 is energized, the thread T
The end of l1a and the end of thread THb are tied with a grouper knot. When this connection is completed, air cylinder C'! '6's air is switched to the double-acting side, and the knock bracket 421 and the knock 44 mounted thereon. The rotary lenoid 43 is lowered together and returned to the standby position (sensor S phono).

(3) Drive mechanism In Fig. 22, Pmp is an air source, Con is a constant pressure adjustment unit, and Va Q 1. VaQ 2. VaQ
3. Va Q4. Va Q 5 and Va Q 6 are switching valves, So Q 1. So Q 2. SoQ
3゜So Q 41. So Q42. So Q 5 and 5oQ6 are solenoids, 5CII, 5C12,S
C2, 5C31, 5C32, 5C41, 5C42, SC
5, 5C61 and 5C62 are throttle valves. This figure shows the steady state, ie, the piston rod of each cylinder is retracted and each solenoid is deenergized. In addition, in the following explanation, the air source P
mp and the constant pressure 7A regulating unit Con are collectively referred to as an air source.

The air cylinder CYI that drives the slide base 123 of the table unit 1 is a double-acting cylinder.

In a steady state, the return side air supply port (the air supply port on the side where the piston rod is drawn in by air pressure feeding; the same applies hereinafter) communicates with the air source via the throttle valve 5C11 and the switching valve V; The supply port (same as the air supply RO2 on the side that pushes out the piston rod by air pressure) is the throttle valve 5C1
2 and the switching valve VaQl are connected to the air source via the switching valve VaQ 1, and the double-acting side air supply port is connected to the calibration valve 5C.
II and the switching valve Vaffl to the atmosphere. This pushes out the piston rod PII.

After that, when the solenoid 5oQ1 is deenergized, the switching valve VaQ1 returns to the state shown in the figure due to the reaction force of the spring ζr provided therein, and the return air supply port becomes the air source again.
Since the air supply ports on the forward side each communicate with the atmosphere, the piston rod PII is retracted and returns to a steady state after a predetermined period of time.

Provided on the slide base 123 of the table unit 1,
Air cylinder C'/2 for collecting the bobbin unit
is a single-acting cylinder with a spring, and in a steady state, the air supply port (forward motion) becomes the throttle valve SC2 and the air supply port communicates with the air source via the throttle valve SC2 and the switching valve Va fl 2. . This allows the piston rod PI
2 is pushed out against the spring provided in the cylinder CY2.

After this, when the solenoid 5oQ2 is deenergized, the switching valve VaQ2 returns to the state shown in the figure due to the reaction force of the spring provided therein, and the air supply port becomes connected to the atmosphere again, so that the switching valve VaQ2 provided in the cylinder C'/2 The piston rod PI2 is retracted by the reaction force of the spring, and returns to a steady state after a predetermined time.

The air cylinder CY3 that drives the conveyance section 32 of the finger unit 3 is a double-acting cylinder, and in a steady state, the double-acting side air supply port is connected to the throttle valve 5C31 and the switching valve Va.
It communicates with an air source via Q3, and the forward air supply port communicates with the atmosphere via a throttle valve 5C32 and a switching valve VaQ3.

When the solenoid So Q 3 is energized, the switching valve v
a123 has just been translated to the left in Fig. 22, and after the forward air supply port is connected to the throttle valve 5C32 and the solenoid So Q 3 is deenergized, the switching valve Van 3 is connected to the flange. Due to the reaction force of the spring, the state shown in the figure is restored, and the air supply port on the reciprocating side becomes the air source again.
Since the forward air supply ports each communicate with the atmosphere, the piston rod PI3 is retracted and returns to a steady state after a predetermined period of time.

The air cylinder CY4 that drives the fingers 33 of the finger unit 3 is a double-acting cylinder, and the switching valve ■aQ4 inserted in the air circuit of CY4 is a 3-position closed center valve. In a steady state, both the forward air supply port and the backward air supply port are closed.

Solenoid 5oQ41 is energized, solenoid So Q
42 is de-energized, the switching valve VaQ4 is just translated to the right in FIG. 22, and the reciprocating side air supply port communicates with the air source via the throttle valve 5C41 and the switching valve Vaρ4. The air supply port on the forward side is a throttle valve 5C42
゜The state shown in the figure is restored, and the forward air supply port and the backward air supply port are closed again. Therefore, the piston rod PI4 is positioned at that position.

Solenoid So Q41 is deenergized and solenoid So
When n42 is energized, the switching valve vaI24 is just translated to the left in FIG. 22, and the forward air supply port is connected to the throttle valve 5C42 and the switching valve VaQ4.
The air supply port on the reciprocating side is connected to the air source through the throttle valve 5.
It communicates with the atmosphere via C41 degree switching valve VaQ4. As a result, the piston rod PI4 is retracted. If the solenoid 5oQ42 is deenergized after a predetermined period of time has elapsed, the steady state shown in the figure will be achieved.

Air is used to drive the scissors 34 of the finger unit 3.

When the solenoid So Q5 is energized, the switching valve ■a02 is just moved in parallel to the left in Fig. 22, and the air supply port is connected to the throttle valve SC5 and the switching valve Va.
Connects to the air source via Q5. Due to this.

Piston rod PI5 is pushed out against the spring provided in cylinder CY5.

After that, when the solenoid So Q 5 is deenergized, the switching valve Vaf 15 returns to the state shown in the figure due to the reaction force of the spring provided therein, and the air supply port is again communicated with the atmosphere, so the spring provided in the cylinder CY 5 The piston rod PI5 is retracted by the reaction force, and returns to a steady state after a predetermined time.

The air cylinder CY6 that drives the conveyance section 42 of the knock unit 4 is a double-acting cylinder, and in a steady state, the double-acting side air supply port is connected to the throttle valve 5C61 and the switching valve VaQ.
6: v9.
Q6 has just been translated to the left in Figure 22 (41°), and the forward air supply port communicates with the air source via the throttle valve 5C62 and the switching valve VaΩ6, and the return air supply port is throttled. Valve 5C61 and switching valve Va Q 6
It communicates with the atmosphere through. As a result, the piston rod PI3 is pushed out.

After that, when the solenoid 5OQ3 is deenergized, the switching valve VaQ3 returns to the state shown in the figure due to the reaction force of the spring provided therein, and the backward air supply port becomes the air source again, and the forward air supply port Since both are connected to the atmosphere, the piston rod PI3 is retracted and returns to a steady state after a predetermined period of time.

The stepping motor 127 is connected to the table 1 through a gear train consisting of an output gear 1271 and an input gear 132.
35 in the normal direction (rotated clockwise in FIG. 3) or reversely rotates the table 135 (rotated counterclockwise in FIG. 3).

The rotary solenoid 43 engages with the trigger 442 of the knock 44 via a leaf spring 4424, and when energized, rotates the trigger 442 clockwise in FIG. 19, and deenergizes it. be. This electrical system is centered around a microprocessor CPU.

The microprocessor CPU is a terminal of the host processor MPU, in which each sensor SL, S2, 33 .
S4. S5゜56, S7 and sg, stepping motor driver Drl that executes forward/reverse energization/deenergization of the stepping motor 127 according to CPU instructions, and each solenoid 5oQ1, So 122. So Q 3
．． So Q41. So Q42. Solenoid driver blade 2° that activates/deenergizes SoQ 5 and 5onG, and lamps LPI and LP according to CPU instructions.
A lamp driver Dr3 that executes lighting/extinguishing of the lamp 2 is connected.

The lamps LPI and LP2 connect each thread end provided on the sewing machine bed 57 to each chuck 233a, 233b, 23.
3c and 233d, respectively (ie, in the second state), and stored in the table 135 of the table unit 1. One of these days, take out the bobbin unit containing the thread (upper thread) that you are about to use, attach it to the sewing machine 5, and loosen its chuck (that is, there is no need to attach this bobbin unit to the table 135 from the beginning).

(There is no need to fix the thread end), let out the thread, and turn it on to the sewing machine 5.
thread guide member 51 and thread guide 52 of the sewing machine body.
．． 53 through the tensioner 54. Guide the balance 55 and attach it to the needle 56 (as will become clear in the following explanation,
This attachment of the upper thread to the sewing machine 5 is only the first time and is unnecessary thereafter).

When the operator finishes sewing using this thread and replaces it with another thread, the operator selects the number corresponding to that thread from the operation board (not shown), that is, the tape microprocessor C.
The PU operates the sensors Sl, S2 . S3. S4. S5. S6. S7 and S8
While monitoring, the stepping driver Drl is instructed to energize/deenergize the stepping motor 127 in forward and reverse directions, and the solenoid driver Dr2 is activated so that the solenoid 5oQ1°SoQ
2. So Q 3. So Q41. So Q42
．． The upper thread exchange control of the sewing machine 5 is performed by selectively instructing the energization/deenergization of SoQ5 and 5oQ6.

If an error occurs while performing upper thread exchange control, the microprocessor CPU causes the lamp driver Dr3 to output the lamp LPI or lamp LP2 corresponding to the error.
It instructs the host processor MPU to turn on the light and notifies the host processor MPU of this fact.

The flowchart shown in FIG. 24 is the main routine of needle thread exchange control performed by the microprocessor CPU.

In general, the CPU sets the initial state when the power is turned on, waits for a thread replacement instruction from the host processor MPU, and attaches the thread exchange unit of the host processor MPtl to the sewing machine 5. The above items 1 to 2 will be explained in detail.

■Initial state settings: When the power is turned on, the internal memory, registers, and output ports are initialized, and the drivers Dry, Dr2, and Dry
Reset 3.

The table 135 of the table unit 1 is at the home position (the position where the storage notch 1351a faces the sewing machine 5:
In other words, if the sensor s2 is not in the ON position), while monitoring the sensor S2, the driver leaf 1 is activated to rotate the stepping motor 127 one step forward (the table 135 rotates in the normal direction) until the sensor s2 is turned on. direction).

When the table 135 is set to the home position, the value of register C is set to 1, and the host processor MP
This becomes a loop waiting for U thread replacement instruction.

C=2 indicates the position where the storage notch that accommodates the bobbin unit 2b faces the sewing machine 5, C=3 indicates the position where the storage notch that accommodates the bobbin unit 2c faces the sewing machine 5, and C= 4 indicates a position where a storage notch for storing the bobbin unit 2d faces the sewing machine 5.

■Recovery of bobbin unit: When thread replacement is instructed by host processor MPU, the value indicating the specified bobbin unit is memorized in register B, and
Set Busy.

B register indicates bobbin unit 2a with B=1, and B
=2 indicates the bobbin unit 2b, B=3 indicates the bobbin unit 2C, and B=4 indicates that the bobbin unit 5 unit base is detected and turned on.

The sensor S3 is located in the storage notch facing the sewing machine 5.
Detects whether the bobbin unit is stored or not.

Therefore, if sensor S3 is on, the table is rotated to search for an empty storage notch.

As will become clear from the explanation below, normally, after the designated bobbin unit is installed on the sewing machine 5, the rotational position of the table 135 of the table unit 1 is not changed, so the storage notch for storing the installed bobbin unit is not changed. is facing the sewing machine 5, and sensor S3 is off. For example, when the operator sets the upper thread for the first time, he selects and installs the bobbin unit at an arbitrary position, so in this case It is possible that sensor S3 is turned on.

In searching for a storage notch for collecting the installed bobbin unit, first, the value of the C register is saved to the D register.

Since the C register stores the number indicating the storage notch facing the sewing machine 5 as described above, the search start position is stored here.

Next, execute the 90° forward rotation subroutine and
Rotate 5 90 degrees forward (clockwise in Figure 3). The 90'' normal rotation subroutine is shown in FIG. 25. Referring to FIG. 25, the microprocessor CPU controls the stepping motor 1.
The table 135 is positioned for normal rotation by 90 degrees by counting the number of steps in which the table 135 is urged to rotate in the normal direction. Sometimes, positioning is performed while monitoring the sensor S2 to prevent cumulative errors due to step-out of the stepping motor or the like.

Therefore, two types of control are executed depending on the value of the C register. In other words, as described above, each storage notch is formed at a position that divides the circumference of the disc-shaped table 135 into four, so if the value of the C register is 4, the 90 Normal rotation causes the storage notch (1351a) corresponding to C=1 to face the sewing machine 5.

Therefore, while monitoring the sensor S2, the driver blade 1 is sequentially instructed to energize the stepping motor 127 in one step forward rotation, and when the sensor S2 is turned on, the value of the C register is set to 1 and the process returns to the main routine.

If the value of the C register is not 4, after clearing the N register that counts the number of steps, the N register is incremented by 1 each time the driver Drl is instructed to energize the stepping motor 127 in the normal rotation by 1 step. The process is repeated until the value N (90) of the steps required for the motor 127 to rotate 90' in the table 135 in the normal direction (this number of steps is, of course, the same for the 90° reverse rotation described later). When the value of the N register becomes N (90),
Increment the value of the C register by 1 and return to the main routine.

Please refer again to the main routine in FIG.

When the 90° normal rotation subroutine is executed, the sensor S3 checks whether the new storage notch facing the sewing machine 5 is empty. If it is not empty, the table 135 is rotated 90° in the normal direction again.

. The operator accidentally did not put the bobbin unit into sewing machine 5. Therefore, when the value of the C register and the value of the C register match, error 1 is set and the driver Dr3 is instructed to turn on the lamp LPI, and the host 1-processor MPU is notified that error 1 has occurred. , Bu
sy is reset and a loop waits for instructions from the host processor MPU.

In either case, if the storage notch for collecting and storing the installed bobbin unit is facing the sewing machine 5, or if the storage notch is located facing the sewing machine 5 after searching, then the value of the C register is and the value of the B register. The value of the C register indicates the storage notch,
The value of the B register is the bobbin unit that will be installed on the sewing machine 5 after collecting the bobbin unit that is currently installed on the sewing machine 5 (that is, the currently installed unit) (that is, the specified bobbin unit),
The thread replacement instruction from the host processor MPU at this time is canceled.

If the value in the C register and the value in the B register are not the same,
A collection subroutine is executed to retrieve the bobbin unit currently installed in the sewing machine 5 (that is, the currently installed unit). The collection subroutine is shown in FIG. This will be explained with reference to FIG.

In recovery, first, solenoid S is connected to driver Dr2.
o Instruct to energize the switching valve VaQ3
Switch the boat and push out the piston rod PI3 of the air cylinder CY3. This extrusion causes the conveyance section 32 of the finger unit 3 and the fingers 33 mounted thereon. The scissors 34 etc. move forward as one.

At this time, as described above, the sewing machine side thread guide member 51
(This is the thread guide center valve that is fixed to the sewing machine 5, and when the solenoids 5oQ41 and SoQ42 are de-energized, it closes the air supply ports on the forward and backward sides of the air cylinder CY4. , air cylinder C”/
4 is maintained in its previous state of use. Therefore, as will become clear from the following description, the current state is that the bobbin unit is attached to the sewing machine 5 and the upper thread is being supplied to the sewing machine 5 from the bobbin of the bobbin unit.

At this time, air cylinder CY4 is piston rod PI4
is maintained in an extruded state, i.e.

The fingers 33 are opened left and right. therefore.

When the piston rod PI3 of the air cylinder CY3 is pushed out sufficiently, the finger 33 moves between the slide barrel 5135 of the chuck 513 of the sewing machine side thread guide member 51 and the attached bobbin unit side thread guide member (the bobbin unit attached to the sewing machine 5). The thread guide section So detects the support plate 322 and turns on.

When the sensor S6 is turned on, it instructs the driver Dr2 to energize the solenoid SOα41. As a result, the piston rod 4 of the cylinder CY4 is retracted, so
The fingers 33 are driven toward the center, and the slide barrels of the respective chucks (5135 and the slide barrel of the mounting bobbin unit; 1' in FIG. 12) are moved.

2335a) to the second position. Thereby, each chuck holds the thread being supplied to the sewing machine 5 in place.

Also, at this time, solenoid SoQ is connected to driver Dr2.
5 and pushes out the piston rod PI5 of the air cylinder CY5. As a result, the scissors 34 are closed, and the thread in the portion supported by the chuck 513 of the sewing machine side thread guide member 51 and the chuck of the attached bobbin unit side thread guide member is cut. As mentioned above, the scissors 34 trim the ends of the yarn during this cutting.

Air purge the fingers 33 and scissors 34, respectively.

After one hour has elapsed, the driver Dr2 is instructed to de-energize solenoid So Q5 and solenoid So Q3.
, de-energizes solenoid 5oQ41, and energizes solenoid 5oQ1, and clears and starts the internal timer.

When the solenoid So Q5 is deenergized, the piston rod PI5 of the air cylinder CY5 is retracted by the spring reaction force and opens the scissor 34 again.

When solenoid 5oQ3 is deenergized, switching valve Va
Q3 returns to its original state due to the spring reaction force, switches the port, and pulls in the piston rod PI3 of the air cylinder CY3. In other words, finger unit 3 cylinder CY4
Close the air supply ports on the forward and backward sides. Therefore, the air cylinder CY4 is fixed, and the fingers 33 are maintained in a central position, that is, in the position when each slide barrel is driven to the second position.

When solenoid 5oQ1 is energized, switching valve Va
Q1 is driven, and air is force-fed to the forward air supply port of the air cylinder CYI. As a result, the piston rod PII is pushed out (in this case, the piston rod PII is fixed, but it should be considered that the piston rod PII is pushed out relatively), and is housed in the moving part 12 of the table unit 1 and the table 135. The bobbin unit is integrated,
The sewing machine starts moving forward in the 5th direction. In the timer, the moving part 12 of the table unit 1 moves forward, gives an instruction to energize the bobbin unit base of the attached bobbin unit and the bobbin unit 5oQ2 of the table 135, and closes the switching valve Va.
Q2 is switched, the piston rod PI2 is pushed out, and the rod PI2 enters the collection hole of the bobbin unit base of the installed bobbin unit (2111a in Fig. 6 or the corresponding hole of another bobbin unit). Waiting for a sufficient period of time (in this embodiment, this time is set to 13), the driver Dr2 is connected to the solenoid 5oQ1. Give instructions to turn off the power.

When solenoid 5oQ1 is deenergized, 2 switching valve Va1
21 returns to its original state due to the spring reaction force, switches the port, and connects the piston rod PII of air cylinder CY1 to (
relatively), which causes table unit 1
The moving part 12 and the bobbin unit housed in the table 135 integrally start moving backward in the direction of the sewing machine 5, but at this time, the two piston rods 2 of the air cylinder C'/2 move against the bobbin unit of the attached bobbin unit. Since it has entered the collection hole of the base, it is peeled off against the bonding force between the bobbin unit base and the mounting plug 581 of the sewing machine 5, and retreats together with the table 135.

A de-energization instruction is given, recovery of the bobbin unit (attached to the sewing machine 5) is completed, and the process returns to the main routine of FIG. 24.

■Attachment of designated bobbin unit following collection of bobbin unit: Currently, the bobbin unit that was previously installed in sewing machine 5 (hereinafter referred to as the old bobbin unit) has been collected in table unit 1, and the bobbin unit is It faces sewing machine 5. So, I returned to the main routine and continued.

The specified No. and set subroutine is executed, and the specified bobbin unit (correctly, a storage notch for storing the specified bobbin unit: described later) is made to face the sewing machine 5. Designation No.
, the set subroutine is shown in Figure 26 when the fixed bobbin unit is 2d, when the old bobbin unit is 2b and the designated bobbin unit is 2a, when the old bobbin unit is 2c and the designated bobbin unit is 2b, or when the old bobbin unit is 2b. When the designated bobbin unit is 20 in 2d, it is more rational to reverse the table 135. In other words, the old bobbin unit at this time is indicated by the value of the C register, so from the value of the C register, B
Subtract the value of the register, and if the value is 1 or -3, then 9
Execute the 0° reversal subroutine and change the table 135 to 9
0 @ reverse. The 901 reversal subroutine is shown in FIG. 27 and will be described with reference to FIG.

The microprocessor CPU is a stepping motor 12
The table 135 is positioned 90'' in the reverse direction by counting the number of steps for reversely energizing the notch 1351a. By positioning while monitoring S2, cumulative errors due to step-out of the stepping motor, etc. are prevented.Therefore, two types of control are selectively executed.

That is, when the old bobbin unit is 2b and the designated bobbin unit is 2a, the value of the C register is 2, so while monitoring the sensor S2, the driver Drl is sequentially instructed to reverse energize the stepping motor 127 by one step, When sensor S2 turns on, the value of the C register is decremented by 1 and the process returns to the main routine.

If the value of the C register is not 2, after clearing the N register that counts the number of steps, the N register is counted down by 1 every time the driver Drl is instructed to reversely energize the stepping motor 12 by one step, and the N register is Repeat until the value reaches N (90), the number of steps of the motor 127 required for a 90° reverse rotation in the table 135 (this number of steps is the same as the 90° forward rotation described above), and the value of the N register becomes N (90). Then, the value of the C register is decremented by 1 and the process returns to the main routine.

However, if this 90° reversal subroutine is executed when the old bobbin unit is 2a (C=1), the designated bobbin unit 2d will face the sewing machine 5, but by decrementing the value of the C register by 1, the C Since the value of the register becomes -1, in that case, the value of the C register is set to 4 and then the process returns to the main routine.

In the designation number and set subroutine shown in FIG. 26, the value obtained by subtracting the value of the B register from the value of the C register is 3.
．． 2. If it is -1 or -2, the designated bobbin unit is at a position of 90" in the reverse direction or at a position of 180 degrees with respect to the old bobbin unit, so it is 90" until the value of the C register matches the value of the B register. Execute the forward rotation subroutine.

In other words, when the designated bobbin unit is located 180 m from the old bobbin unit (i.e., C-B=2 or -2), 90 m in FIG.
@Execute the forward rotation subroutine twice.

The table 135 is rotated 180 degrees forward.

When the designated No., set subroutine is executed and the main routine is returned, the sensor S3 is checked.

The operator has correctly installed table unit 1 as described above.
If the bobbin unit is set in
However, if the bobbin unit is incorrectly set, the sensor S3 may not turn on at this time.

In other words, if sensor S3 is not turned on, execute the specified No. set subroutine and set error 2 because the bobbin unit (designated bobbin unit) is not stored in the storage notch facing the sewing machine 5. The driver Dr3 is instructed to turn on the lamp LP2, and the host unit (that is, the old bobbin unit) has been collected, that is, the sewing machine 5 is not equipped with a bobbin unit.

At this time, if sensor S3 is on, it is designated No.

By executing the set subroutine, the designated bobbin unit is placed opposite the sewing machine 5, so the mounting subroutine is then executed to mount the designated bobbin unit on the sewing machine 5. The mounting subroutine is shown in FIG. 29 and will be described with reference to FIG.

When installing, first attach solenoid 5 to driver Or2.
oul is activated, the port of the switching valve Vaμm is switched, and the piston rod PI of the air cylinder CYI is activated.
Push out I (because PII is fixed, push it out relatively). This allows the table unit (for example 21b
), when the attachment plug 581 of the sewing machine 5 is properly connected, the sensor S4 detects the bobbin unit base and turns on, instructing the driver Dr2 to de-energize the solenoid 5oQ1 and energize the solenoid SoQ3. give.

When solenoid 5oul is deenergized, switching valve VaQ
l returns to its original state due to the spring reaction force, switches the port, and (relatively) draws in the piston rod PII of the air cylinder CYI. As a result, the movable section 12 of the table unit 1 and the bobbin unit housed in the table 135 begin to move backward toward the sewing machine 5 together.

At this time, as mentioned above, the bobbin unit base,
Since the coupling force to the mounting plug 581 is greater than the coupling force to the storage notch (the spring of the stopper bin is strong), the designated bobbin unit is peeled off from the storage notch against the coupling force, and the mounting plug solenoid S of the sewing machine 5 is removed.
When oQ3 is energized, the switching valve Van3 is driven to switch the port, and the piston rod PI3 of the air cylinder CY3 is pushed out.

This extrusion causes the conveyance section 32 of the finger unit 3 and the fingers 33 mounted thereon. The scissors 34 etc. move forward as one. In this case, the upper thread (hereinafter referred to as set upper thread) that was supplied from the old bobbin unit extending from the sewing machine side thread guide member 51 toward the sewing machine main body
is loosened by the action of the bushing rod 35 mentioned above, so the bushing rod 35 does not engage with the upper thread.

Since the air cylinder CY4 is maintained in a state in which the air supply port is closed and the piston rod PI4 is retracted, the finger 33 is in a central position, that is, the sewing machine side thread guide member 51 and the thread guide member of the old bobbin unit. The slide barrels of the respective chucks are maintained in the posture when they are driven to the second position (the state after execution of the collection subroutine).

Therefore, when the piston rod P 3 of the air cylinder Cv3 is pushed out sufficiently, the finger 33 is moved to the slide barrel 5 of the chuck 513 of the sewing machine side thread guide member 51.
135 and the slide barrel of the chuck of the new bobbin unit side thread guide member (thread guide member of the bobbin unit newly installed in the sewing machine 5: 23b in FIG. 15).
In FIG. 15, the chuck 2335b) of 233b is engaged (as described above, the chuck of the new bobbin unit is in the second state).

In this state, the ends of the thread held by these chucks between the scissors 24 (thread end of the assembly thread and thread end of the new wheel thread: the thread end of the thread being paid out from the bobbin of the new bobbin unit) ) respectively enter, and furthermore, the sensor S
6 detects the support plate 322 and turns on.

When sensor S6 is turned on, it instructs driver Dr2 to energize solenoid 5oQ5 and solenoid 5oQ42.

When solenoid 5oQ5 is energized, switching valve Va
Q5 is driven and the port is switched, air or
When solenoid 5oQ42 is energized, switching valve Va
Q4 is driven and the port is switched, and the forward side air supply port of air cylinder CY4, which had been closed until then, is used as the air source and the backward side air supply port is communicated with the atmosphere, so piston rod PI4 is opened. being pushed out. By this extrusion, the fingers 33 are driven and spread laterally, driving the slide barrels of the respective chucks (5135 and the slide barrel of the new bobbin unit) to the first position.

Thereby, each chuck supports the upper yarn and the new yarn in a movable manner.

In driving the cylinders CY5 and C''/4, an internal timer sets a delay step corresponding to the time lag (in this embodiment, this is 4) until each cylinder completes its operation. When time elapses, solenoid So Q 4 is activated in driver Dr2.
2 deenergization instruction and solenoid So Q 3 is closed. Therefore, the air cylinder CY4 is fixed, and the fingers 33 are maintained in the left and right open position, that is, in the position when each slide barrel is driven to the first position. The posture of the finger 33 at this time is the posture when starting execution of the above-described collection subroutine.

When solenoid So Q 3 is deenergized, switching valve V
a Q3 returns to its original state due to the spring reaction force, switches the port, and connects the piston rod PI of air cylinder CY3.
3, that is, the transport section 3 of the finger unit 3
2 retreat begins. At this time, the scissors 34 move backward while holding the ends of the top yarn and the new yarn, so that the top yarn and the new yarn are pulled out.

The conveying section 32 of the finger unit 3 is sufficiently retreated, and Va
Q6 is driven, the port is switched, and piston rod PI5 of air cylinder CY6 is pushed out.

This extrusion causes the transport section 42 of the knock unit 4 and the knock 44 mounted thereon. The rotary solenoid 43 starts to rise together, and the divider 441 of the knock 44 intervenes between the opening yarn pulled out by the finger unit 3 and the new yarn.

When the transport section 32 of the knock unit 4 and the members mounted thereon rise sufficiently together and the sensor S8 detects the support plate 424 and turns on, a predetermined portion of the knock 44 (i.e., both sides of the divider 424) Since the upper thread and the new thread are set, an instruction to de-energize the solenoid So Q 5 and to energize the rotary solenoid 43 is given to the driver leaf 2.

When solenoid 5oQ5 is deenergized, air cylinder CY
The piston rod PI5 of No. 5 is pulled in by the spring reaction force and reopens the scissors 34.

At this time, the rotary solenoid 43 is energized and gives an instruction to the driver Dr2 to de-energize the rotary solenoid 43 and the solenoid 5oQ6.

When the rotary solenoid 43 is deenergized, the trigger 442 of the knock 44 and the rotary solenoid 43 are returned to their original states by the reaction force of the spring 449 engaged with the trigger 442.

When solenoid So Q 6 is deenergized, switching valve V
aQ6ffi Returns to the original state due to spring reaction force, switches the port, and connects the piston rod PI of air cylinder CY6.
Pull in 6. With this retraction, the transport section 42 of the knock unit 4 and the footer 44 mounted thereon.
When the rotary solenoid 43 is lowered together and the sensor S7 detects the knock bracket 421 and turns on, the 24th
Return to the main routine shown in the figure.

As a result of the above, the old bobbin unit was collected and specified.
The operator pulls out the heavy needle thread at the needle 56 of the sewing machine 5 and pulls up the diagonal needle thread.

■Installing the specified bobbin unit when no bobbin unit is installed: When the above-mentioned specified No. and set subroutine is finished and sensor S3 is checked, it is not turned on and error 2 is set. In this example, the sewing machine 5 is not equipped with a bobbin unit, and a loop is set to wait for instructions from the host processor MPU.

Therefore, if the operator attaches a bobbin unit to the storage notch that was empty at that time and specifies the same bobbin unit, or specifies the same bobbin unit without attaching a bobbin unit, error 2 will be set again), or Specify a different bobbin unit (it is not necessary to install a bobbin unit in an empty storage notch) and enter the replacement instruction.

In this case, since the bobbin unit is not installed in the sewing machine 5, the sensor S4 is off, and the specified No. and set subroutine is immediately executed to place the storage notch in which the specified bobbin unit is supposed to be stored in the sewing machine 5. make them face each other.

If the designated bobbin unit is not stored in the storage notch and sensor S3 is off, error 2 is set again, but if the designated bobbin unit is stored in the storage notch and sensor S3 is on. , executes the attachment subroutine.

At this time, the sewing machine side thread guide member 51 firmly holds the heavy needle thread (thread that was supplied to the sewing machine 5 from the old bobbin unit collected when setting the error-2), and the fingers 33 of the finger unit 3 are The sewing machine side thread guide member 51 and the chuck of the old bobbin unit are driven to the second state, that is, the fixed bobbin unit is mounted on the sewing machine 5, and the heavy upper thread and the oblique upper thread are connected.

Under the control of the microprocessor CPυ, when the specified bobbin unit is installed and the heavy upper thread and diagonal upper thread are connected, the operator pulls out the heavy upper thread at the needle 56 of the sewing machine 5 and manually removes the diagonal upper thread. Repeat.

(5) Structural Features of the Embodiment The structural features of the automatic needle thread changing device of the sewing machine described above are summarized below.

a: Since the bobbin unit is detachable from the sewing machine 5, it is easy to replace.

b: The thread guide member of the bobbin unit freely guides or holds the thread at a predetermined position facing the sewing machine side thread guide member 51, regardless of the bobbin shape or the amount of thread wound around the bobbin. It becomes easy to cut and connect the thread, and even if the thread is cut after being used, the cut end of the thread will not fall off from the predetermined position.

C: Since the bonding force of the bobbin unit with the sewing machine 5 is greater than the bonding force with the table 135, simply attach the bobbin unit to the sewing machine 5 with the bobbin unit stored in the table 135, and then pull the table 135 apart. The bobbin unit can be mounted, and the control regarding the mounting is simple.

d: Since a plurality of bobbin units can be stored in the table 135, a bobbin unit can be prepared for each type of thread used for sewing at that time, such as thread thickness, thread color, and material.

e: Since the scissors 34 of the finger unit 3 accommodate scissors in the grooves of the occlusal surface, they cut the thread and also prepare the cut thread ends. Also, the end of the thread can be grasped and pulled out.

f: Table unit 1. Since the finger unit 3 and the knock unit 4 are installed on the sewing machine table 6, the sewing machine 5 has the thread guide member 51 on the sewing machine bed 57.
．． Most of the changes are required only by installing the bobbin unit mounting member 58 and sensor S4.The main features are summarized below.

a: Only when thread exchange is performed, table 135 of table unit 1 approaches sewing machine 5, fingers 33 and scissors 34 of finger unit 3 approach sewing machine 5, and knock 44 of knock unit 4 rises, so normally These members do not interfere with the operator's work when sewing.

b: Before cutting the thread, the bushing rod 35 of the finger unit 3 has enough extra length, so the cut thread end is pulled out using the finger 33 and the knock 44
Even when the thread is connected by the needle 56 of the sewing machine 5, the thread does not come off from the needle 56 of the sewing machine 5.

C: Before cutting the thread, the thread is held firmly by the chuck of the thread guide member, and before releasing the chuck, the cut thread end is gripped by the scissors 34, so the thread end does not fall off from the chuck. There isn't.

d: Since the thread exchange operation is not related to the function of the sewing machine 5, it can be applied to a normal sewing machine.

(7) Application In the above embodiment, the bonding force of the bobbin unit to the sewing machine 5 is made larger than the bonding force to the table 135, but this may be reversed. ) at a suitable position where the piston rod can engage when the bobbin unit is installed on the sewing machine 5 (for example).

Sewing machine bed57. On sewing machine table 6, rail 112
When the bobbin unit is retrieved, the table unit 1 moves backward, and when it is installed, the bobbin unit is moved to the sewing machine side using the air cylinder.

In the above embodiment, the thread end of the old needle thread and the thread end of the new thread are tied together by the knock 44, but the two thread guide members
Since both yarn ends are supported facing each other and both ends are trimmed by the scissors 34, an adhesive device that adheres the rain yarn ends with an adhesive can be used instead of a knock. Further, when metal wire is used instead of thread, more bobbin units can be accommodated by using an extending linear table such as a welding device for welding both ends.

In the above embodiment, one table unit 1 is provided for one sewing machine 5, but it may be combined with a plurality of sewing machines. In this case, a rail or a corresponding path to each sewing machine is constructed, and the table unit 1 approaches a predetermined sewing machine as necessary to collect or mount the bobbin unit.

In the embodiments described above, the present invention is applied to a needle thread changing device of a sewing machine, but the present invention is not limited to this. for example,
It can be applied to paper exchange devices for packaging equipment, material exchange devices for basket and net work equipment, wire exchange devices for wire bonding machines, etc.

〔effect〕

As described above, in the cord cutting device of the present invention, the first clamping member and the second clamping member each having an occlusal surface are connected to the cord supported by the cord guiding means and the cord receiving means. are rotatably supported with their respective occlusal surfaces facing each other, and a cutting member extending in the rotational radial direction is provided on the occlusal surface of at least one of the first pinching member and the second pinching member, When a cutting instruction is given, the first
Since at least one of the pinching member and the second pinching member is driven to engage the occlusal surfaces, the cord is automatically cut, and at the same time, the occlusal surface of the first pinching member and the occlusal surface of the second pinching member are cut. Since the cut end of the string is held between the ends of the string, the end is trimmed and bent in an unexpected direction, and the end of the string cut from the string guide means or string receiving means may be bent. Ga-Nuki will never fall.

Furthermore, it is also possible to grip the end of a string that has already been cut or the end of another string, so cutting and gripping can be done with one device, making the device that automatically cuts and grips strings more compact. can do.

[Brief explanation of the drawing]

FIG. 1 is a partially exploded perspective view showing the appearance of an automatic needle thread changing device of a sewing machine in which the present invention is implemented as an example. 2 is a front view of the apparatus shown in FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a right side view of FIG. 2. 5 is a partial enlarged view of FIG. 2 focusing on table unit 1, FIG. 6 is a partial enlarged view of FIG. 3 focusing on table unit 1, and FIG. 7 is a partial enlarged view of FIG. 4 focusing on table unit 1. It is a partially enlarged view. FIG. 8 is a sectional view taken along the line "iii[-■" in FIG. 5, FIG. 9a is an enlarged sectional view of only the guide shaft 2331a shown in FIG. FIG. 9C is an enlarged sectional view of only the slide barrel 2335a shown in FIG. 8. FIG. and skirt 221a
FIG. 11 is a partially enlarged view of FIG. 4 focusing on finger unit 3, and FIG. 12 is a partially enlarged view of FIG. 4 focusing on finger unit 3.
FIG. 13 is a partially enlarged view of FIG. 2 focusing on the finger unit 3. 14 and 15 are plan views showing the operation of the fingers 33 and scissors 34 of the finger unit 3. FIG. FIG. 16 is an exploded perspective view showing the structure of the scissors 34. 17 is a partially enlarged view of FIG. 4 focusing on the knock unit 4, and FIG. 18 is a partially enlarged rear view of the knock unit 4. FIG. 19 is an exploded front view showing the structure of the knock 44. FIG. 20 is a partial perspective view showing the operation of the knock 44. 21a, 21b, 21c, 21d, 21e, 21f, 21g, and 21h are plan views showing the thread connecting operation of the knock 44. FIG. 22 is an air circuit diagram showing the air circuit of the apparatus shown in FIG. 1. FIG. 23 is a block diagram showing the electrical configuration of the device shown in FIG. 1. Figure 24 shows the microprocessor CPU shown in Figure 23.
25, 26, 27, 28, and 29 are flowcharts showing the control operations of FIG. 24, respectively.
3 is a flowchart showing a subroutine of the flowchart shown in the figure. ■ = Child table unit 11: Fixed part 111: Brace 112: Rail 113: Piston rod fixing plate 114: Sensor bracket 12: Moving part 121.122 Ni slide bearing 123 Ni slide base 124 Niji cylinder support plate 125: Sensor bracket 26: Motor bracket 127: Stepping motor 1271: Output gear 128: Sensor bracket 129: Fixed shaft 13: Rotating part 131 Sleeve shaft 1311: E ring 132
: Input gear 133 Ni-slit plate 1331 : Detection slit 134 Ni-last bearing 135 : Table 1351a : Storage notch 13
52a, 1353a: Storage check CYI, CY2
: Air cylinder PII, PI2 : Piston rond Sl, 52, 53 : Sensors 2a, 2b, 2c, 2d : Bobbin unit (string guide device) 21a, 21b, 21c, 21d : Bobbin unit base 211a, 211b, 211c, 211d : Lower plate 212a, 212b, 212c, 212d : Upper plate 2L
3a, 213b, 213c: first spacer 2131a
: Storage stopper pins 2133a, 2133b, 2143b : Installation stopper pins 2132a, 2134a : Compression coil springs 214a, 214b, 214c : Second spacer 22a
, 22b, 22c, 22d: The bobbin receiver is the shaft 221a
Niskart 21a, 21b, 21c, 21d, 22a, 22b, 2
2c, 22d, 221: (Bobbin support device) 23a, 23b, 23c, 23d: Thread guide member (string guide means) 231a, 231b, 231c, 231d
: Pole 232a, 232b, 232c, 232d
Ni guide plates 2321a, 2321b, 2321c, 23
21d: Thread guides 233a, 233b, 23
3c, 233d: Chuck 2331a Ni guide shaft 23311a: Through hole 23312a: Reception groove 23313a, 23314a Ni spring fixing hole 23
315a: First check groove 23316a: Second check groove 23317a: Flange 23318a: Male screw 2335a Nisuride barrel 23351a: Tapered portion 23352a, 23353a: Ball receiver 23354
a: Working pin receiver is groove 2336a, 2337a: Ball 2338a: Holding ring 2339a: Nut BO
Ba, BOBb, BOBc, BOBd: Bobbin (bobbin) THa, THb, T) Ic, THd: Thread (string)
3: Finger unit 31: Fixed part 311: Support arm 312 Guide block 313
:Sensor bracket 32:Transporting part 321.322:Support plate 323,324 Ni-Ride par 325.326:Bushing 327:Fingal scissor bracket 3271:Rod receiver 3272:Rod stopper 33:Finger 331:Left finger member 3311.3312:Operation Pin 3313: Connection pin 332: Left finger member 3321.3322: Action pin 3323: Connection pin 333.334: Pivot shaft 335: Finger action plate 34: Scissor (cord cutting means) 341: First block (first pinching) Part) 3411
: Occlusal surface (occlusal surface) 3412 : Long hole 3414 : Knife storage groove (groove for storing the cutting member) 3
43: Second block (second sandwiching member) 3411:
Occlusal surface (occlusal surface) 3412: Long hole 3413: Support hole 341
4: Knife storage groove (groove for storing the cutting member) 342.
344: Knife (cutting member) 345: Support pin
346: Support block 345.346: (Support means) 3461: Support pin receiver 3462: Support pin fixing bolt 347: Scissor action plate 3471: Piston rod mounting hole 3472.3473: Action pin 3474: E-ring 35: Push rod 351: Pin CY3. CY4. CY5: Air cylinder PI3. P.I.
4. PI5: Piston Rondo CY5. PI5:
(Drive means) 55, S6: Sensor 4: Knock unit 4 construction: Fixed part 411: Support arm 412 Ni guide block 413
: Sensor bracket 42 : Conveyance part 421 : Knock bracket 422.423 Nishi slide bar 424 : Support plate 43 : Rotary solenoid 4421 : Knife edge 4422 : Push knob 4423 : Push groove 4424 : Plate knob 44
3: First clother 4431.4432: Clothing plate 444:
Second clother 4441.4442: Crossing plate 445:
Tying head 4451: Spiral 446: Stripper 4461: Lift lever 447: Scissor 448: Base plate 44
9 spring CY6: Air cylinder PI6: Piston rod S
7. S8: Sensor 5: Sewing machine 51: Thread guide member (string receiving means) 513: Chuck 5131 Ni guide shaft 5132: Taber socket 5133.5134: Compression coil spring 513
5 Nislide barrel 51354: Working bottle holder is groove 5136.5137: Ball 5138: Holding ring 5139: Nut 514
: Thread guide 52: First thread guide 53: Second thread guide 54: Tensioner 55: Take-up lever 56 Two needles 57: Sewing machine bed (fixing member) 58: Bobbin unit attachment member (attachment means) 581: Attachment plug 582: Attachment check S4: Sensor
LPI, LP2: Lamp 6: Sewing machine table P■ρ: Air source Con: Constant pressure adjustment unit S
CI 1.5C12, SC2, 5C31, 5C32, 5
C41, 5C42, SC5, 5C61. 5C62: Throttle valve MPU: Host processor (instruction means) CPU: Microprocessor (energizing control means) Drl Varnish chipping motor driver Dr2: Solenoid driver (energizing means) Dr3: Lamp driver Patent applicant Yuki Iizuka, Director of the Agency of Industrial Science and Technology 18th ward door 20 diagram 21a 7% 21b ”EJ voice 2
18 Cause Voice 211 Into 21Cz % 21d Illustration Evening 219

Claims (5)

[Claims] (1) A bobbin around which a string is wound; bobbin support means for supporting the bobbin; and string guide means coupled to the bobbin support means for guiding the string wound around the bobbin to a predetermined guiding position; a string guide device; a string receiving means for receiving the string wound around the string guide device; a fixing member to which the string receiving means is fixed; a fixing member for mounting the string guide device. an attachment means substantially fixed to; a first pinching member having an occlusal surface;
a second clamping member having an occlusal surface opposite to the occlusal surface of the clamping member; a support means for rotatably supporting the first clamping member and the second clamping member; and at least the first clamping member and the second clamping member. String cutting means provided on either one of the occlusal surfaces and extending in the rotational radial direction; Rotatably driving at least one of the first pinching member and the second pinching member of the string cutting means, respectively. a driving means for biting the occlusal surface; a biasing means for biasing the driving means; an instruction means for instructing cutting of the cord; and, in response to the cutting instruction, instructing the biasing means to bias the driving means. A cord cutting device comprising: biasing control means; (2) The string cutting means includes two cutting members that are provided on the occlusal surfaces of the first pinching member and the second pinching member, respectively, and that form a pair of scissors. ) The string cutting device described in item 2. (3) The cord cutting device according to claim (2), wherein each cutting member is provided at a position that bisects the occlusal surface of the first pinching member and the second pinching member. (4) The occlusal surface of the first pinching member has a groove for accommodating the cutting member provided on the occlusal surface of the second pinching member during occlusion; having a groove for accommodating a cutting member provided in the surface;
A string cutting device according to claim (3). (5) The cord cutting device according to claim 1, wherein the mounting means is detachable from the bobbin support means of the cord guide device.