JPS5846576B2 - Warp yarn stopping method and fixed position stopping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly used in a warping machine to detect the cutting of warp threads wound at a constant feeding speed on a rotationally driven beam, or the detection of fuzzed parts of warp threads or parts of warp threads with foreign matter attached, The present invention relates to a method and apparatus for stopping a cut end of a warp, a fluffed portion of a warp, or a portion of a warp to which foreign matter is attached at a certain position by braking a beam to a stop.

When warping spun yarn in a warping machine, as shown in FIG. 3 and the yarn breakage detection device 4 installed at the front end of the creel 1, the yarn is forwarded to the warper main body 5 at a constant feeding speed. After passing through the installed rear reed 6, the front and rear reeds 7 installed at the front, and the length measuring roller 8 which is pivotally supported at a position immediately before the front reed, the length measuring roller 8 is rotatably supported at a position below the length measuring roller 8 and rotated at a gradually decreasing rotation speed. The thread is wound on the surface of the driven beam 9 with a gradually increasing diameter at a constant feeding speed.

However, the spun yarn set in the warper is often cut before it is unwound from the cheese 2 and passes through the yarn tension adjustment device 3 nearby.

In such a case, the front cut end of the cut yarn is fed forward through the yarn tension adjustment device 3, and the yarn breakage detection device 4 outputs an output signal, which applies braking to the beam 9 and controls the warping machine. Operation stops.

Then, the front and back ends of the yarn are tied together and the warping machine is operated again.

However, each time the yarn breakage detection device outputs and braking is applied to the beam, the winding diameter and rotation speed of the beam differ, and therefore the angular momentum of the beam differs, and in conventional warping machines, Since the braking moment applied to the beam is constant, the braking time of the beam or the braking distance of the warp yarns is not constant, and the positions at which the front ends of the yarns stop are different.

For example, if the front end of the thread is caught in the beam 9 and stopped, when tying both ends of the thread, the beam 9 is rewinded in the reverse direction to find the end of the thread, while the cheese 2 is also pulled out. It takes time to pass the cut end of the thread through the rear reed 6 and the front reed 7.

Further, if the cut end of the thread is stopped between the rear reed 6 and the front reed I, it takes time to pass the cut end of the thread pulled out from the cheese 2 through the rear reed 6.

Therefore, if the cut end of the thread always stops at a position behind the rear reed 6, that is, the rearmost reed of the warping machine main body 5, the above-mentioned trouble is not required, and the work of tying the thread becomes more efficient. This is often done, but with conventional warping machines, the cut end of the thread does not always stop at such a position.

When filament yarn is warped using a warping machine, it is extremely rare for the yarn to break like in the case of spun yarn mentioned above, but since the yarn may become fluffed due to friction in the previous process, It is necessary to find a fuzzed part of the thread that causes problems such as thread breakage in the process, stop the operation of the warping machine, cut off the part, and tie both cut ends of the thread.

For this purpose, a fuzz detection device is provided in front of the rear reed 6 of the warping machine body, and an output signal from this device applies braking to the beam 9 to stop the operation of the warping machine.

However, in conventional warping machines, as in the case of the above-mentioned spun yarn, the positions where the fluffed portion of the yarn stops are different.

When the fluffed part of the yarn stops at a position where it touches the circumferential surface of the length measuring roller 8, that position is close to the position of the warper driver, and the circumferential surface of the length measuring roller 8 is connected to a large number of parallel The color makes it easy to find fluffy threads within the thread, making it easier for the operator to pick out the fluffy threads, cut off the fuzzed part of the thread, and tie both ends of the thread together more efficiently. However, with conventional warping machines, the fluffed part of the yarn did not always stop at such a position.

In addition, when warping spun yarn in a warping machine, foreign matter such as waste yarn or fluff may be attached to the yarn, so foreign matter adhering to the yarn may cause problems such as yarn breakage in the subsequent process. It is necessary to find the part, stop the warping machine, and pick out the foreign matter attached to the thread.

For this purpose, a foreign object detection device is provided in front of the rear reed 6 of the warping machine body, and an output signal from this device applies braking to the beam 9 to stop the operation of the warping machine.

However, in conventional warping machines, as in each of the above cases, the positions at which the foreign matter-attached portion of the yarn is stopped are different.

If the thread is stopped at a position where the part of the thread that has foreign matter attached comes into contact with the circumferential surface of the length measuring roller 8, the operator can efficiently pick up the foreign matter that has adhered to the thread, as in the case of the filament thread described above. In conventional warping machines, the part of the yarn where foreign matter is attached does not always stop at such a position.

In view of the above-mentioned conventional situation, the present invention detects the cutting of warp threads wound at a constant feeding speed on a rotationally driven beam, the fuzzed part of the warp threads, or the part of the warp threads to which foreign matter is attached, and brakes the beam to stop the warp threads. To provide a fixed position stopping method and a fixed position stopping device for warp threads, which can always stop the cut ends of the warp threads, the fluffed parts of the warp threads, or the parts of the warp threads to which foreign matter is attached at a fixed position.

In the present invention, in conventional warping machines, the reason why the cut end of the warp, the fluffy part of the warp, or the foreign matter adhering part of the warp stops at different positions is due to the cutting of the warp, the fluffy part of the warp, or the adhesion of foreign matter to the warp. Every time a part is detected and braking is applied to the beam, the winding diameter and rotational speed of the beam differ, and therefore the braking moment applied to the beam is constant, even though the angular momentum of the beam differs. The braking moment applied to the beam is made to have a magnitude corresponding to the angular momentum of the beam at that time.

Therefore, let's find the relationship between the angular momentum of the beam and the braking moment.

The angular momentum of a beam having a moment of inertia J rotating at a rotational speed N is J·2πN, and the braking moment M required to stop the beam having an angular momentum J·2πN in a braking time T is the well-known motion From the equation, ignoring higher-order infinitesimal quantities, we get *.

The moment of inertia J of a beam with a string wrapped around it is the moment of inertia of a beam with no string wrapped around it)J.

and the moment of inertia of the cylindrical thread layer wound around the beam)J(
R), which is J-Jo+J(R) (2).

Further, the moment of inertia J (R) of the cylindrical yarn layer is assumed to be equal to the moment of inertia of a cylindrical body having an outer radius R1, an inner radius r, a width H, and a density ρ.

Therefore, by substituting this equation (3) into equation (2) and substituting equation (2) into equation (1), we obtain the following.

On the other hand, the thread feeding speed (■) is constant and equal to the speed of the surface of the thread layer of the beam, and has the following relationship between the rotational speed N of the beam and the outer radius R of the thread layer of the beam.

If we transform this equation (5) and express the rotational speed N of the beam as the outer radius R of the beam's thread layer and the thread feeding speed ■, When R is expressed by the rotational speed N of the beam and the thread feeding speed ■, it becomes as follows.

Substituting this equation (6) into equation (4) and rearranging it, we find that the braking moment M required to stop the beam in braking time T
is determined as a function of the outer radius R of the thread layer of the beam.

That is, it becomes.

By substituting this equation (8) into equation (7), the braking moment M required to stop the beam in the braking time T can be found as a function θ of the beam rotation speed N.

That is, the winding diameter R or rotational speed N of the beam when applying braking is detected, and the beam at that time is controlled for a constant braking time T using the above equation (7) or (9). The braking moment M required to stop the vehicle can be determined.

That is, the present invention detects the winding diameter R or the rotation speed N of the beam, and calculates the braking moment M necessary to stop the beam in a certain braking time T from the winding diameter R or the rotation speed N. This is a method for stopping warp threads in a fixed position, which is characterized by braking the beam with this braking moment M to stop the cut end of the warp thread, the fluffed part of the warp thread, or the part of the warp thread with foreign matter attached to a fixed position.

The present invention also provides a device for detecting the winding diameter or rotational speed of a beam, a cam device whose driving part is driven according to the output amount of this device, and a beam detecting device that detects a beam diameter or rotation speed according to the amount of movement of a driven section of this cam device. This is a fixed position stopping device for warp yarns, characterized in that it is provided with a device for adjusting the braking moment of the warp threads.

In the method of the present invention, regardless of the magnitude of the angular momentum of the beam when braking the beam by detecting warp thread cutting, warp thread fuzzing, or warp thread foreign matter adhesion parts, the method always detects warp thread cutting ends or warp thread fuzzing. Since the part or the part of the warp to which foreign matter is attached stops at a certain position, for example, the position where the cut end of the warp stops is set to a position behind the reed located at the rearmost position of the warping machine main body, or the fuzzed part of the warp or the warp By setting the warping machine at a position where the foreign matter adhered part stops and is in contact with the length measuring roller of the warping machine body, it can be used for tying both ends of the warp threads, removing the fluffy part of the warp threads, or picking up foreign matter attached to the warp threads. Work can be carried out efficiently at all times, and the time when the warping machine, etc. is stopped can be shortened and its operating rate can be increased.

Furthermore, since the device of the present invention has a cam device interposed between the device for detecting the winding diameter or rotation speed of the beam and the device for adjusting the braking moment of the beam, the amount of movement of the driving part of the cam device can be By appropriately selecting a cam curve that indicates the amount of movement of the driven part, for example, the winding diameter or rotation speed of the beam and the amount of movement of the driving part of the cam device are directly proportional, and the amount of movement of the driven part of the cam device and the amount of movement of the beam can be directly proportional to each other. If the braking moment is directly proportional, by making the cam curve the curve given by equation (7) or (9) above, the braking moment of the beam can be adjusted to the amount necessary to stop the beam in a certain braking time. The braking moment can be adjusted to a braking moment, and by braking the beam, the cut end of the warp, the fluffed part of the warp, or the part of the warp to which foreign matter is attached can be stopped at a certain position.

Therefore, the method of the invention described above can be implemented.

In addition, a cam device with a simple structure is used as the device for determining the braking moment necessary to stop the beam in a fixed braking time from the beam diameter or rotation speed, so the structure is simple. be.

Next, an embodiment in which the present invention is applied to a warping machine will be described.

The warping machine equipped with the fixed position stopping device of this example supports a rotatably driven beam 9 between the left and right machine frames, as shown in the implied side view of FIG. , beam 9
A length-measuring roller 8 is pivotally supported, through which the warp threads to be wound up come into contact, and a pivot 10 is pivotally supported at a rear position of the length-measuring roller 8.
The upper ends of L-shaped arms 11 are fitted to the left and right ends of the pivot shaft 10, respectively, and between the lower ends of the double-shaped arms 11, a press roller 12 is pivotally supported, which presses against the rear side of the winding surface of the beam 9. beam 9
Braking mechanisms 13, 14 and 15 having similar structures are provided on the length measuring roller 8 and the press roller 12, respectively.

These braking mechanisms 13, 14, and 15 are semicircular arc-shaped brake drums 16 fixed to the beam 9 and one end pivoted to the machine frame. Two brake shoes 17 are arranged facing each other, and an oval-shaped cam 19 fixed to a camshaft 18 that is pivotally supported on the machine frame is arranged between the free ends of both brake shoes 17, and one end is attached to the camshaft 18. The other end of the lever 20 fitted with the lever 20 is pivotally connected to the tip of a piston rod 24 protruding from the other end of the cylinder 21, one end of which is pivotally connected to the machine frame side. When air is pressurized into the first chamber, the restoring helical spring 25 fitted in the second chamber of the cylinder is compressed by a force of 1'', the piston rod 24 is pushed out, and the elliptical cam 19 passes through the lever 20 and the camshaft 18. As it rotates, the free ends of both brake shoes 17 are pressed outward, and the outer surfaces of both brake shoes 17 are brought into pressure contact with the inner peripheral surface of the brake drum 16, so that braking is applied to the beam 9. .

In the fixed position stopping device of this example, the press roller 12 is
A pivot 10 that rotates as it rotates rearward about
As shown in the side view of FIG. 3, the upper end of the lever 26 is fitted, and the rectangular plate-shaped movable plate 28 is mounted on the machine frame side at the forward position of the lower end of the lever 26, with its longitudinal direction extending approximately in the front-rear direction. The lower end of the lever 26 and the rear end of the movable plate 28 are connected by a connecting rod 27, and the upper surface is attached to the plate surface of the vertically mounted movable plate 28 as a cam surface. 3
The plate surfaces of the cam plate 29, each of which has a substantially rectangular plate shape set at 0, are aligned in the longitudinal direction of the screen and overlapped, and the cam plate 29 is removably fixed to the movable plate 28 with two bolts, and the upper position of the movable plate 28 is The central bent part of the L-shaped bar 31 is pivotally attached to the machine frame side of the machine, and the roller 33 is pivotally supported at the lower end of the front side of the L-shaped bar 31.
, the cam surface 3 of the cam plate protruding from the upper side of the movable plate 28
A pressure regulating valve 35 with a protruding adjustment shaft 36 for adjusting the air pressure to the brake cylinder 21 of the beam is mounted above the L-shaped bar 31 on the machine frame side. A pressure regulating valve 3 is installed in a screw hole penetrated through a small shaft 34 that is pivotally supported.
The adjustment shaft 36 is threaded through the threaded part of the adjustment shaft 36 that protrudes forward from the shaft 10, and as the lever 26 rotates rearward due to the rotation of the pivot 10, the movable plate 28 and the cam plate 29 move backward via the connecting rod 2T. , the position of the cam surface 30 of the cam plate that is in pressure contact with the roller 33 at the lower end of the L-shaped bar moves, and the roller 33 at the lower end of the L-shaped bar moves up and down according to the height of the cam surface 30 of the cam plate, that is, according to the cam curve. The L-shaped bar 31 rotates according to the amount of movement of the roller 33, and the adjustment shaft 36 is pushed into the pressure regulating valve 35 or pushed into the pressure regulating valve depending on the amount of rotation of the L-shaped bar 31. The regulated pressure of the pressure regulating valve 35 is pulled out from the regulating shaft 36.
It is adjusted according to the amount of movement.

Eventually, as the press roller 12 rotates rearward about the pivot shaft 10, the cam plate 29 retreats and the L-shaped bar 3
1 rotates, and the adjustment pressure of the pressure adjustment valve 35, which becomes the air pressure to the brake cylinder 21 of the beam, changes in accordance with the cam curve of the cam plate 29.

Note that when the adjustment shaft 36 is rotated to move back and forth, the cam plate 29
The reference pressure of the regulating pressure of the pressure regulating valve 35 changes according to the cam curve of the pressure regulating valve 35.

In the pneumatic circuit diagram of FIG. 4, 21 is the brake cylinder for the beam described above, and 37 is an operation stop switch of the warping machine that is activated by the output signal of the yarn breakage detection device, fuzz detection device, or foreign matter detection device installed in the warping machine. 35 is the above-mentioned pressure regulating valve, 22 is the length measuring roller braking cylinder, 23 is the press roller braking cylinder, and 38 is an electromagnetic switching valve that operates in the same manner as the above-mentioned electromagnetic switching valve 37. 39 is a pressure regulating valve, and 40 is a high pressure air source.

When the electromagnetic switching valves 37 and 38 operate, this air circuit
The air from the high pressure air source 40 is connected to the pressure regulating valve 35 and the electromagnetic switching valve 3.
7, the air at the pressure regulated by the pressure regulating valve 35 flows into the beam brake cylinder 21, while
The air from the high pressure air source 40 is connected to the pressure regulating valve 39 and the electromagnetic switching valve 3.
8 and at a pressure regulated by a pressure regulating valve 39 flows into the brake cylinder 22 of the measuring roller and the brake cylinder 23 of the press roller.

When the warping machine is operated by rotating the warping machine, the warp threads are wound on the rotationally driven beam 9 at a constant feeding speed, and as the winding diameter of the beam 90 increases, the beam 90 The number of revolutions decreases while the press roller 1
2 rotates rearward about the pivot shaft 10, and as described above, the cam plate 29 retreats, the L-shaped bar 31 rotates, and the pressure regulating valve 3 provides air pressure to the beam brake cylinder 21.
The adjustment pressure 5 changes according to the cam curve of the cam plate 29.

During the operation of the warping machine, the yarn breakage detection device, fuzz detection device, or foreign object detection device outputs an output, or the operation stop switch of the warping machine is activated, and the operation of the motor that rotationally drives the beam 9 is stopped. On the other hand, when the electromagnetic switching valves 37 and 38 operate, the air at the pressure that was being regulated by the pressure regulating valve 35 at the time of activation is transferred to the beam brake cylinder 2.
1, and a braking moment corresponding to the pressure is applied to the beam 9. At the same time, air with a pressure adjusted by the pressure regulating valve 39 also flows into the braking cylinder 22 of the length measuring roller and the braking cylinder 23 of the press roller. Then, length measuring roller 8
A braking moment corresponding to the pressure is applied to each of the press rollers 12 and 12, and the beam 9, length measuring roller 8, and press roller 12 are stopped for a braking time corresponding to their respective braking moments.

Therefore, the winding diameter of the beam 9 and the retraction amount of the cam plate 29 are L
Since the moving amount of the roller 33 at the lower end of the shaping bar and the braking moment applied to the beam 9 are directly proportional to each other, ignoring high-order minute amounts, the cam curve of the cam plate 29 can be adjusted to keep the beam constant. By forming the curve given by equation (7) above, which expresses the braking moment M required to stop the beam in braking time T as a function of the beam diameter R, the beam 90 angle when braking is applied. Regardless of the magnitude of the momentum, the beam 9 can always be stopped in a fixed braking time, and therefore the cut end of the warp, the fluffed part of the warp, or the part of the warp to which foreign matter is attached can always be stopped at a fixed position.

Therefore, the length of the warping machine body should be determined so that the cut end of the warp stops at a position behind the rearmost reed of the warping machine body, or the position where the fuzzed part of the warp thread or the part of the warp thread with foreign matter stops stops. By setting the position so that it is in contact with the rollers, the work of tying both ends of the warp threads, removing the fluffy parts of the warp threads, or picking up foreign objects attached to the warp threads can be carried out efficiently at all times, and the stop time of the warping machine is reduced. It is possible to shorten the time and increase the operating rate.

In addition, after setting the braking time of the beam 9, the braking time of the measuring row 28 and the press roller 12 are added to the set braking time.
Match the braking times.

Then, when the warping machine stops operating, the beam 9 and length measuring roller 8
and the press roller 12 stop in synchronization, warp tension changes and length measurement errors caused by uneven stop times of the beam 9 and length measuring roller 8, and press rollers caused by uneven stop times of the beam 9 and press roller 12. Damage to the warp threads due to warp thread friction is prevented.

The fixed position stopping device of this example is a device that calculates the braking moment necessary to stop the beam in a fixed braking time from the winding diameter of the beam, and a cam plate 29 of the driving part, which is a device with a simple structure, and a driven part. Since a cam device consisting of an L-shaped bar 31 is used, the structure is simple.

In addition, since the press roller device already installed in the warper is used as the device for detecting the beam diameter, the structure is simpler than installing a new device to detect the beam diameter. It is simple and can be easily attached to an existing warping machine.

Although the fixed position stopping method and fixed position stopping device of the embodiment are as illustrated above, they may be modified as illustrated below.

(1) Detect the number of rotations of the beam instead of the winding diameter of the beam, and use the above-mentioned formula (9) from this number of rotations N,
The braking moment M required to stop the beam in a constant braking time T is determined.

(2) Instead of the beam of a warping machine, it is applied to the winding beam of a warp sizing machine or a rewinding machine, and these beams are stopped after a certain braking time to remove the cut ends of warp threads or the fuzzed parts of warp threads. Alternatively, the part of the warp threads to which foreign matter is attached is stopped at a fixed position, and rotating parts such as length measuring rollers and press rollers are stopped in synchronization with the beam.

[Brief explanation of the drawing]

Fig. 1 is a side view of the warping machine, Fig. 2 is a implied side view of the winding section of the warping machine equipped with the fixed position stop device of the embodiment, Fig. 3 is a side view of the same device, Fig. 4 is an air circuit diagram of the same device. 4: Yarn breakage detection device, 5: Warping machine body, 6: Rear reed, 8
: Length measuring roller, 9: Beam 12 Nibbles roller, 13
: Beam braking mechanism, 14: Measuring roller braking mechanism, 1
5 Braking mechanism of nibbles roller, 21; Braking cylinder of beam, 22: Braking cylinder of length measuring roller, 23 Braking cylinder of nibbles roller, 29: Cam plate, 31: L-shaped bar 35: Pressure adjustment valve.

Claims (1)

[Scope of Claims] 1. A warp stopping method in which the beam is braked and stopped by detecting cutting of warp threads wound at a constant feeding speed on a rotationally driven beam, or detecting a fuzzed part of the warp threads or a part of the warp threads to which foreign matter is attached, Detect the winding diameter or rotation speed of the beam, calculate the braking moment necessary to stop the beam in a certain braking time from this winding diameter or rotation speed, and brake the beam with this braking moment to control the warp threads. 1. A method for stopping warp threads in a fixed position, which comprises stopping a cut end, a fuzzed part of the warp thread, or a part of the warp thread to which foreign matter is attached at a fixed position. 2. In a warp stopping method that detects the breakage of warp threads wound at a constant feeding speed on a rotationally driven beam of a warper and brakes the beam to stop the beam, the position at which the cut end of the warp thread stops is located on the main body of the warper. 2. The method for stopping warp threads in a fixed position according to claim 1, wherein the warp threads are stopped at a position rearward than the rearmost reed. 3 In a warp stopping method in which the beam is braked and stopped by detecting the fuzzed part of the warp wound at a constant feeding speed on the rotationally driven beam of the warping machine or the part of the warp on which foreign matter has adhered, the fuzzed part of the warp or the warp 2. The method for stopping warp yarns at a fixed position according to claim 1, wherein the position where the foreign matter-attached portion of the warp yarns stops is a position in contact with a length measuring roller of a warping machine main body. 4. The fixed position of the warp yarns according to claim 1, 2 or 3, wherein the braking time of the beam is equal to the braking time of the length measuring roller and the braking time of the press roller. How to stop. 5 A warp that is wound around a rotationally driven beam at a constant feed speed and is equipped with a device that detects the cutting of the warp, a fuzzed portion of the warp, or a portion of the warp that has foreign matter attached to it, and a device that brakes and stops the beam based on the output signal of this device. The stopping device includes a device that detects the winding diameter or rotation speed of the beam, a cam device whose driving part is driven according to the output amount of this device, and a device that detects the beam diameter or rotation speed according to the amount of movement of the driven part of this cam device. A fixed position stopping device for warp threads, characterized in that a device for adjusting a braking moment is provided. 6. The warp yarn fixed position stopping device according to claim 5, wherein the device for detecting the winding diameter of the beam is a press roller device. 7. Claim 5 or 6, characterized in that the rotationally driven beam is a beam installed in a warping machine.
Warp thread fixed position stopping device as described in Section 1.