JP3496476B2 - Shedding device in loom - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling position where an eccentric wheel fitted to a drive shaft so as to be rotatable relative to the drive shaft and the drive shaft integrally rotate, and the drive shaft rotates relative to the eccentric wheel. The present invention relates to an opening device in which a locking body is arranged to be switched to a coupling release position, and a connecting wheel which is relatively rotatably fitted to the eccentric wheel is connected to a driving force transmission system for moving a heddle frame up and down. is there.

[0002]

2. Description of the Related Art When a heddle frame is held in an upper opening or a lower opening, the locking body is placed at a coupling releasing position. When the heddle frame is moved up and down, the lock body is arranged at the connecting position. When the lock body is arranged at the connecting position, the eccentric wheel rotates integrally with the drive shaft, and the connecting wheel turns about the drive shaft. Due to this turning motion, the heddle frame moves up and down. When the lock body is arranged at the uncoupling position, the eccentric wheel does not rotate integrally with the drive shaft, and the heald frame is held at the upper opening or lower opening position. One such selection mechanism is required for each heald frame. In this type of device, it is necessary to accurately switch the heald frame between the upper opening position and the lower opening position according to a pre-programmed opening pattern.

The conventional device disclosed in Japanese Patent Laid-Open No. 5-247769 incorporates a device for detecting whether or not the heald frame is arranged at a preprogrammed height position. A micro switch that detects when the main lever is at the swing end and a micro switch that detects when the main lever is in the middle of swing are used. A pair of magnets are attached to the tip of the main lever for moving the heddle frame up and down, and a pair of Hall effect sensors are arranged near the swinging region of the tip of the main lever.

[0004]

When the height position of the heddle frame is different from the pre-programmed height position, stopping the operation of the loom as soon as possible facilitates the subsequent repair work. Desirable above. For that purpose, whether the heddle frame will move toward the upper opening position or the lower opening position next while the heddle frame moves from one of the upper opening position and the lower opening position to the other, that is, when the main lever is in the middle of swinging. Should be detected. In the conventional device disclosed in Japanese Unexamined Patent Publication No. 5-247769, based on the combination of ON-OFF of the pair of micro switches and the pair of Hall effect sensors, the heddle frame is next in the upper opening position when the main lever is in the middle of swinging. It is possible to determine which one of the lower opening position and the lower opening position the head is heading. But for that, two microswitches, two
2 for Hall effect sensors and even Hall effect sensors
Requires two permanent magnets. These sensor devices
The number of switches, the number of sensors, and the number of magnets required for each of the selection mechanisms for the number of heddle frames increase the cost of the opening device.

It is an object of the present invention to provide a selection mechanism in an opening device that can predict the height position of a heddle frame at low cost.

[0006]

To this end, the present invention is directed to a coupling position for transmitting the driving force of the drive shaft to an eccentric wheel that is relatively rotatably fitted to the drive shaft, and a drive shaft for the eccentric wheel. A coupling wheel that is provided with a lock body that is switched to a coupling release position that allows relative rotation, and that is connected to the eccentric wheel so as to be rotatable relative to a driving force transmission system for vertically moving the heddle frame. In the invention of claim 1, a frame position indicator for instructing the height position of the heald frame in conjunction with the movement of the heddle frame and a moving position of the frame position indicator at a predetermined position are intended for the connected opening device. An opening device having a frame position detecting means for detecting is configured, and one of the frame position indicator and the frame position detecting means is one and the other is two, and the frame position indicator and the A single body of the frame position detecting means and one of a plurality of bodies The first set is the first set, and the first detection position state when the frame position indicator in the first set is in the detection area of the frame position detection means in the first set is the upper opening of the heddle frame. A pair of the other one of the plurality of bodies and the single body is made to correspond to one of the position and the lower opening position to form a second set, and the second region is set in the detection area of the frame position detection means in the second set. The second detection position state when there is a frame position indicator in the pair of sets corresponds to the position in the middle of movement from the other of the upper opening position and the lower opening position of the heddle frame to the one in the first set. A third detection position state intermediate between the detection position state and the detection position state in the second set corresponds to a position in the middle of movement from the one of the upper opening position and the lower opening position of the heddle frame to the other. And the frame position indicator is the frame position detecting means. A fourth position which is not in the detection area and which goes through the first detection position state and the third detection position state as the heald frame moves from the one of the upper opening position and the lower opening position to the other The detection position state of No. 1 corresponds to the other of the upper opening position and the lower opening position, and the first detection position state, the second detection position state,
The detection timings in the third detection position state and the fourth detection position state are the same predetermined timing.

At a predetermined timing corresponding to the middle of the movement of the heddle frame from one of the upper opening position and the lower opening position to the other, the frame position detecting means in the first set makes the frame position detecting means in the first set When the position indicator is detected, the heald frame is located at one of the upper opening position and the lower opening position which is predetermined. When the frame position detecting means in the second set detects the frame position indicator in the second set,
The heddle frame faces a predetermined one of the upper opening position and the lower opening position. When a third detection position state intermediate between the detection position state in the first set and the detection position state in the second set is obtained, the heddle frame sets the upper opening position and the lower opening position to one of the upper opening position and the lower opening position. I am heading for one other than the one decided. Therefore, when the heddle frame is moving from one of the upper opening position and the lower opening position to the other, the direction in which the heddle frame is directed is known.

According to a second aspect of the present invention, the number of the frame position indicators is two, the number of the frame position detecting means is one, and a set of the first frame position indicator and the frame position detecting means is the first. The first detection position state when there is the first frame position indicator in the detection area of the frame position detection means in the first set is the upper opening position and the lower opening position of the heddle frame. The second frame position indicator and the frame position detecting means are associated with one of the second set, and the second frame position is set in the detection area of the frame position detecting means in the second set. The second detection position state when there is a pointer is made to correspond to a position in the middle of movement from the other of the upper opening position and the lower opening position of the heddle frame to the first frame position indicator and the second frame position indicator. Third when the detection area of the frame position detection means is between the frame position indicator
The detection position state of the heald frame corresponding to a position in the middle of moving from the one of the upper opening position and the lower opening position of the heddle frame, the frame position indicator is not in the detection area of the frame position detecting means, and As the heddle frame moves from the one of the upper opening position and the lower opening position to the other, the fourth detection position state is reached through the first detection position state and the third detection position state. The detection timing in each of the first detection position state, the second detection position state, the third detection position state, and the fourth detection position state is made to correspond to the other of the opening position and the lower opening position, and the detection timing is the same. It was timing.

When the frame position detecting means detects the first frame position indicator at a predetermined timing corresponding to the middle of the movement of the heddle frame from one of the upper opening position and the lower opening position to the other. The heddle frame is at a predetermined one of the upper opening position and the lower opening position. When the frame position detection means detects the second frame position indicator, the heald frame is moving toward a predetermined one of the upper opening position and the lower opening position. When the third detected position state is obtained, the heddle frame is moving toward the upper opening position or the lower opening position other than the predetermined one. Therefore,
The direction in which the heddle frame faces can be seen when the heddle frame is moving from one of the upper opening position and the lower opening position to the other.

According to a third aspect of the present invention, the number of the frame position indicator is one, the number of the frame position detecting means is two, and the combination of the frame position indicator and the first frame position detecting means is the first. The first detection position state when there is the frame position indicator in the detection area of the first frame position detection means in the first set is the upper opening position and the lower opening position of the heddle frame. Corresponding to one, the set of the frame position indicator and the second frame position detecting means is defined as a second set, and the frame position indicating area is set in the detection area of the second frame position detecting means in the second set. The second detection position state when the body is present is made to correspond to the position in the middle of movement from the other of the upper opening position and the lower opening position of the heddle frame to the detection area of the first frame position detecting means and the first detection position. A third detection position when the frame position indicator is between the detection region of the second frame position detection means and the detection region. The state is made to correspond to a position in the middle of movement from the one of the upper opening position and the lower opening position of the heddle frame to the other, the frame position indicator is not in the detection region of the frame position detection means, and the heddle frame is Is moved from the one of the upper opening position and the lower opening position to the other, and the fourth detection position state is reached through the first detection position state and the third detection position state. The detection timings in the first detection position state, the second detection position state, the third detection position state, and the fourth detection position state are set to the same predetermined timing in correspondence with the other of the lower opening positions. .

When the first frame position detecting means detects the frame position indicator at a predetermined timing corresponding to the middle of the movement of the heddle frame from one of the upper opening position and the lower opening position to the other. The heddle frame is at a predetermined one of the upper opening position and the lower opening position. When the second frame position detecting means detects the frame position indicator, the heald frame is moving toward a predetermined one of the upper opening position and the lower opening position. When the third detected position state is obtained, the heddle frame is moving toward the upper opening position or the lower opening position other than the predetermined one. Therefore,
The direction in which the heddle frame faces can be seen when the heddle frame is moving from one of the upper opening position and the lower opening position to the other.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS.

Reference numeral 11 denotes a drive shaft, and an eccentric wheel 12 is supported on the drive shaft 11 so as to be relatively rotatable. A connecting wheel 13 is fitted and connected to the peripheral surface of the eccentric wheel 12 so as to be relatively rotatable. A swing lever 21 is connected to the connecting wheel 13. Swinging of the swing lever 21 about the support shaft 37 is converted into vertical movement of a heddle frame (not shown) via a driving force transmission system (not shown).

The first frame position indicator 38 and the second frame position indicator 3 are provided on the peripheral surface of the base end portion 211 of the swing lever 21.
9 is fastened. Base end 21 of swing lever 21
A proximity switch 40 is arranged on the side of 1. The detection area of the proximity switch 40 is set on the swing locus of the first frame position indicator 38 and the second frame position indicator 39 accompanying the swing of the swing lever 21. The first frame position indicator 38 or the second frame position indicator 39 is the proximity switch 40.
And the proximity switch 40 outputs an ON signal to the loom control computer C.

As shown in FIG. 2, the cam body 1 is attached to the eccentric wheel 12.
4 are integrally formed. The peripheral surface of the cam body 14 is a cam surface, and a pair of holding recesses 141, 14 are provided on the cam surface.
2 is formed at a rotationally symmetrical position of half rotation. Cam body 1
A lock lever 15 and an auxiliary lever 16 which serve as a lock body are rotatably supported on the side surface of 4 around the support shafts 17 and 18. One ends of the locking lever 15 and the auxiliary lever 16 are engaged with each other, and a tension spring 19 is interposed between the engaging ends of the locking lever 15 and the auxiliary lever 16. A locking protrusion 151 is integrally formed at the engaging end of the locking lever 15. The other ends 152 and 161 of the lock lever 15 and the auxiliary lever 16 extend to positions corresponding to the holding recesses 141 and 142 when viewed in the axial direction of the drive shaft 11.

A drive disc 20 is supported on the drive shaft 11 so as not to rotate relative to it, and the drive shaft 11 and the drive disc 20 rotate integrally. A pair of engaging recesses 201 and 202 are formed on the peripheral surface of the drive disc 20 at half rotationally symmetrical positions. The locking projection 151 of the locking lever 15 has an engaging recess 20.
1, 202 can be fitted. The tension spring 19 urges the lock lever 15 and the auxiliary lever 16 to rotate in the direction in which the lock protrusion 151 fits into the engagement recesses 201 and 202.

A stopper 143 is projectingly provided on the cam body 14. The other end portion 152 of the lock lever 15 when the lock protrusion 151 is in the engagement recesses 201 and 202.
Contacts the stopper 143. When the lock protrusion 151 does not enter the engaging recesses 201 and 202, the drive shaft 11 idles with respect to the eccentric wheel 12, and the lock protrusion 151 rotates once for each half rotation of the drive shaft 11. The engaging recesses 201 and 202 are opposed to each other. When the locking projection 151 is in the engagement recesses 201 and 202, the drive shaft 11
And the eccentric wheel 12 rotate integrally.

A switching lever 22 and a positioning lever 23 are arranged in parallel beside the rotation locus of the cam body 14. The switching lever 22 and the positioning lever 23 are rotatably supported on a support shaft 24. The rotation locus of the tip end portion 221 of the switching lever 22 intersects with the rotation loci of the lock lever 15 and the other end portions 152 and 161 of the auxiliary lever 16. A rotor 231 is attached to the tip of the positioning lever 23, and the rotor 23 with the support shaft 24 as the center.
The rotation locus of No. 1 intersects with the rotation loci of the other ends 152 and 161 of the lock lever 15 and the auxiliary lever 16. Further, the rotor 231 contacts the cam peripheral surface of the cam body 14. The tip end 221 of the switching lever 22 is urged by a tension spring 25 in a direction toward the drive disk 20 side. The positioning lever 23 is biased by a tension spring 26 in a direction in which the rotor 231 abuts on the cam peripheral surface.

A transmission pin 2 is provided on the side surface of the switching lever 22.
22 is attached. The transmission pin 222 can contact the back of the positioning lever 23. When the transmission pin 222 is in contact with the back of the positioning lever 23, the spring force of the tension spring 25 acts on the positioning lever 23 via the transmission pin 222. This acting direction is the tension spring 26
Is the same direction as the action direction of.

A stopper 36 is provided immediately above the base end 223 of the switching lever 22. The stopper 36 regulates the lowermost moving position of the switching lever 22. A cam lever 27 is swingably supported on a support shaft 28 at the side of the switching lever 22. The cam lever 27 is biased by a tension spring 29 in a direction in which the rotor 271 contacts the cam surface of the cam 30. The cam lever 27 swings around the support shaft 28 as the cam 30 rotates. A control lever 31 is swingably supported by a support shaft 32, and an electromagnet 33 is attached to the side surface of the cam lever 27. When the electromagnet 33 is excited, the control lever 31 is attracted to the electromagnet 33. The control lever 31 is biased by a tension spring 34 in a direction away from the electromagnet 33. The control lever 31 has an electromagnet 33 with a stopper 35.
The position separated from is restricted. When the control lever 31 is in contact with the stopper 35, the swing locus of the tip of the control lever 31 accompanying the swing of the cam lever 27 is the switching lever 2
It intersects with the swing locus of the base end portion 223 of No. 2. Control lever 3
When 1 is attracted to the electromagnet 33, the cam lever 27
The swing locus of the tip end of the control lever 31 associated with the swing of is deviated from the swing locus of the base end portion 223 of the switching lever 22.

The drive shaft 11 and the cam 30 rotate in the direction of the arrow in FIG.
Rotate twice. In FIG. 1, the locking lever 15 has a locking protrusion 151.
Is in the coupling position where it is engaged with the engaging recess 201 of the drive disc 20. The rotor 231 of the positioning lever 23 has the holding recess 1
The electromagnet 33 is in a state immediately before it is fitted into the shaft 41, and the electromagnet 33 is in a demagnetized state. The rotor 271 of the cam lever 27 is in a state immediately before riding on the mountain portion 301 of the cam 30.
When the drive shaft 11 and the cam 30 rotate from the state of FIG. 1,
The cam body 14 and the drive shaft 11 rotate integrally, and the rotor 231 of the positioning lever 23 enters the holding recess 141 by the spring force of the tension spring 26 as shown in FIG.
At this time, the rotor 271 of the cam lever 27 rides on the mountain portion 301 of the cam 30, and the control lever 31 comes into contact with the base end portion 223 of the switching lever 22. Therefore, as shown in FIG. 3, the tip end 221 of the switching lever 22 is held at a position separated from the other end 152 of the lock lever 15,
The lock lever 15 is held at the coupling position where the lock protrusion 151 is fitted in the engagement recess 201.

When the drive shaft 11 rotates from the state shown in FIG. 3,
As shown in FIG. 4, the rotor 231 of the positioning lever 23 separates from the holding recess 141, and the rotor 2 of the cam lever 27 moves.
71 moves from the peak portion 301 of the cam 30 to the valley portion. At this time, the spring force of the tension spring 25 does not act on the positioning lever 23 via the transmission pin 222.

FIG. 5 shows a state in which the drive shaft 11 has rotated almost half a turn from the state of FIG. 4, and is in a state immediately before the rotor 231 of the positioning lever 23 enters the holding recess 142 of the cam body 14. Further, in FIG. 5, the electromagnet 33 is in an excited state, and the control lever 31 is attracted to the electromagnet 33. In the state immediately before the rotor 231 enters the holding recess 142 of the cam body 14, the spring force of the tension spring 26 causes the transmission pin 22 to move.
It acts on the positioning lever 23 via 2.

When the drive shaft 11 rotates from the state of FIG. 5,
As shown in FIG. 6, the rotor 231 of the positioning lever 23 holds the holding recess 1 by the spring force of the tension springs 25 and 26.
Enter 42. At this time, the rotor 27 of the cam lever 27
1 rides on the mountain portion 301 of the cam 30, and the control lever 31 moves downward from the state of FIG. However, since the control lever 31 is attracted to the electromagnet 33, the control lever 31
Does not contact the base end 223 of the switching lever 22. Therefore, the tip end portion 221 of the switching lever 22 and the rotor 231 strike the other end portion 161 of the auxiliary lever 16 by the spring force of the tension springs 25 and 26. as a result,
The lock projection 151 is disengaged from the engagement recess 201 against the spring force of the tension spring 19.

When the locking lever 15 is arranged at the disengagement position where the locking projection 151 is disengaged from the engaging recess 201, the drive shaft 11 can idle with respect to the eccentric wheel 12. FIG. 7 shows a state where the drive shaft 11 is slightly rotated from the state shown in FIG. The rotor 271 of the cam lever 27 is the mountain portion 3 of the cam 30.
The control lever 31 that has moved from 01 to the trough and is attracted to the electromagnet 33 moves upward from the state of FIG. 6. Therefore, when the electromagnet 33 is demagnetized in the state of FIG. 7, the control lever 31 moves to the position where it abuts on the stopper 35, and the control lever 31 and the base end 223 of the switching lever 22 can come into contact.

When the lock lever 15 is arranged to be switched from the coupling release position of FIG. 6 to the coupling position, before the drive shaft 11 makes a half rotation from the state of FIG. 6, that is, the rotor 271 of the cam lever 27 moves to the cam 30. The electromagnet 33 is demagnetized before riding on the mountain portion 301. After this demagnetization, the rotor 271 rides on the mountain portion 301, and the control lever 31 moves to the switching lever 2
The second base end portion 223 is pushed down, and the tip end portion 221 of the switching lever 22 is separated from the other end portion 161 of the auxiliary lever 16. Due to this separation, the locking protrusion 151 causes the tension spring 1 to move.
The spring force of 9 makes contact with the peripheral surface of the drive disk 20. Then, as the drive disc 20 rotates, the locking protrusion 151 slides on the peripheral surface of the drive disc 20 and fits into the engagement recesses 201 and 202.

When the lock lever 15 is held in the uncoupling position shown in FIG. 6 even after the drive shaft 11 has rotated half a turn from the state shown in FIG. 6, the excitation of the electromagnet 33 is maintained. When the swing lever 21 is in the swing position shown by the solid line in FIG. 3, the heald frame is in the upper opening position, and the first frame position indicator 38 faces the proximity switch 40.

When the swing lever 21 is in the swinging position shown by the chain line in FIG. 3, that is, when the heddle frame is in a predetermined swinging position to move from the lower opening position to the upper opening position, the second frame position indicator. 39 faces the proximity switch 40.

When the swing lever 21 is in the swing position shown in FIG. 6, the heald frame is in the lower opening position, and the proximity switch 4
0 faces a position below the second frame position indicator 39.
That is, neither the first frame position indicator 38 nor the second frame position indicator 39 faces the proximity switch 40.

When the swing lever 21 is in a predetermined swing position on the way from the swing position of FIG. 4 to the swing position of FIG. 5, that is, when the heald frame moves from the upper opening position to the lower opening position, When it is time, the proximity switch 4
0 is the first frame position indicator 38 and the second frame position indicator 39
Opposite the intermediate position between and. That is, the first frame position indicator 3
Neither 8 nor the second frame position indicator 39 faces the proximity switch 40.

As shown in FIG. 1, an arc-shaped rotation timing indicator 41 is fixedly attached to the drive shaft 11. Drive shaft 1
A pair of proximity switches 42 and 43 are arranged on the side of the rotation locus of the rotation timing indicator 41 accompanying the rotation of 1. The detection areas of the proximity switches 42 and 43 are set on the rotation locus of the rotation timing indicator 41. When the rotation timing indicator 41 faces the proximity switches 42 and 43, the proximity switches 42 and 43 output an ON signal to the loom control computer C.

The curves H in FIGS. 8A and 8B represent the opening pattern of the heald frame, and the waveform E represents the ON-OFF signal output from the proximity switch 40. Waveform T1 of FIG.
Is ON output from the proximity switch 42 when the loom is rotating forward, that is, when the drive shaft 11 is rotating in the direction of the arrow in FIG.
-Represents an OFF signal. The waveform T2 in FIG. 8B is ON when the loom is reversely rotated, that is, when the drive shaft 11 is rotating in the direction opposite to the arrow direction in FIG.
-Represents an OFF signal. A waveform D1 in FIG. 8A represents an excitation / demagnetization program of the electromagnet 33 during forward rotation of the loom.
A waveform D2 in (b) represents an excitation / demagnetization program of the electromagnet 33 when the loom is reversed. The excitation / demagnetization program represents a preset opening pattern of the heddle frame.

The loom control computer C obtains the loom rotation angle information from the rotary encoder 47 for detecting the loom rotation angle. When the loom is rotating in the normal direction, the loom control computer C sets the proximity switch 42 at the loom rotation angle θ = θ1.
In response to the ON signal output from the electromagnet 33, the electromagnet 33 is controlled to be demagnetized based on a preset demagnetization program.
When the loom is reversing, the loom control computer C
In response to the ON signal output from the proximity switch 43 at the loom rotation angle θ = θ2, the electromagnet 33 is demagnetized and demagnetized based on a preset demagnetizing program.

When the loom is rotating in the normal direction, the loom control computer C sets the proximity switch 4 at the loom rotation angle θ = θ1.
Searching for 0 ON signal. Θ shown in FIG.
In the angular position of = γ, the heald frame is in the lower opening position, and the proximity switch 40 does not output the ON signal. At this time, the swing lever 21 is in the solid line position in FIG. At the angle position of θ = δ, the heald frame is in the upper opening position, and the proximity switch 40
Outputs an ON signal. At this time, the swing lever 2
1 is at the solid line position in FIG. That is, when the heddle frame does not move from the upper opening position or the lower opening position, whether the heddle frame is in the upper opening position or the lower opening position can be specified by the presence or absence of the ON signal of the proximity switch 40.

As shown in FIG. 8A, according to the set opening pattern, the heddle frame is in the process of shifting from the upper opening position to the lower opening position when the loom rotation angle θ is θ1 = α. If the heddle frame is actually in the process of shifting from the upper opening position to the lower opening position, the proximity switch 40 does not output the ON signal at the angular position of θ1 = α. When the ON signal of the proximity switch 40 is not output at the angular position of θ1 = α, the loom control computer C determines that the opening position of the heddle frame is normal and continues weaving. If the heddle frame actually remains at the upper opening position, the proximity switch 40 outputs an ON signal at the angular position of θ1 = α. When the ON signal of the proximity switch 40 is output at the angular position of θ1 = α, the loom control computer C determines that the opening position of the heddle frame is abnormal and performs a process of stopping the operation of the loom drive motor M.

As shown in FIG. 8A, according to the set opening pattern, the heddle frame is in the process of transitioning from the lower opening position to the upper opening position at the angular position where the loom rotation angle θ is θ1 = β. If the heddle frame is actually in the process of shifting from the lower opening position to the upper opening position, the proximity switch 40 outputs the ON signal at the angular position of θ1 = β. When the ON signal of the proximity switch 40 is output at the angular position of θ1 = β, the loom control computer C determines that the opening position of the heddle frame is normal and continues weaving. If the heddle frame actually stays at the lower opening position, the proximity switch 40 moves at the angular position of θ1 = β.
Do not output N signal. When the ON signal of the proximity switch 40 is not output at the angle position of θ1 = β, the loom control computer C determines that the opening position of the heddle frame is abnormal and performs the process of stopping the operation of the loom drive motor M.

The loom is designed to stop at a predetermined rotation angle of one rotation of the loom. The loom rotates by one revolution due to inertia and stops. In the present embodiment, the loom rotation angle θ
The loom stop angle is near = θ1.

When the loom is rotating in the reverse direction, the loom control computer C searches for the ON signal of the proximity switch 40 at the loom rotation angle θ = θ2. The following effects are obtained in the first embodiment. (1-1) The proximity switch 40 serves as a single-body frame position indicator, and the first frame position indicator 38 and the second frame position indicator 39 serve as a plurality of frame position indicators. Proximity switch 40
And the first frame position indicator 38 is the first set, and the proximity switch 40 and the second frame position indicator 39 is the second set.
Will be a pair. The loom rotation angle θ = θ1 is a predetermined timing corresponding to the middle of the movement of the heddle frame from one of the upper opening position and the lower opening position to the other. Proximity switch 4 in the first set at loom rotation angle θ = θ1
In the first detection position state in which 0 detects the first frame position indicator 38 in the first set, the heald frame is in the upper opening position. In the second detection position state in which the proximity switch 40 in the second set detects the second frame position indicator 39 in the second set at the loom rotation angle θ = θ1, the heald frame moves upward from the lower opening position. Heading towards the opening position. In the third detection position state in which the detection area of the proximity switch 40 is between the first frame position indicator 38 and the second frame position indicator 39 at the loom rotation angle θ = θ1, the heald frame is in the upper position. From the opening position to the lower opening position. Loom rotation angle θ = θ1
In the fourth detection position state in which the detection area of the proximity switch 40 is below the second frame position indicator 39, the heald frame is in the lower opening position. That is, when the heddle frame is moving from one of the upper opening position and the lower opening position toward the other, the direction in which the heddle frame is directed can be specified. Therefore,
The discrepancy between the actual shed pattern and the set shed pattern can be detected during the movement of the heddle frame, and the loom can be stopped early.

For such an early stop of the loom, one proximity switch 40 and two frame position indicators 38 and 39 are used, and only two sets of frame position detecting means and frame position indicators are required. Four sets are required as a set of the frame position detection means and the frame position indicator, and four sensors are used.
Compared with the conventional device disclosed in the publication, the opening device of the present embodiment has a great cost advantage.

Next, a second embodiment shown in FIG. 9 will be described. The same components as those in the first embodiment are designated by the same reference numerals. In this embodiment, one frame position indicator 46 is attached to the base end portion 211 side of the swing lever 21, and the detection region is on the rotation locus of the frame position indicator 46 accompanying the swing of the swing lever 21. The first proximity switch 44 and the second proximity switch 45 having the above are used.

In the first detection position state of FIG.
The proximity switch 44 outputs an ON signal to the loom control computer (not shown), and the heddle frame is in the upper opening position. Figure 9
In the second detection position state of (d), the second proximity switch 4
5 outputs an ON signal to the loom control computer, and the heald frame moves from the lower opening position to the upper opening position. Figure 9
In the third detection position state of (b), the proximity switches 44, 4
None of the 5 outputs an ON signal, and the heald frame is moving from the upper opening position to the lower opening position. In the fourth detection position state of FIG. 9C, the proximity switches 44 and 45 are both ON.
It outputs no signal and the heddle frame is in the lower opening position.

The proximity switches 44 and 45 serve as a plurality of frame position detecting means, and the frame position indicator 46 serves as a single frame position indicator. The first proximity switch 44 is a first frame position detecting means, and the second proximity switch 45 is a second frame position detecting means. The set of the first proximity switch 44 and the frame position indicator 46 becomes the first set, and the second proximity switch 4
The set of 5 and the frame position indicator 46 is the second set.

Also in this embodiment, the same effect as in the first embodiment can be obtained. The following embodiments are possible in the present invention. (1) The proximity switch 40 outputs an ON signal when the heald frame is moving from the upper opening position to the lower opening position, and the proximity switch 40 outputs an ON signal when the heald frame is moving from the lower opening position to the upper opening position. Do not output. In this case, the proximity switch 40 outputs an ON signal when the heald frame is in the lower opening position, and the proximity switch 40 does not output an ON signal when the heald frame is in the upper opening position. (2) Two frame position indicators are arranged on either one of the fixed portion and the heald frame in the vicinity of the movement path of the heddle frame, and one frame position detecting means is arranged on the other.

[0044]

As described above in detail, in the present invention, a combination of one frame position detecting means and two frame position indicators,
Alternatively, by combining two frame position detecting means and one frame position indicator, the direction in which the heddle frame is heading can be specified during movement, so that the height position of the heddle frame can be predicted early at low cost. The excellent effect of obtaining is obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment embodying the present invention.

FIG. 2 is an exploded perspective view of a drive shaft, an eccentric wheel, a drive disk, a connecting wheel, a locking lever, an auxiliary lever, a switching lever and a positioning lever.

FIG. 3 is a front view showing a state in which the rotor of the positioning lever has entered the holding recess and the heald frame is in the upper opening position.

FIG. 4 is a partially cutaway front view showing a state in which a rotor of a positioning lever is separated from a holding recess.

FIG. 5 is a partially cutaway front view showing a state immediately before the rotor of the positioning lever is fitted into the holding recess.

FIG. 6 is a front view showing a state in which the locking lever is arranged at the coupling release position and the heald frame is at the lower opening position.

FIG. 7 is a front view showing a state in which the drive shaft is idling with respect to the eccentric wheel.

FIG. 8 (a) is a timing chart at the time of forward rotation of the loom,
(B) is a timing chart when the loom is reversed.

9 (a), (b), (c) and (d) are all enlarged front views showing the second embodiment.

[Explanation of Codes] 11 ... Drive shaft, 12 ... Eccentric wheel, 13 ... Connecting wheel, 15 ... Locking lever that serves as a locking body, 38 ... First frame position indicator, 3
9 ... 2nd frame position indicator, 40 ... Proximity switch used as frame position detection means, 44 ... 1st frame position detection means
Proximity switch, 45 ... Second proximity switch serving as second frame position detecting means, 46 ... Frame position indicator.

Continuation of the front page (56) Reference JP-A-9-217243 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D03C 1/00

Claims (3)

(57) [Claims] Claim: What is claimed is: 1. An eccentric wheel fitted to a drive shaft such that the eccentric wheel and the drive shaft rotate integrally with each other, and a release position where the drive shaft rotates relative to the eccentric wheel. In an opening device in which stop bodies are arranged in a switching manner, and a connecting ring that is relatively rotatably fitted to the eccentric wheel is connected to a drive force transmission system for moving the heddle frame up and down, interlocking with movement of the heddle frame. And a frame position indicator for indicating the height position of the heddle frame, and a frame position detector for detecting the moving position of the frame position indicator at a predetermined position, and the frame position indicator and the frame position detector. One of the two is set as one and the other is set as two, and a set of a single body and one of a plurality of the frame position indicator and the frame position detection means is set as a first set. In the detection area of the frame position detection means in the first set, the first set The first detected position state when there is a frame position indicator in the heald frame corresponds to one of the upper opening position and the lower opening position of the heddle frame, and the other of the plurality of bodies and the single body form a second set. And the second detection position state when the frame position indicator in the second set is in the detection area of the frame position detection means in the second set, the upper opening position and the lower opening position of the heddle frame. The third detection position state intermediate between the detection position state in the first set and the detection position state in the second set is made to correspond to the position in the middle of movement from the other side to the one side, and the heald frame is Of the upper opening position and the lower opening position in the middle of movement from the one to the other, the frame position indicator is not in the detection area of the frame position detecting means, and the heddle frame is the upper opening position and From the one of the lower opening position to the other A fourth detection position state that goes through the first detection position state and the third detection position state with movement is made to correspond to the other of the upper opening position and the lower opening position, and the first detection position state A shedding device for a loom in which the detection timings in the position state, the second detection position state, the third detection position state, and the fourth detection position state are all the same predetermined timing. 2. The number of the frame position indicators is two, the number of the frame position detecting means is one, and the set of the first frame position indicator and the frame position detecting means is a first set, The first detection position state when the first frame position indicator is in the detection area of the frame position detection means in the first set is made to correspond to one of the upper opening position and the lower opening position of the heddle frame. When a set of a second frame position indicator and the frame position detecting means is a second set, and the second frame position indicator is in the detection area of the frame position detecting means in the second set. The second detection position state of the heddle frame corresponding to a position in the middle of moving from the other of the upper opening position and the lower opening position of the heddle frame to the first frame position indicator and the second frame position indicator. The third detection position state when the detection area of the frame position detection means is between the upper opening position of the heddle frame. And the lower opening position corresponding to the position in the middle of movement from the one to the other, the frame position indicator is not in the detection area of the frame position detecting means, and the heddle frame is the upper opening position and the lower opening position. The fourth detection position state, which goes through the first detection position state and the third detection position state as it moves from the one side to the other side, is made to correspond to the other of the upper opening position and the lower opening position. , The first
2. The shedding device for the loom according to claim 1, wherein the detection timings in the second detection position state, the second detection position state, the third detection position state, and the fourth detection position state are the same predetermined timing. 3. The number of the frame position indicator is one, the number of the frame position detecting means is two, and the set of the frame position indicator and the first frame position detecting means is a first set, The first detection position state when the frame position indicator is in the detection area of the first frame position detection means in the first set is made to correspond to one of the upper opening position and the lower opening position of the heddle frame. When a set of the frame position indicator and the second frame position detecting means is a second set, and the frame position indicator is in the detection area of the second frame position detecting means in the second set. The second detection position state of the heddle frame corresponding to a position on the way of moving from the other of the upper opening position and the lower opening position of the heddle frame to the detection area of the first frame position detecting means and the second frame position. The third detection position state when the frame position indicator is between the detection area of the detection means and the heddle Corresponding to the position of the upper opening position and the lower opening position on the way from the one to the other, the frame position indicator is not in the detection area of the frame position detecting means, and the heddle frame is the upper opening position and A fourth detection position state that goes through the first detection position state and the third detection position state along with the movement from the one of the lower opening positions to the other is the upper opening position and the lower opening position. Corresponding to the other, the first detection position state, the second detection position state,
The shedding device for the loom according to claim 1, wherein the detection timings in the third detection position state and the fourth detection position state are the same predetermined timing.