JPH03161551A - Cleaning of rapier - Google Patents

Abstract

PURPOSE:To secure a sufficient cleaning time and enable sure cleaning of a rapier by controlling the opening of the tip end of a yarn-catcher of a repair with an opener and the cleaning operation of a weft-holding part with an air nozzle in relation to the stop/start motion of a loom. CONSTITUTION:When a rapier loom is braked and stopped, a lever 42 of an opener 4 is turned by the action of a driving means 5 to the position shown by a dotted line at the rear end of a yarn catcher 24 of a rapier 2. A roller 41 rotatably supported with a pin 43 at the tip of said lever 42 is made to contact with the catcher to open the weft-holding part at the tip end of said yarn catcher 24. Fly waste, waste yarn, dust, etc., attached to the weft-holding part is sucked or blown off with air stream from a waste yarn removing means 6 composed of an air source 63, a filter 62 and an air nozzle 61 to clean the weft-holding part. A series of the above opener operation and cleaning operation is controlled over a prescribed period in relation to the stop/start operation of the loom.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for cleaning the weft thread gripping portion of a rapier in a rapier loom. [Prior Art] Japanese Utility Model Application Publication No. 63-78080 discloses that during weaving, a yarn canch of a rapier is intermittently opened by an opener, and yarn waste from a weft thread gripping portion is removed by a thread waste removing means. ing. (Problems with the Prior Art) However, in the above device, in order to operate the lint removal means intermittently, y! This requires a complicated control circuit, and since the opener is operated while the rapier loom is running, there is not enough time to clean the weft gripping area.
It is not possible to remove thread waste reliably. OBJECT OF THE INVENTION It is therefore an object of the invention to ensure that the weft thread gripping part of a rapier is cleaned by means of simple control means.

[Means for solving the invention]

Therefore, the present invention adopts the same structure as the conventional example as a mechanical component, and controls the opener and thread waste removal means in a predetermined manner in relation to the stop/start operation of the rapier loom. I'm trying to run it only for hours.

[Action of the invention]

In connection with the stop/start operation of the rapier m machine, the control section operates the opener and the thread waste removing means for a predetermined time to cause the thread waste removing means to act on the weft thread gripping part of the rapier, and Remove thread waste, etc. Here, the predetermined period is the stop period of the rapier loom, which is a predetermined period of time after the loom stop signal is input manually while the loom stop signal is input manually, and a predetermined period of time after the loom stop signal is input manually. It is determined by the angular period, or by a predetermined time, a predetermined cycle period, a predetermined angle period, and a predetermined cycle period after starting the rapier loom and from the point of disappearance of the m loom stop signal. Therefore, rapier cleaning is performed at least in conjunction with the stopping and starting operations of the rapier loom. Therefore, at least one of the opener and the thread M removing means can be stopped during a period other than the above-mentioned predetermined period, and in particular, only for a predetermined period in relation to the generation or extinction of the loom stop signal. Since the cleaning operation is performed, a special circuit like the conventional technology is not required, and the control circuit can be simplified. Also,! If the cleaning operation is performed during the t1ii stop, sufficient time can be secured for cleaning, and thread waste can be reliably removed.

[Structure and functions of rapier cleaning device]

FIG. 1 shows a rapier cleaning device 1. FIG.

This rapier cleaning device 1 comprises an opener 4, its drive means 5 and lint removal means 6 near the retracted position of the passage path 3 of the rapier 2.

The above rapier 2 is of the type 1C, and is a rapier band 2.
A yarn catch 24 is held by a horizontal yarn catch pin 23 on the upper surface of a rapier base 22 fixed to the tip of the yarn catch 24 in a state where it can swing in a reciprocating direction. This yarn cassocket 24 has a compression spring 26 at the tail end.
The gripping portion at the tip holds the weft thread 7 in a pinched state. The opener 4 is comprised of a rotatable lever 42 and a roller 41 rotatably supported by a pin 43 at the tip thereof. The lever 42 is rotatably supported on a frame 44 by a shaft 45, and is connected to a drive means 5 fixed to the frame 44, such as a self-resetting rotary solenoid. Note that one end of the rotation angle of the lever 42 is regulated by a stopper 46 fixed to the frame 44. Further, the lint removing means 6 may be fixed with a brush or the like.
As a preferable example, a suction type or injection type air nozzle 6 is used.
It is composed of engineers. This air nozzle 61 is connected via a filter 62 to an air flow generator 3 such as an electric vacuum pump or an electric compression pump.

When the drive means 5 is operated and the lever 42 is rotated to the position shown by the imaginary line, when the rapier 2 retreats to that position, the tail end of the yarn catch 24 is moved against the roller 41.
When it hits, the tip part will be open. At this time, the air nozzle 61 cleans by suctioning or blowing away fluff, thread waste, dirt, etc. adhering to the weft thread gripping portion at the tip of the yarn canch 24 using the air flow. Therefore, it is sufficient that the lint removing means 6 is operated at least during the cleaning operation. In this way, the drive means 5 and the lint removal means 6 of the opener 4 are driven in correspondence with the cleaning operation. Based on the present invention, these cleaning operations are performed by the control unit 8 for a predetermined period in association with the stop/start operations of the rapier loom. This control unit 8 can be embodied by each embodiment shown below. In each of the following embodiments, the same parts are given the same reference numerals, and the same explanations are omitted for the parts that have already been explained.

[Example 1 (Figures 2 and 3)] In this example,
This is an example in which cleaning is performed using the stop period of the rapier loom as a predetermined period.

When operation switch PBR is pressed, relay R is connected to source E, so relay contact Ra is turned on, a self-holding circuit is activated, and the rapier loom is set to the operating state. During this operation, if a cause of stoppage occurs such as horizontal stop or vertical stop, or if stop switch PBS in the self-holding circuit is set to OFF state, relay R will be OFF state. The relay contact Rh returns to the on state, the relay S is energized, and the two relay contacts Sa are set to the on state. As a result, the driving means 5 and the thread waste removing means 6 are connected to the power source W and continue to operate during the stop period.

In this way, during the braking operation from when the rapier loom starts to stop until it comes to a complete stop, the rear end portion of the yarn catch 24 of the rapier 2 comes into contact with the opener 4 in the operating state, and the tip of the yarn catch 24 is in the open state, and its gripped portion is cleaned by the air nozzle 6l. Here, either the drive means 5 or the thread waste removal means 6 may be set to be in constant operation.

In this embodiment, when the rapier loom is completely stopped, the position of the rapier 2 is uncertain. For this reason, it is conceivable that the gripping portion of the rapier 2 is not cleaned in the stopped state.

[Embodiment 2 (Figures 4 and 5)] This embodiment is a modification of Embodiment 1, in which a timer relay T is added and the operation period of the relay S is set to a predetermined set time after the rapier loom stops. This is an example using only TO. That is, in the first embodiment, since the rapier loom is braking during the cleaning period, the drive stage 5 and the thread waste removal stage 6 do not need to be operating during the other periods. Therefore, the timer relay T is set for a set time T after the rapier loom starts to stop.
After O, the subsequent cleaning operation is stopped by opening the relay contact Tb and turning off the relay S. Therefore, the cleaning operation is performed only during the predetermined time TO, and no operation is performed during the subsequent stop period, thereby reducing electricity costs.

[Embodiment 3 (Figs. 6 and 7)] This embodiment is an improvement on Embodiment 1, and a contact SW1a of the proximity switch SWI is added to the circuit of the relay S, so that the operation of the relay S is changed. This is an example in which the period is limited to a predetermined angle period after the loom stops.

During the stopping process of the rapier loom, the proximity switch SWI is connected to the main shaft MS driven by the main motor MM for driving the loom.
By detecting the position of the cam CI, the angular period during which the rapier 2 and opener 4 face each other is detected. This angular period is set including the angle at which the rapier 2 faces the opener 4, taking into consideration the operation response time of the drive stage 5 and the thread waste removal stage 6. Therefore, the driving means 5 and the lint removing means 6 start operating when the rapier 2 corresponds to the opener 4, and reliably perform the cleaning operation.

In order to detect the predetermined angular period of the spindle MS of the m machine, an encoder that detects the rotation angle of the spindle MS, a setting device that sets the predetermined angular period, and a rotation angle of the spindle MS are used instead of the proximity switch SWI. Compare with the setting angle period,
It is also possible to use a comparator that outputs a signal when there is a loss. (Embodiment 4 (FIGS. 8 and 9)) This embodiment is an example in which the position of the rapier 2 is controlled to ensure that the rapier 2 faces the opener 4 during the stopping process of the rapier loom. That is, After the rapier loom has completely stopped,
The control unit 8 automatically rotates the main shaft MS in the normal direction and stops the rapier 2 at a predetermined position facing the opener 4. At this time, since the drive means 5 and the thread waste removing means 6 are already in operation, the weft thread gripping section of the rapier 2 is continuously cleaned from this point on. According to this embodiment, sufficient time required for the cleaning operation can be secured while the loom is stopped, so thread waste can be reliably removed.

When relay R is set to OFF state to stop the rapier loom, along with relay S, timer relay TAS
TB works at the same time. The timer relay TA operates after a predetermined time T1 from the time when the relay R is turned off, in order to secure enough time for the loom to completely stop after the loom stop signal is manually applied. Contact point TAa
Close. Further, in order to generate a pulsed automatic normal rotation command signal, the timer relay TB sets the relay contact TBb to the OFF state after a time T2 that is slightly longer than the set time T1. Therefore, the relay RS operates only during the period from when the timer relay TA operates until the timer relay TB operates.The contact RSa of the relay RS is as follows.
In order to operate the forward rotation relay RF, this forward rotation relay RF
closes the contact RFa and holds it self, closes the contact RFal on the output side of the inverter INV connected to the commercial power supply EM, and opens the contact RFbl. Therefore, the main motor MM starts rotating in the normal rotation direction at low speed by the inverter INV. During this forward rotation, the proximity switch S
W2 detects a predetermined position of the main shaft MS, that is, the opposing position of the rapier 2 and opener 4 from the cam C2, and generates a signal. This signal turns off the contact 3w2b and releases the self-holding of the forward rotation relay RF, so the rapier loom stops when the self-holding is released.

In order to detect the predetermined position of the spindle MS of the II machine, in place of the proximity switch SW2, an encoder that detects the rotation angle of the spindle MS, a setting device that sets the predetermined angle, and a rotation angle and setting of the spindle are used. It may also consist of a comparator that compares the angle and outputs a signal when they match. Although the above operation is for automatic forward rotation, this forward rotation operation can also be set by the operator by pressing the forward rotation switch PBF after the loom has stopped. According to this circuit, even during manual operation, the loom will automatically stop at a preset angle. (Embodiment 5 (Figures 10 and 11)) This embodiment is an example in which the cleaning operation is continued for a predetermined period of time immediately after the rapier loom is started, that is, at the beginning of the operation of the loom. In order to operate the VA machine, the operation signal changes from the “L” level @
At the time when the timer T rises to the "H" level, the timer T generates an output of the "H" level for a preset time T3, drives the driver D, and the relay S causes the driving means 5 to output.
and operate the lint removal means 6. As a result, the rapier cleaning device 1 continues the cleaning operation for a preset time T3 after the start of operation of the rapier loom, continues the cleaning operation at the backward position due to the reciprocating movement of the rapier 2, and then interrupts the cleaning operation. It turns out.

[Embodiment 6 (FIGS. 12 and 13)] This embodiment is an example in which the gripping portion of the rapier 2 is cleaned for a predetermined cycle after startup. That is, the ring counter RC receives the operation signal and resets the count value. After that, the timing signals, such as the O0 signals, of the m aircraft are counted, and a predetermined number, such as "
When it counts 3, it outputs a signal. Therefore, the flip-flop FF operates the relay S over a period from when the operation signal is input to when the signal from the ring counter RC is input. Therefore, the gripping portion of the rapier 2 will be cleaned during this period.

The ring counter RC outputs a signal at a predetermined period during the subsequent operation of the rapier m machine, but at this time, the flipflop FF is already set to the off state, so there is no problem in operation. do not have. [Example 7 (Figure 14)
] This embodiment is an example in which the grip portion of the rapier 2 is cleaned from each predetermined cycle period at a predetermined angle period after the start of ¥am. For this reason, an AND gate A is interposed between the flip-flop FF and the driver D, and one input terminal of the AND gate A is
It is connected to the proximity switch SWI of FIG. 6 of the embodiment. Therefore, only for a given cycle period,
Rapier 2 will be cleaned. [Effects of the Invention] In the present invention, since the operating state is controlled in relation to the stop/start signal of the loom, the structure of the control section can be simplified. The frequency of occurrence of the phenomenon of stopping/starting the rapier loom is, for example, about once every several tens of minutes. The present invention utilizes this phenomenon to operate both the opener and the thread waste removal means for a predetermined period of time to clean the weft thread gripping part of the rapier. At least one of the means can be stopped. Therefore, the life of the lint removal means such as a brush or the yarn catcher related members of the rapier is extended. In addition, when using airflow as a means of removing lint,
Less fluid consumption is required. In particular, since the stop/operation signal of the loom is only used to intermittently operate at least one of the lint removal means and the opener, it is time to start the intermittent operation as in the prior art. No special circuit such as a timer or counter is required to determine the value, and the circuit structure can be simplified accordingly. Furthermore, as in the first embodiment, if the stop/operation signal of the loom is used as is, there is no need for a special circuit such as a timer or counter to determine when to stop the intermittent operation. The circuit structure can be further simplified.

Furthermore, if the position of the rapier is controlled so that it faces the opener while the loom is stopped, sufficient time for the cleaning operation can be secured, and thread waste can be removed reliably.

[Brief explanation of the drawing]

Figure 1 is a side view of the mechanical structure of the rapier cleaning device, Figure 2 is a side view of the mechanical structure of the rapier cleaning device;
3 is a circuit diagram of the control section of the first embodiment, FIG. 3 is a time chart thereof, FIG. 4 is a circuit diagram of the control section of the second embodiment, FIG. 5 is a time chart of the second embodiment, and FIG. 6 is a circuit diagram of the control section of the first embodiment. is a circuit diagram of the third embodiment, FIG. 7 is a time chart diagram of the third embodiment, FIG. 8 is a circuit diagram of the control section of the fourth embodiment, FIG. 9 is a time chart diagram of the fourth embodiment, and FIG. 11 is a circuit diagram of the control section of the fifth embodiment, FIG. 11 is a time chart diagram of the fifth embodiment, FIG. 12 is a circuit diagram of the control section of the sixth embodiment, FIG. 13 is a time chart diagram of the sixth embodiment, and FIG. The figure is a circuit diagram of Example 7. 1. Rapier cleaning device, 2. Rapier, 3. Passage path, 4. Opener, 5. Drive means, 6. Thread waste removal means, 7. Weft thread, 8. Control unit. Patent Applicant Tsudakoma Kogyo Co., Ltd. Agent Patent Attorney Kunio Nakagawa 7 Figure 2 Figure 1 + II [8 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Proximity switch SWI Relay S Figure 8 9 Figure 70 Figure 77 Figure 72

Claims (2)

[Claims] (1) An opener that can be displaced from a retracted position to a position that corresponds to the tail end of the yarn catch of the rapier in the passage path of the rapier of a rapier loom, a drive means that displaces the opener between the two positions, and a drive means that moves the tip of the yarn catch. A rapier cleaning method comprising a rapier cleaning device comprising a lint removing means for cleaning, characterized in that the opener and the lint removing means are operated for a predetermined period in association with the stop/start operation of a rapier loom. (2) A rapier cleaning device comprising an opener fixedly provided at a position corresponding to the tail end of the yarn catch of the rapier in the passage path of the rapier of a rapier loom, and a thread waste removing means for cleaning the tip of the yarn catch. A method for cleaning a rapier, characterized in that the lint removing means is operated for a predetermined period in conjunction with the stop/start operation of the rapier loom.