The present invention relates to a method and a system for managing consumable parts in textile machinery such as looms, spinning machines and the like.
In the textile machinery typified by the weaving machine or loom such as a jet loom, there are employed a great number of consumable parts. As typical ones of such consumable parts, there may be mentioned a brake mechanism for a loom driving motor, ropes for driving heald frames constituting a shedding apparatus, supporting shafts for cam levers constituting a cam mechanism, felt layers secured around a peripheral surface of a press roller adapted to be pressed against a surface roller for taking up a woven fabric, cutters for cutting off a weft yarn or selvage for trimming, components of an on/off valve device for controlling air supply for effectuating weft yarn insertion and so forth. On the other hand, in the case of the spinning machines typifying the textile machine, there are employed, such consumable parts as mentioned below. In the fly frame, for example, there may be mentioned mounting pins for a presser of a flyer, while in the spinning frame, rings, travellers and the like may be mentioned as the typical consumable parts. Additionally, in a draft motion employed in the drawing frame, fly frame or the spinning frame, such parts as top rollers, apron and the like represent the consumable parts. Besides, in the open-end spinning machine, combing rollers and driving belts may be mentioned as the typical consumable parts. In a card or carding engine, card clothing and the like represent consumable parts. Needless to say, these consumable parts have to be exchanged or replaced at proper time points. In the present state of the art, the consumable parts are managed by an operator on the basis of information written in a so-called management notebook for replacement of the consumable parts upon lapse of operation or use periods determined previously for every type of the consumable parts, respectively. Alternatively, exchange of the consumable part is performed upon occurrence of abnormality. However, exchange of the consumable part upon detection of abnormality is not preferred because such abnormality may have exerted adverse influence to a textile product already manufactured at the time point of the abnormality detection. On the other hand, management based on the management book is a very troublesome procedure. Besides, there may arise such case that the consumable part is exchanged too early, i.e., before the useful or serviceable life thereof has not been exhausted or consumed, or the consumable part is exchanged after abnormality has taken place in that consumable part without being attended.
In Japanese U. M. Registration Application Publication No. 92585/1992, there is disclosed a system for displaying information concerning temporal spans during which consumable parts have been installed as well as information concerning inspections. On the basis of such displayed information, operator or worker can speedily perform exchange of the consumable parts or maintenance and inspection procedures therefor.
However, in the system described in the publication mentioned above, the temporal span as displayed is given simply in terms of a number of years lapsed from installation of a consumable part of concern in a weaving machine irrespective of whether or not the weaving machine has actually been put into operation during the period as displayed. Thus, in an extreme case, a consumable part employed in a loom may be replaced without being used for operation of the loom. At any rate, with the display of such time lapse information as disclosed in the above-cited publication, it is impossible to determine correctly the residual serviceable or useful life of the consumable part, rendering thus it impossible to carry out the exchange of the consumable part at a proper time point.
Document WO 92/21804 discloses a method and apparatus for monitoring and possibly replacing travellers on rings of a ring-spinning machine. The presence of travellers is monitored over a given number of spinning points. The presence or absence of a traveller on a ring is detected by means of a sensor. If a predetermined traveller failure rate is exceeded, a signal is generated for indicating the necessity of replacement of travellers.
In the light of the state of the art described above, it is an object of the present invention to provide a consumable part managing method which makes it possible to determine easily a proper time point at which a consumable part in a textile machine is to be replaced.
Another object of the present invention is to provide a system for carrying out the method motioned above.
In view of the above and other objects which will become apparent as the description proceeds, there is provided according to a general aspect of the present invention a consumable part managing system according to claim 1.
With the arrangement of the consumable part managing system, the consumed lifetime arithmetic means arithmetically determines or calculates the consumed lifetime of a consumable part on the basis of the serviceable life affecting factor detected by the factor detecting means. When the consumed lifetime determined arithmetically has reached the preset lifetime value, the message generating means issues information messaging need for replacement of the consumable part of concern. With the aid of such information, it is possible to determine or decide a proper time point for replacement of the consumable part.
In a preferred mode, the consumable part managing system may further include a modifying means for modifying an arithmetic expression for arithmetically determining the consumed lifetime by the consumed lifetime arithmetic means. Thus, unless the consumed lifetime calculated in accordance with the arithmetic expression as defined reflects correctly the actually consumed lifetime, it is possible to alter or correct the expression properly by the modifying means.
In another preferred mode, the consumable part managing system can further include an exchange decision means for deciding whether the consumed lifetime determined arithmetically by the consumed lifetime arithmetic means has reached a preset lifetime value, to thereby output a corresponding indication signal to the message generating means. With this arrangement, when the consumed lifetime of a consumable part has reached the preset lifetime, the exchange decision means outputs a corresponding signal indicating this fact to the message generating means. Upon reception of this signal, the message generating means gives information messaging necessity for replacement of the consumable part of concern on the basis of the message signal as inputted. With the aid of such information, it is possible to determine a proper time point for replacement of the consumable part.
In yet another preferred mode, the factor detecting means may include operation time detecting means for detecting a time duration for which the textile machine has been put into operation. By virtue of this arrangement, the consumed lifetime of a consumable part which is affected by the operation time of a textile machine in which the consumable part is installed or mounted can be arithmetically determined on the cumulation or integration value of the operation time of that textile machine. As a typical one of this sort of consumable part, there may be mentioned such a part of the textile machine, which is always put into operation whenever the textile machine is operated.
In still another preferred mode, the factor detecting means may be provided for each of plural textile machines, wherein the consumed lifetime arithmetic means may be provided in common for determining the consumed lifetimes of consumable parts in the plural textile machines, respectively, on the basis of information obtained from the factor detecting means, respectively. With the arrangement mentioned above, the consumed lifetimes of the consumable parts employed in a plurality of textile machines can be arithmetically determined by the single consumed lifetime arithmetic means provided in common to a plurality of textile machines. Thus, the management system implemented in the arrangement mentioned above can be applied to a system for monitoring or managing a plurality of textile machines with the aid of a single central computer.
In a preferred mode, the textile machine may be constituted by at least one Jet loom. In that case, the consumable part may be at least one selected from a group consisting of a brake mechanism provided in association with a loom driving motor, ropes for driving a plurality of heald frames constituting a shedding apparatus, supporting shafts for cam levers constituting a cam mechanism for driving the shedding apparatus, an anti-slip felt member provided around a circumferential surface of a press roller adapted to be pressed against a surface roller for pulling a woven fabric, a cutter for cutting off a weft and on/ off valves for controlling supply of compressed fluid to weft inserting nozzles in the jet loom.
In yet further preferred mode, the consumable part managing system may further include a preset lifetime storing means for storing preset lifetimes of the consumable parts, and a means for inputting the preset lifetimes to the preset lifetime storing means.
In still further preferred mode, the factor detecting means may be implemented as a functional part of a loom control computer. The consumed lifetime arithmetic means may then include a time integrating means composed of a timer for counting cumulatively the operation time of the jet loom in response to a time integrating command issued from the loom control computer when the jet loom is in an operation state. The time integrating means may be so adapted as to store latest integrated times as the serviceable life affecting factor for each of the consumable parts.
Further, the exchange decision means may preferably be so implemented as to compare the preset lifetime stored in the preset lifetime storage means with the consumed lifetime cumulated or integrated by the time integrating means for at least one of the consumable parts. When the consumed lifetime of the consumable part has reached a corresponding preset lifetime, a signal indicating necessity of exchange of the consumable part may be issued to the message generating means.
Furthermore, the message generating means may include a display means and a display control means connected to the display means. In that case, the exchange decision means may be adapted to output to the display control means a display command signal containing an index indicating the consumable part for which the comparison has been performed. The display control means may then be so implemented as to read the preset lifetime of the consumable part identified by the index contained in the display command signal from the preset lifetime storing means, while reading out the consumed lifetime of the consumable part issued from the time integrating means, for thereby commanding the display means to display an identifier of the consumable part together with the preset lifetime and the consumed lifetime.
Additionally, the factor detecting means may include an environment sensing means for detecting an environmental factor acting as the serviceable life affecting factor onto the jet loom.
Besides, the environment sensing means may be so implemented as to include at least one of sensors selected from a group consisting of a temperature sensor, a humidity sensor, a load current sensor, a power consumption sensor, a fluid consumption sensor, an acceleration sensor, a load torque sensor and a displacement sensor.
According to another aspect of the present invention, there is provided a method of managing at least one consumable part in a textile machine according to claim 13.
The above and other objects, features and attendant advantages of the present invention will more easily be understood by reading the following description of the preferred embodiments thereof taken, only by way of example, in conjunction with the accompanying drawings.
In the course of the description which follows, reference is made to the drawings, in which:
Now, the present invention will be described in detail in conjunction with what is presently considered as preferred embodiments thereof by reference to the drawings. In the following description, like reference characters designate like or corresponding parts throughout the several views.
A first embodiment of the present invention applied to a jet loom will be described by reference to Figs. 1 to 4.
Figure 1 is a schematic side view showing generally a structure of a jet loom together with a control circuit configuration. Referring to the figure, reference character M denotes a loom driving motor, whose operation is under the control of a loom control computer C1. A feed motor 11 constituted by a reversible electric motor is provided separately or independent of the loom driving motor M to serve for driving a warp yarn beam 12. Warp yarns T fed out from the warp yarn beam 12 are caused to pass through a heald 15 and a modified reed 16 under the guidance of a back roller assembly 13 and a tension roller assembly 14. A woven fabric W is wound up by a cloth roller 21 after having undergone operations exerted by an expansion bar 17, a surface roller 18 operatively coupled to the loom driving motor M, a press roller 19 and a crease eliminating guide member 20.
The tension roller 14 is mounted on a tension lever 22 at one end thereof, while a tension spring 23 is mounted at the other end of the tension lever 22, whereby a predetermined tension is constantly applied to the warp yarns T. The tension lever 22 in turn is rotatably supported by a detecting lever 24 at one end thereof, while a load cell 25 is coupled to the other end portion of the detecting lever 24. The tension applied to the warp yarnss is sensed by the load cell 25 by way of the tension roller 14, the tension lever 22 and the detecting lever 24. An electric signal indicative of the warp yarn tension is inputted through the load cell 25 to be thereby supplied the loom control computer C1.
The loom control computer C1 controls the rotation speed of the feed motor 11 on the basis of the result of comparison of the preset tension with the detected tension indicated by the output signal of the load cell 25 and the information concerning the diameter of the warp beam indicated by an output signal of a rotary encoder 26 provided for detecting a rotational angle or angular position of the jet loom. Through the rotation speed control mentioned above, the warp yarn tension is controlled in a normal operation of the jet loom.
The loom control computer C1 responds to an ON signal generated by a starting switch 27 to thereby issue a command for the forward rotation of the feed motor 11 as detected. A rotary encoder 111 issues a rotation speed detection signal indicative of the rotation speed of the feed motor 11. Thus, the loom control computer C1 can control the rotation speed of the feed motor 11 on the basis of the rotation speed detection signal fed back from the rotary encoder 111.
A weft yarn is inserted into a shed formed by the warp yarns under injection by a weft yarn inserting main nozzle 28. The weft yarn inserted into the shed is caused to run through the shed under relaying action of the jets produced by a plurality of weft yarn inserting auxiliary nozzles 29. The weft yarn ejected from the weft inserting main nozzle 28 is cut off from the weft yarn inserting main nozzle 28 by means of a cutter 30 immediately after beating by the reed.
A consumable part managing system C2 is electrically connected to the loom control computer C1. In this conjunction, it is to be noted that a backup power supply source E is provided for both the loom control computer C1 and the consumable part managing system C2 with a view to preventing information as stored from erasure upon occurrence of service interruption.
Figure 3 shows an internal arrangement or configuration of the consumable part managing system C2. As can be seen in the figure, the consumable part managing system C2 includes a preset lifetime storage unit 31 for storing preset lifetimes usable durations of a brake mechanism provided in association with the loom driving motor M, ropes for driving a heald frame constituting a part of the shedding apparatus, supporting shafts for cam levers constituting a cam mechanism for driving the shedding apparatus, an anti-slip felt member provided around and over a circumferential surface of the press roller 19 pressed against the surface roller 18 for taking up the woven fabric W, the cutter 30, on/off valves for controlling supply of compressed air to the weft inserting main nozzle 28 and the weft inserting auxiliary nozzle 29. These preset lifetime values or data can be stored in the preset lifetime storage unit 31 through input operation or manipulation of an input unit 32.
Further, the consumable part managing system C2 includes an operation time integrating circuit 33 which constitutes a consumed lifetime arithmetic means for determining accumulatively the time or period during which the jet loom has been operated. So long as the jet loom is in the operating state, the loom control computer C1 issues a signal commanding the time integrating operation to the operation time integrating circuit 33. A timer 34 is connected to the operation time integrating circuit 33 so that the operation time integrating circuit 33 can determine cumulatively the time lapse on the basis of the output signal of the timer 34 so long as the time integrating command signal is issued by the loom control computer C1. In this conjunction, it should be mentioned that the time integrating operation mentioned above is performed for each of the consumable parts or elements. Thus, the operation time integrating circuit 33 stores the integrated times updated most recently for every consumable parts. The integrated time for each of the consumable parts represents a factor affecting or influencing the serviceable lifetime of the relevant consumable part and may be regarded as the consumed lifetime of the relevant consumable part. Parenthetically, it is to be mentioned that the loom control computer C1 and the timer 34 cooperate to constitute an operation time detecting means which is one of the lifetime affecting factor detecting means.
Furthermore, the consumable part managing system C2 includes an exchange decision circuit 35 constituting an exchange decision means for comparing the preset lifetimes stored in the preset lifetime storage unit 31 with the consumed lifetimes arithmetically determined by the operation time integrating circuit 33. When the consumed lifetime of a given consumable part has reached the preset lifetime, the exchange decision circuit 35 outputs an activation signal to an alarm device 36 and at the same time outputs a display command signal to a display control circuit 37. The display command signal contains index information for identifying discriminatively the part or member of concern. The display control circuit 37 serving as a message generating means reads out the preset lifetime information of the consumable part identified by the index information contained in the display command signal from the preset lifetime storage unit 31 and fetches concurrently the consumed lifetime of the consumable part of concern from the operation time integrating circuit 33. Subsequently, the display control circuit 37 commands display of the name of the consumable part of concern, the preset lifetime and the consumed lifetime of that part on the display unit 38. The display unit 38 serving as the messaging means thus displays the name or identifier, the preset lifetime and the consumed lifetime of a consumable part or parts of concern on a display screen 381, as shown in Fig. 2.
A reset switch 39 is electrically connected to the exchange decision circuit 35. When the reset switch 39 is closed or turned on, a reset signal is generated, to which the exchange decision circuit 35 responds for thereby causing the operation time integrating circuit 33 to reset to zero the consumed lifetime of the consumable part which has reached the preset lifetime, while the corresponding content displayed on the display unit 38 is erased with the alarm generated by the alarm device 36 also being cleared.
Fig. 4 is a flow chart for illustrating a consumable part managing program executed by the consumable part managing system C2. When a consumed lifetime Tn of a certain consumable part has reached a preset lifetime Tn0, the consumable part managing system C2 activates the alarm device 36 and at the same time issues a command for displaying the name or identifier of the consumable part, the preset serviceable lifetime and the consumed lifetime. Thus, the operator can exchange the consumable part whose consumed lifetime has reached the preset lifetime Tn0 with a fresh one on the basis of the content displayed on the display unit 38 in response to the alarm generated by the alarm device 36. Upon completion of the part exchanging process, the reset switch 39 is closed. Then, the consumable part managing system C2 resets the consumed lifetime Tn being stored to zero and at the same time erases the relevant content displayed on the display unit 38 and deactivates the alarm device 36.
In this manner, operator or attendant of the jet loom can recognize the consumable part to be exchanged with a fresh one by watching the display content displayed on the display unit 38. The consumed lifetime Tn displayed on the display unit 38 represents an accumulated or integrated value of a period for which the jet loom has actually been put into operation. Thus, the accumulated or integrated time can reflect with high reliability or fidelity the consumed lifetime of the consumable part which has actually been consumed, which in turn means that the display content generated on the display unit 38 can reflect with high accuracy and reliability the actually consumed lifetime of the consumable part. Consequently, the operator can easily know the proper time point at which the exchange of the consumable part has to be performed.
When degree of actual consumption of the consumable part, e.g. degree of actual wearing or abrasion of the cutter 30, is greater or smaller than the predicted one, it is desirable to alter the preset lifetime Tn0 so as to match the progress of actual consumption of the consumable part. Such alteration of the preset lifetime Tn0 can be realized through input manipulation of the input unit 32.
A second embodiment of the present invention will be described by reference to Figs. 5 and 6, wherein like components as those of the first embodiment are denoted by like reference characters and repeated description thereof will be omitted. In the system according to the second embodiment of the invention, an environment sensor 41 serving as a factor detecting means is electrically connected to an operation time integrating circuit 40 of a consumable part managing system C3. As the environment sensor 41 for detecting the environmental conditions, there may be mentioned, for example, a temperature sensor, a humidity sensor, a load current sensor, a power consumption sensor, an air consumption sensor, an acceleration sensor, a load torque sensor, a displacement sensor and the like. The temperature and the load current representing the lifetime affecting factors will affect the lifetimes of electric capacitors and the backup power supply source E and others, respectively, while the factors such as the acceleration and the load torque exert influence to the lifetime of mechanical parts such as gears, bearings or the like. Furthermore, the consumption power represents indirectly heat generation in the system, while the humidity and other atmospheric factors exert influence to corrosion of metallic parts.
The loom control computer C1 supplies the operation time integrating circuit 40 with operation information such as loom rotation speed derived from the output of the rotary encoder 26, the number of times the weft has been inserted, the tension of warps and other operation signal indicative of the loom operation state. The operation time integrating circuit 40 arithmetically determines consumed lifetimes of the components or parts on the basis of the environment information and the operation information in accordance with predetermined arithmetic expression(s). Fig. 6 shows a flow chart for illustrating a consumable part managing program executed by the consumable part managing system C3. As can be seen from Fig. 6, the consumable part managing system C3 fetches the environment information and the operation information at a predetermined timing to thereby determine arithmetically the consumed lifetimes Tn. The succeeding processing is similar to the processing described previously in conjunction with the first embodiment of the invention.
The display contents generated on the display unit 38 by taking into consideration the operation information and the environment information except for operation time of the jet loom reflect the real or actual consumed lifetimes of the consumable parts with higher accuracy when compared with the system according to the first embodiment of the invention, which allows the operator to determine more easily the proper or appropriate time points at which the consumable parts are to be exchanged.
Next, description will be made of a third exemplary embodiment of the present invention by reference to Figs. 7 and 8. In these figures, like components as those of the second embodiment are denoted by like reference characters and repeated description thereof will be omitted. In the system according to the third embodiment of the invention, an arithmetic expression modifying device 42 is electrically connected to an operation time integrating circuit 40 of a consumable part managing system C3. When the degree of actual consumption of the consumable part, e.g. degree of abrasion of the edge of the cutter 30, is more severe than the predicted degree or less than the latter, the arithmetic method of determining the consumed lifetime of the consumable part should be modified in place of altering the preset lifetime Tn0 in conformance with the degree of the actual consumption of the consumable part. To this end, the correcting or modifying device 42 may be provided as a means for modifying the predetermined arithmetic expression(s) employed in the operation time integrating circuit 40.
Fig. 8 is a flow chart for illustrating a consumable part managing program executed by the consumable part managing system C3. A consumable part managing system C3 responds to an arithmetic expression modifying command issued by the arithmetic expression modifying device 42 to thereby modify correspondingly the arithmetic expression(s) which is used for determining arithmetically the consumed lifetime of the consumable part in accordance with a modified or renewed arithmetic expression or expressions. The other processing steps are similar to those of the second embodiment except for modification of the processing step for modification of the preset serviceable life.
The display content derived from calculation in accordance with the modified arithmetic expression and generated on the display unit 38 which content is corrected by taking the aforementioned lifetime affecting factors into consideration can reflect the actually consumed lifetime of the consumable part with much higher accuracy and reliability when compared with the second embodiment. Thus, the operator can easily know the proper or appropriate time point at which the consumable part has to be exchanged.
Next, description will be made of a fourth embodiment of the present invention by reference to Fig. 9. In this figure, reference characters j, j+1, j+2 designate jet looms, respectively, and C(j), C(j+1), C(j+2) designate loom control computers, respectively. Each of the loom control computers C(j), C(j+1), C(j+2) is composed of a central arithmetic/ processing unit CPU, a data memory RAM and a program memory ROM. Actuators Am and environment sensors Sn of the individual jet looms j, j+1, j+2 are operatively connected via input/output ports I/O to the loom control computers C(j), C(j+1), C(j+2), respectively. On the other hand, connected to the loom control computers C (j), C (j+1), C(j+2) are communication interfaces I/F(j), I/F (j+1), I/F(j+2), respectively.
The data memory RAM incorporated in each of the loom control computers C(j), C(j+1), C(j+2) stores therein the control data concerning the rotation number or speed of the loom, the warp tension, weft inserting timing, weaving density and other data for the associated jet loom. Furthermore, the data memory RAM incorporated in each of the loom control computers C(j), C(j+1), C(j+2) serves to store temporarily the environment information derived from the output of the environment sensor Sn provided in the associated jet loom. On the other hand, the program memory ROM incorporated in each of the loom control computers C(j), C(j+1), C(j+2) stores a program for controlling operation of the relevant jet loom on the basis of control data stored in the data memory RAM.
Further, a reference character CH denotes a host computer for managing or controlling concentratively the jet looms j, j+1, j+2. The host computer CH is comprised of a central arithmetic/ processing unit CPUH, a data memory RAMH and a program memory ROMH. Connected to the host computer CH are an input unit 32, a reset switch 39, an alarm device 36 and a display unit 38 via an input/output port I/OH as in the case of the first embodiment of the invention. A program memory ROMH stores therein a program for controlling concentratively the jet looms j, j+1, j+2. The concentratively controlling program mentioned above contains a consumable part managing program similar to the one executed by one of the consumable part managing systems C2 and C3 described hereinbefore in conjunction with the first to third embodiments.
The host computer Cn is provided with a communication interface I/FH which is connected to the communication interfaces I/F(j), I/F (j+1), I/F (j+2) of the jet looms j, j+1, j+2, respectively, via communication lines L. The host computer CH is in charge of concentratively controlling the jet looms j, j+1, j+2 by way of the communication interface I/FH, the communication lines L and the communication interfaces I/F (j), I/F (j+1) , I/F (j+2).
The host computer CH retrieves scanwise the operation information and the environment information stored in the individual loom control computers C (j), C (j+1), C (j+2) via the communication lines L and the communication interfaces I/F (j), I/F (j+1), I/F (j+2), respectively, at a predetermined time interval. In response to the scanwise inquiry of the host computer CH, the individual loom control computers C(j), C (j+1), C (j+2) send the operation information and the environment information to the host computer CH via the communication interfaces I/F(j), I/F(j+1), I/F (j+2), the communication lines L and the communication interface I/FH. The host computer CH arithmetically determines the consumed lifetimes of the consumable parts of the jet looms j, j+1, j+2, respectively, on the basis of the operation information and the environment information as supplied. When the consumed lifetime Tn of a consumable part of a given jet loom has reached a preset lifetime thereof, the host computer CH activates the alarm device 36 and displays the name or identifier of the relevant consumable part(s), the preset lifetime and the consumed lifetime thereof on the display unit 38.
By virtue of the system arrangement in which the management of the consumable parts in a plurality of jet looms is performed en bloc by the host computer CH, there can be achieved advantages mentioned below. Namely, because the arithmetic determination or calculation of the consumed lifetimes of consumable parts as well as storage of the results thereof is performed solely by the host computer CH, the burden imposed on the individual loom control computers can be mitigated. Thus, the management of the consumable parts can be carried out without need for enhancing the capabilities of the individual jet loom computers. Besides, because the identification numbers of the jet looms of concern, the names of the consumable parts, the preset serviceable life and the consumed lifetimes thereof can be displayed on the single display unit 38, expensiveness involved in the system can be mitigated when compared with the system in which the information mentioned above is displayed on a loom-by-loom basis. Additionally, because the data input for the preset serviceable life of the consumable parts in the individual jet looms as well as determination of the arithmetic expressions to be relied on for determining the consumed lifetime can be realized en bloc by the host computer CH, operability of plural jet looms can significantly be enhanced. Additionally, accuracy of the arithmetic prediction of the serviceable lifetimes of the individual consumable parts as well as the data or time points at which they are to be exchanged can be enhanced. Besides, because the environmental sensors for detecting the air-conditioning, electric power consumption state, moisture state and the like can be provided on a shop-by-shop basis, the number of the environment sensors can be decreased when compared with the case where the environment sensors are provided for the jet looms, respectively. Besides, the inventory management of the parts to be reserved for the exchange in the shop as a whole can be facilitated, whereby an effective part exchange schedule can be established for all the shops.
In a modification of the present invention, such arrangement may be adopted that the preset lifetime and the consumed lifetime are displayed so as to allow the operator to make decision as to the exchange of a consumable part without employing the exchange decision means. Alternatively, the operated periods of individual consumable parts may be arithmetically determined on the basis of specifications of the loom, preset values of the control computer and the operated period of the loom, whereon the consumed lifetimes of the individual parts may be determined on the basis of the individual operation times determined arithmetically.
Besides, the present invention may be applied to generation of a message indicating an appropriate time point for maintenance and/or inspection of the consumable part. Further, it should be appreciated that the invention can equally be applied to other textile machinery than the loom such as, for example, blowing machinery, card, drawing frame, fly frame, spinning frame, open-end spinning frame, winder or the like textile machinery. Accordingly, the phrase "textile machinery" used herein should be interpreted in the broadest sense.
As will now be apparent from the foregoing, with the consumable part managing system according to the present invention in which the consumed lifetimes of consumable parts are arithmetically determined on the basis of the information detected by the factor detecting means for detecting factors which affect the serviceable lifetimes of consumable parts, and a corresponding message is issued when the consumed lifetime as determined arithmetically has reached a preset lifetime of that consumable part, it is possible to manage the consumable part concerning the time point appropriate for the exchange thereof.
Many modifications and variations of the present invention are possible in the light of the above techniques. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
In a textile machinery, a system and method capable of determining time points appropriate for exchange of consumable parts, respectively. A preset lifetime storage unit 31 stores preset lifetime values of the consumable parts as inputted through an input unit 32. So long as a jet loom is in operating state, a loom control computer C1 issues a signal commanding a time integrating operation to an operation time integrating circuit 33. The operation time integrating circuit 33 determines consumed lifetime of consumable part on the basis of a time lapse counted by a timer 34 so long as the time integrating command signal is issued by the loom control computer C1. An exchange decision circuit 35 compares the preset lifetime of the consumable part stored in the preset lifetime storage unit 31 with the consumed lifetime determined by the operation time integrating circuit 33. When the consumed lifetime of a given consumable part has reached the preset lifetime, the exchange decision circuit 35 outputs an activation signal to an alarm device 36 and at the same time outputs a display command signal to a display control circuit 37. Subsequently, the display control circuit 37 commands a display unit 38 to display the name of the consumable part of concern together with the preset lifetime and the consumed lifetime thereof.