JPH07100901B2 - Warp control method for loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to warp control that affects tension differences between upper and lower warp groups such as warp closing timing, warp opening static angle, warp opening amount, and warp path position. It relates to a method of setting conditions.

(Prior Art) The warp tension influences the quality of the woven fabric, that is, the texture and feel of the woven fabric, and various measures have conventionally been taken to control the warp tension to an appropriate value. For example, in the control method disclosed in Japanese Patent Laid-Open No. 59-94648, the displacement of the tension roller due to the fluctuation of the warp tension is detected, and based on the detection result, the rotation speed of the warp delivery motor different from the machine frame drive motor is detected. Is being controlled.

(Problems to be Solved by the Invention) However, it is the warp control amount, which is the tension difference between the upper and lower warps, that decisively influences the texture and the feel of the woven fabric. Since it is based on the detection of the total tension of the fabric, it has almost reached the limit as a measure for improving the fabric quality.

Configuration of the Invention (Means for Solving Problems) Therefore, in the present invention, the tension of at least one warp in the pair of upper and lower warp groups forming the opening is detected at a predetermined time, and the difference in warp tension is input and set in advance. The difference between the detected tension values is compared with a preset value by the control device, and the tension difference between the upper and lower warp groups such as the warp closing timing, the warp opening stationary angle, the warp opening amount, and the warp path position is detected. The correction amount of the warp control conditions that influences is calculated or selected based on the comparison result.

(Operation) That is, the tensions of the upper warp and the lower warp are measured, for example, at the beating time, and the correction amount of the warp control condition is calculated based on the comparison result between the measured tension difference and a preset value. Or elect. Then, for example, by outputting and displaying the calculated value or the selected value, the operator may perform the warp control condition correcting work according to the display result, and the proper warp control condition can be set easily and surely, and the fabric quality It is possible to improve. In the case of warp control conditions that can be automatically corrected, the calculation or selection result can be automatically corrected, which makes it easier to set warp control conditions.

(Embodiment) An embodiment in which the present invention is embodied in a jet loom will be described below with reference to the drawings.

FIG. 1 schematically shows the side surface of the entire loom, and warps T1 and T2 sent out from the warp beam 1 pass through a back roller 2, an easing roller 3 and a tension roller 4 whose height can be adjusted, and a weaving device. 5 is formed on the woven cloth W in the weaving device 5, and is operatively connected to the machine base drive motor M through the expansion bar 6, the surface roller 7, the press roller 8 and the wrinkle removing guide member 9. It is wound around the winding shaft 10. The warp yarns T1, T to which the tension roller 4 applies tension corresponding to the balance weight G
The change in tension 2 is transmitted to the transmission 11 via the link mechanism, and the gear ratio in the transmission 11 is corrected according to the change in tension. The easing roller 3 is operatively connected to a drive disc 14 via a swing lever 12 and a link 13, and the rotation of the drive disc 14 that rotates in synchronization with the rotation of the machine base is converted into the swing of the easing roller 3. It The drive disc 14 is fixed to a drive shaft 15 operatively connected to the machine base drive motor M so that the attachment angle position can be adjusted, and the link 13 is connected to the drive disc 14 so that the attachment position can be adjusted in the radial direction. There is. Therefore, link 13
It is possible to change the easing amount of the easing roller 3 by adjusting the mounting position, and it is possible to change the easing timing of the easing roller 3 by adjusting the mounting position of the link 13.

The rotational driving force of the machine base drive motor M is input to the transmission 11 via the crankshaft 16, the double pulley 17 and the pulleys 18 and 19, and the rotation according to this gear ratio is transmitted via the change gear mechanism 20 to the warp beam. 1 is transmitted. The rotary driving force of the machine base drive motor M is transmitted to the surface roller 7 via the double pulley 17, the pulley 21, and the change gears 22 and 23,
The surface roller 7 rotates in the cloth winding direction.

Warps T1 and T2 through which the dropper 24 for warp cutting detection is inserted and supported.
Is passed through a plurality of heddle frames 25 through a pair of upper and lower retaining members 52, 53, and the heddle frame 25 is vertically moved to form an opening. As shown in FIG. 2, a heald frame 25 suspended and supported by a tension spring 26 is connected to a cam lever 28 which is swung by a replaceable cam 27 which rotates in synchronization with the rotation of a machine base, via a connector 29. It is operatively connected and the turnbuckle 30 in the middle
Is intervening. Then, the warp yarns T1 and T2 are passed through a reed 31 that is erected on a sley (not shown), and a weft yarn Y that is ejected from a weft-inserting main nozzle 32 that is also mounted on the sley.
Is wefted into the warp shed formed by the upper and lower warp groups T1 and T2.

The weft Y inserted into the weft is struck by the reed 31 on the cloth cloth W1 of the woven fabric W, and at the same time, cut and separated from the main weft inserting nozzle 32 by a cutter (not shown). The height of Orizen W1 is W1
It is regulated by a fell plate 33, which has an adjustable height position immediately below. Further, the woven cloth W in the vicinity of the cloth fell W1 is restricted from shrinking in the cloth width direction by the temple devices 34 at both ends of the cloth width.
You will be guided over 34a.

As shown in FIG. 1, a pair of warp tension detectors 35 and 36 are installed in the vicinity of the warp path between the tension roller 4 and the dropper 24.
The tension of one warp is detected by the first warp tension detector 35, and the warp tension of one warp in the other warp group T2 is detected by the second warp tension detector 36. As the warp tension detectors 35 and 36, for example, an electric strain gauge, a load cell or the like is used. Both of the warp tension detectors 35 and 36 are installed at the center of the warp width, which is the center of the warp width, where the most average warp tension is obtained.

In the loom having such a structure, a warp control condition setting device 37 for setting warp control conditions including items such as warp closing timing, warp opening stationary angle, warp opening amount, and warp path position.
Is installed. As shown in FIG. 3, the warp control condition setting device 37 includes an input setting device I, a control device C, and a display device D. The control device C has an input / output interface, a central processing unit CPU, a yarn type, and a weave. The optimum tensions of the upper and lower warps T1 and T2 at the beating time and their tension differences are memorized for each of a number of woven fabric conditions including combinations of width, weaving density, warp design, etc. And a memory that stores the warp control conditions that are influenced. As warp control conditions, the height position of the back roller 3, the easing amount and easing timing of the easing roller 3, the height positions of the warp stopping members 52, 53, the cam 27 shown in FIG.
Angle θ, the height position of the heddle frame 25 when the warp is opened, the closing timing of both warp groups T1 and T2, the height position of the fell plate 33, etc., and the correspondence relationship between these warp control conditions and the optimum tension difference. Is obtained from past data.

Explaining the warp control condition setting device I and the display device D, the number displayed on the display section 39 on the operation panel 38 is changed and displayed by the operation knob 40, and for example, the number 1 is displayed by this display operation. Then, it is possible to input and set a weaving fabric condition such as a weft type, and when the numeral 2 is displayed, it is possible to input and set a weaving fabric condition such as a weaving width. Further, when the numeral 3 is displayed, it is possible to input and set the warp type, when the numeral 4 is displayed, it is possible to input and set a woven fabric condition such as weaving density, and when the number 5 is displayed, a woven fabric called warp texture is displayed. It becomes possible to input and set conditions.

The numbers displayed on the display unit 41 are changed and displayed by the operation knob 42, and the weft-related work fabric condition is displayed on the display unit 41. That is, in order to input and set a weaving fabric condition such as the weft type, the number 1 is displayed on the display unit 39 and the number indicating the weft type is displayed on the display unit 41 (for example,
57) is displayed and push button 43 is turned on. In order to input and set the woven fabric condition of weaving width, the number 2 is displayed on the display unit 39, the number indicating the weaving width is displayed on the display unit 41, and the push button 43 is turned on. Further, in order to input and set the woven fabric condition of weaving density indicating the number of wefts per unit length, the numeral 3 is displayed on the display section 39, the numeral indicating the weaving density is displayed on the display section 41, and the push button is pressed. Turn on 43.

The numbers displayed on the display unit 44 are changed and displayed by the operation knob 45, and the display unit 44 displays warp-related woven fabric conditions. That is, in order to input and set the woven fabric condition called the warp type, the number 4 is displayed on the display unit 39 and the number indicating the warp type is displayed on the display unit 44 (for example,
59) is displayed and push button 46 is turned on. Also, in order to input and set the woven fabric condition called warp design,
The numeral 5 is displayed on 39, the numeral indicating the warp design is displayed on the display section 44, and the push button 46 is turned on.

The controller C selects the optimum upper and lower warp tensions F1, F2 and the difference ΔF in tension based on the input setting of the desired woven fabric condition. The set tension difference ΔF is treated as a comparison target of the warp tension difference between the upper and lower warp groups T1 and T2 as shown in FIG. That is, the detection signals output from the first and second warp tension detectors 35 and 36 are input to the control device C, which controls the rotary encoder 47 for detecting the machine base rotation angle in accordance with the beating time. The upper and lower warp tensions at the beating time are grasped in response to the inputted machine base rotation angle detection signal. The control device C determines the difference Δ from the grasped upper and lower warp tensions F′1 and F′2.
F ′ is calculated, and the set tension difference ΔF and the detected tension difference ΔF ′ are compared. Then, the set tension difference ΔF and the detected tension difference ΔF ′
When and do not match, the difference between the warp control condition corresponding to the set tension difference ΔF and the warp control condition corresponding to the detected tension difference ΔF ′ is calculated as the correction amount. The calculated correction amount is displayed by the display device D each time the push button 48 on the operation panel 38 is turned ON.
Are displayed for each item of the warp control conditions on the display sections 49, 50 and 51. The number displayed on the display unit 49 indicates one of the above items, and the number displayed on the display units 50 and 51 is the calculated item of the item corresponding to the number displayed on the display unit 49. Indicates the correction amount. For example, when the push button 48 is turned on, a number (for example, number 1) corresponding to the item of the height position of the back roller 2 is displayed on the display unit 49, and the display unit 50.
The height position correction amount of the back roller 2 is displayed on. Next, when the push button 48 is turned on, a number (for example, 2) corresponding to the item of easing timing of the easing roller 3 is displayed on the display unit 49, and the display unit 50 displays the correction amount of the mounting angle position of the drive disk 14. Is displayed. When the push button 48 is turned on again, a number (for example, 3) corresponding to the item of the easing amount of the easing roller 3 is displayed on the display unit 49, and the display unit 50 displays the mounting position correction amount of the link 13 with respect to the drive disk 14. Is displayed.

Furthermore, by repeating the ON operation of the push button 48,
Height position correction amount of the back stop members 52, 53, stationary angle θ of the cam 27
The correction amount, the attachment position correction amount of the connecting tool 29 corresponding to the height position correction of the heddle frame 25 at the time of warp opening, the closing timing correction amount of both warp yarn groups T1 and T2, and the height position correction amount of the fell plate 33 are sequentially set. Is displayed. Based on these indications, the height position of the back roller 3, the mounting angle position of the drive disk 14 with respect to the drive shaft 15, the mounting position of the link 13 with respect to the drive disk 14, the height position of the warp members 52, 53, the cam lever. 28 to 29
Each adjustment of the mounting position of and the height position of the fell plate 33,
Further, if the cam is replaced with a cam suitable for the correction amount of the static angle θ, the difference in tension between the upper and lower warp threads is regulated to the difference in tension ΔF corresponding to the desired woven fabric condition, and a woven fabric W excellent in texture and texture can be obtained. . That is, the operator only needs to perform the condition setting work in accordance with the correction amount of the warp control condition calculated and displayed based on the set warp tension difference ΔF and the detected warp tension difference ΔF ′ to determine the optimum warp control condition in a short time and accurately. It is possible to

By using the warp tension of the lower warp group of the upper and lower warp groups as a reference, it is possible to avoid defective warp shedding due to insufficient warp tension that causes weft insertion errors in the jet loom.

Of course, the present invention is not limited to the above-mentioned embodiment, and for example, a large number of warp control condition correction amounts which are set in advance can be selected, or the tension of one warp can be set twice in two cycles of the loom. One warp tension detector detects the warp beating time, and the difference between the detected two warp tensions is compared with the set difference between the upper and lower warp tensions. May be selected to detect the tension, the total tension of the upper warp group and the total tension of the lower warp group, or one warp group and the total warp tension may be detected. Alternatively, it is possible to automatically correct the calculation or selection result for the warp control conditions that can be automatically corrected, and it becomes easier to set the warp control conditions. Further, the set warp tension difference may be directly input to the control device without inputting the setting fabric condition, or by a motor different from the machine drive motor as disclosed in JP-A-59-94648. It is also possible to apply the present invention to a loom equipped with a warp-feeding device that feeds warps.

As described above in detail, according to the present invention, the detected tension difference between the upper and lower warps is compared with the set warp tension difference, and the correction amount of the warp control condition is calculated or selected based on the comparison result. Therefore, the difference between the upper and lower warp tensions that decisively influence the fabric quality is determined to be an optimum value, and the excellent effect of improving the fabric quality can be achieved.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic view showing a side surface of a loom and a warp control condition setting device.
FIG. 2 is a schematic diagram showing the front of the shedding device and the warp control condition setting device, FIG. 3 is a block diagram of the warp control condition setting device, and FIG. 4 is an explanatory diagram. Warp tension detectors 35, 36, warp control condition setting device 37, control device C, display device D, warp yarns T1, T2, set warp yarn tension difference Δ
F.

Claims (1)

[Claims] 1. A tension difference between at least one warp yarn in a pair of upper and lower warp yarns forming an opening is detected at a predetermined time, and a warp tension difference is previously input and set by a controller that sets a difference between the detected tension values. Is compared with a preset value, and the correction amount of the warp control condition that influences the tension difference between the upper and lower warp groups such as the warp closing timing, the warp opening stationary angle, the warp opening amount, and the warp path position is used as the comparison result. A warp control method for a loom that is calculated or selected based on the following.