JPS5953380B2 - Weaving method and equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a weaving method and device for a loom.

As is clear from the attached Figure 1, in conventional power looms, a series of movements such as shedding, inserting, closing, and beating are normally performed continuously in a certain relationship.

However, such a weaving method causes the following problems.

The i-weft inserted into the shed when the shed is open is pushed by the reed and moves in the weaving direction when the shed is open.

Therefore, the weft tension at the time of weft insertion is unstable, making it difficult to obtain a woven fabric uniformly having the desired good hand feel.

The time from the open state to opening and beating is too short.

Therefore, even though the warp threads are closed in shape during beating, the tension remains from when the warp threads are open, and as is well known, the higher the residual tension, the more difficult it is to obtain a taut fabric.

Furthermore, since the opening state changes depending on the handle, the residual tension during hitting the reed also varies depending on the handle.

This may cause weaving defects in the weave layers, and it is also difficult to obtain a fabric with excellent overall tension.

In the case of tapered weaving, the weft threads have a long running trajectory, and in this state, the weft threads are closed and reeded, and the weft thread tension is made extremely weak compared to the warp thread tension to release the weft threads.

However, in conventional power looms, as described above, each movement is performed continuously, so even if the weft yarn's favorable running trajectory is lengthened, it is not possible to maintain that state.

That is, conventional power looms cannot weave tapered weaves.

When using flat foil threads, even if the flat foil threads are driven flat, there is a risk that they may become twisted by the time they are beaten with a reed.

Also, like patterned foil thread, unless a special foil stamping device is attached,
It gets twisted when beaten with a reed and cannot be used as a finished product.

An object of the present invention is to provide a weaving method and device for a loom that eliminates the various drawbacks found in conventional power looms as described above.

In the method of this invention, the beating motion of the loom is temporarily stopped at a position near the rear center point of the crank that does not interfere with restarting operation by releasing the connection between the drive source and the crankshaft. The opening movement continues even when the opening is stopped, and by releasing the connection between the drive source and the opening drive shaft, the opening movement is temporarily stopped near the time of closing, and then the connection between the drive source and the crankshaft is regenerated. By doing so, the beating motion is restarted, and by regenerating the connection between the drive source and the shedding drive shaft, the shedding motion is restarted near the front center point of the crank or at the position where shedding begins.

When weaving is carried out according to the order of the older wefts, the weft threads are driven into the fabric front with the weft threads being constrained to some extent by the warp threads, so the weft threads are held stably by the warp thread groups, and fabric defects such as composition steps do not occur. , the problems mentioned above can be avoided.

In an apparatus for carrying out such a weaving method, power is transmitted to a crankshaft that drives a beating mechanism and a shaft that drives a mechanism that controls shedding motion of a group of warp threads with a predetermined phase difference. , whereby weaving is carried out in accordance with the above method.

The present invention will be explained in more detail below with reference to the accompanying drawings.

Figures 1 and 2 show the conventional weaving timing and
A diagram and a weaving timing diagram according to the present invention are respectively shown, and common reference numerals in each part indicate the same ones, and the contents of the reference numerals are summarized as follows.

CT: Crank timing FC: Front center point SM: Opening movement BC: Back center point BM; Striking movement
PM: Weft insertion section In the case of the conventional method shown in Fig. 1, both the shedding motion SM and the shoving motion BM are performed continuously, and the shedding state is closed at the forecenter point of crank timing CT = 0°. At the same time, sho-uchi is performed.

In the case of the method of the present invention shown in FIG. 2, the rotation of the crank is temporarily stopped near the rear center point BC of the crank, and accordingly, the reed beating motion BM is also temporarily stopped in section A. do.

However, the opening movement SM continues to progress until it reaches a closed state and stops for a period Bte.

- The crank, which had stopped near the back center point of the sword tip, starts moving after the opening movement SM becomes the above-mentioned closed state, and the reed beating movement B
Along with these, M also restarts, beats, and stops near the aftercenter point of the next cycle.

Further, the opening movement θSM, which had been stopped in the closed state, is restarted from the above-mentioned beating time, and the same movement as in the previous cycle is repeated.

3 and 4 show a first embodiment of an apparatus for carrying out the above-described weaving method.

The crankshaft 14 drives the beating mechanism, and the crankshaft 14 is supported by the side frame 1 and the bearing frame 7, respectively.
The two main components are an idle shaft 12 arranged in parallel with the idle shaft 12, an opening drive shaft 16 which is also arranged in parallel with the idle shaft 12 and drives a jacquard driving exerciser 30 (not shown), and a bottom shaft 18.

That is, a motor 3 is mounted on the upper part of the side frame 1 supported by a bracket 2, and the rotation of the motor 1 is transmitted to an idle shaft 12 by a belt transmission mechanism 11.

Intermittent gears 20 and 22 are fixedly attached to the idle shaft 12, and the crankshaft 14 is arranged so as to be engaged with the intermittent gear 20.
A partially toothed gear 26 is provided.

Further, a partially toothed gear 28 is provided on the open drive shaft 16 in a position to engage with the partially toothed gear 22 .

The crankshaft 14 is also provided with a conventional gear 38 which engages with a gear 40 provided on the bottom shaft 18.
Power is transmitted to the bottom shaft 18.

In the above configuration, the partially toothed gears 20 and 26 and the partially partially toothed gear 2
The rotation timing of the crankshaft 14 and the aperture drive shaft 16 is determined by the engagement of the arms 2 and 28, and this engagement relationship is determined by the shoving movement BM caused by the drive of the arm 15.
and the opening movement SM of the jacquard mechanism driven by the driving exetric 30 are determined to be performed in the above-described order.

According to the above configuration, when transmitting the rotation by the motor 3 from the idle shaft 12 to the crankshaft 14 and the opening drive shaft 16, the timing of power transmission is determined by the partially toothed gears 20 and 26 provided between the shafts. 22.28 stipulates that the above-mentioned weaving method be carried out.

Therefore, weaving can be reliably performed by the above method.

Further, in this embodiment, the crankshaft 14 and the opening drive shaft 16
There will be a period when the rotation of the shaft 14.16 is temporarily stopped, but in order to ensure that the timing of power transmission by the partially toothed gear and the rotation/stopping of the shaft 14.16 are synchronized, the rotation stop position of the shaft 14.16 is determined. Axis positioning stopper mechanism 14.1
6 may be provided.

In the embodiment shown in FIGS. 3 and 4, as an example of this, positioning stops 32 are provided on the shafts 14, 16.

This positioning stopper 32 is connected to the shaft 14 as shown in FIG.
, 16, a locking member 35 that engages with the recess of the disk 34, and an arm 36 and a spring 37 that support the locking member 35.

If this positioning stopper 32 is provided on the shafts 14 and 16, the rotation and stopping of each shaft will be reliably performed in synchronization with the power transmission by the partially toothed gear.
M can be precisely controlled.

FIG. 6 shows a second embodiment of this invention,
An idle shaft 12 supported by the side frame 1 and a bearing frame 5゜7, respectively, and a crankshaft 1 that drives the beating mechanism.
4. The main components are a tappet shaft 46 that drives a tappet mechanism 48 that controls the opening movement, an opening drive shaft 16, and a bottom shaft 18.

Similar to the first embodiment, the idle shaft 12 has a partially toothed gear 2.
0 and 22 are provided, and husband and wife partially toothed gears 26 and 2g are further provided on the crankshaft 14 and the opening drive shaft 16 in a position to engage with the partially toothed gears 20 and 22.

The crankshaft 14 is provided with an arm 15 for driving the beating mechanism and a gear 38, and a gear 40 is provided on the bottom shaft 18 so as to engage with the gear 38.

Furthermore, a gear 42 is provided on the aperture drive shaft 16, and a gear 44 is provided on the tappet shaft 46 in a position to engage with this gear 42.

The tappet shaft 46 is provided with a tappet mechanism 48 that controls the opening movement SM.

In the above configuration, the partially toothed gears 20.26 and 22.2
The engagement relationship of 8 is exactly the same as that described in the first embodiment.

That is, the tappet mechanism 48 attached to the tappet shaft 46 is driven by the idle shaft 12. Opening drive shaft 16/tappet shaft 46
The partially toothed gears 20, 26 and 22.28 and the gears 42, 44 are engaged so that the tappet shaft 46 and the crankshaft 14 are driven at a fixed timing. A relationship is established.

Therefore, according to this second embodiment, the tappet mechanism 48 that controls the shedding movement and the arm 15 that drives the beating mechanism are each driven at a constant timing as described above.

According to this invention, after the weft yarn is inserted, the shedding movement is closed, and after a certain timing, the beating movement is restarted to perform the beating.

As a result, the weft threads are constrained to some extent by the warp threads, so the locus and tension of the weft threads are maintained in the desired state from the time of closing until the reeding, and since the weft threads are in a restrained state, the tension of the weft threads is stabilized. In this state, the beating will be carried out.

Therefore, the problems associated with the conventional weaving method using a power loom, as described above, can be effectively avoided.

[Brief explanation of drawings]

Figure 1 shows the timing and timing of the conventional power loom operating system.
FIG. 2 is a timing diagram showing a power loom operating system according to the invention, FIGS. 3 to 5 show an example of the apparatus of the invention, and FIG. 6 shows another example. CT; crank timing, PM; weft entry section, SM;
Opening movement, A; beating movement stop section, BM; beating movement, B
;Opening movement stop section, 1...Side frame,
3...Motor, 5,7...Bearing frame, 11...Belt transmission mechanism, 14...
...Crankshaft, 12 ...Idle shaft, 15
... Arm, 16 ... Opening drive shaft, 2
0. 22. 26゜28・・・・・・Missing gear, 18
...Bottom axis, 32...Positioning stopper, 30...Driving efficient, 46...Tappet axis, 38, 40, 4
2. 44... Gear, 48... Tappet mechanism.

Claims (1)

[Scope of Claims] 1. By releasing the connection between the drive source and the crankshaft, the shoving motion is temporarily stopped at a position near the rear center point of the crank that does not interfere with restarting the operation, and the shoving motion is stopped. Among these, the opening movement is continued, the opening movement is temporarily stopped near the time of closing by releasing the connection between the drive source and the opening drive shaft, and then the connection between the drive source and the crankshaft is regenerated. A weaving method characterized by restarting the beating motion that was previously stopped, and further restarting the shedding motion by regenerating the connection between the drive source and the shedding drive shaft. 2. The idle shaft 12 is provided with partially toothed gears 20 and 22, and the crankshaft 14 that drives the beating mechanism is provided with a partially toothed gear 26 in a position that should engage the partially toothed gear 20. A partially toothed gear 28 is provided on the shedding drive shaft 16 that drives the shedding mechanism in a position to engage with the partially toothed gear 20 , 22 , 26 . , 2g.