JPH09111573A - Driving of jacquard machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems of insufficient opening time and crosspoint opening time by transmitting the motion of a motor of a loom to a jacquard machine with ununiform motion. SOLUTION: A jacquard machine is driven by transmitting the rotational power of an elliptic gear 4 fixed to an end of an output shaft 2 of a loom W to an elliptic gear 8 of a 2nd shaft 6 placed parallel to the output shaft 2 and transmitting the motion with ununiform motion from a completely round sprocket 10 attached to an end of the 2nd shaft 6 through a chain 14 to the input shaft of the jacquard machine. The opening time at the side of the loom W and the opening time of a crosspoint are prolonged by setting the opening time of the jacquard J to about 0 deg. and 180 deg. of the input power phase.

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a driving method of a jacquard machine.

[0002]

2. Description of the Related Art Conventionally, for example, a jacquard machine is shown in FIG.
As shown in, bevel gear B, universal coupling shaft S, (chain)
By being connected to the electric motor M of the loom by
It is transmitted as a uniform rotational motion and is driven in perfect synchronization with the loom.

By the way, regarding the relationship between the opening time of the loom and the weft insertion time / timing, it is often necessary for the jacquard machine to lengthen the opening time depending on the characteristics of the loom. , Which depends on the characteristics of the rotation / linear motion conversion mechanism. Traditional, simplest and cheapest rotation /
When the shedding motion is realized by a crank-sliding mechanism or an eccentric-sliding mechanism, which is a linear motion converting mechanism, the shedding time required by the loom tends to be insufficient. For the same reason, the cross point opening time (repulsion time) may be insufficient.

[0004]

In order to solve this problem, there is a method in which a link mechanism is combined with a cam mechanism, a crank / slide mechanism, etc. to extend the opening time, but it is complicated and expensive. It has become a thing.

The present invention has been made in order to solve this problem, and aims to make up for the shortage of the shedding time (and the cross point shedding time) of the loom with a relatively simple mechanism.

[0006]

A method of driving a jacquard machine according to the present invention is characterized in that the transmission of the motion from the electric motor of the loom to the jacquard machine is performed at a non-uniform speed.

In order to realize this non-uniform velocity motion, for example, a known meshing transmission mechanism for elliptical gears, a chain transmission mechanism for an elliptical sprocket, and a synchronous transmission belt transmission mechanism for an elliptical pulley can be used. it can.

[0008]

According to the present invention, the transmission of the motion from the electric motor of the loom to the jacquard machine is performed at a non-constant velocity motion. The opening time on the loom side can be extended.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the first embodiment of the present invention. The difference from the prior art is that an elliptical gear 4 is provided at the end of the loom output shaft 2 and the rotational force thereof is transmitted to an elliptical gear 8 of a second shaft 6 provided in parallel with the loom output shaft 2. The second shaft 6 is provided with a perfect circle sprocket 10,
The movement from the loom output shaft 2 is transmitted to the jacquard input shaft 12 by the chain 14. The second shaft is used for power transmission, one end of which is fixed to the loom frame and the other end of which is fixed to a fixing member outside the loom.

FIG. 2 is a perspective view of the second embodiment of the present invention. The difference from the prior art is that an elliptical gear 16 is provided on the jacquard input shaft 12. The circular sprocket 2 of the second shaft 18 provided with the rotational force transmitted from the loom output shaft 2 by the chain 14 in parallel with the jacquard input shaft 12.
No. 0, and is transmitted to the jacquard input shaft 12 via the elliptical gear 16 provided on the second shaft and the elliptical gear 22 of the jacquard input shaft 12 meshing with the elliptical gear 16. The second shaft is for power transmission intervention, one end of which is fixed to the Jacquard machine frame and the other end of which is fixed to a fixing member outside the Jacquard machine.

FIG. 3 is a perspective view of the third embodiment of the present invention. The difference from the prior art is that elliptical gears 4 and 16 are provided at the end of the loom output shaft 2 and the end of the jacquard input shaft 12, respectively, and both are connected by a chain 14.

Although not shown, the conventional bevel gear-universal coupling shaft-bevel gear drive system (see FIG. 10) is also slightly modified to obtain the first, second and third embodiments. It is clear that the structure can be applied.

In FIG. 1 or FIG. 2, the angular displacement curve when the elliptical gear is engaged as shown in FIG. 4 is shown in FIG. 5, and the angular velocity ratio displacement curve is shown in FIG. In the case of motion transmission between perfect circles, as shown by the dotted line, the rotational motion is uniformly transmitted without being biased to either side. On the other hand, if the gears are elliptical gears, the motion transmission is non-uniform. For example, the output change becomes small around 0 degree of the input, and
It can be seen that the output changes greatly before and after. Therefore, if the opening period of the jacquard is adjusted to around 0 degrees of the input, the opening time (and crosspoint opening time) of the loom side
Can be lengthened.

Further, in FIG. 1 or FIG. 2, an angular displacement curve when the bilobal elliptical gear meshes as shown in FIG. 7 is shown in FIG. 8, and an angular velocity ratio displacement curve is shown in FIG. In the case of motion transmission between perfect circles, as shown by the dotted line, the rotational motion is uniformly transmitted without being biased to either side. On the other hand, if the two-leaf elliptical gears are mutually in motion, the motion transmission is non-uniform. For example, it can be seen that the output change is small around 0 and 180 degrees of the input, and the output change is large around 90 and 270 degrees of the input. Therefore, if you adjust the opening period of Jacquard around 0 and 180 degrees of input,
The opening time and cross point on the loom side can be lengthened.

[0016]

According to the present invention, the shortage of the opening time (and the cross point opening time) of the loom can be compensated by a relatively simple mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a perspective view of a second embodiment of the present invention.

FIG. 3 is a perspective view of a third embodiment of the present invention.

FIG. 4 is a schematic view showing a state where elliptical gears are meshed with each other in the present invention.

FIG. 5 is a graph comparing the angular displacements of the present invention and the prior art.

FIG. 6 is a graph comparing the angular velocity ratio displacements of the present invention and the prior art.

FIG. 7 is a schematic view showing a state in which the bilobal elliptical gears are meshed with each other in the present invention.

FIG. 8 is a graph comparing the angular displacements of the present invention and the prior art.

FIG. 9 is a graph comparing the angular velocity ratio displacements of the present invention and the prior art.

FIG. 10 is a perspective view showing a driving system of a conventional Jacquard machine.

[Explanation of symbols]

 J Jacquard machine W loom 2 Loom output shaft 4,8,16,22 Elliptical gear 6 Second shaft 10,20 True circle sprocket 12 Jacquard input shaft

Claims (4)

[Claims] 1. A method of driving a jacquard machine, wherein the transmission of the motion from the electric motor (M) of the loom (W) to the jacquard machine (J) is a non-uniform speed motion. 2. The method according to claim 1, wherein the means for making the transmission of the motion from the electric motor of the loom to the jacquard machine a non-uniform velocity motion is a meshing transmission mechanism of elliptical gears. 3. The method according to claim 1, wherein the means for transmitting the motion from the electric motor of the loom to the jacquard machine at a non-uniform speed is a chain transmission mechanism using an elliptical sprocket. 4. The method according to claim 1, wherein the means for transmitting the motion from the electric motor of the loom to the jacquard machine at a non-uniform speed is a synchronous transmission belt transmission mechanism using an elliptical pulley.