JPH0333816B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to a device for controlling a pawl connecting an eccentric disc and a reciprocating moving element according to a given program in a dobby used as a shedding device of a loom. In this element, the control of the dobby transfer lever is achieved by a connecting rod controlled by an eccentric disc.

Prior Art In already known dobies, the control of the transfer lever is achieved by a connecting rod controlled by an eccentric disk, and the coupling mechanism between the eccentric disk and the moving element is complicated by the moving parts of the machine. It was installed.

OBJECTS OF THE INVENTION The object of the present invention is to provide a known dobby with a member for carrying the eccentric disc in a reciprocating motion and a circular motion;
That is, to configure an electronic control device of the pawl that is connected to the moving member, and which device is located outside the area of the disc and the eccentric disc.

The objects of the present invention are achieved by the following items a to c.

a Each heald is controlled by a pair of release levers, which are fitted at a neutral point at the extremity of the carrying member and which, with their forked arms, control a pawl; Each release lever has a support surface on its outer portion that is adapted to be in contact with an electromagnetically controlled support that connects and disengages the eccentric disk.

b The electromagnet controlling the support is connected to an electronics control system. And in particular a contactless switch is connected to this control system,
The non-contact switch uses a sensor to detect the position of the release lever for the required weft pattern and at the same time checks it.

c. Alternate release of the release lever, which is supported against a spring tension, against releasing rules which are rigidly connected to the lever with rollers, is achieved by means of a cam, each The cam has two recesses and one protrusion, which are adapted to synchronize the Dobby electronic pulse device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Further features and advantages of the present invention will be described in detail below based on exemplary embodiments illustrated in the accompanying drawings.

The power device of the dobby includes a disk 1, a conveying member 8 is added to the disk, the disk 1 is connected to an eccentric disk 2 so as not to separate, and a connecting rod 3 is rotatable on the eccentric disk 2. It is installed in
The connecting rod 3 is connected to a delivery lever 5 by a pin 4.

The power unit of the dobby is rotatably mounted on the pin 6 and achieves the raising or lowering of the heald according to a given program by a mechanism not shown.

The control of the dobby power plant is configured in such a way that it can be achieved with a controlled pawl 7, which according to a given program moves the eccentric disc 2 at the end inactive center of the conveying member 8. either engages in a groove 9, 9' formed around the circumference of the disc 1 or is released from the groove by a release lever 10, 10'.

The pawl 7 is elastically mounted in the body of the moving member 8, and the moving member is fixed in the two arms 11;
The two arms are swung to reciprocate around the axis of the pin 6 by a device not shown, and the center point of both ends of the movable member 8 is set between the rising point and the descending point of the transfer lever 5. It is consistent with the crab. The control device of the pawl 7, which is connected to the disc 1 of the eccentric disc by means of a moving member 8, is provided with a pair of release levers 10, 10' for each disc 1, each lever being divided into its two prongs. The pawls 7 are controlled by arms 19, 19', whose outer parts support surfaces 18, 1.
8', and the support surfaces 18, 18' are the supports 13, 1
3', and the supports 13, 13' are attracted to the electromagnets 12, 12',
It is controlled according to a program given by an electromagnet.

In practice, the supports 13, 13' have pivots 20,
20' and fixed from its origin by means of electromagnets 12, 12' towards a stop reference 22, 22'.
1, 21' is swung against the tension.

In order to achieve the release and engagement of the grooves 9, 9' and the pawl 7 in the required exact position, the disc 1 is engaged by the release roller 35 either in the raised or lowered position of the transfer lever 5. It is provided on its surface with two circular grooves 36, 36' which are open only on one side and which are to be mated.

The release roller 35 is swingably mounted on a pivot 37, and the pivot 37 is attached to a lever 38.
The rod 40 swings around the rod 40 against the tension of the spring 39.

The control of the release levers 10, 10' is provided by a program, which is provided in an electronics store (not shown) and is then continued successively for each separate weft thread.

In the scanning of each weft thread, a comparison with a given position of its transfer lever 5 is achieved, and at its starting point the support 13, 13' is moved to the release lever 10, 1.
In order to achieve the effect of 0', electromagnets 12,1
2'.

Control of the supports 13, 13' by the electromagnets 12, 12' is achieved as follows. That is, pins 20,2
The electromagnets 12, 12' controlling the supports 13, 13', which are rotatably mounted about 0', are connected to an electronics control system in which a non-contact switch 42 is activated.
is connected to the electronic control system by at least one sensor 41 mounted on the coupling rod 3 or the transfer lever 5 or also on other elements kinematically connected to the coupling rod, The position of the transfer lever is scanned over each inactive center point and at the same time the scanning weft pattern is checked which is dependent with respect to the position of the transfer lever, ie with respect to the position of the heddle.

If, based on the given program, an incorrect action of the transfer lever 5 occurs due to a defect in a mechanical part, the loom is stopped by means of a correct output of the electronics system.

In this embodiment of Dobby, the electronics system enables synchronized operation of the machine. In other words, during the reversing process for releasing flaws, the interwoven weft threads can be removed by successive release openings without the need for any further intervention.

The synchronizing action of the dobby is caused by the springs 15, 15'
This is achieved by releasing each release lever 10, 10' supporting against a release reference 16, 16' fixedly connected to the lever 30, 30' against the tension of the lever 30, 30'; , 30' guide the rollers 28, 28' on the insertion pins 29, 29' by means of cams 25, 25' having two recesses 26, 26' and one protrusion 27, 27'. be done.

This means that the recesses 26, 2 of the cams 25, 25'
The release levers 10, 10' are each released by the engagement of the rollers 28, 28' in the rollers 6', and the release levers 10, 10' are moved from the proximal end of the supports 13, 13' to the free end on their supporting surfaces 18, 18'. It is pushed to one side. The supports 13, 13' are then already adapted to the dependence of the simultaneous positions of the transfer lever 5 and the selected weft thread pattern according to the positions assigned by the electronics system.

The first recess 26, 26' (in the direction of rotation) of the cam 25, 25' aligns the release lever 10, 10' with the support 1.
3,13' and release the support 13,1
3' is placed in the position given by evaluation and selection of the positions of the transfer lever 5 and the previous weft pattern at the same time.

The angular displacement of the cams 25, 25' causes the rollers 28, 28' to move into the first recesses 26, 26, 25' of the cams 25, 25'.
It is briefly removed from 26' and placed again on the projections 27, 27'. The release lever 10, 10' is then returned to its starting point. The supports 13, 13' then again assume a new position, which is the position assigned corresponding to the current position of the transfer lever 5 and the new weft pattern.

Due to the engagement of the next roller 28, 28' with the second recess of the cam 25, 25', the release lever 10, 1
0' is released again and, according to the position of the supports 13, 13' already assigned, the pawl 7 is released or moved out of the groove 9, 9' of the disc 1.

When the pawl 7 is released, the moving member 8 moves into the grooves 9, 9'.
The release levers 10, 10' are held while leaving the position.

At that time, the second recesses 26, 2 of the cams 25, 25'
By releasing the rollers 28, 28' from 6', the release lever 10, 10' begins to lower the pawl 7 onto the surface of the disc 1 and slides to approximately its end position.

The positioning of the supports 13, 13' depends on the selected weft pattern and the simultaneously existing position of the transfer lever 5, and is achieved at the inactive center of each end of the moving member 8.

Moreover, if the position of the transfer lever 5 is not changed according to the program at the next inactive center of the moving member, the released release lever 10, 10'
is the claw 7 with its bifurcated arms 19, 19'.
must be removed from the grooves 9, 9' of the disc 1 to the maximum extent possible.

Such disengagement of the pawl 7 causes the supports 13,1
3' is attracted by the electromagnets 12, 12' and the release lever 1
0,10' by the free passage of the support surfaces 18,18'.

However, if the position of the transfer lever 5 is changed according to the program to the next inactive center of the moving member 8, the released release lever 10,1
0' does not release the pawl 7 by its forked arms 19, 19', and the pawl 7 is released by the release lever 1.
0, 10' rests on its support surface 18, 18' opposite the support 13, 13', and cannot be removed for release.

If the transfer lever 5 is raised according to the program at the next inactive center of the moving member 8, and if it is also lifted for the time being, the release lever 10, 10' is moved to the next support 13, 13. ' must pass freely and the pawl 7 must therefore be removed from the grooves 9, 9'.

If, while in the next inactive center of the moving member 8, the transfer lever 5 is lowered and it is also downwards then, the release lever 10,
10' is released from the next support 13,1
3' must be allowed to pass freely, and thereby also the pawl 7 must be disengaged from the grooves 9, 9'.

The release levers 10, 10' bear against the supports 13, 13' only if the position of the transfer lever 5 does not correspond to the position selected for the inactive center of the moving member 8. In such a case, the claw 7 is in the groove 9,
It is not disengaged from 9' and as a result the angular change with the eccentric disk of disk 1 occupies its other position.

[Brief explanation of the drawing]

FIG. 1 is a front view of the arrangement of mechanical elements of one dobby unit. FIG. 2 is a diagram showing a state in which the electromagnet attracts the support and the release lever releases the moving member. 1: Disc, 2: Eccentric disc, 3: Connecting rod, 5:
Delivery lever, 7: Claw, 8: Moving member, 9,
9': Groove, 10, 10': Release lever, 12, 1
2': Electromagnet, 13, 13': Support, 25, 2
5' cam, 26, 26': recess, 27, 27' protrusion,
28, 28': roller, 30, 30': lever.

Claims (1)

[Claims] 1 a pair of release levers 1 for each eccentric disk 2;
0,10', each release lever 10,10' controls a pawl 7 with its forked arm 19,19' and has a pin 20,2 on its outer part.
The electromagnet 1 is rotatably mounted around 0' to control according to a given program.
2, 12' are provided with support surfaces 18, 18' adapted to contact supports 13, 13' attached to the electromagnets 12, 12', which are connected to an electronic control circuit and which A non-contact switch 42 is connected to the circuit, and the switch
kinematically connected to the coupling rod 3 by at least one sensor 41 and moving element 8
scans the position of the transfer lever 5 in each inactive center of . Reciprocating, characterized in that the release is achieved by a cam 25, 25' with one protrusion 27, 27' of two recesses 26, 26', which allows a synchronized action of the Dobby electronic pulse device. A claw control device that connects the circulating moving element and the dobby eccentric disk.