JPH0217027Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for preventing erroneous operation of a loom having a dobby.

<Prior Art> In conventional looms, the forward and reverse operations of the loom and the forward and reverse operations of the dobby are performed independently, so that the operator switches the dobby according to the state of the loom.

<Problems to be solved by the invention> However, if the operator makes a mistake in this switching operation, the movement of the dobby side will be reversed, resulting in a problem that the fabric structure will be out of order.

Therefore, an object of the present invention is to prevent erroneous operation by preventing the loom from operating even if the operation switch or inching switch is operated when the operating direction of the loom and the operating direction of the dobby do not match.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a detection device that detects the forward rotation position and reverse rotation position of the forward/reverse switching means of the dobby, and the forward rotation drive circuit of the loom. A contact that closes only when the detection device detects the dobby forward rotation position is inserted, and a contact that closes only when the detection device detects the dobby reverse rotation position is inserted in the reverse drive circuit of the loom. This is how it was done.

<Operation> In other words, the forward rotation drive circuit of the loom can be established only when the forward/reverse switching means of the dobby is in the forward rotation position,
In addition, the loom's reverse drive circuit can be established only when the forward/reverse switching means of the dobby is in the reverse position, thereby preventing erroneous operation.

<Example> An example of the present invention will be described below based on the drawings.

Figure 2 shows the configuration of the loom. 1A in the figure,
1B is a frame of the loom, 2 is a reed, 3 is a woven fabric, 4 is a breast beam, and 5 is a cross roller. 6 is a heald frame, 7 is a dobby stand, 8 is a dobby, 9 is a guide roller, and 10 is an opening rope that connects the opening lever of the dobby 8 and the heald frame 6 and is guided by the guide roller 9 on the way.

Reference numeral 11 denotes a main shaft of the loom, which is rotationally driven by a main motor 12 via a pulley 13, a belt 14, and a pulley 15. 16 is a drive pulley fixed to the main shaft 11, 17 is a driven pulley of the dobby 8, a toothed belt 18 is stretched between both pulleys 16 and 17, and the dobby 8 is driven from the loom. Reference numeral 19 denotes a forward/reverse switching lever as a forward/reverse switching means for the dobby 8, and the position shown by the solid line is the forward rotation position, and the position shown by the chain line is the reverse rotation position.

20A and 20B are operation panels attached to frames 1A and 1B, respectively, and each operation panel 20A,
20B includes an operation switch 21 and a stop switch 2.
2. A forward inching switch 23 and a reverse inching switch 24 are provided. Note that each switch is an automatic return type push button switch.

Here, a forward rotation position detection limit switch 25 is provided as a detection device for detecting the forward rotation position of the lever 19 by facing one side of the forward/reverse switching lever 19 of the dobby 8, and by facing the other side and detecting the forward rotation position of the lever 19. Lever 1
A limit switch 26 for detecting the reverse rotation position is provided as a detection device for detecting the reverse rotation position of the rotation position 9.

FIG. 1 shows the configuration of the control circuit.

A in the figure is a stop circuit, and a stop relay 27 is connected in series with the stop switch 22. B is an operating circuit, which is connected in series with the operating switch 21 to a contact 25a of a limit switch 25 for detecting forward rotation position;
The normally closed contact 27a of the stop relay 27 and the normal rotation drive relay 28 are connected, and the normally open contact 28a of the normal rotation drive relay 28 is connected in parallel with the operation switch 21. Reference numeral C denotes a normal rotation inching circuit, in which a contact 25b of a normal rotation position detection limit switch 25 and a normal rotation inching drive relay 29 are connected in series with the normal rotation inching switch 23. D
is a reverse inching circuit, in which a contact 26a of a limit switch 26 for detecting reverse position and a reverse inching drive relay 30 are connected in series with the reverse inching switch 24. The driving circuit B and the forward inching circuit C are both normal drive circuits of the loom, and the reverse inching circuit D is a reverse drive circuit of the loom.

A contactor 32 that is closed by the operation of the forward rotation drive relay 28 or the forward rotation inching drive relay 29 is installed in the forward rotation energization circuit 31 of the main motor 12, and a contactor 32 is installed in the reverse rotation energization circuit 32 of the main motor 12 for reverse rotation drive. A contactor 34 is provided which is closed by the operation of a relay 30.

Next, the action will be explained.

When operating the loom, the forward/reverse switching lever 19 of the dobby 8 is brought to the forward rotation position shown by the solid line. As a result, the normal rotation position detection limit switch 25 is activated, and its contacts 25a and 25b are closed. If the operation switch 21 is closed in this state, the forward rotation drive relay 28 is activated, the contact 28a is closed, this operation circuit B is self-maintained, and the main motor 12
The contactor 32 in the normal rotation energizing circuit 31 is closed. Therefore, the main motor 12 is activated to rotate the main shaft 11 via the pulley 13, belt 14, and pulley 15, and operate the loom. In conjunction with this, the dobby 8 is operated via the pulley 16, belt 18, and pulley 17 to control the vertical movement of the heald frame 6 and weave the woven fabric 2.

When stopping, when the stop switch 22 is closed, the stop relay 27 is activated and opens the normally closed contact 27a in the operating circuit B, so the self-holding is released and the normal rotation drive relay 28 returns to normal operation. The contactor 32 is opened and the main motor 12 is stopped.
Although not shown, it goes without saying that the braking device operates simultaneously with the opening of the contactor 32.

If you want to perform normal inching drive after stopping,
When the forward rotation inching switch 23 is closed, the forward rotation inching drive relay 29 is activated to close the contactor 32, so while the forward rotation inching switch 23 is closed, the main motor 12 rotates in the forward direction. , the loom and the dobby 8 are driven in normal rotation.

Even if the reverse inching switch 24 is closed at this time, the reverse inching drive relay 30 does not operate and the main motor 12 does not operate because the contact 26a of the limit switch 26 for detecting reverse position is in an open state.

Therefore, when performing reverse inching, if the forward/reverse switching lever 19 of the dobby 8 is rotated to the reverse position shown by the chain line, the limit switch 2 for detecting the reverse position is activated.
6 is activated and its contact 26a is closed, and then the reverse inching switch 24 is closed.
Then, the reverse inching drive relay 30 is activated and closes the contactor 34 in the reverse energization circuit 33 of the main motor 12, so the main motor 12 is reversely driven and the loom and dobby 8 are also driven in the reverse direction.

Even if the operation switch 21 or the forward rotation inching switch 23 is closed when the forward/reverse switching lever 19 of the dobby 8 is in the reverse position, the contacts 25a and 25b of the forward rotation position detection limit switch 25 are open. Main motor 12 does not operate.

<Effect of the invention> As explained above, according to the invention, the loom and dobby can be operated only when the operating direction of the loom and the operating direction of the dobby match, so that there is no possibility of erroneous operation. It is possible to prevent operation with different operating directions, and it is possible to prevent the fabric structure from becoming distorted due to this.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a front view of the loom. 8...Dobby, 11...Main shaft, 12...Main motor, 19...Forward/reverse switching lever, 21...Run switch, 22...Stop switch, 23...Forward rotation inching switch, 24...Reverse rotation inching switch , 25...Normal rotation position detection limit switch,
25a, 25b... Contact, 26... Limit switch for detecting reverse position, 26a... Contact, A... Stop circuit, B... Driving circuit, C... Forward rotation inching circuit, D... Reverse rotation inching circuit.

Claims (1)

[Scope of utility model registration request] In a loom with a dobby having forward rotation drive circuits B and C and a reverse rotation drive circuit D of the loom, detection devices 25 and 26 are provided to respectively detect the forward rotation position and the reverse rotation position of the forward rotation switching means 19 of the dobby 8, and the above-mentioned Contacts 25a and 25 in the forward rotation drive circuits B and C are closed only when the detection device 25 detects the forward rotation position.
A device for preventing erroneous operation of a loom with a dobby, characterized in that the reverse rotation drive circuit D is provided with a contact 26a that closes only when the detection device 26 detects the reverse rotation position.