JPS6021836B2 - Digital rotary cam switch - Google Patents

Description

[Detailed description of the invention] The present invention is aimed at saving labor and manpower in a press machine, and the press position (angle) is a part of the press electric system.
This invention relates to a rotary cam switch that can remotely and quickly set signals based on

Conventional rotary cam limit switches are difficult to operate remotely, and due to the structure of the machine, it is difficult to install them in low places, so when the switch is moved to a high place, it often climbs up to the top of the machine and comes down, making adjustment difficult. On the other hand, if it is possible to set it in a low place, the drive shaft of large machines must be extended downward for a long time, and although it may be easier to operate, there is a risk of damage to the drive shaft, which requires more man-hours for setup. many)
There were drawbacks such as:

The present invention is a method for eliminating this drawback and electrically controlling a press by remote control.The present invention provides a method for electrically controlling a press by remote control. It is intended to provide a cam switch.

The present invention will be explained with reference to the drawings of one embodiment.If the present digital rotary cam switch is of a multiple type, it is possible to obtain a large number of independent signals.

One of the main components of the device is a transmitter and the other is a receiver. The transmitter is made of an insulating resin base plate with copper poured at loo intervals and signal steel plate contacts installed with a hammer.The transmitter is rotated while sliding on it using a brush or roll to detect a short circuit (conductivity). state) and sends the signal to the receiver side. On the receiver side, pin boards are installed at 100 intervals, and operation can be completed by simply inserting pins within the required operating angle (position) range. To explain in more detail from the transmitter side, the first
The figure is a schematic diagram of the transmitter. In the figure, 1 is an insulated resin disk mounting base, 2 is an insulated resin disk, 3 is a protective cover, 4 is a common bus steel ring, 5 is a 10o signal copper plate, and 6 is a 100 signal wire. (3
6), 7 is a common bus wire (1 piece), 8 is a drive shaft, 9 is a bearing, 10 is a brush support placket (resin), 1
1 is a vertical placket bolt, 12 is a short circuit wire, 13 is a brush holder tightening nut, 14 is a brush holder,
15 is a brush (for 1 signal), 16 is a brush (for common bus bar), and 17 is a brush holding spring.

The brush support bracket 10 is connected by a coupling to a drive shaft 8 which rotates once in one cycle of the press, and rotates once together with the drive shaft 8.

The bolt 11 is used to prevent the bracket from loosening and to adjust it.

The brush support bracket 10 is made of insulating resin and is as light in weight as possible. Brush 15 is for catching 100 signals,
The key point of this transmitter is that it contacts two signal steel plates as shown in Figure 2. The brush 15 is a graphite carbon brush used in electric motors, etc. (resistivity 1800-4500mm), current density 6-12A/, contact potential drop 0.4-
1.1V) is appropriate.

A high melting pressure with the steel plate is always maintained by the brush presser spring 17. The common bus bar steel ring 4 is made by pouring it into an insulating resin disk 2 as shown in FIG. 2, and has sufficient strength to withstand vibrations and the like.

The brushes 15 and 16 are electrically short-circuited by a short-circuit wire 12, and current is supplied from the common bus bar 7 to the 100 signal wire 6. Next, the receiver will be explained. FIG. 3 is an electrical circuit diagram of the receiver.

Only a portion of 1-un and 2-hō is shown, but since it is a remote control system, it is possible to connect multiple units.

B1 and B2 correspond to brushes 16 and 15 in FIG. SI to S36 indicate pinboard receptacles. P indicates a pin plug. IR is a plug-in type low power consumption relay. In this example, at the first lotus, the pin plug P is in the proper state at intervals of 500 to 18, and the relay IR is energized.

Also, in the second lotus, the pin plug P is inserted from 360o to 400, so it is 3600, that is, 40o from top dead center.
Until then, the relay 2R is energized. FIG. 4 is a front view of a pin port section of a receiver according to an embodiment, and FIG. 5 is a perspective view thereof.

The receiver in this figure has 5 controls for "top dead center stop" etc.
A series of pinboard sections are illustrated. In the figure, 18 is an application name plate, 19 is a fuse good indicator light, 20 is a pin plug and receptacle, 21 is a transparent cover, 22 is a relay case, 2
3 is an insulating resin receptacle plate. As shown in Fig. 4, the position where the pin plug 20 is inserted is the operating angle, and from top dead center to the right side from 1oo to 2pi, 30o and 17
0o, 1900 to 3500 to the left from bottom dead center
Since the pinboard receptacle 20 is attached to the operating angle of the press slide, it is easy to understand and handle even for beginners. In addition to shortening the setup time, it also allows for accurate setup. Moreover, it can be adjusted even during operation, which is good from a safety standpoint. The present invention has the above-described structure and operation, and when the conventional rotary cam switch is mounted on the crown, at least two workers make adjustments while giving signals, which wastes time and requires man-hours for setup. If the rotary cam switch could be operated from the floor on a large machine, the drive shaft would have to be pulled down for a long time, making it difficult to see the appearance of the press, and there was also the risk of damage to the drive shaft. In the present invention, even if the transmitter is attached to the drive section on the crown, the piso board, which is an example of the receiver, can be installed near the main operation panel etc., so the operability is good and it is safe. Also, since conventional rotary cam switches use continuous cams, only one signal can be set for one cam, but the present invention uses a pin board for the receiver, so only one signal can be set for one cam. You can set multiple signals by dividing the lotus pin port. In other words, if you set 2 or 3 signals for 1 lotus, press 1
The same controlled object can be easily operated two or three times during a cycle. Of course, multiple activations can be set if the device to be controlled allows. With conventional rotary cams, the rotary cam angle was set after the press was stopped, but with this digital type, the angle can be set while the press is in operation. It is very safe. Also, setting the angle of the secondary rotary cam is a matter of the operator's control, and the required angle can only be obtained by repeating it several times, making it even more difficult for beginners, but this rotary cam switch is easy to understand and handle. Therefore, the settings can be easily configured. Also, in the conventional case, it was necessary to pay attention to the direction of rotation, but this is no longer necessary.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the transmitter, Figure 2a is a perspective view for explaining the state of contact between the Misaki signal copper plate 5 and the brush 15, and Figure 2b is the state of connection between the common bus bar steel ring 4 and the insulating resin disc 2. FIG. 3 shows a receiver circuit configuration diagram, FIG. 4 shows a front view of the receiver pinboard section, and FIG. 5 shows a perspective view of the receiver pinboard section. 1 is an insulating resin disc mounting base, 2 is an insulating resin disc, 3 is a protective cover, 4 is a common bus bar steel ring, 5 is a 10o signal steel plate,
6 is 1 pin signal wire (36 wires), 7 is common bus wire (1 wire), 8 is drive shaft, 9 is bearing, 10 is brush support bracket (resin), 11 is bracket tightening bolt, 1
2 is a short-circuit wire, 13 is a brush holder with a nut, 1
4 is a brush holder, 15 is a brush (for 1 and signal), 1
6 is a brush (for common bus bar), 17 is a brush pusher spring, 18 is an application name plate, 19 is a good fuse indicator light, 20 [
Pin plug and receptacle, 21 is transparent cover, 22
2 is a relay case, and 23 is an insulating resin receptacle plate. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1 In a rotary cam switch for a press, signal contacts are installed at a fixed angle pitch on the substrate of a transmitter that operates in synchronization with the rotation of the crankshaft of the press, and a rotating brush that slides on the signal contacts is installed. A digital operating angle system consisting of a transmitter that always spans and contacts two adjacent contacts, and a transmitter that transmits a crankshaft rotation angle signal by the rotation of the brush, and a pinboard receptacle that corresponds to the contact of the transmitter. The pinboard receptacle is electrically connected to a receiver for setting, and the pinboard receptacle is composed of multiple boards so that settings can be made for each purpose. A digital rotary cam switch that provides an excitation signal to the relay of the application.