JPH0624975Y2 - Non-contact type signal transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] (Industrial field of application) This invention relates to a device body on the fixed side in a press device equipped with a moving bolster, a welding device capable of switching jigs, and the like. The present invention relates to a contactless signal transmission device used for electrically connecting a movable bolster or a jig on the movable side in a contactless manner.

(Prior Art) In general, press devices in a production line or the like are provided with detectors for detecting the state of a work carried in and the operating states of various actuators, and based on signals from these detectors, Controls the press machine or the equipment that covers the preceding and following processes. Therefore, in particular, in a moving bolster or the like in which the mold can be quickly replaced, the selected bolster-side detector can be appropriately connected to the control device provided outside the press device.

Conventionally, as a signal transmission device applied to the above-mentioned press device, for example, there is one described in Japanese Utility Model Publication No. 54-35158.

The device disclosed in the above publication is provided with a power source and a signal transmission box having the same number of photocell switches as detectors on a movable carriage provided with a press die, and operates on the fixed side in response to the actuation of the photocell switches. A signal receiving box having the same number of photoelectric tube switches is provided, and the signal receiving boxes are connected to the control device.
Further, in the above-mentioned signal transmission device, when the moving carriage is set at a predetermined position, the signal transmitting box and the signal receiving box are close to and face each other, and the wiring on the moving carriage side and the fixed side are fixed. The signal from the detector can be transmitted between the photoelectric switch in the non-contact state and sent to the control device without being directly connected to the wiring.

(Problems to be solved by the invention) However, in the conventional signal transmission device as described above, a pair of relays are formed in the parts (the signal transmission box and the signal reception box) that face each other in a non-contact state. Since only the photocell switch was provided, it is clear that the power supply must be provided on the side of the mobile vehicle equipped with the detector.

Here, a plurality of moving carriages in the above-described pressing device are naturally prepared because they are intended to be exchanged appropriately according to the type of work.

Therefore, in the conventional signal transmission device, it is necessary to provide a power source for each trolley, and it is necessary to charge or replace the power source for each trolley, and the wiring on the trolley side may be complicated. was there.

(Purpose of the Invention) The present invention has been made in view of such a conventional problem, in which the fixed side and the movable side are not provided with a power source on the movable side which is appropriately exchanged with respect to the fixed side. It is an object of the present invention to provide a non-contact type signal transmission device capable of transmitting a signal in a non-contact state between them and eliminating a conventional problem caused by installing a power source on a movable side.

[Construction of the Invention] (Means for Solving the Problems) In the contactless signal transmission device according to the present invention, a primary coil communicating with a power source is wound around a fixed side on which a rail is laid, and a guide direction by the rail is provided. The iron core has an iron core aligned with the axis and one of a pair of non-contact relays, is equipped with a workpiece machining device, and is inserted into the movable side guided by the rail at a predetermined position with respect to the fixed side. A secondary coil and the other of the contactless relays using the secondary coil as a power source are provided.

(Example) Hereinafter, this invention is demonstrated based on drawing.

1 to 3 are views for explaining one embodiment of the present invention, and in this embodiment, the case where the non-contact type signal transmission device is applied to a jig of a welding device is illustrated. .

That is, reference numeral 1 in FIG. 1 is a welding device, and the welding device 1 has rails 3a, 3 on the base 2 which is the fixed side.
wheel 4 which lays down b and engages with the rails 3a and 3b
The jig carriage 5 on the movable side provided with a and 4b is provided. In addition, in this embodiment, the jig carriage 5 is provided with the clamp devices 26 and 27 for holding the panel-shaped work in preparation for welding as the work processing equipment. Further, the jig carriage 5 is provided with a lifter 6 for lifting up the work after welding, and in order to confirm the reciprocating movement of the lift 6, detectors (for example, limit switches etc.) are provided at both ends of the operation. 7a and 7b are provided.

The non-contact type signal transmission device in the welding device 1 is the second
As shown in FIGS. 3 and 4, the fixed side plate 8 mounted on the upper surface of the base 2 has a primary coil 9 communicating with the power supply 16.
A movable side plate 12 equipped with a round bar-shaped iron core 10 around which is wound and a signal receiving box 11 and attached to a side portion of the bolster 5.
The secondary coil 13 has a diameter substantially the same as that of the primary coil 9 and a signal transmission box 24.

The iron core 10 is substantially horizontal with its axial direction aligned with the guide directions of the rails 3a and 3b, and approximately half of one side projects from the cylindrical case 15 fixed to the fixed side plate 8. The primary coil 9 is wound around the inner portion. Inside the signal receiving box 11,
Two phototransistors 14a and 14b, which are one of a pair of non-contact relays, are provided, and each phototransistor 14a and 14b is connected to the relays 17a and 71b and is also connected to the control device 19 via the cable 18. .

The secondary coil 13 is a rectifier 20 in the signal transmission box 24.
Connected to. Inside the signal transmission box 24, two photocouplers 21a and 2b which are the other of the pair of non-contact relays and use the secondary coil 13 as a power source are provided, and each of the photocouplers 21a and 21b is provided. One terminal is connected to the rectifier 20, and a cable 22 is connected to the other terminals of the photocouplers 21a and 21b and the rectifier 20 to the detectors 7a and 7b described above.

Here, in the non-contact type signal transmission device, when the jig carriage 5 is stopped at a predetermined position of the base 2, one side portion of the iron core 10 is inserted into the inside of the secondary coil 13 in a non-contact state, and The positions of the respective parts are set so that the phototransistors 14a and 14b and the photocouplers 21a and 21b face each other without contact. Since the above-mentioned position setting is already performed on each plate 8 and 12, the signal transmission device is mounted by positioning so that the plates 8 and 12 face each other and connecting the cables 18 and 22. It is a very simple thing to connect. Further, although the secondary coil 13 is exposed in the above-described embodiment, the secondary coil 13 may be held by, for example, a case that opens to the side where the iron core 10 is inserted. Further, the welding apparatus 1 is provided with some other jig carriages (not shown) equipped with clamp devices corresponding to different works, and each jig carriage has a secondary coil and A signal box is attached.

In the non-contact type signal transmission device, when the jig carriage 5 is stopped at a predetermined position of the base 2 and the primary coil 9 is energized, a voltage is induced in the secondary coil 13 by an electromagnetic induction action via the iron core 10. , Each detector 7a, 7b and signal transmission box 1
Supply current to the circuits in 4. Therefore, each detector 7
When a detection signal is output from a, 7b, the corresponding photocoupler 21a, 21b emits light, and the optical signal is converted into an electric signal by the phototransistors 14a, 14b and sent to the control device 19. Then, the operating state of the lift 6 is grasped by the signal input to the control device 19, and further, the clamp device and the work transfer device are controlled.

That is, the signal transmission device according to the above-described embodiment supplies the electric current for operating the detectors 7a and 7b to the jig carriage 5 side that is appropriately replaced without artificially performing the cable connection work, and detects the electric current. The signals from the devices 7a and 7b can be transmitted to the board 2 side. At this time, the detectors 7a and 7b and the photocouplers 21a and 21b can usually operate with a weak current, Both coils 9,
With the configuration of 13 and the iron core 10, sufficient current can be supplied from the base 2 side to the jig carriage 5 side. Further, since the jig truck 5 side is not provided with a power source, the wiring on the jig truck 5 side can be simplified.

In addition, in the above-described embodiment, the case where the jig carriage 5 is approached and separated from the one side direction of the base 2 is shown. However, when the jig carriage 5 is replaced from both sides of the base, The two ends of the iron core 10 are projected from the case 15, and the secondary coil and the signal transmission box of each jig carriage are arranged correspondingly. Further, since the number of detectors may differ depending on the jig cart, it is preferable to house the phototransistors corresponding to the photocouplers of all the jig carts in the signal receiving box 11.

The non-contact type signal transmission device according to the present invention is not limited to the welding device in its scope of application, and can be applied not only to the press device, but also to the fixed side and the movable side that is exchanged with the fixed side and needs to receive electric power. Can be applied to the combination with the above, and at this time, since it is not necessary to provide a power source on the movable side, there is no problem even if the movable side that is not used is stored as it is. Further, the detailed structure is not limited to the above embodiment, and a photoelectric tube switch or the like may be used as a pair of relays, for example.

[Effects of the Invention] As described above, according to the non-contact type signal transmission device of the present invention, the primary side leading to the power source is wound around the fixed side on which the rail is laid and the guide direction by the rail is provided. The iron core is provided with a core aligned with the axis and one of a pair of non-contact relays, equipped with a workpiece machining device, and on a movable side guided by the rail, the iron core being inserted at a predetermined position with respect to the fixed side. Since the secondary coil and the other of the contactless relays using the secondary coil as a power source are provided, electric power can be supplied from the fixed side to the movable side, so that the fixed side is appropriately replaced. It has an excellent effect that a signal can be transmitted in a contactless manner between the fixed side and the movable side without providing a power source on the movable side equipped with a work processing device, and as a result, the movable side of the related art can be used. To power It is possible to eliminate all the problems caused by installing.

In addition, the non-contact type signal transmission device described above is used in a work site where a work processing device on the movable side is used, that is, in an environment that is easily affected by vibration or the like. In the combination with the movable side guided by, by adopting the above-mentioned iron core and coil, even if there is some error in the vertical and horizontal directions with respect to the moving direction of the movable side, the iron core is used as the secondary coil. Power can be reliably supplied in the inserted state.

[Brief description of drawings]

FIG. 1 is a side view illustrating a welding device provided with a signal transmission device according to an embodiment of the present invention, and FIG. 2 is an enlarged side view of a partially broken signal transmission device in the welding device shown in FIG. FIG. 3 and FIG. 3 are explanatory views schematically showing a signal transmission device according to an embodiment. 2 ... Base (fixed side), 3a, 3b ... Rail, 5 ...
Jig carriage (movable side), 9 ... primary coil, 10 ... iron core, 13 ... secondary coil, 16 ... power supply, 14a, 14
b ... Phototransistor (one side of non-contact relay), 2
1a, 21b ... Photo coupler (other side of non-contact relay), 26, 27 ... Clamping device (workpiece processing equipment).

Claims (1)

[Scope of utility model registration request] 1. A fixed side, on which a rail is laid, is equipped with an iron core having a primary coil leading to a power source and an axis aligned with a guide direction of the rail, and one of a pair of non-contact relays. A secondary coil that is provided with a device for use and is guided by the rail, and has a secondary coil in which the iron core is inserted at a predetermined position with respect to the fixed side, and the other of a non-contact relay that uses the secondary coil as a power source. A non-contact type signal transmission device characterized by being provided.