JPH04163872A - Cable connecting structure - Google Patents

Abstract

PURPOSE:To prevent electric shock at the termination part of the power consuming device side by furnishing the power consuming side device with a switch or sensor for checking if a connector for a power cable is in connection, and connecting a transmission line from the switch or sensor through connector. CONSTITUTION:When the connector 7 of a power supplying side device 1 and the connector 8 of a power consuming side device 2 are connected, the power supplying part 13 of the power supplying side device 1 and a relay coil 16 and a battery 17 are connected with a motor 3 of the power consuming side device 2 and a switch 18 for checking connection, respectively, via the power wire 5 of a cable 4 and a transmission line 6. When the operator turns on the switch 18, contacts 15a, 15b of a relay 14 are shortcircuited, and the power supply terminal Vcc and the power supplying part 13 are put in connection to actuate supplying power to the motor 3. As the relay 14 will never be energized if either of the connectors 7, 8 is disconnected, no voltage is impressed on the power wire 5 of the cable 4, and there is no risk of electric shock even though the termination part is touched by mistake.

Description

DETAILED DESCRIPTION OF THE INVENTION The cable connection structure of the present invention will be described in detail according to the following items.

A. Industrial field of application B2 Overview of the invention C1 Prior art [Figure 7 B1 Problem to be solved by the invention 1i! [Figure 88 E1 Means for solving the problem F, Example [Figures 1 to 6] F-1, First embodiment [Figure 1] a. Configuration, connection, action F-2 , Second embodiment [FIGS. 2 to 4 (a), Second connector b, Connector cover C1 detection section d, Operation e, Modification of detection means F-3, Third embodiment [Fifth embodiment] Fig. 6C G1 Effects of the invention (A, Industrial application field) The cable connection structure of the present invention relates to a cable connection structure for connecting between a power supply side device and a power consumption side device, and relates to a cable connection structure for connecting a power supply side device and a power consumption side device. is a new cable connection that prevents electric shock accidents at the end of the cable on the power consuming device because the power supply device cannot supply power unless the cable is connected to the power consuming device. It seeks to provide structure.

(B. Summary of the Invention) The cable connection structure of the present invention connects a power supply cable pulled out from a power supply device to a power consumption device using a connector, and a switch or the like for confirming the connection of the connector. A sensor is provided on the power consuming device, and the switch or sensor is connected to the power supply connection means of the power supplying device via a transmission line, and the transmission line is connected via the connector to connect the connector. The power supply connecting means is activated by the signal that confirms or detects the connection, and the power supplying device performs the power supply operation, so that power is supplied to the power consuming device by the cable. This is only possible if the device is connected to the power source by a connector, and a connection confirmation signal from a switch or sensor is transmitted to the power supply connection means of the power supply side device via the transmission line, and the power supply connection means is not activated. unless the connector is connected to a power consuming device.
No voltage is applied to the cable pulled out from the power supply device, so even if you accidentally touch the end of the cable on the power consumption device side, you will not get an electric shock, which can improve safety.

(C, Prior Art) [Figure 7 Figure 7 shows an example of a conventional cable connection structure.
This conventional example has a cable connection structure in which a numerical control device is used as the power supply side device and a robot is used as the power consumption side device.

In the figure, a is a numerical control device, b is a robot, and C is a cable for electrically connecting between the numerical control device a and the robot b.

The numerical control device a supplies electric power to drive the robot b, and generates a relatively high voltage.

The cable C is connected to the numerical control device a via a first connector d, and to the robot b via a second connector e.

Furthermore, the connector element d1 on the numerical control device a side of the first connector d is a female connector, the cable C side connector element d2 is a male connector, and the connector element e2 on the cable C side of the second connector e is a female connector. Among the male connectors, the connector element e1 on the robot b side is a female connector, and these connectors d and e are of the so-called pin connector type, and the male connectors d2 and e2 and the female connector dl
, el are respectively connected, the tightening ring prevents them from being removed.

By coupling the first connector d and the second connector e, the numerical control device a and the robot b are electrically connected by the cable C, which makes it possible to supply power to the robot b. be done.

(D. Problem to be Solved by the Invention) [Figure 8] However, in the above-described conventional cable connection structure, when the cable C and the robot b are disconnected, /! There was a problem that accidents were used to occur.

That is, normally, when connecting numerical control device a and robot b with cable C, it is done with the power of numerical control device a turned off, but in case you forget to turn off the power of numerical control device a and the numerical control device Connect cable C to control device a.
When connected using the connector d of the cable C, a voltage is applied to the cable side connector element e2 of the cable C, and there is a problem in that if an operator accidentally touches the cable side connector element e2, he or she may receive an electric shock.

(E. Means for Solving the Problems) Therefore, in order to solve the above problems, the cable connection structure of the present invention connects the power supply cable drawn out from the power supply side device and the power consumption side device. A switch for confirming the connection of the connector or a sensor for detecting the connection is provided in the power consuming device, and the switch or sensor and the power supply connection means of the power supply device are connected by a transmission line. A transmission line is connected through the connector, and the power supply connection means is operated in response to a signal that confirms or detects the connection of the connector, so that the power supply side device performs a power supply operation.

Therefore, according to the cable connection structure of the present invention, power is supplied to the power consuming device when the cable is connected to the power consuming device through the connector, and the connection confirmation signal from the switch or sensor is sent via the transmission line. is transmitted to the power supply connection means of the power-supplying device, and will not be performed unless the power supply connection means is activated, and therefore the cable pulled out from the power-supplying device with the connector disconnected. Since no voltage is applied to the cable, even if you accidentally touch the end of the cable on the power-consuming device side, you will not receive an electric shock, increasing safety.

(F. Embodiment) [FIGS. 1 to 6C] The details of the cable connection structure of the present invention will be explained in accordance with each embodiment shown in the attached drawings.

In each of the illustrated embodiments, the cable connection structure of the present invention is applied to a cable connection structure for connecting a numerical control device and a robot.

(F-1, First Embodiment) [FIG. 1] (a, Configuration) 1 is a numerical control device, which supplies electric power for driving the robot 2.

The robot 2 has a drive motor 3.3 for driving it.
... (only - is shown in the drawing).

4 is a cable connecting the numerical control device 1 and the robot 2, and the cable 4 includes a plurality of power lines 5.5 for driving the drive motors 3.3, . . . of the robot 2.
... (only two are shown in the drawing) and two transmission lines 6.6 for transmitting signals from a connection confirmation switch to be described later.

The cable 4 is connected to the numerical control device 1 via a first connector 7, and to the robot 2 via a second connector 8.

The numerical control device side connector element 7a of the first connector 7 is a female connector, the cable 4 side connector element 7b is a male connector, and the cable side connector element 8a of the second connector 8 is a male connector. The connector element 8b on the robot 2 side is a female connector.

In addition, these connectors 7.8 are stomach connectors, and the female connectors 7b and 8a have pin terminals 9.9, .
..., 10.10, ... is also a female connector 7a
, 8b has bottle receiving terminals 11.11,..., 12.12.
,... are provided respectively.

The numerical control device side connector element 7a of the first connector 7 is fixed to the housing of the numerical control device 1, and the cable side connector element 7b is attached to one end of the cable 4.

The robot-side connector element 8b of the $2 connector 8 is fixed to the base of the robot 2, and its cable-side connector element 8a is attached to the other end of the cable 4.

Here, the cable side connector element 7 of the first connector 7
b or the cable side connector element 8a of the second connector 8
Among the pin terminals 9.9, . . . or 10.10, . . . , those to which the power lines 5.5, .
a, ... or 10a, 10a, ..., and among the transmission lines 6.6, the one to which the e-side transmission line 6a is connected is called 9b.
Or 10b, and the one to which the e-side transmission line 6b is connected is 9.
0 or 10c.

In addition, the first connector 7 has a connector 7 for the numerical control device side.
a or the robot-side connector element 8b of the second connector 8
bottle receiving terminals 11.11,... or 12.12,...
Among them, those connected to the above pin terminals 9a, 9a, . . . or 10a, 10a, . . . corresponding to the power lines 5.5, . . . are 11a, lla, .
a, 12a, ..., and the one connected to the pin terminal 9b or 10b corresponding to the e-side transmission j16a is f.
ib or 12b, and the one connected to the pin terminal 9C or 10c corresponding to the e-side transmission line 6b is Ilc or 1.
Let it be 2c.

Reference numeral 13 denotes a power supply unit disposed within the numerical control device 1, which supplies power for driving the drive motors 3, 3, . . . of the robot 2; Power supply terminal V via relay contact 15 of. C, and the output side of the power supply section 13 is connected to the bottle receiving terminals 11a, Ila, . . . of the numerical control device side connector element 7a of the first connector 7, respectively.

The fixed contact 15a of the relay 14 is connected to the power supply terminal VCC, and the movable contact 15b is connected to the input side of the power supply section 13.

Also, one end of the coil 16 of the relay 14 is connected to the battery 17.
The other end is connected to the e side terminal of the numerical control device side connector element 7a of the first connector 7.
b, and the e-side terminal of the battery 17 is connected to the bottle receiving terminal 11C of the numerical control device side connector element 7a.

Therefore, when the relay coil 16 is energized, the movable contact 1
5b is short-circuited to the fixed contact 15a, and the power supply terminal VCC and the power supply unit 13 are connected.

A connection confirmation switch (SW) 18 is provided on the base of the robot 2, and is a so-called toggle switch that switches between ON and OFF.

Two contacts 19a and 19b of the connection confirmation 5W 18 are respectively connected to the pin receiving terminals 12b and 12c of the robot-side connector element 8b of the second connector 8.

In addition, drive motors 3.3, .
..., the respective connection terminals are the pin receiving terminals 12a, 12a, of the robot-side connector element 8b of the second connector 8.
... are connected to each other separately.

(b, connection, operation) When the first connector 7 and the connector 8 of 's2 are connected, the power supply section 13 of the numerical control device 1
and the drive motors 3.3, . . . of the robot 2 are connected separately via the power lines 5.5, . and the connection confirmation 5W 18 of the robot 2 are connected via transmission lines 6a and 6b of the cable 4.

Then, when the operator manually turns on the connection confirmation 5W 18 of the robot 2, the relay coil 16 of the relay 14 is energized, and the two contacts 15a of the relay 14 are energized.
and 15b are short-circuited, and the power supply terminal VCC and power supply section 1
3 are connected, and as a result, power from the power supply section 13 is supplied to each drive motor 3.3, . . . of the robot 2 through the power lines 5.5, . . . of the cable 4.

Further, if either the first connector 7 or the second connector 8 is disconnected, the relay coil 16 of the relay 14 is not energized, so the relay 14 is not energized. , Therefore, the power supply unit 13 is disconnected from the power supply terminal VCC and the power lines 5.5, .
No voltage is applied to...

(F-2, Second Example) [Fig. 2~! FIG. 4] FIGS. 2 to 4 show a second embodiment of the cable connection structure of the present invention.

This second embodiment is different from the first embodiment in that the connection confirmation 5W18 on the robot 2 side shown in the first embodiment is replaced with a sensor, and is common in many other points. Therefore, the explanation of this second embodiment will mainly focus on the points that are different from the above-mentioned first embodiment, and the other parts will be described with the same reference numerals as the same or similar parts in the first embodiment. Explanation will be omitted by assigning reference numerals.

(a, Second Connector) The cable-side connector element 8a of the second connector 8 is fitted onto the cylindrical main body 20a and substantially the entirety of the main body 20a, and is rotatable around the axis with respect to the main body 20a. , and
Tightening ring 20 that prevents removal to the side opposite to cable 4
b, and the pin terminal 10 is provided inside the main body 20a.
．． 10, . . . are arranged, and a thread is formed on the inner peripheral surface of the tightening ring 20b except for the end on the cable 4 side.

The robot-side connector element 8b of the second connector 8 includes a cylindrical body portion 21a and a square seat portion 2 that are integrally formed.
1b, and the pin receiving terminals 12, 12, . The connector element 8b is attached to the robot 2 by screwing the seat portion 21b to the side surface of the base body 2a.

Then, with the cable-side connector element 8a and the robot-side connector element 8b connected, the tightening ring 20b is screwed onto the main body 21a of the robot-side connector element 8b, thereby connecting the cable-side connector element 8a and the robot-side connector element. 8b is stopped.

(b, connector cover) 22 connects the cable-side connector element 8a and the robot-side connector element 8b, and when the tightening ring 20b is screwed onto the robot-side connector element 8b, the cable-side connector element 8a is attached to the robot side. This is a connector cover to prevent it from being easily removed from the connector element 8b.

The connector cover 22 includes a front cover plate 22a that covers the end of the second connector 8 from which the cable 4 is led out, and a side cover plate 22b that protrudes rearward from both left and right edges of the front cover plate 22a. 22b, and mounting plates 22c, 22c protruding outward from the rear edge of the side cover plates 22b, 22b, and such a connector cover 22 is formed by bending a single sheet metal material. has been done.

Further, the front cover plate 22a is formed with a 0-shaped notch 23 having a width slightly larger than the outer diameter of the cable 4 so as to open at the lower edge, and the mounting plate 22c122c is formed with a notch 23 spaced vertically and appropriately. Screw insertion holes at positions 24, 24,...
is formed.

Further, the length of the side cover plates 22b, 22b is equal to the length of the second connector 8, that is, the length from the surface of the base 2a to the front end of the cable side connector element 8a when attached to the base 2a of the robot 2. It is generally concave or slightly elongated.

To attach the connector cover 22 to the robot base 2a, first, the second connector 8 is connected, and
And the tightening ring 20b is attached to the robot side connector element 8b.
When the second connector 8 is screwed into the main body part 21a, the entire second connector 8 is attached to the front cover plate 22a and the side cover plates 22b, 22.
b, and position the cable 4 so as to lead out from the U-shaped notch 23 to the front side. Next, the mounting plates 22c, 2
Insert screws 2 from the front into the screw insertion holes 24, 24, 2c.
5.25, . . . and screwed into the screw holes 26, 26, .

Also, at this time, the front end of the second connector 8 is connected to the front cover plate 2.
Because it comes into contact with or comes close to the edge of the U-shaped notch 23 of 2a,
In this state, the cable-side connector element 8a of the second connector 8 cannot be removed from the robot-side connector element 8b.

(c, Detection part) -25a (hereinafter referred to as "detection screw") of the screws 25.25, . The screw hole 26.2 is longer than .25 and is formed in the robot base 2a.
When screwed into -26a of 6, . . . , the tip thereof protrudes inside the robot base body 2a.

27 is a detection means for detecting screwing of the detection screw 25a, and the detection means 27 have plate surfaces parallel to each other, and
Two elongated copper plates 2 spaced apart at appropriate intervals
8.29 and an insulating member 30 inserted between one end of both copper plates 28.29 in order to maintain the above-mentioned spacing between the copper plates 28.29.

Such a pressure detection means 27 is arranged inside the robot base 2a (D, near the rear of the second connector 8, and is an extension of the central axis of the screw hole 26a into which the detection screw 25a is screwed). The ends of the copper plates 28 and 29 of the detection means 27 on the side opposite to the insulating member 30 are positioned so as to overlap when viewed from the central axis direction of the screw hole 26a.

Further, the copper plate 28 is connected to the pin receiving terminal 12b of the robot-side connector element 8b, and the copper plate 29 is connected to the pin receiving terminal 12c of the robot-side connector element 8b.

(d, Operation) After connecting the second connector 8, the connector cover 22 is positioned so as to cover the second connector 8, and the connector cover 22 is attached to the robot base using the screws 25, 25, . Attach to 2a.

At this time, among the screws 25, 25, ..., the detection screw 2
When screwing in 5a, the tip first touches the detection means 2.
7 and presses it against the other copper plate 29 side. The copper plate 28 whose tip is pressed is bent and contacts the tip of the other copper plate 29, and the copper plates 28 and 29
Electrical continuity is established with the

By contacting these copper plates 28 and 29, the transmission line 6
a and 6b are short-circuited, and the detection means 27
has the same function as the connection confirmation 5W18 in the first embodiment.

Therefore, if the second connector 8 is connected, the connector cover 22 is attached to the robot base 2a with the screws 25, 25, etc., and the detection screw 25a is not screwed into the predetermined position, the cable 4 power lines 5.5,
No voltage is applied to...

Note that an existing microswitch can be used instead of the detection means 27 described above.

(e. Modification of detection means) In the second embodiment described above, the detection means 27 is the detection screw 2.
Although the one in which one copper plate 28 is pressed and brought into contact with the other copper plate 29 by screwing in the copper plate 5a is shown,
The present invention is not limited to this, and for example, the screwing-in of the detection screw 25a may be detected using a photointerrupter.

31 is a photo interrupter, and a U-shaped holder 32
An LED 33 and a phototransistor 34 are disposed on the two arm pieces so as to face each other.

Such a photo interrupter 31 is connected to the detection screw 2.
When 5a is pushed back in and protrudes inside the robot base 2a, its tip becomes the LED of the photo interrupter 31.
33 and the phototransistor 34 within the robot base body 2a.

Further, the photointerrupter 31 is connected to a signal processing circuit (not shown), and detects when an object blocking light enters between the LED 33 and the phototransistor 34,
It turns on a switch in the signal processing circuit. The switch of the signal processing circuit has two contacts connected to the robot side connector element 8 of the second connector 8.
They are separately connected to the bottle receiving terminals 12b and 12c of b.

When the detection screw 25a is screwed in and reaches the screwed-in completion position, the photointerrupter 31's LE
Detection screw 2 between D33 and phototransistor 34
The tip of 5a is positioned to block the light from the LED 33, and the switch of the signal processing circuit is turned on.
This results in a short circuit between the transmission lines 6a and 6b.

Therefore, even in a modification of the second embodiment using such a photointerrupter 31, the second connector 8 is connected and the connector cover 22 is attached to the robot base 2a by the screws 25, 25, . If it is attached and the detection screw 25a is not screwed in to a predetermined position, no voltage will be applied to the power lines 5, 5, . . . of the cable 4.

(F-3, Third Embodiment) [Figures 5 and 6] Figures 5 and 6 show a third embodiment of the cable connection structure of the present invention.

This third embodiment differs from the second embodiment in that the detection means shown in the second embodiment is replaced with another detection means, and is common in many other points. , regarding the explanation of this third embodiment, please refer to the above first embodiment and second embodiment.
We will mainly focus on the points that are different from the first and second embodiments, and the description of other parts will be omitted by assigning the same reference numerals to the same or similar parts in the first and second embodiments. .

Reference numeral 35 denotes a phototransistor, which is arranged on the inner side of the robot base 2a at the position where one mounting plate 22c of the connector cover 22 is attached, and its detection surface 3
5a is exposed to the outside through a window 36 formed at a portion where the mounting plate 22c is attached.

Therefore, when the detection surface 35a of the phototransistor 35 is attached to the connector cover 22 at a predetermined position, it is covered by the attachment plate 22c and cannot receive external light.

37 is a signal processing circuit including the phototransistor 35.

The collector of the phototransistor 35 is connected to the base of the switching transistor 38, and is also connected to the - side terminal of the collector power supply 40 via a resistor 39, and the emitter of the phototransistor 35 is grounded.

Further, the collector of the switching transistor 38 is connected to the pin receiving terminal 12b of the robot-side connector element 8b, and its emitter is grounded.

Furthermore, the robot-side connector element 8b of the second connector 8
The bottle receiving terminal 12c is connected to the ground line of the signal processing circuit 37.

A diode 41 is inserted between the collector and emitter of the switching transistor 38, and the cathode of the diode 41 is connected to the collector of the switching transistor 38, and the anode is connected to the emitter. This prevents the switching transistor 38 from being destroyed by ringing that occurs when the power lines 5.5, . . .

Therefore, when the connector cover 22 is not attached to the robot base 2a, the window 3 of the robot base 2a
External light enters from 6 and is received by the detection surface 35a of the phototransistor 35.

A collector current flows through the phototransistor 35 that receives external light, turns off the switching transistor 38, and connects the bin receiving terminals 12b and 12 connected to the collector and emitter of the switching transistor 38, respectively.
The transmission line 6.6 is not short-circuited and is not connected to c.
Therefore, no voltage is applied to the power lines 5.5, . . . of the cable 4.

Furthermore, when the second connector 8 is connected and the connector cover 22 is attached to a predetermined position, external light from the window 36 is blocked, and the phototransistor 35 no longer receives external light. Phototransistor 35 (no light reception)
The collector current is cut off and the base potential of the switching transistor 38 is increased, so that the collector current of the switching transistor 38 flows, turning the switching transistor 38 on. When the switching transistor 38 is turned on, the pin receiving terminals 12b and 12c connected to the collector and emitter of the switching transistor 38 are short-circuited, and the transmission line 6.6 is short-circuited at the end on the robot side. The relay 14 in the control device 1 is turned on, and power is supplied from the power supply unit 13 to the robot 2.

(G. Effects of the Invention) As is clear from the above description, the cable connection structure of the present invention is a cable connection structure using a cable between a power consumption device and a power supply device. A power supply cable connected to the power consuming device is connected to the power consuming device via a connector, a switch for confirming the connection of the connector or a sensor for detecting this is provided on the power consuming device, and the switch or sensor is connected to the power consuming device. The power supply side is connected by a transmission line to the power supply connection means provided at The device is characterized in that power is supplied from the device to the power consuming device.

Therefore, according to the cable connection structure of the present invention, power is supplied to the power consuming device via a cable or connected to the power consuming device using a connector, and the connection confirmation signal from the switch or sensor is transmitted via the transmission line to the power consuming device. It is transmitted to the power supply connection means of the supplying device, and is not carried out unless the power supply connection means is activated, so that the cable pulled out from the power supply device with the connector disconnected has no power. No voltage is applied, so even if you accidentally touch the end of the cable on the power-consuming device side, you will not get an electric shock, increasing safety.

In each of the above embodiments, the cable connection structure of the present invention was applied to a cable connection structure between a numerical control device and a robot, but the scope of application of the present invention is limited only to such a structure. For example,
It can be widely applied as a cable connection structure that connects a power supply side device and a power consumption side device, such as a cable connection structure that connects a control unit equipped with a power supply unit and industrial equipment that consumes power.

Further, the specific shapes and structures shown in the above embodiments are merely examples of embodiments of the present invention, and the technical scope of the present invention may be interpreted to be limited by these. , it is not something that will be done.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a first embodiment of the cable connection structure of the present invention, and Figs. 2 to 4 show a second embodiment of the cable connection structure of the present invention, and Fig. 2 shows the main parts. FIG. 3 is an exploded perspective view showing the main parts,
Fig. 4 is an enlarged perspective view showing a modified example of the sensor, Figs. 5 and 6 show a third embodiment of the cable connection structure of the present invention, and Fig. 5 is an exploded view showing the main parts. Perspective view, No. 6
The figures are schematic explanatory diagrams for explaining the outline, Figures 7 and 8.
The figure shows an example of a conventional cable connection structure.
The figure is a schematic explanatory diagram, and FIG. 8 is a perspective view showing problems of the conventional cable connection structure. Explanation of symbols 1... Power supply side device, 2... Power consumption side device, 4... Cable, 5... Power supply cable, 6a, 6b... Transmission line, 8... Connector , 14...Power supply connection means, 18...Switch, 27...Sensor, 31...
・Sensor, 35...Sensor 27 Ceresa Figure 3 Figure 4

Claims (1)

[Claims] In a cable connection structure using a cable between a power consumption device and a power supply device, connect the power supply cable pulled out from the power supply device to the power consumption device via a connector, and check the connection of the connector. A switch or a sensor for detecting the switch is provided on the power consuming device, and the switch or sensor is connected to a power supply connecting means provided on the power supplying device via a transmission line, and the transmission line is connected via the connector. A cable connection structure characterized in that the power supply connection means is operated by a signal that confirms or detects the connection of the connector, so that power is supplied from the power supply side device to the power consumption side device.