JPH061810U - Working state detection device - Google Patents

Abstract

(57) [Abstract] [Purpose] In an operating state detection device that detects the operating state of a working device, if an abnormality such as disconnection or short-circuit occurs, let the working device determine that fact and prevent the malfunction of the working device. We provide things that can be prevented. An operating state detection device 20 outputs a first detection signal when the working device is not in a predetermined operating state, and outputs a second detection signal when the working device is in a predetermined operating state. It has a part 21. Furthermore, when either one of the first detection signal and the second detection signal is output from the detection signal output unit 21, the detection signal output unit 21 outputs a determination signal indicating that the detection signal output unit 21 is normal, and the first detection signal is output. When both the detection signal and the second detection signal are output,
Also, it has a determination signal output unit 22 that outputs a determination signal indicating that the detection signal output unit 21 is abnormal when both the first detection signal and the second detection signal are not output.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating state detection device for a working device for detecting whether a working device such as a hydraulic booster is in a predetermined operating state.

[0002]

[Prior art]

 A hydraulic crimping device (working device) used when crimping parts is supplied with high-pressure secondary pressure oil generated by a hydraulic booster to the crimping head, and by operating it, it is sandwiched between the crimping heads. The parts can be crimped with very large force.

By the way, in such a hydraulic pressure bonding apparatus, as shown in FIG. 3, the pressure of the secondary pressure oil supplied from the hydraulic booster to the pressure bonding head reaches a predetermined high pressure (a predetermined operating state). A pressure detector (operating state detection device) 31 that detects this and outputs a detection signal is provided. When the pressure detector 31 detects that the secondary pressure has reached a predetermined high pressure and a detection signal is output, the controller 32 receiving the detection signal causes the secondary pressure in the hydraulic booster. Drain the pressure oil so that the crimping force of the crimping head does not increase further. As a result, the crimping work can be repeated any number of times with the preset crimping force.

[0004]

[Problems to be solved by the device]

 However, in such a hydraulic crimping device, the signal line connector 33 connecting the pressure detector 31 and the controller 32 may be disconnected, and the signal line may be disconnected. In this case, since the detection signal is not input to the controller 32 even if the pressure detector 31 detects a predetermined high pressure state, the secondary pressure oil is supplied to the crimping head at the maximum secondary pressure of the hydraulic booster. It is performed until the high pressure corresponding to the boosting capacity is reached, and the crimping force of the crimping head may greatly exceed the set crimping force. In addition, a short circuit may occur inside the pressure detector 31 and a detection signal may be output from the pressure detector 31 even if the pressure is not in a predetermined high pressure state. In some cases, it may not be possible to generate sufficient crimping force.

The present invention has been made in view of such circumstances, and when an abnormality such as a disconnection or short circuit occurs, a signal indicating that fact is output to prevent a malfunction of the work device. It is an object of the present invention to provide an operating state detection device for a working device that is made possible.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the operating state detection device of the present invention outputs a first detection signal when the working device is not in a predetermined operating state, and outputs a first detection signal when the working device is in a predetermined operating state. It has a detection signal output section that outputs two detection signals. Further, when either one of the first detection signal and the second detection signal is output from the detection signal output section, a determination signal indicating that the detection signal output section is normal is output, When both the 1st detection signal and the 2nd detection signal are output, and when both the 1st detection signal and the 2nd detection signal are not output, there is an abnormality in the detection signal output section. It also has a determination signal output unit that outputs a determination signal indicating that.

[0007]

[Action]

 In such an operating state detection device, the first detection signal and the second detection signal output from the detection signal output unit are once input to the determination signal output unit, and the determination signal output unit outputs either one of the detection signals. If only the input signal is input, it is assumed that there is no abnormality such as disconnection or short-circuit in the detection signal output section, and a judgment signal indicating that the detection signal output section is normal is sent to the controller that controls the operation of the work equipment. Output. On the other hand, if both detection signals are input to the judgment signal output part or if none of the detection signals are input, it is considered that an abnormality such as disconnection or short-circuit has occurred in the detection signal output part. Is output to the controller, etc., to control the operation of the work equipment.

[0008]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a hydraulic crimping device 10 having an operating state detecting device according to the present invention. The hydraulic pressure bonding device 10 is composed of a pressure bonding head 11 and a hydraulic booster 12. The crimping head 11 is provided with a crimping portion 11a that can be opened and closed freely. The hydraulic booster 12 boosts the primary pressure oil (low pressure oil) supplied from a hydraulic pressure source (not shown) to a predetermined high pressure, and supplies the boosted secondary pressure oil to the crimp head 11. The crimping portion 11a of the crimping head portion 11 which has been supplied with the secondary pressure oil can crimp the object sandwiched therein with extremely strong force.

With the hydraulic crimping device 10 configured as described above, the uniform crimping work cannot be repeated if the crimping force is different each time the crimping is performed. For this reason, the hydraulic pressure bonding device 10 is equipped with the pressure detecting device (operating state detecting device) 20 and the controller 15 according to the present invention. As shown in FIG. 2A, the pressure detection device 20 includes a detection signal output switch 21 and a determination signal detection unit 22. The switch 21k of the detection signal output switch 21 is connected to the upper-side terminal 21a when the hydraulic pressure of the secondary pressure oil supplied from the hydraulic booster 12 to the crimping head 11 has not reached a predetermined high pressure (a predetermined operating state). Contact. At this time, the detection signal output switch 21 outputs the first detection signal from the upward moving terminal 21a. On the other hand, when the hydraulic pressure of the secondary pressure oil reaches a predetermined high pressure, the switching element 21k switches and contacts the lower moving side terminal 21b. At this time, the lower detection side terminal 21b outputs the second detection signal.

Signal lines 25 and 26 extend from the upper moving side terminal 21a and the lower moving side terminal 21b, and these signal lines 25 and 26 are connected to a judgment signal detecting section via a connector 27 attached to the tip. It is connected to 22.

The determination signal detection unit 22 is composed of an electric circuit to which an Exclusive-OR circuit is applied. That is, the determination signal detection unit 22 is provided with the first input terminal a and the second input terminal b which are the input terminals of the Exclusive-OR circuit, and the first output terminal E1 which is the same output terminal. The upper input terminal 21a of the detection signal output switch 21 is connected to the first input terminal a via the signal line 25, and the detection signal is connected to the second input terminal b via the signal line 26. The lower terminal 21b of the output switch 21 is connected.

Further, a second output terminal E2 connected to the second input terminal b 1 is provided as an output terminal separate from the Exclusive-OR circuit. The first output terminal E1 and the second output terminal E2 are connected to the controller 15 respectively. The controller 15 determines whether the detection signal output switch 21 at that time is normal or abnormal according to the signals (judgment signals) output from the output terminals E1 and E2, and the hydraulic booster 12 Control the operation of.

[0013]

[Table 1]

First, until the secondary pressure oil of the hydraulic booster 12 reaches a predetermined high pressure, the detection signal output switch 21 is set to the upward movement side terminal 21a, and therefore the determination signal detection unit 22 The first detection signal is input only to one input terminal a (a = 1, b = 0). At this time, the determination signal is output only from the first output terminal E1 of the determination signal detection unit 22 (E1 = 1, E2 = 0). Based on the determination signal, the controller 15 determines that the detection signal output switch 21 including the connection of the connector 27 is normal and causes the hydraulic booster 12 to continue the boosting operation of the secondary pressure oil.

Then, when the pressure of the secondary pressure oil reaches a predetermined high pressure, the detection signal output switch 21 is switched, and the second detection signal is input only to the second input terminal b (a = 0, b = 1). At this time, the determination signal is output from both the first output terminal E1 and the second output terminal E2 of the determination signal detection unit 22 (E1 = 1, E2 = 1). The controller 15 determines that the detection signal output switch 21 is normal based on the determination signals, causes the hydraulic booster 12 to drain the secondary pressure oil to the oil tank T, and returns the pressure portion 11a to the open state. Let

On the other hand, when the detection signal is not input to either the first input terminal a or the second input terminal b of the determination signal detection unit 22 (when a = 0 and b = 0), any output No determination signal is output from the terminals E1 and E2 (E1 = 1, E2 = 1). At this time, the controller 15 determines that the connector 27 is disconnected, as shown in FIG. 2 (B). Furthermore, when each detection signal is input to both the first input terminal a and the second input terminal b (when a = 1 and b = 1), the determination signal is output only from the second output terminal E2. (E1 = 0, E2 = 1). At this time, the controller 15 determines that the inside of the connector 27 or the inside of the detection signal output switch 21 is short.

The controller 15 that has determined that the connector 27 is disconnected or short-circuited in this manner displays an error message to that effect on the error indicator 28, and indicates that the secondary pressure oil in the hydraulic booster 12 has been increased. regulate. As a result, it is possible to prevent the situation in which the secondary pressure oil rises too much and damages the object to be crimped, and the situation in which the secondary pressure oil is insufficiently pressed due to insufficient pressure of the secondary pressure oil.

In the above embodiment, the case where the operating state detecting device according to the present invention is applied to the hydraulic crimping device has been described, but the operating state detecting device according to the present invention is also applied to other operating devices. It is possible to

[0019]

[Effect of device]

 As described above, the operating state detection device of the present invention includes the detection signal output section that outputs the detection signal when the working device is not in the predetermined operating state or in the predetermined operating state. The controller that controls the work device according to the operating state of the work device from the determination signal output unit, considering that both detection signals are not output and both detection signals are output as an abnormal condition. For example, a judgment signal is output to judge the fact. Therefore, it is possible to properly control the working device while allowing the controller or the like to judge whether or not the operating state detection itself is appropriate.

[Brief description of drawings]

FIG. 1 is a schematic view of a hydraulic crimping device including an operating state detecting device according to the present invention.

2A and 2B are configuration diagrams of the operating state detection device.

FIG. 3 is a configuration diagram of a conventional operating state detection device.

[Explanation of symbols]

 10 Hydraulic Crimping Device 11 Crimping Head 12 Hydraulic Booster 20 Pressure Detection Device (Operating State Detection Device) 21 Detection Signal Output Switch 22 Judgment Signal Detection Section 27 Connector

Claims (1)

[Scope of utility model registration request] 1. An operating state detection device for detecting whether or not a working device is in a predetermined operating state, wherein the working device outputs a first detection signal when the working device is not in the predetermined operating state. Of the first detection signal and the second detection signal from the detection signal output unit, which outputs a second detection signal when the working device is in a predetermined operating state. When one of them is output, a determination signal indicating that the detection signal output unit is normal is output, and when both the first detection signal and the second detection signal are output, and When both the first detection signal and the second detection signal have not been output, the determination signal output unit outputs a determination signal indicating that the detection signal output unit is abnormal. Working state of working equipment Detection device.