JPS60123710A - Body detecting apparatus - Google Patents

Abstract

PURPOSE:To ensure the operation at a high temperature, by forming a plurality of opening holes in a cylinder, which contains a piston, which is attached to the upper end parts of a plurality of probes that are contacted with a body, and providing pressure detectors between the opening holes and a pressurized air feeding mechanism. CONSTITUTION:A piston 2, which is attached to the upper end of a probe 1 that is contacted with a body 31, is contained in a cylinder 3, so that the piston can be moved up and down. Opening holes 6 and 7, which are formed in the axial direction of the cylinder 3, are connected to an air feeding mechanism 10 through copper pipes 8 and 9. Pressure detectors 11 and 12 are provided in the pipes 8 and 9. The piston 2 is energized to the side of the body 31 by a spring 5. Thus, the probe 1 is directly contacted with the body 31, and the movement is detected by the fluctuation of the air in the pipes 8 and 9. Therefore the effect of the dust and the like in a high temperature atmosphere is not received.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an object detection device that detects the position, shape, etc. of an object.

In general, electric type,
Sonic and optical types are known. In other words, the electric type detects the position, shape, etc. of an object by using current short circuits caused by contact, changes in capacitance, and changes in electromagnetic field, while the sonic type uses ultrasonic waves. The optical type used is one that uses laser light or infrared rays1. However, these detection devices1 are sensitive to high temperature atmospheres (usually used at temperatures below 50°C) and are sensitive to heat, dust, smoke, etc. There was a risk of malfunction due to steam, etc.

The present invention has been made based on the above points, and its purpose is to provide a highly reliable object detection device that operates reliably even at high temperatures and under 11 tfE.

That is, the object detection device according to the present invention includes a plurality of stylus that directly contacts an object, a piston attached to the upper end of each of the stylus, a cylinder that accommodates the piston so as to be able to move up and down, and a cylinder that accommodates the piston so as to be movable up and down. A plurality of openings formed in the axial direction of The sensor is equipped with a detector that detects pressure fluctuations caused by the piston being inserted and the piston rising to close the opening (one step).

Below: 1< An embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram schematically showing the configuration of the object detection device according to the present embodiment, and reference numbers i' and 'f 1 in the figure indicate the stylus that comes into contact with the object 3). A bistos 2 is attached to the upper end of the stylus 1, and the piston 2 is housed in a cylinder 3 so as to be movable up and down. A mold-shaped support portion 4 is provided below the cylinder 3 of the stylus 1, and a spring 5 is mounted between the support portion 4 and the cylinder 3. The stylus 1 is forced to the side of the object 31 by this suture ring 5. 1jrl[T, I6 and 7 are formed at predetermined positions in the axial direction of the cylinder 3. Copper tubes 8 and 9 are connected to these openings 6'' and 7, and pressurized air (for example, The copper pipes 8 and 9 are connected to the copper pipes 8 and 9.
A detector 11.12 is inserted in 1, and this detector 11.12 consists of, for example, an air microswitch, a pressure switch or a fluid element. That is, when the stylus 1 comes into contact with the object 31 while pressurized air is constantly supplied into the cylinder 3 from the air supply mechanism 10, the piston 2, which is integrally attached to the stylus 1, rises and closes the opening 6. 7 will be closed one after another. Due to the blockage of the openings 6 and 7, the pressure inside the copper tubes 8 and 9 changes, which is detected by the detectors 11 and 12.
The configuration of the object detection device is 9 or above, which is the configuration for detecting by the automatic marking device 11.
applied to.

FIG. 2 is a front view of the automatic marking device, and FIG. 3 is a view taken along the arrow [1-III in FIG. 2. Reference numeral 21 in the figure indicates a moving mechanism, and a turning mechanism 22 is provided above the bar 21 of the moving machine 4'. A moving mechanism 23 is provided above the turning mechanism 22, and a two-axis moving mechanism 24 is further provided above it. The moving mechanism 23 includes an arm 2
The marker holder can be accessed through 5.

As shown in FIG. 4, the marker holder roof has a structure of 10. That is, the reference numeral 28 in the figure indicates a chucking machine that selectively holds the chalk 27 as a marker.
A cylinder 49 IFt 29 is provided on one side of this chucking 4't2'17')28. This cylinder mechanism 29 causes the chucking mechanism 28 to move up and down along the guide rail 30, and the choke 2
7 to apply a pressing force ((l pressure) to the object to be marked 31k. In addition, the reference numeral 32 in the figure indicates a paranza mechanism that does not balance the weight of the chucking mechanism 28, and the reference numeral 32 indicates an object detection device. show.

The object detection device described above has a configuration in which four units of the configuration shown in FIG. 1 are attached to a bracket 34 (a fourth
(Only one unit is shown in the figure).

The bracket 34 is configured to move up and down over the guide rod 30 by a cylinder mechanism 35.

The operation will be explained based on the above configuration.

First, in a standby state, a chalk 27 corresponding to the temperature of the object to be marked, 91 A, is inserted and fixed into the chuck 16ti28 of the marker holder 26 from a chalk supply device (not shown). Once the chalk 27 is fixed, the marking location is detected. That is, the turning mechanism 22 turns the device from the standby position to the marking position. At this time, the marker holder is positioned at an upper point in the vertical direction. After turning to the marking position, the two-axis moving machine 24 is operated to lower the marker holder 26 vertically downward at high speed. When the marker holder 26 descends, the stylus 1 comes into contact with the object to be marked 21, which causes the piston 2 to rise inside the cylinder 3 and first close the opening 6. This closure of the opening 6 causes a change in the pressure within the copper tube 8, which is detected by the detector 1 and outputs a detection signal 11i I,' to a control mechanism (not shown). The axial position of the object to be marked 31A can be determined from this detection signal. Further, the lowering speed of the marker holder U is switched from high speed to low speed based on this detection signal. This is to shorten the marking time cycle, and at the same time, reduce the impact caused by the contact 1, 4 of the chalk 27 with the object 31 to be marked, thereby preventing damage to the chalk 27.

Next, distortion measurement near the marking position will be explained with reference to FIGS. 5 and 6. First of all, there are 4 pistons each weighing 21.2B.

Let them be 2C and 2D. As described above, two of the pistons close the opening 6 and rise further, and as shown in FIG. At this time, the other three bis-tons 2B,
2. C and 2D are the objects to be marked 31 as shown in FIG.
The position corresponds to the distortion of the For example, in the case of the piston 213, since the strain of the object to be marked 31A is LH, the piston 213 is accordingly displaced downward by T and B from the piston 2A. The pistons 2C and 2D are similarly displaced. Therefore, each piston 2B...? C,,? The timing at which D closes the open lower portion of each cylinder 3 is determined from the difference in displacement and the descending speed of the marker holder.

Therefore, as shown in FIG. 6, the time difference Δt16. between the detection signals from the respective detectors 12. By measuring Δtc and ΔtD and calculating the relationship between the descending speed of the marker holder 26 and the descending speed of the marker holder 26, it is possible to calculate the distortion: Ln JJCLo, and grasp the state of distortion of the object to be marked 31A near the marking position. can do.

In this case, the piston height I (is used as the limit value of the maximum allowable strain amount. For example, after the piston 2A closes the opening lower, while the lower opens, the other three pistons 2B
L? If even one of C and 2D does not close the open lower piston, it is determined that there is a strain of H or more on the object to be marked 31k and that the maximum allowable strain amount is exceeded.

According to the object detection device 6 according to the actual MII example above, the stylus 1
The object to be marked 31k is brought into direct contact with the object to be marked 31k, and its movement is detected by fluctuations in air pressure connected to the cylinder 3. It will not malfunction due to the influence of heat, dust, smoke or steam, and will not cause any malfunction.
3. Works reliably even under conditions. In addition, by providing four stylus 1 around the choke 27 and detecting the difference in the displacement amount of each stylus 1 through the fluctuation of air pressure, the object to be marked 31f is
Since the distortion of i can be measured in advance, it is possible to judge whether or not marking is possible, for example, and it is possible to reliably prevent damage to the choke 27.

The object detection device according to the present invention is described in detail above.
kl % A plurality of styluses in contact with an object VCi0, a piston with several pistons in the upper part of each of these stylus portions, a cylinder that accommodates the pistons in two lower movement aJ functions, A number of openings are formed in the axial direction, a pressure gas supply mechanism that constantly supplies pressure gas into the cylinder through these openings, and the piston is inserted between the pressure gas supply mechanism and the opening. This configuration includes a detector that detects pressure fluctuations caused by rising and closing the opening.

Therefore, it is possible to provide a highly reliable object detection device that operates reliably even under high temperatures and adverse environments.

[Brief explanation of the drawing]

1 to 6 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a diagram showing a schematic configuration of the object detection device Q, FIG. 2 is a top view of the automatic marking device, and FIG. is ■−■ in Figure 2
4 is a sectional view showing a state in which the object detection device is incorporated into the marker holder, and FIGS. 5 and 36 are views for explaining the operation of the object detection device N. DESCRIPTION OF SYMBOLS 1... Hornworm needle, 2... Piston, 3... Cylinder, 6.7... Opening, 10... Pressure gas supply machine (A,
11゜12...Detector. Figure 5 Cause 63-

Claims (1)

[Claims] A plurality of stylus that come into direct contact with an object, a piston attached to the upper end of each of these styluses, a cylinder that accommodates the piston so as to be able to move up and down, and a plurality of openings formed in the axial direction of this cylinder. and a pressure gas supply mechanism that constantly supplies pressure gas into the cylinder through these openings, and a piston inserted between the pressure gas supply mechanism and the opening, and the piston rises to close the opening. What is claimed is: 1. An object detection device comprising: a detector for detecting pressure fluctuations caused by