JPS58151502A - Position detecting device - Google Patents

Abstract

PURPOSE:To reduce variations of measuring pressure by the direction at the time of contact of an electrode contact, by constituting so that the electrode contact is held by 2 holding members, and one contact face of the holding member makes a concentrical circle with the electrode contact. CONSTITUTION:An electrode contact 21 is fitted to one end of a stylus, and the other end of the stylus 22 is fixed to the first holding member (disk 23) in a housing 26. On the bottom face of the disk 23, 3 spherical bodies 24 are provided on positions which are divided into three almost equally. On the bottom part of the housing 26, the second holding member 25 is provided, and the circle 24 and the second holding member 25 are made to press-contact by a spring 28. The contact face makes a concentrical circle with the electrode contact 21. On the housing 26, a cover 27 is provided and a shank 29 is fitted, and through the shank 29, a position detecting device is installed to a machine tool, etc. As for a position relation of the spherical body 24, and the spherical member 25, a stable position is obtained even if they are fixed to one point, and the position can be detected exactly even if there is a stick slip.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the holding mechanism of a stylus having a three-dimensional position sensing wire and an electrode contact at one end thereof.

As is well known, in the machine tools of the I11 type, it is becoming more and more important to measure the three-dimensional dimensions of the workpiece after machining. For this reason, conventionally, for example, five position detection devices as shown in Figs. (·Ta.

In FIGS. 1 and 2, reference numeral 11 denotes an electrode contact made of a conductive sphere, which is provided at one end of the filar, and its holding mechanism 411 is constructed as follows.

That is, in the housing 1, the filler 12
The members 6, 7.8 of the receiver are held and fixed to the disc 4 via the insulating plate 5.

The bottom sK of the housing 1 is divided into approximately three equal parts by a ball #-.
A set screw 3 having a diameter of 2 is provided. The ball is shaped like a K so that the receiver is in contact with the members 6, 7.8, and the spring IO
A pressing force is applied from K through the insulating member 9, and the two are pressed together.

14 is a lock screw for locking the set screw 3.

The position detection device having the above-mentioned configuration is attached to the machine tool 14 by the shank 13, for example, as shown in FIG. jii! i 16 K is detected visually, and the position etc. is detected.

However, in the configuration of the conventional device described above, as is clear from Figure 11112, the receiver is a member! , 7.8 shape as a cone, V
@, flat-, and by making each contact with each sphere 2,
The trap is set at 111m, which is the only stable position in three dimensions.

Due to flaws, there are many variations in the measured pressure depending on the direction when contacting the electric contactor, and the number of parts increases.
The IIi recorder had the disadvantage that the parts were processed 4 hours using steel, which required a lot of man-hours and increased costs.

The present disclosure was made in order to solve the drawbacks of the prior art.
It is characterized in that it is held from 1 mK, and the ridge contact of one of both holding members is 5KIII so that it forms a concentric spherical shape with the electrode contact.

The present invention will be described with reference to the following embodiments:
ll4aiil(-, in (b), the electrode contactor 4 is attached to one end WcklL of the stylus n, and the stylus η
The other end of is fixed. On the bottom of the disk, three spheres are placed at roughly equal thirds. A second holding member 6 is disposed at the bottom of the housing, and the bulb and the second armpit holding member are pressed together by a spring 28, and the contact surface of the holding member is connected to the electrode contact m as shown in the figure. It has a concentric spherical shape.

Further, the housing 26 is provided with a lid n, and a shank is attached to this lid 27, and as described above, the position detecting device of the present invention described above is operated through the shank as shown in FIG. As shown, it is attached to machine tools such as n.

Figure 5 shows an example of the contact position detection circuit used in the present invention, in which the leads @31, 32 from the connector (materials) and the lead wires from the table part on which the workpiece is placed are extended.
9 input KII are connected. The output of the multiplier g is connected to the excitation relay * * 3B', and the power supply island is connected to the lead of an alarm device such as a lamp or buzzer and to the counter 41 via the relay pad.

Now, when the machine tool table head 41 is moved vertically and horizontally in the direction of the arrow and the electrode contactor 4 approaches and contacts one end of the workpiece, the input of the amplifying fiF 37 closes. The relay is activated by its output, thus energizing the annunciator and detecting the point of contact quickly and accurately. Also, since input is given to the counter 41 at the same time, the cough force (more than the counter 41v)
Zero Niri Ryuuto, and from this point count vli! Once started, you can know the distance traveled by the table or spindle.

In the above embodiment, the arrangement of the disk 23E and the sphere may be reversed from that in FIG. 4, as shown in the wLs diagram.

In the series 6aii, Figure 114 and the reference numeral 4 refer to 41 members, the lower part of the disc 2' is shaped like a sphere concentric with the electrode contactor, and the three spheres are arranged in the housing so as to be in contact with this. 21mK retention has been identified.

That’s 1! As is clear from #, the structure of the present WAK is simple, and the positional relationship between the sphere in the housing and the single-centered sphere-S material that is in contact with it is not constant at one point.
Since a stable position is ensured, the number of parts can be reduced, and furthermore, even if there is a stick slip due to friction between the sphere and the member, it has no relation to the position of the electrode contactor, so accurate position detection can be achieved.

[Brief explanation of drawings]

jlli#! J (a), (- is a schematic diagram showing an example of a conventional position detection device, Figure 2 (B) is an irises 1 diagram (-)
A- and H-B @ arrow views, FIG. 3 is a block diagram showing an example of a position detection circuit using this conventional V&pupil, I! Figure 4 (
a), (b) are schematic diagrams showing one embodiment of the present invention, i@
FIG. 5 is a block diagram showing a position detection circuit using this embodiment, and FIG. 6 (b) is a block diagram showing another embodiment of the present invention. 21... Electrode contactor, η・・・Stylus, ・・disc, ・・・sphere, ・・・housing. Patent applicant: Sony Magnescale Co., Ltd. Daisan, Patent attorney, Mizu 1) Takeshi Part 3, Figure 1 (0) (b) A Figure 2 (0) Figure 6 Procedural amendment 1 Indication of the case Showa riot 1 Tatami permission application No. S511 No. 3 Person making the amendment Relationship with the case Tatami permission Nescale Co., Ltd. 4, Agent〒
105 Address: Shiba 3-chome Building 5, 3-2-14 Shiba, Minato-ku, Tokyo Subject of amendment (1) Application @ Specifications page 1114 line 11 r32J t
'AII is divided. (ri) Delete "41" in the first line of page 5 of the same book. Figure 6 Patent Office Director Otoshima - I# Mari-dono 1 Display of the case Showa riot 1 year Tatami Khoho No. 811 (No. 14 2-10 Sensitive position machine - device 3 Person making amendment Relationship with the case Tatami Applicant Address Name: Sosho-Malnescale Co., Ltd. 4, Agent:
105 Address: Shiba 3-chome Building 5, 3-2-14 Shiba, Minato-ku, Tokyo Subject of amendment: Detailed purchase of Hosoro's m- (1) Book m-edited on page S, line 16 Add the following gambling phrase to the cabinet with the 17th bank. [In addition, in Tsuru 4m1, the sphere and the $12 holding member 6,
In Figure 6, the contact surface between the disk 2 and the sphere S' is m-, which is close to the inside of the sphere.
Or, by approximating with one bell, [#tFi-1 can be obtained with certainty. ” (2) 1i1j [pleasure14fi r23'J, ai
Press "S" in line 15 with "K" and "24'" K@, respectively. Procedural amendment (c) 1 Indication of the case 1985 Tatami Permit - No. 85504 2 Akiaki's name position detection device 3 Relationship with the case of the person making the amendment Tatami Permit - Person's Address Name Nonie Madane Scale Co., Ltd. 4 Agent〒10
5 Address: Shiba 3-chome Building, 3-2-14 Shiba, Minato-ku, Tokyo June 89, 1939 (shipping date) 6 Subject of amendment Page 6, line 1 to line 13 of the specification of the present application [Figures, FIG. 6 is a schematic diagram showing another embodiment of the present invention. ”.

Claims (1)

[Claims] (1) Two holders, i
1. A position detection device characterized in that the device is held by an L material, and one of the holding members is configured such that one of the holding members is in a concentric spherical shape with the electrode contactor. The position detecting device according to claim 1, wherein the front side of the holding member is made up of 311 spheres, and these spheres are in contact with the concentric spherical surface.