JPS59125012A - Contact distance sensor - Google Patents

Abstract

PURPOSE:To eliminate position shift in the (x) direction, which is caused by a displacement in the (y) direction of a contact by providing a rotation detection for detecting a rotation of a link by pressure, on a substrate or a link mechanism. CONSTITUTION:Base part links 12, 13 of a link mechanism 11 are fitted so as to be freely rotatable, respectively, to a base plate 10 to be fitted to a moving wheel, etc. The third link 14 is fitted to the tip so as to be freely rotatable, and a contact 15 formed by a small roller which is freely rotatable is fitted to the tip of said link 14. A rotation detector 16 such as a potentiometer or an encoder, etc. for detecting a rotation of the base part link 13 is provided on the base part 10, and a reset spring 17 is extended to the base part link 13. The link mechanism 11 has a link mechanism by which the contact 15 moves linearly when a pressing force in the direction as indicated with an arrow operates on the contact 15. The contact 15 (a point P) draws a locus, and executes a linear motion approximately in the operating range as a contact distance sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sensor that is installed on a moving vehicle or the like and measures the contact distance when it comes into contact with a guide or equipment on a running surface.

Conventionally, as a contact distance sensor for a moving vehicle, as shown in FIG. There is a known device in which the rotation of the arm is detected by a dial/sillometer 5 to adjust the contact distance to the needle side. This type of contact distance sensor is superior to methods that use ultrasonic waves in that the structure of the sensor is extremely simple, but as can be seen from Figure 1,
The arm 2 rotates due to contact with the guide 4 (the contact 3
When the contact point 3 sinks toward the body 1 by an amount y, the contact position of the contactor 3 with respect to the guide 4 shifts by an amount of I can't.

The present invention aims to provide a contact pressure of ~L7/te that eliminates the positional shift in the X direction due to the displacement of the contact in the y direction.

Accordingly, in the contact distance sensor of the present invention, the base link of a link mechanism having a link with a contact attached to the tip thereof is rotatably attached to a substrate, and the link mechanism is suppressed by a suppressing action on the contact. The present invention is characterized in that it has a link structure in which the contact moves linearly, and that a rotation detector for detecting the rotation of the link due to the suppression of the contact is provided on the substrate or the link mechanism.

Embodiments of the present invention will be described in detail below with reference to one drawing.

FIG. 2 shows a first embodiment of the present invention, in which a base link 1 of a link mechanism 11 is mounted on a base plate 10 that can be attached to a mobile vehicle or the like.
A sixth link 14 is rotatably attached to the tips of these base links 12 and 13, and a contact check 5 formed by a small rotatable roller is attached to the tip of the link 14. is installed. The board 10 also includes a rotation detector 16 such as a potentiometer or an encoder for detecting the rotation of the base link 13.
Further, a return spring 17 is stretched between the substrate lO and the base link 13.

In addition, in the figure, 18 is a stopper.

The link mechanism 11 configured in this way is configured such that when a suppressing force acts on the contact 15 in the direction of the arrow, the contact 15
Specifically, in FIG. 3, which schematically shows the link mechanism 11, the link mechanism 11 is configured to maintain the relationship of countersunk door CI) UP. In this case, contact 15
(2 points) draw a locus as shown by the dotted line, and therefore approximately linear movement can be performed within the operating range of the sensor based on the contact distance.

In addition, in the first embodiment, compared to other embodiments described below, the link mechanism does not have an ika-like sliding part, and therefore, its operation can be performed extremely smoothly.

FIG. 4 shows the configuration of a second embodiment of the present invention, in which the base end of the base link 220 in the link IfA structure 2 is attached to a pin 22α so as to be rotatable in multiple directions, and The base end of the base link path No. 2 is rotatably attached to the slidable slider 24α in a sliding groove provided on the substrate, and the base end of the base link path and the vicinity of the base end of the base link 220 are attached. are connected by a connection link 25 rotatably attached to each, and a fourth link 26 is rotatably attached to the tip of the base links n and 23, and these links form a parallelogram-shaped link. A contactor 27 is attached to the tip of the fourth link 26. Further, a rotation detector array for detecting the rotation of the base link n is provided on the base plate 20, and a return spring 29 for holding the slider 24a at the base end of the base link 230 on the tip side of the sliding groove is installed on the base link n. 22 and the substrate 20.

Of course, when the link mechanism 21 t'i and the contact 27 are pressed in the direction of the arrow, the contact 27 is moved linearly.

In the fifth embodiment shown in FIG. 5, the links in the second embodiment are arranged symmetrically, that is, the base links 32 and 32 of the link mechanism 31 are placed at the same position on the board 30, respectively.
33 is rotatably attached, and the base end of 350 is rotatably attached to the slider %α that is freely slidable within the sliding groove blade, and the base ends of those links 34 and 35 and the base The proximal ends of the links 32 and 33 are rotatably connected by connection links 37 and 38, respectively, and links 39 and 40 are rotatably attached to the tips of the base links 32 and 34 and 33 and 35, respectively. The tips of the links 39 and 40 are rotatably connected, and a contact 41 is attached thereto.

In addition, in the figure, 42#i link 32 and the board 3 of Fi33
A rotation detector 43 detects rotation relative to zero, and 43 is a return spring.

In the fourth embodiment shown in FIG. 6, the slider is moved linearly by a link mechanism 51 constituting a pantograph mechanism, and base links 52, 5 are placed at the same position on a base plate 50.
3 are rotatably attached, and their base links 52
, 53 are rotatably connected to second base links 54 and 55, and these base links 5a.

55 are rotatably connected at an intermediate portion 56, and the intermediate portion 56 is slidably fitted into a sliding groove 57 of the substrate 50, and links 58 and 59 are provided at the tips of the base links 54 and 55, respectively. are rotatably attached, the tips of their links 58 and 59 are connected, and a contact 60 is attached thereto. In the figure, 61 is a rotation detector that detects the rotation of the base link 52 and Fi 53, and 62 is a return spring.

In the fourth embodiment, it is clear that when the contact 60 is pressed in the direction of the arrow, the link mechanism 51 constituting the pantograph mechanism causes the contact 60 to move linearly.

This embodiment has the advantage of a simpler structure than the second and sixth embodiments, but the movable range of the contact is small relative to the amount of protrusion of the board, and conversely, the second and sixth embodiments have a simpler structure. , the third embodiment has the advantage that the range of movement of the contactor can be relatively large.

As is clear from the detailed description above, according to the present invention, since the contact always moves linearly, there is no occurrence of lateral displacement depending on the amount of displacement of the contact.
Accurate contact distance detection can be performed at all times.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of a conventional contact distance sensor, FIG. 28 is a perspective view of the first embodiment of the present invention, FIG. 3 is a schematic explanatory diagram of the link mechanism of the first embodiment, and FIGS. FIG. 6 is a perspective view of another different embodiment of the invention. 10, 20, 30, 50・φ・Substrate, 11, 2
1, 31, 51φ... link mechanism, 12, 13
, 22 , 23 , 32 - 35 , 52 - 55 @ base link, 14 , 26 , 39 , 40 , 58 ,
59 @・e-link, 15, 27, 41, 60・
9. Contacts, 16, 28, 42, 61e--Rotation detector. Figure 1 Figure 2 Figure 2. Figure 3 / 1 / 1 / Il1 1 / 17') / Happy 4 Figure

Claims (1)

[Claims] 1. The base link of a link mechanism having a link with a contact attached to the tip is rotatably attached to a board, and the link mechanism has a link structure in which the contact moves linearly by a suppressing action on the contact. constituted as having
A contact distance sensor, characterized in that a rotation detector for detecting rotation of the link due to suppression of the contact is provided on the substrate or the link mechanism.