JPS59125011A - Contact distance sensor for moving body - Google Patents

Abstract

PURPOSE:To move back a sensor in accordance with a press contacting force and to prevent the sensor from being damaged, by fitting the second arm to the tip of the first arm, operating an energizing force of a reset spring for holding it at a projecting position to the outside, also providing a sliding piece on its tip, and detecting a rotational angle of the arm. CONSTITUTION:The second arm 16 provided on the tip of the first arm 12 so as to be freely rotatable is provided with a sliding piece 17 formed by a roller of its tip. Also, connecting links 18, 19 connected so as to be freely rotatable are attached pivotally between the tip of said second arm 16 and the intermediate position of the first arm 12. A parallelogram-shaped link mechanism is formed by these links 18, 19 and the arms 12, 16. This sensor is provided with a rotation detector 22 such as a potentiometer, etc. for executing a measurement of a rotational angle of the second arm 16 by detecting a rotational angle of the connecting link 19. Also, a rotation detector 23 for detecting a rotational angle of the first arm 12 is provided on a substrate 11. As for the first reset spring 14, that which is stronger than the second reset spring 21 is used, and when a contact 17 contacts with an object, the second reset spring 21 expands and the contact 17 moves back.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact l#tlfc sensor that is attached to a moving object such as a vehicle and measures the contact distance when it comes into contact with a traveling guide or various equipment on a traveling surface. It is something.

A contact distance sensor as illustrated in FIG. 1, that is, a moving object 1
A contactor 4 is provided at the tip of an arm 3 that rotatably protrudes from a support point 2, and an angle detector 5 detects the rotation angle of this arm 3.
By using a contact distance sensor configured to detect the distance, it is possible to easily measure the distance between the moving object 1 and the object 6 that the contactor 4 has contacted, such as a traveling guide, various equipment on the traveling surface, or an obstacle. It can be determined by simple calculations.

However, with the arm 3 at the contact distance center being perpendicular to the object stone such as a travel guide, the movable body 1 moves in the longitudinal direction of the arm 3 and brings the contact 4 into contact with the object 6. If no force is applied to rotate the arm 3 around the support point 2, as in the case of
The arm 3 may break due to buckling, resulting in damage to the sensor.

The present invention solves these problems and makes it possible for the contactor to retreat in accordance with the pressing force even if a pressing force is applied to the contactor from any direction, thereby preventing damage to the sensor. It is something.

7. The contact distance increaser for a moving body of the present invention has a first arm rotatable in only one direction on a substrate and held in an outwardly protruding position by a first return spring. and a second arm rotatable at the tip of the first arm in a direction opposite to the direction in which the arm can rotate with respect to the substrate within a range that is not aligned linearly with the first arm. At the same time, a second return force is applied to the second arm to hold it in the outwardly protruding position, and a slider is provided at the tip of the second arm, and a slider is provided on the tip of the second arm. Second
The % sign is that a rotation detector is provided to detect the rotation angle of the arm.

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

FIG. 2 shows a first embodiment of the invention.

In this contact distance sensor, a first arm 12 is rotatably attached to a substrate 11 attached to a moving body JO such as a vehicle. Further, the board 11 is provided with a stopper 13 that brings the arm 12 into contact with the arm 12 at a position protruding perpendicularly from the movable body. A first return spring 14 that applies a biasing force is tensioned, thereby making the first arm 12 rotatable only in one direction (the 11th direction), and allowing the first arm 12 to rotate outward vertically. It is held in a protruding position.

The second arm 16 rotatably provided at the tip of the first arm 12 is provided with a slider 17 formed by a rotatable roller at its tip, and the second arm 16 is provided with a slider 17 formed by a rotatable roller. Rotatably connected connecting links 18, 1.9 are pivotally connected between the intermediate position of the arm 12, and these links 1.8, 19 and the arms 12, 16 form a parallelogram-shaped link mechanism. is formed.

The first arm 12 is provided with a stopper 20 for restricting the rotation of the connecting link 19, thereby causing the second arm 16 to rotate in a direction opposite to the direction in which the first arm 12 can rotate (in the counterclockwise direction). ), the range of rotation is limited to a range in which the second arm 16 is not oriented linearly with respect to the first arm 12, and the connection link 19 and the first arm] A second return spring 21 is stretched between the second arm 16 and the second arm 16 to apply a biasing force to the second arm 16 to hold it in the outward protruding position where it abuts the stopper 20. . Furthermore, the first arm 12
A rotation detector 22 such as a potentiometer is provided on the top to measure the rotation angle of the second arm 16 by detecting the rotation angle of the connecting link [9]. Rotation detector 23 that detects angle
has been established.

In the "contact distance center" having the above configuration, the first return spring 14 is stronger than the second return spring 21, so that normally when the contact 17 comes into contact with an object, the second return spring 2 ] extends and the contact 17 retreats,
Based on the rotation angle of the second arm 16 detected by the rotation detector 22, the contact distance can be measured by a simple calculation in an arithmetic circuit.

When the contactor 17 contacts an object, it is unclear from which direction the pressing force acts on the contactor 17, but no matter which direction it acts from, the contact distance sensor will be damaged. There's nothing like that.

For example, in response to a force from the direction indicated by the arrow α, the second arm 16 extends the second return spring 21 and retreats as described above, and the force from the direction already indicated by the arrow causes the second arm 16 to move backward. When the arm 16 is not rotated simultaneously in the counterclockwise H1° direction, the first arm 12 extends the first return spring 14 and rotates to the pivot point relative to the substrate 11, thereby preventing damage. Ru. In this case, the needle side of the contact distance can be determined based on the eye size. .

The second embodiment of the present invention shown in FIG. 3 is adapted to cope with large displacements of the contact, and similarly to the above embodiment, a first arm 32 is attached to a base plate 31 attached to a movable body 30 so as to be rotatable. However, when this arm 32 is brought into contact with the stopper 33 by the first return spring 34, the arm 32 does not become perpendicular to the moving body, but is given an appropriate inclination. ing.

A rotation detector 43 such as a potentiometer is provided on the substrate 31 to detect the rotation angle of the first arm 320 relative to the substrate 31.

Further, the second arm 36 rotatably provided at the tip of the first arm is connected to the connecting link 3 by a second return spring 41.
9 comes into contact with the stopper 40 L7, the second arm 36 is formed so as to be tilted in the opposite direction to the first arm 32, and further, when the contact 37 comes into contact with the object and is pressed, the second arm 36 A stopper 44 is provided on the first arm 32 to limit further tilting of the second arm 3G when it is similar to the first arm 32 to some extent. The rotation angle of the second arm 36 is detected by a rotation detector 42 provided on the first arm 32, as in the previous embodiment.

According to the contact distance sensor of this second embodiment, the contact 37
As in the previous embodiment, no damage occurs even if a pressing force is applied from any direction to the contactor 37. However, in this second embodiment, the contactor 37 is rotated against small displacement due to the pressing force. The detector 42 corresponds and the second arm 36 corresponds to the stopper 4.
4, the first arm 32 will extend the return spring 34 and rotate, and the displacement will be detected by the rotation detector 43.

As is clear from the detailed description above, C2. According to the contact distance sensor of the present invention, there is no risk of damage to the contact even if a pressing force is applied from any direction to the contact.
Moreover, since the contact distance sensor is constructed by a link mechanism, the construction is simple and at the same time it can be operated stably.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional contact sensor, and FIGS. 2 and 6 are plan views showing different embodiments of the present invention. 11, 31... board,' 12, 32-@-first
arm, 14.34--first return spring, 16, 36--second arm, 17--slider,
21, 41... Second return spring, 22, 42, 43... Rotation detector.

Claims (1)

[Claims] J. A first arm is provided on the board, which is rotatable in only one direction and held in an outwardly protruding position by a first return spring, and at the tip of this first arm, the arm is positioned relative to the board. a second arm rotatable within a range that is not oriented in a straight line with said first arm in a direction opposite to that in which it can be rotated; A slider is provided at the tip of the second return spring, and a rotation detector is provided on the first arm to detect the rotation angle of the second arm. A contact distance sensor for moving objects featuring: