JPH0345132Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a stroke measuring device for a reciprocating work shaft, for example, a stroke measuring device for measuring the stroke amount in a tilt mechanism of a column device for an automobile. It is something.

BACKGROUND OF THE INVENTION In a work shaft that reciprocates, such as a tilt mechanism of an automobile column device, it is important to determine whether the stroke start position and stroke amount with respect to the work reference satisfy predetermined standards. If these do not meet predetermined standards, the degree of perfection as a product is reduced. For this reason, it is necessary to measure the stroke start position and stroke amount to prevent the production of defective products.Measuring devices used in such cases measure the detection part after bringing it close to the workshaft at the stroke start position. Then, move the detection part along the workshaft, fix the detection part, and measure the starting point position. Furthermore, the work shaft is operated and the stroke of the work shaft is measured. Two actuators are required for these measurements, one in the horizontal direction and one in the vertical direction.

Problems that the invention aims to solve: As a result, the measurement device becomes complex and has a large number of parts, such as pneumatic parts such as air solenoid valves and flow control valves, limit switches and I/O (input/output parts) for electrical control. Since there are many problems, the device must be expensive, and there is a problem that the failure rate is high.

Furthermore, since it is a complicated device during measurement, it requires highly accurate adjustment, and there is a problem that operation is labor-intensive and work efficiency is poor.

The basic purpose of this invention is to solve the above-mentioned problems, and to provide a stroke measuring device that has a simple structure and is easy to measure.

Means for Solving the Problem That is, this invention includes a movable table that moves back and forth in a direction orthogonal to the reciprocating direction of a reciprocating work shaft, and a movable table that moves freely in the reciprocating direction of the work shaft It consists of a movable detecting section mounted on a stand, and a shaft guide is formed on the tip edge of the movable detecting section to move the movable detecting section in the reciprocating direction by the work shaft fixed to one end of the reciprocating motion. At the same time, a first detection means is provided at a location separated by a predetermined distance from the shaft guide in the reciprocating direction of the workshaft, and is activated by contact with the workshaft. A second detection section is provided that is activated when the work shaft is moved by the guide and the work shaft, and a second detection section is provided between the movable base and the movable detection section when the work shaft contacts the work guide and the movable base is activated. The present invention is characterized in that a fixing means is provided that stops the movement of the movable detection section in the reciprocating direction when the movable detection section moves forward by a predetermined distance.

Effect According to this invention, the tip of the work guide comes into contact with the work shaft located at the stroke starting position as the moving table and the movable detection unit attached thereto move forward. When the movable table and the movable detector move further forward, the work guide follows the workshaft, and thereby the movable detector moves along the stroke direction of the workshaft in a direction opposite to the stroke end point of the workshaft. In this operation, when the workshaft reaches a predetermined position while contacting the work guide, the stop means stops the movement of the movable detecting section in the stroke direction, and the second detecting means measures the starting point position of the work shaft.

Next, when the workshaft is moved to measure whether it has a proper stroke amount or not, if the workshaft has a stroke value greater than or equal to the proper stroke value, it comes into contact with the first detection means and senses this.
If the workshaft has not reached the predetermined stroke value, the workshaft does not come into contact with the first detection means and is not sensed by the first detection means.

Embodiment An embodiment of this invention will be described below based on the accompanying drawings.

As shown in FIG. 4, the object to be measured, for example, an automobile column device 12, is fixed on a fixed base 13 so as to have a constant work reference, and the stroke start position and stroke amount of the work shaft 10 are measured by the measuring device. It will be inspected and measured.

That is, the movable table 1 is placed on a rail 1a so as to be horizontally slidable, and is connected to a piston shaft 2b of a movable cylinder 2a fixed to a vertical wall 2. Sliding shaft 1 vertically installed on this moving table 1
A movable detecting section 3 is inserted through and attached to b so as to be slidable in the vertical direction, that is, in the stroke direction of the work shaft, and a coil spring 4 is interposed vertically between the movable detecting section 3 and the moving table 1. The upward movement of the movable detection unit 3 is stopped by a stopper 1c fixed to the movable table 1. The vertical wall 2a and the moving table 1 are provided with vertically elongated insertion holes 5a, respectively.
A lock shaft is inserted through 5b so as to be movable in the vertical direction. Cylinder 2a of lockshaft 5
A dog 5c that comes into contact with the side surface of the vertical wall 2 on the cylinder 2a side to stop the movement of the lockshaft 5 toward the movable table 1 is fixed to the end of the side surface, and a lock head is attached to the other end of the dog 5c. 5d is formed,
It is locked to the movable detection part 3 in the vertical direction. The base of the lock head 5d is in contact with the inner surface of the movable table 1 to prevent the lock shaft 5 from moving in the vertical direction. The lock head 5d of the lock shaft 5 and the inner surface of the movable table 1 constitute a fixing means. Further, a dog 5e is fixed to the other end of the lockshaft 5 on the side of the cylinder 2a, which abuts against the surface of the vertical wall 2 on the movable base side and stops the movement of the lockshaft 5 toward the cylinder 2a.

The lower part of the tip of the movable detection part 3 has an inclined surface 6a that is inclined upward from the starting point position of the work shaft 10 toward the rear, and the rear part thereof is a horizontal surface 6b.
A work guide 6 is formed, and protrusions 3a and 3b are formed at the upper and lower parts of the rear end of the movable detector 3, respectively. When it moves downward, it comes into contact with the limit switch 7a provided on the moving table 1 and activates it. On the other hand, the protruding piece 3b is the movable base 1
When it moves further downward by a predetermined distance, it comes into contact with the limit switch 7b, which is also provided on the moving table 1, and activates it. These projecting pieces 3a, 3
b and limit switches 7a and 7b constitute a second detection means.

Moreover, in the upper part of the tip of the movable detection part 3,
A rotating member 8 having a shape is rotatably fixed at its bent portion, and a coil spring 9 is attached to the lower edge of the rotating member 8 so as to apply a rotational force in the opposite direction when rotating the rotating member 8 upward. are connected to each other, and the side surface of the lower end of the detection section 8 on the cylinder 2a side is in contact with a limit switch 7c provided on the movable detection section 3. This rotating member 8, coil spring 9, and limit switch 7c constitute a first detection means.

Next, the operation of this embodiment will be explained.

The movable base 1 at point A is pushed forward by the moving cylinder 2a with respect to the workshaft 10 placed at the starting position on the workshaft fixed base 11. At this time, the movable table 1 slides on the rails 1a and moves forward smoothly, and the movable detection section 3 inserted through the sliding shaft 1b of the movable table 1 is moved forward together with the movable table 1. As the movement further advances, the work guide 6 comes into contact with the work shaft 10 placed at the starting position, the inclined surface 6a follows the work shaft 10, and the movable detection part 3 moves downward against the elastic force of the coil spring 4. Moving. At this time, the protruding piece 3a of the movable detection section 3 comes into contact with the limit switch 7a to operate this switch. As the movable detection unit 3 moves forward, it moves further downward due to sliding between the slope 6a and the work shaft 10, and the work shaft 10 moves along the slope 6a.
6b to the horizontal plane 6b. At this time, the dog 5c of the lockshaft 5 comes into contact with the vertical wall 2, and the forward movement of the lockshaft 5 is stopped, but the moving platform 1 is pushed forward, and the base of the lock head 5d of the lockshaft 5 is pushed forward. It comes into contact with the inner surface, and a tensile force acts on the lockshaft 5. Therefore, a pressing force acts between the base of the lock head 5d and the inner surface of the movable table 1, and the upward movement of the movable member 3 is stopped by frictional force. At this time, if the starting position of the work shaft 10 is within the proper range, the movable detection section 3 is moved downward to the proper position, and the protruding piece 3b comes into contact with the limit switch 7b to operate this switch. This makes it possible to measure whether the starting position of the workshaft 10 is within the appropriate range. If the starting point position of workshaft 10 is within the appropriate range, workshaft 1
Rotate so that 0 moves upward. At this time, if the stroke value of the work shaft 10 is equal to or greater than the appropriate value, the work shaft 10 comes into contact with the horizontal portion of the rotating member 8 and rotates it by a predetermined amount or more, so that the lower end of the rotating member 8 attempts to separate from the limit switch 7c and presses this switch. Since it is operated, it is possible to measure that the stroke value is greater than or equal to a predetermined stroke value. Here, if the stroke value of the workshaft 10 does not reach the predetermined value 12, the workshaft 10 does not come into contact with the rotating member 8, so the limit switch 7c is not operated. work shaft 10
Measure the starting point position and stroke value,
When moving the apparatus away from the work shaft 10, the moving cylinder 2a moves the moving table 1 and the movable detection section 3 backward. As this movement progresses, the dog 5c comes into contact with the vertical wall 2c, and the lockshaft 5
moves forward relative to the movable base 1, so the base of the lock head 5d and the inner surface of the movable base 1 are no longer rubbed against each other, and the movable detection unit 3 is moved upward together with the lock shaft 5 by the coil spring 4, and the stopper is moved upward. 1c to stop the movement.

In this embodiment, the vertical stroke of the work shaft 10 is measured, but the measuring device may be configured to measure the horizontal stroke.

Effects of the invention As explained above, this invention can measure the starting point position and stroke of the work shaft relative to the work reference with a simple structure, making it possible to provide an inexpensive device and greatly increasing work efficiency through automation. do. Moreover, since the number of parts can be significantly reduced, measurements can be performed with simple operations, further improving work efficiency, and maintenance work such as parts replacement and repair for failures can be facilitated.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of an embodiment of this invention, Fig. 2 is a side view, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a work mechanism consisting of reciprocating motion. FIG. 2 is a schematic diagram showing a measurement state of an example of a tilt mechanism of a column device for an automobile. 1...Moving table, 2a...Moving cylinder, 3...
...Movable detection unit, 5...Lock shaft, 6...Shaft guide, 7a, 7b, 7c...Limit switch, 8...Rotating member.

Claims (1)

[Scope of utility model registration request] It consists of a movable table that moves back and forth in a direction orthogonal to the reciprocating direction of a reciprocating work shaft, and a movable detection unit mounted on the movable table so as to be movable in the reciprocating direction of the work shaft, A shaft guide is formed on the tip edge of the movable detection part to move the movable detection part in the direction of reciprocation by the workshaft fixed to one end of the reciprocating motion. A first detection means is provided at a location separated by a predetermined dimension in the direction, and the first detection means is actuated by contact with the work shaft, and the movable detection unit is provided with a first detection means that is activated when the movable detection unit is moved by the shaft guide. a second detector is provided to be activated;
Furthermore, a fixing means is provided between the movable table and the movable detection section to stop the movement of the movable detection section in the reciprocating direction when the work shaft comes into contact with the work guide and the movable table moves forward by a predetermined distance. A stroke measuring device comprising: