JPH0729442Y2 - Running thickness gauge - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a running thickness meter capable of continuously measuring the thickness of a running plate or the like. The present invention relates to an improvement of a guide roller provided so as to be held in a position.

[Conventional technology]

FIG. 9 and FIG. 11 show a conventional general running gauge. Inside the measuring head 1, a pair of upper and lower guide rollers 2 and 3 are provided with the measuring unit 4 in between. Each of these guide rollers 2 and 3 is rotatable, and the lower side is fixed and the upper side can be moved up and down. The guide rollers 2 and 3 are rotatably sandwiched between the upper and lower surfaces of the plate member 5 running in a direction orthogonal to the direction in which the guide rollers 2 and 3 face each other in a substantially horizontal plane. Further, the measuring unit 4 is composed of a pair of measuring elements that move vertically by contacting both upper and lower surfaces of the plate material 5, and the thickness of the plate material 5 is detected from the deviation of the displacement amount of both measuring elements.

[Problems to be solved by the invention] As shown in FIG. 11, a guide roller for a conventional running gauge
2 and 3 are basically cylindrical, and the tapered surface 6 is provided on the end surface on the side where the plate member 5 is inserted. The corner 8 connecting the cylindrical surface 7 and the tapered surface 6 was rounded, but the radius of the R was considerably small because the angle between the cylindrical surface 7 and the tapered surface 6 was large. . For this reason, when the plate member 5 is sandwiched by the pair of upper and lower guide rollers 2, 3, the corners 8 may cause indentations on the surface of the plate member 5. Particularly, in the case of a mirror-finished plate material that is easily scratched by a small force, or a plate material whose end edges are curved as shown in FIG. There was a problem that stress was concentrated on the contact portion with 3 and indentation was likely to occur.

[Means for Solving the Problems]

The running thickness gauge of the present invention has a rotating shaft that has a rotating shaft that is substantially orthogonal to the traveling direction of a traveling plate-shaped object to be measured, and a rotatable detection head attached to the detection head. In a running thickness gauge provided with a guide roller rotatably sandwiching both sides and a detecting means for contacting an object to be measured in the vicinity of the guide roller and detecting its thickness, a cross section in the axial direction of the guide roller The shape is characterized by an outwardly bulging curve in which a curve having a large curvature at the central portion and a curve having a small curvature at both end portions are smoothly continuous.

[Action]

The edge portion of the object to be measured is supported by the peripheral surface of the guide roller having a curved surface shape that bulges outward.

〔Example〕

 An embodiment of the present invention will be described with reference to FIGS.

1 to 3 show the vicinity of the measuring head 11 of the running gauge 10 according to this embodiment. In FIG. 1, a plate material 12, which is an object to be measured, travels in a direction perpendicular to the paper surface, and a measurement head 11 sandwiches an edge portion thereof from above and below for measurement.

The moving base 13 of the measuring head 11 is engaged with the guide rail 14 so that it can move in the horizontal direction (left and right direction in FIGS. 1 and 3) orthogonal to the traveling direction of the plate 12. A column 17 having a vertical slide base 16 is vertically movably provided on a column 15 standing on the moving base 13. At the upper end of the base 17, the base 17 is
An adjusting ring 18 for moving up and down is provided, and the height of the entire measuring head 11 can be set according to the pass line of the plate member 12. Further, the vertical slide base 16 of the base 17 is suspended by a tension spring (not shown), and can be slid with respect to the base 17 in the vertical direction (indicated by arrow A) from the stop position by a predetermined length.

Next, the measuring head 11 is attached to the vertical slide base 16 via a rotary shaft 19. As shown by the arrow B in FIG. 2, the measuring head 11 can rotate about the rotation shaft 19 so as to swing its head within a predetermined angle range on the left and right. A mechanism for returning the swinging of the measuring head 11 in the direction B to the original position is provided at both upper and lower positions of the rotary shaft 19. That is, the V heads 20 and 20 are provided on the right end surface of the measuring head 11, and the vertical slide base 16 is provided with roller pins 21 and 2 which are urged forward by springs incorporated therein.
1 is provided. And V block 20 and roller pin 2
1 is engaged, and when the measuring head 11 swings its head in the direction of B around the rotary shaft 19, the roller pin 21 is pushed and contracted by the slope of the V block 20. Such a mechanism has a rotating shaft 19
Since the measuring head 11 swings its head, the elastic force of a spring (not shown) acts on the measuring head 11 in a swinging direction and a reverse rotation force.
This allows the measuring head 11 to return to the central position shown.

Next, the tip of the rotary shaft 19 and the measuring head 11 are
It is rotatably connected by a horizontal rotation pin 22 orthogonal to the. As a result, the measuring head 11 can be swung so as to swing its head within a predetermined upper and lower angular range as indicated by arrow C. Two tension springs 23 are connected between both side surfaces of the measuring head 11 and the upper ends of the upper and lower slide bases 16, respectively.
11 can be returned to the central position shown.

As described above, the measuring head 11 of the present embodiment is
Since it is possible to move in each direction of (b) and (c), it is possible to follow any movement such as undulation and displacement of the plate material 12.

As shown in FIGS. 4 and 5, the machine frame 24 of the measuring head 11
Inside, a pair of upper and lower guide rollers 25, 26 are arranged side by side along the running direction of the plate member 12. The lower guide roller 26 is rotatably attached to a U-shaped lower support frame 27 fixed to the machine frame 24. The upper support frame 28, to which the upper guide roller 25 is rotatably attached, can move up and down with respect to the machine frame 24 via a guide rod 29. A rod portion 32a of a lever member 32 that swings around a shaft 31 is engaged with the upper end of the operation rod 30 of the upper support frame 28. The rod of the drive cylinder 33 is engaged with the other end of the lever member 32, and by operating the drive cylinder 33, the upper guide rollers 25, 25 can be simultaneously moved up and down. .

Unlike the conventional substantially cylindrical shape, the upper and lower guide rollers 25 and 26 of this embodiment have a shape in which most of the peripheral surface 34 is a large-diameter curved surface and bulges outward, as shown in FIG. There is. In this embodiment, the peripheral surfaces near both ends of the guide rollers 25, 26 are composed of curved surfaces having a relatively small curvature, but since the peripheral surface of the central portion has a large curvature as described above, both are smoothly continuous. There is no step angle.

Although not shown, the guide rollers 25, 2 on the rotating pin 22 side
Next to 6 is an edge sensor that detects the edge of the plate material inserted into the guide rollers 25 and 26. This edge sensor is composed of two sets of air jets and an air sensor, and can detect that the edge portion of the plate material blocks the air jets. In this embodiment, the position of the measuring head 11 is controlled so that the air jet on the front end side of the measuring head 11 is blocked but the air jet on the rear end side is maintained. Has become.

As shown in FIGS. 4 and 5, between the guide rollers 25, 26, there is provided a measuring arm 40 having a detecting unit which is a means for measuring the plate thickness.
The measuring arm 40 is swingably provided on a V block 41 fixedly installed in the machine frame 24 of the measuring head 11 with a support shaft 42. As shown in FIG. 7, an upper detection unit 43 and a lower detection unit 44 are provided at the tip of the C-shaped measuring arm 40.

FIG. 8 is an enlarged cross-sectional view of the upper detection unit 43, in which reference numeral 45 is a displacement sensor. The displacement sensor 45 is
The main body 46 having a built-in differential transformer, and a probe 47 that can freely move in and out of the main body 46, and the probe that follows the plate material.
The displacement of 47 can be detected within a predetermined range (for example, 1 mm). The main body 46 of the displacement sensor 45 is integrally fixed to a cylindrical inner case 48. From the cap 49 screwed onto the upper end of the inner case 48, the cable 50 of the displacement sensor 45 is
Has been derived. An air pipe 51 is connected to the main body 46 of the displacement sensor 45 so that the probe 47 of the displacement sensor 45 can be sucked up to a retracted position by applying vacuum suction. Next is the displacement sensor
An inner case 48 accommodating 45 is accommodated in a substantially cylindrical outer case 52 fixed to the measuring arm 40, and both upper and lower ends thereof project from the outer case 52. A bearing member 53 is attached to the outer surface of the inner case 48.
53 is engaged with a guide groove 54 provided on the inner surface of the outer case 52 so as to be vertically movable. That is, the inner case 48 containing the displacement sensor 45 cannot rotate with respect to the outer case 52, but can move in the vertical direction. And the inner case protruding from the outer case 52
A precision screw portion 55a is formed at the upper end of 48. The precision screw 55a has a drive nut 5 that covers the upper end of the inner case 48.
The precision threaded portion 55b of 6 is engaged. This drive nut 56
A gear 57 is fixed to the lower end surface of the
It meshes with the gear 59 of the drive shaft 58 as shown. The drive shaft 58 is linked to the stepping motor 60 shown in FIGS. 4 and 5.

Next, the lower detection unit 44 does not have a mechanism for moving the entire lower detection unit 44 up and down with respect to the measurement arm 40. Displacement sensor 47
The configuration of itself is the same as that of the upper detection unit 43, and the probe moves up and down within a measurement range of 1 mm, for example.

Thus, according to the upper detection unit 43 of the detection means of this embodiment, the rotation of the stepping motor 60 is controlled by the precision screws 55a, 55
The displacement sensor 45 can be moved up and down via b. Therefore, for example, the displacement sensor 45 of the upper detection unit 43 can be vertically moved and positioned within a range of 10's of mm, and the interval between the upper and lower detection units 43, 44 can be precisely set according to the plate thickness to be measured.

Next, the operation of the above configuration will be described.

First, the measurement head 11 is retracted together with the moving base 13,
Keep away from twelve. Then, the height of the measuring head 11 is adjusted to the pass line of the plate material 12 by using the adjusting ring 18.

Next, by driving the stepping motor 60, the displacement sensor 45 of the upper detection unit 43 is appropriately moved up and down, and according to the plate thickness of the plate material 12 to be measured, both of the tracing stylus 47, 47 of the vertical detection unit 43, 44 Set the interval. And the upper detection unit 43
The displacement sensor 45 is vacuum-sucked, and the tracing stylus 47 is further pulled up and retracted.

Further, the drive cylinder 33 is operated to pull up both the upper guide rollers 25, 25.

Next, the measuring head 11 is advanced toward the plate material 12, and the edge portion of the plate material 12 is inserted between the upper and lower guide rollers 25 and 26. At this time, the edge sensor detects the edge portion.

Next, the upper guide roller 35 is lowered to sandwich the plate material 12 with a predetermined force.

According to this embodiment, the guide roller that clamps the plate member 12
The peripheral surface 34 of 25, 26 is composed of a smooth large-diameter curved surface that bulges outward. Therefore, the plate material to be clamped is not easily scratched, and even a plate material that is mirror-like and curved and easily scratched can be held with a sufficient clamping force. Therefore, the measuring head 11 can reliably follow the path line variation of the plate member 12 due to the effect of the above-described mechanism of the measuring head 11 for following the three directions a, b, and c.

Next, the vacuum suction is released and the probe 47 of the upper detection unit 43 is released.
And bring it into contact with the upper surface of the plate material 12 to start the measurement. As described above, the measuring head 11 of the present embodiment surely follows the path line variation of the plate material, so that the plate thickness measurement obtained from the measurement signals output from the upper and lower displacement sensors becomes more accurate.

In the embodiment described above, the shapes of the guide rollers 25 and 26 are specifically shown, but of course, this is only an example.

Even if the guide roller is provided only on the lower side or on the upper side, the same effect can be obtained by the present invention as long as the guide roller is pressed against the object to be measured.

[Effect of device]

The guide roller of the running thickness gauge according to the present invention has a substantially cylindrical shape, but when the external shape of the axial cross section is seen, a curve with a large curvature at the central portion and a curve with a small curvature at both end portions are smoothly continuous. It is a curved line that bulges outward. Therefore, even a mirror-like curved object to be measured that travels in a predetermined direction can be reliably held and measured without making an indentation. Further, since there is little fear of making an indentation, the work clamping force by the guide roller can be made sufficiently large, so that follow-up to the path line fluctuation of the object to be measured can be ensured.

[Brief description of drawings]

FIG. 1 is a front view of a main part of a running gauge of an embodiment of the present invention, FIG. 2 is a left side view of the same, FIG. 3 is a plan view of the same, and FIG. 4 is a cross section of a measuring head in the same embodiment. 5 and 5 are partial sectional views seen from the right side in FIG. 4, FIG. 6 is a sectional view of a guide roller in the same embodiment, and FIG. 7 is a drawing showing a measuring arm in one embodiment of the present invention. FIG. 8 is a sectional view of the upper detection unit in the measuring arm of the same embodiment, FIG.
Figure is a front view of a conventional running gauge, Figure 10 is a right side view of the same,
FIG. 11 is a diagram showing a problem of the guide roller in the conventional running gauge. 10: Running thickness gauge, 12: Plate material as the object to be measured, 25,2
6,61 ...... Guide roller, 34 ...... Circumferential surface, 45 ...... Displacement sensor as detection means.

Claims (1)

[Scope of utility model registration request] 1. A rotatable detection head (11) having a rotating shaft (19) substantially orthogonal to the traveling direction of a traveling plate-like object to be measured.
And a guide roller attached to the detection head for rotatably sandwiching both sides of the plate-shaped object to be measured, and a detection means for contacting the object to be measured in the vicinity of the guide roller and detecting its thickness. In the running gauge, the axial cross-sectional shape of the guide roller is an outwardly bulging curve in which a curve with a large curvature at the central portion and a curve with a small curvature at both end portions are smoothly continuous. A running thickness gauge characterized by the following.