FR2484628A1 - Pitch measuring device for corrugated sheet - has two half-cylindrical rollers one of which is slidable along attaching plate with graduations - Google Patents

Abstract

The device includes a half-cylinder (1) which is fixed under a plate (2) and another half-cylinder (3) which slides under the same plate. The position of the fixed half-cylinder (1) can be adjusted in relation to the pitch to be measured; a mark (12) on the fixed half-cylinder indicates on a graduation (13) on the plate (2) the nominal pitch. The device is placed with the half-cylinders in two consecutive troughs on the corrugated sheet. A mark (16) on the sliding half-cylinder (3) indicates if the pitch of corrugation is between the minimum mark (17) and maximum mark (18) admissible. The device may also include a micrometer whose comparator (4) is positioned on the plate (2) and whose mobile part (6) is connected to a pin (7) of the sliding half-cylinder.

Description

 The present invention relates to a wave pitch control apparatus for quick, easy and precise measurements.

 It is known to control the wavelengths of the corrugated plates using metal rollers each having a thin apparent tip in the center, such as those described in standard NF P 33 - 301, and a ruler graduated in millimeters.

 This method is not fast, not practical and it only allows you to appreciate half a millimeter. Indeed, it is first necessary to place the point rollers, independent of each other, in the hollow of the waves, slightly protruding the points of the end of the plate (so we can not control the pitch of wave only on the two ends of the plate), then place the millimeter graduation of the ruler under the points, which requires a certain dexterity. This operation is not practical and moreover, it is long.

Conversely, the apparatus of the present invention, characterized in that it comprises two dependent half-rollers, one fixed to a slide plate and the other free sliding on said plate, and a micrometer to the tenth of millimeter secured to the slide plate, the pusher (movable part of the comparator authorizing the measurement) is in abutment against a lug secured to the sliding half-roller, allows quick, easy measurements by simply reading the dial of the micrometer and precise because we can appreciate half a tenth of a millimeter, and this over the entire length of the plate.

More specifically, the apparatus according to the invention comprises a hole in its fixed part and its mobile part which can receive an immobilizing pin, in order to adjust the comparator, which is fixed by a stirrup, at the nominal of the chosen wave pitch (example: graduation 7 for 177), then block said comparator. Another advantage of the device is that it allows to quickly and easily detect profiled plates outside tolerances thanks to fixed Mini and Maxi marks engraved on the slide plate. The Micrometer can be deleted.

The device according to the invention is particularly remarkable in that its fixed half-roll can, after unlocking the adjustment screws, slide on the slide plate and fix according to the wave pitch that one wants to control, thanks to a reference located on the fixed half-roller and a graduation, representing the various predetermined wave steps, engraved on the slide plate.

 It is also advantageous for the device according to the invention to have a take-up of the slide located on the sliding part and two handles fixed on the slide plate facilitating its gripping.

 The detail of the present invention will be better understood on reading the description of the nonlimiting example described below and the attached figure showing a perspective of the apparatus according to the invention.

 In an interesting embodiment, the device according to the invention comprises a half-roller 1 fixed to a slide plate 2 on which a half-roller 3 can slide freely. A micrometer to the tenth of a millimeter, whose comparator 4 is fixed to the plate 2 by means of a stirrup 5 and whose pusher 6 abuts against a lug 7 secured to the movable half-roller 3 can play thanks to a light 8 of the plate 2, allows quick easy and precise measurements, a function of the displacement of the movable half-roller 3 relative to the half-roller 1, by simple reading of the dial 9.

 A hole 10 in the plate 2 and the half-roller 3 allows the introduction of a spindle which immobilizes the mobile half-roller 3: the stirrup 5 then makes it possible to slide the comparator 4, in order to adjust it to the nominal of the no wave chosen, then block it.

Lights 11 of the plate 2 make it possible to fix the half-roller 1 to the plate 2 by adjusting screw as a function of the wave pitch which it is desired to control.

A reference 12 of the half-roll 1 indicates on a graduation 13, engraved on the plate 2 and representing the predetermined wave steps, the selected wave step.

 The movable half-roller 3 has screws 14 which make it possible to make up for the play which could occur at the slide. On the plate 2 are fixed two handles 15 which facilitate the gripping of the device.

 A method of using the device is described below.

We first select the wave pitch of the profiled plate that we want to control, by placing the mark on the half-roll 1 opposite the graduation corresponding to the said wave step, after loosening the half-roll 1 of the plate 2. The half-roller 1 is then reattached to the plate 2. A pin is then introduced into the hole 10 to immobilize the half-roller 3. The bracket 5 is loosened, the comparator 4 is slid from the micrometer until the dial hand is on the nominal, then the comparator is blocked using the caliper.

We remove the immobilizing spindle, which frees the movable half-roller 3, we check that it slides perfectly on the plate 2, we possibly catch the play of the slide with the screws 14. We grab the device by the handles 15, the two half-rollers are placed in two consecutive wavelengths of the plate, by pressing the outside of the half-rollers on the sides, inside the wave. On the dial of the comparator, the value of the wave pitch is immediately read, to half a tenth of a millimeter. On the half-roller 3, it is easy to detect, using the reference 16, the profiled plates outside the minimum 17 and maximum 18 deviations defined by the Standard for control by attribute.

 The wave pitch control device, object of the invention, allowing rapid, easy and precise measurements, is of particular interest to the industries which produce profiled plates and their users.

Claims (9)

 1 - Apparatus for controlling the wave pitch, characterized in that it consists of two half-rollers which are dependent on each other.  2 - wave pitch control apparatus according to claim 1, characterized in that one of the half-rollers is fixed to a slide plate and that the other half-roll can slide on said plate. 3 - apparatus for controlling the wave pitch according to claim 2, characterized in that the fixed half-roller can be adjusted as a function of the wave pitch that it is desired to control.  4 - wave pitch control device according to claim 3, characterized in that it can be used without comparator and allow easy detection using benchmarks of non-standard profiled plates.  5 - wave pitch control device according to claim 3, characterized in that it comprises a micrometer whose comparator is secured to its fixed part and the pusher secured to its movable part. 6 - wave pitch control device according to claim 5, characterized in that it comprises a hole in its fixed part and its movable part allowing to receive an immobilizing pin in order to adjust the comparator.  7 - wave pitch control device according to claim 6, characterized in that the comparator is fixed by a bracket which allows the adjustment and the blocking of said comparator.  8 - A wave pitch control device according to any one of claims 3 to 7, characterized in that its sliding movable part has a backlash of the slide. 9 9 - wave pitch control apparatus according to any one of claims 3 to 8, characterized in that it comprises two handles to facilitate its gripping.