JPH09119816A - Coating material thickness measuring device for building materials - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a coating film thickness measuring device for a building material which is nondestructive and capable of automatically measuring an accurate coating film thickness in a process and having a simple structure. Has an aim. SOLUTION: A building material is placed on a guide provided on a conveyor, the building material is conveyed by the conveyor, and the surface of the building material is painted at a coating booth provided during the transportation, and the guide is applied at a predetermined position in front of the entrance of the painting booth and at the painting. If you operate the switches provided at the predetermined positions behind the booth exit,
The distance measuring means provided in front of the painting booth entrance and behind the painting booth exit respectively measure the distance between the building material before painting and the distance measuring means and the distance between the building material after painting and the distance measuring means, and the calculation means from the results. The coating film thickness was calculated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating film thickness measuring device for building materials.

[0002]

2. Description of the Related Art As an inorganic building material such as a roofing material, there is one in which a paint is applied to the surface after molding in order to impart decorativeness and weather resistance. In the case of such an inorganic building material, the thickness of the coating film is closely related to the weather resistance, and it is important to secure a predetermined coating film thickness, but due to clogging of the spray nozzle that sprays the paint, etc. In some cases, painting may not be performed sufficiently in the painting booth.

Therefore, conventionally, the thickness of the product after coating is extracted and inspected, and when a defective thickness is found, the spray nozzle or the like is inspected and replaced.

[0004]

However, in the above-mentioned conventional method, since the result cannot be obtained instantaneously, there is a possibility that defects will considerably occur until the inspection result comes out, and since it can be inspected only by sampling, it sprays for a moment. If a nozzle is clogged, it cannot be detected, and there is a risk of overlooking a defective product.

Therefore, the inventor of the present invention employs a conveyor 200 and a laser as shown in FIG. 3 adopted in the inspection system previously proposed in Japanese Patent Application No. 7-210468 in order to detect defects such as cracks in building materials. If the coating film thickness measuring device 100 including the distance measuring means 300 such as a displacement meter is used,
It was thought that the thickness of the coating film of the building material 400 could be measured continuously continuously.

That is, the coating film thickness measuring device 100
The building material 40 on the conveyor body 201 of the conveyor 200.
0 receiving plates 203 are provided at a predetermined pitch, and as shown in FIG.
03 by pressing the positioning means 204 of 03
The position of 0 on the receiving plate 203 is always constant.

The building material 400 is conveyed from the entrance to the exit of the coating booth 500 by the conveyor 200, and at the front of the entrance of the coating booth 500.
Distance measuring means 30 directly above the conveyor 200 behind the exit
0 and 300 are arranged respectively, and when the building material 400 mounted on the receiving plate 203 reaches a fixed position directly below the distance measuring means 300, the distance from the distance measuring means 300 to a fixed point on the surface of the building material 400 is measured, respectively. Distance measuring means 30
The thickness of the coating film was measured by the personal computer 700 as a computing device from the results of the distance to the building material 400 before painting and the distance to the building material 400 ′ after painting detected at 0 and 300.

However, if the coating film thickness measuring device 100 is used, it becomes possible to continuously and accurately measure the coating film thickness of the building material.
4 by pressing the corner portion 401 of the building material 400 to the building material 4
Since the positioning of No. 00 must be performed, workability is poor, and it is difficult to position a building material having a curved corner portion. In addition, the receiving plate 203 has to be provided on the conveyor main body 201, which makes the apparatus complicated,
There was also the problem that equipment costs were also required.

In view of the above circumstances, the present invention is capable of nondestructively and automatically measuring an accurate coating film thickness in a process and measuring the coating film thickness of a building material having a simple structure. The purpose is to provide a device.

[0010]

In order to achieve such an object, a coating film thickness measuring device for building materials according to the present invention,
It is installed so that both ends penetrate the coating booth and are exposed to the outside of the coating booth, and it is provided integrally with the conveyor that conveys building materials from the entrance of the coating booth to the exit and the building material placement position of the conveyor. A guide that indicates the building material placement position and is installed above the conveyor in front of the entrance of the painting booth.
First distance measuring means for measuring the distance to the building material conveyed by the conveyor, and a position above the conveyor behind the exit of the coating booth and having the same distance and widthwise position with respect to the conveyor as the first distance measuring means. And a coating film based on the results measured by the second distance measuring means, the first distance measuring means, and the second distance measuring means for measuring the distance to the building material after painting, which is provided on the conveyor. Calculating means for calculating the thickness of the first distance measuring means, a first switch which is operated by the guide to start the measurement of the first distance measuring means when the guide reaches the measurement position of the first distance measuring means, When the guide comes to the measurement position of the second distance measuring means, it is operated by the guide, and the second switch for starting the measurement of the second distance measuring means is provided.

In the above structure, the guide is not particularly limited, but examples thereof include a protrusion protruding from the side surface or the lower surface of the conveyor, a reflecting plate, and the like.
The switch is not particularly limited as long as it can actuate the distance measuring means by the action of the guide, and examples thereof include a limit switch and a photoelectric tube switch.

The distance measuring means is not particularly limited, but a laser displacement meter or the like is preferable because it can measure with high accuracy.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 show an example of a coating film thickness measuring apparatus for building materials according to the present invention. As shown in FIG. 1 and FIG.
Is a chain conveyor 2, laser displacement gauges (for example, ultra-high precision laser displacement gauge LC-2400 type manufactured by Keyence Co., Ltd.) 3 and 4 as distance measuring means, and a plurality of guide plates 5.
And limit switches 6 and 7 and a personal computer 8 as a computing means.

The chain conveyor 2 has two chains 2.
1 and 21, the building material A is placed and conveyed from the entrance to the exit of the coating booth 9, and the placement surface is horizontally moved at the same level. The first laser displacement meter 3 is provided immediately above the entrance of the coating booth 9 and directly above the chain conveyor 2.

The second laser displacement meter 4 is a coating booth 9
At the position just above the chain conveyor 2 behind the outlet of the
The height position and the relative position in the width direction of the chain conveyor 2 are provided at the position corresponding to the height position of the first laser displacement meter 3 and the relative position in the width direction of the chain conveyor 2. The guide plate 5 is provided so as to extend laterally from one chain 21 of the chain conveyor 2.

The first limit switch 6 is provided in the vicinity of the first laser displacement meter 3 before the entrance of the coating booth 9, and the second limit switch 7 is the second laser displacement behind the exit of the coating booth 9. It is provided near 4 in total,
The guide plates 5 moved by the driving of the chain conveyor 2 come into contact with each other, so that the first laser displacement meter 3 or the second laser displacement meter 4 causes the distance from the building material A before coating or the building material A after coating. It's designed to measure the distance from ´.

The personal computer 8 is adapted to calculate the thickness of the coating film from the difference in distance measured by the first laser displacement meter 3 and the second laser displacement meter 4.

The coating film thickness measuring device 1 measures the coating film thickness as follows.
That is, first, the guide plate 5 of the chain conveyor 2 which is driven at a predetermined transport speed in front of the entrance of the coating booth 9.
A building material A such as a roofing material is placed immediately above.

Building material A placed on the chain conveyor 2
Is conveyed to the coating booth 9 at a predetermined speed by the drive of the chain conveyor 2, and the guide plate 5 hits the limit switch 6 and the limit switch 6 is turned on. When the limit switch 6 is turned on, the distance between the first laser displacement meter 3 and the portion immediately below the first laser displacement meter 3 on the surface of the building material A before painting is measured by the laser displacement meter 3 at that time. .

Further, the building material A conveyed to the coating booth 9 is coated in the coating booth 9 and then,
It is sent out from the exit of the painting booth 9. The building material A ′ after painting sent from the painting booth 9 is sent to the next step such as a drying step, but immediately after coming out from the exit, the guide plate 5 hits the limit switch 7 and the limit switch 7 enters.

When the limit switch 7 is turned on,
At that time, the distance between the second laser displacement meter 4 and the portion immediately below the second laser displacement meter 4 on the surface of the building material A ′ is measured by the laser displacement meter 4. It should be noted that the second laser displacement meter 4 is installed on the chain conveyor 2 behind the exit of the coating booth 9.
Since it is provided at a position directly above, and the height position and the position of the chain conveyor 2 in the width direction coincide with the height position of the first laser displacement meter 3 and the position of the chain conveyor 2 in the width direction. Even if the posture of the building material A when placed on the chain conveyor 2 is not constant, the measuring position of the building material A and the measuring position of the building material A ′ always coincide. That is, the workability during placement is good.

The measured value of the first laser displacement meter 3 and the measured value of the second laser displacement meter 4 thus measured are input to the personal computer 8, and the personal computer 8 uses the input result to calculate the coating film. The thickness is calculated accurately.

[0023]

Since the coating film thickness measuring device according to the present invention is configured as described above, in addition to the conveyor for conveying the building material to the existing coating booth, the distance measuring means, the guide plate, and the switch. Since it is only necessary to provide, it is possible to accurately and automatically measure the thickness of the coating film, because the structure is simple and the equipment cost is not required.

Therefore, it is possible to easily measure the coating film thickness of each building material to be coated, and it is possible to minimize product defects.

Moreover, since the building material only needs to be placed on the conveyor so as to cover the guide, the thickness of the coating film can be accurately measured without any problem even with the building material having the curved corner portions.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a coating film thickness measuring apparatus for building materials according to the present invention.

FIG. 2 is a plan view of the coating film thickness measuring device of FIG.

FIG. 3 is an explanatory diagram of a coating film thickness measuring device that the inventor has previously considered.

FIG. 4 is a perspective view of a backing plate of the measuring device of FIG.

[Explanation of symbols]

 1 coating film thickness measuring device 2 chain conveyor (conveyor) 3 first laser displacement meter (distance measuring means) 4 second laser displacement meter (distance measuring means) 5 guide plate (guide) 6 first limit switch ( Switch) 7 Second limit switch (switch) 8 PC 9 Painting booth A Building material (before painting) A'Building material (after painting)

Claims (1)

[Claims] 1. A conveyor which penetrates a coating booth and has both ends exposed to the outside of the coating booth, and which conveys building materials from an entrance of the coating booth to an exit thereof, and a building material mounting position of the conveyor. And a guide for indicating a building material placement position that is integrally provided on the conveyor, a first distance measuring means that is provided above the conveyor before the entrance of the coating booth and measures the distance to the building material conveyed by the conveyor, and the coating booth. A second distance provided above the conveyor behind the exit at a position where the distance and the width direction to the conveyor are the same as the first distance measuring means, and which measures the distance to the painted building material conveyed by the conveyor. The guide has the first means and the calculating means for calculating the thickness of the coating film from the results measured by the measuring means, the first distance measuring means, and the second distance measuring means.
The first distance measuring means for starting the measurement by the guide when the measuring position of the first distance measuring means is reached.
And a second switch which is operated by the guide to start the measurement of the second distance measuring means when the guide reaches the measuring position of the second distance measuring means. Measuring device.