JPH05126535A - Sheet dimension measuring instrument with net-like belt - Google Patents

Abstract

PURPOSE:To obtain a measuring instrument which uses a transmitted light type sensor for measuring the dimensions of a sheet, such as width, length, etc., while the sheet is run. CONSTITUTION:This sheet dimension measuring instrument measures dimensions, such as the width, length, etc., of a sheet 5 with an optical system composed of a light source 4 for emitting flash light and sensor 3 which is sensible to transmitted light while the sheet 5 is carried on a light transmissive net-like conveyor belt 1. Since the width, length, etc., of the sheet 5 can be measured with high accuracy, the efficiency of steel plates, etc., can be remarkably improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a steel plate, paper, plywood,
The present invention relates to an apparatus for measuring dimensions while moving a sheet such as a synthetic resin sheet on a belt conveyor.

[0002]

2. Description of the Related Art When measuring the size of a moving object on a belt conveyor, a conveyor belt that conveys a sheet such as a cutting plate does not transmit light, so that a light reflection type sensor or a television camera is used. It was For example, the technique proposed in Japanese Patent Application Laid-Open No. 2-35305 is an example of this, and a television camera is used.

[0003]

However, JP-A-2-3
The technology proposed in Japanese Patent No. 5305 also states that it is difficult to ensure accuracy when measuring the dimensions of a moving object with a television camera. In order to improve the accuracy when measuring the size of a moving object, it has been desired to use a device that utilizes transmitted light.

[0004]

A sheet size measuring apparatus equipped with a mesh belt according to the present invention comprises a mesh belt for carrying a sheet on its upper part and a transmitter at a relative position above or below the mesh belt. , The receiver is provided, and the transmitter and the receiver are composed of a plurality of transmitted light sensors. Further, the size is detected by optically detecting the end portion of the sheet while the sheet is running. A belt conveyor having a device for measuring, and a plurality of transmitted light sensors arranged in close proximity to each other on the belt conveyor, and a light source for emitting flash light. And is provided.

[0005]

Function: Light, radiation, etc. are transmitted between the meshes of the mesh used as the conveyor belt, and the light transmission type sensor is made sensitive. At this time, a plurality of sensors are installed close to each other to measure the size of a moving object on the belt, and one of the plurality of sensors is always sensitive, so that it is always disturbed by the mesh of the mesh. It is possible to measure the size of a moving object with high accuracy.

The relative position of the transmitter and the receiver does not have to be strictly upper and lower, but is higher and lower in terms of accuracy. The position of the transmitter and the receiver can be either above or below.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheet size measuring apparatus equipped with a mesh belt according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a sheet size measuring device provided with a mesh belt of the present invention, which is a device for measuring width and length.

In FIG. 1, reference numeral 1 denotes a conveyor belt which conveys a sheet composed of a cut plate, which is composed of a mesh body and can transmit light rays. Reference numeral 2 is a conveyor roll that winds the conveyor belt 1 to apply tension to maintain and drive the pass line. Reference numeral 3 is a light receiving portion of the light transmission type sensor. The light receiving portions 3 of the plurality of light transmission type sensors are arranged in the positions close to each other, and when the line portion of the mesh body hits any one of the light receiving portions 3, the remaining light receiving portions 3 receive the light. be able to.

A light source 4 emits a flash light. 5
Is a cut sheet of, for example, a steel plate conveyed by a belt conveyor. The light source 4 emits a flash light when the sheet 5 made of a cut plate approaches the light receiving unit 3. The light receiving portions 3 of a plurality of light transmission type sensors arranged at positions close to each other are responsive to the flash light emitted from the light source 4, and the front end portion of the sheet plate 5 of the steel plate conveyed by the belt conveyor is detected. Detect the position. At this time, the light source 4 at the rear end of the cut sheet 5 of the steel plate also emits flash light at the same time.

The light source 4 and the light receiving portion 3 at the rear end are arranged at a distance equal to the length of the cut sheet 5 made of a steel plate, and the light receiving portions 3 of a plurality of light transmission type sensors are arranged at positions close to each other. Since it is arranged, even if the wire portion of the mesh body hits one of the light receiving portions 3, the remaining light receiving portion 3 can receive the light, and the cut sheet 5 of the steel plate can have the correct length. When cut, the length of the cut sheet sheet of the steel plate is made by the light receiving section 3 at the front end portion of the cut sheet sheet 5 of the steel plate and the light source 4 and the light receiving section 3 at the rear end section of the cut sheet sheet 5 of the steel sheet, which are simultaneously sensitive to the flash light. Can be checked between runs.

FIG. 2 is a plan view of a sheet size measuring device equipped with a mesh belt of the present invention. In the figure, reference numeral 1 is a conveyor belt that conveys a sheet composed of a cut plate, which is composed of a mesh body and can transmit light rays. Reference numeral 3 is a light receiving portion of the light transmission type sensor. The light receiving portions 3 of the pair of light transmission type sensors are arranged at positions close to each other, and the other light receiving portions 3 that remain even when the line portion of the mesh body hits any one of the light receiving portions 3. Can receive light. A light source 4 emits a flash light. Reference numeral 5 is a sheet of cut steel sheet conveyed by a belt conveyor.

[0012] It is very difficult to measure the dimensions of the cut sheet of the steel sheet during running, and it was difficult in the prior art that used a TV camera especially when increasing the measurement accuracy. However, according to the present invention, it becomes possible to measure the length and width of the sheet at the same time with high measurement accuracy during running.

[0013]

As described above, according to the present invention, it is possible to measure the dimension of a sheet of cut sheet with high measurement accuracy during running. Therefore, it is far more than the conventional work in which the line is stopped and the length is measured. The operating rate has improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a sheet size measuring device provided with a mesh belt of the present invention.

FIG. 2 is a plan view of a sheet size measuring device provided with a mesh belt of the present invention.

[Explanation of symbols]

 1 Conveyor belt 2 Conveyor roll 3 Light receiving part 4 Light source 5 Cut sheet

Claims (3)

[Claims] 1. A sheet size measurement provided with a mesh belt for carrying a sheet on an upper part of the mesh belt, and a transmitter and a receiver at relative positions above or below the mesh belt. apparatus. 2. A sheet size measuring apparatus having a mesh belt, wherein the transmitter and the receiver are composed of a plurality of transmitted light sensors. 3. A belt conveyer having a device for optically detecting the end portion and measuring the size of the sheet while the sheet is running, and a net-like body for transmitting the light ray through the belt conveyer, and the belt conveyer is mutually connected. A sheet size measuring apparatus having a mesh belt, comprising: a plurality of transmitted light sensors arranged in proximity to each other; and a light source for emitting flash light.