JPH0452678Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for measuring the physical properties of sheet-like objects such as paper, and more specifically, to a device for measuring the physical properties of sheet-like objects such as paper. The present invention relates to an apparatus for measuring the physical properties of a sheet-like object, which includes means for removing the object.

<Prior Art> In the papermaking process, various parameters that determine paper quality, such as paper basis weight, water content, or optical properties, are detected online and these parameters are controlled.

FIG. 3 shows an apparatus for measuring the various parameters mentioned above in the papermaking process. In the figure, 1 is arrow A
2 is a detection head equipped with a sensor that detects various parameters of paper 1.
A lower head 2a and an upper head 2b are arranged on upper and lower frames 3 and 4, facing each other with the paper 1 in between.

FIG. 4 represents the operating state of the detection head. Up,
The lower detection heads 2a, 2a maintain the opposing positional relationship and reciprocate (scanning operation) in the width direction W of the paper 1. The solid line is the locus of the detection head 2 scanning the paper 1. Assuming that the F direction is the forward direction and the B direction is the backward direction, the detection head 2 moved in the F direction
When it comes off the edge of the paper 1, an interrupt signal is given to the control device and the paper is turned back in the B direction. When the detection head 2 comes off from the opposite end, an interrupt signal is generated in the same way, and the signal is turned back in the F direction. This scanning operation is repeated between the paper edges, and the paper 1
The characteristics in the width direction are measured.

In such a device, a radiation source, light source, etc. is provided in either the lower head 2a or the upper head 2b, and the radiation, light rays, etc. transmitted through and scattered through the paper 1 are detected by a detection section provided in the other head. There is. However, in such a device, paper powder, etc. that falls or scatters from the paper 1 adheres to the cover glass of the measurement window of the heads 2a and 2b, reducing the amount of measured light, etc.
The indicated value fluctuates greatly. For this reason, it is necessary for the operator to periodically clean the surface of the cover glass, which is very troublesome.

<Problem to be solved by the invention> The technical problem to be solved by the invention is to make it possible to easily clean dirt from the measurement window in the above-mentioned apparatus for measuring the physical properties of a sheet-like object. It is in.

<Means for Solving the Problems> The configuration of the present invention is that, in the apparatus for measuring the physical properties of a sheet-like object, a cleaning means is attached to the tip of the sheet-like object, and the strip-like object becomes plate-like when unwound from the core. is provided on the detection head, the strip-shaped body is wound around the core and retracted during measurement, and the strip-shaped body is let out from the core during non-measurement when the detection head is removed from an end of the sheet-shaped object. The strip-shaped body is inserted into the gap between the detection heads, and the dirt on the measurement window of the detection head is cleaned by the cleaning means at the tip of the strip-shaped body.

<Examples> Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing main parts of the apparatus according to an embodiment of the present invention. In the figure, the same elements as those in FIG. 3 are given the same reference numerals.

Although not shown in FIG. 1, the heads 2a,
2b is arranged on the frames 4 and 3, and is scanned in the width direction of the paper 1. 5a and 5b are heads 2a,
A measurement window provided in 2b is covered with a cover glass. 6a and 6b are paper heads 2a,
This is a guide plate to guide you to the cap G between 2b.

Reference numeral 7 denotes dirt removal means, which is a characteristic feature of the present invention.A winding core 7b is pivotally supported on a base 7a fixed to the lower head 2a, and a strip-shaped thin steel plate 7c is attached to the winding core. rolled into a shape. A cleaning means 7d such as a towel is fixed to the tip of this steel plate. 7e is a motor for rotating the winding core 7b, feeding out the steel plate 7c, and winding it up.

With this configuration, the dirt removing means 7 has the steel plate 7c wound around the winding core 7b and retracted to a position away from the sheet-like object passing through the gap G during measurement. When the detection heads 2a, 2b are off the edge of the paper and are not measuring, the motor 7e is driven and the steel plate 7c is unwound from the core 7b. When the steel plate 7c is unwound from the winding core 7b, it becomes plate-shaped,
It is guided into the gap G along the guide plate 6a. When the cleaning means 7d at the tip of the steel plate 7c reaches the measurement windows 5a, 5b, by rewinding the steel plate 7c, dirt adhering to the cover glasses of the measurement windows 5a, 5b can be cleaned.

<Effects of the invention> According to the invention, dirt adhering to the cover glass of the measurement window can be easily removed without interfering with the measurement work, and the measurement is not affected by paper dust or the like.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the device of the present invention;
The figure is a perspective view showing the main parts of the device according to the present invention.
The figure is a perspective view of a conventional device, and FIG. 4 is an explanatory diagram of the operation of the device shown in FIG. 3. 1...Paper, 2a, 2b...Detection head, 5a,
5b... Measuring window, 7... Dirt removal means, 7b...
Winding core, 7c... Steel plate, 7d... Cleaning means.

Claims (1)

[Scope of utility model registration request] A pair of detection heads are arranged opposite to each other with a sheet-like object sandwiched between them, and these heads are moved back and forth in the width direction of the sheet-like object while maintaining their respective opposing positional relationships;
In an apparatus for measuring the physical characteristics of a sheet-like object, a belt-like body is provided on the detection head, and a cleaning means is attached to the tip end, and the belt-like body becomes plate-like when unwound from the winding core. The strip is wound around the winding core and retracted, and during non-measurement when the detection head has come off the edge of the sheet-like object, the strip is let out from the winding core and inserted into the gap between the detection heads. 1. An apparatus for measuring physical properties of a sheet-like object, characterized in that dirt on the measurement window of the detection head is cleaned by a cleaning means at the tip of the strip-like object.