JPS59163009A - Device for preventing material from plunging between table rolls - Google Patents

Abstract

PURPOSE:To discriminate easily a steel sheet from a titled device and to recognize accurately a crop shape, etc. of the sheet by slanting the upper surface of the device installed between table rolls and reflecting the light irradiated from a light source of the upper part sideward or downward. CONSTITUTION:A titled device 1 is arranged in the state of hurdles between table rolls 2, 2'. The fron side of the advancing direction of a steel sheet 3 of the device 1 is formed slightly higher than the rear side of it to guide the front end of the sheet 3 onto the roll 2' at the front side. The upper surfaces of the hurdles of device 1 are respectively slanted to both sides in the lateral directions with respect to a horizontal plans. Because the slanting angles reflect the light irradiated from a light source 4 of the upper side downward or sideward when the light strikes the device 1, a television camera 5 accurately discriminates the sheet 3 from the device 1. (the light striking against the sheet 3 reflects upward). With this device 1, the front end of sheet 3 is effectively prevented from plunging into the space between the rolls 2, 2'

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention (c) provides a material thrust prevention device installed between the material conveying table O-ra of a rolling line, more specifically, a table corresponding to a location where a planar shape measuring device is installed above. This invention relates to a material thrust prevention device installed between rollers.

When conveying rolled steel plates with table rollers, m477
In order to avoid a situation in which the tip ends up sticking between the table rollers and getting stuck, a device for preventing material from sticking into the table rollers is provided between the table rollers. In general, a material thrust prevention device is a plate-shaped or slat-shaped steel plate installed between table rollers.The upper surface of the plate is almost horizontal, and the material is positioned slightly below the upper surface of the table roller. 1. On the other hand, after rolling, the steel plate is guided so that it always rides on the top surface of the table roller in front.On the other hand, the steel plate after rolling is used to ensure that the crop cutting operation is performed accurately and reliably, or to make it easier to cut the next crop. In order to do this, the crop shape, bending, or plate shape of the steel plate is measured using a planar shape measuring device that uses optical equipment such as an industrial television camera and a light source installed above the line.

This type of planar shape measuring device irradiates the steel plate surface with light from above the line and monitors the shape with an industrial television camera. However, since the top surface of conventional material penetration prevention devices is almost horizontal, when light from an upper light source hits the installation, it is reflected upward in the same way as when light hits the steel plate, and therefore the steel plate and material There were problems in that it was difficult to distinguish it from the plunger stopping device, and the cropped shape of the steel plate mentioned above could not be accurately recognized.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and according to the present invention, there is provided a material thrust prevention device whose upper surface is sloped so as to reflect light from an upper light source to the side or downward.

Hereinafter, preferred embodiments of the present invention will be described with reference to accompanying drawings.

FIG. 1 is a schematic plan view showing a state in which an embodiment of the material thrust prevention device according to the present invention is installed between table rollers, FIG. 2 is a side view of the same, and FIG. 6 is a cross section taken along line A-A in FIG. It is a diagram.

The side oblique thrust prevention device 1 is arranged like a drainboard between the table rollers 2 and 2'. Each material thrust prevention device 1 has a slightly higher front side in the direction of movement of the steel plate 6 (the left side in Figures 1 and 2), so that the tip of the steel plate 6 rests on the upper surface of the front table roller 2'. I will guide you as follows.

As is clear from FIG. 6, the upper surface of the material plunging prevention device 1 is inclined at an angle θ laterally to the left and right with respect to the horizontal plane. The inclination angle θ is determined by the fact that when the light from the upper light sources 4 hits the material penetration prevention device 1, it is reflected to the side or downward, so that the television camera 5 can see the steel plate filter (the light hitting the steel plate filter is directed upward). (reflected by) and the material plunge prevention device 1 can be accurately distinguished.

FIG. 4 shows the inclination angle θ of the upper surface of the material thrust prevention device 1, and
It is a graph showing the relationship with the material normal recognition rate showing how accurately the crop shape etc. of the steel plate B can be recognized. As can be seen from this graph, when the inclination angle θ is small, there is a lot of light reflected upward, so the normal recognition rate of the material is low, and when the inclination angle θ becomes about 45° or more, it improves markedly.

Therefore, numerically speaking, it is desirable that the inclination angle θ is approximately 45° or more. In the example shown in Figure 6, the inclination angle θ is 6
It is set to 0°.

Further, the slanted upper surface of the material ramming prevention device 1 may be made into a rough surface having minute irregularities, and the effect of distinguishing it from the steel plate 6 may be enhanced by diffusely reflecting light on the rough surface.

Further, it is desirable that the upper end of the material thrusting device 1 be rounded as shown in FIG. 5 so as not to damage the steel plate.

As described above, according to the present invention, the material penetration prevention device reflects light from an upper light source sideways or downward, so it can be easily distinguished from a steel plate that reflects light upward. Crop shape, bending condition, width, etc. can be accurately measured.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a state in which an embodiment of the material thrust prevention device according to the present invention is installed between table rollers. Fig. 2 is the same (side view). Fig. 6 is a sectional view taken along the line A-A in Fig. 1. Fig. 4 is a graph showing the relationship between the inclination angle of the upper surface of the material thrust prevention device and the normal material recognition rate. Fig. 5 The figure is a fragmentary view showing a modification of the upper end of the device for preventing material thrusting 1. 1... Material thrusting prevention device 2, 2... Table roller 6... Steel plate 4... Light source 5... TV camera diagram 1

Claims (1)

[Claims] In a material thrust prevention device installed between a table loaf and a VC, which correspond to the installation location of a planar shape measuring device for measuring the planar shape of a steel plate, from above the table roller for material conveyance of a rolling line, the light source of the planar shape measuring device is installed. A device for preventing material from sticking between table rollers, characterized in that its upper surface is inclined so as to reflect light irradiated from the table sideways or downwardly.