JPS6013545Y2 - Duplicate transfer detection device for steel plates - Google Patents

Description

[Detailed description of the invention] The present invention relates to the invention of a steel plate redundant transfer detection device, and attempts to provide a device that can effectively prevent two or more steel plates from being jammed together in a leveler or the like. It is something to do.

If a steel plate is caught in a composite state in a leveler or the like, roll flaws will occur in the steel plate due to abnormal reduction, or the roll of the leveler will break.

It goes without saying that these are undesirable in any case. In particular, roll breakage requires the leveler's roll to be replaced, resulting in long work stoppages and large losses. Even in cases where such roll breakage does not occur, the roll Polishing and other repairs are required, which requires a lot of man-hours.

In order to avoid such disadvantages, the present applicant has proposed a method for preventing double jamming of a steel plate cut to a regular length using a combination of a phototube and a pulse generator (Implementation 50- 4o2ON Publication), but this is symmetrical to a plate cut to a standard length, and cannot effectively detect jamming of a steel plate that is not of a standard size and prevent double jamming.

The present invention was devised after considering the above-mentioned actual situation, and it is possible to prevent a small plate from entering even under conditions where the operator cannot visually detect it. The weight is appropriately detected mechanically, and the leveling work can be carried out smoothly without the above-mentioned disadvantages.

That is, the present invention provides a roller table for transporting steel plates.
A detection arm with a vertically movable frame between the table rollers, a rotatable touch roll provided on the top of the frame, and a detection roller mounted upstream of the touch roll at a position lower than the upper edge of the outer circumference of the touch roll. The intermediate portion of the detection arm is pivotally connected to the frame so as to be tiltable, and the frame is provided with a limit switch for detecting tilting of the end of the detection arm.

To explain the specific structural relationship of the device according to the present invention as shown in the attached drawings, as shown in FIG.
A frame 5 is provided below between the table rollers 10 and 10, which can be slid vertically by means of a suitable guide member 12, that is, the frame 5 is moved by a pneumatic or hydraulic operating cylinder 6 as indicated by solid lines and imaginary lines. It is admonished to be operated up and down as shown.

A touch roll 1 is rotatably provided on the upper part of the frame 5, and a detection roller is installed at a position slightly lower than the upper end of the outer peripheral surface of the touch roll 1 on the upstream side of the touch roll 1 in the direction of conveyance of the steel plate 11. A detection arm 3 to which a detection arm 2 is attached is tiltably pivoted 8 to a frame 5 at its intermediate portion, and a limit switch 4 is attached to the lower end of the frame 5. The lower end of the detection arm 3 is exposed, and the tilting of the detection arm 3 is detected by the limit switch 4 to electrically issue commands such as stopping the line.

A phototube 7 is provided in front of the detection roller 2 as described above, and the phototube 7 detects whether or not the steel plate 11 is on the table and commands the raising or lowering of the entire mechanism as described above. I am admonished to do so.

To explain the operation of the device according to the present invention as described above, the operation cylinder 6 is retracted and the entire mechanism is lowered from the pass line, and then the steel plate 11 is conveyed on the table roller 10, and the tip of the steel plate 11 is conveyed on the table roller 10. 7, the cylinder 6 is actuated, the frame 5 rises, and the touch roll 1 comes into contact with the bottom surface of the steel plate 11. However, under normal feeding conditions, the detection roller 2 does not come into contact with the bottom of the steel plate 11, and the detection arm 3 and others It never works.

While working in this state, the steel plate 1 is overlapped as shown in Figure 1.
When the lower steel plate 1a is carried in, the tip of the lower steel plate 11a enters with a step corresponding to the thickness of the plate, so the detection roll 2 detects the entry of the lower steel plate 11a, and tilts the detection arm 3 to activate the limit switch. 4 to obtain commands such as line stop or alarm.

Note that the touch roller 1 and the phototube 7 are connected to each other as shown in the figure.
Although it is preferable to provide the touch roller 1 slightly further rearward, such a relationship can be changed as appropriate and the arrangement may be made, for example, the touch roller 1 may be placed at the same position with respect to the traveling direction of the line.

It goes without saying that instead of using the operating cylinder 6, the frame may be raised using a suitable spring, and the entry of the steel plate 11 can be visually confirmed and the frame raised manually.In this case, the phototube 7 is not required. However, even in this way, it is possible to effectively detect the introduction of duplicate steel plates 11a, as described above.

Furthermore, the present invention can be applied not only to a leveler but also to any other device that transfers and processes steel plates one by one.

According to the present invention as explained above, duplicate transfer of steel plates can be effectively detected below the transfer line, and in particular complex transfers that are not of a fixed length or are transferred in a composite manner at the bottom and cannot be detected visually by the operator. This automatically and accurately detects the problem and stops the line or issues an alarm, thus avoiding damage to the leveler roll and eliminating the need for a relatively long line stop or repair caused by double jamming. In addition, the upper part of the transfer level is sufficiently opened and does not cause any trouble in the transfer operation of this type of steel plate, and is a highly effective device in practical use.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a side view of the device according to the invention, and FIG. 2 being a front view thereof. However, in these drawings, 1 is a touch roll, 2 is a detection roll, 3 is a detection lever, 4 is a limit switch,
5 is a frame, 6 is an operating cylinder, 7 is a photocell, 10
1 is a table roller, and 11 is a steel plate.

Claims (1)

[Scope of utility model registration request] A vertically movable frame is provided below between the table rollers constituting a roller table for transferring the steel plate, and a rotatable touch roll is provided on the upper part of the frame, and an upper end of the outer periphery of this touch roll is provided on the upstream side of the touch roll. The detection arm is pivotably mounted with a detection roller positioned low within the range of the thickness of the steel plate to be transferred, and
An apparatus for detecting redundant transfer of steel plates, characterized in that a limit switch is provided for detecting tilting of the detection arm.