JPH06183545A - Method and device for reading discrimination display of cylindrical workpiece - Google Patents

Abstract

PURPOSE:To accurately and smoothly carry out operation control while accurately deciding a cylindrical workpiece for whether it is good or not, by accurately and surely reading a discrimination display through a reader. CONSTITUTION:In the case that a cylindrical workpiece K in a down end attitude of applying a discrimination display T in the peripheral surface is transfer fed in a vertical transfer feed path, an external diameter of the cylindrical workpiece is measured by a light shielding external diameter detector 2, and in accordance with this measured value, a mover 4 adjusts a position, along the read direction of a reader 3, displaced, to attain reading the discrimination display T by the reader 3. In this way, a constitution and control of position adjusting the reader 3 can be easily and accurately performed, to safely and automatically attain reading the discrimination display T.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys an identification mark such as a bar code label provided on the outer peripheral surface of a cylindrical work such as a coil which is a hot rolled or cold rolled thin plate product. The present invention relates to a method and a device for reading on the way.

[0002]

2. Description of the Related Art Conventionally, an identification mark such as a bar code label is provided on the outer surface of a product itself or a work such as a box packed in a box, and this identification mark is read during the manufacturing process or before the shipment of the final process, The method of confirming and recognizing the actual product and inputting the result to a higher-level computer is widely used in the field of physical distribution management.

According to this method, a reading device for reading the identification display is fixed, and when the work is moved and conveyed near the side of the reading device, the identification display provided on the work is read or the work is being conveyed. Is stopped at a fixed position and the reading device is moved at this position to read the identification display of the work. The reading work is performed in the middle of the conveyance path formed by the roller conveyor, belt conveyor, etc. Has become.

Further, a cylindrical work such as a coil which is a hot-rolled or cold-rolled thin plate product is manufactured in a factory and is sorted from a transportation path in the factory in a state where an outer peripheral surface is provided with an identification mark. Although it is carried out to a warehouse outside the factory, when a large amount of cylindrical work is carried in from the factory like a beach warehouse, efficient and safe transfer of the cylindrical work from this factory to the warehouse is achieved. In order to do so, a dedicated transfer path is provided between the factory and the warehouse so that the cylindrical workpiece manufactured in the factory is directly carried into the warehouse.

In this case, since the factory and the warehouse are separate buildings, and a traffic route is generally formed between them, the dedicated transport route is elevated or underground so as not to interfere with this traffic route. Therefore, a vertical transfer path is provided between the in-plant transfer path and the dedicated transfer path.

[0006] The transport path formed between the factory and the warehouse, which is composed of the horizontal path portion and the vertical path portion, is a dedicated path for unloading cylindrical workpieces from the factory to the warehouse. If the cylindrical work carried out is wrong, the correction process will be extremely difficult.Therefore, it is possible to accurately and surely confirm the quality of the cylindrical work carried out from the factory to the warehouse by this dedicated transfer path. Need to be judged.

It is most effective and accurate to judge the quality of the cylindrical work carried out from the factory to the warehouse by the dedicated carrying path by reading the identification mark given to the cylindrical work.

[0008]

However, when the above-mentioned conventional technique for reading the identification mark is applied to a cylindrical work such as a coil which is a hot-rolled or cold-rolled thin plate product, the width of the cylindrical work is increased. In addition, since there are various outer diameters, there is a problem in that even if a reader, which is a commonly used reader, is brought, it cannot be easily applied in terms of functionality.

That is, since the reader naturally has a reading range, it is necessary to position the identification mark on the outer peripheral surface of the cylindrical work within the reading range of the reader. The identification mark given to the outer peripheral surface of the cylindrical work changes its height position and the position in the width direction of the conveyance path according to the change of the outer diameter of the cylindrical work. It is necessary to follow the change in alignment, which complicates the reader mounting mechanism and requires accurate follow-up alignment control. Accidents in which the vehicle collides with and is damaged easily occur.

For example, Japanese Unexamined Patent Publication (Kokai) No. 60-257283 discloses a marking device for automatically marking an identification mark on the outer surface of a cylindrical work which is a rolled product coil. At present, there is no method for automatically reading the identification mark provided on the outer peripheral surface of the work piece.

The cylindrical workpiece manufactured in the factory is
According to the identification display, sorting is arranged on the transportation path in the factory, but the sorting of the cylindrical work on the factory side is
Only the sorting on the transport path in the factory, the quality of the cylindrical work carried out from the factory to the warehouse by the dedicated transport path,
There was a problem that the warehouse side could not make a decision, and therefore there is a risk that the cylindrical workpiece may be erroneously taken out from the factory to the warehouse.

Therefore, the present invention was devised in order to solve the above-mentioned problems in the prior art, and it is technically possible to read the identification display of the cylindrical workpiece being transferred by an optical reader without contact. An object of the present invention is to accurately and surely determine the quality of a cylindrical work to be conveyed, and to enable subsequent operational management of a cylindrical work to be accurate and smooth.

[0013]

Means for Solving the Problems The means of the present invention for attaining the above-mentioned technical object is an optical system for vertically transferring a cylindrical work piece in a down-end posture with an identification mark on its outer peripheral surface. Measuring the outer diameter of the cylindrical work by the dynamic measuring means, and according to the measured value of the outer diameter of the cylindrical work by the optical measuring means, it is arranged downstream of the optical measuring means along the vertical transfer path. The position of the optical reading means along the reading direction is adjusted, and the optical reading means whose position is adjusted along the reading direction allows the cylindrical shape to pass immediately before the optical reading means along the vertical transfer path. It is to read the identification mark of the work.

The constituent means of the present invention for carrying out the method means of the present invention is provided at the starting point of the vertical transfer path formed by the hoisting device, and is for a cylindrical work piece in a down-end posture in which the outer peripheral surface is provided with an identification mark. Having a light-shielding outer diameter detector that measures the outer diameter from the height, is arranged on the downstream side of the light-shielding outer diameter detector along the vertical transfer path formed by the suspension device, and Having a reader that optically reads the identification mark of the cylindrical work passing through, this reader is assembled and fixed, and it is displaced along the reading direction of the reader according to the measurement value of the light-shielding outer diameter detector. To have a moving body.

It is advantageous in practice and handling that the identification mark provided on the outer peripheral surface of the cylindrical work is a bar code.

In order to prevent destruction of the reader due to collisional interference with the cylindrical work, it is effective to pin the movable body at the base end opposite to the vertical transfer path so that it can pivot in the vertical direction. is there.

[0017]

Since the outer diameter of the cylindrical work is read and the identification display is read while the cylindrical work is positioned on the vertical transfer path, the position of the identification display along the widthwise direction of the vertical transfer path is the cylinder. It is always constant regardless of the change in the outer diameter of the workpiece, so that the mounting of the reader need not be displaceable in the width direction of the vertical transfer path.

On the other hand, the depth direction of the vertical transport path of the identification display, that is, the position along the reading direction of the reader changes according to the change in the outer diameter of the cylindrical work, so that the identification display can be read by the reader. The reader is displaceably mounted along its reading direction so as to be located therein and so that the reader does not collide with the cylindrical workpiece in transit.

Therefore, first, the outer diameter of the cylindrical work is measured by the optical measuring means in a state where the cylindrical work is positioned in the vertical transfer path. The position along the depth direction, that is, the position along the reading direction of the optical reading means is calculated.

In accordance with the result of this calculation, the optical reading means has a position along the reading direction in which the identification mark of the cylindrical work passing through the vertical transfer path is located within the reading range, and the optical reading means part is vertically transferred. The displacement is adjusted to a position where it does not collide with a cylindrical work passing through the road.

The transfer of the cylindrical work along the vertical transfer path is performed in a state where the position adjustment of the optical reading means is completed. Therefore, when the cylindrical work passes in front of the optical reading means, the identification mark surely passes within the reading range of the optical reading means, and the passing cylindrical work collides with the optical reading means. There is nothing to do.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall side view showing an embodiment of a reading device 1 according to the present invention, which is arranged along a vertical transfer path formed by a lifting device 15, and serves as an optical measuring means arranged at a starting point of the vertical transfer path. Light-shielding outer diameter detector 2
And a reader 3 as an optical reading means portion arranged downstream of the light-shielding outer diameter detector 2 along the vertical transfer path, and the reader 3 is attached and fixed, in the depth direction of the vertical transfer path, That is, it is composed of a movable body 4 which is provided so as to be displaceable along the reading direction of the reader 3.

The light-shielding outer diameter detector 2 is composed of a light projecting body 2a and a light receiving body 2b which are opposed to each other with a vertical transfer path interposed therebetween, and the light projecting body 2a is provided near the vertical transfer path. It is arranged in the middle of the column 12 standing upright along the vertical transfer path so that the detection light is horizontally irradiated toward the vertical transfer path, while the light receiving body 2b sandwiches the vertical transfer path. On a side opposite to the support column 12, a support column 13 is provided upright along the vertical transfer path in a posture of receiving light from the light projecting body 2a.

The reader 3 is the same as a conventional bar code reader, and is attached to the upper end of the column 12 via the moving body 4 in a posture in which the reading direction matches the depth direction of the vertical transfer path. .

The movable body 4 (see FIG. 2) having the reader 3 attached and fixed to the tip of the upper surface is slid along the reading direction on the upper surface of the elongated box-shaped frame 7 fixed to the upper ends of the columns 12. It is assembled as possible. The moving body 4 is assembled to the frame 7 by mounting the ball screw 8 rotatably mounted in the frame 7 by the bearings 9 and 9 with the axis along the reading direction, and the nut portion 5a as the lower end. At the upper end of the movable support base 5 screwed onto the upper surface of the frame 7,
This is achieved by pinning the rear end of the moving body 4 with a shaft pin 6.

Since the shaft pin 6 is in a horizontal posture along the widthwise direction of the vertical transfer path, the movable body 4 has a horizontal posture.
Is rotated along the vertical direction with the rotation axis as the rotation axis, and the tip end to which the reader 3 is attached is displaced in the direction of retracting from the vertical transfer path by the rotation from the horizontal posture to the upright posture direction.

A motor brake 10 is attached to a rear end surface of the frame 7, that is, an end surface opposite to the vertical transfer path side, and an output shaft of the motor brake 10 is connected to a ball screw 8 via a coupling 11. The ball screw 8 is rotated by the drive of the motor brake 10, and the moving body 4 is moved forward and backward together with the reader 3.

As shown in FIG. 4, the identification mark T for the cylindrical work K such as rolled product coil is displayed by attaching a bar code-printed label at the widthwise center of the outer peripheral surface horizontal position of the cylindrical work K. It is achieved by means such as wearing.

By the way, the reading range W of the reader 3
As shown in FIG. 3, the lower limit of the reading range width H (particularly, the range width in the lateral width direction shown in FIG. 4) is the lateral width of the identification display T and the position of the identification display T with respect to the outer peripheral surface of the cylindrical work K. Since the range width H is determined according to the delivery accuracy, it is determined by setting the range distance L so that the range width H does not become less than the determined value, and the displacement of the reader 3 in the reading direction is determined by the cylindrical work K. The identification display T of is to be passed under the reading range W as a limit condition.

For measuring the outer diameter of the cylindrical work K, the cylindrical work K to be carried out through the vertical transfer path is mounted on the conveyor 14 forming the carry-out path of the factory and conveyed, and the vertical structure formed by the lifting device 15 is formed. It is performed when the vehicle is stopped at the starting point of the transfer path.

That is, in the illustrated embodiment, the light-shielding outer diameter detector 2 is composed of a pair of a light emitter 2a and a light receiver 2b arranged at a set height position, and is attached to the conveyor 14. The upper end portion of the cylindrical work K stopped at the starting point of the vertical transfer path in the mounted state is the light emitter 2a and the light receiver 2
The size of the outer diameter of the cylindrical work K is classified according to whether or not the space between b and b is shielded.

In short, the light-shielding outer diameter detector 2 determines whether or not the height of the cylindrical work K in the down-end posture on the conveyor 14 stopped at the starting point of the vertical transfer path is larger than a preset value. Therefore, the outer diameter of the cylindrical work K transferred from the vertical transfer path by the lifting device 15 is
It detects whether it is large or small.

Therefore, the moving body 4 moves back and forth between the two positions according to the detection result of the light-shielding outer diameter detector 2, and when the outer diameter of the cylindrical work K is small, it is moved forward (transferred). Direction toward the cylindrical work K), and the cylindrical work K
When the outer diameter of is large, it retreats (in the direction away from the transferred cylindrical work K).

The reason why the reading position of the reader 3 is set at two positions is that the outer diameter change range of the cylindrical work K is smaller than the range distance L of the reading range W of the reader 3. However, when the outer diameter change range of the cylindrical work K is large, the outer diameter of the cylindrical work K is detected in several stages (if a plurality of combinations of the light emitter 2a and the light receiver 2b are provided. Then, the stop position of the reader 3 may be set in several stages corresponding to this.

Due to the malfunction of the light-shielding type outer diameter detector 2, the malfunction of the moving body 4, the deformation of the cylindrical work K, and the like, the cylindrical work K being transferred to the moving body 4 from below is moving along the vertical transfer path. Even if a collision occurs, the moving body 4 is pushed up by the cylindrical work K due to the contact with the cylindrical work K at its tip end and is rotated about the shaft pin 6 (FIG. 2).
Expensive reader 3
There is no inconvenience of being damaged.

[0036]

Since the present invention has the above-mentioned structure, it has the following effects. Since the identification mark on the outer peripheral surface of the cylindrical work in the down-end posture is read during the vertical transfer of this cylindrical work, the height position of the reader can be adjusted in accordance with the change in the outer diameter of the cylindrical work. This eliminates the need for adjustment and adjustment of the position of the reader, which makes it possible to make the reading of the identification mark by the reader reliable and accurate, which makes unmanned reading of the identification mark safe. And it can be implemented easily.

The reading of the identification display of the cylindrical work is carried out on the vertical transfer path which is the start portion of the dedicated transfer path branched from the factory to the warehouse, so that it is carried in on the branched transfer path side. It is possible to directly confirm the actual product of the cylindrical work, and it is possible to reliably prevent erroneous loading of the cylindrical work into the branched transport path side, and this read information allows the operation of the cylindrical work on the branched transport path side. The management can be performed accurately, safely, efficiently and automatically by using a computer or the like, and thus, the labor saving of the transportation and operation management of the cylindrical work can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment in which the present invention is arranged along a vertical transfer path.

FIG. 2 is a side view showing an embodiment of the optical reading means in the embodiment shown in FIG.

FIG. 3 is an explanatory diagram showing a positional relationship between a reading range of a reader and an identification display of a cylindrical work during a reading operation.

FIG. 4 is an overall perspective view showing an embodiment of identification display on the outer peripheral surface of a cylindrical work.

[Explanation of symbols]

1; reading device 2; light-shielding outer diameter detector 2a; light emitter 2b; light receiver 3; reader 4; moving body 5; moving support 5a; nut portion 6; shaft pin 7; frame 8; ball screw 9; Bearing 10; Motor brake 11; Coupling 12; Post 13; Support post 14; Conveyor 15; Lifting device K; Cylindrical workpiece T; Identification display W; Reading range L; Range distance H; Range width

Claims (4)

[Claims] 1. When a cylindrical work (K) in a down-end posture having an identification mark (T) on the outer peripheral surface is transferred in the vertical direction, an optical measuring means is used to remove the outside of the cylindrical work (K). The diameter is measured, and according to the measured value, along the vertical transfer path, the position is adjusted along the reading direction of the optical reading means arranged on the downstream side of the optical measuring means,
The cylindrical work passing by the optical reading means
How to read the identification display of the cylindrical work that reads the identification display of (K). 2. From the height of a cylindrical work (K) in a down-end posture, which is provided at the starting point of the vertical transfer path formed by the lifting device (15) and has an outer peripheral surface with an identification mark (T), A light-shielding outer diameter detector (2) for measuring the outer diameter, and the cylindrical work (K) which is arranged downstream of the light-shielding outer diameter detector (2) along the vertical transfer path and passes through. Reader (3) for optically reading the identification display (T) of the device, and the reader (3)
Assembling and fixing, and an identification display of a cylindrical work consisting of a moving body (4) which is displaced along the reading direction of the reader (3) according to the measurement value of the light-shielding outer diameter detector (2). Reader. 3. The identification display reading device for a cylindrical work according to claim 2, wherein the identification display (T) is a bar code. 4. The movable body (4) is pinned so as to be vertically pivotable at a base end opposite to the vertical transfer path.
The identification display reading device for a cylindrical work according to.