JP2000085943A - Conveying table drive control procedure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control drive of a conveying table to stop a work at a designated location during conveying operation and to reduce a conveying time. SOLUTION: Conveying a preceding work 1 on a second conveying table B is started, and conveying a following work 2 on a first conveying table A is started at the time when the preceding work 1 is conveyed to a designated distance. A control to reduce the speed of the first and second conveying tables A, B is started at the point when the preceding work 1 is transferred onto the third conveying table C, at a length of not less than (y) which the allows third conveying table C to convey the work 1, and a control to stop the following work 2 at the designated location on the second conveying table B is done.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the driving of a transfer table which is provided along a transfer direction for transferring a plurality of conveyed goods in series, and more particularly to a method for controlling the driving of a steel sawing equipment. The present invention relates to a transfer control method for a transfer table for improving the transfer efficiency in a transfer device in which it is essential to stop the transferred object halfway.

[0002]

2. Description of the Related Art Conventionally, as a method for improving the transport efficiency when a plurality of transported articles are transported in series on a table for transporting them, it is effective to reduce the interval between the transported articles. As shown in the figure, when the preceding material 1 has moved onto the second transport table B, the speed of the second transport table B is reduced (see FIG. 2), and while tracking the tail end position of the preceding material 1, Generally, the following material 2 is conveyed on the first conveyance table A, and then conveyed after the distance between the preceding material 1 and the following material 2 is reduced (see FIG. 2).

However, in this method, for example, when it is necessary to cut the following material 2 in the middle of the conveyance, the following material 2 is designated on the second conveyance table B at the position of the cutting device, for example. Could not be stopped at the place where it was.

Conventionally, as shown in FIG. 3, for example, a first transfer table A and a second transfer table B (located at a sawing device) are arranged from the upstream side to the downstream side. ) And the third transport table C are sequentially arranged, and the time when the entire length of the preceding material 1 transported on the second transport table B is transferred to the third transport table C (see FIG. 1), the transport of the following material 2 on the first transport table A is started, and the first transport table A and the first transport table A are configured such that the trailing material 2 stops at a predetermined position of the second transport table B after the start. Second
The deceleration control of the transfer table B is performed.

However, in this drive control method, there is a disadvantage that the transport time cannot be reduced because the distance between the preceding material 1 and the following material 2 cannot be reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned disadvantages, and it is possible to stop a succeeding material at an arbitrary position independently of a preceding material and to shorten a transport time. It is an object of the present invention to provide a drive control method for a transport table that can achieve the above.

[0007]

In order to achieve the above object, a drive control method for a transport table according to the present invention comprises a first transport table, a second transport table and a second transport table. And a drive control method of a transfer table in a transfer device having a third transfer table connected in series, wherein the transfer of the preceding transfer object on the second transfer table is started and the preceding transfer object has advanced a predetermined distance. At this time, the transport of the succeeding transport object on the first transport table is started, and when the preceding transport object has moved onto the third table by a length that can be transported by the third transport table or more, the first transport object is moved to the third transport table. The deceleration control of the first and second transport tables is started, and control is performed such that the succeeding transport object stops at a predetermined position on the second transport table.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is an explanatory diagram for describing a drive control method of a transport table according to an embodiment of the present invention, and FIG. 1B is a diagram illustrating a relationship between speed and time in first to third transport tables. It is a graph which shows a relationship.

In this embodiment, as shown in FIG.
The first transport table A and the second transport table A extend from the upstream side to the downstream side.
When the transfer table B and the third transfer table C are sequentially connected, the preceding material 1 transferred on the second transfer table B contains at least the third transfer table C on the third transfer table C. (In this embodiment, the value of y is set to １ ／ of the total length of the preceding material 1, but is not particularly limited, and can be changed as appropriate. When the position detecting means (not shown) detects that the vehicle has moved by the distance, the control device responds to the detection signal and the first and second transport tables A, The deceleration control of the drive circuit of B is started, and the following material 2 is stopped at a predetermined position of the second transport table B for a predetermined time.

Here, the position detecting means can be constituted by, for example, a pulse generator and an arithmetic means in the control device. The start timing of the transport of the following material 2 on the first transport table A is set so that the trailing material 2 can be finally stopped at a fixed position on the second transport table B in a short time. Is detected by the position detecting means, the control device controls the drive circuit of the first transport table A according to the detection signal to start transporting the following material 2.

The embodiment will be described in more detail as follows. In FIG. 1, for example, the sawed preceding material 1 is arranged at a predetermined position of the second transport table B in a stopped state, and the following material 2 to be sawed from now on the first transport table A is stopped. It is arranged in.

First, the control device starts up the drive circuits of the second and third transfer tables B and C so that the preceding material 1 on the second transfer table B is directed toward the third transfer table C at a predetermined speed. Transport.

At this time, the upstream end of the preceding material 1 is detected by the position detecting means, and the position detecting means detects the upstream end of the preceding material 1 for a predetermined distance (after the upstream end of the preceding material 1 is placed on the first transport table A). When it is detected that the lead has progressed from the downstream end of the material 2 by the set interval x), the control device responds to the detection signal to cause the control device to perform the first operation.
The drive circuit of the transfer table A is started, and the following material 2 is transferred toward the second transfer table B at a predetermined speed (FIG. 1).
Reference).

Next, the preceding material 1 transported on the second transport table B is placed on the third transport table C, for example, by one full length.
When the position detecting means detects that the preceding material 1 has become ready to be conveyed by the third conveying table C after moving by the length y of / 2, the control device responds to the detection signal, Then, the deceleration control of the drive circuits of the second transport tables A and B is started (see FIG. 1), the trailing material 2 is stopped at a predetermined position on the second transport table B for a predetermined time, and then the sawing is performed. (See FIG. 1).

In FIG. 1, reference numeral 3 denotes a trailing material 2
Corresponds to the following material when the preceding material is used, for example, the following material 2
Is transported onto the first transport table A during sawing.
Then, for the preceding material 2 and the following material 3, the same transport control as in the case of the preceding material 1 and the following material 2 is performed.

As is apparent from the above description, in this embodiment, the leading material 1 is placed on one second transport table B.
And the following material 2 can be transported at the same time,
As compared with the conventional case in which the preceding material 1 passes through the second transport table B and starts transporting the following material 2 on the first transport table A, the preceding material 1 and the following material 2 Can be shortened, and as a result, the transport time can be shortened.

[0017]

As is apparent from the above description, according to the present invention, it is possible to stop a transported article at a fixed position in the middle of transporting and shorten the transporting time.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram for explaining a drive control method of a transport table according to an embodiment of the present invention;
(B) is a graph which shows the relationship between speed and time in the first to third transport tables.

FIG. 2 is an explanatory diagram for explaining a conventional drive control method of a transport table.

FIG. 3 is an explanatory diagram for explaining a conventional drive control method of a transport table.

[Explanation of symbols]

A: first transfer table B: second transfer table C: third transfer table 1 ... preceding material (preceding conveyed material) 2 ... succeeding material (subsequent conveyed material) x: set interval y: third Transfer length of preceding material that can be transported by transport table C

Claims (1)

[Claims] 1. A drive control method for a transport table in a transport device having a first transport table, a second transport table, and a third transport table connected in series from an upstream side to a downstream side in a transport direction. The transport of the preceding transport on the second transport table is started, and when the preceding transport has advanced a predetermined distance, the transport of the subsequent transport on the first transport table is started, and the preceding transport is started. Starts the deceleration control of the first and second transfer tables on the third table when the length of the second transfer table is equal to or more than the length that can be transferred by the third transfer table. A drive control method for a transport table, wherein the transport table is controlled to stop at a predetermined upper position.