KR100270396B1 - Auto control device of a tong crane - Google Patents

Abstract

PURPOSE: A control device for slab sheets of tong crane is provided to prevent a slab falling accident by slab sheet misoperation of a driver and to decrease work load of a lower-place-worker by preventing a stock and mixed loading of slab for maintaining stable work and for enhancing productivity. CONSTITUTION: An automatic program of C.L.T.S(1) is developed to control on/off of selection switches(21¯24) of slab 1, 2, 3, 4 sheets equal to an order slab sheet during sending of order. A slab sheet order value(A) depending on selection of the slab sheet of four sorts is used to compare with a current supporting block positional value(B) for generation of up/down output and to select a slab sheet automatically by connecting to a supporting block control panel. Moreover, automatic and manual modes are divided to use upon demand of the driver. An action finish value of the supporting block is output to a digital display(25) so 'E' is displayed in case of mechanical action unavailable and an alarm sound is functioned.

Description

Automatic adjustment of slab number of tong crane

The present invention relates to a device for automatically adjusting the number of slabs of a tong crane, and more particularly, to an apparatus for automatically adjusting the number of slabs of a tong crane to be automatically adjusted according to the number of slabs indicated by the supporting block of the overhead crane.

In general, the tong crane (Tong Crane) is performed by a ground station CLTS (1; Crane Location Tracking System), as shown in Figure 2, the terminal 3 of the information receiving device in the cab of the next station (2) The driver selects the slab sheet manipulation device 4 and performs the work according to the contents of the work order screen.

The barrel 11 (Tong) of the tong crane as shown in FIG. 1 is provided with two pairs of supporting blocks 12, 12 'according to the work instructions of the crane made by the crane automation program slab 1 In the cab, the driver presses the manual operation selection button (5 to 7) to perform the up and down, or the operation by the up / down manual lever (8). The supporting block 12, 12 'attached to the barrel 11 of the crane moving through the slab moves up and down according to the corresponding number of controls, and the motor moves by the limit switch when the corresponding value is selected. (M) The power supply is shut off and stopped.

As described above, in the process of transporting heavy materials 13 (slaves) by designating the number of slabs, bottle-shaped operations such as traveling, traversing, hoisting and hoisting are performed during manual operation selection buttons 5 to 7 and manual lever 8, which are manual operations. Error occurs in the process of concentration dispersion and visual inspection of the indicator (9), and the slab fall accident occurs in the facility as a factor that may occur when the slab is transported due to wrong selection of the number of pieces. In the crane running, the actual work is performed inconsistent with the work order value and the slab stock is mixed, causing an accident of information. Accordingly, there is a problem that causes a cost increase because it causes a huge loss, such as post-process production plan modification.

The present invention has been invented to solve the problems of the conventional slab number adjusting device of the tong crane in view of the above situation, the on-line selection of the selection of slab number of the tong crane automatically by the driver, the slab of the crane Trip alarm device is provided when the motor trips during the number operation, and the number of slabs can be eliminated. It prevents misoperation of slabs and prevents linkage between slab inventory and equipment accidents. It also provides an automatic control device for slab number of slabs, which reduces the crane operator's work load, improves the accuracy and efficiency of the information supply system. There is a purpose.

1 is a configuration diagram of a tong crane (Tong Crane),

2 is a block diagram of a conventional slab number adjustment device of a crane;

Figure 3 is a schematic block diagram of the slab number adjustment apparatus of the present invention crane;

4 is a detailed circuit diagram of the slab number adjustment device of the present invention crane;

5 is a flowchart illustrating the operation of the slab number adjustment apparatus of the present invention.

<Description of the code | symbol about the principal part of drawing>

1: Ground station C.L.T.S 2: Second station

3: terminal (information receiving device) 4: slab purchase operation device

5 ~ 7: Manual operation selection button 8: Up / down manual lever

9: indicator 11: Tong

12,12 ': Supporting block 13: Heavy material (slab)

14: bogie 15,15 ': wheel

16,16 ': Rail 17: Digital Display

31: Quantity command signal input unit 32: Supporting block position signal input unit

33: comparison unit 34: drive control unit

In order to achieve the above object, the present invention provides a device for automatically adjusting slab number of slabs, which includes a resistor (R ₁ to R ₈ ) and a photocoupler for inputting a command signal (A ₁ to A ₄ ) which is a slab number indicating value (A). A purchase command signal input unit 31 including P _A1 to P _A4 , an integrated circuit IC ₁ , and inverters IV ₁ to IV ₃ ; Resistor (R ₉ to R ₁₆ ), photocoupler (P _B1 to P _B4 ), integrated circuit (IC ₂ ), and inverter that input the setting signals (B ₁ to B ₄ ) which are the current supporting block position values (B) IV ₄ ~ IV ₆ ) supporting block position signal input unit 32; A comparison unit 33 for comparing the slab number indicating value A with the supporting block position value B; NAND gates (ND ₁ ), (ND ₂ ) and OA gates (OR ₁ ), (OR ₂ ), LEDs (LP ₁ ), (LP ₂ ), transistors (Q ₁ ), (Q ₂ ), relay (RY ₁₎ ), (RY ₂ ), relay switch (LS ₁ ), (LS ₂ ), connector (CT ₁ ), (CT ₂ ) and resistor (R ₁₇ ~ R ₂₂ ) according to the output of the comparison unit 33 Characterized in that it comprises a drive control unit 34 for driving control of the supporting block.

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

The present invention develops the automation program of the ground station CLTS (1) shown in Fig. 2, one slab, two slabs, slabs in the same manner as the number of slabs instructing the dispatch of work orders to the vehicle information station (3) cab information supply device (3). 3 sheets and 4 slab selection switches 21 to 24 are turned on and off (FIG. 3), and the current supporting block position value (A) is used by using the slab number indication value A according to the four types of slab selection. Generates up / down output (A <B = down, A> B = up, A = B = stop) compared to B) and connects to the supporting block control panel (4). It is configured as shown in FIG. 4 so that it can be selected, and the auto / manual (FIG. 2) can be selected and used when the driver needs it, and the supporting block operation completion value is output to the digital display 25 so that mechanical operation is not possible. Slab count with alarm music function and "E" display at the same time The controller was configured.

FIG. 5 is a flowchart illustrating an operation of the automatic apparatus for adjusting the number of slabs of the present invention. For example, in order to lift three slabs, the three slab selection switches 23 are pressed. Accordingly, the buy command signal input unit shown in FIG. A high level signal is applied to the resistor R ₃ at 31 and no signal is applied to the resistors R ₁ , R ₂ , and R ₄ . Accordingly, only the photocoupler P _{A3 of the} photocouplers P _A1 to P _A4 operates so that only the output of the inverter IV ₃ of the inverters IV ₁ to IV ₃ becomes a low level signal, and the inverters IV ₁ , The output of (IV ₂ ) goes high. In this case, if the current supporting block position value B is two slabs, the supporting block position signal input part is because only the setting signal B ₂ among the setting signals B ₁ to B ₄ is a high level signal and the rest is a low level signal. Only photocoupler P _B2 in (32) is operated so that only the output of inverter IV ₅ of inverters IV ₄ to IV ₆ becomes a low level signal. Accordingly, the comparator 33 determines that A> B, and outputs a high level signal using only the output terminal A> B, and outputs a low level signal to the other output terminals. Accordingly, since the output of the NAND gate ND _{1 of} the driving controller 34 becomes a high level signal and the transistor Q ₁ is turned on, the relay RY ₁ is operated to connect the connector (LS ₁ ) by the relay switch LS ₁ . The supporting block is up controlled by the operation of the motor M connected to CT ₁ ), and the LED LP ₁ is turned on to indicate the up control of the supporting block.

On the other hand, if the current supporting block position value B is three slabs when three slabs are selected, the same operation as described above, the high level signal using only the output terminal (A = B) of the comparator 33 And other low level signals are output to the output terminals and the transistors (Q ₁ ) and (Q ₂ ) are turned off, so the relays (RY ₁ ) and (RY ₂ ) do not operate. The slab is picked up while still in its current state.

In addition, if the current supporting block position value (B) is 4 when selecting 3 slabs, it operates as described above to control the supporting block further down by the value corresponding to 1 slab, and then pick up the slab. do.

The slab number automatic adjustment device of the present invention, which functions as described above, automatically supports the support block according to the number of slabs, without the driver having to view the indicator and operate the supporting block up / down lever. As it can be adjusted, it is possible to prevent the slab fall accident caused by the wrong number of slabs of the operator, and to reduce the workload of the lower workers by preventing stocks and mixing of the slabs, thus maintaining stable operation and improving productivity. .

Claims (1)

Resistor (R ₁ to R ₈ ), photocoupler (P _A1 to P _A4 ), integrated circuit (IC ₁ ), and inverter (IV ₁ ) for inputting the command signals (A ₁ to A ₄ ) that are the slab number indication value (A) A buy command signal input unit 31 consisting of ˜IV ₃ ); Resistor (R ₉ to R ₁₆ ), photocoupler (P _B1 to P _B4 ), integrated circuit (IC ₂ ), and inverter that input the setting signals (B ₁ to B ₄ ) which are the current supporting block position values (B) IV ₄ ~ IV ₆ ) supporting block position signal input unit 32; A comparison unit 33 for comparing the slab number indicating value A with the supporting block position value B; NAND gates (ND ₁ ), (ND ₂ ) and OA gates (OR ₁ ), (OR ₂ ), LEDs (LP ₁ ), (LP ₂ ), transistors (Q ₁ ), (Q ₂ ), relay (RY ₁₎ ), (RY ₂ ), relay switch (LS ₁ ), (LS ₂ ), connector (CT ₁ ), (CT ₂ ) and resistor (R ₁₇ ~ R ₂₂ ) according to the output of the comparison unit 33 Slab number automatic adjustment device of the barrel crane, characterized in that consisting of a drive control unit 34 for driving control of the supporting block.