KR20050015546A - Variable slab tong - Google Patents

Abstract

PURPOSE: Variable slab tongs are provided to transport the various slabs safely by gripping the slabs at the optimal position with the arms, and to improve working efficiency and the convenience of an operator by automatically adjusting the first arm and the second arm with the sensor and control unit. CONSTITUTION: Variable slab tongs are composed of an upper beam(110) lifting up and down by a wire rope and a sheave and having sliding grooves, a center beam(120) placed in the lower part of the upper beam and composed of sliding grooves, first tongs having a first upper bracket, a couple of first tension bars(134), a couple of first arms(136) combined with a first gripping jaw for gripping the slab and a first lower bracket(138), second tongs having a second upper bracket, a couple of second tension bars, a couple of second arms combined with a second gripping jaw and a second lower bracket, an upper screw bar(150) combined with the upper brackets, a lower screw bar combined with the lower brackets, a distance detecting sensor(170) detecting the end of the slab, a control unit regulating power supplied to the upper and lower screw bars, a supporting block(192) detecting the number of slabs, and a tong key and a tong key holder controlling the first and second arms.

Description

Variable slab tong

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab barrel, and more particularly to a variable slab barrel that can vary the spacing between a pair of first arms and a pair of second arms to stably hold slabs of various lengths. It is about.

In general, a steel mill is provided with a ceiling crane for transporting slab material, which is a steel sheet, in a rolling process, and the ceiling crane is provided with a slab barrel for gripping several slabs at once.

1A is a side view of a slab barrel according to the prior art, and FIG. 1B is a front view of a slab barrel according to the prior art.

The slab barrel according to the prior art includes an upper beam (11) which is raised and lowered by the action of the wire rope (1) and sheave (2); A center beam 12 positioned below the upper beam 11 and spaced apart from the upper beam 11 by a predetermined distance; A first upper bracket 13-1 fixedly coupled to one end of the upper beam 11 and a pair of first tension bars rotatably fastened to the first upper bracket 13-1. 13-2 and a first gripping jaw that is rotatably fastened to the pair of first tension bars 13-2 and extends to the bottom in an intersecting state and picks the slab S at the lower end thereof. jaw, 13-3a, a pair of first arms 13-3 fixedly fastened, a pair of first arms 13-3 and a first lower part fixedly coupled to one end of the center beam 12 A first tongs provided with a bracket 13-4; The second upper bracket 14-1 fixedly coupled to the other end of the upper beam 11 and the pair of second tension bars 14-2 rotatably fastened to the second upper bracket 14-1. And a second gripping jaw 14-3a, which is rotatably fastened one by one to the pair of second tension bars 14-2, extends to the bottom in a state where they cross each other, and picks up the slab S at the lower end thereof. A pair of fastened second arms 14-3, a pair of second arms 14-3 and a second lower bracket 14-4 fixedly coupled to the other end of the center beam 12 are provided. The second tongs; A supporting block 15 for detecting the number of slabs S to be gripped and transported by the first and second tongs; Ton key (not shown) and ton key holder for controlling opening and cross operation of the first and second arms 13-3 and 14-3 provided between the upper beam 11 and the center beam 12. (Not shown).

The detailed configuration and operation of the supporting block 15, the tongki and tongkey holder in the above are a number of patents and utility models, including the Republic of Korea Utility Model Registration No. 0208136 "Tank Key Safety Device for Ceiling Cranes" registered and filed by the applicant. Since it is disclosed in the case, the detailed description thereof will be omitted.

Referring to the process of gripping the slab is a slab barrel according to the prior art configured as described above are as follows.

Initially, the tongki is locked to the tongkey holder so that the pair of first arms 13-3 and the pair of second arms 14-3 remain open to both sides, and in this state the overhead crane driver Operates the wire rope 1 to lower the upper beam 11 until the supporting block 15 touches the upper surface of the slab S, between the pair of first arms 13-3 and between the pair of first arms 13-3. The slab S to be gripped is positioned between the second arms 14-3.

Thereafter, when the overhead crane driver lowers the upper beam 11 by a predetermined distance and then raises it again, the tong key locked in the tong key holder is released from the tong key holder and rises together with the upper beam 11, and the tong key is moved from the tong key holder. When it is detached, the pair of first arms 13-3 and the pair of second arms 14-3, which are opened in the open state, respectively retract to switch to the cross state, respectively, and hold both ends of the longitudinal direction of the slab S. Done.

However, in the slab barrel according to the prior art configured as described above, since the arms for holding the slab are fixedly coupled to the upper beam and the center beam through the upper and lower brackets, the distance between the first arm and the second arm is increased. Since it could not be changed, the length of the slab that could be gripped was limited.

That is, currently produced slabs vary in length from 1,500 to 5,500 [mm], and in order to hold the slabs of various lengths with one slab barrel, the distance between the first arm and the second arm of the slab barrel is the shortest length ( 1,500mm) slab, but the slab of various lengths are transported by using the slab barrel, the shorter slab has no difficulty, but for long slabs (for example, 5,500mm slab) The distance between the first arm and the second arm, which is the supporting point of the slab S, is too narrow for the length of the slab, so that the gripped slab is transported in an unstable state, such as being shaken left and right during transportation. There were many problems with risk.

Accordingly, the present invention is configured such that the distance between the first arm and the second arm for holding the slab can be varied so that the arms can always hold the slab at an appropriate position, and the arm is provided with a predetermined sensor and control unit. It is an object of the present invention to provide a variable slab barrel capable of stably holding slabs of various lengths in an optimal position by being able to be automatically placed in an optimal slab holding position.

In order to achieve the above object, the variable slab barrel according to the present invention is configured to raise and lower the upper beams having sliding grooves formed at both ends thereof; A center beam positioned below the upper beam by a predetermined distance from the upper beam and having sliding grooves formed at both ends thereof; A pair of first upper brackets rotatably coupled to the first upper bracket and rotatably fastened to the first upper brackets, the first upper brackets being coupled to the upper beams so as to be slidably movable along the one end side sliding grooves of the upper beams and having nut portions at positions corresponding to the sliding grooves; And a pair of first arms of the first tension bar of which are rotatably fastened one by one to the pair of first tension bars and extend to the bottom in an intersecting state, and the lower end of which is bent toward the center of the center beam. A first tongs having a first lower bracket fixedly coupled to the first arm of the pair and coupled to the center beam so as to be slidably moved along one end side sliding groove of the center beam, and having a nut portion formed at a position corresponding to the sliding groove. Wow; A second upper bracket coupled to the upper beam to be slidably movable along the other end side sliding groove of the upper beam and having a nut part at a position corresponding to the sliding groove, and a pair rotatably fastened to the second upper bracket A second tension bar of the pair of second arms which are rotatably fastened one by one to the pair of second tension bars and extend downward to the bottom, and wherein a lower end is bent toward the center of the center beam; A second lower bracket fixedly coupled to the second arm of the pair and coupled to the center beam to be slidably movable along the sliding groove on the other end side of the center beam, and having a nut portion formed at a position corresponding to the sliding groove; Tonswa; An upper screw bar fixedly installed in an inner space of the upper beam, and having threaded portions having opposite angles to threads at both ends thereof, the screwed portions being fastened with nut portions of the first and second upper brackets, respectively; A lower screw bar fixedly installed in an inner space of the center beam, and having threaded portions having opposite angles to threads at both ends thereof, the screwed portions being fastened with the nut portions of the first and second lower brackets, respectively; A power supply unit for supplying power to the upper screw bar and the lower screw bar, respectively; A distance detecting sensor installed at the fastening portion of the first tension bar and the first arm or the fastening portion of the second tension bar and the second arm to sense one end of the slab; When one end of the slab is detected by the distance sensor while the upper screw bar and the lower screw bar are being powered, the power supply unit is controlled after a predetermined time to cut off the power supplied to the upper screw bar and the lower screw bar. It characterized in that it comprises a control unit to make.

The power supply unit supplies power to a first drive motor for supplying power to the upper screw bar, a first power transmission chain for transmitting power of the first drive motor to a rotating shaft of the upper screw bar, and the lower screw bar. It is preferably composed of a second drive motor and a second power transmission chain for transmitting the power of the second drive motor to the rotating shaft of the lower screw bar.

Hereinafter, a variable slab barrel according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a is a side view of the variable slab barrel according to an embodiment of the present invention, Figure 2b is a front view of the variable slab barrel according to an embodiment of the present invention, Figures 3a and 3b is a top beam, an upper bracket and 4A and 4B are a plan view and a front view showing a coupling state of a lower beam, a lower bracket, and a lower screw bar, and FIG. 5A is a coupling of an upper screw bar and a first drive motor. 5B is a diagram illustrating a coupling state of a lower screw bar and a second driving motor, and FIG. 6 is a block diagram illustrating electrical connection between the first and second driving motors, the controller, and the distance sensor.

The variable slab barrel according to an embodiment of the present invention is raised and lowered by the operation of the wire rope (not shown) and the sheave (not shown), the upper beam 110 is formed with sliding grooves 112 and 114 in both ends. )and; A center beam 120 positioned below the upper beam 110 by a predetermined distance from the upper beam 110 and having sliding grooves 122 and 124 formed in both ends thereof; The first upper part is coupled to the upper beam 110 so as to be slidably moved along the sliding groove 112 on one end side of the upper beam 110, and the nut part 132-1 is formed at a position corresponding to the sliding groove 112. The bracket 132, a pair of first tension bars 134 rotatably fastened to the first upper bracket 132, and a pair of first tension bars 134 rotatably fasten one another and cross each other. To the pair of first arms 136 and the pair of first arms 136 to which the first gripping jaws 136-1, which extend to the bottom in the closed state and pick up the slab S, are fixedly fastened to the lower ends thereof. The nut part 138-1 is fixedly coupled and coupled to the center beam 120 so as to be slidably moved along the sliding groove 122 at one end of the center beam 120 and corresponding to the sliding groove 122. A first barrel provided with a first lower bracket 138; A second portion in which the nut part 142-1 is formed at a position corresponding to the sliding groove 114 and coupled to the upper beam 110 so as to be slidably moved along the sliding groove 114 at the other end side of the upper beam 110. The upper bracket 142, the pair of second tension bars 144 rotatably fastened to the second upper bracket 142, and the pair of second tension bars 144 are rotatably fastened one by one to each other. A pair of second arms 146 and a pair of second arms 146 which are secured to the second gripping jaws 146-1, which extend to the bottom in the crossed state and pick up the slab S at the lower ends thereof. Coupled to the center beam 120 so as to be slidably moved along the sliding groove 124 at the other end of the center beam 120, and the nut part 148-1 at a position corresponding to the sliding groove 124. A second tub provided with a second lower bracket 148 formed thereon; Screws 152 and 154 are fixedly installed in the inner space of the upper beam 110 and opposite end portions of the upper beams 110 are formed, respectively, and the screw portions 152 and 154 are formed of the first and second upper brackets 132. An upper screw bar 150 coupled to the nut parts 132-1 and 142-1 of 142, respectively; Screw parts 162 and 164 are fixedly installed in the inner space of the center beam 120 and opposite ends of the threaded portions 162 and 164 are formed, respectively, and the threaded parts 162 and 164 are formed of the first and second lower brackets 138. A lower screw bar 160 fastened to the nut parts 138-1 and 148-1 of 148, respectively; A power supply unit for supplying power to the upper screw bar 150 and the lower screw bar 160, respectively; A distance detecting sensor 170 installed on the first lower bracket 138 to detect one end in the longitudinal direction of the slab S; When the longitudinal end of the slab S is detected by the distance sensor 170 while the upper screw bar 150 and the lower screw bar 160 are being powered, the upper screw is controlled by controlling the power supply after a predetermined time. A controller 180 to cut off power supplied to the bar 150 and the lower screw bar 160; A supporting block 192 for detecting the number of slabs S to be gripped and transported by the first and second tongs; It is provided between the upper beam 110 and the center beam 120 and includes a tong 194 and a tongkey holder 196 for controlling the opening and cross operation of the first and second arms 136 and 146.

The pair of first and second arms 136 and 146 provided in the first and second tongs, respectively, has a lower end bent toward the center of the center beam 120 as shown in FIG. 2B. The slab barrel according to the prior art shown in FIGS. 1A and 1B is about the width of structures (such as the supporting block 192) located in the center between the upper beam 110 and the center beam 120 that were impossible to grip. Make sure to hold the slab as well.

Portions of the first and second upper brackets 132 and 142 coupled to the sliding grooves 112 and 114 of the upper beam 110 are respectively spaced apart from the sliding grooves 112 and 114 by a predetermined distance. It is possible to move smoothly along (112, 114). The same applies to the portion of the first and second lower brackets 138 and 148 coupled to the sliding grooves 122 and 124 of the center beam 120.

The distance sensor 170 may be installed on the second lower bracket 148 instead of the first lower bracket 138.

The power supply unit transfers power from the first drive motor 200 to the upper screw bar 150 and the first drive motor 200 to the rotating shaft of the upper screw bar 150. A second drive motor 210 for supplying power to the chain 202, the lower screw bar 160, and a second for transmitting the power of the second drive motor 210 to the rotating shaft of the lower screw bar 160 It consists of a power transmission chain 212.

On the other hand, when the first arm 136 and the second arm 146 picked up the slab (S), the optimal holding position that can keep the slab (S) stable without shaking the slab (S) to be gripped Since each position from 100 to 150 [mm] toward the longitudinal center of the corresponding slab (S) from both ends, the distance detection sensor 170 is mounted on the first lower bracket 138 and moves together with the first lower bracket 138 After calculating the time for the distance sensor 170 to move by a predetermined distance from the one end of the slab (S) in consideration of the moving distance with respect to time and then input the time calculated in advance to the controller 180 A pair of first arms 136 and a pair of second arms 146 sliding along the central side of the slab S together with the first and second lower brackets 138 and 148 on the slab S, respectively When the controller 180 reaches the optimal position for holding the arm 1 36, 146 can be stopped.

Referring to the process of gripping the slab variable slab barrel according to an embodiment of the present invention configured as described above are as follows.

Initially, the tongki is locked to the tongkey holder so that the pair of first arms 136 and the pair of second arms 146 remain open to both sides, and in this state, the overhead crane operator (Not shown) to lower the upper beam 110 until the supporting block 192 touches the upper surface of the slab S, thereby pairing the first arm 136 and pair of the second arm 146. The slab S to be gripped in between is positioned in the longitudinal direction.

Then, the overhead crane driver lowered the upper beam 110 by a predetermined distance when it is determined that the length of the slab S to be gripped is long so that it is not necessary to move the positions of the first and second arms 136 and 146. Is raised again so that the tong key, which is locked in the tong key holder, is released from the tong key holder and rises together with the upper beam 110, and when the tong key is released from the tong key holder, the pair of first arms 136, which are opened in an open state, The second arm 146 of the pair is retracted and switched to the cross state, respectively, to hold both ends of the longitudinal direction of the slab S.

On the other hand, when it is determined that the length of the slab S to be gripped is short and it is necessary to move the positions of the first and second arms 136 and 146, the overhead crane driver may have the first drive motor 200 and the second drive motor. A pair of first tension bars 134 and a pair of first arms 136 coupled to the first upper bracket 132 and the first lower bracket 138 to drive the 210 to the first upper bracket 132 and the first lower bracket 138 to slide toward the center of the upper beam 110 and the center beam 120 (from left to right in Fig. 2b), the second upper bracket 142 and the first A pair of second tension bars 144 and a pair of second arms 146 fixedly coupled to the lower bracket 148 also have an upper portion together with the second upper bracket 142 and the second lower bracket 148. Sliding movement toward the center of the beam 110 and the center beam 120 (from right to left in Fig. 2b). If one end of the slab (S) is detected by the distance sensor 170 mounted on the first lower bracket 138 during the movement of the first and second tongs, the controller 180 controls the first and the second after the set time. The driving of the driving motors 200 and 210 is stopped so that the pair of first arms 136 and the pair of second arms 146 are positioned at optimal positions for holding the slab S, respectively. As such, instead of stopping the first and second driving motors 200 and 210 depending on the sense of the overhead crane driver, the first and second driving motors 200 and 210 are controlled using the distance sensor 170 and the controller 180. ), The pair of first arms 136 and the pair of second arms 146 can always be placed in an optimal position for gripping the slab S. FIG. Thereafter, when the overhead crane driver lowers the upper beam 110 by a predetermined distance and then raises it again, the tong key which is locked in the tong key holder is released from the tong key holder and rises together with the upper beam 110, and the tong key is moved from the tong key holder. When separated, the pair of first arms 136 and the pair of second arms 146, which are opened in an open state, are respectively retracted and switched to a cross state, and both ends of the longitudinal direction of the slab S are respectively gripped.

In the above description, the present invention is limited to one embodiment, but various changes and modifications may be made by those skilled in the art without departing from the technical spirit of the present invention.

As described above, the variable slab barrel according to the present invention can safely hold the slab of various lengths (1,500 to 5,500 [mm]) currently produced at an optimum position, thereby enabling safe transport of the slab and providing a predetermined sensor. And the control unit automatically adjusts the arms to the optimal slab grip position, so that the overhead crane operator does not need to manually adjust the positions of the arms, which is convenient for the overhead crane operator and improves the work efficiency. It can be effective.

Figure 1a is a side view of a slab barrel according to the prior art,

1b is a front view of a slab barrel according to the prior art,

Figure 2a is a side view of a variable slab barrel according to an embodiment of the present invention,

Figure 2b is a front view of the variable slab barrel according to an embodiment of the present invention,

3a and 3b are a plan view and a front view showing a coupling state of the upper beam, the upper bracket and the upper screw bar,

4a and 4b are a plan view and a front view showing the coupling state of the lower beam, the lower bracket and the lower screw bar,

Figure 5a is a view showing a coupling state of the upper screw bar and the first drive motor,

Figure 5b is a view showing a coupling state of the lower screw bar and the second drive motor,

6 is a block diagram illustrating electrical connection of the first and second driving motors, the controller, and the distance sensor.

<Description of the symbols for the main parts of the drawings>

110: upper beam 112, 114: sliding groove

120: sensor beam 122, 124: sliding groove

132: first upper bracket 132-1: nut part

136: first arm 138: first lower bracket

142: second upper bracket 142-1: nut part

146: second arm 148: second lower bracket

150: upper screw bar 152, 154: screw portion

160: lower screw bar 162, 164: screw portion

170: distance sensor 180: control unit

Claims (2)

An upper beam which moves up and down and has sliding grooves formed at both ends thereof; A center beam positioned below the upper beam by a predetermined distance from the upper beam and having sliding grooves formed at both ends thereof; A pair of first upper brackets rotatably coupled to the first upper bracket and rotatably fastened to the first upper brackets, the first upper brackets being coupled to the upper beams so as to be slidably movable along the one end side sliding grooves of the upper beams and having nut portions at positions corresponding to the sliding grooves; And a pair of first arms of the first tension bar of which are rotatably fastened one by one to the pair of first tension bars and extend to the bottom in an intersecting state, and the lower end of which is bent toward the center of the center beam. A first tongs having a first lower bracket fixedly coupled to the first arm of the pair and coupled to the center beam so as to be slidably moved along one end side sliding groove of the center beam, and having a nut portion formed at a position corresponding to the sliding groove. Wow; A second upper bracket coupled to the upper beam to be slidably movable along the other end side sliding groove of the upper beam and having a nut part at a position corresponding to the sliding groove, and a pair rotatably fastened to the second upper bracket A second tension bar of the pair of second arms which are rotatably fastened one by one to the pair of second tension bars and extend downward to the bottom, and wherein a lower end is bent toward the center of the center beam; A second lower bracket fixedly coupled to the second arm of the pair and coupled to the center beam to be slidably movable along the sliding groove on the other end side of the center beam, and having a nut portion formed at a position corresponding to the sliding groove; Tonswa; An upper screw bar fixedly installed in an inner space of the upper beam, and having threaded portions having opposite angles to threads at both ends thereof, the screwed portions being fastened with nut portions of the first and second upper brackets, respectively; A lower screw bar fixedly installed in an inner space of the center beam, and having threaded portions having opposite angles to threads at both ends thereof, the screwed portions being fastened with the nut portions of the first and second lower brackets, respectively; A power supply unit for supplying power to the upper screw bar and the lower screw bar, respectively; A distance detecting sensor installed at the fastening portion of the first tension bar and the first arm or the fastening portion of the second tension bar and the second arm to sense one end of the slab; When one end of the slab is detected by the distance sensor while the upper screw bar and the lower screw bar are being powered, the power supply unit is controlled after a predetermined time to cut off the power supplied to the upper screw bar and the lower screw bar. Variable slab barrel comprising a control unit to make. The method of claim 1, The power supply unit supplies power to a first drive motor for supplying power to the upper screw bar, a first power transmission chain for transmitting power of the first drive motor to a rotating shaft of the upper screw bar, and the lower screw bar. And a second power transmission chain for transmitting the power of the second drive motor to the rotating shaft of the lower screw bar.