JPS6129809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a plate holding device for a rolling mill.

In cold rolling of steel plates, etc., it is sometimes necessary to apply appropriate tension to the steel plates in order to prevent the steel plates from being squeezed by work rolls. For example, immediately after a steel plate is bitten by a work roll, in a tandem mill, the steel plate comes out of the work roll of the front stand and then passes through the rear stand, or in particular, when the coil delivery device on the entry side of the rolling machine In a type of rolling mill where no tension is applied between the steel plate and the rolling mill, the steel plate must be tensioned throughout the rolling operation. In such a case,
For example, as shown in FIGS. 1 and 2 of the reference drawings, a plate holding device 2 is used on the inlet side of the work roll 1 (Japanese Patent Publication No. 7910/1983).

In this device, the movable frame 3 and the fixed frame 4 are movable up and down, and the presser plate 9 of the wiper block 8 is attached to the insertion side of the fixed frame 4 via the link mechanisms 5 and 6, and the presser plate 9 and the movable The frames 3 are connected by strings 10, and the arms 7 of the link mechanisms 5 and 6 and the fixed frame 4 are connected by springs 1.
1, and the link mechanism is also provided with a tilting mechanism for tilting the arm 7 of the link mechanism outward. However, the presser plate 9 is quite large, and its weight is generally 100
~150Kg. Therefore, the string mechanisms 10, 13, 14 and the spring mechanism 11 for hoisting it become quite large equipment, making an already narrow space even more narrow. Furthermore, the wooden wiper block 8 needs to be frequently removed from the plate holding device and installed during rolling for inspection and replacement due to wear and tear or penetration by iron pieces. However, with the wiper block 8 pressed down, it is almost impossible to tilt the presser plate 9 outward using the operating lever of the tilting mechanism against the large pressing force due to limited space. . Therefore, there may be a method of moving the upper movable frame 3 upward to lift the presser plate 9 and perform the work while reducing the presser force. Because it is located far away from the front of the plate holding device inside the machine, it is difficult for one person to do it alone, and even if it could be done, it would take a long time, and even a little rolling stoppage time is valuable, and the number of personnel was reduced to the ultimate. Not suitable for rolling work.

The present invention solves the drawbacks of the conventional mechanism as described above, and eliminates the wiper block replacement step by connecting a fluid piston cylinder mechanism to a retaining plate without using strings or springs. The purpose of the present invention is to provide a device that can reduce the amount by half and allow even one person to easily perform replacement work in a short time.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 to 5, plate holding device A
An upper movable frame 15 and a lower fixed frame 16, which are movable up and down, are arranged facing each other, and a wiper block mounting base 1 is provided on the opposite side of each frame.
7 and 18 are provided, and wiper blocks 19 and 20 are mounted on the lower and upper surfaces of the mounting bases 17 and 18, respectively.

The rolling material charging side (first side) of the fixed frame 16
At the bottom (on the right side of the figure), a first link 21, which is an L-shaped support link, is pivotally supported at one left end by a pin 22, and is attached to be swingable in a vertical plane. And, on the other upward right end of this first link 21,
Second link 25 and third link 26 that are vertically parallel
are each attached at one end via pins 23 and 24 so as to be swingable in a vertical plane. These second and third
The other end of the link is connected to pins 27 and 28 at the middle and base end of the reinforcing frame 30 of the holding plate 29.
The second and third links 25 and 26, the other upwardly facing piece of the first link 21, and the reinforcing frame 30 constitute a parallelogram link.

The upper part of the presser plate 29 and the fixed frame 16
A lower fluid piston cylinder mechanism 42 is pin-coupled between. That is, the lower piston cylinder mechanism 42 has a bracket 40 that is provided at the upper part of the central portion of the presser plate 29 in a direction perpendicular to the rolling material charging direction (back and forth direction) (left and right direction) and protrudes downward from its tip.
and are pivotally connected to each other by a bracket 41 that projects from the side surface of the fixed frame 16 into which the rolled material is charged.

A notch 31 is provided in a vertically intermediate portion of the holding plate reinforcing frame 30 that faces the fixed frame 16, and one side head of the second link 25 pivot pin 23 is inserted into the notch 31. This forms a stopper that limits vertical displacement of the pressing plate 29 relative to the first link 21.

Further, a downward upper limit stopper 32 that faces the first link 21 is protruded above the first link pivot portion on the rolling material charging side surface of the fixed frame 16 . Further, a pair of left and right arms 33, 33' are provided horizontally projecting below the first link pivot portion, and a rotation shaft 38 is pivotably supported between these arms. Furthermore, a pair of stopper arms 37, 37' are fixed closer to the center of the apparatus than the pair of arms 33, 33'. A rotating arm 36 is attached to one left end of the rotating shaft 38 so as to face in the same direction as the stoppers 37, 37'. A handle 34 parallel to the rotation shaft 38 is attached to the other end of the rotation arm 36, and a pin 35 is formed at the other end so that the pin 35 can be moved in and out of a hole 39 provided in the arm 33. Therefore, the stopper arms 37, 37' do not rotate when the pin 35 is engaged with the hole 39, and support the first link 21 and serve as a lower limit stopper. When the rotary arm 36 is separated from the handlebar and the rotating arm 36 is directed downward by operating the handle, the lower limit is released.

The aforementioned first, second and third links 21, 25, 2
6 are provided at a constant distance in the left-right direction of the fixed frame 16 (left-right direction in FIG. 4).

In addition, 43 in FIG. 1 is a rolled plate material, B,
C is an upper work roll and a lower work roll, respectively.

Next, the operating state of the plate holding device of the present invention will be explained.

During the rolling operation, as shown in FIGS. 1 and 2, in the lower fixed frame 16, the first link 21 is connected to the upper limit stopper 32 and the lower limit stopper arms 37, 37'.
The vertical movement is restricted by this, and the contraction of the lower piston cylinder mechanism 42 causes the upper tip of the presser plate 29 to strongly press the inclined portion of the rear end of the wiper block 20 on the material input side.

When the plate material 43 is supplied and its leading edge approaches the plate entry side of the plate holding device, the upper movable frame 15 moves upward by the operation of the upper cylinder 46 according to a preset timing command, and accordingly, the wiper block mounting base 17, The upper wiper block 19 opens and at the same time the lower piston cylinder mechanism 42 operates to open the holding plate 29. The presser plate 29 moves upward as the lower piston cylinder mechanism 42 extends, but the lower surface of the notch 31 of the reinforcing frame 30 of the presser plate 29 is restricted by the pin 23.
As shown in FIG. 6, the first link 21 does not move, and only the presser plate 29 moves, and the presser plate slightly separates from the wiper block. At this point, the upper end of the presser plate 29 is at a slightly higher position than the upper surface of the lower wiper block 20, and the leading end of the plate 43 can be smoothly passed through without hitting the rear end of the lower wiper block 20. Taking this into consideration, the shape and dimensions of the cutout 31 of the reinforcing plate 30 (especially the lower surface of the cutout) are determined.

Subsequently, after the leading edge of the plate material 43 is transferred onto the lower wiper block 20 and until it is bitten by the work rolls B and C, the lower piston cylinder mechanism is contracted in accordance with the set timing command, The presser plate 29 presses the lower wiper block 20, and at the same time, its upper surface becomes lower than the upper surface of the wiper block 20, and the plate material 43 is pressed against the work rolls B and C.
It is designed to fit into the Therefore,
When the plate material 43 is bitten by the work roll and tension is generated, it is possible to prevent the plate material 43 and the pressing plate 29 from rubbing against each other. When the presser plate 29 strongly presses the lower wiper block 20, the pin 23 presses the notch 3.
The shape of the cutout 31 is determined to such an extent that it does not come into contact with the top surface of the cutout 1 .

At the same time that the leading end of the plate material 43 is bitten by the work rolls B and C, or in response to other necessary timing commands, the upper movable frame 15 is lowered by the operation of the upper cylinder 46, moves in the closing direction, and moves up and down. The wiper blocks 19 and 20 strongly press down on the plate 43.

Next, the procedure for replacing the wiper blocks 19 and 20 will be explained.

To operate the upper movable frame 15, the upper cylinder 46 is operated to open, and at the same time the lower piston cylinder mechanism 42 is operated in the extension direction (as shown in the sixth figure). The upper wiper block 19 can be easily replaced according to known methods. According to the structure of the present invention, the lower wiper block is constructed by first pulling out the handle 34 of the rotating arm 36 from the hole 39 of the fixed arm 33 against the elastic force, cutting the edge between the rotating arm 36 and the fixed arm 33, and then rotating the wiper block. Move the moving arm 36 to the handle 3
4 to rotate it downward together with the shaft 38. Then, the stopper arms 37, 37' release the contact with the lower surfaces of the first links 21, 21' and separate, and the restriction on the downward movement of the first links 21, 21' is released. At this time, the lower piston cylinder mechanism 4
2 operates in the extension direction to lift up the presser plate 29 (the state shown in FIG. 6), and also supports the pin 23 on the lower surface of the notch 31, so that the rotation of the rotation arm 36 does not require much force. After the rotating arm 36 is rotated downward in this manner, when the lower piston cylinder mechanism 42 is contracted, the presser plate 29 is moved as shown in FIG.
performs a circular motion around the pin 22, and moves until the lower surface of the first link 21 comes into contact with the end of the rotating arm 36 on the side opposite to the handle, and the presser plate 29 is retracted to a position lower than the position of the lower wiper block 20. , there is no problem in replacing the lower wiper block 20 at all.

Restoration after replacement can be carried out by performing the reverse operation to the above.

Since the present invention has the above-described configuration, wiper block replacement can be carried out in an extremely short period of time without any trouble, and the work can not only be carried out safely, but also
It also helps save labor, and the lower wiper block has a stronger grip.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is an enlarged view of the main part of Fig. 1, and Fig. 3 is an enlarged view of the main part of Fig. 2.
4 is a front view of FIG. 1, FIG. 5 is a perspective view of FIG. 1, and FIGS. 6 and 7 are side views of essential parts showing operating states. A... plate holding device, B, C... work roll,
15...Movable frame, 16...Fixed frame,
19, 20... Wiper block, 21... First link, 25... Second link, 26... Third link, 29... Holding plate, 30... Reinforcement frame, 3
DESCRIPTION OF SYMBOLS 1... Notch, 32... Upper limit stopper, 33... Arm, 36... Rotating arm, 37, 37'... Stopper arm, 38... Shaft, 42... Lower piston cylinder mechanism, 43... Plate material.

Claims (1)

[Scope of Claims] 1. A plate holding device for a rolling mill in which a movable frame 15 and a fixed frame 16 that can move vertically are arranged vertically opposite each other, and wiper blocks 19 and 20 are attached to each of these frames 15 and 16. , a support link 2 is provided on the rolling material charging side of the fixed frame 16.
1 is attached to be able to swing in a vertical plane, and a holding plate 29 is provided at the tip of this supporting link 21 so as to be movable in a vertical plane by a substantially parallelogram link mechanism. Driven by a fluid piston cylinder mechanism 42, the fixed frame 1
6 is provided with an upper limit stopper 32 and lower limit stoppers 37, 37' of the support link 21, and the lower limit stoppers 37, 37' are capable of engaging and disengaging from the support link 21. Machine plate holding device. 2. A presser plate reinforcing frame 30 is fixed to the presser plate 29, and the presser plate reinforcing frame 30 is provided with a stopper 23 for limiting vertical displacement of the presser plate 29 relative to the support link 21. A plate holding device for a rolling mill according to claim 1, characterized in that: