JPS6159825B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a walking bar type slab drawing device for continuous casting equipment.

PRIOR ART The present applicant has already provided various walking bar-type slab pulling devices as a means for pulling or transporting slabs discharged from a mold downward in continuous casting equipment.

This walking bar type slab pulling device is equipped with two groups of bars, an outer bar and an inner bar, above and below the slab to be pulled out, and these two groups of bars are driven alternately to transport the slab forward. In this structure, both the outer bar and the inner bar are designed to perform a movement of clamping the slab and a movement of carrying the clamped slab a fixed distance forward.

Problems to be Solved by the Invention However, in the above-mentioned conventional walking bar type slab drawing device, it is desired to further simplify the structure of the mechanism for performing these two movements. It has been desired to make the installation and removal even easier.

The present invention was made in view of the above-mentioned conventional circumstances,
The object of the present invention is to provide a walking bar-type cast strip drawing device having a new structure that simplifies the structure of the device, particularly the structure of the walking bar main body, and facilitates the installation and removal of the walking bar.

Means for Solving the Problems The walking bar type slab pulling device according to the present invention uses two groups of walking bars, an outer bar and an inner bar, which are arranged above and below a slab to be pulled. The structure is realized by the rotation of the eccentric shaft for the bar and the reciprocating motion in the direction of slab movement, which simplifies the structure of the main body of the walking bar and has a structure in which both the upper and lower walking bars are suspended from the eccentric shaft. The basic feature is that the walking bar, together with the eccentric shaft, can be easily attached to and removed from the frame.

That is, in a frame, an outer bar and an inner bar placed above the slab to be drawn are assembled to the backstays for the outer bar and the inner bar located above the outer bar and the inner bar, and the outer bar is placed below the slab. and an inner bar are assembled to the outer bar and inner bar backstays located below to form a walking bar main body, and an axis perpendicular to the moving direction of the slab is positioned above the upper backstay. A plurality of eccentric shafts having a plurality of eccentric shafts are arranged along the slab movement direction of the frame of the walking bar main body, and the upper backstays for the outer bar and the inner bar are rotated at the axial center portion of each eccentric shaft. The lower outer bar and inner bar backstays are rotatably supported on each end side of the central portion via tie rods, and both ends of each eccentric shaft are supported by bearing members. Each of the eccentric shafts is supported rotatably and detachably and movably in the slab drawing direction with respect to the frame, and the central axis and the axis on both sides of the eccentric shaft are respectively supported with respect to the axis of both ends of the eccentric shaft. are eccentric with a phase difference of 180 degrees from each other, and furthermore, a walking bar clamp drive device, which is provided outside the frame at one axial end of each eccentric shaft and swings and rotates each eccentric shaft, is detachable. while the frame is equipped with a pair of reciprocating drive levers that swing around a swing fulcrum,
One end of each drive lever is rotatably connected to both ends of each eccentric shaft, and the other end is provided outside the frame and extends along the direction of movement of the slab relative to the frame. Detachably connected to an eccentric shaft reciprocating drive device that reciprocates each eccentric shaft,
By driving the walking bar clamp drive device to swing and rotate each eccentric shaft within a certain angle range, the outer bar and the inner bar are alternately clamped and released from the slab, and the eccentric shaft Driven by a reciprocating drive device, each eccentric shaft is configured to move in the direction of movement of the slab when each bar is clamped to the slab with respect to the frame, and return to its original position when each bar is released from the slab.

Effects of the Invention In the above configuration, each eccentric shaft is oscillatedly rotated by the driving of the walking bar clamp drive device, and the upper and lower outer bars or inner bars are alternately moved toward and away from the slab, thereby clamping or holding the slab. At the same time, the reciprocating drive lever is driven by the reciprocating drive device to swing around the swing fulcrum, causing each eccentric shaft to reciprocate along the slab drawing direction, thereby pulling out the slab. In addition, during maintenance, etc., the above-mentioned walking bar clamp drive device and the eccentric shaft are disconnected, and the drive lever and the eccentric shaft are disconnected, and then the eccentric shaft is moved upward with respect to the frame together with the bearing member. By lifting the walking bar, the walking bar suspended and supported by the eccentric shaft can be removed from the frame.

Embodiments The present invention will be specifically described below based on illustrated embodiments.

Figures 1 and 2 show the entire plan and front view of the walking bar type slab drawing device.
This drawing device is shown as being of a horizontal drive type in which the horizontal portion of the slab, which is bent in the horizontal direction after being pulled downward from the mold of the continuous casting equipment, is held and transferred forward.

The basic structure of this extraction device is roughly composed of a walking bar main body 4, a walking bar clamp drive device, and an eccentric shaft reciprocating drive device.
The walking bar clamp drive device includes a drive device 1 for driving the walking bar main body 4 as a drive source, and a drive device 1 that transmits the power of the drive device 1 to the walking bar main body 4 to move each walking bar up and down. It consists of a clamp cam mechanism 2 for moving the clamp cam. Further, the eccentric shaft reciprocating drive device includes the drive device 1 and transmits the power of the drive device 1 to the walking bar main body portion 4 via the clamp mechanism 2, and moves each walking bar in the traveling direction of the slab B. and a propulsion cam mechanism 3 for moving the slab B forward.

First, the main body of the walking bar will be explained.

Figure 3 is a cross-sectional view taken along lines - and Figure 4 is a cross-sectional view taken along lines - and '-' in Figure 3. -' line cross section is shown. As clearly shown in FIG. 4, the walking bar main body 4 has walking bars 6, 6, . . .; 7, 7, . . . located above and below the slab B passing through. The walking bar is composed of two groups of bars, as shown by two numerals 6 and 7 in the figure. The walking bars 6 and 7 of each group are arranged alternately, and the walking bar designated by numeral 6 is referred to as an outer bar, and the walking bar designated by 7 is referred to as an inner bar. A group of outer bars 6 and a group of inner bars 7 each operate integrally in the upper and lower portions. The walking bars 6, 7 of each group are configured to move toward and away from the slab B in the vertical direction and to reciprocate along the direction in which the slab B travels. Then, the upper group of outer bars 6 and the lower group of outer bars 6 form a set, and the upper group of inner bars 7 and the lower group of inner bars 7 form a set, and each set consists of a cast slab. It is designed to hold and transport B. Each of the walking bars 6, 7 is provided with a cooling plate 8 on the surface facing the slab B, and is brought into contact with the slab B via the cooling plate 8.

FIG. 5 is a sectional view taken along the line -- in FIG. 4. Fifth
4, the upper group of outer bars 6 is supported by backstays 9 and 10, the upper group of inner bars 7 is supported by backstays 11 and 12, and the lower group The outer bar 6 is assembled integrally with backstays 13 and 14, and the lower group of inner bars 7 are assembled integrally with backstays 15 and 16, respectively.

As best shown in Figures 3, 4 and 5, frame 8
Rails 90 are disposed above both ends of the slab B, and guide rollers 21 are supported on the rails 90 as bearing members so as to be movable along the moving direction of the slab B. axis 1
7 to 20 are rotatably supported. The backstays 9-12 are rotatably suspended on these eccentric shafts 17-20. The central axis O of the central part of the eccentric shafts 17 to 20 and the center of the tie rods 22 to 25
O″ is the axial center (reference center) of each guide roller 21
It is eccentric on both sides with respect to O′. Therefore,
When each of the eccentric shafts 17 to 20 rotates about the axis O', each backstay 9 to 12 can move toward and away from the slab B together with the outer bar 6 and the inner bar 7 in a vertical motion.

Further, the upper ends of tie rods 22 to 25, one pair each, are rotatably suspended on the eccentric shafts 17 to 20, and the lower ends thereof are connected to the lower backstays 13 to 25, respectively.
It is rotatably connected to trunnions 80 protruding from both ends of 16. In other words, the lower backstay 1
3 to 16 are suspended by respective tie rods 22 to 25 together with a lower walking bar. As shown in FIG. 6, the eccentric shaft 18 for driving the outer bar 6 is connected on both sides to the trunnion 80 protruding from the backstay 13 for restraining the outer bar 6 below, by a lever 26. The eccentric shaft 20 for driving the inner lever 7 is connected by a lever 27 on both sides to the trunnion 80 which protrudes from the backstay 15 in order to restrain the lower inner bar 7. The outer bar or the upper and lower inner bars are interlocked with each other.

In the above configuration, each eccentric shaft 17 to 20 is
The outer bar 6 and the inner bar 7 are rotated forward or backward at a constant angle θ, and by this rotation, the outer bar 6 and the inner bar 7 are alternately rotated into the slab B.
It operates to clamp and release.

On the other hand, the walking bar body 4 includes a reciprocal motion transmission mechanism for propelling the outer bar 6 and the inner bar 7 in the advancing direction of the slab B when these bars clamp the slab B. . That is, the third
4, as shown in Fig. 4, the drive cam 1 is rotated within a certain angle range by a propulsion cam mechanism 3, which will be described in detail later.
A pair of input shafts 29 is provided on one side of the frame 84, and the input shaft 29 is provided on the outer periphery of each input shaft 29.
A two-pronged lever 30 that rotates integrally with the lever is provided. Then, each lever 3 on one side of the two-pronged lever 30
0a is connected via a lever 30c to the lower end of each reciprocating drive lever 36 mounted on one side of the foot 84 with a pin 37 so as to be swingable around the pin 37. The upper end of each lever 36 is rotatably connected to the eccentric shaft 20 or 17 via a lever 85. On the other hand, each of the other levers 30b of the two-pronged levers 30 is connected to the upper end of each lever 31, and the lower end of each lever 31 is connected to each transmission shaft 32 rotatably mounted between both ends of the frame 84. The other end of each transmission shaft 32 is connected to the lower end of each lever 33 via each lever 81, and the upper end of each lever 33 is attached to a frame 84. The other lever 34c of each two-pronged lever 34 is rotatably connected to one lever 34b of each two-pronged lever 34, which is rotatably provided on the outer periphery of each shaft 86. It is rotatably connected to the lower end of the dynamic drive lever 35, and the upper end of each lever 35 is rotatably connected to the other end of the eccentric shaft 20 or 17 via each lever 85.
In this structure, when each input shaft 29 is oscillated and rotated within a certain angle range, the pair of reciprocating drive levers 36 and 35 on both sides oscillate about each pin 37 as a fulcrum, and the lever 36 , 35 causes the eccentric shaft 20 or 17 to move toward each guide roller 2.
1 moves along the traveling direction of the slab B on the rail 90. When the eccentric shaft 20 moves, the inner bar 7
Furthermore, when the eccentric shaft 17 moves, the outer bars 6 move together. This movement is combined such that the outer bar 6 or the inner bar 7 moves in the advancing direction of the slab B when it is clamped, and returns to its origin when the slab B is released.

Note that the reciprocating motion transmission mechanism includes, for example, levers 36 and 8.
By removing the pin 38 that pivotally connects the
It can be easily removed from each eccentric shaft, and by removing the connection between each eccentric shaft and the clamp shaft, the eccentric shaft 1
If you lift 7-20, walking bar 6,
7 can be easily removed from the frame 84 together with tie rods 22-25, levers 26, 27, and back stays 9-16.

Next, the drive system for driving the eccentric shafts 17 to 20 and the pair of input shafts 29 of the upper walking bar main body 4, that is, the drive device 1, the clamp cam mechanism 2, and the propulsion cam mechanism 3 will be described.

FIG. 7 shows the propulsion cam mechanism 3, and FIG. 8 shows the clamp cam mechanism 2.

The camshaft 40 of the propulsion cam mechanism 3, the camshaft 39 of the clamp cam mechanism 2, and the drive rotation shaft 87 of the drive device 1
are arranged in a straight line, and the coupling rings 82,
83.

First, the clamp cam mechanism 2 will be explained based on FIG.

An outer bar cam 41 that is involved in driving the outer bar 6, an inner bar cam 42 that is involved in driving the inner bar 7, and a balance cam 43 are attached to the camshaft 39. On the other hand, four clamp shafts 47, 48, 55, horizontally and parallelly arranged above the cam shaft 39,
56, and each of these clamp shafts 47,
48, 55, and 56 are adapted to rotate within a certain angle range by the rotation of the camshaft 39. When the camshaft 39 rotates, the rotation of the outer bar cam 41 and the inner bar cam 42 attached thereto is controlled via levers 45 and rods 46 that rotatably fix the lower part of each cam follower 44. Clamp shaft 47 and inner bar clamp shaft 4
8, and the outer bar clamp shaft 47 and the inner bar clamp shaft 48 each rotate by a certain angle. Each hydraulic cylinder 50 is attached to one end of each of the clamp shafts 47 and 48 via a lever 49. By continuously pressing the cylinder rod with a constant pressure, each hydraulic cylinder 50 moves each cam follower 44 to each cam 41, 4.
I try to keep pressing 2.

The rotation of the outer bar clamp shaft 47 is transmitted to another clamp shaft 55 via the lever 51 and the rod 53, and the clamp shaft 55 rotates in the same manner as the clamp shaft 47. Further, the rotation of the inner bar clamp shaft 48 is similarly transmitted to another clamp shaft 56 via the lever 52 and the rod 54, and the clamp shaft 56 performs the same rotation as the clamp shaft 48.

Each of the above clamp shafts 47, 48, 55, 56 is
It is connected to each eccentric shaft 17, 20, 18, 19 via a universal spindle 57, respectively. In other words, each eccentric shaft 17, 20, 18, 19, together with each clamp shaft 47, 48, 55, 56, is driven in the vertical direction by the rotational force of the camshaft 39 and the pressing force of the hydraulic cylinder 50. .

The balance cam 43 is used to minimize the fluctuating drive torque by offsetting the main clamp drive torque and the propulsion cam torque, which will be described later. The torque of the camshaft 39 is controlled.

Next, the propulsion cam mechanism 3 will be explained based on FIG.

An outer bar cam 61 and an inner bar cam 62 are fixed to the camshaft 40. Also, the camshaft 4
An outer bar propulsion shaft 66 and an inner bar propulsion shaft 67 are provided below and in parallel with this. These propulsion shafts 66 and 67 are connected to each input shaft 29 of the walking bar main body 4 via a coupling 58.

The above-mentioned outer bar cam 61 and inner bar cam 62
The outer bar propulsion shaft 66 and the inner bar propulsion shaft 67 are connected to the outer bar propulsion shaft 66 and the inner bar propulsion shaft 67 via levers 64 and rods 65, respectively, which rotatably fix the lower part of each cam follower 63.
, and each propulsion shaft 66, 67 rotates within a certain angular range.

A hydraulic ram cylinder 68 is attached to one end of each propulsion shaft 66, 67 via a lever 69. Each hydraulic ram cylinder 68 always presses one end of each propulsion shaft 66, 67, and presses each cam follower 63 against each cam 61, 62. With this configuration, each of the propulsion shafts 66 and 67 reciprocates within a certain angle range each time the camshaft 40 rotates once, so that the input shaft 29 and the The outer bar 6 and the inner bar 7 reciprocate along the moving direction of the slab B via a reciprocating motion transmission mechanism or the like.

The rotational speed of the camshaft 40 is set to be faster than the billet feed speed of the roll type billet pulling device installed in the front position of the present walking bar type billet pulling device.
Alternatively, if they are made the same, a pulling force can be applied to the slab, and on the other hand, if the rotation speed of the camshaft 40 is slowed down, the pulling force can be applied to the slab. Compressive force can be applied to slabs. This compression force is determined by the pressure of the hydraulic ram cylinder 68.

According to the above embodiment, the walking bars 6 and 7 for the outer bar and the inner bar are suspended and supported by the eccentric shafts 17 to 20, and each bar 6 and 7 is moved up and down by rotating the eccentric shafts 17 to 20. Hold slab B with
A walking bar clamp drive device (clamp cam mechanism 2 and drive device 1) that releases the walking bar and a reciprocating drive device (propulsion cam mechanism 3 and drive device 1) that reciprocates the eccentric shafts 17 to 20 along the slab drawing direction, respectively. By arranging it outside the frame 84, there is no driving device for the walking bars 6, 7 within the frame 84 of the walking bar main body 4, and the structure of the walking bar main body 4 becomes simple. Therefore, since the driving devices are not present below the walking bars 6, 7 in the frame 84, there is no need to protect each driving device from the sludge that separates from the slab, and no protection device is required. Also, with respect to the axis O of the eccentric shafts 17 to 20 supported by the guide roller 21, the axis O of the supporting portion of the eccentric shafts 17 to 20 of the upper and lower bars 6, 7,
By eccentrically rotating the eccentric shafts 17 to 20, the upper and lower outer bars 6 and inner bars 7 move toward and away from each other, thereby clamping and releasing the slab B.
Since the eccentric shafts 17 to 20 are reciprocated relative to the frame 84 to transfer the slab B,
For each walking bar 6, 7, the operation of clamping and releasing the slab B, the transfer of the slab, and the operation of returning to the origin position can be performed by the same eccentric shafts 17 to 20, and the drive system of the walking bars 6, 7 The structure becomes simpler. In addition, during maintenance etc., the walking bar 6,
7, since the walking bars 6, 7 are suspended and supported only on each eccentric shaft 17-20, and each eccentric shaft 17-20 is arranged removably from the frame 84 and the drive device, the eccentric shaft 17
The back stays 9 to 16 and the walking bars 6 and 7 can be easily removed together with the backstays 9 to 20, and the work of removing the walking bars 6 and 7 can be easily performed.

Effects of the Invention According to the configuration of the invention described above, the walking bars for the outer bar and the inner bar are suspended and supported by the eccentric shaft, and the slabs are clamped and released by rotating the eccentric shaft to move each bar up and down. By arranging the walking bar clamp drive device and the reciprocating drive device for reciprocating the eccentric shaft along the slab drawing direction outside the frame, the walking bar drive device does not exist within the frame of the walking bar main body. First, the structure of the walking bar main body is simple. In particular, compared to the device shown in Japanese Patent Application No. 47-136931 (Japanese Unexamined Patent Publication No. 49-83622) filed by the present applicant, the present invention does not have a propulsion cam mechanism below the walking bar. It is clear that the structure of the bar body is simplified. Therefore, since the driving device does not exist below the walking bar in the frame, there is no need to protect each driving device from the sludge peeling off from the slab, and no protection device is required.

In addition, by making the axes of the support portions of the eccentric shafts of the upper and lower bars eccentric with respect to the axial center of the eccentric shaft supported by the bearing member, the upper and lower outer bars and inner bars move toward and away from each other by rotation of the eccentric shafts. Since the eccentric shaft is moved in the direction to clamp and release the slab, and the eccentric shaft is reciprocated with respect to the frame to transfer the slab, it is possible to clamp and release the slab with respect to each walking bar.
The release operation, the transfer of the slab, and the return operation to the original position can be performed by the same eccentric shaft, and the structure of the walking bar drive system becomes simpler.

In addition, when removing the walking bar from the frame during maintenance, etc., the walking bar is suspended and supported on each eccentric shaft, and each eccentric shaft is arranged to be detachable from the frame and each drive device, so the back stay can be removed along with the eccentric shaft. The walking bar can be easily removed and the walking bar can be easily removed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, FIGS. 1 and 2 are an overall plan view and an overall front view of a walking bar type slab drawing device, and FIG.
Figure 4 is a cross-sectional view taken along lines - and '-' in Figure 3, the left half of the center line is a cross-sectional view taken along lines '-', and the right half is a cross-sectional view taken '-'; 6 is a sectional view taken along the line ``--'' in FIG. 4, FIG. 7 is a sectional view showing the propulsion cam mechanism, and FIG. 8 is a sectional view showing the clamp cam mechanism. 1... Drive device, 2... Clamp cam mechanism, 3
...Propulsion cam mechanism, 4... Walking bar main body, 6, 7... Walking bar, 8... Cooling plate, 9-16... Back stay, 17-20...
Eccentric shaft, 21...Guide roller, 22-25...
Tie rod, 26, 27...Lever, 29...Input shaft, 30...Two-pronged lever, 30a, 30b, 3
0c...Lever, 31...Lever, 32...Transmission shaft, 33...Lever, 34...Two-pronged lever, 34
a, 34b... Lever, 35, 36... Reciprocating drive lever, 37... Pin, 39, 40... Camshaft, 41, 42... Cam, 43... Balance cam, 44... Cam follower, 45... …lever,
46... Lever, 47... Clamp shaft for outer bar,
48... Clamp shaft for inner bar, 49... Lever,
50...Hydraulic cylinder, 51...Lever, 53...
... Rod, 55, 56 ... Clamp shaft, 57 ...
Universal spindle, 58...Cup ring, 59...Hydraulic ram cylinder, 60...Cam follower, 61...Cam for outer bar, 62...Cam for inner bar, 80...Trunion, 81...Lever, 82, 83... ... Coupling, 84 ... Frame, 85 ... Lever, 86 ... Shaft, 87 ... Drive shaft, 90 ... Rail, O ... Axis center of eccentric shaft,
O'...Axle center of guide roller, B...Slab.

Claims (1)

[Scope of Claims] 1. Within the frame 84, the outer bar 6 and the inner bar 7 are arranged above the slab B to be drawn, and the backstays 9 to 16 for the outer bar and the inner bar are arranged above the outer bar 6 and the inner bar 7, respectively. The outer bar 6 and the inner bar 7 arranged below the slab B are assembled to the respective backstays 9 to 16 for the outer bar and the inner bar located below to form the walking bar main body 4. , A plurality of eccentric shafts 17 to 20 having axes orthogonal to the moving direction of the slab B are attached above the upper backstays 9 to 16 to the frame 84 of the walking bar main body 4 along the moving direction of the slab. The upper outer bar back stay 9 and inner bar back stay 9 are arranged at the axial center portions of the eccentric shafts 17 to 20.
- 12 are rotatably suspended and supported, and the lower outer bar and inner bar backstays 13 -
16 are rotatably suspended and supported, and both ends of each of the eccentric shafts 17 to 20 are rotatably supported by bearing members 21, and movably and detachably attached to the frame 84 in the slab drawing direction. In addition, the axial centers of both ends of each of the eccentric shafts 17 to 20
With respect to O′, the axis O of the central part and the axes on both sides
O'' are eccentric with a phase difference of 180 degrees from each other, and each eccentric shaft 17 is provided outside the frame 84 at one axial end of each eccentric shaft 17 to 20.
The walking bar clamp drive devices 1 and 2 for swinging and rotating the 20 are removably connected, and the frame 84 is provided with a pair of reciprocating drive levers 35 and 36 that swing around a swing fulcrum 37,
One end of each drive lever 35, 36 is connected to each eccentric shaft 17.
The eccentric shafts 17 to 20 are rotatably connected to both ends of each of the eccentric shafts 17 to 20, and the other end is provided outside the frame 84, and the eccentric shafts 17 to 2 extend along the moving direction of the slab B relative to the frame 84.
The walking bar clamp drive device 1, 2 is removably connected to the eccentric shaft reciprocating drive device 1, 3 that reciprocates the walking bar clamp drive device 1, 2.
By driving the eccentric shafts 17 to 20 to swing and rotate them within a certain angle range, the outer bar 6 and the inner bar 7 are alternately clamped and released from the slab B, and the eccentric shafts Each reciprocating drive lever 35, 3 is driven by the reciprocating drive device 1, 3.
6 swings, and each of the eccentric shafts 17 to 20 moves in the direction of slab movement when each bar 7, 6 is clamped to the slab with respect to the frame 84, and returns to the original position when each bar 7, 6 is released from the slab. A walking bar type slab pulling device characterized by being designed to return to its original position.