JPS6020289B2 - Lifting rake type steel material rotation conveyance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevating rake-type steel material turning and conveying device that rotates and transfers steel materials used in steel material cooling beds, heating furnaces, and the like.

A certain prior art technology includes a fixed rake having a V-shaped groove capable of drumming a steel material, an elevating rake installed in parallel with the fixed rake, and a drive means for vertically and horizontally moving the elevating rake to turn the steel material by 90 degrees. have.

When transporting steel materials, the steel materials placed in the V-shaped groove of the fixed rake are pushed up and supported all at once by the lifting rake, the lifting rake is moved horizontally to carry the steel material in the conveying direction, and then the lifting rake is lowered. and place it on another V-shaped groove of the fixed rake. In such prior art, all the steel materials are once elevated using a lifting rake. However, in recent years, for the purpose of increasing the size of steel products or improving production efficiency and yield, the weight of steel materials supplied to cooling beds or heating furnaces has become increasingly required.

If the weight of steel in the cooling bed or heating furnace increases,
The mechanical strength of not only fixed rakes but also lifting rakes must be improved. In addition, the driving power of the lifting rake must be increased. Therefore, equipment costs increase. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to improve the mechanical strength of a lifting rake and to provide a turning and conveying device for steel materials that can transport heavy steel materials while suppressing an increase in driving power as much as possible.

FIG. 1 is a side view of one embodiment of the present invention, and FIG. 2 is a simplified cross-sectional view taken along the line X--X.

Steel materials AI to A7 whose cross section is square (these steel materials A
I to A7 are collectively represented by A) are carried by an inlet roller table and transferred to a receiving transfer (not shown).
is loaded onto the present conveying device 2 applied to a cooling bed or a heating furnace. The conveyance device 2 conveys the steel material A in the conveyance direction 3, and the steel material A is cooled or heated in this process. The cooled or heated steel material A is delivered to the exit roller table 4 by a delivery transfer (not shown) as indicated by a blank 3a. In the conveyance device 2, the plurality of fixed rakes 5 extend in the conveyance direction 3 and are arranged at intervals in a direction perpendicular to the conveyance direction 3 (horizontal direction in FIG. 2).

Between the fixed rakes 5, a pair of lifting rakes 7a and 7b (the lifting rakes 7a and 7b are collectively represented by 7) extending parallel to the fixed rake 5 are arranged in parallel. Lifting rake 7a,
The elevating drive means 8 for elevating and lowering the device 7b is partially enlarged and shown in FIG. Referring also to FIGS. 1 and 2, a pair of swing balancers 9 and 10 are arranged at a distance in the transport direction 3. The lower ends of the swing balancers 9 and 10 are pivoted to fixed positions by pins 11 and 12. The axes of the pins 11 and 12 are perpendicular to the conveyance direction 3 (second
One ends of a pair of links 13 and 14 are pivotally supported by pins 15 and 16 at a distance in the transport direction 3 on the lifting rake 7a, which extends horizontally (in the left-right direction in the figure). Ikebata of links 13 and 14 are pins 17 and 1
8 is pivotally supported by swing balancers 9 and 10. The links 13 and 14 and the lifting rake 7a are connected to the swinging balancer 9 and the interlocking rod 2 by pins 25 and 26.
Together with 7, they form a parallelogram. 0 In exactly the same way, links 19, 2 are connected to the other lifting rake 7b and swing balancers 9, 10 by pins 21, 22; 23, 24.
0 is supported.

Lifting rake 7b and links 19, 201, pin 25
, 26 to form a parallelogram shape together with the interlocking rod 27. The pins 17 and 23 are located at left and right positions with respect to a plane including the parallax of the pins 11 and 25. Also pin 18
, 24 are located at left and right positions with respect to a plane including the axes of the pins 12 and 26. 0 At the rear ends of the lifting rakes 7a, 7b in the conveying direction 3, there are fixed pieces 28, 2 extending downward.
9 are fixed respectively.

The fixed pieces 28, 29 are connected to links 30, 31 of equal length via pins 55, 56. Link 30,3
The other ends of 1 are commonly pivoted to a fixed position by a pin 32. The pin 32 is located above the pins 55 and 56 and at the rear in the transport direction 3. Pins 15-18, 21-26
, 32, 55, 56, etc. have horizontal axes parallel to the pins 11, 12 and perpendicular to the conveying direction. 0 The interlocking rod 27 is reciprocated by a lifting hydraulic cylinder 34 via a lever 33 that is pivotally supported at a fixed position.

FIG. 4 is an enlarged side view of the fixed rake 5 and the lifting rake 7a.

The lifting rakes 7a, 7b are moved along the same locus as indicated by a broken line 36 by the lifting/lowering drive platform means 8. That is, the lifting rakes 7a and 7b are kept horizontal, and when one lifting rake 7a or 7b goes up, the other lifting rake 7b or 7a goes down, and when going up, in the conveying direction 0 direction 3, When descending, it moves up and down while moving in the opposite direction to the transport direction 3. In addition, the second neck slope 45 of the lifting rake 7a
(described later) begins to rotate steel material A,
The other lifting rake 7b is desirably located below the fixed rake 5 so as not to impede the rotation of the steel material A.
. In the fixed rake 5, V-shaped grooves 39 are arranged continuously in the conveying direction 3 at a pitch p, which are made up of a fixed inclined surface 37 facing upward in the conveying direction 3 and a fixed inclined surface 38 facing downward in the conveying direction 3. There is.

The V-shaped groove 39 has a substantially symmetrical shape with respect to a vertical plane passing through the valley bottom 40 thereof. The angle Q that the frictional surface 38 makes with the horizontal plane is larger than the friction angle of the steel material A, but does not exceed 45 degrees. Conveying direction 3 from the valley bottom 40
Q = 33 degrees, for example, in this embodiment. The friction angle of the steel material A is considered here because if the steel material dimensions are small as indicated by the broken line in Fig. This is because it is necessary to slide it on 38. The angle that the front face 37 makes with the horizontal plane is approximately equal to Q, and is, for example, =30 degrees. The included angle y of both inclined surfaces 37 and 38 is larger than 90 degrees (13
angle greater than 5-) degrees, and in this example Q=3
Since 3 degrees = 30 degrees, y = 117 degrees. The lifting rake 7a has turning protrusions 42 that are continuous in the conveying direction 3 at a pitch twice the pitch p.

A first inclined surface 43 facing upward in the conveying direction 3 of the turning protrusion 42
is set so that the angle it makes with the downward fixed surface 38 is 90 degrees, so it is a (90-Q) angle between the angles it makes with the horizontal plane, and in this example, Q = 33 degrees. So = 90 - 33 = 57 degrees. 1st slope 43
From the top 44 of the
5 in a row. The second inclined surface 45 is parallel to the downward fixed inclined surface 38. From the bending point 46, which is the lower end of the second slope 45, a third slope 47 extends downward in the transport direction 3 and has a steeper angle than the second slope 45. This third inclined surface 47 has an angle of 90 degrees with the upward fixed face surface 37.
Therefore, the angle 6 made with the horizontal plane is (90-) degrees, and in this example, the angle 6 is set to be 30 degrees.
degree, so 6=90-30=60 degrees. A support step portion 49 extending horizontally is formed from a bending point 48 that is the lower end of the third inclined surface 47 . A fourth stool slope 52 is formed from the front end portion 50 of the support step portion 49 in the conveyance direction 3, which is mirror-slanted downward in the conveyance direction 3 toward the valley bottom 51 of the turning protrusion 42. This fourth inclined surface 52 is parallel to the downward fixed inclined surface 38. Valley bottom 5 due to movement of lifting rake 7a
1 locus 36a and the locus 36 of the bending point 48 of the support step 49
The horizontal distance from b has a pitch p. The other lifting rake 7b is constructed in exactly the same manner.

Comparing the horizontal positions of the lifting rakes 7a and 7b at their upper limit positions, they are arranged offset by one pitch. Referring to FIG. 6, the turning and conveying operation of the steel material A will be explained.

First, the state when the lifting rake 7a is at the lower limit position below the fixed rake 5 is shown in FIG. At this time, the lifting hydraulic cylinder 34 is extended as shown in FIG. 1, and therefore the interlocking rod 27 is displaced to the left in FIG. Therefore, the lifting rake 7a is at the lower limit position, and the other lifting rake 7b is at the upper limit position. Steel material A has one outer surface k among its four outer surfaces k, ], m, n.
is in surface contact with the downward fixed surface 38, and the fixed rake 5
Qin has been fought on top. The lower edge of the steel material A is in contact with the valley bottom of the V-shaped groove 39. Next, as the lifting hydraulic cylinder 34 is contracted, the interlocking rod 27 is displaced to the right in FIG. Therefore, the lifting rake 7a goes up, and the other lifting rake 7b goes down. A state in which the second inclined surface 45 of the lifting rake 7a is in contact with the outer surface k' of the steel material is shown in FIG. 52. At this time, the supporting portion between the second inclined surface 45 and the outer surface k is located behind the center of the cross section of the steel material A in the conveying direction 3. That is, the bending line 46 is located further back in the conveyance direction 3 than in FIG. 0G. When the lifting rake 7a is further raised, the bending point 46 slides on the outer surface k of the steel material A and pushes it up.

Accordingly, the steel material A rotates in the transport direction 3 side about the lower edge of the steel material A that is in contact with the valley bottom 40 of the V-shaped groove 39 as the center of rotation. When the steel material A is rotated while being supported by the bending point 46 until G is located in front of the valley bottom 40 in the conveying direction 3, the steel material A is rotated until the outer surface n touches the upward fixed mirror slope 37. It rotates by itself. In this way, the steel material A rotates forward in the transport direction 3 by (y - 90) degrees around the lower ridge that rests on the valley bottom as the center of rotation. In this example, y
= 117 degrees, so it rotates by 27 degrees. A state in which the lifting rake 7a further rises and the valley bottom 40 and the bending point 48 coincide is shown in FIG.
The surface k' of steel material A is broadside. FIG. 5 shows a state in which the lifting rake 7a is further raised so that the support step portion 49 and the top portion 41 are at the same height position, and FIG. 5 shows a state in which the lifting rake 7a is further raised.

Diagram 〇G of steel material A with the maximum cross-sectional dimension that can be transported is higher than the top 41, and steel material A′ (5th
The centroid G' of the curve (indicated by a broken line in FIG.
By being positioned further forward in the conveying direction 3 than the steel members A and A', the steel members A and A' are rotated by (Q+) degrees forward in the conveying direction 3 from the posture shown in FIG. 5 due to the action of gravity. In this embodiment, since Q=33 degrees and Q=30 degrees, the rotation is made by 63 degrees.
Therefore, it can be seen that the horizontal dimension of the supporting step portion 49 must be less than half the side length of the longest dimension steel material A' to be transported. This turning state is shown in FIG. 5 and FIG. In this state, the outer surface m of the steel material A is supported by the first inclined surface 43, so that further rotation of the steel material A is prevented. The elevating rake 7a is raised to the upper limit position where its trough 51 coincides with the trough 40 of the fixed rake 5, as shown in FIG. 5. At this upper limit position, the outer surface n of the steel material A contacts the downward fixed inclined surface 8 of the fixed rake 5 and the fourth inclined surface 52 of the lifting rake 7a. As described above, the steel material A is (y-90) + (Q+) during the transition from the state shown in FIG.
) = 90 degrees, in this embodiment, it advances by a pitch p while turning 27 degrees 163 degrees = 90 degrees.

When the lifting rake 7a reaches the upper limit position, the lifting rake 7b is at the lower limit position, and then the lifting hydraulic cylinder 34 is extended. Therefore, the lifting rake 7a goes down, and the lifting rake 7b goes up instead. The lifting rake 7b repeats the operations shown in Figs.
Turn by 90 degrees. In this way, the steel material A is sequentially rotated by 90 degrees and transported. The locus of motion 36 (see FIG. 4) of the lifting rakes 7a and 7b that are driven up and down by the lifting drive means 8 is approximately 0 degrees to approximately 15 degrees in the conveying direction 3 side with respect to the vertical line at its upper limit position 54. angle a
The lengths of the links 30 and 31 and the vertical positions of the pins 32 may be selected so that the tangent lines are inclined by a certain amount.

According to the present invention, the angle 0' must be smaller than the angle that the fixed mirror slope 37 makes with the horizontal plane (OS
8). This is to allow the first mirror slope 43 to descend while separating the outer surface m of the steel material A without pressing it backward in the conveying direction 3 when the lifting rake 7a descends from the upper limit shown in FIG. 5. be. Now, lifting rake 7a
In the process of rising, the bending point 48 reaches the upper limit position 054 from the position where it coincides with the valley bottom 40', that is, from the state shown in FIG. 5 3 through the state shown in FIG.
During this state, the outer surface n of the steel material A slides on the apex 41 of the fixed rake 5a in a line contact state.

That distance is indicated by the reference s in FIG. By moving the steel material A by the distance s in the conveying direction 3, it is ensured that the figure 〇G of the steel material A reaches the front side of the vertex 41 in the conveying direction 3, so that the steel material A reaches the vertex 41.
It is ensured that the object rotates around the object due to its gravitational force. Therefore, even if the steel material A is relatively small in size, it can be conveyed by turning. In addition, as another embodiment of the present invention,
The lifting rakes 7a and 7b may be moved up and down by the lifting drive means 81 having another structure. For example, lifting rake 7
a, 7b, the trajectory 36 in the vertical direction is in the vertical direction,
8=0 and s=0. As described above, according to the present invention, when the steel material is turned, a part of the steel material is always partially supported by the fixed rake, so that the strength of the lifting rake is increased to a level that can sufficiently support the weight of the entire steel material. In addition, the power required to drive the lifting rake required to turn the steel material is relatively small, and therefore equipment costs and operating costs can be reduced.

[Brief explanation of the drawing]

Figure 1 is a side view of one embodiment of the present invention, and Figure 2 is a side view of one embodiment of the present invention.
A simplified cross-sectional view taken along the line X-X of the embodiment shown in the figure, FIG. 3 is an enlarged side view of the drive device 8, FIG. 4 is an enlarged side view of the fixed rake 5 and the lifting rake 7a, and FIG. 5 is an enlarged side view of the lifting rake 7a. rake 7
It is a side view for explaining the state where o steel material A is turned by the upward movement of a. A, AI to A7... Steel material, 1... Input side loaf bubble, 3... Conveyance direction, 4...
・・Outside loafner full, 5・・・Fixed rake,
7a, 7b... Lifting seeker, 8... Lifting drive means, 9, 10... Rocking balancer, 11
, 12, 15-18, 21-26, 32...Pin, 13
, 14, 19, 20... Link, 27... Connection rod, 28, 29... Fixed piece, 30, 31... Link, 3
3...Lever, 34...Hydraulic cylinder for lifting/lowering,
37...Upward fixed inclined surface, 38...
Downward fixed complicated slope, 39...V-shaped groove, 40...
... Valley bottom, 41 ... Top, 42 ...
・Turning protrusion, 43...First mirror slope, 44...
...Top, 45...Second slope, 47...
...Third slope, 49...Support step, 51...
...Valley bottom, 52...Fourth head slope, 55, 56...
…pin. Figure 1... Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A fixed inclined surface facing downward in the conveying direction having an angle of inclination greater than the friction angle of the steel material but not exceeding 45 degrees, and a fixed inclined surface facing upward in the conveying direction having an inclination angle approximately equal to the inclined surface. a fixed rake in which V-shaped grooves consisting of inclined surfaces are continuously formed at equal pitches in the conveying direction; a first inclined surface facing upward in the conveying direction and forming an angle of 90 degrees with the downward fixed inclined surface; a second inclined surface extending parallel to the downward fixed inclined surface from a top connected to the inclined surface; and a second inclined surface extending downward in the conveying direction at a 90 degree angle with the upward fixed inclined surface extending from the lower end of the second inclined surface. a third inclined surface, a supporting step extending horizontally from the lower end of the third inclined surface, and a fourth inclined surface parallel to the downward fixed inclined surface extending downward from the supporting step forward in the conveying direction to the bottom of the valley. and a pair of lifting rakes arranged in parallel to the fixed rake, each of which has a turning protrusion continuously formed in the conveyance direction at an interval twice the length of the V-shaped groove pitch of the fixed rake; The steel material is conveyed by each lifting rake, keeping each lifting rake horizontal so that when one goes up, the other goes down, and the steel is moved in the conveying direction when going up and in the opposite direction to the conveying direction when going down. An elevating rake type steel material turning and conveying device comprising an elevating drive means for rotating the steel material in 90 degree increments. 2. The elevating and lowering driving means includes: a pair of swing balancers which are arranged at intervals in the transport direction and whose lower ends are pivoted at a fixed position by pins having horizontal axes perpendicular to the transport direction; Each lifting rake and oscillating balancer are pin-coupled at both ends by pins having horizontal axes perpendicular to , forming a parallelogram with each lifting rake and the interlocking rod connected via the oscillating balancer. A pair of links exist for each lifting rake, and a pin having one end attached to the fixed piece of each lifting rake and the other end at a fixed position above the end and rearward in the conveying direction and having a horizontal axis perpendicular to the conveying direction. 2. The elevating rake-type steel material turning and conveying device according to claim 1, further comprising: pivotally supported links of equal length; and means for reciprocating the swinging balancer.