JPH026018A - Bar material constraining device - Google Patents

Abstract

PURPOSE:To prevent the end-swinging of a bar material by supporting a pair of wall plates on a carrying line in a state where the plates are arranged to an (inverted) truncated chevron and can be opened and closed by means of a hydraulic cylinder and adjusting the interval between both plates in the closed state in accordance with the thickness of the bar material. CONSTITUTION:A bar material 3 is carried by rotating carrying rollers 1 which are provided at regular intervals and driven by motors 2 and inserted into a roll straightening machine 4. Bearings are provided on the bottom side of the bar-material carrying line and wall plates 7a and 7b are provided on both sides of the line. Then front end sections of arms 8a extended downward on the rear sides of the wall plates are supported by the bearings. The wall plates are supported in a state where the plates can be opened and closed and hydraulic cylinders 11a which open and close the wall plates are provided. The penthouses projecting inward are installed to the upper end of each wall plate and click pieces 16a which protrude upward from carrying surface of the carrying rollers when the wall plates are closed are provided to the lower section of each wall plate. Therefore, the interval between both wall plates can be adjusted in accordance with the thickness of the bar material and the end- swinging of the bar material can be prevented certainly.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to eliminate unnecessary distortions at the trailing end due to the rotation of the bar when straightening the strain that occurs during rolling of the bar using a straightening machine in the subsequent process. The present invention relates to a bar restraining device that restrains rotation to prevent noise during straightening, protection of conveyance rollers, and occurrence of flaws.

[Prior art] Bars that have been passed through a rolling mill and processed to the required thickness are subject to distortion due to plastic deformation, so they often have to be straightened into straight bars using a straightening machine in the subsequent process. . When the tip of a long bar is gripped by the rolls of a straightening machine, circumferential rotation is applied to the bar, causing the tail end of the bar to swing significantly (so-called oscillation phenomenon). For this reason, there is a defect that the trailing end hits the conveyance roller, causing noise or damaging the conveyance surface.

In order to eliminate such defects, the present inventors have previously filed a patent application (Japanese Patent Laid-Open No. 127123/1983) for a bar restraining device to restrain the trailing end of the bar and suppress unnecessary turning.

As shown in FIG. 6, this bar restraining device has a pair of opposing walls Q and Q' sandwiching a conveying roller b disposed on a conveying line a, and a restraining claw d at the bottom of each wall C9C'. ,d
' are alternately extended to face each other, and the bar e is restrained between the inner surfaces of both restraining claws d and d'. Then, in order to move the walls c, c and both restraining claws d, d' back and forth, a pair of cylinders f, f' are attached to the respective walls Q, Q' with a reinforcing frame gag' and a support plate, -h. ' and so on. In addition, mounting stands (tables) i and i' are installed below the cylinders f and f', respectively, so as to be horizontally slidable, and on the bottom surfaces of both mounting stands i and i' are heads J+J with internal threads cut into them. Insert ' into the threaded shaft with reverse threads on both sides of both heads j and j', and rotate the shaft freely with bearings m and m' arranged on base 1. A rotary drive device n is provided on the screw shaft so that the mounting bases i and i' can move back and forth in a direction perpendicular to the conveyance line a under the rotational action of the screw.

0 is the motor. When restraining a rod e with a large diameter, the mounting bases i, i' are attached to the screw shaft by rotation of ''.
are moved back together, the distance between them is widened, and then the respective cylinders f on each mounting base i and i' are moved.

Activate f'. Then, the walls c, c' attached to the tips of both cylinders f, f' and the restraining claws d, d' are moved forward together, and the large-diameter bar e is held by both the restraining claws d.

constraint between d'.

On the other hand, when restraining a bar e with a small diameter, the screw shaft is rotated in the opposite direction to move the mounting bases i and i' forward together. Operate the upper cylinders f and f'. and the walls c, a
' and the restraining claws d, d' are moved forward together, and both the restraining claws d
, d' to restrain the small diameter bar e.

[Problems with the prior art] However, in this case, in order to move the mounting bases i, i' back and forth, the rotary drive device n, which is provided with a ', must be formed on the screw shaft at the top and bottom of the mounting bases i, i'. Therefore, there are problems in that the structure is complicated and the manufacturing cost is high. Furthermore, when restraining the bar e, the upper and lower screw shafts k of the mounting bases i and i' are used as described above.

k' is rotated or reversed according to the size of the diameter, and both mounting bases i and i' are advanced and retreated.
, i' are actuated to advance and retreat the opposing walls c, a' and the restraining claws d, d', respectively. For this reason, the screw shaft must be rotated in forward and backward directions in accordance with the size of the diameter, and both mounting bases i and i' must be moved forward and backward, resulting in a problem that adjustment work is time-consuming.

Furthermore, there was a drawback in that scales and the like scattered from the bar material adhered to the screw shaft, impairing the sliding of the screw groove and causing failure.

[Objective and Structure of the Invention] Therefore, the present invention aims to simplify the structure, reduce failures, and provide a bar restraining device that can easily restrain a bar regardless of its diameter. and
In order to achieve this object, the present invention provides a bearing at the bottom of a bar material transport line in which a plurality of transport rollers are provided at regular intervals, a wall plate is provided on both sides so as to sandwich the transport line, and each bearing The end portions of the arm rods extending downward from the back surface of the wall plate are supported so that the wall plate can be opened and closed in an inverted figure-eight shape or a figure-eight shape on the conveyance line, and the wall plate is opened and closed. A hydraulic cylinder is provided for moving each wall plate, an eave is protruded inwardly from the upper end of each wall plate, and a claw piece that can protrude above the conveying surface of the conveying roller when the wall plate is closed is provided on each wall plate. This is a bar material restraining device characterized by being provided protruding from the lower part.

[Function] When both wall plates are moved in a figure-eight shape, both claw pieces project upward from the conveyance surface of the conveyance roller, and the bar material is placed on the upper surface of the claw pieces. As a result, the bar material is lifted off the conveyance surface of the conveyance roller, and the bar material is surrounded by the wall plate and the eaves.

[Implementation@] Next, an embodiment of the bar restraining device of the present invention will be described with reference to FIGS. 1 to 5.

In the figure, reference numeral 1.1 indicates conveyor rows provided at regular intervals on the bar conveyance line, and the conveyor rollers 1, 1 are provided with motors 2, 2 for rotary motion, and the rods 3 are rotated by the conveyor rollers 1, 1. The bar 3 is conveyed in the direction of the arrow, and the tip of the bar 3 is inserted into a 20-inch straightening machine 4 for straightening the bend of the bar 3. A horizontal table 5 is fixedly installed between the transport rollers 1, 1 to prevent the bar 3 from coming off from between the rollers.

Bearings 6, 6 are provided below the conveyance line consisting of the lever conveyor roller 1.1, and wall plates 7a, 7b are provided on both sides so as to sandwich the conveyor line. The end portions of arm rods 8a and 8b, which are fixed so as to extend, are supported by the bearings 6 and 6, respectively. On the other hand, the wall plate 7a,
Mounting pieces 10a and 10b are fixedly installed on the base plate 9 on both sides of 7b, and hydraulic cylinders lla and l are attached to the mounting pieces 10a and lob.
lb is pivotally connected via pin 12at12b. and,
Wall board 7a.

The ends of the piston rods of the hydraulic cylinders 4.1a, llb are connected to the connecting pieces 7b, 3a, 13b via pins 14a, 14b. In addition, the wall plate 7a
, 7b, eaves 15a, 15b protrude inwardly from the upper ends thereof.
.

15c as shown by the dashed line in FIG.
A and 7b are fixed alternately. In addition, wall plates 7a and 7b
At the bottom are claw pieces 16a, 16b, 16c = 4
6h are similarly provided alternately in a protruding manner. Note that the claw pieces 16a, 16
b, 16c, . . . , 16h are provided to protrude from the lower inner surface of the wall plates 7a, 7b so that they can protrude above the conveying surface of the conveying rollers 1, 1 when the wall plates 7a, 7b are closed.

However, in this bar restraining device, as shown in FIG. 1, the hydraulic cylinders lla and llb are contracted to
Open it in a reverse eight shape and use the claw pieces 16a, 16b, 16C.
. . . By supporting the bar 3 on the conveying roller 1 with the 16h lower than the conveying surface of the conveying roller 1 and rotating the conveying roller 1, the bar 3 is moved to 20 l. It is carried into the type straightening machine 4. When the bar 3 is rotated and straightened using the 20-inch straightening machine 4, the hydraulic cylinders lla and llb are extended to straighten the wall plates 7a and 7b as shown in FIG. 2 or 3. The claw pieces 16a, 16b, . . . , 16h are made to protrude from the conveyance surface of the conveyance roller 1 by closing and moving in a figure-eight shape on the conveyance line.
The bar 3 is supported on 6b...16h, and the eaves 15a
, 15b, 15c above the bar 3 and intersecting with each other, the bar 3 is surrounded by wall plates 7a, 7b, eaves 15a, 15b, 15c, and claw pieces 16a, 16b.
...Continued by 16h. In this case the hydraulic cylinder l
Unlike pneumatic cylinders, la and llb can be stopped at a fixed length even during extension by adjusting the supply amount of hydraulic oil, so in the case of a large diameter bar 3, as shown in Figure 2. Then, the hydraulic cylinders 11a and llb are stopped to such an extent that the wall plates 7a and 7b do not come into contact with the bar 3. Also, bar material 3
If the diameter of the hydraulic cylinder 1 is small, as shown in Fig. 3,
1a.

By further expanding 11b, both wall plates 7a.

By narrowing the interval between the bars 7b, even if the bar 3 has a small diameter, it can be restrained. In this way, in the case of a hydraulic cylinder, the operating stroke can be controlled by adjusting the supply amount of hydraulic oil, so it can be easily controlled by computer control and can be automated to always match the rod diameter. .

[Effects of the Invention] As described above, the bar restraining device of the present invention supports a pair of wall plates on a conveyance line so that they can be opened and closed in an inverted eight-shape or eight-shape, and the opening and closing is performed by a hydraulic cylinder. By doing this, the spacing between both wall plates when closing can be adjusted according to the thickness of the bar, so it can be used in a wide range from large diameter bars to small diameter bars, and the surroundings of the bar can be adjusted between both wall plates. By surrounding the bar with an eave and a claw piece, it is possible to reliably prevent the swinging phenomenon of the bar.

In addition, the overall structure is greatly simplified by eliminating the width adjustment structure using screws as in conventional restraint devices, which has beneficial effects such as significantly reducing equipment costs and reducing the risk of failure. .

[Brief explanation of the drawing]

The drawings show one embodiment of the bar restraining device of the present invention, and FIG. 1 is a cross-sectional view, FIGS. 2 and 3 are cross-sectional views showing the operating state of FIG. 1, and FIG. The figure is a partially cutaway side view, FIG. 5 is a plan view, and FIG. 6 is a cross-sectional view of a conventional bar restraint device. DESCRIPTION OF SYMBOLS 1... Conveyance roller, 3... Bar material, 4... Roll type straightening machine, 6... Bearing, 7a, 7b... Wall plate, 8a,
8b...Arm rod, lla, llb hydraulic cylinder, 1
3a, 13b... connection piece, 15a, 15b,
15cm eaves, 16a, 16b. 16c...16h...Claw piece.

Claims (1)

[Claims] Bearings are provided below a bar material conveyance line in which a plurality of conveyor rollers are provided at regular intervals, wall plates are provided on both sides to sandwich the conveyor line, and the tip of an arm rod extends downward from the back surface of each wall plate. The wall plate is supported on the conveyance line by supporting the parts on the bearings so that the wall plate can be opened and closed in an inverted eight-shape or a figure-eight shape, and hydraulic cylinders are provided for opening and closing the wall plate, respectively. It is characterized in that an eave projects inward from the upper end of each wall plate, and a claw piece that can protrude above the conveying surface of the conveying roller when the wall plate closes is provided protruding from the lower part of each wall plate. bar restraint device.