JPH074626B2 - Bar material restraint device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod-shaped material restraining device, and more specifically,
When the rod-shaped material is inevitably bent when it is rolled to the required diameter in the rolling process, when it is straightened by the straightening machine in the subsequent process,
Effectively restrain the tail end swinging caused by the rotation of the rod-shaped material to suppress the generation of noise and flaws during correction.
The present invention relates to a rod-shaped material restraint device that achieves high-speed straightening by a roll.

Conventional technology Long round bar steel with a circular cutting surface (hereinafter referred to as "bar-shaped material") is passed through a large number of rolling rolls in the rolling process, and the diameter is gradually converged to form a bar with the required diameter. To do. Therefore, the rod-shaped material obtained was
Bending such as warping inevitably occurs due to plastic deformation during the rolling, and in many cases it cannot be put to practical use as it is.
Therefore, in order to straighten this rod-shaped material into a straight bar, it is passed through a straightening machine arranged downstream of the rolling process. As this straightening machine, various types have been proposed according to the purpose of straightening, but in order to straighten the bending of the round bar, an inclined roll type straightening machine in which the axes intersect at a required angle is generally used. There is. In this case, since the straightening target is a long rod-shaped material, conventionally, a multi-stage inclined roll type straightening machine in which a large number of staggered rolls are arranged vertically is preferably used.

Problems to be Solved by the Invention As described above, when a rod-shaped material having a bend in the rolling process is passed through the straightening machine to straighten and remove the bend, the following problems have been conventionally encountered. It was That is, when the rod-shaped material is fed to the straightening machine one by one and the feed-side end is gripped by the straightening roll, the rod-shaped material is rotated in the circumferential direction. At this time, since the rod-shaped material is long, the trailing end of the rod-shaped material revolves largely as the material rotates (so-called tail swing phenomenon). As a result, the trailing end of the rod-shaped material hits the conveying roller irregularly to generate a large amount of noise and cause a hit flaw on the surface of the material.

Further, the tail swing phenomenon becomes greater as the material to be straightened is supplied to the straightening machine at a high speed, and therefore the material supply can be inevitably performed at a low speed. Moreover, if the rod-like material is left unrestrained without being restrained, the bending cannot be sufficiently corrected by passing the rod-shaped material through the straightening machine only once. Therefore, using a multi-stage inclined roll type straightener equipped with a pair of upper and lower straightening rolls in multiple stages, the straightening is carried out step by step, but this means that the production time is reduced due to the increase of loss time in the straightening process. Means In addition, this multi-stage roll type straightening machine requires an independent rotation drive device for each pair of straightening rolls, and thus has a drawback of increasing manufacturing costs and running costs.

OBJECT OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in correcting a bend of a rod-shaped material carried out from a rolling process with a straightening machine.
The present invention has been proposed in order to suitably solve this problem. By restraining the trailing movement phenomenon of the rod-shaped material at the time of supplying it to the straightening machine, the noise and the occurrence of flaws are suppressed, and in addition, it is a two-roll type straightening. An object of the present invention is to provide a restraint device for a rod-shaped material which can be corrected at high speed by using a machine.

Means for Solving the Problems In order to preferably solve the above-mentioned object, a rod-shaped material restraining device according to the present invention forms a pair by sandwiching a rod-shaped material conveying path that is vertically conveyed toward a straightening machine. The walls are arranged so as to face each other, and restraining claws are alternately extended to the lower portions of the respective walls, and the pair of walls are moved close to each other at the timing when the rod-shaped materials enter the straightening machine, and It is characterized in that it is configured to restrain the material.

Examples Next, a rod-shaped material restraint device according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to preferred examples. FIG. 1 is a schematic perspective view showing a main configuration of a restraint device according to the present invention, and FIG. 2 is arranged as a single unit in a path line forming a feed passage for a rod-shaped material on the upstream side of a straightening machine. FIG. 3 is a plan view of the device of the present invention, and FIG. 3 is a transverse sectional view taken along line III-III of the device shown in FIG.

(Regarding Base and Table) In FIG. 2, reference numeral 10 indicates an inclined two-roll type straightening machine for straightening the bending of the rod-shaped material 12, and the restraint device 14 according to the present invention is located upstream of the straightening machine 10. In addition, one to three rod-shaped materials 12 are arranged according to the length of the rod-shaped material 12 to be straightened.
For example, a rod-shaped material 12 carried out from a rolling process (not shown)
Are carried one by one by a carrying roller 16 having a shape shown in the figure, and are carried toward the straightening machine 10.

A base for supporting the restraint device 14 as a single unit, straddling the path line of the rod-shaped material 12 constituted by arranging a large number of the transport rollers 16 at predetermined intervals.
18 are arranged. And the pass line L of the base 18
Tables 20, which will be described in detail later, are respectively supported on the left and right pedestals so as to be close to and away from the pass line L, and each table 20 is provided with a horizontally extending restraining claw 22. The upright wall 24 is also supported so as to be able to move toward and away from the pass line L. The components of the table 20, the restraining claws 22 and the upright walls 24, which are respectively arranged on the left and right of the base 18, are almost the same. Therefore, only the structure on the left side in FIG. 1 will be mainly described, and the members of the structure on the right side will be designated by the same reference numerals with "a".

As can be seen from FIGS. 1 and 3, flat tables 20 and 20a are provided on the left and right sides of the base 18 across the pass line L, respectively.
Are arranged so as to be horizontally slidable, and upright walls 24 are supported on each table 20 in parallel to the pass line L. That is, the table 20 is supported on the base 18 via a guide surface having, for example, a "groove" groove structure, and is configured to be horizontally slid with respect to the pass line L and can be brought close to and away from the pass line L. Both tables 20, 20a facing each other across the pass line L
Are imparted with movement toward and away from each other under the action of rotation of the screw shaft. For example, as shown in FIG.
Heads 26, 26a, which are threaded female threads, are arranged on the bottom surfaces of the 20, 20a. Further, bearings 28, 28a arranged on the base 18
, A common shaft 30 is rotatably and horizontally supported, and male screws 32 and 32a, which are threaded as reverse threads on both sides of the common shaft 30, are inserted and screwed into the two facing heads 26 and 26a. ing.

The common shaft 30 is connected at one end thereof to an output shaft 36 of a speed reducer 34 arranged on a base 18 via a coupling 38, and an input shaft 40 of the speed reducer 34 is a motor serving as a drive source. 42
Via a chain 44 (the input shaft 40 extends along the pass line L and also functions as the input shaft of the speed reducer 34 in another adjacent restraint device 14). Therefore, by driving the motor 42 and the speed reducer 34,
If the common shaft 30 is rotated in either forward or reverse direction, the two tables 2 are moved under the reverse screw action of the heads 26, 26a and the common shaft 30.
It will be appreciated that 0 and 20a slide across the pass line L and slide on the base 18 in the direction in which they approach or separate from each other.

(Upright wall and its moving mechanism) Next, an upright wall 24 is provided on each table 20 so as to be parallel to the pass line L and to be movable toward and away from the pass line L. For example, this upright wall 24
A support plate 56 is attached to the wall surface of the upright wall 24 opposite to the pass line L via a reinforcing frame 54, which is made of a steel plate material having a shape as shown in the figure. This upright wall 24
A pair of guide members 46, 4 spaced apart on the table 20.
The guide rods 48 and 48 slidably inserted in 6 respectively, the support plate
It is supported via 56 so that it can approach and separate from the pass line L. A linear actuator 50 typified by, for example, a pneumatic cylinder is disposed between the guide members 46, 46 on the table 20, and a tip of a piston rod 52 of the linear actuator 50 is provided on a support plate 56 provided on the upright wall 24. It is fixed. Therefore, by urging the cylinder 50 with pressure, the upright wall 24 is moved within the allowable stroke of the piston rod 52.
Is given a movement toward and away from the pass line L. The cylinder 50 of the upright wall 24 and the pass line L
By synchronizing the operation with the cylinder 50a connected to the other upright wall 24a which is disposed so as to face each other, both upright walls 24, 24a synchronously approach and separate from each other.

Further, each of the upright walls 24 is configured to be long along the pass line L as shown in FIGS. 1 and 2. Therefore, two tables 20 having the same structure are arranged adjacent to each other along the pass line L, and a plurality of guide members 46 and supporting plates 56 provided on both tables 20 and 20 upstand the upright wall.
It is preferred to commonly support 24. In this case as well, the cylinders 50, 50 on the adjacent tables 20, 20 are of course synchronously biased forward and backward.

(Regarding the restraining claw and the regulating plate) The pair of upright walls 24, 2 that face each other across the pass line L
As best shown in FIG. 1, 4a is configured asymmetrically for the reasons described below, and the L-shaped shape shown in FIG. 5 is formed below the wall surface of each upright wall 24 on the side directed to the pass line L. The required number of restraint claws 22 are fixed. The L-shaped restraining claws 22 are disposed alternately on the opposite wall surfaces of the upright walls 24, 24a facing each other at a predetermined interval, and therefore, the restraining claws 22 contact and interfere with each other. There is no. As shown in FIGS. 5 and 6, the claw portion of the restraining claw 22 is formed with an inclined surface 58 that gradually descends toward the pass line L. The upper limit 58 close to the base of the claw on this inclined surface 58
a is located at a level above the material carrying surface 1 of the conveying rollers 16 arranged at a predetermined interval on the pass line L.
The lower limit 58b of the inclined surface 58 is dimensioned so as to be located at a level below the material carrying surface 1 of the conveying roller 16. By setting the dimensions in this way, when the constraining claws 22 and 22a come close to each other and the two claws approach each other as described later, the slant surface of the claw portion causes the rod-shaped material 12 carried by the transport roller 16 to move from the pass line L. The rod-shaped material 12 is restrained while being lifted slightly upward.

Further, above the inner wall surfaces of both upright walls 24, 24a on the side directed to the pass line L, the rod-shaped material 12 fed by the transport roller 16 is provided.
Restricting plates 60, 60a for restraining the upper part of the above are alternately arranged above the pass line L so as to intersect with them. As shown in FIG. 3, the restriction plates 60 and 60a extend horizontally more than the restraining claws 22 and 22a, so that they interfere with each other when the upright walls 24 and 24a are brought close to each other. In order to prevent this, as shown in FIG. 1, step portions 62 are alternately formed on the upper end portion of one upright wall 24, and the other upright wall 24a includes
On the contrary, a corresponding stepped portion 62a is attached.

Action of the Invention Next, the action of the rod-shaped material restraining device according to the present invention having the above-described structure will be described. The rod-shaped material 12 which is sequentially rolled in a rolling process (not shown) and is formed into a round bar having a predetermined diameter is carried on the conveying rollers 16 one by one through a feeding device such as a walking beam. It is supplied toward the straightening machine 10 shown in. At this time, the restraint device 14 according to the present invention
Depending on the length of the rod-shaped material 12 to be straightened,
As described above, 1 to 3 units are arranged upstream of 10. The rod-shaped material 12 to which plastic deformation such as bending has been imparted in the rolling process is shown in FIGS. 5 (a) and 6 until just before the tip of the rod-shaped material 12 in the feeding direction is fed to the straightening machine 10.
As shown in FIG. 5A, the upright walls 24 and 24a that face each other across the pass line L are in the open position, and
The rod-shaped material 12 is allowed to be conveyed by 16 pieces.

The rod-shaped material 12 straightened by the straightening machine 10 may have various diameters. Therefore, before using the device of the present invention, the restraint width is roughly adjusted according to the diameter of the rod-shaped material 12. That is, the motor 42 and the speed reducer 34 are driven to drive the common shaft.
Rotate 30 in the required direction, and set its male threads 32, 32a and head 2
Coarse adjustment of the restraint width is performed by bringing the two tables 20, 20a facing each other across the pass line L by a required distance under the action of the reverse screw with the 6, 26a.

The rod-shaped material 12, the timing to be fed to the upper and lower straightening rolls provided in the straightening machine 10, for example, is detected by a photoelectric detector (not shown) consisting of a photocell, through the electrical control circuit system, each of the above-mentioned each An operation command is given to the cylinder 50 arranged on the table 20. As a result, both cylinders 50, 50a facing each other with the pass line L interposed therebetween are pressure-biased to extend the corresponding piston rods 52, 52a, and the guide member 4
The upright walls 24, 24a supported by the 6, 46a are moved in the directions in which they approach each other.

Along with this movement, the restraining claws 22 and 22a arranged in the required number on the upright walls 24 and 24a respectively hold the rod-shaped material 12 as shown in FIGS. 5 (b) and 6 (b). To slightly lift it from the conveying roller 16. That is, as mentioned above,
The upper limit 58a of the inclined surface 58 formed on the claw portion of the restraining claw 22 is,
It is set so as to be located at a level above the carrying surface 1 of the transport roller 16, and the lower limit 58b of the inclined surface 58 is set to be below the carrying surface 1. Therefore, when both restraining claws 22 and 22a come close to each other, the rod-shaped material 12 is finally lifted by the inclined surfaces 58 and 58 in the process of its movement as shown in FIG. 5 (b). As described above, the rod-shaped material 12 is lifted upward from the carrying surface 1 of the conveying roller 16, but the rod-shaped material 12 is not fixedly held by the both restraining claws 22 and 22a.
Therefore, the rod-shaped material 12 is gripped by a straightening roll (not shown) and drawn into the straightening machine 10 and supplied as it is.

EFFECTS OF THE INVENTION According to the present invention, the rod-shaped material 12 is rotated in the circumferential direction at the moment when it is fed into the straightening machine 10, and the tail end of the material 12 is swung due to its bending. As shown in (b) and FIG. 6 (b), the turning range of the trailing end is significantly restricted due to the mutual proximity of the two restricting claws 22, 22a.
As a result, the tail swing phenomenon is reliably suppressed, and the occurrence of noise and flaws is significantly reduced.

Further, since the large turning of the trailing end of the long rod-shaped material 12 can be effectively suppressed, it becomes possible to pass through the straightening machine at a high speed, and the bending can be achieved by passing the double roll straightening machine once only. It can be corrected almost completely. Therefore, the straightening can be performed in a shortened time as compared with the conventional method in which the rod-shaped material is sequentially passed by using the multi-stage straightening machine. As described above, as a result of using the two-roll type straightening machine for the straightening in the post-process, the roll driving source can be reduced, and the facility cost and other running costs can be reduced.

In the illustrated embodiment, an upright wall is used as a means for restraining the rod-shaped material, but this wall is not necessarily required to be upright, and it may be an inclined wall or another horizontal wall.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a main configuration of a restraint device according to the present invention, and FIG. 2 is a plan view of the present invention device arranged as a single unit on a path line of a rod-shaped material on the upstream side of a straightening machine. 3, FIG. 3 is a cross-sectional view of the device shown in FIG. 1 taken along the line III-III, FIG. 4 is a left side view of the device shown in FIG. 1, and FIG.
FIG. 5A is a cross-sectional view showing a state before a rod-shaped material having a relatively large diameter is restrained by a restraining claw by the device of the present invention, and FIG. 5B is a cross-sectional view showing a rod-shaped material having a relatively large diameter. Fig. 6 (a) is a cross-sectional view showing a state of being restrained by the restraining claws, and Fig. 6 (a) is a cross-sectional view showing a state before restraining a rod-shaped material having a relatively small diameter by the restraining claws by the device of the present invention, Fig. 6 (b). FIG. 4 is a transverse cross-sectional view showing a state in which a rod-shaped material having a relatively small diameter is restrained by restraint claws by the device of the present invention. 10 ... Straightener, 12 ... Rod-shaped material 14 ... Restraint device, 16 ... Conveyor roller 22 ... Restraining claw, 24 ... Upright wall

Claims (2)

[Claims] 1. A pair of walls are arranged so as to face each other across a conveying path of a rod-shaped material conveyed in a vertical direction toward a straightening machine, and restraining claws are extended so as to be alternately opposed to the lower portions of the respective walls. The rod-shaped material restraining device is configured to restrain the rod-shaped material by moving the pair of walls closer to each other when the rod-shaped material enters the straightening machine. 2. The restraining claw includes an inclined surface directed to a pass line forming a rod-shaped material supply passage, and the upper limit of the inclined surface is greater than that of a material carrying surface of a conveying roller arranged at a predetermined interval in the path line. The rod restraint device according to claim 1, wherein the rod-like material is located at an upper level, and the lower limit of the inclined surface is dimensioned so as to be located at a level below the material carrying surface.