JPH0242006B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a guidance device for guiding rolled materials such as wire rods and bars.

(Prior Art) As is well known, in order to obtain a product with excellent dimensional accuracy by rolling, for example, a wire or bar (hereinafter referred to as "rolled material"), the guidance thereof is an important element. The more strongly the guide rollers bind the rolled material, the better their guiding function will be, but in order to bind the rolled material more strongly, the interval between the guide rollers (hereinafter referred to as "roller spacing") must be made slightly narrower than the dimensions of the rolled material. However, since the rolled material enters between the narrow guide rollers, there is a drawback that the guide rollers are likely to catch on the rollers. Therefore, a method has been proposed in which the guide rollers are wide open and stand by each time the rolled material enters, and the moment the rolled material enters between the guide rollers, the distance between the rollers is narrowed to enclose and guide the rolled material.

As a first example, as shown in FIG. 6, a hydraulic cylinder 32 is used as a means for closing the gap between the guide rollers 31. This hydraulic cylinder is installed between a pair of roller holders 33, and the hydraulic cylinder is operated by hydraulic pressure. By pushing out the rear end of the holder, the distance between the rollers can be reduced until they come into contact with the material M. When the dimensions of the material change, the adjustment bolt 34 installed between the hydraulic cylinder 32 and the roller holder 33 is used to adjust the dimensions of the material.

A second example is the one described in Japanese Patent Application Laid-Open No. 57-28609, which is equipped with a hydraulic cylinder 42 as shown in FIG. A cam 45 is fixed, and spindles 46 are attached to this slide cam on both sides.
are in contact with each other. This spindle is
A bushing screw 44 provided on each roller holder 43 allows for axial position adjustment. In this example, by reciprocating the slide cam 45, the roller holder 43 is swung, and the interval between the guide rollers 41 can be adjusted in stages. Fine adjustment of the roller spacing is performed by turning the bushing screw 44 and moving the position of the spindle 46 in contact with the slide cam 45 in the axial direction.

(Problems to be Solved by the Invention) Although improvements can be found in each of the above examples, there are still problems as shown below. First, in the first example, the roller spacing is directly adjusted by the hydraulic pressure of the hydraulic cylinder, but this spacing cannot be fixed when there is no load. In this example, the guide roller is in contact with the material and the load is always applied.
Although the strength of the load can be adjusted to some extent by hydraulic pressure, it is difficult to adjust to a weak binding force.
Furthermore, according to this example, bolts are attached to the roller holder in order to widen the range of roller spacing.
These bolts are used to adjust the distance between the rollers, but it is not easy to visually adjust the left and right bolts by the same amount, and if the bolts cannot be adjusted equally, the distance between the guide roller centers may This can cause misrolls such as the material coming off the line and hitting the roller, or causing the roller to bite on one side. Furthermore, the rolled material must be stopped during the adjustment work, which leads to a decrease in the operating rate of the rolled material.

In addition, in the second example, unlike the first example, the roller spacing can be fixed at a certain value, but since a stepped slide cam is used, the roller spacing cannot be adjusted steplessly, and as in the first example, the roller spacing can be fixed at a certain value. Since fine adjustments are made using a bushing screw, the same problem as in the first example arises, that is, the fine adjustment work is difficult and the rolled material must be stopped during the adjustment.

The first purpose of the present invention is to enable stepless and rapid setting of accurate roller spacing, and the second purpose is to enable stepless fine adjustment to shift the amount of roller opening/closing easily and accurately. The third purpose is to improve the operating rate of the rolling line by making it possible to make minute adjustments to the roller spacing even while the rolling mill is in operation.

(Means for Solving the Problems) The present invention includes a pair of roller holders 2a, 2b and guide rollers 8a, 8b. The roller holders 2a, 2b are attached to the support 1 by a shaft 3, and this shaft serves as the fulcrum of the roller holder and the center of its swing. The guide rollers 8a, 8b are rotatably provided at one end side of the roller holders 2a, 2b. A spring body 20 is provided between the other ends of the roller holders 2a and 2b to apply a spring force in a direction that brings the other ends closer together. The support body 1 is provided with a drive cylinder 10 such as a hydraulic cylinder, and a support shaft 16 that can reciprocate along the direction in which the material M enters is provided with the drive cylinder. Taper slider 17 whose outer surface is an inclined surface at both ends of this support shaft.
A, 17b are provided, and pressure rollers 19a, 19b, which are in constant contact with the taper slider, are rotatably provided on the other end side of each roller holder 2a, 2b. The present invention is equipped with means for finely adjusting the distance between the rollers. This minute adjustment means is the support shaft 16
and a screw shaft 16a having a reverse screw relationship with each other,
16b, a female threaded pipe 21 that threadably connects opposing ends of both threaded shafts, and rotation means 23, 211 that rotates this female threaded pipe. Screw shaft 16a, 1
6b and the female threaded pipe 21 constitute a turnbuckle.

(Function) The adjustment function of the interval between the guide rollers in the present invention includes one for making it correspond to the diameter of the material M to be guided and the other for fine adjustment.

First, to explain the former roller spacing adjustment function, by reciprocating the output end of the drive cylinder 10, the support shaft 16 also reciprocates, and at the same time, the taper sliders 17a, 17b also reciprocate as one, so that the pressure rollers 19a, Roller holders 2a, 2b are swung about shaft 3 while rolling roller 19b, and the distance between the guide rollers 8a, 8b is expanded or decreased, and the roller distance is adjusted by the expansion or contraction operation. Next, the latter fine adjustment effect will be explained. By rotating the female threaded pipe 21 by the rotating means 23, 211, the threaded shafts 16a, 16b reciprocate around the female threaded pipe, and along with this reciprocating movement, the taper slider 17
a, 17b and pressure rollers 19a, 19b
The roller holders 2a and 2b are interlocked via the guide rollers 8a and 8b, and the distance between the guide rollers 8a and 8b is slightly adjusted. Since the threaded shafts 16a, 16b and the female threaded pipe 21 form a turnbuckle, minute adjustments can be made using the principle of screws, and the left and right sides can be displaced equally,
The roller spacing can also be adjusted in equal increments.

(Example) Examples of the present invention will be described below with reference to the drawings.

As shown in the first and second figures, a pair of roller holders 2a and 2b are supported by eccentric pieces 3a and 3b of an eccentric shaft 3 on a guide box 1, which is a support body. The axis is the center of rotation. Worm wheels 4a, 4b are attached to the upper ends of the eccentric pieces 3a, 3b, and a worm gear 6 rotatably supported by a pedi style 5 meshes with the worm wheels.
A pair of sub-rollers 7a, 7b are attached to eccentric shafts 3 at locations where the material M is to be guided in the roller holders 2a, 2b.
The sub rollers are rotatably attached via the worm gear 6, and the spacing between the sub rollers can be adjusted by rotating the worm gear 6.

A pair of guide rollers 8a, 8b are attached to shafts 9 at the tips of the roller holders 2a, 2b (left end in FIG. 2).
It is pivotally supported by a and 9b. Guide roller 8
The distance between the rollers a and 8b is adjusted by swinging the rear end portions of the roller holders 2a and 2b using the eccentric shafts 3 and 3 as fulcrums.

The distance between the guide rollers 8a and 8b can be adjusted in response to changes in the dimensions of the material M using the adjustment means described below. That is, a hydraulic cylinder is employed as the driving cylinder 10 for operating this adjusting means, and the ram 10a serving as the output end thereof is capable of reciprocating back and forth by operating a hydraulic valve (not shown). The drive cylinder 10 is fixed to the guide box 1 via a frame. and ram 10
A bracket 11 is fixed to the tip of a.
As shown in FIG. 3, a slide bearing 12 having a wide groove 12a is fixed to the bottom surface of the bracket 11 with a bolt 13. Groove 1
A rail 15 fixed onto the guide box 1 with bolts 14 is fitted into the inside of the guide box 2a. The bracket 11 can slide on the rail 15 as the ram 10a moves back and forth. A support shaft 16 passes through both side walls of the bracket 11, and taper sliders 17a and 17b are attached to both ends of this support shaft. The outer surfaces of the taper sliders 17a and 17b are inclined inward toward the entrance side of the material M (right side in FIG. 2), and the width of the taper slider is narrowed toward the entrance side. Each taper slider 17a, 17b has a shaft 18a, 18 at the rear of the roller holder 2a, 2b.
A pressure roller 19 is pivotally supported by b.
It is in contact with a and 19b. roller holder 2a,
A spring body 20 is hooked between the rear ends of 2b. Due to the inward spring force of this spring body, the taper sliders 17a, 17b are moved to the pressure rollers 19a, 1
It is always in contact with 9b in a pressed state.

Also, the roller spacing between guide rollers 8a and 8b is as follows:
Fine adjustment can be made by the means shown below. In other words, this micro-adjustment means includes the support shaft 16 and the female threaded pipe 21.
It is equipped with a turnbuckle consisting of. The support shaft 16 consists of a right-handed threaded shaft 16a and a left-handed threaded shaft 16b, as shown in FIG. , 22b. The screw shafts 16a, 16b are key bolts 22a,
Rotation is prevented by 22b. key bolt 2
The lower ends of 2a and 22b are each threaded shaft 16a and 16b.
It is possible to slide within grooves 161a and 161b formed on the outer periphery of. The inner ends of the shafts 16a and 16b are screwed together through a female threaded pipe 21. Both end surfaces of this female threaded pipe are in contact with the inner surface of the side wall of the bracket 11, and a ratchet 23 is attached to the outer periphery of the central portion of the female threaded pipe. This ratchet is provided with a protruding round bar protrusion 24 for use when rotating the ratchet.

Next, a method for adjusting the distance between the guide rollers 8a and 8b will be explained.

A case will be described in which the distance between the guide rollers 8a and 8b is adjusted to be narrower from the position indicated by the solid line in FIG. 2, for example. First, the ram 10a of the drive cylinder 10
When the bracket 11 is moved forward, the bracket 11 is also moved forward, and at the same time, the taper sliders 17a and 17b located on both sides of the bracket are also moved forward together.
While rolling the roller holders 2a and 2b,
The distal end side of the roller holder is swung inward using the guide rollers 8a and 8b as a fulcrum, so that the guide rollers 8a and 8b approach each other, and the distance between the rollers becomes narrower. At this time, the bracket 11 and the taper sliders 17a, 17
b performs a restrained movement by the rail 15 and slide bearing 12, so each guide roller is adjusted to the same amount. Through this adjustment operation, the roller interval corresponds to the diameter of the material M.

If it is necessary to make small adjustments to the roller spacing, perform the following operations. To narrow the roller interval slightly, for example, use the round bar protrusion 24, turn the ratchet 23, rotate the female threaded pipe 21, and move the threaded shafts 16a, 16b to the outside, and the taper slider 17a , 17b press the pressure rollers 19a, 19b outward, thereby causing the roller holders 2a, 2b to pivot slightly inward at the tip end sides of the roller holders 2a, 2b with the shafts 3, 3 as fulcrums. As a result, the roller spacing is adjusted slightly narrower.

In the above example, a ratchet 23 was used as a means for rotating the female threaded pipe, but as shown in the fourth and fifth figures, a polygonal thick part 2 is provided at the center of the outer periphery of the female threaded pipe.
11 may be formed. The female threaded pipe may be rotated by applying a spanner S to this thick portion. This example has a simpler structure than the above example because the ratchet mechanism can be omitted.

(Effect of the invention) The present invention has the following effects.

First, the taper slider can be reciprocated by the drive cylinder, and since this taper slider is always in contact with the pressure roller attached to the roller holder, the roller spacing is stable, and the desired roller spacing can be maintained accurately. It can be set quickly, the rolled material can be bound without causing any bumps, and it can be finely adjusted in a stepless manner, making it possible to cope with slight changes in the size of the rolled material. Second, since the pressure roller is provided, the movement of the taper slider is smooth and there is less wear on the contact surface between the taper slider and the pressure roller, contributing to a longer life of the device and reducing errors in setting the roller interval. Thirdly, by simply turning the female threaded pipe that makes up the turnbuckle, the threaded shaft moves, making it possible to adjust the roller spacing by a small amount evenly on the left and right sides, making it possible to finely adjust the roller spacing and guide in response to changes in rolling conditions. To easily and accurately readjust the roller spacing when the rollers are worn out. Fourthly, adjustments can be made while the rolling mill is in operation, contributing to improving the operating rate of the rolling line.

[Brief explanation of drawings]

Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is an enlarged partial cross-sectional side view of the main part, Fig. 4 is a partially enlarged side view of another embodiment of the main part, and Fig. 5 is FIG. 4 is a cross-sectional view taken along the line, and FIGS. 6 and 7 are plan views showing conventional examples, respectively. 1...Support body, 2a, 2b...Roller holder,
3...Shaft, 8a, 8b...Guide roller, 10...
...Drive cylinder, 10a...Ram, 16...Support shaft, 16a, 16b...Screw shaft, 17a, 17b
... Taper slider, 19a, 19b ... Pressure roller, 20 ... Spring body, 21 ... Female threaded pipe, 211, 23, 24 ... Rotation means, M ... Material.

Claims (1)

[Scope of Claims] 1. A pair of roller holders are provided on a support body with a shaft serving as a fulcrum of the roller holders as the center of swing, a guide roller is provided on one end side of both roller holders, and a guide roller is provided on the other end of both roller holders. A spring body that applies a spring force in the direction of bringing the other end of the roller holder closer is provided between the two sides, and a drive cylinder is provided on the support body, and the ram of this drive cylinder is capable of reciprocating along the direction in which the material enters. A support shaft is provided, a taper slider whose outer surface is an inclined surface is provided at both ends of the support shaft, and a pressure roller that is in constant contact with the taper slider is rotatably provided at the other end of each of the roller holders. A guidance device for rolling material, characterized in that it is provided in a. 2. A pair of roller holders is provided on the support body with the axis serving as the fulcrum of the roller holders as the center of swing, a guide roller is provided on one end side of both roller holders, and a roller is provided between the other end sides of both roller holders. A spring body is provided that applies a spring force in a direction in which the other end of the holder approaches, a drive cylinder is provided on the support body, and a support shaft that is movable back and forth in the direction in which the material enters is provided on the ram of the drive cylinder. , the support shaft is composed of threaded shafts having opposite threads to each other, and one end of each threaded shaft facing each other is connected with a female threaded pipe,
The female threaded pipe is provided with a rotation means for rotating the female threaded pipe, a taper slider whose outer surface is an inclined surface is provided at the other end of the threaded shaft, and a tapered slider whose outer surface is an inclined surface is provided at the other end of each of the roller holders. A rolling material guidance and guidance device comprising a rotatably provided pressure roller that is in constant contact with the taper slider.