JPS5927715A - Tightening roll device - Google Patents

Abstract

PURPOSE:To provide a titled device made capable of to preventing a formed and welded round pipe from sagging and of passing easily its welded seam, by forming a desired gap between the upper peripheral parts of a pair of hollow rolls rotating in the same plane, and bringing their lower peripheral parts into mutual contact, in constituting the device. CONSTITUTION:A pair of hollow rolls 3, 3 are supported in the same plane so as to make their rotary axial lines parallel, by blocks 6, 7 which are provided freely slidably to a main body 10 by a main gear 52 having a handle 51, and the diameter of the upper part 33A of the roll 3, 3 is made smaller than that of the lower peripheral part 33B by a gap formed between the parts 33A at the time when the parts 33B are brought into mutual contact. Thus, when a circular cross-sectional path for a formed and welded round pipe is formed by ring- shaped peripheral grooves 33 of the rolls 3, 3, the lower side of the pipe 1 is prevented from a downward sagging deformation by the closed contacting part 38, on the other hand, a welded seam of the pipe 1 is easily passed through the upper gap 37.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tightening roller device, and more particularly to a tightening roller device 4 for tightening formed circular pipes that are rounded to a circular cross section and have welded joints.

A widely known technique is to form a tape-shaped hoop material into a circular cross-section while feeding it in the longitudinal direction, and to weld the longitudinally extending joints using a welding torch 2, as shown in FIG. However, the material is thin, has high thermal conductivity, and is elastic (= 1, for example, in the case of thin stainless steel ■j1, the weld seam 4, which is 1% of the circle - 110 downstream of the welding position) is elastic. In order to prevent this, a pair of so-called squeeze rollers 8, 8 are used to hold down and stabilize the circular tube from both sides. However, in the case of a thin material with high thermal conductivity, the position of the squeeze roller becomes red-hot due to welding heat, so there is a drawback that it tends to sag downward and become deformed.

The present invention has been made to eliminate these conventional drawbacks, and provides a novel tightening roller device that can fix the welded joint of a formed circular pipe while preventing its deformation. It is.

In FIGS. 2 and 148, two block bodies 6 and 7 are slidably provided on the main body 10, and as shown more clearly in FIG. A tightening roller, generally designated 8, is rotatably provided via a bearing 85.

As clearly shown in FIG.
(It consists of a main body 82 that extends 71, a disc-shaped cover 81 that is placed over the hollow part 34 to seal it, and a ring-shaped circumferential groove body 83 that is attached around the main body 82. A cooling pipe 1786 for supplying a cooling medium such as water, for example, is inserted coaxially therethrough, and a hole 89 is a hose connection portion communicating with the cooling pipe 86.

The configuration of the circumferential groove body 33 of the tightening roller 8 will be explained in more detail with reference to FIGS. 2 and 3. The diameter Dt of the upper peripheral edge 88A of the circumferential groove body 88 is equal to the lower peripheral edge 88B.
The diameter of is formed smaller, the difference D1-1),
0) The values are as shown in FIG.
The width is equal to the width of the gap 87 between the image tightening rollers 3.8 when the lower peripheral edges 3813 of the image tightening rollers 3813 are arranged in close contact with each other.

However, when both the tightening rollers 8, 8 of the lever are arranged in the above state, as shown in Figure @2, their circumferential groove body 8B defines a passage with a circular cross section surrounding the circular pipe l. I will do it. However, the lower part of the lever, which has a circular cross section, is closed by the abutment part 88 of the lower peripheral edge part 88B.
Similarly, a gap 87 is provided above the passage d). This collision part 88 is a red-hot circle α1
This prevents deformation of the material from sagging downward, and also prevents the upper clearance 8.
7 facilitates the passage of the circular tube l through the weld seam 4.

Next, the moving device 5 for the tightening rollers 8, 8 will be explained.

A feed screw shaft 53A is screwed into one of the block bodies 6 and 7 on which the tightening rollers 8 and 8 are rotatably supported at a screw retaining portion 61, and
Another round screw IItt+54A is inserted in hole 62 with r(+
11 I am doing it. Further, the other flock body 7 has another feed screw lll1! parallel to the feed screw shaft 53A! +54 A
is threadedly engaged in the threaded engagement portion 71, and the feed screw shaft 58A passes through the hole 7z. These parallel feed screw shafts 58A.

A guide shaft 52A is provided parallel to these in the middle of 54A, and this guide shaft 5ZA penetrates both flock bodies 6.7 so as to be able to slide relative to each other.

What should be noted is the screw engaging part 61 and the screw retaining part 71.
and are in a relationship with opposite screws to each other.

One end 52B of the guide shaft 52A is formed into a prismatic shape, into which the main gear 52 is fitted, and a handle 51 for rotating the main gear 52 is inserted into the throat.

Gears 58 and 54 are fixed to one end of the feed screw shafts 58A and 54A, respectively.
meshes with the main gear 52 fitted to the prismatic shaft portion 52B, and therefore, when the main gear 52 rotates, both gears 58 and 54 rotate in the same direction as the main gear 52 in the opposite direction of rotation. Rotate to C. Also, when drawing the main gear 52 from the prismatic shaft portion 52B, the feed screws 1 53A and 54A are
The prismatic sleeve portions 53B individually protrude to the respective j:+A portions.

54 The operation of this roller moving device 5 will be explained next.

When the handle p) is rotated with the main shaft 52 fitted into the prismatic shaft portion 5213 of the guide shaft 52A (as shown), the main gear 52 rotates, and the gears 58 and 541 turn! It rotates in the same direction as L, so the feed screw @l+58k,
54A also rotates in the same direction. The block bodies 6 and 7 are connected to the tightening roller 3 because they are located between the opposite screws.
, 8 can be moved in opposite directions to each other, i.e., in a direction that slows the flame (I-LG), or in a direction that is far apart. Adjust the position of one tightening roller 8 individually so that the R contact seam 4 is in the center of the gap 87 between the two tightening rollers, and then adjust the position of the other tightening roller 8. It is best to individually adjust the tension rollers 8 so that they face each other at the contact portion 88, and then fit the main gear 52 into the prismatic @1 portion 52B. Before introducing the inner material 1, If you hit it, turn this handle 51 and release both rollers 8.8
The distance between them can be adjusted to open or close. Note that 8 is information +
1'11152A, l, therefore, is a fixing screw that fixes the main gear 52.

As detailed above, according to the present invention, (1) the circumference t4
11. The 1st officer and Rokube are interviewing the retainer at 'F' of the Jt body, and the upper peripheral part is open with a V gap, so the vertical 11. of the formed and welded circle 'd. Downward deformation is prevented, and there is no problem with the weld seam trace 114, resulting in a good roundness! ! !
(11) Since the cooling medium circulates, the tightening roller can be used to tighten and fix the L-C middle molecule S, and can cool it.1j It has the following effects. 1. By using the L' roller moving device, there is an effect that 611) the positioning of both tightening rollers can be made very easy, and the movement of the rollers close to each other or to remote islands can be made extremely easy.

[Brief explanation of the drawing]

Figure 1 is a schematic front perspective view showing the operating principle of the tightening roller of the present invention, Figure 2 is a front view of an embodiment of the invention, Figure 8 is a plan view, and Figure 4 is a side sectional view. It is. lO main body, l, round leaf 1.8, 3...tightening roller,
4...Welding sheet, 88k...Top periphery, 1313B
Lower periphery, 87・Gap, 84 Hollow portion. Representative Patent Attorney Takeo Masuda

Claims (1)

[Claims] Ill A pair of hollow rollers provided in the same plane so as to be slidable relative to the main body tll and with their rotational axes parallel to each other, and the diameter of the upper peripheral edge (88A) is equal to that of the lower peripheral edge. Desired clearance (37) from the IK diameter of the section (8f3B)
1tli? Tightening roller device formed smaller by i: Yi. (2) A pair of hollow rollers are provided in the same plane so that they can slide freely relative to the main body H and their rotational axes are parallel to each other, and the diameter of the upper peripheral edge (38A) is smaller than that of the local edge (
83B) smaller than the diameter of the hollow roller by a width of a desired gap (37), and the tightening roller device is characterized in that the hollow portion (84) of the hollow roller is configured with a slot so that a cooling medium circulates. t.