JPH0787947B2 - Roll tightening and fixing device and method, and roll changing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll tightening device for tightening and fixing a roll fitted to a roll shaft to a roll shaft in a roll type processing machine such as a cold roll forming machine. The present invention also relates to a roll tightening and fixing method, and a roll rearranging method using the roll tightening and fixing device.

[Prior Art] FIG. 6 shows a forming stand using a conventional roll tightening and fixing device in a cold roll forming machine. The roll 1 is fitted on a roll shaft 2, and the roll shaft 2 is supported by a drive side roll stand 3 and a work side roll stand 4 on the drive side (right side in the figure) and the work side (left side in the figure), respectively. The conventional method of tightening and fixing the roll 1 on the roll shaft 2 is to screw the nut 5 into the threaded portion 2a formed on the working side end portion of the roll shaft 2 as shown in the figure, and to insert the nut 5 with the circular washer 6 interposed. It was done by tightening 5. At this time, the roll 1 has bushes (inner races) 7a and 8a of bearings 7 and 8 provided on the work side roll stand 4.
And the flange 2b on the drive side of the roll shaft 2 are fastened and fixed. The stand type of the illustrated roll forming machine is a type in which the work side roll stand 4 is slidable in the roll shaft longitudinal direction (left and right direction in FIG. 6) and can be pulled out from the roll shaft 2.

[Problems to be Solved by the Invention] In a roll forming machine, a lot of labor and time are required for roll changing work required when changing a molding type, and it is strongly required to perform the roll changing work promptly. There is. However, when the rolls are recombined in the above conventional molding machine, the nut 5 is removed from the threaded portion 2a and the circular washer 6 is removed.
After pulling out, the work side roll stand 4 having the bearings 7 and 8 integrally is pulled out from the roll shaft 2, then the roll 1 is pulled out from the roll shaft 2, and a new roll is inserted into the roll shaft 2 and then the bearing is again fed. The working side roll stand 4 integrated with 7, 8 is fitted into the roll shaft 2, then the circular washer 6 is fitted, and the nut 5 is fitted into the screw portion 2a.
It is complicated because the roll 1 is screwed in and the roll 1 is tightened and fixed to the roll shaft 2 via the bushes 7a and 8a of the bearings 7 and 8.

By the way, in the above roll rearrangement work, when the work side roll stand 4 is pulled out from the roll shaft 2, the roll shaft 2 cantilevered by the drive side roll stand 3 bends and its tip side hangs down. When the stand 4 is fitted into the roll shaft 2 again, the roll shaft 2 has to be lifted and the work is difficult. However, as a way to improve this problem, a screw at the working side end of the roll shaft is used. A cylindrical roll exchanging jig, which has a conical shape at one end and is approximately the same diameter as the roll shaft diameter, is proposed, which is screwed into the portion (see Japanese Utility Model Publication No. 53-43868). This roll exchange jig has a conical shape on one end side of the roll exchange jig when the work side roll stand is fitted into the roll shaft, so that the conical surface serves as a guide to facilitate the fitting work. Also, it can protect the screw part and prevent its damage,
Although the effects such as the above can be obtained, the fastening and fixing of the roll itself is only performed by a normal nut, and the nut must be removed from the threaded portion of the roll shaft when the roll is reassembled, which is complicated.

The present invention has been made to solve the above-mentioned conventional drawbacks, and provides a roll tightening / fixing device, a roll tightening / fixing method, and a roll shuffling method capable of easily and quickly performing a roll shuffling operation. The purpose is to

[Means for Solving the Problems] The invention according to claim 1 for solving the above problems is a roll tightening and fixing device for tightening and fixing a roll fitted to a roll shaft to the roll shaft, wherein a working side end of the roll shaft is provided. A cylindrical portion having a screw hole to be screwed into the screw portion formed in the portion and having an outer diameter not larger than the outer diameter of the roll shaft; and a substantially integral portion integrally provided on the opposite side of the cylindrical portion from the screw hole inlet side. A roll nut having a frusto-conical portion and a tool hanging portion provided on the substantially frusto-conical portion or the cylindrical portion for hanging a nut tightening tool, and a roll shaft smaller than the outer diameter of the roll nut. And a horseshoe-shaped washer having an inner diameter larger than the outer diameter of the screw portion.

According to a second aspect of the present invention, there is provided a roll fastening method for fastening a roll fitted on a roll shaft to the roll shaft using the roll fastening apparatus according to the first aspect. The horseshoe-shaped washer is fitted from the outer periphery of the roll shaft to the portion protruding from the bearing, the roll nut is screwed into the threaded portion at the tip of the roll shaft and tightened, and the roll is tightened to the roll shaft via the horseshoe-shaped washer. It is characterized by fixing.

According to a third aspect of the present invention, there is provided a roll type machine having a work side roll stand that can be pulled out from the roll shaft, wherein the roll tightening and fixing device is used, and the horseshoe-shaped washer is removed from the roll shaft. Also, with the roll nut screwed into the threaded portion of the roll shaft, pulling out the work side roll stand from the roll shaft or fitting it into the roll shaft, and pulling out the roll from the roll shaft or fitting it into the roll shaft. This is a roll rearrangement method characterized by performing work.

[Operation] In the above configuration, since the horseshoe-shaped washer has an inner diameter smaller than the outer diameter of the roll nut, the roll nut screwed into the threaded portion of the roll shaft can tighten and fix the roll to the roll shaft via the horseshoe-shaped washer. .

On the other hand, since the outer diameter of the roll nut is not larger than the outer diameter of the roll shaft, you can simply remove the horseshoe washer and leave the roll nut screwed onto the threaded portion of the roll shaft.
The work side roll stand, work side chock and roll can be pulled out or fitted.

Therefore, the roll can be clamped and fixed to the roll shaft by the roll tightening and fixing method described in claim 2, and the roll can be recombined by the roll recombining method described in claim 3.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

In FIG. 1, a roll shaft 2 fitted with a roll 1
Drive side roll stand 3 and working side roll stand 4
The drive side (right side in the figure) and the working side (left side in the figure) are supported by and, respectively. In each of the roll stands 3 and 4, the lower roll shaft 2 is supported by a bearing 8 directly attached to the roll stands 3 and 4, and the upper roll shaft 2 is attached to a reduction screw 9 and is a vertically movable chock ( It is supported by the bearing 7 in the bearing box 10.

A roll tightening / fixing device 11 for tightening and fixing the roll 1 on the roll shaft 2 is composed of a roll nut 12 and a horseshoe-shaped washer 13, and the roll nut 12 is also shown in FIGS. 2, 3 (a) and (b). As shown, the roll shaft 2 has a threaded hole 14 that is screwed into a threaded portion 2a formed at the end of the working side, and the outer diameter is not larger than the outer diameter of the roll shaft 2 (in the embodiment, the outer diameter of the roll shaft 2 is larger than the outer diameter of the roll shaft 2). (The diameter is the same as or slightly smaller than the diameter.) Cylindrical portion 15 and the screw hole 14 of the cylindrical portion 15
It is composed of a frusto-conical portion 16 integrally provided on the inlet side and the opposite side, and a square hole (that is, a tool) for inserting a square bar spanner (that is, a nut tightening tool) in the center of the frusto-conical portion 16. The hanging part) 17 is provided. Further, a circumferential groove 18 for facilitating the roll insertion is provided in the vicinity of the boundary between the cylindrical portion 15 and the frusto-conical portion 16.

In the above roll forming machine, the rolls are rearranged as follows. In the state shown in FIG. 1, a square bar spanner (not shown) is inserted into the square hole 17 of the roll nut 12 and rotated to loosen the roll nut 12, and the horseshoe washer 13 is directly taken out from the outer periphery of the roll shaft 2. Next, when the roll nut 12 is tightened by the gap in which the horseshoe-shaped washer 13 is fitted, the roll shaft 2 and the roll nut 12 are connected with substantially the same outer diameter as shown in FIG. This is the upper and lower roll shaft 2
After that, the working-side roll stand 4 having the bearings 7 and 8 integrally is moved to the outside and pulled out from the roll shaft 2, and the roll 1 is pulled out from the roll shaft 2.
Next, the roll for the next molding product is inserted into the roll shaft 2, the working roll stand 4 is fitted into the roll shaft 2, and then the roll nut 12 is loosened to form a gap,
Insert the horseshoe-shaped washer 13 from the outer circumference of the roll shaft 2 into the gap, and tighten the roll nut 12 with a square bar spanner. It is fastened with and fixed to the roll shaft 2.

In the roll reassembling work described above, the work can be performed without removing the roll nut 12 from the roll shaft 2, which is extremely efficient, and there is no fear of loss of the roll nut or the like, which facilitates the work. Further, as shown in FIG. 4, when the horseshoe washer 13 is removed and the roll nut 12 is tightened, the roll shaft 2 and the roll nut 12 are connected to each other with substantially the same outer diameter.
The operation of sliding along the roll shaft 2 at the time of pulling out and fitting is smoothly performed.

Further, when the working roll stand 4 is removed from the roll shaft 2, the working shaft end of the roll shaft 2 cantilevered by the driving roll stand 3 hangs down slightly, but the working end of the roll nut 12 is truncated. Since the conical portion 16 has a conical shape, the conical surface serves as a guide when the working-side roll stand 4 is fitted, and facilitates the fitting work. Further, the work of fitting the roll 1 is facilitated by the truncated cone portion 16.
The frusto-conical portion 16 does not have to be an exact conical surface, and may be a smooth tapered shape.

Further, since the work side roll stand 4 and the roll 1 can be pulled out and fitted while the roll nut 12 is screwed into the screw portion 2a, damage to the screw portion 2a can be prevented.

The tool hooking portion provided on the roll nut 12 is not limited to that of the above-mentioned embodiment, and for example, as shown in FIG. 5, a hexagonal rod portion 20 is provided at the tip of the truncated cone portion 16 and the hexagonal rod portion 20 A configuration in which a wrench is applied to rotate the roll nut 12, or, although not shown, a recess is provided on the outer periphery of the cylindrical portion 15, and a nut tightening tool is hung in the recess,
There are various possibilities.

In addition, in the above embodiment, the forming stand that can be pulled out from the roll shaft by moving the working roll stand in the roll shaft longitudinal direction has been described.
It can also be applied to a universal joint type molding stand. In this case, when reassembling the roll, disconnect the roll shaft from the universal joint, remove the stand cap from the roll stand, and then integrate the roll, the roll shaft, and the chocks on both sides of the roll shaft (in some cases, the stand cap is also integrated). (2) Lifting with a crane and taking it out of the roll stand, it is usually transported to the roll changing place, but when performing roll changing at this roll changing place, without removing the roll nut from the roll shaft, Similarly, pull-out fitting of the chock and pull-out fitting of the roll can be performed.

Further, the present invention is not limited to a cold roll forming machine, but the roll nut is tightened and fixed to the roll shaft by a roll nut that is screwed into the threaded portion of the working side end of the roll shaft. Applicable.

[Effects of the Invention] Since the present invention is configured as described above, the following effects are achieved.

Without removing the roll nut from the roll shaft, the work side roll stand, work side chock, and rolls can be quickly pulled out, and rolls can be easily and quickly reassembled.

After removing the horseshoe-shaped washer, by tightening the roll nut by the gap where the horseshoe-shaped washer fits, the roll nut and roll shaft are connected with almost the same outer diameter, so the work side roll stand or work side chock or When the rolls are pulled out and fitted, the operation of sliding them is performed smoothly.

Since the tip of the roll nut is substantially frustoconical and smaller than the bearing diameter of the roll stand and the hole diameter of the roll, it is easy to guide the work side roll stand, the work side chock, or the roll when fitting. In particular, the tip end of a cantilever-supported roll shaft usually hangs down, but the drooping of the tip end of the roll shaft has a great effect of facilitating the above-mentioned induction by the truncated cone.

Since the roll can be pulled out and fitted while the roll nut is screwed, there is no risk of damaging the threaded portion of the roll shaft.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a front view of a partial cross section of a forming stand of a cold roll forming machine, FIG. 2 is an exploded perspective view of the same part, and FIG. Front view of the nut,
FIG. 3 (B) is a right side view of the same, FIG. 4 is a front view of a partial cross section of the forming stand when the rolls are reassembled, FIG. 5 is a perspective view showing another embodiment of the roll nut, and FIG. It is a front view of a partial section of a forming stand showing a conventional roll tightening and fixing device. 1 ... Roll, 2 ... Roll shaft, 2a ... Screw part,
2b ... Collar part, 3 ... Drive side roll stand, 4 ... Working side roll stand, 7,8 ... Bearings, 7a, 8a ... Bushing, 9 ... Reduction screw, 10 ... Chock, 11 ... Roll tightening and fixing device, 12 …… Roll nut, 13 …… Horse-shaped washer, 14 …… Screw hole, 15 …… Cylindrical part, 16 …… Conical conical part, 17 …… Square hole (tool hanging part), 18 … Circumferential groove, 20 …… Hexagonal bar (tool hook).

Claims (3)

[Claims] 1. A roll tightening and fixing device for tightening and fixing a roll fitted into a roll shaft to a roll shaft, the roll tightening and fixing device having a screw hole to be screwed into a screw portion formed at a working side end of the roll shaft. A cylindrical portion whose outer diameter is not larger than the outer diameter of the roll shaft, a substantially frustoconical portion integrally provided on the opposite side of the cylindrical portion from the screw hole entrance side, and the substantially frustoconical portion or cylinder. A roll nut having a tool hook for hooking a nut tightening tool, and a horseshoe-shaped washer having an inner diameter smaller than the outer diameter of the roll nut and larger than the outer diameter of the threaded portion of the roll shaft. Roll clamping device consisting of. 2. A roll tightening and fixing method for tightening and fixing a roll fitted on a roll shaft to a roll shaft by using the roll tightening and fixing device according to claim 1, wherein the roll shaft is fitted to a bearing on the working side. Of the horseshoe-shaped washer from the outer periphery of the roll shaft, and the roll nut is screwed into the threaded portion at the tip of the roll shaft and tightened, and the roll is attached to the roll shaft through the horseshoe-shaped washer. A roll tightening and fixing method characterized by tightening and fixing. 3. A roll reassembling method using the roll tightening and fixing device according to claim 1 in a roll type processing machine having a work side roll stand that can be pulled out from the roll shaft, wherein the horseshoe-shaped washer is removed from the roll shaft. With the roll nut removed and screwed into the threaded portion of the roll shaft, the work side roll stand is pulled out from the roll shaft or fitted into the roll shaft, and the roll is pulled out from the roll shaft or to the roll shaft. A roll reassembling method characterized by performing fitting work.