JPH087940Y2 - Spacer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a spacer for adjusting the roll width of a split roll fitted to a roll shaft.

[Prior Art] For example, in a cold roll forming machine, spacers are used for positioning the individual rolls of a split roll fitted on a roll shaft in the roll width direction (this is referred to as roll width adjustment). A general type of spacer of this type is a mere cylindrical spacer. An example of using this cylindrical spacer will be described with reference to FIG. 5. The left and right upper rolls 2a and 2b fitted to the upper roll shaft 1 are spaced by the cylindrical spacer 3 fitted to the roll shaft 1 at a predetermined distance W ₁ And the left and right lower rolls 5a and 5b, which are similarly fitted to the lower roll shaft 4, are also set to a predetermined dimension W ₂ by the cylindrical spacer 6. The cylindrical spacers 3 and 6 are actually a combination of a plurality of them and have a predetermined dimension W.
Set to ₁ and W ₂ .

If the products to be molded are of the same product type (same type of cross-sectional shape) and only the size is changed, the spacers are replaced according to the size to be changed and the roll width W ₁ and W ₂ are changed to adjust the roll width. Cylindrical spacer 3,6 above
Then, the rolls 2a, 2b, 5a, 5b must be removed from the roll shafts 1, 4, which is extremely complicated.

In order to improve the drawbacks of the cylindrical spacers 3 and 6, a weight spacer 7 shown in FIG. 6 and a horseshoe spring spacer 8 shown in FIG. 7 have been proposed.

The weight spacer 7 is provided with a notch 7a having a width dimension slightly larger than the outer diameter of the roll shaft, and can be directly fitted on the roll shaft from the outer peripheral side.

The horseshoe-shaped spring spacer 8 is formed by connecting a plurality of short columnar pieces 8a with an elongated spring material 8b and is formed into a substantially horseshoe shape extending over the roll shaft. The thickness of the hook 8a is the spacer width dimension. The horseshoe-shaped spacer 8 spreads the opening width w and is fitted on the roll shaft from the outer peripheral side. However, in the fitted state, the elasticity of the spring material 8b narrows the opening width w again and does not easily fall from the roll shaft. .

[Problems to be Solved by the Invention] Since the weight spacer 7 and the horseshoe spring spacer 8 can be attached to and detached from the roll shaft from the outer periphery, the attaching and detaching work is more efficient than the cylindrical spacers 3 and 6, but
It has the following drawbacks.

That is, in the case of the weight spacer 7, the spacer may drop when the roll tightening nut is loosened in order to replace the spacer.

In addition, both spacers 7 and 8 are 1
Since only one interval can be set and the spacer must be replaced when adjusting the roll width, the spacer replacement work becomes frequent and the spacers may be misplaced.

Further, when a plurality of horseshoe-shaped spring spacers 8 are stacked and used, the hooks 8a must be set together, and the work is complicated. Further, since the spring material 8b is pushed out and attached to and detached from the roll shaft, the attachment and detachment is troublesome.

Further, in both cases, since the spacers 7 and 8 also have openings on the circumference and have an uneven shape in the circumferential direction, the contact balance with the roll becomes unbalanced and the roll may be inclined.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a spacer that does not have the above-mentioned problems and can easily perform roll width adjustment.

[Means for Solving the Problems] The present invention, which solves the above problems, is a spacer for adjusting the roll width of a split type roll fitted on a roll shaft, and is a spacer that is directly adjacent to the outer circumference of the roll shaft. It is composed of a first spacer piece and a second spacer piece to be fitted, and the first spacer piece and the second spacer piece have convex portions and concave portions which are alternately formed in the circumferential direction on the respective facing surfaces. , The convex portion and the concave portion have such a size and shape that the convex portions of the respective spacer pieces can abut each other when the spacer pieces are opposed to each other or the convex portion and the concave portion can be fitted to each other. The second spacer piece has a key groove that closely fits the key on the roll shaft, and the first spacer piece rotates the first spacer piece clockwise or counterclockwise on the roll shaft. A wide key groove for restricting rotation of the first spacer piece so that when the key is hit, the convex portion and the concave portion of both spacer pieces are fitted to each other or the convex portions come into contact with each other. Is characterized by.

[Operation] In the spacer having the above configuration, the second spacer piece is engaged with the key on the roll shaft and does not rotate on the roll shaft. On the other hand, the first spacer piece can rotate leftward or rightward on the roll shaft until the right or left wall surface of the wide key groove of the first spacer piece hits the key. Then, at the position where the first spacer piece is rotated to one end, the convex portion and the concave portion of both spacer pieces can be fitted to each other, and when both spacer pieces are fitted to each other, the spacer formed by both spacer pieces is formed. The width will be narrow. Further, at the position where the first spacer piece is rotated to the other end, the convex portions of both spacer pieces are in a position where they can be correctly aligned and brought into contact with each other. The width of the space created by is wide. In this way, two types of spacer width can be set without changing the space.

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

In FIG. 1, the left and right upper rolls 2a, 2b fitted on the upper roll shaft ₁ are set to a predetermined size W ₁ by a spacer 11 fitted on the roll shaft 1 according to an embodiment of the present invention. The distance between the left and right lower rolls 5a and 5b fitted on the lower roll shaft 4 is set to a predetermined dimension W ₂ by the same spacer 11 as above. In this embodiment, W ₁ =
W ₂ . Further, spacers 12 having different dimensions but the same structure as the spacer 11 are fitted on both outer sides of the upper rolls 2a and 2b and both outer sides of the lower rolls 5a and 5b. The upper rolls 2a and 2b and the spacers 11 and 12 are fastened and fixed on the roll shaft 1 by a roll fastening nut 13 screwed onto one end of the upper roll shaft 1. The lower rolls 5a and 5b are similarly tightened and fixed by the roll tightening nut 13.
Reference numeral 14 is a roll stand, reference numeral 15 is a roll shaft 1,4
It is a chock (bearing box) that supports.

The spacer 11 is composed of a first spacer piece 41 and a second spacer piece 42 that are directly fitted to the outer circumference of the roll shaft 1 so as to be adjacent to each other.

The first spacer piece 41 is shown in FIGS.
As shown in detail in (c), the end surface on the side that contacts the roll
41a is formed flat over the entire circumference, and has convex portions 44 and concave portions 46 that are alternately formed in the circumferential direction on the opposite side. Similarly, the second spacer piece 42 is shown in FIGS.
As shown in detail in (c), the end surface on the side that contacts the roll
42a is formed flat over the entire circumference, and has convex portions 45 and concave portions 47 alternately formed in the circumferential direction on the opposite side. The convex portions 44, 45 and the concave portions 46, 4 of both spacer pieces 41, 42
7, the protrusions 44, 45 of the spacer pieces 41, 42 can come into contact with each other when the spacer pieces 41, 42 are opposed to each other (see FIG. 4B), or the protrusions 44, 45 and recess 4
6 and 47 have such dimensions that they can be fitted to each other (see FIG. 4 (a)). In the illustrated example, each spacer piece 4
There are four convex portions 44 and 45 of 1,42. Naturally, the recesses 46 and 47 are also four places.

The second spacer piece 42 has a key groove 42b that closely fits the key on the roll shaft 1.

On the other hand, as shown in FIG. 2, the first spacer piece 41 is provided with a wide key groove 41b for accommodating the key K on the roll shaft 1. This key groove 41b whose groove width is wider than the actual width of the key K allows rotation of the first spacer piece 41 on the roll shaft 1, but
As shown in FIG. 2B, the key groove 41b has a groove width that allows the key K to relatively move from the central position of one convex portion 44 to the central position of the adjacent concave portion 46. Therefore, when the first spacer piece 41 is rotated clockwise or counterclockwise on the roll shaft 1, the wall surface on the left side or the right side of the key groove 41b hits the key K so that both the spacer pieces 4b and 4b.
Positions where the convex portions 44, 45 of the 1, 42 and the concave portions 46, 47 are fitted to each other (state of FIG. 4 (a)), or positions where the convex portions 44, 45 contact each other (FIG. 4 (b)) The rotation of the first spacer piece 41 is regulated so as to take the above state.

The spacer 11 having the above structure is incorporated into the roll shaft 1 or 4 together with the rolls 2a, 2b or 5a, 5b. In this spacer 11, as shown in FIG. 4 (a), the convex portion 45 of the second spacer piece 42 is used. When the tip end surface 45a of the first spacer piece 41 is brought into contact with the bottom surface T ₂ of the recess 46 of the first spacer piece 41, and as shown in FIG. Part 44
It is possible to set two kinds of spacer width dimensions as in the case of being brought into contact with the tip end surface T ₁ of.

The operation for setting the spacer width will be described. Since the second spacer piece 42 is tightly fitted to the key K, it does not rotate on the roll shaft 1. On the other hand, the first spacer piece
The roll 41 can be rotated leftward or rightward on the roll shaft 1 until the right or left wall surface of the wide key groove 41b of the first spacer piece 41 hits the key K. Then, at the position where the first spacer piece 41 is rotated to one end, the convex portions 44, 45 and the concave portions 46, 47 of both spacer pieces 41, 42 are in a position where they can be fitted to each other. When they are fitted together, the spacer width formed by both spacer pieces 41, 42 becomes narrow. Further, at the position where the first spacer piece 41 is rotated to the other end, the protrusions 44, 45 of both spacer pieces 41, 42 are
The projections 4
When 4, 45 are brought into contact with each other, the spacer width formed by both spacer pieces 41, 42 becomes wide. In this way, two types of spacer width can be set without replacing the spacer.

The above spacer width setting work (that is, roll width adjustment work) is performed in a narrow space on the roll forming machine.
In particular, the relative rotation angles of both spacer pieces 41, 42 are properly adjusted so that the convex portions 44, 45 of both spacer pieces 41, 42 come into contact with each other, and the state is maintained and fixed by the roll tightening nut 13. Is not always easy. However, according to the spacer 11 described above, if the first spacer piece 41 is simply rotated rightward or leftward until it stops, the relative rotation angle of both spacer pieces 41, 42 required for roll width adjustment is automatically determined. Since it is decided, the roll width adjustment work is easy.

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

When two types of roll widths are required and the roll width is adjusted from one roll width to the other roll width, loosen the roll tightening nut and simply move the first spacer piece to the right with respect to the second spacer piece. Since it suffices to rotate both directions to the left or to the right to align them, it is not necessary to take out the spacer from the roll shaft, and the roll width adjustment work becomes efficient. In addition, there is no risk that the spacers will be inserted incorrectly.

Also, since this roll width adjustment work is performed in a narrow space on the roll forming machine, the relative rotation angles of both spacer pieces are correctly adjusted and maintained so that the convex portions of both spacer pieces contact each other. Then, it is not always easy to tighten and fix with the roll tightening nut, but in this invention, if the first spacer piece is simply rotated to the right or left with respect to the fixed second spacer piece, it can be rolled. Since the relative rotation angle of both spacer pieces required for width adjustment is automatically determined, it is extremely easy to correctly bring the protrusions into contact with each other.

Since the spacer width is determined, it is not necessary to check the width dimension when adjusting the roll width.

Since the spacer has a cylindrical shape and there is no opening on the circumference, there is no risk of falling even when the roll tightening nut is loosened. Also, there is no risk of the roll tilting when the roll and spacer are clamped and fixed by the roll tightening nut.

[Brief description of drawings]

FIG. 1 is a view showing a usage state of a spacer according to an embodiment of the present invention, FIG. 2 (a) is a perspective view of a first spacer piece of the same spacer, and FIG. 2 (b) is a plan view of the first spacer piece. Fig. 2 (c) is a front view of the first spacer piece, Fig. 3 (a) is a perspective view of the second spacer piece of the same spacer, and Fig. 3 (b) is a plan view of the second spacer piece. Fig. 3, Fig. 3 (c) is a front view of the second spacer piece, Figs. 4 (a), (b) are explanatory views of an example of using the same spacer, and Fig. 5 is an explanation of an example of using a conventional spacer. 6 and 6 are perspective views of another conventional spacer, and FIG. 7 is a perspective view of yet another conventional spacer. 2a, 2b, 5a, 5b …… Roll 1,4 …… Roll shaft 11 …… Spacer 41 …… First spacer piece 41b …… Wide keyway 42 …… Second spacer piece 42b …… Keyway 44, 45 …… Convex 46,47 …… Concave

Claims (1)

[Scope of utility model registration request] 1. A spacer for adjusting the roll width of a split type roll fitted to a roll shaft, wherein the spacer is a first spacer piece and a second spacer piece that are directly fitted to the outer circumference of the roll shaft adjacent to each other. The first spacer piece and the second spacer piece have convex portions and concave portions alternately formed in the circumferential direction on the respective facing surfaces, and the convex portion and the concave portion face both spacer pieces. The second spacer piece has a size and shape such that the convex portions of the respective spacer pieces can abut each other or the convex portion and the concave portion can be fitted with each other when the second spacer piece is tightly fitted to the key on the roll shaft. The first spacer piece has a key groove to be fitted, and the first spacer piece hits a key when the first spacer piece is rotated clockwise or counterclockwise on the roll shaft, and the convex and concave portions of both spacer pieces are engaged. Spacer There characterized by comprising the wide keyway width for restricting the rotation of the first spacer piece so as mating position or protrusions each other to each other assume a position abutting.