JPH0227921Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a roll mounting device for a cantilever mill.

(Prior Art) A cantilever mill is mainly used as a block mill for finish rolling of steel bars and wire rods. Conventionally, the roll unit side portion of the cantilever mill is configured as shown in Fig. 16. was.

That is, the roll unit 62 is removably fitted to the tip of the roll shaft 61, the roll 63 is fitted onto the outside of the roll shaft 61, and the base is tapered to the roll shaft 61 so that the base portion is connected to the outer peripheral surface of the roll shaft 61 and the roll 63. A tapered sleeve 6 that can be inserted and removed between the inner peripheral surfaces
4, and the roll 6 is fitted onto the tip of the sleeve 64.
The roll 63 is fixed to the roll shaft 61 in cooperation with the sleeve 64 by pressing the roll 63 toward the proximal end of the roll shaft 61 with respect to the axial direction. An elastic body 73 is provided at the axial center of the roll shaft 61 and whose base end is fixed to the roll shaft 61 and whose distal end projects outward in the axial direction of the roll shaft 61. An equipment shaft 66 located outside the roll shaft 61 is provided at the tip of the elastic body 73, and a cylinder block 67 for pushing and pulling out the roll unit 62 is removably fitted onto the tip of the equipment shaft 66. The cylinder block 67 is connected to the hydraulic cylinder 68 and the nut body 69.
It consists of. And the hydraulic cylinder 68
The housing 70 is fitted onto the equipment shaft 66 in a relatively unrotatable manner, and the engaging portion 71 of the equipment shaft 66 prevents the piston 72 from coming off to the side opposite to the roll unit 62 side. It is a single-acting type that can be pressed against a surface.

Further, on the outer peripheral surface of the housing 70, a nut body 69 that is pressed by the housing 70 of the hydraulic cylinder 68 due to the elastic force of the elastic body 73 during operation and presses the pressing body 65 toward the roll 63 side slides in the axial direction. It is attached to the outside so that it can move freely.

Further, the nut body 69 and the pressing body 65 are moved in the pulling direction by the drawer body 74 which pulls out the roll unit 62 when the housing 70 of the hydraulic cylinder 68 slides relative to the piston 72 and moves away from the end face of the roll shaft 61 in the axial direction. They are releasably interlocked.

By the way, in the above mill, roll unit 6
2 to the roll shaft 61, first configure the roll unit 62, and then attach the roll unit 62 to the roll shaft 61.
2 onto the roll shaft 61.

Thereafter, the piston 72 of the hydraulic cylinder 68 is pressed against the end surface of the roll shaft 61 to stretch the elastic body 73, and the housing 70 is slid relative to the piston 72 to move the shaft from the end surface of the roll shaft 61. spaced apart toward the heart.

Next, the nut body 69 is screwed toward the pressing body 65 to bring the base end surface of the nut body 69 and the distal end surface of the pressing body 65 into contact in the axial direction.

In this state, the hydraulic pressure of the hydraulic cylinder 68 is released, and the roll unit 62 is pushed through the equipment shaft 66, the housing 70 of the hydraulic cylinder 68, and the nut 69 by the elastic force of the elastic body 73.

However, in this case, when the elastic force of the elastic body 73 and the reaction force from the roll unit 62 toward the nut body 69 are balanced, the pushing of the roll unit 62 is stopped. The operation of pushing the roll unit 62 by manipulating the nut body 68 and the nut body 69 had to be repeated several times, making it difficult to install the roll unit 62 easily.

Furthermore, no means is provided for regulating the elongation of the elastic body 73, and when the roll unit 62 is attached to and detached from the roll shaft 61, a severe tensile force acts on the elastic body 73, which may cause damage to the elastic body 73. There was also an issue that could be the cause.

Furthermore, since the cylinder block 67 is only provided on the distal end side of the elastic body 73 via the equipment shaft 66, if the elastic body 73 is damaged as described above, the cylinder block 67 will fly away together with the equipment shaft 66. There was also the problem that it was very dangerous to release the liquid.

The present invention allows the roll unit to be easily installed, does not apply severe tensile force to the elastic body, and even if the elastic body is damaged, the roll unit can be easily installed.
To provide a roll mounting device for a cantilever mill that is safe and prevents cylinder blocks, roll units, etc. from flying out together with equipment shafts.

(Means for Solving the Problems) In order to achieve the above object, the feature of the present invention is that the roll unit 10, which is removably fitted to the tip of the roll shaft 1, is externally attached to the roll shaft 1. A roll 11 to be fitted, a tapered sleeve 12 which is tapered coupled to the roll shaft 1 and whose base is inserted and removably inserted between the outer peripheral surface of the roll shaft 1 and the inner peripheral surface of the roll 11, and a tapered sleeve 12 which is fitted onto the tip of the sleeve 12. It is made impossible to pull out to the side opposite to the roll 11 side, and the roll 11
and a pressing body 13 that cooperates with the sleeve 12 to fix the roll 11 to the roll shaft 1 by pressing it toward the proximal end of the roll shaft 1 in the axial direction. An elastic body 19 whose base end is fixed to the roll shaft 1 is provided. The equipment shaft 23 protruding outward is inserted so as to be movable in the axial direction and not relatively rotatable, and is brought into contact with the base of the equipment shaft 23 in the axial direction to the roll shaft 1, thereby lengthening the elastic body 19 to its natural length. A retaining portion 9a is provided to prevent the equipment shaft 23 from detaching from the roll shaft 1 when the equipment shaft 23 is extended further than the roll shaft 1. 28, the housing 31 is fitted onto the equipment shaft 23 so as to be movable relative to the equipment shaft 23 in the axial direction and not relatively rotatable, and the housing 31 is fitted relative to the pistons 32, 33 and the equipment shaft 23 toward the roll unit 10 side. By moving in the axial direction, the retaining portion 9a
A double-acting hydraulic cylinder 2 that pushes the sleeve 12 in a state in which the sleeve 12 is brought into contact with the equipment shaft 23 in the axial direction.
9 is screwed into the outer circumferential surface of the housing 31 so as to be freely retractable in the axial direction, and is pressed by the housing 31 of the hydraulic cylinder 29 due to the elastic force of the elastic body 19 during operation, thereby moving the pressing body 13 toward the roll 11 side. A stopper 46 is screwed onto the outer circumferential surface of the distal end of the equipment shaft 23 so as to be able to move forward and backward in the axial direction and to be detachable.The housing 31 of the hydraulic cylinder 29 and A stopper surface 48 that restricts the movement of the pistons 32 and 33 in the axial direction to the side opposite to the roll unit 10 side.
, the nut body 30 and the pressing body 13 are moved to the side opposite to the roll unit 10 side, and the housing 3 of the hydraulic cylinder 29 is moved.
A drawer body 49 that pulls out the pressing body 13 and the sleeve 12 by moving in the axial direction relative to the pistons 32, 33 and the equipment shaft 23 to the opposite side is releasably connected in the drawing direction. It is in.

(Function) According to the present invention, when installing the roll unit 10 and the cylinder block 28, first manually fit the roll unit 10 onto the small diameter portion 7 of the roll shaft 1, and then insert the roll unit 10 inward in the axial direction. While pushing the cylinder block 28 as far as possible to the side,
The stopper 46 is then fitted and fixed.

Next, the housing 31 of the hydraulic cylinder 29 is moved in the axial direction relative to the pistons 32, 33 and the equipment shaft 23, so that the piston 33 comes into contact with the stopper surface 48 of the stopper 46, and the housing 31 is moved into the sleeve. Approach the 12th side.

As a result, the elastic body 19 is expanded, the equipment shaft 23 comes into contact with the retaining portion 9a in the axial direction, and the equipment shaft 23 is fixed to the roll shaft 1.

In this state, the housing 31 is further inserted into the sleeve 1.
By sliding toward the second side, the sleeve 12 is pushed between the outer peripheral surface of the roll shaft 1 and the inner peripheral surface of the roll 11.

Next, the housing 31 is moved to the side opposite to the roll unit 10 side, and brought into contact with the stopper surface 48 of the stopper 46, and the elastic body 19 is expanded.

In this state, the nut body 30 is rotated to bring the nut body 30 and the pressing body 13 into contact.

After that, when the hydraulic pressure of the hydraulic cylinder 29 is released, the nut body 30 presses the pressing body 13 due to the elastic force of the elastic body 19, and the pressing body 13 presses the roll 11.
is pressed toward the base end of the roll shaft 1.

Next, when removing the roll unit 10 and cylinder block 28 from the roll shaft 1, the housing 31 of the hydraulic cylinder 29 is removed from the roll unit 10.
The elastic body 19 is moved to the opposite side to come into contact with the stopper surface 48 of the stopper 46, and the elastic body 19 is expanded.

Thereafter, the nut body 30 is rotated, and the nut body 30 pulls out the pressing body 13 via the drawer body 49, and the pressing of the roll 11 by the pressing body 13 is released.

Next, the hydraulic pressure of the hydraulic cylinder 29 is released to allow the elastic body 19 to have its natural length, and the stopper 46 is pulled out from the equipment shaft 23 by a desired amount to create a desired amount of clearance between the stopper surface 48 of the stopper 46 and the housing 31. form.

In this state, the housing 31 is moved to the side opposite to the roll unit 10 side, and the nut body 30,
Pressing body 13 via drawer body 49 and pressing body 13
and pull out the sleeve 12.

Then, the stopper 46 and the cylinder block 28
and remove the roll unit 10 from the equipment shaft 23 and roll shaft 1.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a roll shaft, which is disposed in a pair of upper and lower parts in a casing 2 and is rotatably supported via a bearing 3 and a cartridge 5. There is. The tip side of roll shaft 1 is
The middle part in the axial direction becomes a smaller diameter part 7, and the smaller diameter part 7
The midway side in the axial direction is a tapered portion 7a tapered toward the tip, and the tip side of the small diameter portion 7 is a spline portion 7b. A through hole 8 is formed through the axial center of the roll shaft 1.
The tip side has a large diameter portion 9 that has a larger diameter than the midway portion in the axial direction.
It is said that At the midway point in the axial direction of the inner circumferential surface of the large diameter portion 9, three retaining portions 9a with a center angle of 60 degrees that protrude radially inward are formed at equal intervals in the circumferential direction to prevent the large diameter portion 9 from coming off. A fitting portion 9b is located closer to the base than the portion 9a.

Reference numeral 10 denotes a roll unit that is fitted to the roll shaft 1 in a relatively unrotatable and removable manner;
, a tapered sleeve 12 , and a pressing body 13 .

The roll 11 is placed on the sleeve 1 at the rolling pass line position.
2, which rotates integrally with the roll shaft 1 via the roll shaft 1, and is externally fitted on the tapered portion 7a of the roll shaft 1, and can be moved inward in the axial direction by attaching and detaching it to the base of the small diameter portion 7. Fillet ring 1 freely fitted
Blocked by 4. The outer circumferential surface of the roll 11 indicated by a solid line in FIG. 1 indicates the outer circumferential surface when not in use, and the outer circumferential surface indicated by an imaginary line in the figure indicates the outer circumferential surface when discarded.

The tapered sleeve 12 has an inner circumferential surface on the base side tapered toward the tip, is tapered coupled to the tapered portion 7a of the small diameter portion 7, and is inserted and removably pushed between the outer circumferential surface of the tapered portion 7a and the inner circumferential surface of the roll 11. be caught. Further, the tip end side of the sleeve 12 is the spline portion 7 of the small diameter portion 7.
b, and the sleeve 12
A circumferential protrusion 15 is formed at the tip of the outer circumferential surface.

The pressing body 13 presses the roll 11 toward the base of the roll shaft 1 in the axial direction, and cooperates with the sleeve 12 to fix the roll 11 to the roll shaft 1. A key 16 is attached to the tip of the sleeve 12. It is detachably fitted onto the outside so that it can move freely in the axial direction via the shaft and cannot rotate relative to it. The base side of the inner circumferential surface of the pressing body 13 has a small diameter portion 17 smaller in diameter than the tip side.
When the small diameter portion 17 engages with the circumferential protrusion 15, the pressing body 13 cannot be pulled out from the sleeve 12. At the tip of the outer circumferential surface of the pressing body 13, three protrusions 18 having a center angle of 60 degrees and projecting outward in the radial direction are formed at equal intervals in the circumferential direction.

19 is an elastic body exemplified by a tension bar;
It is detachably provided in the through hole 8 of the roll shaft 1,
The base end portion is detachably fixed to the base end portion of the roll shaft 1. In addition, the tip end side of the elastic body 19 has a bush 2.
0 to the roll shaft 1.

Reference numeral 23 denotes an equipment shaft, which is provided concentrically with the distal end of the roll shaft 1 and protrudes outward in the axial direction.The base end is inserted into the large diameter portion 9, and the elastic body 19
It is screwed into the tip and removably fixed by a set bolt 24. At the base end of the equipment shaft 23, there is a protrusion 2 with a center angle of 60 degrees that protrudes radially outward.
5 are formed at equal intervals in the circumferential direction, corresponding to each other. Each of these protrusions 25 is fitted into the fitting part 9b and engaged with each of the retaining parts 9a in the extraction direction, and the above-mentioned fitting is performed as follows. That is, with each protrusion 25 positioned between adjacent retaining parts 9a in the circumferential direction, the equipment shaft 2
After screwing the proximal end of the elastic body 19 to the distal end of the elastic body 19 which has been released from the roll shaft 1 and inserting it into the large diameter part 9, the equipment shaft 23 is rotated and the projection 25 is inserted into the large diameter part 9.
This corresponds to the retaining portion 9a in the axial direction. The fitting portion 9b has a longer length in the axial direction than the proximal projection 25, and the equipment shaft 23 is movable in the axial direction by the difference in length between the two. The difference is taken as the elongation of the elastic body 19,
By abutting the retaining portion 9a and the protrusion 18 in the axial direction, the equipment shaft 23 is prevented from coming off the roll shaft 1 in a state where the elastic body 19 is extended beyond its natural length.

Reference numeral 26 denotes a comb that is detachably interposed between the large diameter portion 9 and the base end of the equipment shaft 23, and has three protruding pieces 27 with a center angle of 60 degrees that protrude in the axial direction and are equally spaced in the circumferential direction. Then, each protruding piece 27 is inserted between the circumferentially adjacent retaining part 9a and the protruding part 25, and the holder 26
The head portion is fixed to the retaining portion 9a with a bolt, so that the base end portion of the equipment shaft 23 is externally fitted onto the distal end portion of the roll shaft 1 so as to be relatively unrotatable.

Reference numeral 28 denotes a cylinder block which is removably fitted to the middle of the equipment shaft 23 in the axial direction, and is composed of a double-acting hydraulic cylinder 29 and a nut body 30. The hydraulic cylinder 29 includes a housing 31, proximal and distal pistons 32, 33, tie rods 34 that are equally spaced in the circumferential direction and connect the pistons 32, 33, and a spring 35 such as a disc spring. , hydraulic oil supply pipe 55, etc. Reference numeral 56 is a self-seal type quick-fitting and detachable pipe joint.

The housing 31 is spline-coupled to the outer circumferential surface of an intermediate part in the axial direction of the equipment shaft 23 so as to be relatively slidable in the axial direction and relatively non-rotatable.
33 and the equipment shaft 23 in the axial direction toward the sleeve 12.
2 is pushed in, and the proximal end surface can move toward and away from the distal end surface of the sleeve 12 in the axial direction.

On the proximal end side and the distal end side of the housing 31,
A base end side oil chamber 36 and a distal end side chamber 37 are formed, respectively, and a base end side piston 32 and a distal end side piston 33 are provided in each of the oil chambers 36 and 37 so as to be slidable in the axial direction. The proximal piston 32 is movable toward and away from the distal end surface of the roll shaft 1 in the axial direction. Tie rod 34 is housing 3
1 and screwed onto the proximal piston 32, the distal piston 33 is externally fitted and the nut 38 is screwed. A spring 35 is interposed between the bottom surface of the tip side oil chamber 37 and the tip side piston 33.

A hydraulic device 39 supplies hydraulic oil to each oil chamber 36, 37, and includes a hydraulic pump 41 driven by a motor 40 or manually, a relief valve 42, a manual or electromagnetic 4-port 3-position switching valve 43, and the like.

The nut body 30 presses the pressing body 13 toward the roll 11, and is screwed onto the outer circumferential surface of the housing 31 so as to be movable forward and backward in the axial direction. The outer circumferential surface of the base end of the nut body 30 has a central angle 60 that protrudes outward in the radial direction.
Three protrusions 44 are formed at equal intervals in the circumferential direction,
It corresponds to each protrusion 18 of the pressing body 13 in the axial direction. Further, on the outer peripheral surface of the tip end side of the nut body 30, notches 45 for rotating the nut are formed at equal intervals in the circumferential direction.

Reference numeral 46 denotes a stopper, which is fitted onto the outer circumferential surface of the distal end of the equipment shaft 23 so as to be able to be screwed forward and backward in the axial direction.
It is releasably fixed by a lock bolt 47. The outer peripheral side of the base end surface of the stopper 46 is a stopper surface 48 that restricts movement of the housing 31 of the hydraulic cylinder 29 and the distal end side piston 33 in the axial direction toward the side opposite to the roll unit 10 side.
It faces the housing 31 and the distal end surface of the distal end side piston 33 in the axial direction.

Reference numeral 49 denotes a drawer body that pulls out the pressing body 13 and the sleeve 12 by the rotation of the nut body 30 and the operation of the hydraulic cylinder 29, and is externally fitted on both the pressing body 13 and the nut body 30 so as to be movable in the axial direction. ing. On the inner circumferential surface of the proximal end of the drawer body 49, a protrusion 50 with a center angle of 60 degrees that protrudes inward in the radial direction extends three times in the circumferential direction.
Although they are formed at equal intervals and correspond to each protrusion 18 of the pressing body 13 in the axial direction, the external fitting of the drawer body 13 is carried out as follows. That is, after fitting the drawer body 49 onto the nut body 30 and the pressing body 13 with the protrusion 50 positioned between the circumferentially adjacent protrusions 44 and 18, the drawer body 49 is rotated. Each projection 50 is made to correspond to each projection 18 in the axial direction. Engagement recesses 51 are formed at equal intervals in the circumferential direction on the distal end side of the drawer body 49.

Reference numeral 52 denotes a cover that is removably fitted onto the cylinder block 28, and its tip is fixed to the stopper 46 with bolts 53. The base of the cover 52 is externally fitted onto the nut body 30 so as to be relatively slidable in the axial direction, and at the base end, an engaging portion 54 that removably engages with the engaging recess 51 is equally spaced in the circumferential direction. The drawer body 49 cannot rotate relative to the cylinder block 28 and the roll unit 10.

Next, the roll unit 10 and cylinder block 28 are attached to the roll shaft 1 as shown in FIGS.
The explanation will be based on the drawings in the figures.

FIG. 8 shows the state of the roll unit 10 and cylinder block 28 before they are attached to the roll shaft 1.
The equipment shaft 23 is always provided on the roll shaft 1 side,
Further, the roll unit 1010 and the cylinder block 28 are constructed from each component.

When installing the roll unit 10 and cylinder block 28, first, manually
As shown in FIG. 9, the roll unit 10 is fitted onto the small diameter portion 7 of the roll shaft 1, pushed inward in the axial direction as far as possible, and the cylinder block 28
The stopper 46 is fitted onto the equipment shaft 23 and pushed as far inward as possible in the axial direction, and then the stopper 46 is attached and fixed. Note that the nut body 30 may be attached later.

In the state shown in FIG. 9, the elastic body 19 does not stretch, and the roll unit 10 and cylinder block are in a so-called free state.

Each gap in the axial direction in FIGS. 9 and 10 will be explained below.

δ ₁ : The gap between the sleeve 12 and the ring 14 before the sleeve 11 is pushed in, and is determined by the degree of taper of the inner peripheral surface of the sleeve 12 and the small diameter portion 7 of the roll shaft 1.

δ ₂ : indicates the gap after the sleeve 12 is pushed in with the force necessary for the transmission torque by the hydraulic cylinder 29, as shown in FIG. The amount by which the sleeve 12 is pushed by the hydraulic cylinder 29 is (δ ₁ −δ ₂ ). The necessary transmission torque from the roll shaft 1 to the roll 11 via the sleeve 12 is the force P1 generated by pushing the sleeve ₁₂ and the pressing body 13 that presses the roll 11 toward the base side of the roll shaft 1 in the axial direction. It is the sum of the forces resulting from the pressing force _P2 . By the way, the elastic body 19 is expanded by the operation of the hydraulic _cylinder 29, and the elastic force of the elastic body 19 generated by this becomes a pressing force _P2 , so that the force _P3 (hydraulic cylinder 29 Sleeve 1 by
If the pushing force P2) and the pushing force _P2 are made to have the same magnitude, the required predetermined transmission torque can be obtained by the hydraulic cylinder 29 and the hydraulic device 39 with the minimum capacity.

δ ₃ : A gap between the stepped surface of the inner peripheral surface of the pressing body 13 and the circumferential protrusion 15 of the sleeve 12, theoretically (δ ₁ −
δ ₂ ) It is good if there is roll shaft 1, sleeve 1
2. Due to processing fluctuations of the roll 11, etc., (δ ₁ −
(δ ₂ ) changes, so it is actually (δ ₁ +α)).

δ ₄ : Gap between the proximal end surface of the housing 31 and the distal end surface of the sleeve 12.

δ ₅ , δ ₆ : Each piston 32, 33 and each oil chamber 36, 3
7, the stroke of the hydraulic cylinder 29 is (δ ₅ +δ ₆ ).

δ ₇ , δ ₈ : Clearances between each piston 38, 39 and the tip of the roll shaft 1 or the stopper surface 48 of the stopper 46, which may be large enough to allow the cylinder block 28 to be assembled into the equipment shaft 23.

δ ₉ , δ ₁₀ : The gap between the protrusion 25 of the equipment shaft 23 and the proximal wall surface of the large diameter portion 9 or the retaining portion 9a, (δ ₉
+δ ₁₀ ) is the elongation margin of the elastic body 19, and (δ ₉ +δ ₁₀ ) is determined so that the tensile stress of the elastic body 19 is equal to or less than the allowable stress. Note that in the state shown in FIG. 9, δ ₉ is zero.

δ ₁₁ : Indicates screws and other plays.

When the hydraulic cylinder 29 is connected to the hydraulic device 39 and hydraulic oil is supplied to the tip side oil chamber 37, as shown in FIG.
7 is brought into contact with the stopper surface 48 of the stopper 46, the housing 31 slides on the equipment shaft 23 and the pistons 32, 33 in the axial direction and approaches the sleeve 12 side.

As a result, the elastic body 19 is expanded, the protrusion 25 of the equipment shaft 23 comes into contact with the retaining part 9a in the axial direction, δ ₁₀ becomes zero, and the equipment shaft 23 is moved relative to the roll shaft 1. It becomes a fixed state.

In this state, as the housing 31 further slides toward the sleeve 12, the sleeve 1
2 is pushed between the tapered portion 7a and the inner peripheral surface of the roll 11.

As described above, since the sleeve 12 is pushed directly by the housing 31 with the equipment shaft 23 fixed to the roll shaft 1, the sleeve 12 can be pushed into a predetermined position by one operation of the hydraulic cylinder 29. .

Thus, the sleeve 12 is moved by the hydraulic cylinder 29.
The pushing force _P3 is set to a predetermined value by adjusting the set pressure of the relief valve 42. It is desirable that the pushing force P ₃ is _a force equivalent to the elongation (δ ₉ + δ _{10 )} of the elastic body ₁₉ ; ), and if the force exceeds the corresponding force above, the integrated equipment shaft 2
3 and the roll shaft 1, there is no problem, and no severe tensile force is applied to the elastic body 19.

As described above, push the sleeve 11 and apply force.
After securing P ₁ , as shown in FIG. 12, a pressing force P ₂ is applied to the roll 11 by the nut body 30 via the pressing body 13 due to the elastic force of the elastic body 19.

First, as shown in FIG. 11, the switching valve 43 is operated to supply hydraulic oil to the base end side oil chamber 36, the base end side piston 32 is brought into contact with the front end surface of the roll shaft 1, and the housing 31 to the outside in the axial direction, the distal end surface of the housing 37 is brought into contact with the stopper surface 48 of the stopper 46, and the elastic body 19 is pulled with a force of P ₂ or more. δ ₉ +
δ ₁₀ ). In this state, there is a gap in the axial direction between the nut body 30 and the pressing body 13, and the nut body 30 is free. Next, a suitable tool is engaged with the notch 45, the nut body 30 is rotated, the nut body 30 and the pressing body 13 are brought into contact, and δ ₄ is made zero. Next, the switching valve 43
When the oil chambers 36 and 37 are placed in a neutral position, the insides of both oil chambers 36 and 37 are opened to the outside, and the hydraulic cylinder 29 is placed in an unlocked state as shown in FIG. 12, the elastic body 19 tends to contract, but the cylinder block 2
8 and the equipment shaft 23 extend in the axial direction from the roll shaft 1 through the pressing body 13, the roll 11, and the ring 14, so the elastic body 19 hardly or not shrinks at all. 19, the nut body 30 presses the pressing body 13, and the pressing body 13 presses the roll 11 toward the base of the roll shaft 1 with a pressing force of approximately _P2 .

Next, the hydraulic device 39 and the hydraulic cylinder 29 are separated, and the drawer body 49 and the cover 52 are provided, and the work of mounting the roll unit 10 and the cylinder block 28 on the roll shaft 1 is completed.

During operation, the roll unit 10, elastic body 19, equipment shaft 23, cylinder block 28, drawer body 46, cover 52, etc. rotate integrally with the roll shaft 1.

By the way, the protrusion 25 and the retaining part 9a engage with each other in the axial direction, and the locking member 26 prevents relative rotation between the equipment shaft 23 and the roll shaft 1, so that the engagement is not released. Therefore, even if the elastic body 19 is damaged for some reason during operation, the cylinder block 28 or roll unit 1 will be damaged.
There is no risk that the roller 0 will fly out to the outside in the axial direction of the roll shaft 1 together with the equipment shaft 23, and it is safe.

Next, the operation of removing the roll unit 10 and cylinder block 28 from the roll shaft 1 will be explained based on the drawings of FIGS. 13 to 15.

First, as shown in FIG. 13, the cover 52 is removed and the hydraulic device 39 and the hydraulic cylinder 29 are connected. Hydraulic oil is supplied to the base end side oil chamber 36, and the first
In the same state as in Figure 1, rotate the nut body 30,
The nut body 30 pulls the pressing body 13 outward in the axial direction via the pulling body 49 until the stepped surface of its inner peripheral surface contacts the circumferential protrusion 15 .

In the state shown in FIG. 13, the housing 31 is brought into contact with the stopper surface 48 of the stopper 46 in the axial direction, and the housing 31 cannot be moved to the side opposite to the roll unit 10 side.

Therefore, first, set the switching valve 43 to the neutral position,
After removing the hydraulic pressure from the hydraulic cylinder 29 and making the elastic body 19 its natural length, the protrusion 25 and the large diameter portion 9 of the equipment shaft 23 are connected.
and the proximal wall surface of the base end to make δ ₁₀ zero.

Next, loosen the lock bolt 47, pull out the stopper 46 by a predetermined amount from the equipment shaft 23 as shown in FIG. Provide a gap to allow movement to the opposite side.

In this state, with hydraulic oil supplied to the base end side oil chamber 36 and the base end side piston 32 in contact with the front end surface of the roll shaft 1, the housing 31 is moved to the side opposite to the roll unit 10 side. Move, Natsuto body 3
0, the sleeve 12 is pulled out in the axial direction outward through the drawer body 49 and the pressing body 13, and along with this drawing out, the roll 11 itself is also drawn out in the axial direction outward. The pulling force of this sleeve 12 is
Although it varies depending on the degree of taper of the tapered portion 7a and the inner circumferential surface of the sleeve 12, and the coefficient of friction between the tapered sleeve 12, the roll shaft 1, and the roll 11, the pushing force P ₃ is usually
Therefore, it can be easily pulled out using the hydraulic cylinder 29.

FIG. 15 shows a state in which the sleeve 12 has been completely pulled out. From this state, the stopper 46, cylinder block 28, and roll unit 10 can be removed from the equipment shaft 23 and roll shaft 1 in the reverse order of the assembly procedure.

When removing the cylinder block 28 and separating the joint 56, the hydraulic pressure of the hydraulic cylinder 29 is first released, and then the piston 33 between the tips is moved manually until it hits the spring 35. Push each piston 32, 33 of the hydraulic cylinder 29 into each oil chamber 36,
37 to a predetermined intermediate position in the axial direction, the joint 56 is removed and both pistons 32 and 33 are locked.

Therefore, as mentioned above, both pistons 32 and 33
If it is set to a desired intermediate position, the roll unit 10 and cylinder block 28 will be moved as shown in FIG.
When the stopper 46 is manually attached to the roll shaft 1, δ ₇ ≒ δ ₈ is satisfied.

If δ ₇ ≒ δ ₈ as described above, the workability during the mounting will be good.

(Effects of the invention) As described in detail above, the present invention uses a double-acting hydraulic cylinder, and makes the retaining part of the roll shaft and the equipment shaft come into contact with each other in the axial direction, so that the equipment shaft is aligned with the roll shaft. Since the sleeve is directly pushed in by the housing of the hydraulic cylinder in a fixed state, the sleeve can be pushed into a predetermined position with one operation of the hydraulic cylinder, and the roll unit can be easily installed. Furthermore, the elongation of the elastic body is restricted by the contact between the roll shaft retaining part and the equipment shaft in the axial direction, so severe tensile force is applied to the elastic body when the roll unit is attached to and detached from the roll. There isn't. Furthermore, the equipment shaft is prevented from coming off the roll shaft by the contact between the roll shaft retaining part and the equipment shaft in the axial direction, so even if the elastic body is damaged, the cylinder block, roll unit, or It is safe because the stopper etc. will not fly out in the axial direction of the roll shaft together with the equipment shaft. In addition, a stopper is screwed onto the outer circumferential surface of the distal end of the equipment shaft so that it can move forward and backward in the axial direction and is detachable, and a stopper is screwed onto the proximal end surface of the stopper.
Since it forms a stopper surface that restricts the movement of the housing and piston of the hydraulic cylinder in the axial direction to the side opposite to the lock unit side, the stroke amount of the hydraulic cylinder can be adjusted by screwing the stopper back and forth with respect to the equipped shaft. You can also do it. The present invention not only has the above-mentioned advantages, but also has a simple structure and great benefits.

[Brief explanation of the drawing]

1 to 15 show an embodiment of the present invention, FIG. 1 is a vertical sectional view, and each of FIGS. 2 to 6 is a line AA and B-B in FIG. 1. , C-C line, D
- D line, E-E line arrow sectional view, Fig. 7 is a diagram in which a hydraulic circuit is added to the F-F line arrow sectional view of Fig. 2,
8 to 15 are longitudinal sectional views for explaining the attachment and detachment of the roll unit, cylinder block, stopper, etc., and FIG. 16 is a longitudinal sectional view showing an example of the prior art. 1... Roll shaft, 9a... Retaining part, 10...
Roll unit, 11... Roll, 12... Taper sleeve, 13... Pressing body, 19... Elastic body,
23...Equipped shaft, 28...Cylinder block, 2
9... Hydraulic cylinder, 30... Nut body, 31...
...Housing, 32, 33... Proximal end side/distal end side piston, 39... Hydraulic system, 46... Stopper, 48... Stopper surface, 49... Drawer body.

Claims (1)

[Scope of utility model registration request] A roll unit 10 is removably fitted to the tip of the roll shaft 1, a roll 11 is fitted onto the outside of the roll shaft 1, and the roll unit 10 is taper-coupled to the roll shaft 1 so that the base portion is connected to the outer peripheral surface of the roll shaft 1 and the inner periphery of the roll 11. A tapered sleeve 12 is inserted into and removed between the surfaces, and a tapered sleeve 12 is fitted onto the tip of the sleeve 12 so that it cannot be pulled out to the side opposite to the roll 11 side, and the roll 11 is aligned with the roll axis in the axial direction. A pressing body 13 cooperates with the sleeve 12 to fix the roll 11 to the roll shaft 1 by pressing toward the base end of the roll shaft 1. An equipped shaft having an elastic body 19 fixed to the roll shaft 1, the base of which is fixed to the tip of the elastic body 19, and the tip side protrudes outward in the axial direction of the roll shaft 1. 23 is inserted so as to be movable in the axial direction and non-rotatable relative to each other, and in contact with the base of the equipment shaft 23 in the axial direction to the roll shaft 1, so that the elastic body 19 is extended beyond its natural length. The cylinder block 2 is provided with a retaining portion 9a that prevents the equipment shaft 23 from coming off the roll shaft 1, and the cylinder block 2 is provided at a midway point in the axial direction of the equipment shaft 23.
8 to the outside of the cylinder block 28 in a removable manner.
The housing 31 is fitted onto the equipment shaft 23 so as to be relatively movable in the axial direction and not relatively rotatable, and the housing 31 is fitted relative to the pistons 32, 33 and the equipment shaft 23 toward the roll unit 10 side. A double-acting hydraulic cylinder 29 moves in the axial direction to push the sleeve 12 in a state where the retaining portion 9a and the equipment shaft 23 are in contact with each other in the axial direction.
The housing 31 is screwed into the outer peripheral surface of the housing 31 so as to be freely retractable in the axial direction, and is pressed by the housing 31 of the hydraulic cylinder 29 due to the elastic force of the elastic body 19 during operation, thereby pressing the pressing body 13 toward the roll 11 side. A stopper 46 is screwed onto the outer circumferential surface of the distal end of the equipment shaft 23 so as to be movable back and forth in the axial direction and detachable. A stopper surface 48 that restricts movement of 32 and 33 in the axial direction to the side opposite to the roll unit 10 side.
, the nut body 30 and the pressing body 13 are moved to the side opposite to the roll unit 10 side, and the housing 3 of the hydraulic cylinder 29 is moved.
A drawer body 49 that pulls out the pressing body 13 and the sleeve 12 by moving in the axial direction relative to the opposite side with respect to the pistons 32, 33 and the equipment shaft 23 is releasably interlocked in the drawing direction. A roll mounting device for cantilever mills featuring: