JPH0216163B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll mounting device for a cantilever mill, and an object thereof is to facilitate the installation and removal of a roll unit.

Cantilever mills are mainly used as block mills for finish rolling of steel bars and wire rods, and in these rolling mills, there is a tapered sleeve that is attached to the roll shaft in a manner that is immovable and removable, and a tapered sleeve that It consists of a roll fitted onto the base and a pusher fitted onto the tip of the tapered sleeve. By the way, when attaching and detaching the roll unit to and from the roll shaft in the past, a special jig must be used when attaching and detaching the taper sleeve, etc.
The reality is that it is not easy to attach and detach.

The present invention was invented in view of the above-mentioned circumstances, and its characteristics include a roll unit detachably fitted to a roll shaft, a tapered sleeve tapered to the tip of the roll shaft, and a tapered sleeve tapered to the tip of the roll shaft. Consisting of a roll fitted externally to the base of the sleeve and a pusher fitted externally to the tip of the sleeve in a manner that cannot be removed, the proximal end is fixed to the axial center of the roll shaft. An equipment shaft that is equipped with an elastic body, concentrically protrudes outward in the axial direction from the tip of the roll shaft, and whose base end is fixed to the tip of the elastic body is moved by a predetermined amount in the axial direction. In order to prevent relative rotation, a cylinder block is removably fitted to the tip of the equipment shaft.
The block is connected to a stopper fitted to an equipment shaft,
A double-acting hydraulic cylinder that is fitted onto the stopper so as to be slidable in the axial direction and whose housing pushes the sleeve by sliding relative to the stopper and the piston, and a pressing body that is screwed onto the outer peripheral surface of the housing so as to be movable in the axial direction. The nut and the pressing body are releasably interlocked in the extraction direction by a drawer body that pulls out the pressing body and the tapered sleeve by sliding the housing.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In FIGS. 1 and 11, 1 is a roll shaft;
A pair of upper and lower bearings are arranged inside the casing 2, and a pair of bearings 3,
4. It is rotatably supported via a cartridge 5. The base end of the roll shaft 1 is interlocked and connected to the spindle 6, and the distal end side of the roll shaft 1 has a small diameter portion 7 that is smaller in diameter than the midway portion in the axial direction. , the tapered portion 7a is 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, and the tip end side of the through hole 8 is a large diameter portion 9 having a larger diameter than the midway portion in the axial direction. As shown in FIG. 12, in the middle of the inner peripheral surface of the large diameter portion 9 in the axial direction, there is a protrusion 9b with a center angle of 60 degrees that protrudes radially inward three times in the circumferential direction.
They are formed at equal intervals, and the fitting portion 9a is located closer to the base than the protrusion 9b of the large diameter portion 9.

In FIG. 1, reference numeral 10 denotes a roll unit which is fitted onto the roll shaft 1 in a relatively unrotatable and removable manner, and is composed of a tapered sleeve 11, a roll 12, and a pressing body 13. The tapered sleeve 11 has an inner circumferential surface on the proximal side tapered toward the tip, forming a small diameter portion 7.
It is tapered coupled to the tapered portion 7a of the small diameter portion 7, and its distal end side is spline coupled to the splined portion 7b of the small diameter portion 7. A circumferential protrusion 14 is formed at the tip of the outer peripheral surface of the sleeve 11 . roll 12
rotates integrally with the roll shaft 1 through the sleeve 11 at the rolling pass line position, and is removably fitted to the tip of the sleeve 11. This is blocked by a fillet ring 15 that is removably fitted to the base of the small diameter portion 7. The outer circumferential surface of the roll 12 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 pressing body 13 presses the roll 12 inward in the axial direction,
It is removably fitted onto the distal end side of the sleeve 11 via a key 16 so as to be movable in the axial direction but not relatively rotatable. The base side of the inner circumferential surface of the pressing body 13 has a small diameter portion 17 that is smaller in diameter than the distal end side, and as the small diameter portion 17 engages with the circumferential protrusion 14, the pressing body 13 cannot be pulled out from the sleeve 11. Ru. As shown in FIG. 6, three projections 18 having a center angle of 60 degrees and projecting outward in the radial direction are formed at the tip of the outer peripheral surface of the pressing body 13 at equal intervals in the circumferential direction.

Reference numeral 19 in FIGS. 1 and 11 is an elastic body exemplified by a torsion bar, and the through hole 8 of the roll shaft 1
A tensioning nut 20 is screwed to the base end of the roll shaft 1, and a locking nut 21 screwed to the nut 20 is detachably attached to the base end of the roll shaft 1 with a bolt (not shown). It can be installed freely. If the thread pitch of each nut 20, 21 is made different, the loosening can be completely prevented. Further, the tip of the elastic body 19 is supported by the roll shaft 1 via a bush 22.

Reference numeral 23 in FIG. 1 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. 13th
As shown in Fig. 14 and Fig. 15, the equipment shaft 2
On the proximal end and distal end sides of No. 3, three proximal protrusions 25 and three distal protrusions 26 with a center angle of 60 degrees projecting outward in the radial direction are equally spaced in the circumferential direction. It is formed. Each of these proximal end side protrusions 25 is
As shown in FIGS. 1, 5, and 6, the fitting portion 9a
The above-mentioned fitting is performed in the following manner. That is, with each proximal end protrusion 25 positioned between adjacent protrusions 9b in the circumferential direction, the proximal end of the equipment shaft 23 is screwed to the distal end of the elastic body 19 that is released from being fixed to the roll shaft 1. However, after inserting into the large diameter portion 9, the equipment shaft 23 is rotated so that the base end side protrusion 25 corresponds to the protrusion 9b in the axial direction. The fitting part 9a 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 considered to be the elongation of the elastic body 19.

In FIGS. 1, 5, and 6, reference numeral 27 denotes a comb that is detachably interposed between the large diameter portion 9 and the base end of the equipment shaft 23, and has a protrusion with a central angle of 60 degrees that protrudes in the axial direction. Three piece parts 28 are formed at equal intervals in the circumferential direction, and each protruding piece part 28 is inserted between the circumferentially adjacent protruding part 9b and the proximal end side protruding part 25, so that the head of the kobuta 27 is inserted into the protruding part 9b. The base end portion of the equipment shaft 23 is thereby connected to the distal end portion of the roll shaft 1 in a relatively unrotatable manner.

Reference numeral 30 in FIG. 1 denotes a cylinder block which is non-rotatably and removably fitted on the distal end side of the equipment shaft 23, and is composed of a stopper 31, a double-acting hydraulic cylinder 32, a nut 33, and the like. stoppa 31
is externally fitted on the distal end of the equipment shaft 23, and the base and distal ends of the inner circumferential surface are marked with the marks shown in Figs. 2, 4, and 1.
As shown in FIGS. 6, 17, and 18, a proximal protrusion 34 and a distal protrusion 35 with a center angle of 60 degrees that protrude radially inward correspond to each other by 3 in the circumferential direction.
These two corresponding protrusions 3 are individually formed.
The distal end side protrusion 26 is fitted between the holes 4 and 35, and this fitting is carried out as follows. That is,
After fitting the stopper 31 onto the equipment shaft 23 with both protrusions 34 and 35 positioned between the circumferentially adjacent distal end side protrusions 26, the stopper 31
is rotated to fit the distal end side protrusion 26 between the protrusions 34 and 35. Further, the tip of the stopper 31 is formed into a large-diameter portion 36 having a large diameter.
Note that the distance between the protrusions 34 and 35 is greater than the length of the distal end protrusion 26 in the axial direction. As shown in FIGS. 1, 3, 7, 8, and 9, the hydraulic cylinder 32 is connected to the housing 3.
7, and proximal and distal side pistons 38 and 39
, a plurality of pistons 38 equally spaced in the circumferential direction, and both pistons 38,
It consists of tie rods 40 etc. which connect 39. The distal end side of the housing 37 is externally fitted onto the distal end side of the stopper 31 so as to be freely slidable in the axial direction, and the inner circumferential surface on the proximal end side is a small diameter portion 41 having a smaller diameter than the distal end side. is externally fitted to the middle part of the equipment shaft 23 so as to be freely movable in the axial direction, and the base end surface of the housing 37 can freely come into contact with and separate from the distal end surface of the sleeve 11 in the axial direction by moving in the axial direction. In addition, the stepped surface of the inner circumferential surface can move toward and away from the base end surface of the stopper 31 in the axial direction. As shown in FIGS. 4 and 10, the housing 37 is only prevented from rotating relative to the stopper 31 by a removable pin 42 and a bolt 43, and a bullet 44 wrapped around the bolt 43 is prevented from rotating relative to the stopper 31. It is urged toward the stopper 31 by. Small diameter part 41
The stopper 3 has three protrusions 45 having a center angle of 60 degrees that protrude inward in the radial direction and are equally spaced in the circumferential direction.
The housing 37 corresponds in the axial direction to each of the proximal protrusions 35 of 1, and is provided on the equipment shaft 23 in a state where it is integrated with the stopper 31. 1st
In Figures 2, 4, 46 is a kotsuta which is detachably interposed between the equipment shaft 23, the stopper 31 and the housing 37, and is a protruding piece with a central angle of 60 degrees that protrudes in the axial direction. Three portions 47 are formed at equal intervals in the circumferential direction, and each protrusion portion 47 is inserted between circumferentially adjacent protrusions 26, 34, 35, and 45, so that the head of the stopper 46 is connected to the large diameter portion of the stopper 31. 36 with bolts 48, the stopper 31 and the housing 37 cannot rotate relative to the equipment shaft 23. A proximal oil chamber 49 and a distal oil chamber 50 are formed on the proximal and distal sides of the housing 37, respectively, and the proximal piston 38 and A tip side piston 39 is provided so as to be slidable in the axial direction, and both pistons 38 and 39 are connected by a tie rod 40. The side pistons 39 are movable toward and away from the large diameter portion 36 of the stopper 31 in the axial direction. As shown in FIG. 8, the tie rod 40 is inserted into the housing 37 and screwed onto the proximal piston 38, and then the distal piston 39 is fitted onto the outside and the nut 51 is screwed onto it. 52 is a spring washer for preventing loosening. In FIGS. 7 and 9, 53 and 54 are supply pipes for supplying hydraulic oil to the respective oil chambers 49 and 50.
are provided with joint male parts 55a and 56a. The tip of the supply pipe 53 is the proximal piston 38
and 〓 are opposite to each other via λ. 57 is a sealing material. In Fig. 19, 58 indicates each oil chamber 49, 5.
A hydraulic device that supplies hydraulic oil to the motor 59.
Alternatively, it consists of a manually driven hydraulic pump 60, a relief valve 61, a manual or electromagnetic 4-port 3-position switching valve 62, joint female parts 55b, 56b which are detachably connected to the respective male parts 55a, 56a, etc. , each male part 55a, 56a and female part 55b, 5
6b constitute self-seal type quick-fitting and detachable pipe joints 55 and 56. Figures 1 and 7
The nut 33 on the outer periphery of the hydraulic cylinder 32 in FIGS.
2 in the axial direction, and the housing 37
It is screwed onto the outer peripheral surface so that it can move forward and backward in the axial direction.
On the outer circumferential surface of the base end of the nut 33, three protrusions 63 with a center angle of 60 degrees that protrude outward in the radial direction are formed at equal intervals in the circumferential direction. We are responding to the following. Further, as shown in FIG. 3, notches 64 for rotating the nut are formed at equal intervals in the circumferential direction on the outer peripheral surface of the tip end side of the nut 33.

Reference numeral 65 in FIG. 1 is a drawer body, and the pressing body 1 is pulled out by the rotation of the nut 33 and the operation of the hydraulic cylinder 32.
3 and the sleeve 11, and the pressing body 13
and the nut 33 so as to be movable in the axial direction. On the inner peripheral surface of the proximal end of the drawer body 65,
As shown in FIG. 6, three protrusions 66 with a center angle of 60 degrees that protrude inward in the radial direction are equally spaced in the circumferential direction and correspond to each protrusion 18 of the pressing body 13 in the axial direction. However, the external fitting of the drawer body 65 is performed as follows. That is, after fitting the drawer body 65 onto the nut 33 and the pressing body 13 with the protrusion 66 positioned between the circumferentially adjacent protrusions 63 and 18, the drawer body 65 is rotated and each The protrusion 66 is made to correspond to each protrusion 18 in the axial direction. Engagement recesses 67 are formed at equal intervals in the circumferential direction on the tip end side of the drawer body 65.

Reference numeral 68 in FIG. 1 denotes a cover that is removably fitted onto the cylinder block 30, and its tip end is fixed to the bolt 46 with bolts 69. The base of the cover 68 is externally fitted onto the nut 33 in a relative sliding manner in the axial direction, and the base end is provided with an engaging recess 6.
Engagement portions 70 that removably engage with the cylinder block 7 are formed equidistantly in the circumferential direction, and the drawer body 65 engages with the cylinder block 30.
and cannot rotate relative to the roll unit 10.

Next, the roll unit 10 and cylinder block 30 are attached to the roll shaft 1 as shown in FIGS.
This will be explained based on the drawing in FIG.

FIG. 22 shows the state of the roll unit 10 and cylinder block 30 before they are attached to the roll shaft 1. The equipped shaft 23 is always provided on the roll shaft 1 side, and the roll unit 10 and cylinder block 30 are attached to each configuration. It is composed of members.

When installing the roll unit 10 and cylinder block 30, first, manually
As shown in FIG. 23 and the upper half of FIG.
The cylinder block 30 is also fitted onto the equipment shaft 23,
Push it as far inward in the axial direction as possible, and then attach and fix the clasp 46. Note that the nut 33 may be attached later.

In the state shown in Fig. 23 and the upper half of Fig. 1,
The elastic body 19 does not stretch, and the roll unit 10 and cylinder block 30 are in a so-called free state.

Each gap in the axial direction in FIGS. 23 and 24 will be explained below.

δ ₁ : The gap between the sleeve 11 and the ring 15 before the sleeve 11 is pushed in, and is determined by the degree of taper of the inner peripheral surface of the sleeve 11 and the small diameter portion 7 of the roll shaft 1.

δ ₂ : As shown in FIG. 24, this indicates the gap after the sleeve 11 is pushed in by the hydraulic cylinder 32 with a force necessary for the transmission torque. The amount by which the sleeve 11 is pushed by the hydraulic cylinder 32 is (δ ₁ −δ ₂ ). Roll 1 from roll shaft 1 via sleeve 11
The required transmission torque to the roll 12 is the sum of the force P ₁ generated by pushing the sleeve 11 and the force P ₂ generated by the pressing body 13 pressing the roll 12 inward in the axial direction. In the operating state, the pressing force P ₂ is constantly applied to the roll 12 as the output of the hydraulic cylinder 32, so the force P ₁
By making the force P ₃ (the pushing force of the sleeve 11 by the hydraulic cylinder 32) and the pushing force P ₂ equal to each other, the necessary predetermined transmission torque can be transferred to the hydraulic cylinder 32 with the minimum capacity and the hydraulic pressure. It can be obtained by the device 58.

δ ₃ : A gap between the stepped surface of the inner peripheral surface of the pressing body 13 and the circumferential protrusion 14 of the sleeve 11, theoretically (δ ₁ −
δ ₂ ) It is good if there is roll shaft 1, sleeve 1
1. Due to processing fluctuations of roll 12, etc., (δ ₁ − δ ₂ )
changes, so it is actually (δ ₁ +α).

δ ₄ : A gap between the pressing body 13 and the base end of the housing 37, which may be about δ ₃ .

δ ₅ : Among δ ₄ , this is the gap corresponding to the tip of the pressing body 13 to the tip of the sleeve 11.

δ ₆ : Within δ ₄ , from the tip of sleeve 11 to housing 3
This is a gap corresponding to up to 7 base ends.

δ ₇ , δ ₈ : Each piston 38, 39 and each oil chamber 49, 5
0 and the bottom surface, (δ ₇ +δ ₈ ) is the stroke of the hydraulic cylinder 32.

δ ₉ : Stepped surface on the inner peripheral surface of the housing 37 and the stopper 3
The gap between the sleeve 11 and the base end is zero when assembled as shown in FIG. 23, and is the same as the amount of movement of the housing 37 when the sleeve 11 is pushed in.

δ ₁₀ : This is the gap between the tip of the housing 37 and the large diameter portion 36 of the stopper 31. It may be zero, but in consideration of machining accuracy, it should be set to a size equivalent to the machining error.

δ ₁₁ , δ ₁₂ : Each piston 38, 39 and roll shaft 1
The gap between the tip or the large diameter portion 36 of the stopper 31 may be large enough to allow the cylinder block 30 to be assembled into the equipment shaft 23.

δ ₁₃ , δ ₄ : proximal end side protrusion 25 of the equipment shaft 23;
(δ ₁₃ + δ ₁₄ ) is the elongation margin of the elastic body 19 in the gap between the base end wall surface of the large diameter portion 9 or the projection 9b, and (δ ₁₃ +δ ₁₄ ) is determined. Furthermore, the second
In the state shown in Figure 3, δ ₁₃ is zero, and when assembled, δ ₁₄
becomes zero.

After connecting the hydraulic cylinder 32 to the hydraulic device 58, the switching valve 62 is switched to the state shown in FIG. 21 to supply hydraulic oil to the tip side oil chamber 50.
As shown in FIG. 24, the distal end side piston 39 comes into contact with the large diameter portion 36 of the stopper 31, thereby expanding the elastic body 19 and causing the housing 37 to
moves inward in the axial direction and pushes the sleeve 11 inward in the axial direction.

In this case, for example, if the pushing is done indirectly, such as by generating stress in the elastic body using a hydraulic cylinder and pushing the sleeve in with this stress, the stress in the elastic body and the pushing force of the sleeve are balanced. Because the sleeve stops pushing, it is necessary to operate the hydraulic cylinder several times to push the sleeve into position.

However, in the embodiment, the base end protrusion 25 of the equipment shaft 23 with the stopper 31 in a substantially fixed state comes into contact with the protrusion 9b, δ ₁₄ becomes zero, and the stopper 31 is in a fixed state on the roll shaft 1. In this state, the tip end side piston 38 comes into contact with the large diameter part 36 of the stopper 31, and the housing 37 directly pushes the sleeve 11 inward in the axial direction, so that one part of the hydraulic cylinder 32 The sleeve 11 can be pushed into a predetermined position by repeating the operation.

Thus, the sleeve 11 is moved by the hydraulic cylinder 32.
The pushing force _P3 is set to a predetermined value by adjusting the set pressure of the relief valve 61. It is preferable that the pushing force P ₃ is a force equivalent to the elongation (δ ₁₃ + δ ₁₄ ) of the elastic body 19, but even if the pushing force P ₃ is equal to or greater than the above-mentioned equivalent force, the elastic body 19 will be a force equivalent to (δ ₁₃ + δ _{14 )} . ), 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 P ₁ is secured, a pressing force P ₂ is applied to the roll 12 by the nut 33 via the pressing body 13, as shown in FIG.

That is, with the switching valve 62 in the state shown in FIG. 20, hydraulic oil is supplied to the base end side oil chamber 49, the base end side piston 38 is brought into contact with the tip of the roll shaft 1, and the housing 37 is moved in the axial direction. The elastic body 19 is moved outward so that the stepped surface of the inner peripheral surface of the housing 37 comes into contact with the base end of the stopper 31, and the elastic body 19 is extended by (δ ₁₃ +δ ₁₄ ). In this state, there is a gap in the axial direction between the nut 33 and the pressing body 13, and the nut 33 is free. Next, a suitable tool is engaged with the notch 64 to rotate the nut 33, and the nut 33 applies a pressing force P ₂ inward in the axial direction to the roll 12 via the pressing body 13. next,
The hydraulic device 58 and the hydraulic cylinder 32 are separated.
During this separation, if the insides of both oil chambers 49 and 50 are opened to the outside and the hydraulic cylinder 32 is unlocked, the elastic body 19 tries to contract, but the cylinder block 30 and equipment shaft 23 are Through the body 13, the roll 12 and the ring 15,
Since the elastic body 19 is stretched in the axial direction with respect to the roll shaft 1, the elastic body 19 hardly or not shrinks at all. Therefore, even if the hydraulic cylinder 32 is in the unlocked state as described above, the elastic force of the elastic body 19 will not cause any pressure. The pressing force P ₂ of the roll 12 by the body 13 is substantially ensured.

Incidentally, if the male parts 55a, 56a and the female parts 55b, 56b of the pipe joints 55, 56 are provided with check valves as shown in FIG. 19, the male parts 55a, 56a
This is convenient because when the female parts 55b and 56b are separated, the hydraulic oil does not scatter and remains in the respective oil chambers 49 and 50.

Next, as shown in FIG. 26 and the lower half of FIG. 1, once the drawer body 65 and cover 68 are provided, the work of mounting the roll unit 10 and cylinder block 30 onto the roll shaft 1 is completed.

During operation, the roll unit 10, elastic body 19, equipment shaft 23, cylinder block 30, drawer body 65, cover 68, etc. rotate integrally with the roll shaft 1.

By the way, the base end protrusion 25 and the protrusion 9b engage with each other in the axial direction, and the relative rotation between the equipment shaft 23 and the roll shaft 1 is prevented by the handle 27, so that the engagement is released. Because it never happens,
Even if the elastic body 19 is damaged for some reason during operation, etc., there is no risk that the cylinder block 30 and roll unit 10 will fly out along with the equipment shaft 23 to the outside in the axial direction of the roll shaft 1. It is safe.

Next, the operation of removing the roll unit 10 and cylinder block 30 from the roll shaft 1 will be explained based on the drawings of FIGS. 27 to 31.

First, as shown in FIG. 27, the cover 68 is removed and the hydraulic device 58 and the hydraulic cylinder 32 are connected. Hydraulic oil is supplied to the base end side oil chamber 49, and the second
5, rotate the nut 33, and push the pressing body 1 through the drawer body 65.
3 is pulled outward in the axial direction until the stepped surface of the inner peripheral surface contacts the circumferential protrusion 14.

In the state shown in FIG. 28, the stepped surface of the inner peripheral surface of the housing 37 is in contact with the base end of the stopper 31 in the axial direction, and the housing 37 cannot be moved outward in the axial direction. Therefore, the 28th
As shown in the figure, hydraulic oil is supplied to the tip side oil chamber 50, the tip side piston 39 is brought into contact with the large diameter portion 36 of the stopper 31, and the housing 37 is moved inward in the axial direction. . As a result, the elastic body 19
elongation is eliminated, δ ₁₃ becomes zero, and a return allowance for the housing 37 can be secured between the stepped surface of the inner circumferential surface of the housing 37 and the base end of the stopper 31, and the protrusion 63 of the nut 33 and the drawer body A gap is created between the tip portions 65 in the axial direction.

Next, as shown in FIG. 29, the nut 33 is pulled outward in the axial direction, and the projection 63 of the nut 33 and the tip of the pull-out body 65 are engaged.

After that, as shown in FIG. 30, hydraulic oil is supplied to the base end side oil chamber 49, and the base end side piston 38
is in contact with the tip of the roll shaft 1, and the housing 37
is moved outward in the axial direction, and the sleeve 11 is pulled out in the axial direction via the nut 33, the drawer body 65, and the pressing body 13. Along with this drawing, the roll 12 itself is also moved in the axial direction. pulled outward. The pulling force of this sleeve 11 is
The force for pulling out the sleeve 11 is determined by the degree of taper of the inner peripheral surface of the sleeve 11, and the force for pulling out the sleeve 11 varies depending on the angle of the taper and the coefficient of friction between the tapered sleeve 11, the roll shaft 1, and the roll 12, but it is usually determined by the pushing force _P3 . Since it is less than 90%, the hydraulic cylinder 32
It can be easily pulled out.

FIG. 31 shows a state in which the sleeve 11 has been completely pulled out. From this state, the cylinder block 30 and roll unit 10 can be removed from the equipment shaft 23 and roll shaft 1 in the reverse order of the assembly procedure.

As described in detail above, according to the present invention, there is no need for a special jig or the like when attaching and detaching the roll unit and cylinder block, and the housing of the double-acting hydraulic cylinder provided in the cylinder block is used as an actuator to push in and remove the sleeve. Since it is designed to be pulled out, the roll unit can be easily attached and detached, and the operation during attachment and detachment is also extremely easy.Furthermore, since the sleeve is pushed directly into the housing, the sleeve can be pushed in only once using a hydraulic cylinder. This can be done by operating. In addition, since the equipment shaft on which the cylinder block is attached is movable by a predetermined amount in the axial direction, the elastic body will not stretch beyond a certain amount, and severe tensile force will not be applied to the elastic body. Even if the elastic body is damaged for some reason during operation, there is no fear that the cylinder block or roll unit will fly out along with the equipment shaft, improving safety. The present invention has the various advantages mentioned above and is of great practical benefit.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a view taken along arrow A in FIG. 1, and each of the figures from FIGS. B line, C-C line, D
- D line, E-E line arrow sectional views, Figures 7 to 9
Each figure in the figure is the F-F line, the G-G line, and the H-H line in Figure 3.
10 is a sectional view taken along line J-J in FIG. 4, FIG. 11 is a vertical sectional view of the roll shaft, FIG. Figure 13 is a side view of the equipment shaft, and each figure in Figures 14 and 15 is a side view of the equipment shaft.
Figure 16 is a longitudinal sectional view of the stopper, Figures 17 and 18 are views taken in the direction of N and Q in Figure 16, and Figure 19 is a hydraulic circuit. Figure, 2nd
0 and 21 are explanatory diagrams showing the operating state of the switching valve, and each of FIGS. 22 to 31 is a longitudinal sectional view for explaining the attachment and detachment of the roll unit and cylinder block. 1...Roll axis, 10...Roll unit, 1
1... Taper sleeve, 12... Roll, 13...
... Pressing body, 19 ... Elastic body, 23 ... Equipment shaft, 2
7, 46...Cotter, 30...Cylinder block, 31...Stopper, 32...Double acting hydraulic cylinder, 33...Nut, 37...Housing, 3
8, 39... Proximal end side/distal end side piston, 40
... Tie rod, 58 ... Hydraulic system, 65 ... Drawer body, 68 ... Cover.

Claims (1)

[Claims] 1. A roll unit removably fitted to a roll shaft is connected to a tapered sleeve tapered to the tip of the roll shaft, a roll externally fitted to the base of the sleeve, and a roll unit detachably fitted to the tip of the sleeve. It consists of a push-in body fitted into the roll shaft, an elastic body whose proximal end is fixed to the roll shaft, and an elastic body that extends concentrically outward in the axial direction at the tip of the roll shaft. The equipment shaft, which has a protruding shape and whose base end is fixed to the tip of the elastic body, is movable by a predetermined amount in the axial direction and is not relatively rotatable, and a cylinder block can be freely attached and detached from the end of the equipment shaft. A double-acting hydraulic cylinder that is fitted onto the outside of the stopper so as to be slidable in the axial direction, and whose housing pushes the sleeve by sliding against the stopper and the piston. and a pressing body that is screwed into the outer peripheral surface of the housing so as to be freely reciprocated in the axial direction and presses the roll via the pressing body, and the nut and the pressing body are connected by sliding of the housing to the pressing body and the taper sleeve. A roll mounting device for a cantilever mill, characterized in that the roll mounting device for a cantilever mill is releasably interlocked in the drawing direction by a drawer body.