JP2022148347A - roller screen - Google Patents

Abstract

To easily replace rollers in a roller screen.SOLUTION: Provided is a roller screen comprising a plurality of rollers 1 arranged in parallel, and a first support device 40 that supports one ends of the rollers 1 in an axial direction with a frame 6 and a second support device 50 that supports the other ends in the axial direction with the frame 6. In the roller screen, the roller 1 comprises a hollow cylindrical body 1b; the first support device 40 comprises a first support shaft 41 to be fixed to one end of the cylindrical body 1b in the axial direction via a first bolt 44 and a first bearing part 45 to be fixed to the frame 6 via a second bolt 46; the second support device 50 comprises a second support shaft 51 to be fixed to the other end of the cylindrical body 1b in the axial direction via a third bolt 54 and a second bearing part 55 that rotatably supports the second support shaft 51 with the frame 6; and the first support shaft 41 and the first bearing part 45 can be separated from the cylindrical body 1b and the frame 6 in a state of removing the first bolt 44 and the second bolt 46.SELECTED DRAWING: Figure 1

Description

The present invention relates to roller screens.

2. Description of the Related Art Roller screens have been conventionally used to classify materials such as earth and sand, crushed stones, ores, coke and other stone materials, as well as other various lumps and granular materials. The roller screen includes a plurality of rollers arranged side by side at predetermined intervals and rotated by a driving force. An object to be processed moves on the roller along the rotation direction of the roller. Objects smaller than the distance set between the rollers are sieved out from between the rollers, and objects larger than the distance set between the rollers pass over the rollers, enabling sieving according to the particle size.

Abrasion occurs on the surface of rollers used in roller screens when they come into contact with objects to be processed. Therefore, when the wear of the rollers reaches a limit on the sieving performance, the rollers need to be replaced. Since the rollers are usually made of highly wear-resistant material, frequent replacement of the rollers is costly. Therefore, for example, in Patent Document 1, the roller is configured by dividing the roller into a roll core and a cylindrical body made of a wear-resistant material fitted to the outer periphery of the roll core. Roller cost is reduced by limiting the use of expensive wear-resistant material to only the cylinders that come in contact with the workpiece. In addition, in Patent Document 2, the roller is a hollow cylindrical body, and the support shafts inserted at both ends of the hollow roller in the axial direction are detachable, so that the sprocket and the chain, which are the driving means for the roller, are attached to the device. Techniques have been disclosed that allow replacement of rollers without removing them from the main body.

Japanese Utility Model Publication No. 03-51016 JP-A-9-1073

In the roller screen of Patent Document 1, support shafts are integrally provided at both ends of the roller core in the axial direction. For this reason, when replacing the roller, the sprocket and chain fixed to the support shaft must be loosened or removed from the support shaft, the roller core body can be removed together with the cylindrical body from the main body of the apparatus, and then the cylindrical body and roller core body must be separated. must be separated. Furthermore, when a new roller is attached to the main body of the apparatus, the opposite operation occurs. Such work requires time and effort, and is extremely complicated because the roller core is heavy. Further, in the roller screen of Patent Document 2, it is necessary to separate the rollers and the support shafts in a state in which the rollers and the support shafts are detached from the device main body. Further, the rollers cannot be removed from the device main body unless the sprockets and chains fixed to the support shafts of the rollers are loosened or removed from the support shafts. Therefore, in Patent Document 2, the work is complicated as in Patent Document 1.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to facilitate replacement of rollers of a roller screen.

In order to solve the above problems, the present invention provides a plurality of rollers arranged in parallel, a first supporting device for supporting one axial end of the roller on a frame, and a second supporting device for supporting the other axial end on the frame. and a driving source for rotating the roller, wherein the roller has a hollow tubular body, and the first support device is attached to one axial end of the tubular body via a first bolt. A fixed first support shaft, and a first bearing fixed to the frame via a second bolt and rotatably supporting the first support shaft to the frame, the second support device comprising: a second support shaft fixed to the other end in the axial direction of the tubular body via a third bolt; and a second bearing portion rotatably supporting the second support shaft to the frame; A roller screen that can be separated from the cylindrical body and the frame with the first bolt and the second bolt removed is used for the shaft and the first bearing.

Here, a rotation transmission member that transmits rotation to the second support shaft of the other roller adjacent to the second support shaft is attached, and the cylindrical body is configured to be the above-mentioned roller with the third bolt removed. A configuration that can be separated from the second support shaft and the frame can be adopted.

Further, the first bolt and the third bolt may be screwed into the cylindrical body at axially outer sides of the mounting width of the object to be processed on the cylindrical body in the axial direction. can.

In each of these aspects, an input member to which driving force from the driving source is input is provided at one axial end of at least one of the plurality of rollers arranged in parallel, and the input member includes the first support shaft and the It is possible to employ a configuration in which the first bearing portion can be separated from the cylindrical body and the frame.

In order to solve the above problems, the present invention provides a plurality of rollers arranged in parallel, a first supporting device for supporting one axial end of the roller on a frame, and a second supporting device for supporting the other axial end on the frame. and a drive source for rotating the roller, wherein the roller has a hollow tubular body, and the first support device is provided at one axial end of the tubular body. a first support shaft fixed via a first bolt; and a first bearing portion fixed to the frame via a second bolt and rotatably supporting the first support shaft to the frame; 2. The support device includes a second support shaft fixed to the other axial end of the cylindrical body via a third bolt, and a second bearing portion rotatably supporting the second support shaft to the frame. In addition, a roller replacement method is adopted that includes a step of removing the first bolt and the second bolt, and a step of separating the first support shaft and the first bearing portion from the tubular body and the frame.

The present invention can facilitate replacement of the rollers of the roller screen.

1 is a plan view showing one embodiment of the present invention; Longitudinal sectional view of the same embodiment Right side view of Fig. 1 Disassembled enlarged cross-sectional view near the roller Longitudinal cross section of roller (a) is a plan view of the roller, (b) is a sectional view of (a) (a) is a front view of the roller, (b) is a sectional view of (a) Exploded view of the vicinity of the first support device Enlarged vertical cross-sectional view of main part of roller

An embodiment of the present invention will be described based on the drawings. This embodiment is a roller screen R used for classifying construction surplus soil and aggregate (crushed stone) as an object C to be treated, and a method for replacing rollers 1 in the roller screen R. . The configuration of a roller screen unit S having a roller screen R is shown in FIGS. 1 and 2. FIG.

The roller screen R includes a plurality of rollers 1 arranged side by side and rotated by a driving force from a driving source 5 . A frame 6 supporting the rollers 1 is supported by an underframe 8 placed on the ground G, one end of which can be raised and lowered by a lifting device 7, and the other end of which can be rotated by a fulcrum support portion 9 connected to a hinge. be. In the lifting device 7, a rod that expands and contracts by hydraulic operation is connected to one end of the frame 6, and when the rod expands, one end of the frame 6 rises, the elevation angle α with respect to the horizontal direction of the roller screen R increases, and the rod moves. If shortened, the elevation angle α becomes smaller. That is, the frame 6 supporting the roller 1 can be raised and lowered by the lifting device 7 . If the underframe 8 is mounted on the travel device, the device can be moved to any location.

A plurality of rollers 1 arranged in parallel are rotated in the same direction around the axis by the driving force supplied from the driving source 5, respectively. The drive source 5 in this embodiment is a motor 5a, and as shown in FIGS. 1 and 3, the rotation of the motor 5a is transmitted to the support shaft of the roller 1 via an input member 5b consisting of a pulley, a belt, or the like. It's like The rotation transmitted to the support shaft of one roller 1 is transmitted to the support shaft of another adjacent roller 1 via a rotation transmission member 5c provided on the opposite side of the input member 5b with the roller 1 therebetween. Further, the rotation of the other roller 1 to which the driving force is transmitted is also transmitted to the support shaft of the further roller 1 via the rotation transmission member 5c. A sprocket attached to the support shaft and a chain wound between the sprockets are used as the rotation transmission member 5c. The configurations of the input member 5b and the rotation transmission member 5c are not limited to those described above, and other means may be employed.

A predetermined gap (interval) is set between the adjacent rollers 1 , 1 . This gap is called a roller gap w. As shown in FIG. 7, the roller gap w is the shortest distance between the outer peripheries 1a between the adjacent rollers 1, 1. As shown in FIG. The roller gap w can be adjusted to any dimension. This adjustment can be performed by moving the fixing point of the support shaft to the frame 6 along the parallel direction of the rollers 1 . As a fixing structure for the support shaft of the roller 1 and the frame 6, for example, holes are provided intermittently at a predetermined pitch along the longitudinal direction in the frames 6 on both sides in the width direction of the roller, and the support shaft of the roller 1 is fixed. The roller gap w can be adjusted by inserting both ends into one set of holes and fixing the support shaft with a tightening means such as a nut. Alternatively, the frames 6 on both sides in the width direction of the roller are provided with long holes along the longitudinal direction, and while the both ends of the support shaft of the roller 1 are slid in the length direction of the long holes, the nut is installed at either position. The roller gap w can be adjusted by fixing the support shaft with a tightening means such as.

At one end of the rollers 1 in the parallel direction, a loading section 3 for the workpiece C is provided. The loading section 3 is a hopper installed above one end of the frame 6 . The object to be processed C dropped from the loading unit 3 moves on the roller 1 along the rotation direction of the roller 1 . Objects C with a diameter smaller than the roller gap w are sieved downward through the gap between the rollers 1, 1, while objects C with a diameter larger than the roller gap w pass over the roller 1 and reach the other end. . This enables sieving according to particle size. That is, setting the classification point of the roller screen R to t means that the objects to be processed C having an outer diameter equal to or greater than the classification point t (mm) are sent to the recovery unit 4, and the objects to be processed having an outer diameter less than the classification point t (mm) It means that it is desired to guide the product C to the sieving unit 2, respectively. Here, the place where the object C to be processed placed below the roller gap w (below the roller 1 group) falls is referred to as a sieving part 2, and the part to be processed C placed on the other end in the parallel direction of the rollers 1 is dropped. A drop point is called a collecting portion 4 . The small-diameter objects C to be processed that have fallen into the sieving section 2 are guided onto the sieving section transfer device 11 such as a belt conveyor through the guiding section 2a. The small-diameter material C to be processed is carried out to the next process by the sieving section transfer device 11 . Also, the large-diameter workpiece C that has fallen into the recovery section 4 is guided onto a recovery section transfer device 12 such as a belt conveyor through the guide section 4a. The large-diameter object C to be processed is carried out to the next process by the recovery unit transfer device 12 .

The roller screen unit S is controlled by the control device 30 in terms of its functions and general operations. Further, the rotational speed of the roller 1 (the number of revolutions per unit time (min ⁻¹ )) is controlled by a speed control section 31 provided in the control device 30 . Further, the sieving section transfer device 11 and the collection section transfer device 12 are controlled by a transfer device control section 33 . In addition, information necessary for the sieving process of the object C to be processed can be input to the setting unit 34 . Based on the information input to the setting unit 34, the control device 30 commands necessary operations. In this embodiment, as shown in FIG. 2, the main body of the roller screen R is set such that the parallel direction of the rollers 1 is inclined downward toward the feed direction of the object C to be processed. The elevation angle α of the inclination direction with respect to the horizontal direction can be appropriately changed according to the material, particle size distribution, and the like of the object C to be processed. This elevation angle α can be adjusted by controlling the lifting device 7 with the angle control section 32 provided in the control device 30 .

A structure for fixing the roller 1 to the frame 6 and a method for replacing the roller 1 will be described below.

As shown in FIGS. 3 and 4, the roller screen R includes a first supporting device 40 that supports one axial end of the roller 1 on the frame 6, and a second supporting device 40 that supports the other axial end of the roller 1 on the frame 6. A support device 50 is provided. Here, H-shaped steel is adopted as the frame 6 . The roller 1 includes a hollow cylindrical body 1b made of a steel pipe for general structure or machine structural use, and plate-shaped end members 1c fixed to both end faces of the cylindrical body 1b by welding or the like. . By configuring the roller 1 with the cylindrical body 1b, the weight of the member is reduced. Also, by using a wear-resistant material, the replacement frequency can be reduced.

As shown in FIG. 4, the first support device 40 is attached to the cylindrical body 1b via a first bolt 44 that is screwed into a screw hole 1d formed in an end face member 1c at one end in the axial direction of the cylindrical body 1b. A fixed first support shaft 41 and a first bearing portion 45 that is fixed to the frame 6 via a second bolt 46 and supports the first support shaft 41 rotatably with respect to the frame 6 . ing.

The first support shaft 41 is a support shaft that supports one axial end of the roller 1 on the frame 6 . In this embodiment, the outer circumference of the first support shaft 41 is provided with a flange 42 having a flange shape. The flange 42 is formed by cutting, welding, or the like. The first bolt 44 is inserted through a hole 43 formed in the flange 42, and its tip is screwed into the screw hole 1d. The end of the first support shaft 41 is fitted into the center hole 1e formed in the end member 1c, and the end member 1c and the flange 42 are brought into close contact with each other by tightening the first bolt 44, so that the cylinder is The shaped body 1b and the first support shaft 41 are firmly fixed. That is, by tightening and loosening the first bolt 44, the first support shaft 41 can be attached to and detached from the cylindrical body 1b. The first bearing portion 45 has a rolling bearing inside the casing, and has a flange portion 45b protruding outward along the outer edge of the casing. The second bolt 46 is inserted through a hole 45a formed in the flange portion 45b, a hole 47a formed in a reinforcing piece 47 fixed to the frame 6 by welding or the like, and a hole 6a formed in the frame 6. , and a nut 48 is tightened to its tip. By tightening the second bolt 46 and the nut 48 , the first support shaft 41 is fixed to the frame 6 together with the first bearing portion 45 . That is, by tightening and loosening the second bolt 46 and the nut 48, the first bearing portion 45 can be attached to and detached from the frame 6. As shown in FIG. Reference numeral 49 in the figure is a sealing device.

As shown in FIG. 4, the second support device 50 is attached to the cylindrical body 1b via a third bolt 54 that is screwed into a screw hole 1d formed in the end face member 1c at the other end in the axial direction of the cylindrical body 1b. and a second bearing portion 55 that is fixed to the frame 6 via a fourth bolt 56 and supports the second support shaft 51 to be rotatable about the axis with respect to the frame 6 . I have.

The second support shaft 51 is a support shaft that supports the other axial end of the roller 1 on the frame 6 . In this embodiment, the outer circumference of the second support shaft 51 is provided with a flange 52 having a flange shape. The flange is formed by cutting, welding, or the like. The third bolt 54 is inserted through a hole 53 formed in the flange 52, and its tip is screwed into the screw hole 1d. The end of the second support shaft 51 is fitted into the center hole 1e formed in the end member 1c, and the end member 1c and the flange 52 are brought into close contact with each other by tightening the third bolt 54, so that the cylinder is The shaped body 1b and the second support shaft 51 are firmly fixed. By tightening and loosening the third bolt 54, the second support shaft 51 can be attached to and detached from the cylindrical body 1b. The second bearing portion 55 has a rolling bearing inside the casing, and has a flange portion 55b protruding outward along the outer edge of the casing. The fourth bolt 56 is inserted through a hole 55a formed in the flange portion 55b, a hole 57a formed in a reinforcing piece 57 fixed to the frame 6 by welding or the like, and a hole 6a formed in the frame 6. , and a nut 58 is tightened to its tip. The second support shaft 51 is fixed to the frame 6 together with the second bearing portion 55 by tightening the fourth bolt 56 and the nut 58 . That is, by tightening and loosening the fourth bolt 56 and the nut 58, the second bearing portion 55 can be attached to and detached from the frame 6. As shown in FIG. Reference numeral 59 in the figure is a sealing device.

When the roller 1 is replaced with the apparatus main body, the used roller 1 fixed to the frame 6 is removed from the frame 6 and then a new roller 1 is attached to the frame 6 . When removing the roller 1, first, the first bolt 44 and the second bolt 46 are loosened and removed. Then, the first support shaft 41 and the first bearing portion 45 are separated from the tubular body 1b and the frame 6. As shown in FIG. In this manner, a roller replacement method including the step of removing the first bolt 44 and the second bolt 46 and the step of separating the first support shaft 41 and the first bearing portion 45 from the tubular body 1b and the frame 6 is adopted. By doing so, the separation of the first bearing portion 45 from the tubular body 1b and the frame 6 is facilitated. In particular, if the first support shaft 41 and the first bearing portion 45 are removed integrally from the frame 6 without being separated, the operation for mounting the roller 1, which will be described later, is facilitated.

Next, the third bolt 54 is loosened and removed. Then, the tubular body 1 b is separated from the second support shaft 51 and the frame 6 . Since the tubular body 1b can be removed from the second support shaft 51 and the frame 6 with the third bolt 54 removed, it is not necessary to remove the second support shaft 51 from the frame 6. That is, by adopting a roller replacement method including a step of removing the third bolt 54 and a step of separating the tubular body 1b from the second support shaft 51 and the second bearing portion 55, the frame of the tubular body 1b can be replaced. 6 is easy to separate. Further, since the second support shaft 51 is attached with the rotation transmission member 5c for transmitting the rotation to the other adjacent rollers 1, the roller can be rotated without removing the rotation transmission member 5c (sprocket, chain, etc.). 1 can be exchanged.

These first bolts 44 and third bolts 54 are axially outside the mounting width A (see FIG. 3) of the workpiece C on the cylindrical body 1b in the axial direction. Since the bolt is screwed into the cylindrical body 1b, it is possible to prevent the tightening and loosening of the bolt from being hindered due to the object to be processed C adhering to the vicinity of the screw hole 1d. In this embodiment, an end face member 1c having a screw hole 1d is positioned axially outside the pair of guide plates a, a that determine the mounting width A. As shown in FIG.

An input member 5b is attached to one axial end of the first support shaft 41 of some (at least one) roller 1 among the plurality of rollers 1 arranged in parallel. 3 shows a roller 1 with an input member 5b and FIGS. 4 and 6 show a roller 1 without an input member 5b. When removing the roller 1 having the input member 5b, the input member 5b can be separated from the cylindrical body 1b and the frame 6 together with the first support shaft 41 and the first bearing portion 45. FIG. If the input member 5b is removed integrally from the frame 6 without being separated from the first support shaft 41, the work for mounting the roller 1, which will be described later, is facilitated. In addition, it is preferable to remove an endless member (belt or the like) wound around a pulley or the like which is the input member 5b in advance.

Here, when the first support shaft 41 and the first bearing portion 45 (along with the input member 5b if provided) are removed from the frame 6, as shown in FIG. It is preferable that a predetermined space (space) is secured on the one end side. It is desirable that the space has a cross section through which the first bearing portion 45 and the input member 5b can pass. In this way, the first support shaft 41 can be easily removed from the device body together with the first bearing portion 45 in a state where the tip end of the first support shaft 41 is pulled out of the frame 6 .

Installation of the roller 1 is the reverse of the removal described above. That is, the third bolt 54 is tightened to fix the tubular body 1b of the new roller 1 to the second support shaft 51, and then the first bolt 44 and the second bolt 46 are tightened to tighten the tubular body 1b. A step of fixing the first support shaft 41 and the first bearing portion 45 is adopted.

In this embodiment, as shown in FIGS. 5B and 5C, the outer periphery 1a of the roller 1 is provided with a ridge 20 extending in the axial direction of the roller 1. As shown in FIG. As shown in FIG. 1, the ridge 20 has an axial range r of the ridge 20 of one roller 1 and an axial range r' of the ridge 20 of the other roller 1 adjacent thereto. set in different positions. That is, the axial ranges r, r' of the ridges 20 of the two adjacent rollers 1 are set so as not to overlap each other. In this embodiment, the ridges 20 are formed of weld beads, but other structures such as welding shaft-like members may be employed. By providing the ridges 20 on the surface of the roller 1, a large mass of the object C to be processed sandwiched between the rollers 1, 1 can be easily dropped downward. Here, it is expected that the ridge 20 not only pushes down the mass of the object C to be processed, but also crushes it by the compressive force, and furthermore, lifts the mass from below and conveys it to the rollers 1 downstream. ing. As a result, clogging of the workpiece C between the rollers 1, 1 can be eliminated. In addition, since the ridges 20 of the two adjacent rollers do not overlap in the axial direction of the roller 1, the classification accuracy is not lowered without narrowing the roller gap w.

Further, in this embodiment, as shown in FIG. 7, a scraper 10 is provided below the roller 1 so as to face the outer circumference 1a of the roller 1. As shown in FIG. The tip 10a of the scraper 10 may be in sliding contact with the outer circumference 1a of the roller 1, but in this embodiment, a predetermined gap v is set between the tip 10a of the scraper 10 and the outer circumference 1a of the roller 1. . By providing the scraper 10, it is possible to remove the object to be treated C, which has a lot of moisture and is highly adhesive, adhering to the outer circumference 1a of the roller 1. FIG. As a result, a predetermined roller gap w can be maintained, so that the sieving accuracy, that is, the classification accuracy described above is not degraded. In addition, since the scraper 10 is installed below the roller 1, it is possible to quickly drop the deposit scraped off from the outer circumference 1a of the roller 1 downward. The scraper 10 is a plate-like member, and as shown in FIG. 7, the plate surface direction B of the plate-like member is orthogonal to the parallel direction of the rollers 1 (the direction connecting the axial centers p of the roller groups) L. It may be in the direction to When the predetermined interval v is set, the dimension can be determined depending on how thick the deposit is allowed to adhere to the outer circumference 1a of the roller 1. FIG.

Moreover, as described above, in the roller screen R of the present invention, the rotation speed of the roller 1 can be adjusted by the control of the speed control section 31 . In this embodiment, the rotation speed of the roller 1 can be arbitrarily adjusted steplessly by inverter control. The elevation angle α of the roller screen R, that is, the elevation angle α of the frame 6 with respect to the horizontal direction can be adjusted by controlling the elevation device 7 with the angle control section 32 . This elevation angle α can also be adjusted steplessly. By increasing the rotational speed of the roller 1 (increasing the number of rotations per unit time), the object C to be processed is less likely to be caught. In addition, by decreasing the elevation angle α of the roller screen R (relieving the downward gradient in the movement direction of the object C to be processed), the sieving point of the object C to be processed, that is, the point at which the sieving is completed is moved upstream. can be pushed to the side.

The objects to be treated C handled by the roller screen R include, in addition to construction surplus soil exemplified in this embodiment, aggregate (crushed stone) used for concrete and other applications, for example, sand, ore, stone materials such as coke, Alternatively, various other lumps, granules, etc. can be employed.

1 Roller 1b Cylindrical body 5 Drive source 5b Input member 5c Rotation transmission member 6 Frame 40 First support device 41 First support shaft 44 First bolt 45 First bearing 46 Second bolt 50 Second support device 51 Second support Shaft 54 Third bolt 55 Second bearing A Mounting width C Workpiece R Roller screen S Roller screen unit

Claims (5)

A plurality of rollers (1) arranged in parallel, a first supporting device (40) supporting one axial end of the roller (1) on the frame (6), and a second supporting device (40) supporting the other axial end on the frame (6). A roller screen comprising a support device (50) and a drive source (5) for rotating the roller (1),
The roller (1) comprises a hollow tubular body (1b),
The first support device (40) includes a first support shaft (41) fixed to one axial end of the cylindrical body (1b) via a first bolt (44), and a first support shaft (41) attached to the frame (6). a first bearing portion (45) fixed via two bolts (46) and rotatably supporting the first support shaft (41) to the frame (6);
The second support device (50) includes a second support shaft (51) fixed to the other axial end of the cylindrical body (1b) via a third bolt (54), and the second support shaft ( 51) and a second bearing portion (55) that rotatably supports the frame (6),
The first support shaft (41) and the first bearing portion (45) are mounted on the cylindrical body (1b) and the frame (6) with the first bolt (44) and the second bolt (46) removed. ) is removable from the roller screen. A rotation transmission member (5c) for transmitting rotation to the second support shaft (51) of the other roller (1) adjacent to the second support shaft (51) is attached, and the cylindrical body (1b) is detachable from the second support shaft (51) and the frame (6) with the third bolt (54) removed. The first bolts (44) and the third bolts (54) are installed on the cylindrical body (1b) axially outside of the axial placement width (A) of the workpiece (1b). 3. A roller screen according to claim 1 or 2, which is screwed into 1b). An input member (5b) to which driving force from the driving source (5) is input is provided at one axial end of at least one of the plurality of rollers (1) arranged in parallel, and the input member (5b) 4. The roller screen according to any one of claims 1 to 3, wherein the roller screen is separable from the cylindrical body (1b) and the frame (6) together with the first support shaft (41) and the first bearing (45). . A plurality of rollers (1) arranged in parallel, a first supporting device (40) supporting one axial end of the roller (1) on the frame (6), and a second supporting device (40) supporting the other axial end on the frame (6). In a method for replacing the roller (1) in a roller screen comprising a support device (50) and a drive source (5) for rotating the roller (1),
The roller (1) comprises a hollow tubular body (1b),
The first support device (40) includes a first support shaft (41) fixed to one axial end of the cylindrical body (1b) via a first bolt (44), and a first support shaft (41) attached to the frame (6). a first bearing portion (45) fixed via two bolts (46) and rotatably supporting the first support shaft (41) to the frame (6);
The second support device (50) includes a second support shaft (51) fixed to the other axial end of the cylindrical body (1b) via a third bolt (54), and the second support shaft ( 51) and a second bearing portion (55) that rotatably supports the frame (6),
a step of removing the first bolt (44) and the second bolt (46); A roller replacement method including a step of separating from.

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