Roller screen

Abstract

To facilitate adjustment of an inter-roller gap in a roller screen.SOLUTION: A roller screen includes: a frame 2; a plurality of rollers 10 arranged in parallel along one direction of the frame 2; a support device 20 for supporting the roller 10 to the frame 2 so as to be freely rotatable; guide means for guiding the support device 20 along the one direction so as to be freely slidable; positioning means for positioning the support device 20 to a predetermined position relative to the one direction; and fixing means for fixing the support device 20 to the predetermined position.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a roller screen. [Background technology]

[0002] Roller screens have traditionally been used to classify materials to be processed, such as soil and sand, crushed stone, ore, coke, and other stone materials, as well as various other lumps and particles. A roller screen has multiple rollers that rotate by a driving force, arranged in parallel at a predetermined interval. The materials to be processed move on the rollers in the direction in which the rollers are aligned. Materials smaller than the set gap between the rollers are sieved out, while larger materials pass through the rollers, allowing them to be sieved according to particle size.

[0003] The gap between adjacent rollers in a roller screen (hereinafter referred to as the "roller gap") is adjusted as appropriate depending on the type of material being treated and the particle size to be screened. There are two main methods for adjusting the roller gap in the past. The first method involves adjusting the roller position (roller gap) based on the positions of multiple roller bearing mounting holes pre-installed in the frame. The second method involves preparing multiple rollers of different diameters and adjusting the roller gap by replacing the rollers.

[0004] However, in the first method, the adjustment range depends on the position of the roller bearing mounting hole, and in the second method, the adjustment range depends on the type of roller available. As a result, both methods have the problem of limited variation in the roller gap that can be adjusted.

[0005] Therefore, for example, in Patent Document 1, both ends of each roller are rotatably supported by bearings, and the bearings are fixed to a frame via elongated holes, thereby enabling the roller gap to be continuously adjusted. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP-A-6-170337 (see specification paragraph 0015, etc.) Summary of the Invention [Problem to be solved by the invention]

[0007] Although the roller screen in Patent Document 1 allows for stepless adjustment of the roller gap, each roller must be positioned individually in a predetermined position and then fixed to the frame, which poses the problem of the time and effort required for adjusting the roller gap.

[0008] SUMMARY OF THE INVENTION An object of the present invention is to facilitate adjustment of the roller gap in a roller screen. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides: The frame and a plurality of rollers arranged in parallel along one direction of the frame; a support device that rotatably supports the roller on the frame; a guide means for guiding the support device so that the support device is slidable along the one direction; a positioning means for positioning the support device at a predetermined position in the one direction; and a fixing means for fixing the support device at the predetermined position (Configuration 1).

[0010] In configuration 1, The guide means may be a slot provided in the frame in one direction, or a shaft provided along the frame in one direction (Configuration 2).

[0011] In the configuration 1 or 2, The fixing means may include a bolt, and the guide means may be an elongated hole in the frame, through which the bolt is inserted, and which extends in the one direction (Configuration 3).

[0012] In any one of configurations 1 to 3, The positioning means is a first positioning member having a plurality of protrusions along the one direction, and a configuration can be adopted in which the protrusions position the support devices by entering between adjacent support devices in the one direction (configuration 4).

[0013] In configuration 4, The first positioning member may be connected in the one direction by a connecting member (Configuration 5).

[0014] In configuration 3, The positioning means may be a second positioning member having a plurality of screw holes along the one direction, and the bolts may be screwed into the screw holes to position the support device (Configuration 6).

[0015] In configuration 3, the positioning means is a second positioning member having a plurality of through holes along the one direction, and a configuration can be adopted in which the bolt is screwed into the screw hole provided in the support device to position the support device (configuration 7).

[0016] In configuration 3, the positioning means may be a second positioning member having a plurality of through holes along the one direction, and the bolt may be screwed into a nut to position the support device (configuration 8).

[0017] In any one of configurations 1 to 8, The positioning means may be a block-shaped third positioning member, and the third positioning member may be disposed between the support devices adjacent to each other in the one direction to position the support devices (Configuration 9).

[0018] In any one of configurations 1 to 8, The positioning means is a fourth positioning member having a screw shaft and a nut, and a configuration can be adopted in which the nut screwed onto the screw shaft abuts against the support device to position the support device (Configuration 10).

[0019] A roller gap adjusting method using the roller screen according to any one of configurations 1 to 10, comprising: The guide means slides the support device along the one direction relative to the frame, The positioning means positions the support device at a predetermined position in the one direction; The fixing means may be configured to fix the support device at the predetermined position (Configuration 11). [Effects of the Invention]

[0020] According to the present invention, the roller gap in the roller screen can be easily adjusted. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is an overall view showing an embodiment of the present invention. [Figure 2] II-II cross section of Figure 1 [Figure 3] FIG. 1 is an enlarged front view of a main part of a first embodiment; [Figure 4] IV-IV cross section of Figure 3 [Figure 5] FIG. 10 is an enlarged front view of a main part of a second embodiment; [Figure 6] FIG. 6 is an exploded perspective view showing the positioning member and the connecting member of FIG. 5. [Figure 7] Cross section of Figure 5 taken along the line VII-VII [Figure 8] 10 is an enlarged front view of a main part of a third embodiment; [Figure 9] Enlarged view of the main part of Figure 8 [Figure 10] XX cross section of Figure 9 [Figure 11] XI-XI cross section of Figure 9 [Figure 12] FIG. 10 is an enlarged front view of a main part of a fourth embodiment. [Figure 13] XIII-XIII cross section of Figure 12 [Figure 14] FIG. 10 is an enlarged front view of a main part of a fifth embodiment. [Figure 15] XV-XV cross section of Figure 14 [Figure 16] FIG. 10 is an enlarged front view of a main part of a sixth embodiment. [Figure 17] FIG. 13 is an enlarged front view of a main part of a seventh embodiment. [Figure 18] FIG. 13 is an enlarged front view of a main part of an eighth embodiment. [Figure 19] FIG. 13 is an enlarged front view of a main part of a ninth embodiment. [Figure 20] FIG. 10 is a cross-sectional view showing a tenth embodiment. [Figure 21] Longitudinal cross section of Figure 20 [Figure 22] FIG. 22 is a perspective view showing the positioning member and the bolts and nuts of FIGS. 20 and 21. DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the present invention will be described with reference to the drawings. This embodiment relates to a roller screen 1 used to classify material A, such as construction waste soil or aggregate (crushed stone), and a method for adjusting the spacing (position adjustment method) of rollers 10 in the roller screen 1. The configuration of a roller screen unit equipped with the roller screen 1 is shown in Figs. 1 and 2.

[0023] The roller screen 1 includes multiple rollers 10 arranged in parallel, each of which rotates due to a driving force from a driving source 7. A frame 2 supporting the rollers 10 is supported by an underframe placed on the ground. The multiple parallel rollers 10 are each rotated in the same direction around their axes by the driving force. In this embodiment, the driving source 7 is a motor, and as shown in FIG. 2, the rotation of the motor is transmitted to the shafts 11 of the rollers 10 via input members such as pulleys and belts. The rotation transmitted to the shaft 11 of one roller 10 is transmitted to the shaft 11 of another adjacent roller 10 via a rotation transmission member provided on the opposite side of the roller 10 from the input member. The rotation of the other roller 10 to which the driving force has been transmitted is further transmitted to the shaft 11 of the other roller 10 via the same rotation transmission member. The configuration of the input member and rotation transmission member is not limited to the above, and other means may be used.

[0024] A predetermined gap (interval) is set between adjacent rollers 10, 10. This gap is referred to as the roller gap w. As shown in FIG. 1, the roller gap w is the shortest distance between the outer peripheries of adjacent rollers 10, 10 at the closest point. Hereinafter, the conveying direction of the workpiece A will be referred to as the parallel direction of the rollers 10 or simply as the parallel direction, and the width direction of the roller screen 1 will be referred to as the axial direction of the rollers 10 or simply as the axial direction.

[0025] An input section 8 for the material A to be treated is provided at one end of the rollers 10 in the parallel direction. The input section 8 is a hopper installed above one end of the frame 2. The material A to be treated that drops from the input section 8 moves on the rollers 10 in the parallel direction of the rollers 10. Material A to be treated that has a diameter smaller than the roller gap w passes between the rollers 10 and is sieved downward, while material A that has a diameter larger than the roller gap w passes over the rollers 10 and reaches the other end. This enables sieving according to particle size. In other words, setting the classification point of the roller screen 1 to t means that material A with an outer diameter equal to or greater than the classification point t (mm) is desired to be guided to the collection section 3 at the other end, and material A with an outer diameter less than the classification point t (mm) is desired to be guided to the sieving section 4 below. Small-diameter objects A that have fallen into the sieving section 4 are guided onto a sieving section transfer device 6, such as a belt conveyor, and transported to the next process. Large-diameter objects A that have fallen into the recovery section 3 are transported to another process by a recovery section transfer device 5.

[0026] The rotation speed of the roller 10 (number of rotations per unit time (min -1 )), the inclination angle of the roller screen 1, the operation of the sieving section transport device 4 and the recovery section transport device 5, and the like are all controlled by a control device (not shown).

[0027] The roller 10 is formed of a hollow cylindrical body 12 made of a steel pipe for general construction or machine construction, and a shaft 11 is connected to each end of the cylindrical body 12 in the axial direction.

[0028] The shaft 11 is formed by a shaft portion 21 of a support device 20 fixed to the frame 2. The support device 20 has a main body 23 incorporating a bearing device that rotatably supports the shaft portion 21, and a flange 25 that protrudes radially outward from the main body 23. The shaft portion 21 protrudes from the main body 23, and the end of the protruding side is fixed to the cylindrical body 12 via an end plate 22. The support device 20 is fixed to the frame 2 by fixing means 80, 90 such as bolts 81, 91. By fixing the support device 20 to the frame 2, the roller 10, together with the shaft portion 21 (shaft 11), is rotatably supported on the frame 2 (see, for example, the embodiment in Figures 3 and 4).

[0029] 3 and subsequent embodiments, bolts 81, 91 are used as fixing means 80, 90 for fixing the support device 20 to the frame 2, but other means such as fixing with a pin, tightening with a clamp, or key fixing may also be used. Also, in the embodiments, an H-shaped steel having an upper flange 2u, a lower flange 2d, and a web 2w is used as the frame 2, but this may also be configured with a member having a different cross-sectional shape.

[0030] In this invention, the roller gap w can be adjusted to any dimension depending on the type of material to be treated and the particle size to be sieved. To make the roller gap w adjustable, that is, to enable the rollers 10 to be fixed at any position, the roller screen 1, which includes the frame 2, multiple rollers 10, and support devices 20, is equipped with three means: guide means that guides the support devices 20 so that they can slide along the parallel direction of the rollers 10 (hereinafter referred to as one direction in the embodiments), positioning means that positions the support devices 20 at a predetermined position in the one direction, and fixing means that fixes the support devices 20 at a predetermined position.

[0031] (First embodiment) The main part of the first embodiment is shown in FIGS.

[0032] In the first embodiment, the guide means employs a long hole 2b provided in one direction in the frame 2. The roller 10 and the support device 20 are fixed together, and the support device 20 fits into the long hole 2b and is slidable along one direction. In FIG. 4, the shaft portion 21 fits into the long hole 2b, but the main body portion 23 may also fit into the long hole 2b.

[0033] The positioning means is composed of a first positioning member 30 having a longitudinal base 31 extending in one direction and a plurality of protrusions 32 arranged along that direction. The protrusions 32 fit between adjacent support devices 20 in one direction, thereby positioning the support devices 20. A plurality of first positioning members 30 with different distances between adjacent protrusions 32 are prepared, and the corresponding first positioning member 30 is attached according to the desired roller gap w. The roller gap w that can be set may be, for example, 50 mm, 75 mm, 100 mm, etc.

[0034] Here, the first positioning member 30 may be fixed to the frame 2 by an appropriate means such as a bolt, but the support device 20 may be fixed to the frame by a fixing means so that adjacent support devices 20, 20 in one direction are tightly fixed (contacted with pressure) between them. Furthermore, after the support device 20 is fixed to the frame 2 by the fixing means, the first positioning member 30 may be made removable from the frame 2.

[0035] In this embodiment, the distance between side edges 23a (side edges of the main body 23) of the support member 20 gradually narrows downward, and the bottom 23b connecting the side edges 23a is arc-shaped. Accordingly, the shape of the first positioning member 30 also gradually narrows downward between the facing side surfaces 33 of adjacent protrusions 32, matching the side edges 23a of the support device 20, and the bottom surface 34 connecting the side surfaces 33 is arc-shaped matching the bottom 23b. Therefore, the side edges 23a of the support device 20 and the side surfaces 33 of the first positioning member 30, and the bottom 23b of the support device 20 and the bottom surface 34 of the first positioning member 30 are in close surface contact with each other, ensuring accurate positioning of the support device 20.

[0036] Additionally, bolts 81 and nuts 82 are used as fixing means. With the support device 20 already positioned, the bolts 81 are inserted into the holes 24 formed in the flanges 25 and the nuts 82 are tightened, thereby fixing the support device 20 so that it does not move relative to the frame 2. Note that if the nuts 82 are loosened from the bolts 81, the support device 20 can move in one direction relative to the frame 2 even with the bolts 81 still inserted. At this time, the elongated holes 2a through which the bolts 81 are inserted also function as guide means.

[0037] In the first embodiment, two elongated holes 2a are provided and the support device 20 is fixed to the frame 2 with two bolts 81, but the positions and number of the elongated holes 2a and the positions and number of fixing points by the fixing means 80 are not limited. For example, one point or three or more points are also acceptable. Also, while FIG. 3 shows a roughly diamond-shaped support device 20 (flange 25), the shape of the outer edge of the support device 20 is not particularly limited. Also, the flange 25 may be a plate-shaped member as in the embodiment, or a block-shaped member having a certain thickness.

[0038] In the embodiment, an H-shaped steel beam is used as the frame 2, and the long holes 2a, 2b are provided in the web 2w. However, other embodiments are also conceivable, for example, in which the long holes 2a, 2b are provided in the lower flange 2d or the upper flange 2u. The positions of the long holes 2a, 2b can be set appropriately depending on the shape of the frame 2, and the positions and number of the long holes 2a, 2b and the positions and number of fixing points by the fixing means 80 can also be set freely. Furthermore, a covering may be installed to block the gaps in the long holes 2a, 2b other than the portion where the support device 20 is located, to prevent the workpiece A from leaking out. This also applies to each embodiment described below.

[0039] Second Embodiment The main parts of the second embodiment are shown in Figures 5 to 7. The main configuration is the same as in the first embodiment, so the following description will focus on the differences from the first embodiment (the same applies to each embodiment described below).

[0040] In the second embodiment, as shown in Fig. 5, a plurality of first positioning members 30 are connected in one direction by connecting members 35. The length of the roller screen 1 in one direction varies depending on the application and specifications of the device, so by connecting a plurality of first positioning members 30, it becomes possible to accommodate roller screens 1 of any length.

[0041] The first positioning members 30 have the same configuration as in the first embodiment, but the number of support devices 20 corresponding to one member is set to be relatively small. The first positioning members 30 in this embodiment have two concave bottom surfaces 34, which correspond to two support devices 20. For example, if a roller screen 1 uses twenty rollers 10, ten first positioning members 30 are used, connected by connecting members 35. If multiple types of first positioning members 30 each corresponding to a different number of support devices 20 are prepared, the variety of roller screens 1 that can be used will be wider.

[0042] The connecting member 35 of the embodiment is configured with a plate 35a having at least two holes 35c through which bolts 35d can be inserted. The first positioning members 30, 30 are connected to each other by inserting the bolts 35d into the holes 35c of the connecting member 35 and screwing each bolt 35d into the bolt holes 35b of the adjacent first positioning members 30.

[0043] 5, the support device 20 shown on the far right side of the drawing is not movable relative to the frame 2 but is fixed in position, but such a support device 20 at the end in one direction may be made position adjustable in one direction like the other support devices 20. This is also the case in the first embodiment described above.

[0044] (Third embodiment) The main part of the third embodiment is shown in FIGS.

[0045] The positioning means of the third embodiment employs a second positioning member 40 having a plurality of screw holes (mounting holes) 42a arranged along one direction. The screw holes 42a are formed with female threads. The support device 20 is positioned in one direction relative to the frame 2 by threading the bolts 81 of the fixing means 80 into the screw holes 42a. The use of the second positioning member 40 not only simplifies the positioning of the roller 10 but also improves the fastening force, which is effective in preventing the roller 10 from shifting position and suppressing vibration.

[0046] In this embodiment, the second positioning member 40 is configured as two positioning plates 41, 42 that sandwich the frame 2 from the inside (the side with the rollers 10) and the outside (the side without the rollers 10). The outer positioning plate 41 has through holes 41a formed at a distance corresponding to the roller gap w, and the inner positioning plate 42 has threaded holes 42a formed at a distance corresponding to the roller gap w. Bolts 81 are inserted into the through holes 41a, pass through the elongated holes 2a in the frame 2, and are screwed into the threaded holes 42a. Positioning plates 41, 42 are not necessarily required on both the inside and outside; an embodiment in which only the inside or outside is provided may also be used. For example, if only the outer positioning plate 41 is used, nuts 82 may be used on the inside of the bolts 81.

[0047] (Fourth embodiment) The main part of the fourth embodiment is shown in FIGS.

[0048] The positioning means of the fourth embodiment uses a block-shaped third positioning member 50. The third positioning member 50 is disposed between adjacent support devices 20, 20 in one direction, thereby positioning the support device 20 in one direction. When disposing the third positioning member 50, the support devices 20 and the third positioning members 50 are lined up alternately in one direction, and the support device 20 is fixed to the frame 2 by the fixing means 80 at an appropriate timing. The third positioning member 50 is sandwiched between the support devices 20, 20 and will not fall off.

[0049] 12 and 13, the third positioning member 50 is configured by two blocks 51, 52 that sandwich the frame 2 from the inside and outside, thereby more reliably positioning the support device 20. In addition, in the embodiment, the engaging protrusions 51a, 52a provided on each block 51, 52 are meshed with each other within the elongated hole 2b to form a single unit, but the blocks 51, 52 may also be connected to each other by a bolt or the like that passes through the elongated hole 2b. Note that the third positioning member 50 does not need to be divided into two members, and may instead be configured as a single member that is placed on the inside or outside of the frame 2.

[0050] Although the third positioning member 50 is shaped like a rectangular parallelepiped here, the shape thereof is free as long as it has a horizontal dimension corresponding to the desired roller gap w.

[0051] Fifth Embodiment The main part of the fifth embodiment is shown in FIGS.

[0052] The positioning means of the fifth embodiment uses a block-shaped third positioning member 60, as in the fourth embodiment. The third positioning member 60 is disposed between adjacent support devices 20, 20 in one direction, thereby positioning the support device 20 in one direction. When disposing the third positioning member 60, the support devices 20 and the third positioning member 60 are lined up alternately in one direction, and the support device 20 is fixed to the frame 2 by the fixing means 90 at an appropriate timing. The third positioning member 60 is sandwiched between the support devices 20, 20 and will not fall off.

[0053] Here, the third positioning member 60 is disposed outside the frame 2. A bolt 91 and a screw hole 92 provided in the support device 20 are used as the fixing means 90. With the support member 20 already positioned, the bolt 91 is inserted into an elongated hole 2c formed in the frame 2 and screwed into the screw hole 92 of the support device 20 (main body 23), thereby fixing the support device 20 so that it does not move relative to the frame 2. Note that if the bolt 91 is loosened, the support device 20 can move in one direction relative to the frame 2 even with the bolt 91 still inserted. At this time, the elongated hole 2c through which the bolt 91 is inserted also functions as a guide means, as in the above-described embodiment.

[0054] In this embodiment, the elongated holes 2c are provided in the lower flange 2d of the frame 2. However, it is also possible to provide the elongated holes 2c in the web 2w or the upper flange 2u. The positions and number of the elongated holes 2c and the positions and number of the fixing points using the fixing means 90 can be freely set. In this embodiment, the elongated holes 2b (the elongated holes 2b through which the shafts 11 of the rollers 10 are inserted), the upper flange 2u, and the web 2w of the frame 2 can be omitted. Therefore, members other than H-shaped steel may be used for the frame 2. For example, the frame 2 may be a plate-like member having only a member corresponding to the lower flange 2d. In this configuration, the rollers 10 and the support device 20 can be attached to and detached from the frame 2 without being separated from each other. This also applies to the sixth to ninth embodiments described below.

[0055] (Sixth embodiment) The main part of the sixth embodiment is shown in FIG.

[0056] The guide means of the sixth embodiment is composed of a shaft 2s provided in one direction along the frame 2. An end of the shaft 2s is fixed to the frame 2. A through-hole 28 is provided in the support device 20 in one direction, and the shaft 2s is inserted through this through-hole 28. This allows the support device 20 to be supported so as to be slidable in one direction along the shaft 2s.

[0057] The positioning means of the sixth embodiment, similar to the third embodiment, employs a second positioning member 100 having a plurality of through holes 102 extending in one direction. Here, the second positioning member 100 is configured as a positioning plate 101 provided below the frame 2. Furthermore, the fixing means 90 employs a bolt 91 and a screw hole 92 provided in the support device 20. The screw hole 92 has a female thread. The bolt 91 of the fixing means 90 passes through the through hole 102 of the second positioning member 100 and the elongated hole 2c of the frame 2, and then screws into the screw hole 92, thereby positioning the support device 20 in one direction relative to the frame 2 and fixing the support device 20 so that it does not move relative to the frame 2. Similar to the previous embodiments, if the bolt 91 is loosened, the support device 20 can move in one direction relative to the frame 2 even with the bolt 91 still inserted.

[0058] In Fig. 16, the main body 23 of the support device 20 is divided into two parts along one direction to sandwich the shaft 11 (shaft part 21), but a non-divided support device 20 as shown in Fig. 14 etc. may also be used. The number of shafts 2s as guide means is free, and an embodiment having two or more shafts 2s may also be used. The guide means is not limited to the long holes 2a, 2b, 2c and shafts 2s shown in the above embodiments, but may also be in the form of a rail using, for example, ridges or grooves.

[0059] Seventh Embodiment The essential parts of the seventh embodiment are shown in FIG.

[0060] The positioning means of the seventh embodiment is composed of a fourth positioning member 70 including a threaded shaft 71 provided along the frame 2 and a nut 72 threaded onto the threaded shaft 71. The end of the threaded shaft 71 is fixed to the frame 2. The support device 20 is provided with a through-hole 28 in one direction, through which the threaded shaft 71 is inserted. This allows the support device 20 to be supported so that it can slide in one direction along the threaded shaft 71. Furthermore, the nut 72 threaded onto the threaded shaft 71 abuts against the end face 23b of the support device 20, thereby positioning the support device 20. When assembling these components, the support device 20 and the two nuts 72 are attached alternately to the threaded shaft 71 (see FIG. 17 ). The nuts 72 of the fourth positioning member 70 tighten the support device 20 from both sides in one direction, thereby also functioning as a fixing means for fixing the support device 20 to the frame 2 so that it does not move.

[0061] The method of fixing the support device 20 with the fourth positioning member 70 may be, for example, a lock ring or a snap ring, in addition to the nut 72 shown as an example. The number and position of the screw shaft 71 can be changed as appropriate. The screw shaft 71 in the embodiment is a round bar with a male thread, but if the nut 72 is not used, the screw shaft 71 may be a round bar or square bar with no thread.

[0062] Eighth Embodiment The essential parts of the eighth embodiment are shown in FIG.

[0063] In the eighth embodiment, the third positioning member 60 of the fifth embodiment is added to the fourth positioning member 70 of the seventh embodiment. The third positioning member 60 is disposed between adjacent support devices 20, 20 in one direction, thereby positioning the support device 20 in one direction. A screw shaft 71 is inserted into a unidirectional through-hole 28 provided in the third positioning member 60. When disposing the third positioning member 60, the support devices 20 and the third positioning members 60 are alternately arranged while the screw shafts 71 are inserted, and the parallel support devices 20 and third positioning members 60 are then fastened with nuts 72 from both sides in one direction to fix the support device 20 to the frame 2.

[0064] Ninth embodiment The essential parts of the ninth embodiment are shown in FIG.

[0065] In the ninth embodiment, the fourth positioning member 70 of the eighth embodiment is configured with two screw shafts 71. The other configurations are the same as those of the eighth embodiment, so a description thereof will be omitted.

[0066] The roller screen according to any of these embodiments can be used to employ the following roller gap adjustment method. That is, the guide means slides the support device 20 in one direction relative to the frame 2, the positioning means positions the support device 20 at a predetermined position in that direction, and the fixing means fixes the support device 20 at the predetermined position. By employing this roller gap adjustment method, it becomes easy to adjust the roller gap w in the roller screen 1.

[0067] Tenth Embodiment The main part of the tenth embodiment is shown in FIGS.

[0068] The positioning means of the tenth embodiment employs a positioning plate 112 having a plurality of through holes 112a, instead of the positioning plate 42 having the screw holes 42a of the third embodiment, and a second positioning member 110 having a nut 113 that is screwed onto the fixing bolt 81.

[0069] In this embodiment, the second positioning member 110 includes two positioning plates 111, 112 that sandwich the frame 2 on the inside (the side where the rollers 10 are present) and the outside (the side where the rollers 10 are not present). The outer positioning plate 111 has through holes 111a formed at a distance corresponding to the roller gap w, and the inner positioning plate 112 has through holes 112a formed at a distance corresponding to the roller gap w. The bolt 81 is inserted into the through hole 112a, passes through the elongated hole 2a of the frame 2 and the through hole 111a, and is fixed by screwing a nut 113 onto the tip of the bolt.

[0070] The positioning plates 111, 112 are not necessarily required on both the inner and outer sides, and may be arranged on only one of the inner and outer sides. For example, the outer positioning plate 111 may be omitted. In this case, a washer may be arranged in the position where the outer positioning plate 111 was located. Conversely, the inner positioning plate 112 may be omitted. In this case, a washer may be arranged in the position where the inner positioning plate 112 was located.

[0071] By tightening the nuts 113 onto the bolts 81 , the support device 20 is positioned in one direction relative to the frame 2 , and the support device 20 is fixed so as not to move relative to the frame 2 .

[0072] The inner diameter of the through holes 111a, 112a is formed slightly larger than the outer diameter of the shaft portion of the bolt 81 so that the shaft portion can pass through smoothly. This is the same in the other embodiments.

[0073] The fastening structure using the single nut 113 instead of the fastening structure using the screw hole 42a (embedded nut) of the third embodiment has the following advantages.

[0074] That is, in the positioning plate 42 of the third embodiment, it is necessary to align the bolt 81 with the multiple screw holes 42a (embedded nuts) provided along the longitudinal direction, but with a single nut 113 as in this tenth embodiment, it is only necessary to provide the through hole 112a in the positioning plate 112, and there is no need to provide a screw hole (female thread). This makes it easy to align the bolt 81 with the positioning plate 112. It also eliminates the need to repair the screw holes 42a (embedded nuts) over time.

[0075] When fixing the support device 20 for the roller 10 of a roller screen to the frame 2 using a conventional fastening structure using bolts and nuts, the nuts may loosen during operation of the roller screen, causing the roller to become loose. It has been confirmed that this problem cannot be completely solved even by adding a spring washer to the nut. This may require periodic retightening.

[0076] However, in this embodiment, a Hard Lock Nut (registered trademark), which is a nut with a loosening prevention function, is used as the nut 113. It was confirmed that when a Hard Lock Nut is used, the nut 113 does not loosen even after the roller screen has been used for an extended period of time.

[0077] The Hard Lock nut used in this embodiment is composed of a first nut 113a and a second nut 113b, with a convex portion formed on the first nut 113a facing the second nut 113b and a concave portion formed on the second nut 113b facing the first nut 113a. The eccentric fit between the convex portion and the concave portion generates a binding force around the axis on the first nut 113a and the second nut 113b, providing a strong anti-loosening function. In contrast, a spring washer only applies a pressing force in the axial direction to the nut 113 and is unable to provide such a binding force around the axis. In addition to Hard Lock nuts, other nuts with a locking function that can be used here include nuts coated with a locking adhesive such as Nord-Lock Washer (registered trademark) or Loctite (registered trademark).

[0078] In the embodiment, the bolt 81 is inserted from the inside of the frame 2 (left side / roller side in Figure 20) to the outside (right side in Figure 20), but the insertion direction of the bolt 81 is not limited, and for example, it may be inserted from the outside to the inside.

[0079] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0080] 1 Roller Screen 2 frames 2a,2b,2c long hole 10. Laura 11 axes 20 Support device 30 First positioning member 32 protrusion 35 Connecting member 40, 100, 110 Second positioning member 42a,102 screw holes 50, 60 Third positioning member 70 Fourth positioning member 71 Screw shaft 72 Nut 80,90 Fixing means 81,91 volts

Claims

1. Frame (2), A plurality of rollers (10) arranged in parallel along one direction of the frame (2); a support device (20) for rotatably supporting the roller (10) on the frame (2); a guide means for guiding the support device (20) so that the support device (20) can slide along the one direction; a positioning means for positioning the support device (20) at a predetermined position in the one direction; and fixing means for fixing the support device (20) in the predetermined position.

2. 2. The roller screen according to claim 1, wherein the guide means is a long hole (2b) in one direction provided in the frame (2) or a shaft (2s) in one direction provided along the frame (2).

3. 2. The roller screen according to claim 1, wherein the fixing means comprises a bolt (81, 91), and the guide means is the elongated hole (2a, 2c) in one direction provided in the frame (2) and through which the bolt (81, 91) is inserted.

4. 2. The roller screen according to claim 1, wherein the positioning means is a first positioning member (30) having a plurality of protrusions (32) along the one direction, and the protrusions (32) position the support devices (20) by getting between the support devices (20, 20) adjacent to each other in the one direction.

5. 5. The roller screen according to claim 4, wherein the first positioning member (30) is connected in the one direction by a connecting member (35).

6. The roller screen according to claim 3, wherein the positioning means is a second positioning member (40) having a plurality of screw holes (42a) along the one direction, and the bolts (81) are screwed into the screw holes (42a) to position the support device (20).

7. 4. The roller screen according to claim 3, wherein the positioning means is a second positioning member (100) having a plurality of through holes (102) along the one direction, and the bolts (91) are screwed into the screw holes (92) provided in the support device (20) to position the support device (20).

8. The roller screen according to claim 3, wherein the positioning means is a second positioning member (110) having a plurality of through holes (112a) along the one direction, and the bolt (81) is screwed into a nut (113) to position the support device (20).

9. 2. The roller screen according to claim 1, wherein the positioning means is a block-shaped third positioning member (50, 60), and the third positioning member (50, 60) is positioned between the support devices (20, 20) adjacent to each other in the one direction, thereby positioning the support devices (20).

10. 2. The roller screen according to claim 1, wherein the positioning means is a fourth positioning member (70) provided with a threaded shaft (71) and a nut (72), and the nut (72) screwed onto the threaded shaft (71) abuts against the support device (20), thereby positioning the support device (20).

11. A roller gap adjusting method using the roller screen according to any one of claims 1 to 10, comprising: The guide means slides the support device (20) along the one direction relative to the frame (2); The positioning means positions the support device (20) at a predetermined position in the one direction, The roller gap adjusting method includes fixing the support device (20) at the predetermined position by the fixing means.

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