JP7560438B2 - Drum Rod Screen - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. Sales date: September 6, 2021. Seller: Kobukuro Techno Co., Ltd. Address: 958-23 Ariyasu, Iizuka City, Fukuoka Prefecture Seller: Ikeda Kaihatsu Co., Ltd. Address: 1133 Kami-Odono, Isahaya City, Nagasaki Prefecture

The present invention relates to a drum rod screen suitable for screening high moisture and high viscosity raw materials that have soil, mud, and other contaminants.

Conventionally, a rotary screening device known as a drum rod screen has a structure in which a pair of annular bearing frames are arranged on a common cylindrical central axis, and each annular bearing frame is connected to the other by a plurality of square rods (rotating rods) around the common cylindrical central axis to form a cylindrical (drum-shaped) screen. On the other hand, a pair of rotating rollers, one each at the front and rear, that can correspond to the outer periphery of the annular bearing frames are supported on a base frame. The outer periphery of each of the annular bearing frames at the front and rear of the cylindrical screen is placed on each of the rotating rollers at the front and rear. The drive shaft of a drive motor installed on the base frame is connected to the drive shaft of the rotating rollers, and the drive motor is driven to rotate the rotating rollers, thereby rotating the cylindrical (drum-shaped) screen in one direction around the common cylindrical central axis (see Patent Document 1).

JP 2011-5474 A

The cylindrical screen was constructed by connecting the above-mentioned bearing annular frames with multiple so-called square rods (rotating rods, for example, with a square cross section). However, because square pipes (with a square cross section) were inserted around the outer periphery of the above-mentioned square rods, the weight of the square rods and square pipes increased (since multiple square rods were used, the overall weight increased considerably). In addition, when a through-hole frame was provided between the above-mentioned bearing annular frames and the square rods were inserted into the rotation holes of the through-hole frame, raw materials (for example, stones, etc.) became caught in the square rods and the rotation holes, hindering the rotation (self-spinning) of the square rods themselves.

In addition, if the square rods themselves do not rotate, the viscous raw material will settle in the cylindrical (drum-shaped) screen as pseudo-lumps (mud balls), reducing the screening efficiency.

The present invention was made in consideration of the above-mentioned problems with the conventional technology. All of the rods that make up the drum rod screen are round bars, and hollow covering tubes (with a square cross section) are inserted into the round bars. This not only reduces the weight, but also makes the outer hollow covering tube easier to rotate. As a result, viscous materials are less likely to settle inside the drum rod screen, and there is no decrease in screening efficiency.

In addition, a square ring-shaped member is attached to the hollow covering tube, making it possible to peel off and crush the raw material.

In addition, the corners of the hollow coated tube are more likely to come into contact with the cleaner plate, allowing the hollow coated tube to rotate more easily, which is expected to have a cleaner effect.

In order to achieve the above object, the present invention provides
First, a pair of bearing annular frames are disposed on both sides on a common central axis of the cylinder, an insertion annular frame is provided in the middle, a plurality of fixing holes are provided in the circumferential direction of each of the bearing annular frames and the insertion annular frame, and a plurality of fixing rods are fixedly provided in each of the fixing holes to form a skeleton of a drum rod screen, a plurality of tip support shaft rotation holes are provided between the fixing holes of the pair of bearing annular frames, a plurality of rotation holes are provided between the fixing holes of the insertion annular frame, tip support shafts at both ends of a rotating rod are loosely inserted into the tip support shaft rotation holes, and each rotating rod is provided rotatably about the rod central axis with the midpoint of the track of each rotating rod loosely passing through the respective rotation holes of the insertion annular frame, a pair of rotating rollers are provided on the front and rear of the drum rod screen, and the outer peripheries of the front and rear annular bearing frames are placed on the rotating rollers, and the rotating rollers are rotated by a drive motor to rotate in one direction around the cylindrical common central axis, wherein each of the rotating rods is constituted by a round bar having a circular cross section, the outer periphery of the round bar is covered with a hollow covering tube having a square cross section, the tip support shaft is formed on both ends of the round bar, and the hollow covering tube is divided between the front bearing annular frame and the insertion annular frame and between the rear bearing annular frame and the insertion annular frame.

When configured in this way, the rotating rod is made of a round bar with a circular cross section, which is covered by a hollow covering tube with a rectangular (e.g., square) cross section. Unlike conventional corners, the inside of the rotating rod is made of a round bar with a circular cross section, so the outer hollow covering tube rotates easily (it rotates on its axis). Therefore, when the viscous material of the raw material hits the corner of the hollow covering tube, the hollow covering tube rotates easily. As a result, pseudo lumps (mud balls) of the viscous material do not settle. In addition, when a stone or the like gets caught between the round bar and the rotation hole of the insertion annular frame as the round bar rotates, the stone or the like does not get caught between the round bar and the rotation hole of the insertion annular frame as the round bar rotates. Furthermore, by using a round bar as the rotating rod, the overall weight of the drum rod screen can be reduced.

Secondly, the drum rod screen according to the first aspect is configured such that one or two rectangular ring-shaped members are provided on the outer periphery of the hollow cladding tube, and the ring-shaped members are arranged in a staggered pattern with respect to adjacent rotating rods in the circumferential direction.

By configuring it in this way, a quadrangular (e.g., square) ring-shaped member is provided on the hollow covering tube, so the corners of this ring-shaped member do not cause the viscous material to turn into pseudo-lumps (mud balls), and it is possible to prevent mud balls and the like from settling, as was the case in the past. In addition, the raw material can be peeled off and crushed by coming into contact with the corners of the ring-shaped member.

Thirdly, two of the insertion annular frames are provided between the pair of bearing annular frames, and the distance between the range between the front bearing annular frame and the front insertion annular frame, the range between the two insertion annular frames, and the range between the rear insertion annular frame and the rear bearing annular frame are the same, and the rod center axis is a single round bar, but the hollow covering tube covering the round bar is divided into three for each range. This is configured by the drum rod screen described in the first or second embodiment.

In this configuration, two of the above-mentioned circular insert frames are provided, and the hollow covering tubes covered by the above-mentioned round rods are divided into three parts for each range, so that each range can rotate (spin) independently, which can further prevent viscous substances from settling. In addition, unlike the conventional corners, the inside of the rotating rod is made of a round rod with a circular cross section, so the hollow covering tube on the outside rotates easily (spins easily). Therefore, when the raw viscous substance hits the corner of the hollow covering tube, the hollow covering tube rotates easily, and as a result, viscous substances do not settling. In addition, when crushed stones or the like are caught between the rotating hole of the insert frame and the round rod due to the rotation of the round rod, the crushed stones or the like are not caught between the rotating hole of the insert frame and the round rod due to the rotation of the round rod. Furthermore, by using a round rod as the rotating rod, the overall weight of the drum rod screen can be reduced.

Fourthly, the drum rod screen according to the third aspect is configured such that one or two rectangular ring-shaped members are provided on the outer periphery of the hollow cladding tube divided into three, and the ring-shaped members are arranged in a staggered pattern with respect to the rotating rods adjacent in the circumferential direction.

By configuring it in this way, a quadrangular (e.g., square) ring-shaped member is provided on the hollow covering tube, so the corners of this ring-shaped member do not cause viscous substances to form lumps, and it is possible to prevent them from settling, as was the case with conventional methods. In addition, when the raw material comes into contact with the corners of the ring-shaped member, it is possible to peel off and crush the raw material.

Fifth, a pair of annular bearing frames are arranged on both sides on a common cylindrical central axis, an intermediate annular bearing frame is provided in the middle, an insert annular frame is provided between the front annular bearing frame and the intermediate annular bearing frame, an insert annular frame is provided between the rear annular bearing frame and the intermediate annular bearing frame, a plurality of fixing holes are provided in the circumferential direction of each of the annular bearing frames, the intermediate annular bearing frame, and each of the insert annular bearing frames, and a plurality of fixing rods are fixedly provided in each of the fixing holes to form the framework of the drum rod screen, and a plurality of tip support shaft rotation holes are provided between the fixing holes of the pair of annular bearing frames. a plurality of tip support shaft rotation holes are provided between the fixing holes of the intermediate bearing annular frame, a plurality of rotation holes are provided between the fixing holes of the insertion annular frame, a rotating rod is divided into two between the front bearing annular frame and the intermediate bearing annular frame and between the rear bearing annular frame and the intermediate bearing annular frame, the tip support shafts at both ends of the rotating rod in the front half are loosely inserted into the tip support shaft rotation holes of the front bearing annular frame and the intermediate bearing annular frame, and the tip support shafts at both ends of the rotating rod in the rear half are loosely inserted into the tip support shaft rotation holes of the rear bearing annular frame and the intermediate bearing annular frame, In a drum rod screen in which the intermediate portion of the track is loosely inserted through the rotation holes of the insertion annular frames, the rotating rods are rotatably mounted around the rod central axis, a pair of rotating rollers are provided on the front and rear of a frame, the outer peripheries of the front and rear annular bearing frames of the drum rod screen are placed on the front and rear rotating rollers, and the rotating rollers are rotated by a drive motor to rotate in one direction around the cylindrical common central axis. In this drum rod screen, the rotating rods are formed of round bars having a circular cross section, the outer peripheries of the round bars are covered with hollow covering tubes having a square cross section, the tip support shafts are formed on both ends of the round bars, and the hollow covering tubes are disposed on the front bearing annular frames, The drum rod screen is divided into two parts: between the intermediate bearing annular frame and the front-side through-ring frame, and between the intermediate bearing annular frame and the rear-side through-ring frame, and between the rear-side through-ring frame and the rear-side bearing annular frame. Furthermore, only between the front bearing annular frame and the front-side through-ring frame, and between the front-side through-ring frame and the intermediate bearing annular frame, square ring-shaped members are arranged in a staggered pattern between the rotating rods that are adjacent to the intermediate covering pipe in the circumferential direction.

In this configuration, if the raw material is not very moist and viscous, a hollow covering tube with a ring-shaped member is inserted only into the rotating rod of the front bearing annular frame and the intermediate bearing annular frame, and a hollow covering tube without a ring-shaped member is provided between the intermediate bearing annular frame and the rear bearing annular frame. This prevents high moisture and high viscosity materials from settling in the front half (between the front bearing annular frame and the intermediate bearing annular frame), and allows crushed stones and the like smaller than the sieve mesh S to fall through in the rear half (between the rear bearing annular frame and the intermediate bearing annular frame), improving the sieving efficiency.

Sixthly, the drum rod screen is configured with a plurality of cleaner plates arranged radially from the cleaner central axis in the upper left and/or upper right parts, the cleaner central axis being rotatably supported by the housing, the leading edges of the cleaner plates engaging with the plurality of rotating rods, and the drum rod screen rotates about the cylindrical common central axis, and the cleaner plates rotate in one direction about the cleaner central axis due to the rotation of the rotating rods, thereby preventing the settlement of viscous substances. The drum rod screen is configured with a drum rod screen as described in any one of the above items 1 to 4.

When configured in this way, the cross section of the rotating rod (hollow cladding tube) is square, the tip of the cleaner plate abuts against the hollow cladding tube, which has a square cross section, and the inside of the rotating rod is a round bar, making it easier for the hollow cladding tube to rotate, which makes it possible to prevent viscous substances and the like from settling, more than ever before.

According to the present invention, the rotating rod is made of a round bar with a circular cross section, and the round bar is covered with a hollow covering tube with a square cross section. Unlike the conventional corners, the inside of the rotating rod is made of a round bar with a circular cross section, so the outer hollow covering tube is easy to rotate (easy to rotate on its axis). Therefore, when the viscous material of the raw material hits the corner of the hollow covering tube, the hollow covering tube is easy to rotate. As a result, the viscous material does not settle. In addition, when a stone or the like is caught between the round bar and the rotation hole of the insertion ring frame due to the rotation of the round bar, the stone or the like is not caught between the round bar and the rotation hole of the insertion ring frame due to the rotation of the round bar. Furthermore, by using a round bar as the rotating rod, the overall weight of the drum rod screen can be reduced.

In addition, because a square ring-shaped member is provided in the hollow covering tube, the corners of this ring-shaped member do not cause viscous substances to form lumps, and this makes it possible to prevent them from settling, as was the case in the past. In addition, the raw materials can be peeled off and crushed by coming into contact with the corners of the ring-shaped member.

In addition, two of the above-mentioned circular insert frames are provided, and the hollow covering tubes covered by the above-mentioned round rods are divided into three parts for each range, so that each range can rotate (spin) independently, which can further prevent viscous substances from settling. In addition, unlike the conventional corners, the inside of the rotating rod is made of a round rod with a circular cross section, so the hollow covering tube on the outside rotates easily (spins easily). Therefore, when the viscous material of the raw material hits the corner of the hollow covering tube, the hollow covering tube rotates easily, and as a result, the viscous material does not settling. In addition, when a stone or the like is caught between the rotating hole of the insert frame and the round rod due to the rotation of the round rod, the stone or the like is not caught between the rotating hole of the insert frame and the round rod due to the rotation of the round rod. Furthermore, by using a round rod as the rotating rod, the overall weight of the drum rod screen can be reduced.

In addition, because a square ring-shaped member is provided in the hollow covering tube, the corners of this ring-shaped member do not cause viscous substances to form lumps, and this makes it possible to prevent them from settling, as was the case in the past. In addition, the raw materials can be peeled off and crushed by coming into contact with the corners of the ring-shaped member.

In addition, if the raw material does not have a high moisture content or high viscosity, a hollow covering tube with a ring-shaped member is inserted only into the rotating rods of the front bearing annular frame and the intermediate bearing annular frame, and a hollow covering tube without a ring-shaped member is provided between the intermediate bearing annular frame and the rear bearing annular frame. This prevents high moisture and high viscosity from settling in the front half, and allows stones smaller than the sieve mesh S to fall out in the rear half, improving the sieving efficiency.

In addition, the cross section of the rotating rod (hollow cladding tube) is square, the tip of the cleaner plate abuts against the hollow cladding tube, which has a square cross section, and the inside of the rotating rod is a round bar, which makes it easier for the hollow cladding tube to rotate, making it possible to prevent viscous substances from settling there, more than ever before.

FIG. 1 shows a side view of a drum rod screen according to the present invention (first embodiment). 2A and 2B are cross-sectional views taken along line YY in FIG. 1. FIG. 2 is a side view of the main part of the drum rod screen. FIG. 4 is a cross-sectional view showing a supporting state of the rotating rod at the right end of the drum rod screen. FIG. 2 is a front view showing the insertion annular frame of the drum rod screen. FIG. 2 is a front view showing the bearing annular frame of the drum rod screen. 2A is a perspective view of a round rod and a hollow cladding tube, and FIG. 2B is a perspective view of the round rod and the hollow cladding tube provided with a ring-shaped member. FIG. 1 shows a hollow cladding tube of the drum rod screen, where (a) and (b) are side views of the hollow cladding tube, and (c) is a front view of the hollow cladding tube. 1A and 1B are side views showing the state in which the hollow cladding tube is inserted into the round bar, and FIG. 1C is a side view showing the state in which the hollow cladding tube is inserted into the round bar. FIG. 2 is a partial side view of the drum rod screen. 5A and 5B are diagrams showing the relationship between the cleaner rubber of the drum rod screen and a hollow covering tube, in which FIG. 5A is a perspective view of the cleaner plate, and FIG. 5B is an explanatory diagram of the relationship between the drum rod screen and the cleaner plate. FIG. 2 is a perspective view showing the relationship between the round rods of the drum rod screen and the hollow cladding tube. FIG. 2 is a diagram showing the relationship between the round rods of the drum rod screen, the hollow cladding tube, and the rotation holes of the insertion annular frame. 4A is a perspective view of a cleaner plate showing one rubber plate of the drum rod screen, and FIG. 4B is a side view of the cleaner plate showing three divided rubber plates of the first embodiment. FIG. FIG. 2 is a perspective view of the drum rod screen (second embodiment). FIG. 2 is a perspective view of the inside of the drum rod screen (second embodiment). FIG. 4 is a side view showing a rotating rod of the drum rod screen (second embodiment).

The drum rod screen 1 according to the present invention is described in detail below.

First Embodiment
FIG. 1 is a schematic side view of a drum rod screen 1 of the present invention, FIGS. 2(a) and (b) are cross-sectional views of the drum rod screen 1 taken along line YY of the arrow, and FIG. 3 is a side view of a main part of the drum rod screen 1.

In FIG. 1, the left side of the paper is called the "front" and the right side of the paper is called the "rear", and the left-right direction when facing from the "rear" to the "front" is defined as the "left and right". In addition, raw materials are input from the front side of the drum rod screen 1, and small solid objects (stones, etc. (natural stones)) fall from the sieve mesh S (e.g., 25 mm opening) that constitutes the adjacent rotating rods 6, 6 onto the conveyor 8 below, and large solid objects (stones, etc. (natural stones)) fall from the sieve mesh S (e.g., 25 mm opening) onto the conveyor 9 from the rear. In addition, the drum rod screen 1 is configured so that the front side is higher and the rear side is lower, and on such a frame 2, the frame 2 and the cylinder common center axis P are configured parallel to each other so that the cylinder common center axis P is also higher on the front side and lower on the rear side. In addition, the center of the fixed rod 5 and the rotating rod 6 is called the rod center axis Q (see FIG. 1).

The annular bearing frame 3 at the front is referred to as the "front", the annular bearing frame 4 at the rear is referred to as the "rear", the annular insert frame 7 at the front is referred to as the "front side", and the annular insert frame 7 at the rear is referred to as the "rear side".

The drum rod screen 1 (see FIG. 1) has a ring-shaped annular bearing frame 3 at the front and a ring-shaped annular bearing frame 4 at the rear (both have the cylinder center axis P) (see FIG. 6), and between them (front and rear) are provided ring-shaped through-hole frames 7, 7 at regular intervals (see FIG. 5 and FIG. 1). Therefore, from the front to the rear, the range between the bearing annular frame 3 and the through-hole frame 7 is divided into range A, the range between the through-hole frames 7, 7 is divided into range B, and the range between the through-hole frame 7 and the bearing annular frame 4 is divided into range C (ranges A to C are equally spaced). Note that there may be only one through-hole frame 7, and in that case, the through-hole frame 7 is provided in the middle between the bearing annular frames 3 and 4.

Then, the annular bearing frames 3, 4 and the annular insertion frames 7, 7 are provided with five fixed rods 5 (circular in cross section) in the radial direction (see Figs. 2(a) and (b), 5 and 6; the angle of each fixed rod 5, 5 is 65 degrees to 75 degrees), and the annular bearing frames 3, 4 and the annular insertion frames 7, 7 are provided with five circular fixing holes 5' (through holes) in the circumferential direction (the positions of the fixing holes 5' of the annular bearing frames 3, 4 and the annular insertion frames 7, 7 are the same in the direction of the rod central axis Q, and the angle of each fixing hole 5' is 65 degrees to 75 degrees) (see Figs. 2(a) and (b), 5 and 6). By fixing the five fixed rods 5 to each fixing hole 5', a cylindrical skeleton of the drum rod screen 1 is formed around the common cylindrical central axis P (see Fig. 1). Note that the number of fixed rods 5 (the number of fixing holes 5') is one example, and other numbers can also be selected.

In addition, between the bearing annular frames 3, 4 and the insertion annular frames 7, 7, there are provided rotating rods 6 in the front-rear direction, with five or six between each of the fixed rods 5, 5 adjacent in the circumferential direction (there are 28 rotating rods 6 in total, see Figures 2(a) and (b), Figures 5 and 6). Therefore, if the fixed rods 5 and rotating rods 6 are combined, there are a total of 33 rods. Note that the number of rotating rods 6 (the number of rotating holes 6') is one example, and other numbers can also be selected.

As shown in Figure 7(a), the rotating rod 6 is a round bar 6a with a circular cross section, and hollow covering tubes 6c, 6c with a rectangular cross section (square in this case) are inserted on the outside of the round bar 6a, and both ends of the round bar 6a are provided with tip support shafts 6b, 6b with a smaller diameter (circular cross section) than the cross section of the round bar 6a. In other words, the rotating rod 6 is composed of the round bar 6a (both ends are tip support shafts 6b, 6b) and the hollow covering tube 6c (see Figure 3).

Between the fixing holes 5', 5' adjacent to each other in the circumferential direction, five or six circular rotation holes 6' (through holes, 28 rotation holes 6' in total (the number of rotation holes 6' is one example, and other numbers can be selected, see Figure 6) are provided in the bearing annular frame 3 and the bearing annular frame 4. Furthermore, ring-shaped disks 13, 13 are provided on the outside of the bearing annular frames 3, 4 around the rod central axis Q (see Figure 3), and a tip support shaft rotation hole 6" is provided concentrically with the rotation hole 6'. (The tip support shaft rotation holes 6" are the same number as the rotation holes 6', see Figures 3, 4, and 9). Note that the annular bearing frames 3, 4 and the ring-shaped disks 13, 13 are sometimes not separated and are referred to as the annular bearing frames 3, 4 as a single unit. In this case, it is expressed as the tip support shaft rotation holes 6", 6" being formed in the annular bearing frames 3, 4. Note that the tip support shaft rotation holes 6" are only one example, and other numbers can be selected. Note that the number of rotation holes 6' and the tip support shaft rotation holes 6" are the same.

The diameter of the rotation hole 6' is larger than the diameter of the round bar 6a, and the diameter of the tip support shaft rotation hole 6" is larger than the diameter of the tip support shaft 6b (the tip support shaft rotation hole 6" is smaller than the diameter of the round bar 6a) (see Figure 4). Although the bearing annular frame 3 is not shown, a ring-shaped disk 13 is provided on the outside of the bearing annular frame 3 and is symmetrical to the bearing annular frame 4 (see Figure 4 and Figures 9(a) to (c)).

In addition, the annular insertion frames 7, 7 have five or six circular rotation holes 6' (through holes, 28 rotation holes 6' in total, the number of rotation holes 6' is an example, other numbers can be selected, however, the number of rotation holes 6' (tip support shaft rotation holes 6") and the number of rotation rods 6 match) between the adjacent fixing holes 5', 5' in the circumferential direction, and these rotation holes 6' are formed slightly larger than the diameter of the round bar 6a (see Figures 3 and 5). The rotation holes 6' of the annular bearing frames 3, 4 and the annular insertion frames 7, 7 and the tip support shaft rotation hole 6" of the ring-shaped disk 13 are all configured with the same axial rod center axis Q, and one round bar 6a is inserted (see Figures 3 and 4).

The right end support shaft 6b of the round bar 6a is loosely inserted (inserted) through the rotation hole 6' into the end support shaft rotation hole 6" of the ring-shaped disk 13 of the rear bearing annular frame 4, and the middle of the track of the round bar 6a is loosely inserted (inserted) through each of the rotation holes 6', 6' of the insertion annular frames 7, 7, and the left end support shaft 6b of the round bar 6a is loosely inserted (inserted) through the rotation hole 6' into the end support shaft rotation hole 6" of the ring-shaped disk 13 of the front bearing annular frame 3, and the round bar 6a is configured to be rotatable (rotate to the right or left) in the direction of the rod center axis Q (see Figure 3).

The other 27 round bars 6a are similar, with the end support shafts 6b, 6b at both ends of the other 27 round bars 6a loosely inserted (passing through) the end support shaft rotation holes 6", 6" of the ring-shaped disks 13, 13 of the front and rear bearing annular frames 3, 4, respectively, and the middle of the track of the round bars 6a is loosely inserted (passing through) the rotation holes 6' of the insertion annular frames 7, 7, and is configured to be rotatable in the direction of the rod center axis Q (rotating to the right or left) (see Figure 13).

Furthermore, in the above-mentioned ranges A, B, and C, three hollow covering tubes 6c, 6c, 6c (with a rectangular (e.g., square) cross section) are covered on the outer periphery of one round bar 6a (see Fig. 3 and Fig. 7(a)). When the bearing annular frames 3, 4 and the insertion annular frame 7 are one unit, the hollow covering tube 6c is divided into two (see Fig. 7(a) and (b)). In addition, the relationship between the diameter T2 of the rotation hole 6' of the bearing annular frames 3, 4 and the insertion annular frames 7, 7 and the diagonal line T1 of the square cross section of the hollow covering tube 6c is configured such that the diameter T2 of the rotation hole 6' is smaller than the length T1 of the diagonal line of the hollow covering tube 6c so that the hollow covering tube 6c is not inserted into the rotation hole 6' (T1>T2, see Fig. 13). The round bar 6a shown in Figures 2(a) and (b) has a circular cross section, but in reality, as shown in Figures 7(a) and 13, the round bar 6a is covered with a hollow covering tube 6c.

The hollow covering tube 6c is divided into three parts, the above-mentioned range A, the above-mentioned range B, and the above-mentioned range C, for one round bar 6a (if the above-mentioned insertion annular frame 7 is one, the hollow covering tube 6c is divided into two parts) (see Figs. 7(a), (b), and 3). The length of the hollow covering tube 6c is formed slightly shorter than each of the ranges A, B, and C (see Fig. 3), and each hollow covering tube 6c can rotate left and right around the rod central axis Q (rotate right or left around the rod central axis Q) with respect to the round bar 6a (see Figs. 3 and 10). The hollow covering tube 6c rotates independently in the above-mentioned ranges A, B, and C, and each raw material hits the square corners of the cross section of the hollow covering tube 6c, so that it can rotate independently (rotate right or left) in the above-mentioned ranges A, B, and C (see Figs. 10 and 11).

The other 27 round bars 6a are similar, and in the other 27 round bars 6a, in the above-mentioned ranges A, B, and C, three hollow covering tubes 6c, 6c, 6c are covered for each round bar 6a, and the rotation of the hollow covering tube 6c is independent for each round bar 6a in ranges A to C. When there is one insertion annular frame 7, the hollow covering tube 6c is divided into two, and the rotation of the hollow covering tube 6c is independent for each range (see Figures 7(a) and (b)).

In addition, by making the rotating rod 6 the round bar 6a, the hollow cladding tube 6c can rotate easily (see FIG. 12). That is, conventionally, the inside of the hollow cladding tube 6c was a rectangular bar with a square cross section. Therefore, the hollow cladding tube, also with a square cross section, was covered by a rectangular bar with a square cross section. In this case, the rectangular bar and the hollow cladding tube had to rotate together, making it difficult for the hollow cladding tube itself to rotate. In contrast, in the present invention, the inside of the hollow cladding tube 6c is a round bar 6a, and the viscous material hits the corners of the hollow cladding tube 6c, making it easier for the hollow cladding tube 6c to rotate. This prevents the viscous material from settling and improves the sieving efficiency.

As shown in Figures 7(b) and 8, one or two quadrangular (here, square) ring-shaped members 6d are fixed to the hollow covering tube 6c.

The hollow cladding tube 6c provided with the two square ring-shaped members 6d has the ring-shaped members 6d, 6d at two locations near the outer circumferential end in the longitudinal direction, while the hollow cladding tube 6c provided with one square ring-shaped member 6d has the ring-shaped member 6d at the center (see Figure 7(b) and Figures 8(a) to (c)).

In the above ranges A, B, and C, the hollow covering tube 6c is arranged so that the ring-shaped members 6d are staggered between the circumferentially adjacent round bars 6a, 6a... (circumferentially adjacent rotating rods 6, 6...) by alternately arranging the hollow covering tube 6c with one ring-shaped member 6d and the hollow covering tube 6c with two ring-shaped members 6d, 6d (see Figure 1). Note that, when the hollow covering tube 6c is divided into two, the ring-shaped members 6d are staggered between the circumferentially adjacent rotating rods 6, 6 by alternately arranging the hollow covering tube 6c with one ring-shaped member 6d and the hollow covering tube 6c with two ring-shaped members 6d, 6d (see Figures 7(a)(b) and 8).

The hollow covering tube 6c may not need to be provided with the one or two ring-shaped members 6d. This means that if the moisture content, viscosity, etc. of the raw material is high, the ring-shaped members 6d may be provided, and if the moisture content, viscosity, etc. of the raw material is low, the ring-shaped members 6d may not be provided. Note that FIG. 1 illustrates an example in which the hollow covering tube 6c is provided with ring-shaped members 6d in a staggered arrangement.

Returning to FIG. 1, 10 is a cylindrical guide ring that protrudes forward from the annular bearing frame 3. It protrudes forward from the inner periphery of the ring-shaped disk 13 of the annular bearing frame 3 (see FIG. 3). 11 is a cylindrical small-diameter cylindrical portion that protrudes rearward from the annular bearing frame 4. The small-diameter cylindrical portion 11 protrudes rearward from the inner periphery of the ring-shaped disk 13 of the annular bearing frame 4. The small-diameter cylindrical portion 11 on the rear side of the guide ring 10 on the front side is formed longer in the front-to-rear direction.

The annular frames 7, 7 are provided with multiple base plates 19 in the circumferential direction, and ring-shaped barrier plates 18 are attached to the base plates 19 with bolts B (see Figures 2, 5, and 6). The ring-shaped barrier plates 18 are used to prevent highly viscous raw materials from easily moving toward the outlet, thereby crushing pseudo-lumps (mud balls) of viscous materials as finely as possible and improving sieving efficiency.

On the frame 2, the front rotating rollers 12a, 12a and the rear rotating rollers 12b, 12b are mounted on the bearings 15, 15 on the frame 2 (see Figures 1 and 2(a) and (b)), and the front rotating rollers 12a, 12a and the rear rotating rollers 12b, 12b are connected in the front-rear direction by the central shaft portion 12c. The outer periphery 3' of the front bearing annular roller 3 and the outer periphery 4' of the rear bearing annular roller 4 are placed on the rotating rollers 12a, 12a and the rotating rollers 12b, 12b (see Figures 1 and 2).

Furthermore, the central shaft portion 12c of the front rotating roller 12a is connected to the pulley of the drive motor M provided on the front side of the frame 2 via a bevel gear, so that the drum rod screen 1 can rotate in the direction of arrow D by driving the drive motor M.

9(a), (b) and (c) are diagrams for constructing one round bar 6a and three hollow covering tubes 6c, 6c and 6c. After arranging the three hollow covering tubes 6c, 6c and 6c in the above-mentioned range A, range B and range C, the right end portion (tip support shaft 6b) of the round bar 6a is inserted from the front side into the above-mentioned rotation hole 6' of the bearing annular frame 3 (see FIG. 9(b)), and the round bar 6a is inserted into the hollow covering tubes in the ranges A, B and C. The end support shaft 6b at the right end of the round bar 6a is loosely inserted into the rotation hole 6' and the end support shaft rotation hole 6" of the rear annular bearing frame 4, and finally the front ring-shaped disk 13 is closed on the front side of the annular bearing frame 3 (the front end support shaft 6b is loosely inserted into the end support shaft rotation hole 6" of the annular bearing frame 3, see FIG. 9(c)). The end support shafts 6b, 6b at both ends of the round bar 6a are loosely inserted into the end support shaft rotation holes 6", 6" of the ring-shaped disks 13, 13. The round bar 6a is also inserted (loosely inserted) into the rotation hole 6' of the annular insertion rods 7, 7. This configuration is repeated for the other 27 rotating rods 6 (see FIG. 12). When there is only one annular insertion rod 7, the hollow covering tubes 6c, 6c are divided into two.

In Fig. 2(a) (see Figs. 11(a) and (b)), the cleaner plate 14 is attached to the upper left, and in Fig. 2(b), the cleaner plates 14, 14 are attached to the upper left and upper right. The cleaner plate 14 is provided with eight rectangular rubber plates (cleaner plates) 14a from the cleaner central axis R (see Fig. 14(a)). When the tip edge 14b of the rubber plates 14a hits the rotating rod 6 (hollow coated tube 6c), the drum rod screen 1 rotates in the direction of arrow D, and is configured to rotate in the direction of arrow E without a dedicated power (see Figs. 2(a) and (b)). The cleaner central axis R is rotatably supported by the housing 17 (see Fig. 14(b)). As shown in FIG. 14(b), the rubber plate (cleaner plate) 14a is provided so that the rubber plates 14a, 14a, 14a come into contact with the rotating rod 6 (hollow coating tube 6c, 6c, 6c) in the ranges A, B, and C, respectively, and viscous substances and the like are removed from the rotating rod 6 in the ranges A to C (see FIG. 11(a) and (b)). Of course, when there is only one insertion annular frame 7, the plate-shaped rubber plates 14a, 14a are divided into two parts, front and back, and each of the two rubber plates 14a, 14a comes into contact with each rotating rod 6 (hollow coating tube 6c).

In addition, when there is only one inserting annular rod 7, the hollow covering tubes 6c, 6c are divided into two, and therefore the rubber plates 14a, 14a are also divided into two.

In addition, in Figures 2(a) and (b), the cross section of the round bar 6a inside the rotating rod 6 is represented as a circle, but more precisely, the outer circumference of the round bar 6a with a circular cross section is covered with a hollow covering tube 6c with a square cross section (see Figure 13).

As shown in Figure 7 (b) and Figures 8 (a) to (c), the hollow covering tube 6c is a rectangular rod (with a square cross section) and the ring-shaped member 6d is also square. In the conventional circular ring-shaped member, viscous substances and the like were the cause of pseudo lumps (mud balls) settling. However, since the hollow covering tube 6c has a rectangular cross section (e.g., square) and the ring-shaped member 6d is also rectangular (e.g., square) (see Figures 2 (a) and (b)), the viscous substances and the like are removed at the square corners of the hollow covering tube 6c, and as a result, pseudo lumps (mud balls) of viscous substances and the like do not settling. Also, since the ring-shaped member 6d is square, the viscous substances and the like are removed at the corners of the ring-shaped member 6d, and as a result, viscous substances and the like do not settling, and good cleaning performance can be achieved. The reference numeral 17 denotes a housing.

The present invention is configured as described above, and the operation of the present invention will be described below. As shown in FIG. 1, a hollow cladding tube 6c is inserted into a round bar 6a in ranges A to C, and one or two square ring-shaped members 6d are provided on the hollow cladding tube 6c, and the ring-shaped members 6d are provided in a staggered arrangement between adjacent rotating rods 6, 6 in the circumferential direction as shown in FIG. 1.

In this state, the drive motor M is driven to rotate the drum rod screen 1 in the direction of the arrow D. This causes the cleaner plate 14 to also rotate in the direction of the arrow E (see Figures 2(a) and (b)).

In this state, the raw material is further fed into the drum rod screen 1 from the front guide link 10. The raw material contains high moisture and viscous materials (residual soil) such as mud, as well as solid objects such as large and small stones. Solid objects such as stones that are smaller than the gap between the rotating rods 6, 6, i.e., the square sieve mesh S (e.g., 25 mm opening) in Figure 10, fall downward from the rotating rods 6, 6 onto the conveyor 8 and are transported in the direction of arrow F (forward).

In addition, solid objects such as stones that are larger than the square sieve mesh S (e.g., 25 mm opening) fall downward from the small diameter cylindrical section 11 at the rear, onto the conveyor 9, and are transported in the direction of arrow G. This allows solid objects smaller and larger than the sieve mesh S to be sieved.

In addition, since the inside of the hollow covering tube 6c is a round bar 6a, the hollow covering tube 6c is easier to rotate (spin on its axis) than before, and the hollow covering tube 6c rotates more (spins to the right or left around the rod central axis Q), making it less likely for pseudo lumps (mud balls) of viscous substances to settle (see Figure 11 (a)).

In other words, the viscous material containing moisture from the raw material comes into contact with the corners of each hollow covering tube 6c, 6c, 6c in the above ranges A, B, and C, and the hollow covering tubes 6c, 6c, 6c rotate independently in the above ranges A to C (rotating to the right or left around the rod central axis Q), making it difficult for false lumps (mud balls) of the viscous material to settle, and as a result, the sieving efficiency can be improved (see Figure 11 (a)).

Furthermore, the hollow covering tube 6c has the square ring-shaped members 6d arranged in a staggered arrangement between the rotating rods 6, 6 adjacent in the circumferential direction (see Figs. 1, 2, 7(b), and 8), and viscous substances such as mud are crushed at the square corners (see Figs. 11(a) and 11(b)). This makes it more difficult for pseudo lumps (mud balls) to settle, and as a result, the screening efficiency can be improved. In addition, when a stone or the like is caught between the rotating hole 6' of the insertion annular frame 7, 7 and the round bar 6a due to the rotation of the round bar 6a, the stone or the like is not caught between the rotating hole 6' of the insertion annular frame 7, 7 and the round bar 6a due to the rotation of the round bar 6a (see Fig. 12). Furthermore, by using the round bar 6a as the rotating rod 6, the overall weight of the drum rod screen 1 can be reduced compared to conventional square bars.

In addition, because the round bar 6a passes through the rotation hole 6' of the insertion annular frames 7, 7, the likelihood of solid objects such as stones getting caught is reduced, and as a result, solid objects smaller than the sieve mesh S fall onto the conveyor 8, and solid objects larger than the sieve mesh S fall onto the conveyor 9, improving the sieving efficiency. In other words, when a stone or the like gets caught between the rotation hole 6' of the insertion annular frames 7, 7 and the round bar 6a due to the round bar 6a rotating (turning on its axis) more than before, the rotation of the round bar 6a prevents the stone or the like from getting caught between the rotation hole 6' of the insertion annular frames 7, 7 and the round bar 6a.

In addition, by rotating the cleaner plate 14 in the direction of the arrow E, the hollow covering tubes 6c, 6c, 6c are easier to rotate around the rod central axis Q than before because the insides of the hollow covering tubes 6c, 6c, 6c are round bars 6a (see Figures 3 and 11(b)). In each of the above ranges A, B, and C, the hollow covering tubes 6c, 6c, 6c rotate independently, which prevents pseudo lumps (mud balls) of viscous materials from settling, improving the sieving efficiency. In addition, because the ring-shaped member 6d is also square (see Figure 7(b)), viscous materials are crushed at the corners of the square ring-shaped member 6d, making it less likely for materials to settling, improving the sieving efficiency.

In addition, because the square ring-shaped member 6d is provided, viscous substances with high moisture content can be peeled off and crushed at the corners of the square ring-shaped member 6d, and because the hollow covering tube 6c rotates well, no false lumps (mud balls) are generated, and the false lumps are peeled off and crushed, making them finer and improving the sieving efficiency (see Figure 11 (a)).

If the raw material does not contain a high moisture content or high viscosity substances, there is no need to provide a ring-shaped member 6d on the hollow covering tube 6c. In this case, the inside of the hollow covering tube 6c is a round bar 6a, so the hollow covering tube 6c rotates well (rotates to the right or left) (see Figure 11 (a)). When viscous substances hit the corners of the hollow covering tube 6c, the hollow covering tube 6c rotates well, preventing the viscous substances from settling, and as a result, the sieving efficiency can be improved.

When only one through-hole frame 7 is provided between the front and rear bearing annular frames 3, 4, the hollow covering tubes 6c, 6c are divided into two for the rotating rod 6. Even in this case, the inside of the rotating rod 6 (hollow covering tube 6c) is a round bar 6a, so the hollow covering tubes 6c, 6c rotate well, preventing viscous substances and the like from settling.

In addition, when only one through-hole frame 7 is provided between the front and rear bearing annular frames 3, 4, even when square ring-shaped members 6d are provided on the hollow covering tubes 6c, 6c (if provided, they are provided in a staggered arrangement), viscous substances, etc. come into contact with the corners of the square ring-shaped member 6d and are crushed, which prevents them from settling and improves screening efficiency.

(Second embodiment) See Figures 15 to 17. The drum rod screen 1 according to the second embodiment of the present invention has an intermediate annular bearing frame 16 in the intermediate portion between the front annular bearing frame 3 and the rear annular bearing frame 4, and a front-side through-hole frame 7 is present between the intermediate annular bearing frame 16 and the front annular bearing frame 3 (intermediate portion), and a rear-side through-hole frame 7 is present between the intermediate annular bearing frame 16 and the rear annular bearing frame 4 (intermediate portion). The front-side through-hole frame 7 is expressed as the "front side", the rear-side through-hole frame 7 is expressed as the "rear side", the hollow covering tubes 6c, 6c in the first half ranges H, I are expressed as the "first half", and the hollow covering tubes 6c, 6c in the second half ranges J, K are expressed as the "second half". The front half round bar 6a is expressed as the "first half" and the second half round bar 6a is expressed as the "second half" (see Figure 17).

The number of fixing holes 5' in the front bearing annular frame 3, the rear bearing annular frame 4, the through-hole frames 7, 7, and the intermediate bearing annular frame 16 is eight (each at an angle of 45 degrees), and the number of rotating holes 6' and tip support shaft rotating holes 6" (number, diameter) is five or six between the fixing holes 5' in the circumferential direction (the number of rotating holes 6' is 42 for each). The diameter is the same as in the first embodiment. Note that the number of fixing holes 5', the number of fixed rods 5, the number of rotating holes 6', tip support shaft rotating holes 6", and the number of rotating rods 6 are only examples, and other numbers can be selected. However, the numbers of fixing holes 5' and fixed rods 5, the number of rotating holes 6', tip support shaft rotating holes 6", and rotating rods 6 are the same.

In addition, eight fixed rods 5 are fixed to the fixing holes 5' (through holes) of the front bearing annular frame 3, the rear bearing annular frame 4, and the insertion annular frames 7, 7, thereby forming the framework of the drum rod screen 1. Furthermore, five or six rotation holes 6' (through holes) are provided between adjacent fixing holes 5' in the circumferential direction of the insertion annular frames 7, 7, and five or six tip support shaft rotation holes 6" (through holes) are provided between adjacent fixing holes 5' in the circumferential direction in the intermediate bearing annular frame 16, and five or six rotation holes 6' (through holes) are provided between adjacent fixing holes 5' in the circumferential direction in the front bearing annular frame 3 and the rear bearing annular frame 4, and five or six tip support shaft rotation holes 6" (through holes) are provided concentrically with the rotation holes 6'. These fixed holes 5', rotating holes 6', and tip support shaft rotating holes 6" are located at the same position centered on the rod central axis Q (there are 42 rotating holes 6' and 42 tip support shaft rotating holes 6"). 42 rotating rods 6 are loosely inserted (inserted) into the rotating holes 6' and the tip support shaft rotating holes 6". The total number of fixed rods 5 and rotating rods 6 is 50.

As shown in Figure 17, the front and rear insertion annular frames 7, 7 have the intermediate bearing annular frame 16 provided between them, and the round bars 6a are divided into two, with one rod central axis Q at the center, between the front half range H and range I, and between the rear half range J and range K. Therefore, there are 42 round bars 6a in the front half and 42 round bars 6a in the rear half. In other words, the front half round bars 6a and the rear half round bars 6a are each provided on one rod central axis Q, and the above ranges H to K are equidistant (see Figure 17). Therefore, the rotating rods 6 (round bars 6a, hollow covering tubes 6c, a total of 42 pieces) are inserted through the rotating holes 6' and the tip support shaft rotating holes 6" of the front bearing annular frame 3, the front insert annular frame 7, and the intermediate bearing annular frame 16. Also, the rotating rods 6 (round bars 6a, hollow covering tubes 6c, a total of 42 pieces) are inserted through the rotating holes 6' and the tip support shaft rotating holes 6" of the rear bearing annular frame 4, the rear insert annular frame 7, and the intermediate bearing annular frame 16.

As described above, the front end tip support shaft 6b of the front end of the front round bar 6a is loosely inserted (inserted) into the tip support shaft rotation hole 6" of the ring-shaped disk 13 via the rotation hole 6' of the front bearing annular frame 3, the middle of the track of the front round bar 6a is loosely inserted (inserted) into the rotation hole 6' of the front insertion annular frame 7, and the rear end tip support shaft 6b is loosely inserted (inserted) into the rotation hole 6" of the intermediate bearing annular frame 16.

The tip support shaft 6b at the front end of the rear half round bar 6a is loosely inserted (inserted) into the rotation hole 6" of the intermediate bearing annular frame 16, the middle of the track of the rear half round bar 6a is loosely inserted (inserted) into the rotation hole 6' of the rear insertion annular frame 7, and the tip support shaft 6b of the rear half round bar 6a is loosely inserted (inserted) into the tip support shaft rotation hole 6" of the ring-shaped disk 13 via the rotation hole 6' of the rear bearing annular frame 4.

The hollow covering tubes 6c, 6c, 6c, 6c are inserted into the outer periphery of the round bar 6a in the above-mentioned ranges H, I, J, and K, respectively, and one or two square ring-shaped members 6d are provided on the hollow covering tubes 6c, 6c only in the first half of the ranges H and I (see Figures 15 and 16). That is, the ring-shaped members 6d, 6d are provided in a staggered arrangement between the rotating rods 6, 6 adjacent in the circumferential direction in the above-mentioned ranges H and I, and no ring-shaped members 6d are provided in the above-mentioned ranges J and K.

Of course, square ring-shaped members 6d may be provided on the hollow covering tubes 6c, 6c in ranges J and K as well (if provided, they are provided in a staggered arrangement), but if the raw material is not particularly high in moisture and is not highly viscous such as mud, it is possible to provide square ring-shaped members 6d only in the above ranges H and I, and not provide the above square ring-shaped members 6d in the above ranges J and K. For example, if the raw material is high in moisture and highly viscous such as mud, ring-shaped members 6d may be provided in ranges J and K as well.

In the second embodiment of the present invention, a case will be described in which square ring-shaped members 6d are provided in a staggered arrangement only in the ranges H and I, and ring-shaped members 6d are not provided in the ranges J and K. The number of fixed rods 5 is eight, the number of rotating rods 6 is 42, and the intermediate bearing annular frame 16 is provided with eight fixing holes 5' for the fixed rods 5, to which the eight fixed rods 5 are fixed (see Figures 15 and 16). The intermediate bearing annular frame 16 is provided with five tip support shaft rotation holes 6" between the fixing holes 5', 5' in the circumferential direction (the number of tip support shaft rotation holes 6" is 42 in total), and the tip support shaft 6b at the rear end of the front half of the round bar 6a and the tip support shaft 6b at the front end of the rear half of the round bar 6a engage from the front and rear. The diameter of the tip support shaft rotation hole 6" is larger than the diameter of the tip support shaft 6b and smaller than the diameter of the round bar 6a.

The number of fixing holes 5' (8 holes), rotating holes 6' and tip support shaft rotating holes 6" in the bearing annular frames 3, 4 and the insertion annular frames 7, 7 is 42. Five or six rotating rods 6 are arranged between the fixed rods 5, 5 and are capable of rotating (rotating) around the rod central axis Q (there are 42 rotating rods 6 in total). The sieve mesh S (e.g., 25 mm opening), the configuration of the drive motor M and the configuration of the rotating rollers 12a, 12b are the same as in the first embodiment.

The comb plate 14a of the cleaner plate 14 is provided with four rubber plates 14a, 14a, 14a, 14a, which are separated from each other and arranged in the front-rear direction with respect to the cleaner central axis R in the above-mentioned ranges H, I, J, K, and each tip edge 14b, 14b, 14b, 14b is in contact with each rotating rod 6 (hollow covering tube 6c).

In addition, the annular insertion frames 7, 7 have multiple base plate portions 19 to which ring-shaped dam plates 18 are attached by bolts B. This configuration is the same as in the first embodiment.

The present invention (second embodiment) is configured as described above, and the operation of the present invention will be described below. As shown in FIG. 1, hollow cladding tubes 6c, 6c, 6c, 6c are inserted into the round bar 6a in the ranges H to K, and one or two square ring-shaped members 6d are provided in the hollow cladding tube 6c only in the ranges H and I, and the ring-shaped members 6d are provided in a staggered arrangement between the rotating rods 6, 6 adjacent in the circumferential direction as shown in FIG. 13.

In this state, the drive motor M is driven to rotate the drum rod screen 1 in the direction of the arrow D. Then, the cleaner plate 14 also rotates in the direction of the arrow E (see Figs. 2(a) and (b)). Furthermore, in this state, the raw material is fed into the drum rod screen 1 from the front guide link 10. The raw material contains high moisture and viscous materials such as mud, as well as solid objects such as large and small stones. This is also the case when the raw material does not contain a high moisture content and viscous materials such as mud. When the raw material contains high moisture and viscous materials, square ring-shaped members 6d are provided on the hollow covering tubes 6c, 6c in the latter ranges J and K as well.

In the first half of the ranges H and I, the hollow covering tube 6c rotates independently (on its axis), and the corners of the square ring-shaped member 6d and the corners of the cross section of the hollow covering tube 6c prevent viscous materials such as mud from settling. In the second half of the ranges J and K, crushed stones and other materials smaller than the sieve mesh S of the adjacent rotating rods 6, 6 fall onto the conveyor 8 below and are transported in the direction of the arrow F (forward).

In addition, solid objects such as stones (natural stones) larger than the sieve mesh S fall downward from the small diameter cylindrical section 11 at the rear, onto the conveyor 9, and are transported in the direction of arrow G. Incidentally, even in the above-mentioned first half ranges H and I, stones (natural stones) smaller than the sieve mesh fall onto the lower conveyor 8 and are transported in the direction of arrow F (forward).

In addition, in the first half of the ranges H and I, the hollow covering tube 6c rotates (spins) independently, and since the inside of the hollow covering tube 6c is a round bar 6a, the hollow covering tube 6c is easier to rotate (rotates clockwise or counterclockwise around the rod central axis Q) than before. Viscous substances, etc. hit the corners of the hollow covering tube 6c, and also hit the corners of the square ring-shaped member 6d, causing the first half of the hollow covering tube 6c to rotate more (rotates clockwise or counterclockwise around the rod central axis Q). As a result, the hollow covering tubes 6c, 6c rotate independently in the first half of the ranges H and I, making it difficult for false lumps (mud balls) of viscous substances to settle. As a result, the sieving efficiency is also improved.

In addition, in the latter half of the drum rod screen 1, in ranges J and K, the hollow coating tubes 6c, 6c in each range rotate independently (rotate clockwise or counterclockwise around the rod central axis Q) when viscous substances hit the corners, making it difficult for viscous substances to settle, improving the screening efficiency.

In addition, the round bar 6a passes through the rotation hole 6' of the annular insertion frames 7, 7, reducing the risk of stones getting caught.

Overall, in the first half of the ranges H and I, the settlement of viscous substances and the like is mainly eliminated, and in the second half of the ranges J and K, stones and the like (natural stones) smaller than the sieve mesh S fall downward and are transported in the direction of arrow F by the conveyor 8, while stones and the like (natural stones) larger than the sieve mesh S fall downward from the small diameter cylindrical section 11 at the rear and are transported in the direction of arrow G by the conveyor 9.

In addition, by rotating the cleaner plate 14 in the direction of the arrow E, the hollow covering tube 6c, which has a round bar 6a inside, is easier to rotate around the rod central axis Q than in the past, and in each of the above ranges H to K, the hollow covering tubes 6c, 6c, 6c, 6c rotate independently clockwise or counterclockwise, preventing the settling of viscous materials and the like and improving the sieving efficiency. In addition, the first half of the ring-shaped members 6d, 6d are also square, making it difficult for viscous materials and the like to settling, and improving the sieving efficiency. In addition, the raw material comes into contact with the corners of the square ring-shaped member 6d, making it possible to peel and crush the raw material.

In addition, when a stone or the like becomes caught between the round bar 6a and the rotation hole 6' of the annular frame 7, 7 as a result of the rotation of the round bar 6a, the stone or the like does not become caught between the round bar 6a and the rotation hole 6' of the annular frame 7, 7 as a result of the rotation of the round bar 6a. Furthermore, by using the round bar 6a as the rotating rod 6, the overall weight of the drum rod screen 1 can be reduced.

According to the present invention, the rotating rod 6 is composed of a round bar 6a with a circular cross section, and the round bar 6a is covered with a hollow covering tube 6c with a square cross section. The inside of the rotating rod 6 is composed of the round bar 6a with a circular cross section, unlike the conventional cross section with a corner. Therefore, the outer hollow covering tube 6c is easy to rotate (easy to rotate on its axis). Therefore, when the viscous material of the raw material hits the corner of the hollow covering tube 6c, the hollow covering tube 6c is easy to rotate. As a result, the viscous material does not settle. In addition, when a stone or the like is caught between the rotation hole 6' of the insertion annular frame 7 and the round bar 6a due to the rotation of the round bar 6a, the stone or the like is not caught between the rotation hole 6' of the insertion annular frame 7 and the round bar 6a due to the rotation of the round bar 6a. Furthermore, by using the round bar 6a as the rotating rod 6, the overall weight of the drum rod screen 1 can be reduced.

In addition, the hollow covering tube 6c is provided with a square ring-shaped member 6d, so the corners of the ring-shaped member 6d do not cause viscous substances to form lumps, and this makes it possible to prevent the substances from settling, as was the case in the past. In addition, the raw materials can be peeled off and crushed by coming into contact with the corners of the ring-shaped member 6d.

In addition, two of the above-mentioned circular insertion frames 7, 7 are provided, and the hollow covering tube 6c covered by the round bar 6a is divided into three for each of the three ranges A, B, and C, so that each range A, B, and C can rotate (spin) independently, which can further eliminate the settlement of viscous substances, etc. In addition, the inside of the rotating rod 6 is composed of a round bar 6a with a circular cross section, unlike the conventional square cross section, so the hollow covering tube 6c on the outer periphery is easy to rotate (easy to rotate), and therefore, when the raw viscous substance hits the corner of the hollow covering tube 6c, the hollow covering tube 6c is easy to rotate, which makes it easier for the hollow covering tube 6c to rotate, and as a result, the settlement of viscous substances does not occur. In addition, when a stone or the like gets caught between the round bar 6a and the rotation hole 6' of the insertion annular frame 7, 7 due to the rotation of the round bar 6a, the stone or the like does not get caught between the round bar 6a and the rotation hole 6' of the insertion annular frame 7, 7 due to the rotation of the round bar 6a. Furthermore, by using the round bar 6a as the rotating rod 6, the overall weight of the drum rod screen 1 can be reduced.

In addition, the hollow covering tube 6c is provided with a square ring-shaped member 6d, so the corners of the ring-shaped member 6d do not cause viscous substances to form lumps, and this makes it possible to prevent the substances from settling, as was the case in the past. In addition, the raw materials can be peeled off and crushed by contacting the corners of the ring-shaped member 6d.

In addition, if the raw material is not very moist or viscous, a hollow covering tube 6c with a square ring-shaped member 6d is inserted only into the rotating rod 6 of the front bearing annular frame 3 and the intermediate bearing annular frame 16, and a hollow covering tube 6c without a ring-shaped member is provided between the intermediate bearing annular frame 16 and the rear bearing annular frame 4. This prevents high moisture and high viscosity materials from settling in the front half, and allows crushed stones and the like smaller than the sieve mesh S to fall through in the rear half, improving the sieve efficiency.

The cross section of the rotating rod 6 (hollow covering tube 6c) is rectangular (e.g., square), the tip edge 14b of the cleaner plate 14 abuts against the hollow covering tube 6c, which has a square cross section, and the inside of the rotating rod 6 is a round bar 6a, which makes it easy for the hollow covering tube 6c to rotate, making it possible to prevent viscous substances and the like from settling, as compared to the conventional method. In addition, in Figures 1 and 2, 17 is a housing.

The drum rod screen 1 according to the present invention can reliably screen raw materials such as stones that contain highly viscous and high-moisture mud, and can be widely used as a screening device for various quarries, industrial waste, etc.

1 Drum rod screen 2 Frame 3, 4 Bearing annular frame 3', 4' Outer periphery 5 Fixed rod 5' Fixed hole 6 Rotating rod 6' Rotating hole 6" End support shaft rotating hole 6a Round bar 6b End support shaft 6c Hollow covering tube 6d Ring-shaped member 7 Inserted annular frame 12a, 12b Rotating roller 14 Cleaner plate 14a Rubber plate 14b End edge 16 Intermediate bearing annular frame 17 Housing A, B, C Range H, I, J, K Range M Drive motor P Cylinder common central axis Q Rod central axis R Cleaner central axis

Claims (6)

a pair of annular bearing frames are disposed on both sides on a common central axis of the cylinder, an insertion annular frame is provided in the middle, a plurality of fixing holes are provided in the circumferential direction of each of the annular bearing frames and the insertion annular frame, and a plurality of fixing rods are fixedly provided in each of the fixing holes to form a skeleton of a drum rod screen, a plurality of tip support shaft rotation holes are provided between the fixing holes of the pair of annular bearing frames, a plurality of rotation holes are provided between the fixing holes of the insertion annular frame, tip support shafts at both ends of a rotating rod are loosely inserted into each of the tip support shaft rotation holes, and each rotating rod is provided so as to be rotatable about the rod central axis with a midpoint of the track of each rotating rod loosely inserted into each of the rotation holes of the insertion annular frame, a pair of rotating rollers are provided at the front and rear of a frame, each outer periphery of the annular bearing frames at the front and rear of the drum rod screen is placed on the rotating rollers, and the rotating rollers are rotationally driven by a drive motor to be rotationally driven in one direction about the common central axis of the cylinder,
Each of the rotating rods is made of a round bar having a circular cross section, and the outer periphery of the round bar is covered with a hollow covering tube having a rectangular cross section, and the tip support shaft is formed on both ends of the round bar,
13. A drum rod screen comprising : a hollow covering tube, the hollow covering tube being divided between the front bearing annular frame and the insertion annular frame , and between the rear bearing annular frame and the insertion annular frame. One or two rectangular ring-shaped members are provided on the outer periphery of the hollow cladding tube,
2. The drum rod screen of claim 1, wherein the ring-shaped members are staggered with respect to circumferentially adjacent rotating rods. Two of the insertion annular frames are provided between the pair of bearing annular frames, and the distance between the front bearing annular frame and the front insertion annular frame, the distance between the two insertion annular frames, and the distance between the rear insertion annular frame and the rear bearing annular frame are the same,
3. A drum rod screen according to claim 1 or 2, wherein the rod central axis is a single round bar, but the hollow covering tube covering the round bar is divided into three for each range. one or two rectangular ring-shaped members are provided on an outer periphery of the hollow cladding tube divided into three;
4. The drum rod screen of claim 3, wherein the ring-shaped members are staggered with respect to circumferentially adjacent rotating rods. A pair of annular bearing frames are disposed on both sides on a common cylindrical central axis, an intermediate annular bearing frame is provided in the middle, an inserting annular frame is provided between the front annular bearing frame and the intermediate annular bearing frame, an inserting annular frame is provided between the rear annular bearing frame and the intermediate annular bearing frame, a plurality of fixing holes are provided in the circumferential direction of each of the annular bearing frames, the intermediate annular bearing frame and each of the inserting annular bearing frames, and a plurality of fixing rods are fixedly provided in each of the fixing holes to form a skeleton of a drum rod screen, and a plurality of tip support shaft rotation holes are provided between the fixing holes of the pair of annular bearing frames, a plurality of tip support shaft rotation holes are provided between the fixing holes of the intermediate annular bearing frame, and a plurality of rotation holes are provided between the fixing holes of the inserting annular frame, a rotating rod is divided into two between the rear annular bearing frame and the intermediate annular bearing frame, end support shafts at both ends of the rotating rod of the front half are loosely inserted into the end support shaft rotation holes between the front annular bearing frame and the intermediate annular bearing frame, end support shafts at both ends of the rotating rod of the rear half are loosely inserted into the end support shaft rotation holes between the rear annular bearing frame and the intermediate annular bearing frame, and each rotating rod is provided rotatably about the rod central axis in a state where midpoints of the tracks of each rotating rod are loosely inserted into the respective rotation holes of each insertion annular frame, a pair of rotating rollers are provided at the front and rear of a frame, each outer periphery of the front and rear annular bearing frames of the drum rod screen is placed on the front and rear rotating rollers, and the rotating rollers are rotationally driven by a drive motor to be rotationally driven in one direction about the cylindrical common central axis;
Each of the rotating rods is made of a round bar having a circular cross section, and the outer periphery of the round bar is covered with a hollow covering tube having a rectangular cross section, and the tip support shaft is formed on both ends of each of the round bars,
The hollow covering tube is divided into two parts, one between the front bearing annular frame and the front side inserting annular frame, and the other between the front side inserting annular frame and the intermediate bearing annular frame; the other between the intermediate bearing annular frame and the rear side inserting annular frame, and the other between the rear side inserting annular frame and the rear bearing annular frame;
Furthermore, the drum rod screen has square ring-shaped members arranged in a staggered configuration on the hollow covering tube between adjacent rotating rods in the circumferential direction only between the front bearing annular frame and the front side insertion annular frame, and between the front side insertion annular frame and the intermediate bearing annular frame. In the drum rod screen, a plurality of cleaner plates are provided radially from a cleaner central shaft in the upper left and/or upper right parts, the cleaner central shaft is rotatably supported by a housing, and the leading edges of the cleaner plates are engaged with the plurality of rotating rods,
The drum rod screen according to any one of claims 1 to 5, wherein the drum rod screen rotates about the cylindrical common central axis, and the cleaner plate rotates in one direction about the cleaner central axis due to the rotation of the rotating rod, thereby preventing viscous substances from settling thereon.

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