TW457131B - Sand sorting device and cylinder sieve used therein - Google Patents

Abstract

This invention is to provide a sand sorting device and a cylinder sieve used therein to reliably and quickly move sand, reliably and efficiently carry out classification of sand with particle size within a standard and sand with particle size out of the standard, to make a sand transporting apparatus possible to transport a large quantity of uniform sand, and to reliably attain sufficient water draining capability by efficiently transmitting the vibration to transporting members. The sand sorting apparatus is provided with a water tank 2, a cylinder sieve 9 for separating sand with a particle size within a standard and sand with a particle size out of the standard, a sand carrying out apparatus 7 comprising a wrapping connector driving member 15 wound around a plurality of transmission wheels 10-14 and a plurality of carrying out members 16, linear guide rails 18 installed in the sand carrying out direction, guide members 19 fixed in the down face of the carrying out members 16 and engaged with the guide rails 18 in a manner the members can slide, an inclined tank 20 so disposed slantingly to the lower side of the guide rails 18, and a vibration application apparatus 21 to apply vibration to the carrying out members 16 through the guide rails 18 and the guide members 19.

Description

457131 V. Description of the invention ---- -----— [Industrial use category] The present invention relates to a sand selection device and a cylinder used thereon = a boat, and in particular: a sand selection device, which is used for crushing concrete. Sand ^ In the final process of manufacturing high-quality crushed sand, the sand with the inner grain size 2 is separated from the sand with the grain size outside the specification. The water contained in the sand with the grain size within the specification is separated. The barrel sieve is used to separate the sand with the size within the specification from the stone with the size outside the plate. [Known technology] The device for manufacturing concrete crushed sand is to supply raw sand and water to the cylindrical barrel containing the media stone. As the cylindrical barrel rotates, the agitating effect of the media stone The device for making crushed sand by crushing or grinding the aforementioned raw sand. The crushed sand that has been pulverized into the specifications has a size passing through a screen provided on the outer peripheral surface of the end of the discharge side of the aforesaid bucket-shaped barrel, together with water, and is discharged to the above-mentioned concrete crushing sand manufacturing device. The sand selection device is a device that separates the sand with the internal particle size and the sand with the external particle size discharged from the aforementioned crushed sand manufacturing device for concrete, and separates the water contained in the sand with the internal particle size. An example is referred to Figure J 9 reveals the sand selection device 201 described in Japanese Patent Application Laid-Open No. 10-305237. ^ This article is a sand selection device 201, which includes a cylindrical screen 204, which is rotatably arranged in a water tank 202 and has a shaft. The sand and water are supplied in a mixed state at one end side, and the sand with a grain size within the specification is discharged to the aforementioned water tank 202 through the outer sieve 203 to have a substantially cylindrical shape; and a sand removing device 208 is provided. A ring-shaped winding transmission member 206 is wound on a pair of transmission wheels 205, and has a plurality of unloading members 207, which are connected to

Page 4 457131

The aforesaid coiling transmission member 206 is outside the aforesaid water tank 202 of the specifications; & includes a guide member 209, which is arranged along the sand carrying out direction of the carrying out member 207 and is regulated perpendicular to the carrying out direction when carrying out The movement of the carrying-out member 207 in the direction; and includes a vibration imparting device 210 for applying vibration to the carrying-out member 207 through the guide member 209; and including a support member 211, which is erected on Those who impart 210 on the floor. fin As shown in FIG. 20, the cylindrical sieve 2 04 of this conventional sand selection device 200 has a first small diameter portion 212 on one end side in the axial direction and a second small diameter on the other end portion in the axial direction. The portion 213 includes a large-diameter portion 21 4 provided with a screen 203 on the outer periphery. The first small branch portion 21 2 is connected to the end wall 215 of one end side of the large diameter portion 21 4 in the axial direction. The inner peripheral surface 216 of the first small diameter portion 212 and the end wall 215 of the large diameter portion 214. The inner side surface 217 intersects slightly perpendicularly, and an end portion of the second small diameter portion 213 is inserted into the large diameter portion 214 to form a cylindrical insertion portion 218 having the same diameter as the second small diameter portion 213. In addition, as shown in FIG. 21 which is the EE cross-sectional view of FIG. 20, between the inner peripheral surface 220 of the large-diameter portion 214 and the insertion portion 218, there is provided a material having a thickness substantially the same as that of the screen 203. The mesh-shaped flat plate-shaped mesh plate 219 ′ delivers the sand of the inner peripheral surface 22 of the large-diameter portion 214 to the inner peripheral surface 216 of the insertion portion 218 with the rotation of the cylindrical screen 204. Further, as shown in FIG. 20, a delivery plate 223 is provided on the inner peripheral surface 221 of the second small diameter portion 213 to deliver sand to the discharge port 222 side as the cylindrical screen 204 rotates. As shown in FIG. 19, a plurality of push-up plates 225 ′ are provided on the outer periphery of the cylindrical screen 2 04 to project outward in the radial direction and push the sand in the water tank 202 along the inclined wall portion 224 along with the aforementioned sand. Roll-up transmission member of 2008

457131 V. Description of the invention (3)-The position of the lower end of the circular movement path of the removal member 207 acting on 2-06 is located near the water surface in the water tank 202, and it is pushed up by the aforementioned push-up plate 225 Pull up the sand near the water. Then, the guide member 209 is coaxial with a plurality of support shafts 226 arranged at a certain interval along the unloading direction of the sand acting by the unloading member 207, and a roller with a guide groove is fixed at the middle portion in the axial direction. In addition, when the carrying-out member 207 is moved above the guide member 209, the protrusions on the lower side of the carrying-out member 207 are sequentially engaged with the guide groove, thereby regulating that the direction in which the sand is carried out intersects perpendicularly. Acting in this direction, the vibration from the vibration imparting device 210 is transmitted through the guide member, and the unloading member 207 is vibrated. [Problems to be Solved by the Invention] However, the conventional sand selection device 201 has the following problems. That is, as shown in FIG. 20, the aforementioned cylindrical sieve 204 has the inner peripheral surface 216 of the first small-diameter portion 212 and the large-diameter portion 214 on the contiguous portion between the first small-diameter portion 212 and the large-diameter portion 214. The inner side surface of the end wall 215 intersects slightly perpendicularly. When the sand and water supplied in the mixed state of the first small-diameter portion 21 2 move toward the large-diameter portion 214, it passes through the aforementioned end wall 21 4 of the large-diameter portion 21 4 The inner surface 21 7 is moved, so there is a problem that rapid movement of sand and water cannot be ensured. As shown in FIG. 21, the shape of the mesh plate 219 used to deliver sand from the inner peripheral surface 220 of the large-diameter portion 214 to the inner peripheral surface 221 of the second small-diameter portion 213 is a flat plate. When the cylindrical screen 204 is rotated and the inclination of the mesh plate 219 reaches a certain angle, the sand system falls linearly and is delivered to the second small-diameter portion 21 3. Therefore, the mesh plate 219 cannot fully meet the specifications. The sand of particle size will be sieved. A considerable amount of sand with the particle size within the specification will be mixed with the sand with the particle size outside the specification.

Page 6 457131 V. Description of the Invention (4) There is a problem when it is out of the water tank 202. Also 'as shown in FIG. 9', the circulation movement path of the removal member 207 and the hanging drive system of the above-mentioned sand removal and removal member 206, and the hanging transmission system are positioned near the water surface in the water tank 202, so as to push up ^ 225 f ^ The sand near the water surface is pulled up, but because of the sand, especially the larger particle size, it will immediately settle even if it is pushed up to the water surface, so the component 207 — & Very little 'and sand with a small sand diameter, so there is a problem β ^ ^^ In addition, the aforementioned guide member 209 is composed of a plurality of shafts 226 and rollers arranged at a certain interval, and these members and the carry-out member 2 〇? Because the vibration is transmitted without being successively engaged, the adjacent rollers and the pair of rollers cannot convey the vibration of the unloading member 207, and the vibration from the vibration imparting device 21 cannot be effectively generated. Will Shuang since moving out of the $ 207 drainage problem of effective drainage. In addition, the aforementioned guide member 209 is a member that is brought out by the unloading member 207, and it is composed of a plurality of pieces. Therefore, it is difficult to replace and the cost is high. The present invention has been made in view of the above-mentioned problems, and an object thereof is a sand selection device which can ensure the rapid movement of the sand inside the cylindrical screen, and can effectively implement the sand within the specification and the sand outside the specification. The selection of sand with granularity can be carried out in a large and uniform manner on the aforementioned sand selection device, and the vibration can be effectively transmitted to the carried-out member 'while maintaining the drainage function. Reality [Solutions of the problem] The specific methods for solving the aforementioned technical problems include the following

Page 7 457131 V. Description of Invention (5) *. That is, the "sand picking device according to item 1 of the scope of patent application" is characterized by including a "water tank; a cylindrical screen, which is roughly cylindrical, is arranged in the aforementioned water tank to be freely revolving", and water and sand are supplied from the supply port. The mixed state is supplied through the outer sieve 'to discharge the sand with the particle size within the specification to the aforementioned water tank'. At the same time, the sand with the particle size outside the specification is discharged from the water tank from the discharge port; the sand removal device has a winding on a plurality of transmission wheels. The continuous roll-up transmission member and a plurality of carrying-out members connected to the roll-up transmission member move the sand with the grain size within the specifications to the outside of the water tank; the guide has a linear shape and acts along the function of the aforementioned carry-out member. The sand carrying out direction is arranged linearly; the guide member is fixed on the lower surface of the carrying out member while being engaged with the guide rail to slide freely to regulate the movement of the carrying out member in a direction perpendicular to the carrying direction of the sand; Inclined grooves are disposed obliquely so as to cover the bottom of the guide rails and recover the water discharged from the carrying-out member: a vibration imparting device to make the aforementioned The orbit vibrates, and the vibration is imparted to the carrying-out member through the guide member β. The sand selection device described in item 2 of the patent application scope is in the configuration described in item 1 of the patent application scope. It is separated from the water tank, and is independently supported by a support member while the vibration imparting device is coupled to the inclined groove, and the guide rail is vibrated through the inclined groove. The sand selection device described in item 3 of the scope of patent application is in the structure described in item 1 of the scope of patent application, and is characterized in that a part of the cyclic movement path of the moving member acting by the aforementioned winding transmission member passes the aforementioned Below the cylindrical sieve. ° The sand selection device in the scope of patent application No. 4 is within the scope of patent application

457131

The structure described in item 1 is characterized in that the carrying-out member has a bottom wall and a back wall standing upright from the rear end of the bottom wall, and a plurality of drainage holes are provided on the bottom wall and the back wall, respectively. In addition, the drainage holes in the back wall are formed with leading portions inclined obliquely from the rear side toward the front side, so that the cross-sectional area of the drainage holes on the front side of the back wall is larger than that of the drainage holes on the rear side. The surface is large, and the carrying-out member is configured to move obliquely upward by the winding drive member in an inclined posture during carrying out. When carrying out, the introduction part of the drainage hole of the blame wall is oriented substantially vertically. . ^ The sand selection device described in item 5 of the scope of patent application is a patent application, and the features described in any one of items 1 to 4 are characterized in that a plurality of the aforementioned cylindrical screens are arranged in parallel. The sand selection device described in item 6 and item 7 of the scope of the patent application is in the structure described in any one of items 1 to 5 in the scope of the application. The aforementioned sand carrying device. And the cylindrical sieve described in item 8 of the scope of its application for patent is attached to the cylindrical sieve, and has a first small diameter portion with a supply port on one side of the shaft side, and the other side of the space has The second small-diameter portion of the discharge port is more than the above two ^ own large warp portion, which supports the first small-diameter portion and the second small-diameter portion to return to the first small percentage a and outside the large-diameter portion A screen is provided, which is characterized in that the continuity between the fin diameter portion and the large diameter portion has an inner peripheral surface portion from the first small diameter portion, and a “· conveying surface”, and is formed to protrude into the large diameter portion. The protruding stomach has a cylindrical insertion portion formed on the continuation portion between the second small-diameter portion and the large-diameter portion, and inserted into the large-diameter portion continuously with the silly portion and having the same diameter as the second small-diameter portion, ns ^ 1 The bending of the mesh with the same thickness as the aforementioned screen is 457131. V. Description of the invention (7) The arc-shaped mesh plate communicates with the inner peripheral surface of the large diameter part and the insertion part. The holes are connected to form a continuous conveying surface. The cylindrical sieve described in item 9 of the scope of patent application is included in the constitution of item 8 of the scope of patent application. 'It is characterized in that the screen system provided on the outer periphery of the large diameter portion is divided into a plurality of skeletons constituting the large diameter portion. In this case, the protruding portion is a protruding portion body having a cylindrical portion having the same diameter as the first small-diameter portion, and the protruding portion is provided at a position corresponding to the inside of the screen in the radial direction. The inclined conveying surface formed by the body expanding outward. The cylindrical sieve described in item 10 of the scope of patent application is the structure described in item 8 of the scope of patent application, and is characterized by one of the large diameter portion, the i-th small ridge portion, and the second small diameter portion. A plurality of manual delivery plates are provided on the inner peripheral surface of all or all of the inner peripheral surfaces, and the delivery surfaces are formed to deliver sand to the discharge port side with rotation. The sand selection device described in the scope of patent application No. 1, 12, 13, and 14 is in the scope of patent application! In the sand selection device described in any one of items 7 to 7, the cylindrical sieve has a first small-diameter portion having a supply port in the axial direction :: side and an axial direction. The other end side has: 2nd small diameter part, and a large diameter part located therebetween. The "", the diameter part and the ★ small diameter part are respectively supported to be freely revolving and are arranged around the large diameter part :: i 其It is characterized in that the continuation part of the first small diameter part and the large diameter part (two) has a continuous conveying surface from the first small diameter part and forms a large out # toward the dog in the large diameter part, and the second small diameter is described in the following The connecting part of the part and the gift part is formed on the second small-diameter part and the same diameter as the second small-diameter part is inserted into the 0-shaped insertion part in the large-diameter part, and at the same time, it has a mesh with the same thickness as the aforementioned screen.

Page 457131

A mesh screen that is continuous with the inner peripheral surface of the large-diameter portion and is formed to form a continuous conveying surface, and which is shaped as a hole and curved into an arc is connected to the communication hole of the insertion portion to form a cylindrical screen for use. The sand selection device described in the patent application No. 15, 16, 16, and 18 is in the sand selection device described in any one of the patent application scope Nos. VII to 7 In the cylinder, the cylindrical screen has a first small diameter portion having a supply port on one end side in the axial direction, a second small diameter portion having a discharge port on the other end side in the axial direction, and a large diameter portion located therebetween. The first small-diameter portion and the second small-diameter portion are supported to be freely revolvable and a screen is provided on the outer periphery of the large-diameter portion. A continuous conveyance surface from the first small-diameter portion is formed with a protruding portion projecting into the large-diameter portion; and a continuation portion between the second small-diameter portion and the large-diameter portion is formed continuously with the second small-diameter portion to communicate with the first small-diameter portion. 2Cylinder-shaped insertion part with the same diameter inserted into the large-diameter part, and a mesh plate having a mesh with the same thickness as the aforementioned screen and curved into an arc shape is within the aforementioned large-diameter part The peripheral surface and the communication hole provided in the insertion portion are connected to form a continuous conveying surface, and the protrusion portion is formed by The protruding portion body formed by the cylindrical portion having the same diameter as the first small diameter portion is conveyed at an angle formed by expanding the protruding portion body to the outside at a position corresponding to the inner side in the radial direction of the screen. surface. The sand selection device described in the 19th, 20th, 21st, and 22nd patent application scope is a sand selection device described in any one of the 1st to 7th patent application scope. In the sieve, the cylindrical sieve has a first small diameter portion having a supply port on one end side in the axial direction, and

457131 V. Description of the invention (9) ----- The second small-diameter part with the discharge port, and the large-diameter and second small-diameter part located therebetween are supported to be freely revolving and are provided in ^ 邱 1 』 The screen is characterized in that: the i-th small-diameter part and the second-large part are provided with a "Ϊ1 / diameter part ^ continuous moving surface and formed with a protrusion # protruding into the large-diameter part, and said second small-diameter part and the large-diameter part are formed. Of the Path

It is formed with a cylindrical inserting part inside it which continues to the second small diameter # and has the same diameter as the second small diameter part. '@ 时 有 有 粗 的 面 与 的 粗 ^ The mesh and t are curved into a circle The arc-shaped mesh plate is connected to the inner periphery of the large-diameter portion, and is connected to the communication hole provided in the insertion portion to form a continuous conveying surface. It is centered on the large-diameter portion, the first small-diameter portion, and the second small-diameter portion. A plurality of delivery plates are provided on the inner peripheral surface of one of the diameter portions and two of the diameter portions, and a delivery surface is formed to be delivered to the discharge port side. V [Embodiments of the invention] Embodiments of the invention will be described below with reference to the drawings. As shown in the figure below, 'the sand selection device 1 of this embodiment type includes a water tank 2; ^ cylindrical screen 9', the large diameter part 3 located at the middle part in the axial direction is arranged in the ^ tank 2 to rotate The first small-diameter ^ water supply port 5 on the one end side in the axial direction is freely shaped, and supplies sand and water in a mixed state, and 1 part 1 of the particle size within the specification is discharged through the screen 6 on the outer periphery of the large-diameter part 3 to the foregoing. Inside the water tank 2, ^ 7 is discharged from the outlet of the second small diameter portion 7 on the other end side in the axial direction to the outside of the water tank 2 and has a substantially cylindrical shape through the sand with an extra granularity; and a sand removal device row 17 It is a coiled transmission member 15 continuously coiled on a plurality of transmission wheels 10, 11'12, 13, 14 and a carrying-out member 16 connected to the number of the coiled transmission members 15, and the above-mentioned specifications are within the granularity. Sand moved out of the aforementioned

Page 12

45713i V. Description of the invention (10) 2 outside; guide rails 1 and 8 are linearly arranged along the direction of the sand acting on the carrying-out member 丨 6 and have a linear shape. The lower surface is engaged with the guide rail ^ freely and regulates the movement in a direction perpendicular to the direction in which the sand is carried out; the inclined groove 20 ′ is inclinedly configured to cover the underside of the guide rail 18 and recovered from the carrying out structure ㈣ The discharged water is transmitted to the device 2 and transmits vibrations to the guide rail 18, and the unloading member 16 is vibrated by the aforementioned means 19.冓 f ”Top view of the second and third states of the winding drive structure of the sand picking device 1. Shan Fu Shi i D_ About the structure of the cylindrical sieve 9. As shown in Figures 3 and 4, it is described in detail. _It is the same as the central part of the bone cross-sections \ character ring-shaped skeletons 22 and 23 with the following structure. "= Ring-shaped skeleton 24 with the same diameter as the first two ring-shaped skeletons 22 and 23 ... Shape: The middle part of the frame is provided with a ring 23, 24 protruding outward in the radial direction. The inner peripheral side is arranged in the inner peripheral direction of the large diameter part 3. For example, four long body-shaped linear skeleton epiphyses 22 are arranged. , 23, 24 鲇 鲇 a. ^ 叩 drink · eight W in the shape of a ring on each of the ring skeletons 22, 23, 24 = skeleton 26 is, for example, welded 22, 23, 24. The inner peripheral surface is integrated. The ring-shaped skeleton is connected to the first small-diameter portion 4 and the portion in the axial direction of the large-diameter portion 3, and constitutes an end wall on the side of the large-diameter portion 3 in the axial direction. One end portion 27 of the end wall, except the other end side, is connected to the second small diameter portion 7

457131 V. Description of the invention (11) The end wall 28 is formed by fixing annular plates that are drawn in the middle by concentric circles to the annular frames 22 and 23 of the large-diameter portion 3, respectively. As shown in FIG. 5 of the A-A cross-sectional view of FIG. 4, a sieve 6 formed by a mesh body which is bent and arc-shaped in cross section is installed on the outer side of the aforementioned skeleton structure. Further, a perforated iron plate bent freely and curved into a cross-section arc shape is mounted on the outer side so as to be parallel to the screen 6. ’

457】 31 Five 'invention description (12) The two vertical portions 34 of the two outer frames 33 facing each other are bent by bolts and nuts 35 which penetrate the holes provided in the bending portion 30 and the vertical portion 34 respectively. 30 is coupled to the vertical portion 34 so as to be separable. In addition, as shown in FIG. 4, both end portions in the axial direction of the screen 6 are in contact with the vertical portions 36 and 37 ′ of the ring-shaped skeleton 22 on the one end side or the ring-shaped skeleton 23 on the other end side and abut simultaneously. The ring of the central ring skeleton 24 is on one side of one of the protrusions 25. In the case where the aforementioned perforated iron plate 31 is mounted, the perforated iron plate 31 is formed in the same shape as the screen 6 and is installed in parallel from the outside of the screen 6. As shown in FIG. 3 and FIG. 8, the first small-diameter portion 4 and the second small rear portion 7 of the cylindrical screen 9 are respectively formed into a cylindrical shape, and are supported by the support members 38 and 39 in the aforementioned water tank 2 respectively. The support members 38 on one end of the cylindrical screen 9 on one end side in the axial direction of the two outer sides are respectively arranged on the one adjacent to the water tank 2 via the support 42 and the support shaft 43 so that the pair of grooved rollers 44 can rotate freely. On the base 41 of the side wall 40. Further, an annular protrusion 45 is formed on the outer periphery of the first small-diameter portion 4, and the grooved roller 44 is engaged with the annular protrusion 45 so as to rotate freely, thereby supporting the first rotation freely from both sides. The small-diameter portion 4 regulates the movement of the cylindrical screen 9 in the axial direction at the same time. Further, a driven key wheel 6 is provided on the outer periphery of the first small-diameter portion 4. A drive sprocket 48 is mounted on the output shaft of the i-th motor 47 of the rotary drive cylindrical screen 9. The drive sprocket 48 and the driven sprocket 46 are connected by a chain 49, and the first motor 47 is connected to the chain. 49 The cylindrical screen 9 is driven to rotate in the direction of arrow R. On the one hand, as shown in FIG. 3, the support member 39 on the other end side of the cylindrical screen 9 in the axial direction is respectively provided with the same support 42 and the support shaft 43 as those described above so that the pair of grooved rollers 44 can rotate freely. The method is arranged next to the sink 2

Page 15 457] 31 Five 'Explanation of the invention (13) -----' On the abutment 5 j on the other side wall 50, a ring-shaped protrusion 52 is formed on the outer periphery of the second small-diameter portion 7. The groove-shaped roller 44 is engaged with the annular protrusion 52 so as to rotate in a b-shape. The second small-diameter portion 7 is supported to rotate freely from both sides while regulating the axial direction of the cylindrical screen 9. As shown in FIG. 4, a supply port 5 is formed at an end portion on the side opposite to the large diameter portion 3 of the small diameter portion 4, and the supply port 5 is inserted into the first small diameter portion $. The chute member 53 ° & the chute member 53 is an article in which sand and water are supplied to the first small-diameter portion 4 in a mixed state from a concrete sand manufacturing device (not shown). As shown in Fig. 4 and Fig. 9 of the perspective view viewed from the direction of AA in Fig. 4, the first small path is formed on the connection and continuation of the first small-diameter part 4 and the large-diameter part 3. The inner peripheral surface of the portion has a continuous conveying surface 54 and a protruding portion 55 protruding from the large-diameter portion 3. With this, when the sand and water supplied from the aforementioned supply port 5 move inside the large light portion 3, they can descend from the front end of the protruding portion 5 5 and quickly reach the bottom surface of the large diameter portion 3. It is known that sand and water can be quickly moved from the first small-diameter portion 4 to the large-diameter portion 3 compared to the case where the sand and water are moved through the inner side surface of one of the end walls 27 of the large-control portion 3. The protruding portion 55 includes a protruding portion main body 56 formed of a cylindrical portion having the same diameter as the first small-diameter portion 4 and a position corresponding to an inner side of the screen 6 in the radial direction. The protruding body 56 has an inclined conveying surface 57 formed by expanding outward. The position corresponding to the inner side in the radial direction of the screen 6 corresponding to the inclined conveying surface 57 means that the inclined conveying surface 5 7 is aligned with the screen 6 when viewed from the rotation center of the protrusion 55. In a row, there are four places to match the aforementioned screens 6. With this, Chaoda

Page 16 457131 V. Description of the invention (14)

^ # 3 Most of the moving sand and water are gathered on the two inclined transports 26 :: The above mentioned screen 6 'because it hardly falls to the aforementioned straight bone', it can be more efficient Drain the coarse sand within the specification. μ towel, the continuation part of the second small-diameter part 7 and the small-diameter part 3 _ continued to the second small-diameter part 7 and inserted into the mountain diameter with the same diameter as the second small-diameter part 7: cylindrical shape inside The insertion section 58. A cover 59 is attached to the insertion portion 58 with a nut or the like. !! Also, as shown in FIG. 4 and FIG. 10 of the cross-sectional view of FIG. 4, the continuation part of 舲 2 i 卩 二 „卩 7 and the large part 3 has a shape slightly different from the aforementioned screen 6 = f degrees. The mesh plate 60 which is meshed and bent into an arc shape is provided as a communication hole with the inner peripheral surface of the large part 3 and the insertion part 58 described above. In order to connect one, a continuous conveying surface is formed. Here, the mesh plate 60 is fixed to each peripheral edge portion of a rectangular plate-shaped mesh body formed in a fixed shape so as to be formed of a metal plate or the like that is as thin as the month 'J J 师 网 6. The flexible support plate is formed as an article bent in the longitudinal direction. Here, two mesh plates 60 are provided from the inner peripheral surface of the large-diameter portion 3 through the outer periphery of the insertion portion 58. Surface: Those who form a continuous conveying surface. The inner side 6 of each mesh plate 60 is connected to a rectangular communication hole 6 provided on the insertion portion 58 so that the aforementioned conveying surface is communicated to the insertion portion. 58, and the end portion μ on the outer side in the radial direction is fixed to the aforementioned linear skeleton 26. At this time, the end portion 6 on the outer side in the radial direction of the mesh plate 60 is disposed in the relatively radial direction. The end portion 62 on the side is closer to the position in front of the rotation direction (direction of arrow R) of the circular screen 9. As a result, when the cylindrical screen 9 is rotated, the mesh of the mesh plate 60 is thicker than the above specification. The grain size of sand is introduced from the inner peripheral surface of the large-diameter portion 3 through the mesh plate 60.

457131 V. Description of the invention (15) The communication hole 61 is delivered into the insertion portion 58 (see FIG. Is). Also, the sand with the grain size within the specification returns to the inside of the large-diameter portion 3 through the mesh plate 60. In addition, as shown in the U view of the CC sectional view in FIG. 4, a side wall plate 64 is provided on the side end portion of the mesh plate 60 opposite to the other end wall 28 of the large diameter portion 3 on the side opposite to the large diameter portion 3. . The side wall plate 64 is formed into a plate-like body having a substantially circular arc shape with a wider outer side in the radial direction and a narrower inner side in the radial direction. The upper end edge of the side wall plate 64 is smaller than that of the mesh plate 60. The conveying surface is more protruded toward the inner side of the diameter direction, so as to form the side wall portion of the aforementioned conveying surface to prevent movement of the sand with an out-of-specification size on the conveying surface of the mesh plate 60 from the mesh plate 60. The side end portion is dropped into the large-diameter portion 3. As shown in FIG. 4, a conveyor belt 65 is disposed below the discharge port 8 of the second small-diameter portion 7. The conveyor belt 65 conveys sand of an out-of-specification size discharged from the cylindrical screen 9. As shown in FIGS. 4, 5, and 10, a plurality of delivery plates 66 are provided on the inner peripheral surface of the large-diameter portion 3, the first small-diameter portion 4, and the second small-diameter portion 7. A delivery surface 67 is formed on 66 to deliver sand to the discharge port 8 side as the rotation progresses. As shown in FIG. 12, the delivery plate 66 is a substantially rectangular plate-shaped body standing on the inner peripheral surface of the large-diameter portion 3, the first small-diameter portion 4, or the second small-diameter portion 7 as shown in FIG. 12 '. One of the surfaces forms the aforementioned delivery surface 67 β. The delivery surface 67 is arranged at an angle with respect to the rotation direction of the cylindrical screen 9, and the sand system is delivered to the aforementioned discharge port by a tilting movement along the delivery surface 67. 8 sides. Although not shown, a plurality of holes may be provided in the delivery surface 67 of the delivery plate 66. The opening size of the hole is set to be larger than the size of the mesh hole of the aforementioned screen 6 '. A rough sand screen can be implemented by passing or not passing the hole.

457131 V. Description of the invention (16) At the same time, only the sand with an out-of-specification size is quickly delivered to the 8th outlet. Next, a description will be given of the structure other than the cylindrical screen 9 of the sand selecting device 1 according to the present embodiment, such as the sand carrying out of Pei Chi 17. As shown in FIG. 1 and FIG. 2, the water tank 2 is an article formed into a long and slightly cubic shape in the longitudinal direction of the sand selection device 1, that is, in the length direction, and has a larger diameter portion than the aforementioned cylindrical Xue 9 The length of 3 is large and wide. The water tank 2 has a drainage hole 69 on the front wall 68, which adjusts the height of the water surface in the water tank 2 to be constant. In addition, an inclined surface 70 is formed near the rear end of the water tank 2. The inclined surface 70 constitutes the rear end wall of the water tank 2. The rotary screen system and the water tank of the cylindrical screen 9 are slightly forward of the center of the water tank 2. The horizontal width direction of 2 is parallel, and the system of the large-diameter portion 3 is immersed in the water in the water tank 2. 1 is equipped with the sand conveying device just described. 17 is a continuous roll drive member 15 wound on a plurality of transmission wheels, ^ μ ^ me 13 14 and a plurality of carry out members connected to the roll drive member 15 16. With the carrying member 16 2 discharged from the cylindrical sieve into the water tank 2, the sand with the particle size within the foregoing specification is picked up and carried out of the water tank 2. The plurality of transmission wheels 10, U, 12, 13, and 14 include: a pair of two sprocket wheels arranged in two to form a pair, and supporting the slewing ring on the side of the water tank 2, 5Q, And the lower part is a pair of first sprocket 10 in one of the waters in the next two 22; the rotary cymbals are supported on the side walls 40, 50 of the above-mentioned cylindrical sieve 9 and the water tank 2, and the barrel sieve 9 is in the water in the water tank 2 -The second sprocket " right and left are adjacent to the square and the rear of the circle, and adjacent to the outside of the side walls 40, 50 of the water tank 2-right! Support and second pillar 74

Page 19 457131 V. Description of the invention (18) A plurality of unloading members 16 are installed at regular intervals on the pair of winding drive members 15 at a certain interval. As shown in FIG. 13 and FIG. 14, the carrying-out member 16 is formed of a synthetic resin or the like with a bottom wall 87 and a back wall 88 ′ standing upright from the rear end of the bottom wall 87 and a pair of left and right side walls 89. A plurality of ribs 90 are integrally provided between the two side walls 89. The ribs 90 are connected to the bottom wall 87 and the back wall 88 to form a wall portion parallel to the side walls 89. In addition, a plurality of drainage holes 91 are formed in the bottom wall 87. At the same time, a plurality of drainage holes 92 are also formed in the back wall 88. As shown in FIG. 15, the drainage holes 92 of the back wall 88 are attached to the upper edge portion. An introduction portion inclined obliquely upward from the rear side toward the front side is formed so that the cross-sectional area of the drainage hole 92 on the front side of the back wall 88 is larger than the cross-sectional area of the rear side drainage hole ⑽. The guide portion 114 is formed so that the V is moved when J is moved; the countersink 16 is oriented substantially in a vertical direction in an inclined state shown in FIG. 15. On the one hand, the drainage hole 91 of the bottom wall 87 is generally formed in a circular hole shape. The carrying-out member 16 is connected to the winding driving member 15 via a supporting member 93. That is, as shown in FIG. 13 and FIG. 14, the supporting member 93 is connected to the upper ends of the front and rear pair of zigzag members 94 and 95 by a pair of left and right linear skeletons 96 and to the zigzag member 94 at the same time. A pair of left and right mounting plates 97 are fixed to the front of the upper surface of the linear skeleton 96 j to connect the left and right transmission members 15. Each of the mounting plates 97 is followed by a winding drive member 15 respectively. Further, the lower end portion of the front chevron-shaped member 94 is connected to the bottom wall 87, and the rear chevron-shaped member 95 is connected to the back wall 88, whereby the supporting member 93 is fixed into one body. In addition, a metal introduction plate 98 is installed at the front end of the "bottom wall" to guide the sand deposited on the bottom surface of the water tank 2 to the carrying member.

P.21 457131 Five descriptions of the invention (19) ^ Inside, an inclined portion inclined downward is formed on the front end of the introduction plate 98 as shown in FIG. 14. There are rails parallel to these components that are regulated and engaged with the guide rails described below. ^ ^ ^ For the sand thrower A 1 f machine 1 δ the sliding phase of the vertical hanging transmission member 15 is different. The action of carrying out the member 16. These guide members 19: Figure = top and bottom of trapezoidal two, which is the direction in which sand is carried out :: shown in Figure 16 of the figure, 'The trapezoidal groove 10 is formed from the guide rail and the length of the core member 19 is formed as It is slightly the same as the length in the front-rear direction of the previously carried-out member = wall 87. K of the guide member 19: It is particularly limited ', but it uses a material J / which has better abrasion resistance and elasticity. = If abrasion-resistant rubber or abrasion-resistant synthetic resin can be used. The reason why it is better for people to prevent radon is to be able to vibrate the above-mentioned guide 18: to prevent the noise caused by the conflict between the guide member 19 engaged with it Rt 所示 1 and 2 The rail 18 is composed of a linear shape arranged in a straight line along the direction in which the sand used for carrying out the medium 4 is carried out. Here, the aforementioned carrying out member 16 is connected to the winding drive member ^ the second sprocket 11 described above. On the part connected to the third sprocket 12, the sand in the water tank 2 is moved out by moving obliquely rearward and upward from the rear end of the amusement water tank 2 ^ j = The “moving-out direction” means a direction that moves parallel to a portion of the second sprocket 11 and the third sprocket 12 that are connected to the winding drive member 15 and moves diagonally rearward and upward. for

457 t 3l V. Description of the invention (20) 'This' The aforementioned guide rail 18 is below the part of the second sprocket 11 and the third sprocket 12 which is connected to the aforementioned winding transmission member 15, from the rear end of the aforementioned water tank 2. The vicinity of the part is linearly extended obliquely rearward and upward so that it is parallel to the winding drive member 15 of the aforementioned part. The guide rail 18 is composed of an elongated rectangular flat plate of a certain thickness, and is arranged such that one end edge in the width direction is the upper surface, that is, the sliding surface with the guide member 19 is arranged vertically. In addition, two guide rails 18 are arranged in parallel with an interval equal to the interval between the two guide members 9 provided on one carry-out member 16 to engage the guide 19 described above. Here, the guide rail 18 is fixed to the inside of the inclined tank 20 and arranged at a predetermined position as described later, and has a length from the vicinity of the rear end of the water tank 2 to the vicinity of the hopper 81. As shown in Fig. 1 and Fig. 2, the aforementioned "sloping groove 20" is arranged obliquely so as to cover the lower part of the guide rail 18 and recover the water discharged from the carrying member. Specifically, the 'inclined groove 20' is a groove-shaped member having a cross-section in the shape of a cross-section, and has a slightly longer length than the above-mentioned guide rail 18. As shown in Fig. 16, it has a larger width than the width of the unloading member a. A guide rail 18 is fixed inside the inclined groove 20. The fixed structure of the guide rail 18 is as follows. That is, as shown in FIGS. 1 and 16, a plurality of shaft insertion holes ιοί are formed on the guide rail 18 at a certain interval, and a plurality of support shafts 102 are inserted into the shaft insertion holes 101. Both ends of the support shaft 102 are fixed to the side walls 10 on both sides of the inclined groove 20 respectively, whereby the guide rail 18 is fixed to the inclined groove 20. In addition, between the side walls 103 on both sides of the inclined groove 20 and the aforementioned guide rail 18 and between the two guide rails 18, the support shaft

Page 23 457ί 3 Description of the invention (21) 102 A cylindrical stopper 104 is fitted on the outside to implement the positioning in the right direction of the aforementioned guide rail. Also, the aforementioned fixation of the inclined groove 20 of the support shaft 102 is formed on both ends of the support shaft 102 to form a male thread 105, and the side walls of the inclined groove 20 respectively form shaft fixing holes 106, in these holes 1 〇6 The two ends of the support shaft 102 are inserted through the male screw 105 on the outside of the male screw 105 protruding outside the inclined groove 20, and the nut 10 is implemented.

V. Description of the invention (22) = Inclined groove 20 'Because the vibration does not transmit to a wide range, the aforementioned guide rail 18 can be effectively vibrated.' The aforementioned supporting frame 109 fixed to the inclined groove 20 can be extended and adjusted: adjustment The line 113 and the above-mentioned support beam 7 two 7 = ten or more. The vibration-proof member 1 10 is fixed to the inclined groove 20, and can be easily released by fitting the support pillar ill from above. . ^ By shortening the aforementioned line 113 by the adjusting mechanism and lifting the inclined groove 20 upward, the inclined groove 20 and the anti-vibration member 110 are separated from the support column lu. When the support column ιn is moved to another place thereafter, the inclined groove 20 can be easily lowered to the floor surface, and the maintenance of the guide 18 and the like can be performed. On the sand selection device 1 related to this embodiment, the aforementioned cylindrical screen 9 and the aforementioned sand removal device 17 are respectively provided, but the cylindrical screen 9 and the sand can be added when the processing capacity of the sand selection device j is increased. A plurality of selecting devices 8 are arranged in parallel. The following describes the operation of the sand selection device having the aforementioned structure. Β First, the sand classification operation using the cylindrical sieve 9 will be described. As shown in FIG. 3 and FIG. 8, the cylindrical sieve 9 is operated by the first motor as shown in FIG. 3 and FIG. 8. 47 is driven to rotate in the direction of an arrow R via a driving sprocket 48, a key bar 49, and a driven sprocket 46 on the first small-diameter portion 4. In this state, sand and water are supplied into the first small-diameter portion 4 of the cylindrical sieve 9 through a slide channel member 53 from a concrete sand manufacturing apparatus (not shown) and the like. The sand and water system introduced into the first small-diameter portion 4 are moved to the large-diameter portion 3 side by the delivery plate 66, and fall from the front end of the protruding portion 55 to the bottom of the large-diameter portion 3 (see FIG. 4). Thereafter, as the large-diameter portion 3 rotates, as shown in FIG. 17, when the outer screen 6 and the perforated iron plate 31 are provided, the passage passes

Page 25 4 5 7 1 3 1 V. Description of the invention (23) The circular holes 32 of the open-hole iron plate 31 discharge the sand S1 and water with the particle size within the specifications through the mesh of the screen 6 Inside the sink 2. Here, because a delivery plate 66 is provided on the inner peripheral surface of the large fe portion 3, sand and water can be mixed by the delivery plate 6 6 to promote the discharge of the sand S1 with the particle size within the foregoing specifications, and cannot pass through. The out-of-size sand s 2 of the screen 6 is quickly delivered to the second small-diameter portion 7 side. Moreover, when the perforated iron plate 31 is coated on the outer side of the screen 6, the screen 6 can be prevented from being damaged by the outer side. As shown in FIG. 18, 'the sand system reaching the discharge side end portion of the large-diameter portion 3 and the continuation portion of the second small-diameter portion 7 was pulled up by the mesh plate 60 with the rotation of the large-diameter portion 3. The mesh plate 60 has the same size of the mesh as the aforementioned screen 6, so the sand S1 with the granularity within the specification falls through the mesh plate 60 to the bottom in the large-diameter portion 3, and is soon passed through the mesh 6 Drain into the water tank 2. Here, the aforementioned mesh plate 60 has a shape curved into an arc shape, and its inclination angle is along a circular solitary shape, and the shape gradually descends downward. Therefore, the sand moved thereon by the mesh plate is pulled up along with the circle. When the sieve 9 rotates downward, the moving speed becomes slower in the part where the inclination angle is relatively gentle, and it becomes a state of moving little by little. Moreover, the moving distance is longer than the case where the conventional mesh plate 60 is flat. Therefore, the efficiency of re-sieving the sand S1 with the particle size within the specification can be improved. On the one hand, the sand of out-of-specification size, that is, the sand larger than the mesh of the mesh plate 60, is pulled out by the mesh plate 60 and moves downward with the rotation of the large-diameter portion 3 through the communication hole. 61 is dropped into the insertion portion 58 from the "self-insertion portion" by the delivery plate 66 to the discharge port 8 of the second small-diameter portion 7, and from the discharge port 8 is discharged to the conveyor belt 65 outside the cylindrical screen 9. (Refer to Fig. 4) There is a pull-only gauge on the connection between the second small-diameter part and the large-diameter part.

Page 26 457131 V. Description of the invention (24) The mesh plate 60 of the sand S2 with an extra grain size is fed into the second small-diameter portion 7 through the insertion portion 5 8 through the sand S2 with an extra grain size, so it can be smooth. The discharge operation of the sand S2 with an out-of-specification size is carried out. Even if the sand 81 with the grain size within the specification is dropped by the mesh plate to the bottom side of the large-diameter portion 3 because of the mesh of the mesh plate 60, the sand S1 with the grain size within the specification has few from the second small diameter. The part 7 side is discharged. Next, the operation of removing the sand s1 within the specification from the water tank 2 will be described. As shown in FIG. 1, the height of the water surface in the water tank 2 is maintained constant by the drainage hole 69 provided in the front wall 68, and the aforementioned cylindrical screen 9 is configured so as to immerse the lower portion of the large diameter portion 3 The height in the water tank 2 is supplied to the cylinder. The sand system in 9 and the water supplied at the same time are immersed in the water in the water tank 2. This improves the flowability and promotes separation. Improve screening efficiency. On the one hand, the second motor 79 on the support beam 77 rotates the third sprocket 12 through the driving sprocket 84, the driving chain 86, and the driven sprocket 85, whereby the winding transmission member 15 is wound on the The first to fifth sprocket wheels 10, 丨 丨, 12, 1, 3, and 14 are cyclically driven. Each carrying-out member 16 mounted on the winding transmission member 15 corresponds to the cyclic driving of the winding transmission member 15 from the front side of the first sprocket 10 and is immersed in the water tank 2 and passed under the aforementioned cylindrical screen 9 . At this time, the member 16 'is carried out, and the sand 31 discharged from the cylindrical sieve 9 and the sand si which has fallen and accumulated at the bottom of the 7 tank 2 are picked up and housed therein. Since the lead-in plate 98 (refer to FIG. 13) is attached to the front end of the carrying-out member 6, the sand μ is taken into the carrying-out member 6 in a round shape. Wan—When the lead-in board 98 is damaged, only the lead-in board 98 can be replaced.

Page 27 V. Description of the invention (25) --- Thereafter, the carrying-out member 16 containing the sand si is exposed to the second sprocket 11 and the third key wheel 12 through its second sprocket.系 j '系 被 导 __ and moved diagonally backward from the rear end of the water tank 2. At this time,'% shown in Figure 16, the guide member 19 fixed to the lower surface of the carrying member 16 is engaged Sliding on one side of the aforementioned guide 丨 8, thereby regulating the movement of the carrying-out member 16 which is perpendicular to the moving direction of the carrying-out member 丨 6. In addition, the vibration motor 74 of the vibration imparting device 21 is provided through the inclined groove. 20. Vibration is transmitted to the guide rails 18, and vibrations are imparted to each carrying-out member 16 via a guide member 19 therefrom, whereby the carrying-out member 16 can be vibrated to pass through the drainage holes 91, 92 of the bottom wall μ and the back wall, Mandatory drainage is carried out from the carrying-out member 16. In this case, as described above, the carrying-out member 16 is inclined at the inclined groove 20 so that the lead-in portion 114 of the drainage hole 92 of the back wall 88 faces a substantially vertical direction, which is more effective. The drainage of the self-drainage hole 92 is implemented, and it is not easy to block the drainage hole 92 The water discharged from the carrying-out member i 6 flows on the inside surface of the inclined groove 20 arranged below the guide rail 18, and falls from the square end 112 to the rear end constituting the water tank 2. The inclined surface 70 ′ of the wall returns to the water tank 2 from there. The carrying-out member 16 that reaches the third sprocket 12 through the guide rail 18 is in an upside-down posture above the third sprocket 12, thereby making the specification within The granular sand S1 falls into the hopper 81 and is discharged. 'This sand M is discharged from the hopper M by the conveyor belt 82. The final removal member 16 of the sand S1 is passed through the third sprocket 12, the fourth sprocket 13 and The fifth sprocket 14 is immersed in the water in the water tank 2 again from the front side of the first sprocket 10 to perform a downward stroke and is in the water tank 2

Page 28 457131 Description of the Five 'Invention (26) The sand S1 is lifted again. [Effects of the invention] As can be seen from the above description, the decoration is selected according to the sand related to the item of the present invention, and the ω _ r kisses the profit-seeking range. The first sand and the sand with an out-of-specification size are given to the knife. The effect of the separation of the particle size within the specification; the grid: the water contained in the sand of the particle size should be moved in a straight line to arrange the straightness ... J: the lower surface of the sand out of the component and the heat of the people, +. Vanadium Xingguo Yu Yuda moved. Yu then said the guide rails can be slid and super-manufactured the disk. # The sand's removal direction is vertical / moving, and the guide member is regulated to the front. Structure = Operational vibration of the weighed part can be moved by the vibration imparting device ^ σ, and often conveys 1 pair of pairs efficiently to the unloading member # Λ, so it can effectively implement the role of drainage of the unloading member. It covers the water discharged from the inclined member below the guide rail and returns to the water tank. In addition to the above-mentioned effects, the sand selection device that has been blown out from the front passage is separated from the aforementioned water tank to support the component and imparts the vibration to the device. 'Ί: ίί =' bord ' Since the vibration imparted by the vibration imparting device is transmitted to the unloading member, there is an advantage that noise generated by the vibration can be reduced. According to the sand selection device according to item 3 of the scope of patent application of the present invention, in addition to the above-mentioned results, a part of the circulation movement path of the ㈣ member in the material roll hanging structure # passes through the lower part of the aforementioned cylindrical screen, thereby , Moving out of components

Page 29 457131 V. Description of the invention (27) The sand that has been discharged from the cylinder sieve and the sand that has already fallen and accumulated at the bottom of the water tank can be pulled up and contained in it, so that a large amount of sand can be pulled up reliably. In addition, because the particle size of the sand picked up by an uninformed person tends to be smaller, it is possible to remove a large amount of uniform sand. According to the sand selection device according to item 4 of the patent application scope of the present invention, in addition to the foregoing effects, the carrying-out member has a bottom wall and a back wall standing upright from the rear end of the bottom wall, and these bottom walls and back walls A plurality of drainage holes are respectively provided on the upper side of the drainage holes of the back wall, and an introduction portion inclined obliquely upward from the rear side to the front side is formed, so that the cross-sectional area of the drainage holes on the front side of the back wall is smaller. The cross-sectional area of the drainage hole on the rear side is large, and the carrying-out member is configured to move the oblique upward movement of the winding drive member in an inclined posture when carrying out, so that the drainage hole of the back wall is introduced when carrying out. The part is oriented in a substantially vertical direction, so that when sand is carried out obliquely upward by the carrying-out member, the water system near the back wall of the carrying-out member is smoothly introduced into the drainage hole through the introduction part, and since then # 水The hole is drained, so it has the advantage of improving the drainage efficiency.

According to the sand selection device according to item 5 of the scope of patent application of the present invention, in addition to the foregoing effects, by arranging a plurality of the aforementioned cylindrical screens in parallel, a larger amount of sand can be separated into sand with an internal particle size and sand with an external particle size. Significantly increase the processing capacity of the sand selection device D According to the invention, the sand selection device of the 6th or 7th in the patent application scope, in addition to the aforementioned effects, by arranging a plurality of the aforementioned sand removal devices in parallel, a larger amount of sand The water tank is moved out to drain water, which can greatly increase the processing capacity of the sand selection device.

Five 'invention description (28) According to the cylindrical sieve of item 8 of the scope of patent application, the continuous portion of the first small-diameter portion and the large-diameter portion is continuously transported from the inner peripheral surface of the first small-diameter portion. The protruding portion provided facing toward the large-diameter portion, and when the sand and water supplied from the supply port of the i-th small-diameter portion moves toward the large-diameter portion, it is dropped from the front end of the protruding portion and can reach the large diameter immediately. Underneath the surface, it is possible to quickly move sand and water when the sand and water are moved along the inner side of one end wall of the large-diameter part. In addition, a cylindrical insertion portion that is continuous with the second small-diameter portion and has the same diameter as the second small-diameter portion and is inserted into the large-diameter portion is formed on the continuation portion of the second small-diameter portion and the large-diameter portion. An arc-shaped mesh plate having mesh holes having the same thickness as the aforementioned Xue ^ is connected to the inner peripheral surface of the large-diameter portion and a communication hole provided in the insertion portion to form a continuous transport surface. Therefore, the sand moved by the mesh plate is moved along with the rotation of the cylindrical screen from the part with the steeper inclination angle to the part with the gentler inclination angle, and it is more familiar than the conventional net. In the case of the flat plate shape of the plate, it can move a longer distance, so the sand with the particle size within the specification can be dropped again with high efficiency. In addition to Qiaoxuan's cylindrical sieve according to item 9 of the scope of Shenqing Patent, in addition to the aforementioned effects, the sieve set on the outer periphery of the large diameter section just described is divided into a plurality by the skeleton constituting the large diameter section: at this time, the aforementioned protrusion The part has a protruding body formed by a cylindrical portion having the same diameter as the aforementioned small diameter portion, and the protruding body is expanded outward at a position corresponding to the inner side of the screen in the radial direction. The inclined conveying surface formed by the opening, whereby the large portion of sand and water moving toward the large-diameter portion gathers on the inclined conveying surface and falls onto the screen, because it hardly falls onto the frame. It can discharge the particle size within the specifications more efficiently on page 31 457131 V. Description of the invention (29) Sand. According to the cylindrical sieve according to item 10 of the scope of patent application, in addition to the aforementioned effects, a part or all of the above-mentioned large-diameter portion, the first small-diameter portion, and the second small-diameter portion are formed by being provided on the inner peripheral surface. With the rotation, the sand is delivered to the multiple delivery plates on the delivery surface on the discharge side. Inside the cylindrical sieve, sand and water can be sent to the discharge outlet at a certain speed j. Then 'thereby preventing sand from accumulating in one place. The obstruction of the flow ^ sunny 4 β, especially in the large diameter section, the aforementioned delivery plate can play the role of sand = water k and stir, so the screening efficiency using the aforementioned screen can be improved. According to the towel of the present invention Please apply for the scope of the patent No. 1 item, No. 12, No. 13 item, or No. 5 item; choose S to install, in addition to the effect of the sand selection device described above, you can add to apply for patent 笳 囹 筮 β Zhuang class worship The sand of the aforementioned effect of the cylindrical sieve of item 8 is selected and set. 1 8 Ji: In addition to the above-mentioned effects, the sand selection device of the 15th, 16th, 17th or 17th scope of the patent application scope of Ming Ming applies ^ to select the circle containing the 9th scope of the patent application Sand screening for the aforementioned effects of the tube sieve: scope item 19, item 2. In addition to the aforementioned effects, the “Shan Zhi Zhi Zhi Yi®” and “Sand Picking Device” of item 1, item 21 or item 22 can also be made to have “A” in the range of insults and benefits 1 士 @ 士 _ Ra. The sand selection of the aforementioned effect of the cylindrical sieve related to the item [Simplified description of the drawing] The first picture is the picture of the road and the sun + 隹 _. Section of sand selection device related to implementation type

571 31 V. Description of the invention (30) The second figure is a top view of a state in which the driving member and the carrying member are omitted from the sand selection device related to this embodiment. Fig. 3 is a front view of a cylindrical sieve according to the embodiment. Fig. 4 is a sectional view of a cylindrical sieve according to the embodiment. Fig. 5 is a sectional view taken along the line A-A in Fig. 4. FIG. 6 is a perspective view of a screen of a cylindrical screen related to the embodiment. Fig. 7 is a perspective view of a perforated iron plate of a cylindrical sieve according to the embodiment. Fig. 8 is a side view of the cylindrical sieve according to the embodiment as viewed from the supply port side. FIG. 9 is a perspective view viewed from the direction A-A of FIG. 4. Fig. 10 is a sectional view taken along the line B-B in Fig. 4. Fig. 11 is a sectional view taken along the line C-C in Fig. 4. Fig. 12 is a perspective view of a delivery plate of a cylindrical sieve according to the embodiment. Fig. 13 is a top perspective view of a carrying-out member of the sand carrying-out device according to the embodiment. Fig. 14 is a bottom perspective view of a carrying-out member of the sand carrying-out device according to the embodiment. Fig. 15 is a sectional view of a carrying-out member of the sand carrying-out device according to the embodiment. Fig. 16 is a sectional view taken along the line D-D in Fig. 1; Fig. 17 is a sectional view taken along the line A-A of Fig. 4 in use. Fig. 18 is a B-B sectional view of Fig. 4 in use.

Page 33 57131 V. Description of the invention (31) Figure 19 is a cross-sectional view of a conventional sand selection device. Fig. 20 is a sectional view of a cylindrical sieve of the conventional example. Figure 21 is a sectional view of Figure 20. [Symbol description] 1, 201 ~ sand selection device; 2,202 ~ sink; 3,214 ~ large warp section; 4,212 ~ first small diameter section; 5 ~ supply port; 6'203 ~ sieve screen; 7, 213 2nd small diameter part; 8, 222 ~ discharge port; g, 204 ~ cylindrical sieve; 、 13, 14, 205 ~ drive wheel; 15, 206 ~ coiled drive member: 〇07 ~ unloading member ; 17,208 ~ sand unloading device; 18 ~ rail;: Guiding member; 20 ~ inclined groove; 21,21〇 ~ vibration imparting device ~ 'an / 23,24 ~ ring frame; 25,45,52 ~ Ring-shaped protrusions; 26, # #skeleton; 27 ~ end; 28 ~ the other end; 29 ~ support plate; 30 ... curved «'3 open hole iron plate; 32 ~ round hole; 33 ~ outer skeleton; 34, 36, = vertical portion; 35 ~ bolts and nuts; 38, 39, 83, 93, 108, j holding members; 40, 50 called Zebi; 41, 5 abutment; 42 ~ support people ~ Supporting shafts; 44 ~ groove rollers; 46, 85 ~ driven sprocket ^ Budgong: .y48 84 ~ drive sprocket; 49, 86 ~ chain; 53 ~ slideway structure 218 'handle, 57 ~ conveying surface 55 ~ protruding part; 56 ~ protruding part body; 58, ~~ insertion part; 59 ~ cover body; 60,219 ~ Shaped plate; 6 b communicating holes; 221 talk ~, end; 64 ~ side wall plate; 65, 82 ~ conveyor belt; 66, # &. 1 delivery plate; 6 b delivery surface; 68 ~ front wall; 69 ~ drain hole; 70 ~ tilt 9, 7, 72, 75, 76, 78, rotary shaft; 73 ~ 1st branch; 74 ~ bucket: '77 ~ support beam; 79 ~ 2nd motor; 80 ~ 3rd pillar; 8 bottom wall; 8 8 ~ back wall; 8 9 side wall; 9 0 ~ rib; 91, 9 2 ~ row

^ 7131 V. Description of the invention (32) Water hole; 94, 95 ~ 匚 -shaped member; 97 ~ Mounting plate; 98 ~ Introduction plate; 99 ~ Inclined part; 10 shaft insertion hole; 102 ~ Support shaft; 1 03 ~ Side wall; 104 ~ stopper; 105 ~ male thread; 106 ~ hole for shaft fixing; 107 ~ nut; 10 ~ support frame; i1 0 ~ anti-vibration member; 1 1 1 ~ Supporting post; 1 1 end; 1 i 3 ~ line; 114 ~ lead-in; 215 ~ end wall; 216 ~ inner peripheral surface; 217 ~ inner side surface; 221 ~ inner peripheral surface; 224 ~ inclined wall portion; 225 ~ Push up the board; 226 ~ fulcrum; S 1 ~ sand with internal particle size; S 2 ~ sand with external particle size.

Page 35

Claims (1)

4 5713 1 VI. Patent application scope 1, a sand selection device, including: a water tank; a cylindrical sieve, which is roughly cylindrical, is placed in the aforementioned water tank and is configured to return # freely, and mix water and sand from the supply port. The state of supply is provided, and the sand with the particle size within the specification is discharged into the aforementioned water tank through the outer screen. At the same time, the sand with the particle size outside the specification is discharged out of the water tank from the discharge port; the sand removing device has a coil hanging on a plurality of transmission wheels. The continuous roll-up transmission member and a plurality of carry-out components connected to the roll-up transmission member move the sand with the grain size within the specifications to the outside of the water tank; the guide rail has a linear shape and is carried out along the function of the aforementioned carry-out member The direction is arranged linearly; v _ The guide member is fixed on the lower surface of the carrying-out member while engaging with the guide rail to slide freely to regulate the movement of the carrying-out member in the direction intersecting with the moving of the sand ^ A vertical inclined groove, which is obliquely configured to cover the water discharged from the carrying-out member under the guide; and a rectangular shape that recovers from the vibration imparting device, The vibration guide 'and the unloading member for imparting vibration member. Do not mention the guide structure 2. As described in the scope of the patent application, the sand is selected to install the inclined tank separated from the water tank to support the structure device 'where the aforementioned vibration imparting device is combined with the aforementioned tilt ::: support' The aforementioned guide rail is vibrated. The process of carrying out the component through the inclined groove Mining road Page 36 457131 6. Scope of patent application Partly passed under the aforementioned cylindrical sieve. 4, as described in item 丨 of the scope of the patent application: the carrying-out member has a bottom wall and a guide unit from which the upper edge of the drainage holes of the front wall ^ is formed into a plurality of drainage holes. ， # #The rear side is inclined obliquely toward the front side < import. p 'Make the front of the back wall older than the age of the drainage holes on the rear side + The cross-sectional area of the drainage holes is large when the unloading is carried out', and the unloading member is dynamic, πβίΐψ Tilt posture shifted upwards obliquely = Straight = when moving out 'The introduction part of the drainage hole on the back wall is generally facing the top 5 as described in the first, second, third or fourth item of the patent scope / Selection device, wherein a plurality of the aforementioned cylindrical sieves are arranged in parallel. Evening recognition, as described in item 1, 2, 3, or 4 of the patent scope, the selection device, in which a plurality of the aforementioned sand removal devices are arranged in parallel. • The sand selection and placement device as described in item 5 of the patent claim scope, in which the brigade is equipped with a plurality of the aforementioned sand removal devices. 、 / · —The kind of round-shaped sieve 'has a first small diameter portion with a supply port on one end side in the axial direction' and a second small diameter portion with a discharge port on the other end side in the axial direction. There is a large-diameter portion between the small-diameter portion and the second small-diameter portion to support free rotation, and a screen is provided on the outer periphery of the large-diameter portion, which is characterized in that the first small-diameter portion and the large-diameter portion are large. The continuous part of the diameter part has a continuous conveying surface from the inner peripheral surface of the first small diameter part, and a protruding part is formed to protrude into the large diameter part; Page 37 4 57 1 3 1 VI. Patent application scope The continuous portion of the second small diameter portion and the large diameter portion is formed on the continuation of the second small diameter portion and inserted into the large diameter with the same diameter as the second small diameter portion. The cylindrical insertion part in the part, and the mesh plate with a curved arc shape having meshes with the same thickness as the aforementioned screen, are arranged on the inner peripheral surface of the large-diameter part and the insertion part. The communication holes are connected to form a continuous conveying surface. 9. If the cylindrical sieve described in item 8 of the scope of patent application, wherein the screen provided on the outer periphery of the large-diameter portion is divided into plural by the skeleton constituting the large-diameter portion, the protruding portion is The protruding portion body formed by the cylindrical portion of the same diameter as the first small diameter portion is conveyed at an angle formed by expanding the protruding portion body to the outside at a position corresponding to the inner side in the radial direction of the screen. surface. 10. The cylindrical sieve according to item 8 of the scope of the patent application, wherein a plurality of inner perimeter surfaces are provided on part or all of the large diameter portion, the first small diameter portion, and the second small diameter portion. The delivery plate is formed with a delivery surface that turns around to deliver sand toward the discharge port side. 11. The sand selection device described in item 1, 2, 3, or 4 of the scope of patent application is in a cylindrical sieve, and the cylindrical sieve has a 1 small-diameter portion, a second small-diameter portion having a discharge port on the other end side in the axial direction, and a large-diameter portion located therebetween, and the first small-diameter portion and the second small-diameter portion are supported to rotate freely and Λ has a screen outside the large-diameter part, ° Among which, the continuation part between the first small-diameter part and the large-diameter part has a continuous conveying surface from the i-th small-diameter part and a protrusion protruding into the large-diameter part is formed Big out Page 457131 ___ ______ Six 'Lifan® ^ On the continuity between the second small diameter part and the large diameter part, an insertion large diameter continuous to the second small control part and the same diameter as the second small diameter part is formed. The cylindrical insertion part in the part also has a mesh plate with a mesh thickness that is slightly the same as that of the aforementioned screen, and a mesh plate curved into an arc shape is in communication with the inner peripheral surface of the large-diameter part and the insertion part. The holes are connected to form a continuous conveying surface, and a cylindrical screen is formed for use. 1 2 · The sand selection device described in item 5 of the scope of the patent application is “in a cylindrical sieve”, and the cylindrical sieve has a first small-diameter portion having a supply port on one end side in the axial direction, and is different from the other in the axial direction. The second small-diameter portion having a discharge port on the end side and the large-diameter portion located therebetween, the first small-diameter portion and the second small-diameter portion are respectively supported to be rotatable and a screen is provided on the outer periphery of the large-diameter portion. Among them, the continuation portion between the first small diameter portion and the large diameter portion has a continuous conveying surface from the first small diameter portion and a protruding portion protruding into the large diameter portion is formed; The continuation part of the diameter part is formed with a cylindrical insertion part which is continuous with the second small diameter part and has the same diameter as the second small diameter part and is inserted into the large diameter part. At the same time, it has a mesh with the same thickness as the screen. And the mesh plate curved into an arc shape is connected with the inner peripheral surface of the large-diameter portion and the communication hole provided in the insertion portion to form a continuous conveying surface, and a cylindrical screen is formed for use. 1 3. According to the sand selection device described in item 6 of the scope of the patent application, in the cylindrical sieve 'and the cylindrical sieve has a first small diameter portion having a supply port on one end side in the axial direction' and another in the axial direction The second small-diameter portion having a discharge port on the end side and the large-diameter portion 'the small-diameter portion and the second small-diameter portion located between the two are supported respectively. Page 39 ο 5? The scope of the patent application is revolving freely and a screen is provided on the outer periphery of the large-diameter portion. In f, the continuation of the first branch portion and the large-diameter portion has a continuous conveying surface from the i-th; The protruding portion protruding toward the large diameter portion protrudes from the aforementioned second small position σ [5 and the connection portion between the large portion and the large portion is formed with an insertion large diameter connecting the second small diameter portion and the second small 彳 a Αβ net ^ 杈The cylindrical insertion part inside the part, and at the same time, there are arrows; +. &Amp; A _ ^ '', machishushi nets with slightly thicker meshes and curved into a circular arc-shaped mesh board instrument public opinion; + ip Α takes the inner peripheral surface of the large diameter part of the bamboo Xingke fan and the communication hole provided in the aforementioned insertion part to be connected and ugly; {4, 4, and black are continuous conveying surfaces, and a cylindrical sieve is formed for use. Medium _ 14_ The sand selection device as described in item 7 of the scope of patent application, in a cylindrical sieve, and the cylindrical sieve has a first small diameter portion having a supply port on one end side in the axial direction, and another in the axial direction The second small-diameter portion with a discharge port on the end side and the large-diameter portion located therebetween are respectively supported to rotate freely and a screen is provided on the outer periphery of the large-diameter portion. Wherein, the continuation portion between the first small-diameter portion and the large-diameter portion has a continuous conveying surface from the first small-diameter portion and a protruding portion protruding into the large-diameter portion is formed; the second small-diameter portion and the large-diameter portion are formed; A cylindrical insertion portion is formed in the continuation portion of the portion, which is continuous with the second small diameter portion and has the same diameter as the second small diameter portion and is inserted into the large diameter portion. The mesh plate bent into a circular shape is connected to the inner peripheral surface of the large-diameter portion and the communication hole provided in the insertion portion to form a continuous conveying surface, and a cylindrical screen is formed for use. Page 40 6. Scope of patent application 15. The sand selection device described in item 1, 2 of the item 3 or 4 in the scope of patent application is in a cylindrical sieve, and the cylindrical sieve is A first small-diameter portion having a supply port different from one end side in the axial direction, a second small-diameter portion having a discharge port at the other end side in the axial direction, and a large-diameter portion, a first small-diameter portion, and a second small-diameter portion located therebetween. Each of the parts is supported to be freely revolving and a screen is provided on the outer periphery of the large-diameter part. The continuous part of the first small-diameter part and the large-diameter part has a continuous conveying surface from the first small-diameter part and is formed. There is a protruding portion protruding toward the large-diameter portion; a circle inserted into the large-diameter portion continuously from the second small-diameter portion and having the same diameter as the second small-diameter portion is formed on the continuation portion of the second small-diameter portion and the large-diameter portion. The cylindrical insertion portion 'also has a mesh having a thickness slightly the same as that of the screen above, and a mesh plate bent into a solitary shape is connected to the inner peripheral surface of the large diameter portion and the communication hole provided in the insertion portion. A continuous conveying surface is formed, and the protruding portion has a cylindrical portion having the same diameter as the first small diameter portion. The protruding part corresponds to the position part body corresponding to the inner side of the sieve in the radial direction. The inclined conveying surface 16 formed by the protruding part body expanding outward, as in the sand selection device described in item 5 of the scope of patent application. Yuan coins_and the cylindrical sieve has a second small diameter portion with a supply port in the axial direction-end side and a discharge port on the other end side in the axial direction, and a rotating white shape such as LU1 /: 部 和 第2 * The diameter part is supported by the center i. There is a screen and a small diameter on the outer periphery of the large diameter part. The small surface is sent continuously: the first part is connected to the large diameter part. ; Protruding into the large diameter part Page 41 4 5 713 6. The scope of the patent application; a cylindrical shape inserted into the large-diameter portion continuously to the second small-diameter portion and having the same diameter as the second small-diameter portion is formed on the continuation portion of the second small-diameter portion and the large-diameter portion. The inserting part, meanwhile, has a mesh having a thickness slightly the same as that of the screen, and a mesh plate bent into a circular solitary shape is connected to the inner peripheral surface of the large-diameter part and the communication hole provided in the inserting to form a continuous one. Conveying surface ', and the protrusion is a protrusion body having a cylindrical portion having the same diameter as the first small-diameter portion, and the protrusion is provided at a position corresponding to an inner side of a diameter direction of the screen. The slanted conveying surface formed by the main body expanding outward. 17. The sand selection device as described in item 6 of the scope of patent application, in a cylindrical sieve, and the cylindrical sieve has a ^ 1 small diameter portion having a supply port on one end side in the axial direction and another in the axial direction. The second small-diameter part with a discharge port on the end side and the large-diameter part located therebetween are supported. The small-diameter part and the second small-diameter part are supported _ freely rotating and a screen is provided on the outer periphery of the large-diameter part. One of the 'continued portions of the first small-diameter portion and the large-diameter portion has a continuous conveying surface from the small position 4 and a protruding portion protruding into the large-diameter portion is formed, and the second small-shuttle portion and the large-diameter portion are formed. A cylindrical insert is formed in the continuation part of the part which is continuous with the second small-diameter part and has the same diameter as the second small-diameter part. The arc-shaped mesh plate is in communication with Θ XiaoΦ of the large diameter portion and the insertion portion. The above-mentioned protrusions are formed to have a continuous conveying surface, and the protrusions have a protrusion * part body composed of a circle-shaped portion having the same diameter as the first, J'_ described above, and a direction corresponding to the diameter of the return net. General on the inside side; 457 〖31 VI. Scope of patent application "-The inclined conveying surface formed by the protrusion body expanding outward. > 18. The sand selection device as described in item 7 of the scope of the patent application, in a cylindrical sieve and the round sieve has a first small diameter portion with a supply port on one end side in the axial direction, and another in the vehicle direction The second small-diameter portion having a discharge port on the end side and the large-diameter portion located therebetween, the first small-diameter portion and the second small-diameter portion are respectively supported to be rotatable and a screen is provided on the outer periphery of the large-diameter portion. Among them, the continuation portion between the first small diameter portion and the large diameter portion has a continuous conveying surface from the first small diameter portion and a protruding portion protruding into the large diameter portion is formed; The continuous part of the radius is formed with a cylindrical insertion part which is continuous with the second small diameter part and has the same diameter as the second small diameter part and is inserted into the large diameter part. At the same time, it has a mesh with the same thickness as the screen. The mesh plate bent into an arc shape is connected to the inner peripheral surface of the large-diameter portion and the communication hole provided in the insertion portion to form a continuous conveying surface, and the protruding portion is provided with The main body of the small part 胄 the cylindrical part with the same diameter corresponds to the diameter direction of the Xue net The inclined conveying surface formed by expanding the above-mentioned protrusion body to the outside at a position on the inner side. 19. According to the sand selection device described in the scope of the patent application, in the cylindrical sieve Φ 0 ^ / $, and the round sieve is the first micro-movement with a supply port on one end side in the axial direction, The second small-diameter part of the exit, and bit; the other side of the direction and the second small-diameter part are supported into back # ^ 第 1】 仫 邠 A screen is provided, and the mouth turns freely and is on the outer periphery of the large-diameter part Among them, the aforementioned first small The continuous part of the diameter part and the large diameter part has Page 43 57 VI. The patent application scope part and # part have continuous conveying surfaces and are formed with protrusions protruding into the large-diameter part. The continuous part of the second small-diameter part and the large-diameter part is formed continuously with the second small part. The cylindrical insertion portion 'with a diameter portion and the same diameter as that of the second small diameter portion and inserted into the large diameter portion' has a mesh hole with a thickness substantially the same as that of the aforementioned screen and a circular arc-shaped mesh plate similar to the foregoing. The inner peripheral surface of the large-diameter portion and the communication hole provided in the above-mentioned insertion 4 are connected to form a continuous conveying surface, in which a part or all of the large-diameter portion, the first small-diameter portion, and the second small-diameter portion are formed. A plurality of delivery plates are provided on the inner peripheral surface, and a delivery surface β-2 is formed to deliver sand toward the discharge port side as the rotation progresses. The sand selection device described in item 5 of the scope of patent application, Yu Yuan "The cylinder screen has a first small-diameter portion having a supply port on one end side in the axial direction", a second small-diameter portion having a discharge port on the other end side in the axial direction, and a large-diameter portion therebetween , The first small diameter part and the second small diameter part are respectively supported to be freely rotated and outside the large diameter part A screen is provided, in which 'the continuation portion between the first small-diameter portion and the large-diameter portion has a continuous conveying surface from the first small-diameter portion and a protrusion protruding into the large-diameter portion is formed on the second small-diameter portion A cylindrical insert is formed in the succession part of the large-diameter part and is continuous with the second diameter and the same diameter as the second small-diameter part. And the net plate is bent to connect the inner peripheral surface of the large-diameter portion and the ®: hole provided in the insertion shirt to form a continuous conveying surface at the large-diameter angle, the diameter portion, and the second small portion. Part of or all of the inner peripheral surface of the diameter part Page 44 457131 VI. Patent application scope '^^ _ A plurality of delivery plates are provided, which are formed with a delivery surface for sand to be delivered to the above-mentioned discharge port side with rotation. 21 · The sand selection device as described in item 6 of the scope of the patent application, in a circular screen "and the cylindrical screen has a small diameter part with a supply port in the axial direction _ end side and the other end in the axial direction A second small-diameter portion having a discharge port on the side, a large-diameter portion located therebetween, and the small- and small-diameter portions and the second small-diameter portion are respectively supported and revolved freely, and a screen is provided on the outer periphery of the large-diameter portion, where ' The first small-diameter portion and the large-diameter portion have a continuous conveyance surface from the small-diameter portion and a protruding portion protruding into the large-diameter portion; and the second small-diameter portion and the large-diameter portion are continuous portions. A cylindrical insertion portion 'continuously inserted in the large diameter portion and continuous with the second small diameter portion and having the same diameter as the second small diameter portion is formed thereon, and it has a mesh with the same thickness as that of the aforementioned screen and is curved and arc-shaped. The net-shaped plate is connected to the inner peripheral surface of the large-diameter portion and the communication hole provided in the insertion portion to form a continuous conveying surface. The large-scale portion, the first small-diameter portion, and the second small-diameter portion are continuous. A plurality of delivery plates are provided on the inner peripheral surface of some or all of the diameter portions, and the sand is formed to rotate the sand toward the The delivery surface of the aforementioned delivery side delivery. 22. The sand selection device as described in item 7 of the scope of the patent application, in the cylindrical sieve 'and the cylindrical sieve has a first small diameter portion having a supply port on one end side in the axial direction' and the other end in the axial direction The second small-diameter portion having a discharge port on the side, and the large-diameter portion 'the first small-diameter portion and the second small-diameter portion located therebetween are supported to rotate freely, and a screen is provided on the outer periphery of the large-diameter portion, where 'The connection between the first small-diameter portion and the large-diameter portion has Page 45 457131 ------ Scope of patent application _ ^ Only the continuous conveying surface is formed from the part and is shaped toward the large-diameter part; the door with a large protrusion protrudes from the continuation part of the second small-diameter part and the large-diameter part. The small part of the branch is the second small diameter and the large diameter part of the same diameter: the cylinder is continued to the insertion part, and the mesh plate with a circular mesh shape with a thickness that is slightly the same as that of the aforementioned I mesh is similar to the aforementioned large diameter. The inner peripheral surface of the part is provided in the aforementioned insert. [^ 'S communication holes are connected to form a continuous conveying surface, in which a plurality of delivery is provided on the inner peripheral surface of part or all of the aforementioned large diameter 4, the first small hollow portion and the second small diameter portion. The plate 'is formed with a delivery surface that delivers sand to the aforementioned discharge port side as the rotation progresses. Di Huang