JP2005200173A - Rotary feeder and sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve material-to-be-carried carrying efficiency. <P>SOLUTION: A rotary feeder 21 is provided with a casing 23 provided with an inner wall 23A, a material-to-be-carried lead-in hole 23B and a material-to-be-carried discharge hole 23C provided in the inner wall 23A of the casing 23, and a rotor 25 for carrying the material to be carried from the material-to-be-carried lead-in hole 23B to the material-to-be-carried discharge hole 23C. The rotor 25 is provided with a closing part 29 capable of temporarily closing the material-to-be-carried discharge hole 23C. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary feeder and a sealing device, and more particularly, to a device capable of temporarily closing an object discharge hole.

  Conventionally, for example, a rotary feeder for conveying earth and sand in civil engineering work is known (for example, Non-Patent Document 1).

  FIG. 14 is a cross-sectional view showing a schematic configuration of a conventional rotary feeder 100, and in particular, a rotation center axis (rotation axis) of a rotating body 9 that is rotatably provided inside the casing 3 of the rotary feeder 100. It is sectional drawing by the plane perpendicular | vertical to CL1.

  FIG. 15 is a cross-sectional view showing a schematic configuration of a conventional rotary feeder 100, and is a view showing a XVA-XVB cross section in FIG.

  The conventional rotary feeder 100 conveys an object to be transported (for example, earth and sand) through the housing 3 by rotating a rotating body (rotating member) 9 that can rotate inside the housing 3. In order to introduce an object to be conveyed from the outside of the housing 3 into the housing 3, the housing 3. A transported object introduction hole 3B is provided on one side of the inner wall 3A.

  In addition, in order to discharge an object to be transported introduced into the housing 3 from the inside of the housing 3 to the outside of the housing 3, the other side of the inner wall 3A of the housing 3 is placed on the other side. A conveyed product discharge hole 3C is provided. The conventional rotary feeder 100 is usually installed and used with the conveyed object introduction hole 3B on the upper side and the conveyed object discharge hole 3C on the lower side.

  The transported object discharge hole 3C is connected to a pipe 5 for transporting the transported object that has come out of the transported object discharge hole 3C. Further, in the vicinity of the transported object discharge hole 3C, Compressed fluid ejecting means 7 is provided which can eject a compressed fluid (for example, compressed air) for pumping the conveyed object in the pipe 5 in the direction of the arrow AR21 in the direction of the arrow AR29.

  In addition, a rotating body 9 is provided inside the casing 3, and the rotating body 9 has a center axis CL1 in the extending direction of the cylindrical side wall 3A of the casing 3 as a rotation center. 14 is rotatable in the direction of an arrow AR25 shown in FIG. Then, as the rotating body 9 rotates, the object to be conveyed introduced into the casing 3 from the conveyed object introduction hole 3B as shown by an arrow AR23 passes through the casing 3. Then, it is transported to the transported object discharge hole 3C and discharged into the pipe 5 as indicated by an arrow AR27.

  Further, at both ends of the rotating body 9 in the direction of the rotation center axis CL1, in order to prevent the conveyed object from leaking out of the rotary feeder 100, disk-shaped axial partition members 103A and 103B are provided. Is provided (see FIG. 15). Further, seal members 105A, 105B formed of rubber packing or the like are provided between the outer peripheral portions of the axial partition members 103A, 103B and the inner wall 3A of the housing 3.

Moreover, between each rotation direction partition member 9A-9G extended in the direction which goes to the inner wall 3A of the said housing | casing 3 from the rotation center axis | shaft CL1 of the said rotary body 9, and the inner wall 3A of the said housing | casing, it comprises with metal, for example. A sealing member (not shown) is provided, and the metal sealing member allows the rotating body 9 to be rotated between the inner wall 3A of the casing 3 and the rotating body 9 rotatable in the casing 3. A sealing device is formed for sealing in the rotational direction.
Published by Yakumo Shoten Co., Ltd. “Fluid Conveyor [Conveyor Series 3]”, December 30, 1959

  By the way, in the sealing device of the conventional rotary feeder 100, the metal seal member provided between the rotation direction partition members 9A to 9G and the inner wall 3A of the housing has almost no elasticity. It is difficult to eliminate the gap between the metal seal member and the inner wall 3A of the housing 3.

  Here, the reason why the gap cannot be eliminated will be described further. In the actual rotary feeder 100, slight distortion of the inner wall 3A of the housing 3 and the axis of the inner wall 3A and the rotation center axis of the rotating body 9 Due to a slight mismatch in position with CL1, the size of the gap between the inner wall 3A and the metal seal member slightly changes as the rotating body 9 rotates. If the gap is not present between the inner wall 3A and the metal seal member, the metal seal member interferes with the inner wall 3A of the housing as the rotating body 9 rotates, and the metal seal This is because the rotary feeder 100 may be damaged, for example, the member may damage the inner wall.

  Therefore, instead of the metal seal member, a sealing device can be considered in which the seal member is formed of an elastic body such as rubber and the seal member having elasticity is brought into contact with the inner wall 3A. In some cases, wear occurs in the seal member, and a gap may be generated between the seal member and the inner wall 3A of the housing 3 due to the wear.

  Further, wear also occurs with respect to each of the seal members 105A and 105B, and a gap may be generated between the seal members 105A and 105B and the inner wall 3A of the housing 3 due to the wear.

  When a gap is generated between the seal member provided between each rotation direction partition member 9A to 9G and the inner wall 3A of the casing and the inner wall 3A of the casing 3, the rotary feeder 100 is in operation. In addition, the compressed fluid ejected from the compressed fluid ejecting means 7 flows not only in the direction of the arrow AR21 but also in the housing 3. And it passes through the said clearance gap, reaches | attains the said to-be-conveyed object introduction hole 3B, and flows in the direction opposite to the direction shown by arrow AR23.

  Further, the compressed fluid flowing in the direction opposite to the arrow AR23 does not smoothly introduce the conveyed object from the conveyed object introduction hole 3B into the housing 3, and the direction indicated by the arrow AR23. The amount of the compressed fluid flowing through the gap decreases due to the presence of the gap, and the conveyance efficiency of the object to be conveyed such as earth and sand by the rotary feeder 100 is lowered.

  Further, even when a gap is generated between the seal members 105A and 105B and the inner wall 3A of the housing 3, the compressed fluid ejected from the compressed fluid ejecting means 7 is not only in the direction of the arrow AR21, There is a problem that it flows into the housing 3, leaks to the outside of the housing 3 through the gap, and the transport efficiency of transported objects such as earth and sand by the rotary feeder 100 decreases.

The present invention has been made in view of the above problems, and in order to introduce a casing provided with an inner wall and an object to be conveyed from the outside of the casing into the casing, the inner wall of the casing is provided. In order to discharge the object to be conveyed introduced into the inside of the casing and the outside of the casing from the inside of the casing to the outside of the casing, A transported object discharge hole; and a rotating body that is rotatably provided in the housing, includes a plurality of recesses, and transports the transported object from the transported object introduction hole to the transported object discharge hole. Another object of the present invention is to provide a rotary feeder and a sealing device that can increase the conveyance efficiency of the object to be conveyed.

  The invention according to claim 1 is a casing provided with an inner wall, and a transferred object provided on the inner wall of the casing for introducing the transferred object from the outside of the casing into the casing. An introduction hole, and a discharged object discharge hole provided in an inner wall of the casing to discharge the transferred object introduced into the casing from the inside of the casing to the outside of the casing; A rotary feeder provided with a rotating body that is rotatably provided in the housing and has a plurality of recesses, and that transports the transported object from the transported object introduction hole to the transported object discharge hole. A closed portion capable of temporarily closing the transported object discharge hole as the body rotates is a rotary feeder provided in the rotating body.

  According to a second aspect of the present invention, in the rotary feeder according to the first aspect, the closing portion can temporarily close the conveyed object introduction hole as the rotating body rotates. It is a rotary feeder.

  According to a third aspect of the present invention, in the rotary feeder according to the second aspect, a plurality of the closing portions are formed on the rotating body at a portion of the rotating body located between the recesses. When one of the closed parts closes the object discharge hole, the object introduction hole opens, and one of the closed parts is the object introduction hole. The rotary feeder is configured to open the transported object discharge hole when the is closed.

  According to a fourth aspect of the present invention, in the rotary feeder according to the third aspect, the rotating body has a rotation center axis substantially coincident with a center axis in the extending direction of the inner wall of the casing formed in a cylindrical side surface shape. A central member extending in the extending direction is provided, and a plurality of plate-like rotational direction partition members are provided on the central member, and each of the plate-like rotational direction partition members extends in the extending direction of the rotational central axis. The base end side is fixed to the central member, the distal end side extends to the vicinity of the inner wall of the housing, and the closing portions are provided on the distal end side of the rotation direction partition members. This member is an arcuate outer peripheral surface having a radius of curvature slightly smaller than the radius of curvature of the inner wall, and the length of the arc in the rotational direction of the rotating body is the transported member. The length of the object discharge hole and the above The outer peripheral surface is longer than the length of the conveyed product introduction hole, and the length in the rotation center axis direction of the rotating body is equal to or longer than the length of the conveyed product introduction hole and the length of the conveyed product discharge hole. It is a rotary feeder.

  According to a fifth aspect of the present invention, in the rotary feeder according to any one of the first to fourth aspects, the casings are adjacent to each other in cooperation with the closing portion. It is a rotary feeder provided with a circumferential sealing device for sealing between recesses.

  According to a sixth aspect of the present invention, there is provided a housing having an inner wall and a transported object provided on the inner wall of the housing in order to introduce the transported object from the outside of the housing into the housing. An introduction hole, and a discharged object discharge hole provided in an inner wall of the casing to discharge the transferred object introduced into the casing from the inside of the casing to the outside of the casing; A rotary feeder provided with a rotating body that is rotatably provided in the housing and includes a plurality of recesses and that transports the transported object from the transported object introduction hole to the transported object discharge hole. The body is provided with a circumferential sealing device for sealing between the respective recesses adjacent to each other, and the circumferential sealing device is provided with the transported object regardless of the rotation angle of the rotating body. It is configured to block between the introduction hole and the transported object discharge hole. Is Tarifida.

  The invention according to claim 7 is a casing provided with an inner wall, and a transferred object provided on the inner wall of the casing for introducing the transferred object from the outside of the casing into the casing. An introduction hole, and a discharged object discharge hole provided in an inner wall of the casing to discharge the transferred object introduced into the casing from the inside of the casing to the outside of the casing; A rotary feeder provided with a rotating body that is rotatably provided in the casing and includes a plurality of recesses and that transports the transported object from the transported object introduction hole to the transported object discharge hole. The length in the rotational direction of the rotating body at the closing portion for closing the conveyed product introduction hole and the transported object discharge hole corresponds to a circular arc length corresponding to a central angle of 60 ° around the rotational center axis of the rotating body. The transported object introduction hole and the transported object discharge hole are the rotating body. It is arranged at a position substantially symmetrical with respect to the rotation center axis, and the arc length of the conveyed product introduction hole in the rotation direction of the rotation body is a center of 60 ° centering on the rotation center axis of the rotation body The casing is provided with a circumferential sealing device that seals between the recesses adjacent to each other in cooperation with the closing portion. A protruding portion that slightly protrudes from the inner wall of the housing to the rotating body side and has a predetermined width in the rotating direction of the rotating body and extends in the extending direction of the rotation center axis of the rotating body The circumferential sealing device is configured so that the portion contacts and seals with the outer peripheral surface of the closed portion, and the center line of the conveyed object introduction hole in the rotation direction of the rotating body is used as a reference. Within ± 60 ° around the rotation center axis of the rotating body The center of the protruding part in the rotation direction of the rotating body is located at a position corresponding to the center angle, and the center of the protruding part in the rotation direction of the rotating body is located at a position corresponding to the center angle of ± 120 °. By doing so, four projecting parts are provided, and any one of the projecting parts comes into contact with the closing portion, so that the object to be conveyed introduction hole is provided regardless of the rotation angle of the rotating body. And a rotary feeder configured to block between the transported object discharge hole.

  The invention according to claim 8 is the rotary feeder according to any one of claims 1 to 7, wherein the transported object introduction hole is provided on the upper side of the casing, and the transported object is provided. A discharge hole is provided on the lower side of the housing, and a lower side of the transported object discharge hole receives a transported object discharged from the transported object discharge hole and sends it to the next process. A conveyed product receiving part is provided, and a compressed fluid ejection hole for ejecting a compressed fluid for pumping the received conveyed object is provided below the conveyed object receiving part. The rotary feeder is provided with a rectifying member for preventing the conveyed object from flowing backward between the object discharge hole and the compressed fluid ejection hole.

  According to a ninth aspect of the present invention, in the rotary feeder according to the eighth aspect, the wall in the vicinity of the compressed fluid ejection hole at the transported object receiving portion is a surface of the transported object that has fallen from the transported object discharge hole. The rectifying member is a rotary feeder that is inclined obliquely in the same tendency as the obliquely inclined wall.

  A tenth aspect of the present invention is the rotary feeder according to any one of the first to ninth aspects, wherein the conveyed object introduction hole is provided on an upper side of the casing, and the conveyed object A discharge hole is provided on the lower side of the casing, and a hopper for supplying the object to be conveyed to the object to be conveyed introduction hole is provided above the object to be conveyed introduction hole. In order to prevent the object to be transported between the part and the inner wall of the housing, in the vicinity of the rear inlet part which is the part of the object introduction hole on the rear side in the rotation direction of the rotating body In the rotary feeder, the crossing angle between the inner wall of the hopper and the rotation direction of the rotating body at the rear introduction port portion is an obtuse angle formed inside the hopper.

  According to an eleventh aspect of the present invention, in the rotary feeder according to the tenth aspect, the conveyed object introduction hole is a rotary feeder provided directly above a casing of the rotary feeder.

  A twelfth aspect of the present invention is the rotary feeder according to any one of the first to eleventh aspects, wherein the concave portions are formed at both ends of the rotating body in the extending direction of the rotation center axis. A disc-shaped axial partition member is provided, and an axial sealing device is provided for sealing between the outside of the recess and the recess by sealing the outer peripheral portion of each axial partition member. It is a rotary feeder.

  A thirteenth aspect of the present invention is the rotary feeder according to the twelfth aspect of the present invention, wherein the axial sealing device is an outer periphery of a ring-shaped axial partition member located on the outer periphery of the axial partition member. And an outer diameter of the outer peripheral portion of the axial partition member is larger than an outer diameter of the outer peripheral portion of the axial partition member, and is integrally provided on the casing on the outer diameter side. A thin plate-like fixing member whose side surface is in contact with the outer peripheral portion of the axial partition member, and a cylinder that is provided on the casing and sandwiches the thin plate-like fixing member in cooperation with the outer peripheral portion of the axial partition member A rotary feeder configured to seal by sandwiching the thin plate-like fixing member with a weak force between the outer peripheral portion of the axial partition member and the piston of the cylinder.

  The invention according to claim 14 is a casing provided with an inner wall, and a transported object provided on the inner wall of the casing for introducing the transported object from the outside of the casing into the casing. An introduction hole, and a discharged object discharge hole provided in an inner wall of the casing to discharge the transferred object introduced into the casing from the inside of the casing to the outside of the casing; A rotary feeder provided with a rotating body that is rotatably provided in the casing and includes a plurality of recesses and that transports the transported object from the transported object introduction hole to the transported object discharge hole. A transported object introduction hole is provided on the upper side of the casing, the transported object discharge hole is provided on the lower side of the casing, and the transported object discharge hole is provided below the transported object discharge hole. There is an object receiving part for receiving an object discharged from the object discharge hole and sending it to the next process. A compressed fluid ejection hole for ejecting a compressed fluid for pumping the received conveyed object is provided below the conveyed object receiving portion, and the conveyed object discharge hole and the The rotary feeder is provided with a flow regulating member for preventing the conveyed object from flowing backward between the compressed fluid ejection holes.

  According to a fifteenth aspect of the present invention, a gap between a recess provided in a rotatable body provided in a casing and the outside of the recess is sealed in the extending direction of the rotation center axis of the rotary body. In the sealing device for the above, the both ends of the rotating body in the extending direction of the rotation center axis are provided with disc-shaped axial partition members that form the recesses in the extending direction of the rotation center axis. A ring-shaped axial partition member outer peripheral portion located outside and on the outer periphery of the axial partition member, and disposed substantially concentrically with the outer peripheral portion of the axial partition member, the outer diameter of the axial partition member being the axial direction A thin plate-like fixing member that is integrally provided in the casing on the outer diameter side, which is larger than the outer diameter of the outer peripheral portion of the partition member, and whose inner diameter side is in contact with the outer peripheral portion of the axial partition member; and Provided and cooperates with the outer periphery of the axial partition member. Each of the axial directions by sandwiching the thin plate-shaped fixing member with a weak force between the outer peripheral portion of the axial partition member and the piston of the cylinder. It is a sealing device configured to seal the outer peripheral portion of the partition member and seal between the outside of the recess and the recess.

  According to the present invention, a casing provided with an inner wall, and a transported object introduction hole provided in the inner wall of the casing for introducing a transported object from the outside of the casing into the casing. A transport object discharge hole provided in an inner wall of the housing for discharging the transported material introduced into the housing from the inside of the housing to the outside of the housing; A rotary feeder that includes a plurality of recesses and includes a rotating body that transports the transported object from the transported object introduction hole to the transported object discharge hole. There is an effect that the conveyance efficiency can be increased.

  1 and 2 are cross-sectional views showing a schematic configuration of a rotary feeder 21 according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the line IIIA-IIIB in FIG. FIG. 1 and FIG. 2 are the same drawings except for the reference numerals. Since only FIG. 1 has a lot of reference numerals and the drawing becomes complicated, it is divided into FIG. 1 and FIG.

  The rotary feeder 21 according to the embodiment of the present invention includes a housing 23 having a cylindrical side wall-shaped inner wall 23A, and a material to be transported (for example, earth and sand) from the outside of the housing 23 to the inside of the housing 23. In order to introduce, a transported object introduction hole 23B is provided on one side of the inner wall 23A of the housing 23.

  Further, in order to discharge the object to be conveyed introduced into the housing 23 from the inside of the housing 23 to the outside of the housing 23, the other side of the inner wall 23A of the housing 23 is placed on the other side. A conveyed product discharge hole 23C is provided. As described above, the rotary feeder 21 is usually installed and used with the transported object introduction hole 23B on the upper side and the transported object discharge hole 23C on the lower side.

  A rotating body 25 having a plurality of recesses (pockets into which the object to be conveyed) 27 is provided inside the casing 23, and the rotating body 25 is an inner wall 23 </ b> A having a cylindrical side surface shape of the casing 23. 1 is rotatable in the direction of the arrow AR3 shown in FIG.

  Then, as the rotating body 25 rotates, the object to be conveyed introduced into the casing 23 from the conveyed object introduction hole 23B as indicated by an arrow AR5 uses the recesses 27 to form the casing. 23, is transported to the transported object discharge hole 23C, and is discharged from the transported object discharge hole 23C as indicated by an arrow AR7.

  In addition, each said recessed part 27 is provided in three places, for example, and exists in the position which distributed the rotation circumference of the said rotary body 25 equally.

  Further, as shown in FIG. 3, the rotating body 25 is rotatable with respect to the base 20 via bearings BR1 at both ends in the extending direction of the rotation center axis CL3. One end of the rotating body 25 is linked to an output shaft of an actuator such as a motor 24 via a speed reducer 22, and the rotating body 25 is rotated by rotating the rotating output shaft of the motor 24. It is designed to rotate. Further, the housing 23 is provided integrally with the base 20.

  The rotating body 25 is provided with a closing portion 29 capable of temporarily closing the transported object discharge hole 23 </ b> C as the rotating body 25 rotates. In addition, the closing portion 29 can temporarily close the conveyed object introduction hole 23 </ b> B as the rotating body 25 rotates.

  Further, a plurality of the closing portions 29 are formed in the rotating body 25 at the portions of the rotating body 25 (portions on the inner wall 23A side of the housing 23) located between the concave portions 27. When one of the closed portions 29 closes the transported object discharge hole 23C (when fully closed), the transported object introduction hole 23B is opened (fully opened), When one of the closed portions 29 closes the conveyed object introduction hole 23B (when fully closed), the conveyed object discharge hole 23C is opened (fully opened). It is configured.

  More specifically, the rotating body 25 includes a central member 31 that extends in the direction of the rotation center axis CL3 substantially coincident with the center axis in the extending direction of the inner wall 23A of the casing 23 formed in a cylindrical side surface shape. The central member 31 is provided with a plurality of plate-like rotational direction partition members 33, and each of the plate-like rotational direction partition members 33 extends in the extending direction of the rotational center axis CL3. The proximal end side is fixed to the central member 31, and the distal end side extends to the vicinity of the housing inner wall 23A.

  Each of the closing portions 29 is configured by a plate-like member provided on the tip end side of each of the rotational direction partition members 33, and this member has a radius of curvature slightly smaller than the radius of curvature of the inner wall 23A. A small arc-shaped outer peripheral surface (an outer peripheral surface facing the inner wall 23A of the housing 23) 29A, and the length of the arc in the rotation direction of the rotating body 25 is the length of the transported object discharge hole 23C. The length of the rotating body 25 in the direction of the central axis of rotation is the same as or longer than the length of the transported object introducing hole 23B and the length of the transported object discharge hole 23C. An outer peripheral surface (outer wall) 29A is provided.

  In addition, the three rotation direction partition members 33 are provided at three positions that are substantially equally distributed in the rotation direction of the central member 31, and the members constituting the closing portion 29 are respectively in the rotation directions. The partition member 33 is provided so as to extend from the front end of the partition member 33 in a direction opposite to the rotation direction of the central member 31 (rotating body 25).

  As already understood, the rotating body 25 provided with the rotation direction partition members 33 and the closing portions 29 is cut along a plane perpendicular to the extending direction of the rotation center axis CL3 of the rotating body 25. The cross-sectional shape at this time is a shape in which one arm is removed from the “卍” shape and the three arms are arranged at positions equally distributed by 120 °. Further, the closing portion 29 located on the distal end side of the arm is formed in an arc shape.

  Furthermore, the length of the rotating body 25 (the length in the extending direction of the rotation center axis CL3 of the rotating body 25) constituted by the rotating direction partition members 33, the closing portions 29, and the central member 31 is a circle. Slightly shorter than the height (the length in the extending direction of the rotation center axis CL3 of the rotating body 25) of the internal space (the space containing the rotating body 25) of the casing 3 formed in a column shape. It has become.

  Further, the casing 23 of the rotary feeder 21 is provided with a circumferential sealing device 35 for sealing between the recesses 27 adjacent to each other in cooperation with the closing portion 29. .

  The circumferential sealing device 35 seals between the closed portion 29 and the inner wall 23A of the housing 23 regardless of the rotation angle of the rotating body 25, thereby allowing the object to be conveyed introduction hole 23B and the object to be sealed to be sealed. It is configured so as to block the conveyed product discharge hole 23 </ b> C in the rotational direction of the rotating body 25.

  For example, in FIG. 1, the installation angle θ1 of the two circumferential sealing devices 35 existing between the conveyed object introduction hole 23B and the conveyed object discharge hole 23C, and the rotation of the rotating body 25 The installation angle θ1 centered on the central axis CL3 is the installation angle θ3 of the portion of the rotating body where the closing portion 29 is provided, and the installation angle θ3 centered on the rotational center axis CL3 of the rotating body 25. Therefore, it is possible to always block between the transported object introduction hole 23B and the transported object discharge hole 23C regardless of the rotation angle of the rotating body 25. ing.

  Here, to explain in detail with an example, the length of the closing portion 29 in the rotation direction of the rotating body 25 is an arc corresponding to a central angle of 60 ° with the rotation center axis CL3 of the rotating body 25 as the center. It has become a length.

  Further, the transported object introduction hole 23B and the transported object discharge hole 23C are arranged at positions substantially symmetrical with respect to the rotation center axis CL3 of the rotating body 25. The arc length of the conveyed object introduction hole 23B in the rotation direction is shorter than the arc length corresponding to the center angle of 60 ° around the rotation center axis CL3 of the rotating body 25, for example, a center angle of 50 °. The arc length of the transported object discharge hole 23C in the rotation direction of the rotating body 25 is 60 ° centered on the rotation center axis CL3 of the rotating body 25. The arc length is shorter than the arc length according to the center angle, for example, according to the center angle of 50 °.

  Here, the circumferential sealing device 35 will be described in detail.

  4 is a cross-sectional view showing a schematic configuration of the circumferential sealing device 35, and is an enlarged view of a portion IV in FIG. FIG. 5 is a view showing the VA-VB arrow in FIG.

  The circumferential sealing device 35 is configured such that a protruding portion 37 that slightly protrudes from the inner wall 23 </ b> A of the housing 23 toward the rotating body 25 contacts and seals the outer peripheral surface 29 </ b> A of the closing portion 29. . The protruding portion 37 has a predetermined width in the rotation direction of the rotating body 25 and extends by substantially the same length as the closing portion 29 in the extending direction of the rotation center axis CL3 of the rotating body 25. Further, as already understood, the inner wall 23A of the housing 23 and the closing portion 29 (rotating body 25) are slightly separated from each other.

  Further, as shown in FIG. 1, with respect to the center line CL5 of the transported object introduction hole 23B in the rotation direction of the rotating body 25, ± 60 ° centered on the rotation center axis CL5 of the rotating body 25. The center of the protruding portion 37 in the rotational direction of the rotating body 25 is located at a position corresponding to the central angle, and the protruding portion 37 in the rotational direction of the rotating body 25 is located at a position corresponding to the central angle of ± 120 °. The four projecting portions 37 are provided by positioning the center of.

  Then, any one of the projecting portions 37 comes into contact with the closing portion 29, so that the transported object introduction hole 23B and the transported object discharge hole 23C regardless of the rotation angle of the rotating body 25. Is blocked by the rotation direction of the rotating body 25.

  Here, the circumferential sealing device 35 will be described in more detail with reference to FIGS. 4 and 5.

  As described above, the circumferential sealing device 35 seals the rotating body 25 in the rotating direction between the inner wall 23A of the housing 23 having the inner wall 23A formed in a cylindrical side surface shape and the rotating body 25. It is a device for doing. As already understood, the rotating body 25 has the axis substantially coincident with the center axis of the inner wall 23A as a rotation center axis CL3 and is in a non-contact state with the inner wall 23A except for the bearing portion. The body 23 is rotatably provided.

  The circumferential sealing device 35 includes a seal member 39 that constitutes the protruding portion 37. The seal member 39 is made of metal or rubber having elasticity, and the direction of the rotation center axis CL3 of the rotating body 15 is the same. The base end portion 39A side is a highly rigid holding member such as metal (a rectangular parallelepiped holding member extending in the direction of the rotation center axis CL3 of the rotating body 15 as with the seal member 39). 41 is provided integrally, and the tip 39B side extends toward the inner wall 23A.

  The seal member 39 and the holding member 41 are separated from or approach the inner wall 23A of the housing 23 (a direction from the base end portion 39A side to the tip end portion 39B side; rotation of the rotating body 25). In a direction away from or approaching the center axis CL3; a direction indicated by an arrow AR9 in FIG.

  More specifically, the cross-sectional shape of the rotary body 15 by a plane perpendicular to the extending direction of the rotation center axis CL3 is “T” -shaped, and the rotary body is similar to the seal member 39 and the holding member 41. A holding member 43 extending in the direction of the 15 rotation center axis CL3 is integrally provided by engaging with a groove 23D provided in the housing 23.

  In the state where the holding member 43 is provided in the housing 23, the portion of the holding member 43 corresponding to the lower side of the “T” is engaged with the groove 23 </ b> D of the housing 23. Yes.

  In addition, the holding member 43 corresponding to the lower side of the “T” character and corresponding to the intermediate portion of the “T” character in the left-right direction opens toward the rotating body 25 (the tip 43B side). And a rectangular parallelepiped groove 43A formed in the extending direction of the rotation center axis CL3 of the rotating body 25, and the holding member 41 slides against the groove 43A to form the seal. The member 39 and the holding member 41 can move.

  In the state where the holding member 43 is installed in the housing 23, the distal end portion 43 </ b> B of the holding member 43 is slightly separated from the closing portion 29 of the rotating body 25, and the distal end portion of the seal member 39. A portion on the 39B side forms the protruding portion 37.

  Further, the moving direction of the seal member 39 and the holding member 41 may cross obliquely with respect to the direction away from or approaching the inner wall 23 </ b> A of the housing 23.

  Fluid that operates with a pressurized fluid (incompressible fluid) corresponds to the upper side of the “T” character, and the portion of the holding member 43 that corresponds to the middle portion of the “T” character in the horizontal direction. A hydraulic cylinder 45 which is an example of a pressure cylinder is provided, and the hydraulic cylinder 45 causes the tip portion 39B of the seal member 39 to contact the outer wall 29A of the closing portion 29 of the rotating body 25 with a contact pressure. The seal member 39 can move in the direction of the closing portion 29 (rotating body 25).

  The hydraulic cylinder 45 is connected to a hydraulic supply path 47 through which hydraulic hydraulic fluid can be guided to the hydraulic cylinder 45. The hydraulic pressure supply passage 47 has one end connected to the hydraulic cylinder 45 and the other hydraulic pressure supply source (pressurized hydraulic fluid supply source) 49 connected to the hydraulic cylinder 45 at the other end. A coupler 51 which is an example of the means is provided. Note that a pressure adjusting valve capable of adjusting the pressure of the hydraulic fluid may be provided between the fluid pressure supply source 49 and the coupler 51.

  In the middle of the hydraulic pressure supply path 47, the fluid supplied into the hydraulic cylinder 45 through the hydraulic pressure supply path 47 leaks out of the hydraulic cylinder 45 through the hydraulic pressure supply path 47. In order to prevent this, a check valve 53 is provided. Note that one connecting portion of the coupler 51 and the check valve 53 are provided in the housing 23, for example, and the other connecting portion of the coupler 51 and a fluid pressure supply source (hydraulic hydraulic oil supply source) 49 are When the rotary feeder 21 is in operation, it is removed from the rotary feeder 21.

  Since the casing 23 does not rotate and is fixed to the base 20, the coupler is deleted, and the rotary feeder 49 is connected to the hydraulic pressure supply passage 47 while the fluid pressure supply source 49 is connected. 21 may be operated.

  Further, the one circumferential sealing device 35 has a plurality of the hydraulic cylinders 45. As shown in FIG. 5, these hydraulic cylinders 45 are provided apart from each other in the extending direction of the rotation center axis CL3 of the rotating body 15, and the extending direction of the rotation center axis CL3 of the rotating body 15 is provided. The amount of change in the contact pressure of the seal member 39 is reduced.

  For example, similarly configured hydraulic cylinders (hydraulic cylinders having the same inner diameter) 45 are provided side by side in the extending direction of the rotation center axis CL3 of the rotating body 15. A check valve 53 is provided in the middle of each supply path 47 of hydraulic hydraulic oil to each hydraulic cylinder 45, and each hydraulic pipe constituting each supply path 47 is connected to each other to form one hydraulic pipe. It has become. One end portion of the single hydraulic pipe is connected to a hydraulic fluid supply source 49 via a coupler 51.

  By being configured in this way, the forces by which the hydraulic cylinders 45 push the seal member 39 become substantially equal to each other.

  Here, the hydraulic cylinder 45 will be described in detail with specific examples.

  As shown in FIG. 4, the hydraulic cylinder 45 includes a pressure chamber 55 formed in, for example, a cylindrical shape. The pressure chamber 55 corresponds to the upper side of the “T” character, and is provided at a portion of the holding member 43 corresponding to the middle portion of the “T” character in the left-right direction. In FIG. 4 and FIG. 5, the display of a seal member such as an O-ring constituting the cylinder 45 is omitted.

  Further, depending on the part where the pressure chamber 55 is provided, the part of the holding member 43 corresponding to the middle part of the “T” character in the vertical direction and the middle part of the “T” character in the horizontal direction. A cylindrical through hole 57 is provided through the pressure chamber 55 and the groove 43A in which the seal member 39 and the holding member 41 are provided.

  The pressure chamber 55 and the through hole 57 are provided coaxially, and the inner diameter of the through hole 57 is smaller than the inner diameter of the pressure chamber 55.

  Further, a cover member 58 is provided at a portion of the holding member 43 corresponding to the upper portion of the “T” shape. The cover member 58 is provided with a through hole 58A having an inner diameter smaller than the inner diameter of the through hole 57, and the through hole 58A is coaxial with the pressure chamber 55 and the through hole 57. Is provided.

  Further, the hydraulic cylinder 45 includes a piston member 59, and the piston member 59 has an outer diameter slightly smaller than the inner diameter of the through hole 57 and is engageable with the through hole 57 (the through hole 57). And a cylindrical engaging portion 59A that is slidable in the moving direction of the seal member 39).

  Further, a male screw part 59B for engaging the piston member 59 with the seal member 39 (holding member 41) is provided on one end side of the piston member 59, and the other end of the piston member 59 is provided. On the part side, the outer diameter is slightly smaller than the inner diameter of the through-hole 58A, and is engageable with the through-hole 58A (engaged with the through-hole 58A and slidable in the moving direction of the seal member 39). A cylindrical engagement portion 59C is provided. The outer diameter of the engaging portion 59C is smaller than the outer diameter of the engaging portion 59A.

  Further, a male screw portion 59D is provided on the distal end side of the engaging portion 59C, and a part of the male screw portion 59D protrudes from the cover member 58, and a nut NT1 is provided at the protruding portion. With this engagement, the piston member 59 does not protrude more than necessary in the direction of the rotating body 25.

  The engaging portion 59A, the male screw portion 59B, and the engaging portion 59C exist on the same axis.

  The engagement portion 59C is provided with a through hole 59E for supplying hydraulic fluid to the pressure chamber 55, and one end of the through hole 59E is connected to the supply path 47.

  Then, when pressurized hydraulic fluid (hydraulic fluid whose pressure is higher than atmospheric pressure) is supplied into the pressure chamber 55 in a state where the closing portion 29 faces the seal member 39, The piston member 59 moves in the direction of the inner wall 23A of the housing 23 (the direction of the closing portion 29) due to the difference in area (difference in outer diameter) between the engaging portion 59C and the engaging portion 59A. Thus, the seal member 39 moves in a direction toward the rotation center axis CL3 of the rotating body 25. Then, the sealing member 39 comes into contact with the closing portion 29 of the rotating body 25 with a contact pressure.

  After the contact, the nut NT1 is tightened and the nut NT1 is brought into contact with the cover member 58 so that the tip 39B of the seal member 39 is in contact with the outer wall 29A of the closing portion 29 with contact pressure. Therefore, the seal member 39 can be prevented from moving in the direction of the rotating body 25. In addition, after tightening the nut NT1, another nut NT3 is screwed into the male screw portion 59D so that the nut NT1 does not loosen. Thereafter, the supply path 47 is shut off at the coupler 51. Note that the stop valve 61 is normally closed.

  Further, the holding member 43 corresponding to the lower side of the “T” character and corresponding to both ends in the left-right direction of the “T” character is composed of a hard member such as cemented carbide, and the sealing member. Similarly to 39, a wiper 63 is provided which extends in the extending direction of the rotation center axis CL3 of the rotating body 25. Then, the wiper 63 is in contact with the outer wall 29A of the closing portion 29 or slightly separated, and with the rotation of the rotating body 25, the transported object attached to the outer wall 29A of the closing portion 29 is removed. There is no risk of the protruding portion 37 being damaged by the conveyed object.

  Further, as shown in FIGS. 1 and 3, under the conveyed object discharge hole 23 </ b> C, the conveyed object for receiving the conveyed object discharged from the conveyed object discharge hole 23 </ b> C and sending it to the next process. An object receiving part (a part blocked from the outside except for the object discharge hole 23C and the object flow path 64 to the next process) 65 is provided.

  A compressed fluid ejection hole 67 for ejecting a compressed fluid (for example, compressed air) for pumping the received conveyed object is provided below the conveyed object receiving portion 65, and the conveyed object is Between the discharge hole 23C and the compressed fluid ejection hole 67, the object to be conveyed and the fluid that has come out of the compressed fluid ejection hole 67 are prevented from flowing back toward the object to be conveyed discharge hole 23C. A rectifying member 69 is provided.

  The compressed fluid ejection hole 67 constitutes a compressed fluid ejection means similar to the compressed fluid ejection means 7 of the conventional rotary feeder 100 together with a compressed air supply device (not shown).

  In addition, a wall (for example, a part of the inner wall of the conveyed product receiving portion) 65A in the vicinity of the compressed fluid ejection hole 67 in the conveyed product receiving portion 65 is used for the conveyed object that has fallen from the conveyed product discharge hole 23C. The rectifying member 69 is made of a thin flat plate-like member and is inclined in the same tendency as the obliquely inclined wall 65A, for example, substantially parallel and inclined. .

  In addition, the to-be-conveyed object which fell from the to-be-conveyed object discharge hole 23C is conveyed in one direction parallel to the extending | stretching direction of the rotation center axis | shaft CL3 of the said rotary body 25, for example, and a horizontal direction. The compressed fluid ejection hole 67 extends in a direction parallel to the extending direction of the rotation center axis CL3 of the rotating body 25, and the transport direction of the transported object that has fallen from the transported object discharge hole 23C. Compressed fluid is ejected in the direction of arrow AR11.

  Further, a wall (inner wall) 65A in the vicinity of the compressed fluid ejection hole 67 in the transported material receiving part 65 is a lower side of the transported object receiving part 65 and the side where the compressed fluid ejection hole 67 is provided. (It is provided on the side opposite to the transported object flow path 64 to the next process) and extends in a direction perpendicular to the extending direction of the rotation center axis CL3 of the rotating body 25.

  Further, as described above, the rectifying member 69 extends, for example, in parallel to the wall in the vicinity of the compressed fluid ejection hole 67 in the transported object receiving part 65, and one of the transported object receiving part 65. The inner wall 65B extends to the other inner wall (inner wall facing the one inner wall) 65C (see FIG. 1).

  Further, the rectifying member 69 is provided at an intermediate portion of the conveyed product receiving portion 65 (an intermediate portion in the vertical direction and an intermediate portion in the extending direction of the rotation center axis CL3 of the rotating body 25).

  In addition, a hopper 71 for supplying the object to be conveyed to the object introduction hole 23B is provided above the object introduction hole 23B. The opening on the lower side of the hopper 71 and the opening of the transported object introduction hole 23B have the same form.

  In order to prevent the object to be conveyed from being caught between the closing portion 29 and the inner wall 23A of the housing 23 by the rotation of the rotating body 25, the object to be conveyed on the rear side in the rotation direction of the rotating body 25. The crossing angle θ5 between the inner wall 71A of the hopper 71 in the vicinity of the rear inlet part 23E, which is the part of the object inlet hole 23B, and the rotational direction of the rotating body 25 at the rear inlet part 23E, The crossing angle θ5 formed inside the hopper 71 is an obtuse angle (see FIG. 1).

  The transported object introduction hole 23B is provided directly above the housing 23 of the rotary feeder 21. For example, the shape of the transported object introduction hole 23B is formed symmetrically with respect to a plane including the rotation center axis CL3 of the rotating body 25 and extending in the vertical (vertical) direction.

  In addition, disc-shaped axial partition members 73 forming the recesses 27 are provided at both ends of the rotating body 25 in the extending direction of the rotation center axis CL3. An axial sealing device 75 that seals between the outside of the concave portion 27 and the concave portion 27 by sealing the outer peripheral portion of the member 73 is provided.

  Here, the axial sealing device 75 will be described in detail.

  6 is a cross-sectional view showing a schematic configuration of the axial sealing device 75, and is an enlarged view of a portion VI in FIG.

  In FIG. 6, the display of a sealing member such as an O-ring constituting the cylinder 79 is omitted.

  The axial sealing device 75 includes a ring located outside the axial partition member 73 (outside in the extending direction of the rotation center axis CL3 of the rotating body 25) and on the outer periphery of the axial partition member 73. A planar axial partition member outer peripheral portion 73A is provided. The axial partition member outer peripheral portion 73A is formed by integrally providing a ring-shaped member 74 made of, for example, a copper alloy on the axial partition member 73.

  The axial sealing device 75 is disposed substantially concentrically with the outer peripheral portion 73A of the axial partition member, and has an outer diameter larger than an outer diameter of the outer peripheral portion 73A of the axial partition member and on the outer diameter side. A thin plate-like fixing member 77 provided integrally with the housing 23 (provided so as not to rotate in the rotational direction of the rotating body 25) and having an inner diameter side surface in contact with the outer peripheral portion 73A of the axial partition member is provided. It has been. The fixing member 77 is made of, for example, chrome / molybdenum steel so that galling is less likely to occur between the outer peripheral portion 73A of the axial partition member. In addition, the inner diameter of the thin plate-like fixing member 77 coincides with the inner diameter of the outer peripheral portion 73A of the axial partition member.

  The axial sealing device 75 includes a piston 81 of a cylinder 79 that is provided in the housing 23 and that sandwiches the thin plate-like fixing member 77 in cooperation with the outer peripheral portion 73A of the axial partition member 73. The thin plate-like fixing member 77 is sandwiched between the outer peripheral portion 73A of the axial partition member and the piston 81 of the cylinder 79 with a weak force so as to be sealed.

  Note that the weak force of pinching allows the axial partition member outer peripheral portion 73 </ b> A and the thin plate-like fixing member 77 to come into contact with each other to generate a sealing effect, and the outer peripheral portion 73 </ b> A and the fixing member 77. This is a force that allows the rotating body 25 to rotate due to slippage.

  The piston 81 of the cylinder 79 is formed in, for example, a ring shape, and the inner diameter (for example, the inner diameter of the piston 81) of the planar fixing member contact portion 81A in contact with the thin plate-like fixing member 77 is the ring. The outer diameter of the fixing member contact portion 81A (for example, the outer diameter of the piston 81) is the outer diameter of the outer peripheral portion 73A of the axial partition member. Or slightly larger or slightly smaller than the outer diameter of the outer peripheral portion 73A of the axial partition member.

  By being configured as described above, the thin plate-like fixing member 77 can be sandwiched with substantially uniform pressure, and the sealing performance can be improved. Further, by improving the sealing performance, it is possible to reduce the amount of leakage of the compressed fluid that has come out of the compressed fluid ejection hole 67 to the outside of the housing 23, and the object to be conveyed can be efficiently conveyed.

  The thin plate-like fixing member 77 is provided in the casing 23 via an elastic member 83 such as rubber or synthetic resin having a spring constant smaller than that of metal. The elastic member 83 is formed in a ring shape, has an outer diameter that is the same as or slightly larger than the outer diameter of the thin plate-like fixing member 77, and has an inner diameter that is much larger than the outer diameter of the outer peripheral portion 73A of the axial partition member. It is formed slightly larger. The elastic member 83 is coaxial with the axial partition member 73 and the thin plate-shaped fixing member 77 on the side opposite to the piston 81 of the cylinder 79 with respect to the thin plate-shaped fixing member 77. Is provided.

  The elastic member 83 surrounds the outer periphery 73A of the axial partition member, in other words, the outer periphery of the outer side of the axial partition member 77 (the outer side in the extending direction of the rotation center axis CL3 of the rotating body 25). It is provided in a surrounding position.

  Then, when the piston 81 of the cylinder 79 protrudes to the outer peripheral portion 73A side of the axial partition member 73 and the thin plate-like fixing member 77 is sandwiched, the elastic member 83 is elastically deformed so as to contract. Even if the outer peripheral portion 73A of the axial partition member 73 is worn due to the elastic deformation of the elastic member 83 for many years, the thin plate-shaped fixing member 77 is not deformed excessively, and the axial seal It can be performed.

  In order to move the piston of the cylinder 79, it is necessary to supply hydraulic fluid to the ring-shaped pressure chamber 85. The hydraulic fluid is supplied to the supply passage 87 provided in the housing 23. Done through.

  Next, the operation of the rotary feeder 21 will be described.

  7-11 is a figure explaining the operation | movement of the rotary feeder 21. As shown in FIG.

  In this description of the operation, the rotating body 25 is continuously rotated, and the object to be conveyed is conveyed inside the housing 23 from the object introduction hole 23B toward the object discharge hole 23C. It is assumed that the object to be transported that has fallen on the transported material receiving portion 65 is transported to the next process by the compressed air ejected from the compressed fluid ejection hole 67.

  First, in the state shown in FIG. 7, the object introduction hole 23 </ b> B is blocked by the closing portion 29. On the other hand, the conveyed product discharge hole 23C is not blocked, and the conveyed product receiving portion 65 and the concave portion 27 communicate with each other, and the conveyed product falls from the concave portion 27 to the conveyed product receiving portion 65.

  At this time, since the conveyed object introduction hole 23B is closed, it is possible to suppress the compressed air ejected from the compressed fluid ejection hole 67 from exiting the conveyed object introduction hole 23B.

  Further, in the state shown in FIG. 7, the closing portion 29 is in contact with the sealing members 39 of the two circumferential sealing devices 35 positioned on the lower side to perform sealing.

  Then, even if the rotating body 25 rotates from the state shown in FIG. 7 to the state shown in FIG. 8, the object introduction hole 23B is blocked by the closing portion 29 and the object discharge hole 23C is blocked. However, the state where the conveyed product receiving portion 65 and the concave portion 27 are in communication continues. On the other hand, almost all the objects to be conveyed in the recess 27 communicating with the object to be conveyed discharge hole 23C are discharged to the object receiving part 65.

  Then, when the rotating body 25 rotates from the state shown in FIG. 8 to the state shown in FIG. 9, a part of the conveyed object introduction hole 23B is opened, the conveyed object passes through the conveyed object introduction hole 23B, It begins to enter the concave portion 27 of the rotating body 25 (the concave portion 27 communicating with the conveyed object introduction hole 23B).

  Further, even in the state shown in FIG. 9, the closing portion 29 is in contact with the sealing members 39 of the two circumferential sealing devices 35 located on the lower side to perform sealing.

  Then, when the rotating body 25 rotates from the state shown in FIG. 9 to the state shown in FIG. 10, the conveyed object introduction hole 23 </ b> B is fully opened, while the conveyed object discharge hole 23 </ b> C is blocked by the closing portion 29. .

  In the state shown in FIG. 10, the closing portion 29 is in contact with the sealing members 39 of the two circumferential sealing devices 35 located on the upper side for sealing.

  Then, even if the rotating body 25 rotates from the state shown in FIG. 10 to the state shown in FIG. 11, the object discharge hole 23C is blocked by the closing portion 29, and the object introduction hole 23B is blocked. The state of being in communication with the hopper 71 is not continued. In addition, in the state shown in FIG. 10, the introduction of the object to be conveyed into the recess 27 of the rotating body 25 (the recess 27 communicating with the object to be conveyed introduction hole 23B) is almost completed.

  Even in the state shown in FIG. 11, the closing portion 29 is in contact with the sealing members 39 of the two circumferential sealing devices 35 located on the upper side to perform sealing.

  Then, the rotating body 25 rotates from the state shown in FIG. 11 to the state shown in FIG.

  In addition, you may make it rotate the rotary body 25 intermittently. For example, the rotating body 25 may be temporarily stopped between the state shown in FIG. 7 and the state shown in FIG. By stopping in this way, it becomes easier for the conveyed object to fall from the conveyed object discharge hole 23C, and the conveyed object is lifted, that is, the conveyed object returns to the conveyed object introduction hole 23B again. Can be prevented.

  Furthermore, you may make it stop the rotary body 25 between the state shown in FIG. 10, and the state shown in FIG. By stopping in this way, it becomes easier for the conveyed object to fall into the casing 3 from the conveyed object introduction hole 23B.

  According to the rotary feeder 21, the rotary body 25 is provided with the closing portion 29 capable of temporarily closing the transported object discharge hole 23 </ b> C as the rotary body 25 rotates. By closing the transported object discharge hole 23C, the inflow of the compressed fluid ejected from the compressed fluid ejecting means (compressed fluid ejecting hole 67) into the housing 23 is temporarily suppressed. It is possible to prevent the compressed fluid from leaking out from the object introduction hole 23B, and the object to be conveyed can easily enter the casing 23 from the object to be conveyed introduction hole 23B, and the compressed fluid ejected from the compressed fluid ejection means. Thus, it is possible to suppress a decrease in the amount of compressed fluid (the amount of fluid flowing in the direction of the arrow AR11 shown in FIG. 1) for transporting the transported object that has exited from the transported object discharge hole 23C. It is possible to increase the conveying efficiency of Okubutsu.

  Further, according to the rotary feeder 21, the closed portion 29 can be temporarily closed by the closed portion 29 as the rotating body 25 rotates, so that the transferred object introducing hole 23B is closed. As a result, the compressed fluid ejected from the compressed fluid ejecting means flows out of the casing 23 (outflow passing through the transported object discharge hole 23C, the casing 23, and the transported object introducing hole 23B). ) Is suppressed, and the amount of compressed fluid that is ejected from the compressed fluid ejecting means and that conveys the object to be conveyed that has come out of the object discharge hole 23C (indicated by the arrow AR11 shown in FIG. 3) (Amount of fluid flowing in the direction) can be suppressed, and the conveyance efficiency of the object to be conveyed can be increased.

  Further, according to the rotary feeder 21, when one of the closed portions 29 closes the conveyed object discharge hole 23 </ b> C, the conveyed object introduction hole 23 </ b> B opens and the closed portion 29. When one of the closed portions 29 closes the conveyed object introduction hole 23B, the conveyed object discharge hole 23C is opened.

  Therefore, when the transported object discharge hole 23C is closed and the transported object introduction hole 23B is opened, the flow of the compressed fluid (compressed fluid ejected from the compressed fluid ejecting means) into the housing 23 is suppressed. Further, it is possible to suppress the outflow of the compressed fluid from the transported object introduction hole 23B and efficiently introduce the transported object into the housing 23.

  On the other hand, when the transported object introduction hole 23B is closed and the transported object discharge hole 23C is open, the transported object can be discharged from the transported object discharge hole 23C and out of the transported object introduction hole 23B. The amount of the compressed fluid (compressed fluid ejected from the compressed fluid ejecting means) is suppressed, and the transported object ejected from the compressed fluid ejecting means and transported from the transported object discharge hole 23C is transported. Therefore, it is possible to suppress a decrease in the amount of compressed fluid (the amount of fluid flowing in the direction of the arrow AR11 shown in FIG. 3), and increase the conveyance efficiency of the object to be conveyed.

  Further, it is possible to suppress the flow of the compressed fluid ejected from the compressed fluid ejecting means from the transported object receiving part 65 to the recessed part 27 communicating with the transported object receiving part 65. It is easy for the transported object to fall to the transported object receiving portion 65.

  Further, as the rotating body 25 rotates, each state (the state where the object discharge hole 23C is closed and the object introduction hole 23B is opened, or the object introduction hole 23B is closed and the object is detected). The state in which the conveyed product discharge hole 23 </ b> C is open is alternately shifted continuously, so that the conveyed product can be conveyed substantially continuously and efficiently.

  Further, according to the rotary feeder 21, each rotation direction partition member 33 is formed in a plate shape, and the closing portion 29 is formed in a plate shape provided on the front end side of each rotation direction partition member 33. Since it is formed of a member, the volume of the space (concave portion 27) for conveying the object to be conveyed in the rotating body 25 can be increased.

  Further, the member forming the closed portion 29 includes an arcuate outer peripheral surface 29A having a radius of curvature that is slightly smaller than the radius of curvature of the inner wall 23A of the casing 23. The gap between the inner wall 23A and the closed portion 29 is small, and therefore, the space between the spaces (concave portions) 27 in the casing 23 separated by the rotation axis direction partitioning member 33 is reduced. It is possible to reduce leakage of the conveyed product and leakage of the compressed fluid ejected from the compressed fluid ejecting means.

  Further, the length of the arc in the rotation direction of the rotating body 25 is longer than the length of the transported object introduction hole 23B and the transported object discharge hole 23C, and the rotation center axis CL3 of the rotating body 25 is extended in the extending direction. Since the closed portion 29 has an outer peripheral surface 29A having a length equal to or longer than the length of the transported object introduction hole 23B or the transported object discharge hole 23C, the transported object introduction hole 23B and the transported object The discharge hole 23C can be reliably closed.

  Furthermore, according to the rotary feeder 21, the three rotation direction partition members 33 are provided at substantially equally distributed positions in the rotation direction of the central member 31. When the object discharge hole 23C is closed, the conveyed object introduction hole 23B is opened, and when the object conveyance hole 23B is closed, the conveyed object discharge hole 23C is opened with a simple configuration. Can be realized.

  Each member constituting the closing portion 29 is provided to extend from the tip end portion of each rotation direction partition member 33 in a direction opposite to the rotation direction of the center member 31 (rotating body 25). Therefore, the transported object can be smoothly introduced from the transported object introduction hole 23B, and the transported object can be smoothly discharged from the transported object discharge hole 23C. Since there is little possibility that compressive stress is generated in the closed portion 29 by the rotation of the rotating body 25, the occurrence of buckling in the closed portion 29 can be prevented.

  Further, according to the rotary feeder 21, since the circumferential sealing device 35 for sealing between the recesses 27 adjacent to each other is provided in cooperation with the closing portion 29, the rotary shaft direction partition is provided. It is possible to further reduce the leakage of the object to be conveyed and the leakage of the compressed fluid ejected from the compressed fluid ejecting means between the spaces (recesses 27) in the casing 23 separated by the member 33. it can.

  Further, since the casing 23 is provided with the circumferential sealing device 35, the circumferential sealing device 35 can be provided more easily than the rotating body 25, and consumables (for example, wear) of the circumferential sealing device 35 can be provided. Maintenance is facilitated, such as easy replacement of the sealing member 39).

  Furthermore, according to the rotary feeder 21, the circumferential sealing device 35 blocks the transported object introduction hole 23 </ b> B and the transported object discharge hole 23 </ b> C regardless of the rotation angle of the rotating body 25. Since it is comprised, it can suppress further that the compressed fluid ejected from the said compressed fluid ejection means flows into the said to-be-conveyed object introduction hole 23B from the said to-be-conveyed object discharge hole 23C.

  Further, according to the rotary feeder 21, the form of the closed portion 29, the form of the transported object introduction hole 23B, the position where the transported object introduction hole 23B is provided, and the form of the transported object discharge hole 23C Since the relationship between the position where the transport object discharge hole 23C is provided and the position where the circumferential sealing device 35 is provided is an appropriate angle as described above, the transport object introduction hole 23B and It is possible to reliably block the object to be conveyed discharge hole 23C, and it is easy to reliably and efficiently convey the object to be conveyed.

  Further, according to the rotary feeder 21, the object receiving portion 65 is provided, the compressed fluid ejection hole 67 is provided, and the object to be conveyed is interposed between the object discharge hole 23 </ b> C and the compressed fluid ejection hole 67. Since the rectifying member 69 is provided to prevent the reverse flow of the object, the object to be transported that has dropped from the transport object discharge hole 23C can be efficiently transported to the next process.

  Further, according to the rotary feeder 21, a part 65A of the wall of the conveyed product receiving portion 65 is inclined, the rectifying member 69 is formed of a flat plate-like member, and is provided in parallel with the part of the inclined wall 65A. Therefore, with a simple configuration, it is possible to suppress stagnation of the transported object at the transported material receiving portion 65 and to prevent backflow of the transported object into the housing 23.

  Furthermore, according to the rotary feeder 21, the inner wall 71A of the hopper 71 in the vicinity of the rear inlet portion 27E, which is the portion of the conveyed object introduction hole 23B on the rear side in the rotation direction of the rotating body 25, and the rear introduction Since the crossing angle θ5 with the rotation direction of the rotating body 25 at the mouth portion 27E is an obtuse angle, during the operation of the rotary feeder 21, the space between the casing 23 and the rotating body 25 is Further, it is possible to prevent the conveyed object from being caught.

  Further, according to the rotary feeder 21, the transported object introduction hole 23B is provided immediately above the casing 23 of the rotary feeder 21, so that the transported object easily falls into the casing. The conveyance efficiency of the rotary feeder 21 can be increased.

  In addition, the said to-be-conveyed object introduction hole 23B may be provided in the position offset as shown in FIG.

  That is, the inner wall 71C of the hopper 71B (the wall positioned on the rear side in the rotation direction of the rotating body 25 and extending in the vertical direction) 71C is offset by the distance L1 with respect to the rotation center axis of the rotating body 25. The angle θ7 may be formed as an obtuse angle.

  Moreover, as shown in FIG. 13, the closing part 29 may be extended and provided in the both directions of the rotation direction of the said central member 31 (rotating body 25) from the front-end | tip part of each said rotation direction partition member 33. As shown in FIG. .

It is sectional drawing which shows schematic structure of the rotary feeder which concerns on embodiment of this invention. It is sectional drawing which shows schematic structure of the rotary feeder which concerns on embodiment of this invention. It is a figure which shows the IIIA-IIIB cross section in FIG. It is sectional drawing which shows schematic structure of the circumferential direction sealing device, and is the enlarged view of the IV section in FIG. It is a figure which shows the VA-VB arrow in FIG. It is sectional drawing which shows schematic structure of an axial direction sealing apparatus, and is an enlarged view of the VI section in FIG. It is a figure explaining operation | movement of a rotary feeder. It is a figure explaining operation | movement of a rotary feeder. It is a figure explaining operation | movement of a rotary feeder. It is a figure explaining operation | movement of a rotary feeder. It is a figure explaining operation | movement of a rotary feeder. It is a figure which shows the state provided in the position which offset the to-be-conveyed object introduction hole, and is a figure corresponding to FIG. It is a figure which shows the state which extended and provided the closing part in the both directions of the rotation direction of the rotary body from the front-end | tip part of each rotation direction partition member, and is a figure corresponding to FIG. It is sectional drawing which shows schematic structure of the conventional rotary feeder. It is sectional drawing which shows schematic structure of the conventional rotary feeder, and is a figure which shows the XVA-XVB cross section in FIG.

Explanation of symbols

21 Rotary Feeder 23 Housing 23A Inner Wall 23B Conveyed Object Introduction Hole 23C Conveyed Object Discharge Hole 23E Rear Inlet Port Portion 25 Rotating Body 27 Recess 29 Closed Portion 31 Center Member 33 Rotational Direction Partition Member 35 Circumferential Sealing Device 37 Protruding Portion 65 Conveyed object receiving part 65A Wall 67 Compressed fluid ejection hole 69 Rectifying member 71 Hopper 71A Inner wall 73 Axial partition member 73A Axial partition member outer peripheral part 75 Axial seal device 77 Fixing member 79 Cylinder 81 Piston CL3 Center axis CL5 Center line θ5 Intersection angle

Claims (15)

A casing having an inner wall; a transported object introduction hole provided in an inner wall of the casing for introducing a transported object from the outside of the casing into the casing; and an interior of the casing In order to discharge the transported object introduced into the casing from the inside of the casing to the outside of the casing, a transported object discharge hole provided in the inner wall of the casing and a rotatably disposed in the casing A rotary feeder comprising a plurality of recesses and a rotating body that conveys the object to be conveyed from the object to be conveyed introduction hole to the object to be conveyed discharge hole;
A rotary feeder in which a closing portion capable of temporarily closing the transported object discharge hole as the rotating body rotates is provided in the rotating body. The rotary feeder according to claim 1,
The rotary feeder is characterized in that the closed portion can temporarily close the transported object introduction hole as the rotating body rotates. The rotary feeder according to claim 2,
A plurality of the closing portions are formed in the rotating body at the portion of the rotating body located between the recesses, and one closing portion of these closing portions closes the transported object discharge hole. The transported object introduction hole is opened, and when the closed part of one of the closed parts closes the transported object introduction hole, the transported object discharge hole is opened. A rotary feeder characterized by that. The rotary feeder according to claim 3,
The rotating body includes a central member extending in the extending direction of the rotation central axis substantially coincident with the central axis in the extending direction of the inner wall of the casing formed in a cylindrical side surface shape. A plurality of rotation direction partition members are provided, and each of the plate-like rotation direction partition members extends in the extending direction of the rotation center axis, and a proximal end side is fixed to the center member, and a distal end portion The side extends to the vicinity of the inner wall of the housing,
Each said closing part is comprised by the member provided in the said front-end | tip part side of each said rotation direction partition member, and this member is an arc-shaped outer peripheral surface whose curvature radius is slightly smaller than the curvature radius of the said inner wall. The length of the arc in the rotation direction of the rotating body is longer than the length of the transported object discharge hole or the length of the transported object introducing hole, and the length of the rotating body in the rotation center axis direction is A rotary feeder having an outer peripheral surface that is the same as or longer than a length of a transported object introduction hole and a length of the transported object discharge hole. In the rotary feeder of any one of Claims 1-4,
The rotary feeder, wherein the casing is provided with a circumferential sealing device for sealing between the recesses adjacent to each other in cooperation with the closing portion. A casing having an inner wall; a transported object introduction hole provided in an inner wall of the casing for introducing a transported object from the outside of the casing into the casing; and an interior of the casing In order to discharge the transported object introduced into the casing from the inside of the casing to the outside of the casing, a transported object discharge hole provided in the inner wall of the casing and a rotatably disposed in the casing A rotary feeder comprising a plurality of recesses and a rotating body that conveys the object to be conveyed from the object to be conveyed introduction hole to the object to be conveyed discharge hole;
The casing is provided with a circumferential sealing device for sealing between the recesses adjacent to each other, and the circumferential sealing device is independent of the rotation angle of the rotating body. A rotary feeder characterized in that a gap is formed between a conveyed product introduction hole and the conveyed product discharge hole. A casing having an inner wall; a transported object introduction hole provided in an inner wall of the casing for introducing a transported object from the outside of the casing into the casing; and an interior of the casing In order to discharge the transported object introduced into the casing from the inside of the casing to the outside of the casing, a transported object discharge hole provided in the inner wall of the casing and a rotatably disposed in the casing A rotary feeder comprising a plurality of recesses and a rotating body that conveys the object to be conveyed from the object to be conveyed introduction hole to the object to be conveyed discharge hole;
The length in the rotational direction of the rotating body at the closing portion for closing the transported object introduction hole and the transported object discharge hole corresponds to a central angle of 60 ° centering on the rotation center axis of the rotating body. It has an arc length,
The transported object introduction hole and the transported object discharge hole are disposed at substantially point-symmetrical positions with respect to the rotation center axis of the rotating body, and the transported object introducing hole in the rotation direction of the rotating body. The arc length is shorter than the arc length corresponding to the central angle of 60 ° centered on the rotation center axis of the rotating body,
The casing is provided with a circumferential sealing device for cooperating with the closing portion to seal between the recesses adjacent to each other.
A protruding portion slightly protruding from the inner wall of the housing toward the rotating body, the protruding portion having a predetermined width in the rotating direction of the rotating body and extending in the extending direction of the rotation center axis of the rotating body, The circumferential sealing device is configured to seal in contact with the outer peripheral surface of the closing portion,
The rotation direction of the rotating body at a position corresponding to a central angle of ± 60 ° around the rotation center axis of the rotating body with reference to the center line of the transported object introduction hole in the rotating direction of the rotating body The center of the projecting part is located at a position corresponding to the central angle of ± 120 °, and the center of the projecting part in the rotation direction of the rotating body is located, so that four projecting parts are provided.
Any one of the projecting portions is in contact with the closing portion so as to block between the transported object introduction hole and the transported object discharge hole regardless of the rotation angle of the rotating body. It is comprised in the rotary feeder characterized by the above-mentioned. In the rotary feeder of any one of Claims 1-7,
The transported object introduction hole is provided on the upper side of the casing; the transported object discharge hole is provided on the lower side of the casing;
Below the transferred object discharge hole, a transferred object receiving portion for receiving the transferred object discharged from the transferred object discharge hole and sending it to the next process is provided.
A compressed fluid ejecting hole for ejecting a compressed fluid for pumping the received transported object is provided below the transported object receiving part.
A rotary feeder, characterized in that a rectifying member is provided between the transported object discharge hole and the compressed fluid ejection hole to prevent the transported object from flowing backward. The rotary feeder according to claim 8,
The wall in the vicinity of the compressed fluid ejection hole in the transported object receiving portion is inclined obliquely to prevent the transported object that has fallen from the transported object discharge hole from being retained,
The rectifying member is constituted by a plate-like member, and is inclined obliquely in the same tendency as the obliquely inclined wall. The rotary feeder according to any one of claims 1 to 9,
The transported object introduction hole is provided on the upper side of the housing; the transported object discharge hole is provided on the lower side of the housing;
On the upper side of the conveyed object introduction hole, a hopper for supplying the conveyed object to the conveyed object introduction hole is provided,
In order to prevent the object to be conveyed between the closed portion and the inner wall of the housing, a rear introduction port part which is a part of the object introduction hole on the rear side in the rotation direction of the rotating body The crossing angle between the inner wall of the hopper in the vicinity of the hopper and the rotation direction of the rotating body at the rear introduction port portion, and the crossing angle formed inside the hopper is an obtuse angle Rotary feeder. The rotary feeder according to claim 10,
The rotary feeder, wherein the transported object introduction hole is provided immediately above the casing of the rotary feeder. The rotary feeder according to any one of claims 1 to 11,
Disc-shaped axial partition members that form the recesses are provided at both ends of the rotating body in the extending direction of the rotation center axis,
A rotary feeder characterized in that an axial sealing device is provided for sealing between the outside of the recess and the recess by sealing the outer periphery of each axial partition member. The rotary feeder according to claim 12,
The axial sealing device is
A ring-shaped axial partition member outer peripheral portion located outside and on the outer periphery of the axial partition member;
The outer peripheral portion of the axial partition member is disposed substantially concentrically, and the outer diameter is larger than the outer diameter of the outer peripheral portion of the axial partition member. A thin plate-shaped fixing member that is in contact with the outer peripheral portion of the axial partition member;
A piston of a cylinder provided in the casing and sandwiching the thin plate-like fixing member in cooperation with an outer peripheral portion of the axial partition member;
The rotary feeder is configured to seal by sandwiching the thin plate-like fixing member between the outer peripheral portion of the axial partition member and the piston of the cylinder with a weak force. A casing having an inner wall; a transported object introduction hole provided in an inner wall of the casing for introducing a transported object from the outside of the casing into the casing; and an interior of the casing In order to discharge the transported object introduced into the casing from the inside of the casing to the outside of the casing, a transported object discharge hole provided in the inner wall of the casing and a rotatably disposed in the casing A rotary feeder comprising a plurality of recesses and a rotating body that conveys the object to be conveyed from the object to be conveyed introduction hole to the object to be conveyed discharge hole;
The transported object introduction hole is provided on the upper side of the housing; the transported object discharge hole is provided on the lower side of the housing;
Below the transferred object discharge hole, a transferred object receiving portion for receiving the transferred object discharged from the transferred object discharge hole and sending it to the next process is provided.
A compressed fluid ejecting hole for ejecting a compressed fluid for pumping the received transported object is provided below the transported object receiving part.
A rotary feeder, characterized in that a rectifying member is provided between the transported object discharge hole and the compressed fluid ejection hole to prevent the transported object from flowing backward. In a sealing device for sealing between a recess provided on a rotating body provided rotatably in a housing and the outside of the recess in the extending direction of the rotation center axis of the rotating body,
At both ends of the rotating body in the extending direction of the rotation center axis, disc-shaped axial partition members that form the recesses in the extending direction of the rotation center axis are provided,
A ring-shaped axial partition member outer peripheral portion located outside and on the outer periphery of the axial partition member;
The outer peripheral portion of the axial partition member is disposed substantially concentrically, and the outer diameter is larger than the outer diameter of the outer peripheral portion of the axial partition member. A thin plate-shaped fixing member that is in contact with the outer peripheral portion of the axial partition member;
A piston of a cylinder provided in the casing and sandwiching the thin plate-like fixing member in cooperation with an outer peripheral portion of the axial partition member;
The outer peripheral portion of each axial partition member is sealed by sandwiching the thin plate-like fixing member with a weak force between the outer peripheral portion of the axial partition member and the piston of the cylinder. A sealing device configured to seal between the recesses.

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