JP7182785B2 - Collecting device for granular materials - Google Patents

Description

TECHNICAL FIELD The present invention relates to a collecting device for particulate material that collects particulate material that is pneumatically transported.

2. Description of the Related Art Conventionally, there has been known a collection device for a particulate material that collects a particulate material that is pneumatically transported. In such a collection device, when the discharge port of the discharge pipe provided at the lower end is open, it becomes difficult to transport the granular material. body) is provided.
For example, in the following Patent Document 1, a suction type in which a cover body that waits by forming a predetermined gap from the lower end of the material discharge port at the bottom of the collector body is suspended by a hanging member and supported. A particulate collector is disclosed. In this collector, when a suction force is applied from the gas suction port of the collector body, the cover is lifted from the standby position to close the material discharge port.

JP 2005-239293 A

In the above collector, even if the granular material is stuck between the material discharge port and the lid, it is sucked when the lid is closed, thereby suppressing the powdery or granular material from being caught. It was something that could be done. However, in this collector, since the cover is suspended and supported by the hanging member made of a flexible material, the behavior of the cover becomes unstable when it is displaced to the opening side and the closing side. I was worried it would be easier.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a particulate material collecting device capable of stably opening and closing a discharge port while preventing the particulate material from being caught. It is intended to

In order to achieve the above-mentioned object, a collecting apparatus for powdery or granular material according to the present invention comprises: a discharge pipe having a lower open end surface inclined with respect to an axial direction; and an open end surface of the discharge pipe. a cover having a substantially flat plate-shaped cover portion that is held at a standby position with a gap therebetween and is drawn to a closed position; a pair of support shafts provided on both sides in the first direction and axially along the first direction on the upper side of the lid portion in the closed position; Bearing holes through which the pair of support shafts are respectively inserted are provided on both sides in the first direction, and these bearing holes are located between the lid portion side edge of each bearing hole and the support shaft in the closed position. It is characterized by having an elongated hole shape extending generally in the thickness direction of the lid so as to form a gap larger than the granular material.

The particulate material collection device according to the present invention is configured as described above, so that it is possible to prevent the particulate material from being caught and to stably open and close the discharge port. can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view, partly cut away, schematically showing an example of a collecting device for powdery or granular material according to an embodiment of the present invention. (a) is a partially omitted schematic rear view of the same collection device, and (b) is a partially cutaway schematic vertical cross-sectional view corresponding to the X1-X1 line arrow in FIG. 2(a). 2(a) and 2(b) are schematic vertical sectional views partially broken away corresponding to FIG. 2(b). 2(a) and 2(b) are schematic vertical cross-sectional views, partially cut away, corresponding to the X2-X2 line in FIG. 2(a).

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
It should be noted that some of the detailed reference numerals attached to other drawings are omitted in some of the drawings.
Further, in the following embodiments, directions such as the vertical direction will be described with reference to the state in which the collecting device for powdery or granular material according to the present embodiment is installed.
1 to 4 are diagrams schematically showing an example of a particulate material collecting device according to the present embodiment.

As shown in FIGS. 1 and 2(b), the powdery or granular material collecting device 1 according to the present embodiment is provided with an inlet 19 for receiving the powdery or granular material to be pneumatically transported so that the powder can be extracted from the transport air. It is configured to separate and collect the granular material. The collection device 1 includes a collector main body 10, a discharge pipe 15 provided on the lower end side of the collector main body 10 and having an opening end surface 16 at the lower end that is inclined with respect to the axial direction, and a lid body 30 constituting a valve body (damper) for opening and closing the discharge port 17 of the discharge pipe 15 . In this embodiment, the collection device 1 includes a suction connection pipe 12 that constitutes a suction port connected to a suction source 2, and is pneumatically transported by suction from a transportation source (material source) 4. is separated from the transport air and collected. In the following description, the direction perpendicular to the inclination direction and the vertical direction of the opening end face 16 will be described as a first direction, and the direction perpendicular to the first direction and the vertical direction will be described as a second direction.

Further, although the powdery or granular material here refers to a powdery or granular material, it may be of any shape as long as it can be pneumatically transported. For example, the granular material may be substantially spherical, substantially columnar, substantially cubic, polyhedral, flaky, short fiber flakes, or the like. Moreover, all the granular materials are not limited to having the same size and shape. Granular materials having variations in shape and size may also be used. Also, the size of the granular material may be 10 mm or less, 5 mm or less, or 3 mm or less. The size of the granular material indicates the maximum size when there is variation, the diameter when the shape is substantially spherical, and the length of the longest portion when the shape is not spherical.
Moreover, as the granular material, any kind of material such as synthetic resin materials such as resin pellets and resin fiber pieces, metal materials, semiconductor materials, wood materials, chemical materials, and food materials may be used. Examples of the powdery material include natural material (virgin material), pulverized material, masterbatch material, various additives, and the like in the case of molding a synthetic resin molded product. Moreover, it is good also as a structure containing reinforcing fibers, such as a glass fiber and a carbon fiber.

The suction source 2 may be an air suction source such as a suction blower connected via an air suction pipe 3 . Such a suction source 2 is not limited to the one dedicated to the collection device 1. For example, a mode in which transportation to the collection device 1 and transportation to another device are switched by a switching valve or the like. It can be a thing.
The transportation source 4 includes a material tank connected via a material transportation pipe 5, a drying hopper, a weighing hopper for weighing the granular materials, and a blending hopper for blending a plurality of types of granular materials at a predetermined ratio. There may be. Also, a temporary storage section provided downstream of these various hoppers may be used as the transportation source 4 . Moreover, it is not limited to a mode in which the material transport pipe 5 connected to the collecting device 1 is connected to a single transportation source 4 and a single granular material is collected in the collecting device 1 . For example, a material transport pipe 5 connected to the collection device 1 is connected to a plurality of transport sources 4 that respectively store different powder materials, and a plurality of types of powder particles from these multiple transport sources 4 are collected. The material may be collected in the collection device 1 concerned.

Further, the supply destination of the collecting device 1 may be a storage tank, a storage hopper, or the like that temporarily stores the granular material collected by the collecting device 1. A drying hopper that dries the powdery material may be used as the supply destination. As for the supply destination of the collecting device 1, the cover 30, which is in the open position for opening the discharge port 17 by the granular material, can swing toward the closing side as the material level decreases, as will be described later. The processing (consumption) of the granular material may be performed as described above. For example, the collection device 1 may be supplied to a molding machine such as an injection molding machine. In this case, the collecting device 1 may be installed directly on the molding machine. The molding machine to be supplied is not limited to an injection molding machine for molding synthetic resin molded products, and may be an injection molding machine for other materials, or an extrusion molding machine or compression molding machine for various materials. It is good also as the aspect which makes another molding machine the supply destination. Further, the supply destination of the particulate material collected by the collection device 1 is not limited to a single supply destination, and may be a plurality of supply destinations.

The collector main body 10 has a hopper shape with an upper part having a substantially cylindrical shape and a lower part having a substantially inverted conical shape. The collector main body 10 may have a substantially cylindrical shape or a substantially rectangular tube shape. The collector main body 10 is not limited to a hopper shape, and may be a tank shape or a drum shape. Moreover, in the example of drawing, the example which provided the window part 14 which can visually recognize the inside of the collector main body 10 in the surrounding wall part of the collector main body 10 is shown.
The collector main body 10 is provided with a suction connection pipe 12 that constitutes a suction port that opens in the collector main body 10 . The drawing shows an example in which the suction connection pipe 12 connected to the suction source 2 is provided in an upper end cover 11 provided at the upper end of the collector main body 10 so as to be freely opened and closed. The suction connection pipe 12 is connected to the side peripheral portion of the upper end cover 11 and has a structure in which a suction port is opened on the inner peripheral side of the upper end cover 11 . The suction connection pipe 12 may be connected substantially orthogonally to the side circumference of the upper end cover 11 so that the suction port opens generally tangentially to the inner circumference of the upper end cover 11 . may be connected to Instead of connecting the suction connecting tube 12 to the side peripheral portion of the upper end cover 11, it may be connected to the upper end portion constituting the bottom portion.

The collector main body 10 is also provided with a separation mechanism 13 for separating the particulate material from the transport air directed to the suction connection pipe 12 . As such a separation mechanism 13, any mechanism may be used as long as it can separate the granule material and the transport air. It may be made of a filter such as a punching metal or a net-like (mesh-like) perforated plate-like body that prevents passage of materials. The figure shows an example in which a separation mechanism 13 is provided so as to cover an upper opening that is opened and closed by an upper end cover 11 of the collector main body 10 . Further, in the illustrated example, the separation mechanism 13 is composed of an outer peripheral side tubular portion formed in a tubular shape so as to extend toward one side in the vertical direction from the outer peripheral side edge portion, and a leading end portion of the outer peripheral side tubular portion in the extending direction. and an inner peripheral side tubular portion formed in a tubular shape so as to extend toward the other side in the up-down direction so as to be folded back from the inner peripheral side tubular portion. Note that the separation mechanism 13 is not limited to such a shape, and instead of a generally flat plate-like member or a perforated plate-like member, the inside of the collector body 10 may be It may have a baffle umbrella shape provided with a gap between the peripheral surface and the inner top surface. In addition, it is possible to adopt the separating mechanism 13 having various configurations. Moreover, as such a separation mechanism 13, a so-called cyclone system may be used that separates the granular material from the transport air.

The introduction port 19 is provided so as to open at the lower end side of the collector main body 10 . In this embodiment, the introduction port 19 is opened in the inner peripheral surface of the discharge pipe 15 . That is, the introduction pipe 18 forming the introduction port 19 is connected to the discharge pipe 15 . In addition, the contact surface 32 of the lid 30 is arranged parallel to the opening end surface 16 in the closed position so that at least the lower portion of the inlet 19 is positioned at the same height as the upper portion of the outlet 17. It is configured so as to open toward. That is, as shown in FIG. 2A, at least the lower portion of the introduction port 19 and the upper portion of the discharge port 17 overlap when viewed in the second direction. With such a configuration, compared to the one in which the material introduction pipe is opened downward in the hopper or the one in which the introduction pipe is connected to the discharge pipe on the upper side of the valve body that is horizontally moved, It is possible to effectively reduce the space where the granular material tends to stay up to the cover 30 on the lower side of the inlet 19, and improve the fluidity of the granular material introduced through the inlet 19. be able to. That is, the introduction port 19 is provided in the vicinity of the lid 30 that seals the lower end of the flow space, and the granule material is introduced together with the transport air toward the contact surface 32 of the lid 30, which is an inclined surface. Therefore, the powder material can be smoothly flowed by the upward air current.

At least the lower part of the introduction port 19 positioned at the same height as the upper part of the discharge port 17 is a height part of 1/4 or more of the inner diameter along the vertical direction of the introduction port 19 from the lower edge of the introduction port 19. In the illustrated example, the height is about 1/2 of the height. That is, the substantially lower half of the inlet 19 is positioned at the same height as the upper portion of the outlet 17 . In addition, instead of such a mode, a configuration may be adopted in which substantially the lower quarter of the introduction port 19 or more is positioned at the same height as the upper portion of the discharge port 17 , and substantially the entire introduction port 19 is located at the discharge port 17 . may be positioned at the same height as

The discharge pipe 15 is provided on the lower end side of the substantially inverted cone-shaped portion of the collector body 10 . The discharge pipe 15 has a substantially cylindrical shape with an axial direction along the vertical direction. Although the discharge pipe 15 may have a substantially square tubular shape, it is assumed to have a substantially cylindrical shape in the present embodiment.
An opening end face 16, which is the lower end face of the discharge pipe 15, is an inclined face facing obliquely downward. The angle of inclination of the opening end face 16 with respect to the horizontal plane (the plane perpendicular to the direction in which its own weight falls) (the angle between the horizontal plane in contact with the lower end 16a of the opening end face 16 and the opening end face 16) is determined from the viewpoint of space saving, dischargeability, You may make it set suitably from a viewpoint of the opening-and-closing property etc. by the cover body 30 mentioned later. If the angle of inclination of the opening end face 16 with respect to the horizontal plane is too small, the dischargeability and opening/closing properties tend to deteriorate. There is

From the above point of view, for example, the angle of inclination of the opening end face 16 with respect to the horizontal plane may be about 20 degrees to 80 degrees, preferably about 30 degrees to 60 degrees, and is about 45 degrees in the figure. example. With such a configuration, when the lid body 30 is in the standby position described later, the angle of inclination of the contact surface 32 of the lid body 30 with respect to the horizontal plane is greater than or equal to the angle of inclination of the opening end face 16. is equal to or greater than the angle of repose, and the discharge property of the granular material can be improved.
The introduction pipe 18 is connected to the side periphery of the discharge pipe 15 . The introduction pipe 18 is connected to the discharge pipe 15 so that its axis is substantially flush with the axis of the discharge pipe 15 .
Further, in the present embodiment, at least the discharge pipe vicinity portion 18 a of the introduction pipe 18 is formed in a downward slope shape that slopes downward toward the introduction port 19 . With such a configuration, compared to the case where the introduction pipe 18 is connected to the discharge pipe 15 horizontally or in an upward slope, the introduction of the powdery or granular material when discharging the introduced powdery or granular material Backflow to the pipe 18 side and retention in the introduction pipe 18 can be effectively suppressed.

In the present embodiment, not the entire introduction pipe 18, but the downstream end portion 18a near the discharge pipe is formed into a slanted pipe shape that slopes downward toward the connecting portion with the discharge pipe 15. A portion on the upstream side of the portion 18a (portion on the side of the transportation source 4) is configured to have a horizontal tubular shape with an axial direction along a substantially horizontal direction. In other words, the introduction pipe 18 has a configuration in which it is bent at a midpoint in the axial direction. The angle of inclination with respect to the horizontal plane and the dimension along the axial direction of the downstream end portion 18a formed in an inclined tubular shape are such that when the exhaust pipe 15 is substantially filled with the powdery or granular material, the powdery or granular material flows upstream of the introduction pipe 18. The angle of inclination and the dimension along the axial direction may be appropriately set so as not to cause backflow of the material and from the viewpoint of dischargeability of the granular material that has entered the downstream end portion 18a. In the illustrated example, the inclination angle of the downstream end portion 18a with respect to the horizontal plane is about 45 degrees. It should be noted that the introduction pipe 18 is not limited to one that is bent in the middle in the axial direction, and may be one that is bent in a curved shape. Also, the introduction pipe 18 may be formed in an inclined tubular shape along the entire axial direction. Instead of such a mode, the introduction pipe 18 may be connected to the discharge pipe 15 horizontally or in an upward slope. Further, in the illustrated example, the introduction pipe 18 has a substantially cylindrical shape, but it may have a substantially rectangular tubular shape.

Further, in the present embodiment, an imaginary line (one-dot chain line in FIG. 2(b)) passing through the axial center of the downstream end portion 18a when viewed in the first direction and the contact surface 32 of the lid body 30 in the closed position. The angle θ is set to 90 degrees or more. With such a configuration, while it is possible to suppress the backflow to the introduction pipe 18 side, it is possible to smoothly generate an upward airflow compared to the case where the angle θ of the same is made an acute angle. . In the illustrated example, the angle θ between the imaginary line passing through the axial center of the downstream end 18a and the contact surface 32 of the cover 30 at the closed position is approximately 90 degrees. , preferably 140 degrees or less, more preferably 120 degrees or less. Alternatively, the angle θ may be less than 90 degrees.

In the present embodiment, the cover 30 is configured to close the discharge port 17 by the action of the suction force of the suction source 2 and to be opened by the load of the falling (flowing down) granular material. The lid 30 has a substantially flat lid portion 31 which is sucked from a waiting position held with a gap from at least the lower end 16a side of the opening end face 16 of the discharge pipe 15 to a closed position. ing. With such a configuration, the powdery or granular material adheres to the contact surface 32 which is the upper surface of the lid portion 31 facing the lower end 16a side of the opening end face 16 to which the powdery or granular material tends to adhere due to static electricity or the like. Even in such a case, the granular material can be sucked when the lid portion 31 is sucked up toward the opening end face 16 side, and biting can be suppressed. As a result, it is possible to suppress the leakage of the sucked air caused by the powdery material being caught, and to smoothly transport the powdery material. The gap between the lid portion 31 and the opening end face 16 may be made larger than the size of the powdery or granular material described above. The gap between the lid portion 31 and the opening end face 16 may be about 1.1 to 5 times the size of the granular material, or may be 3 times or less.
In the present embodiment, the lid 30 is held so that a gap is formed over the entire circumference between the lid 31 and the open end face 16 at the standby position. With such a configuration, it is possible to more effectively suck the granular material adhering to the peripheral portion of the opening end face 16 and the contact surface 32 of the lid portion 31 .

The cover portion 31 has a substantially flat plate shape and is arranged with its thickness direction along a direction substantially perpendicular to the opening end face 16 in a state where the discharge port 17 of the discharge pipe 15 is closed. One surface in the thickness direction of the lid portion 31 constitutes a contact surface 32 that contacts the opening end surface 16 .
The lid portion 31 is formed larger than the discharge port 17 so as to be able to close the discharge port 17 of the discharge pipe 15 . In other words, the outer dimensions of the lid 31 when viewed in the thickness direction are larger than the outer dimensions of the opening end face 16 of the discharge pipe 15 facing the obliquely downward side. is designed to be large.
In the lid body 30, the lid portion 31 is displaced substantially orthogonally to the opening end face 16 at a position near the opening end face 16, and is displaced around an axis (support shaft 23) along the first direction at a position away from the opening end face 16. It is configured such that the portion 31 is displaced so as to rotate in general. 2(b), the lid 30 is in a closed position where the lid 31 abuts against the open end face 16 to close the discharge port 17, and the lid 31 closes the discharge port 17. It is displaceable between an open position and an open position. The figure shows an example in which the lid portion 31 is arranged in the open position with its thickness direction substantially parallel to the horizontal direction. Then, the lid portion 31 may be partially overlapped with the discharge port 17 .

In this embodiment, the lids 30 are provided on both sides of the discharge pipe 15 in the first direction and above the lid 31 in the closed position, and extend axially in the first direction. It is held by a pair of support shafts 23, 23 aligned. Further, on both sides of the lid 30 in the first direction, a pair of support shafts 23, 23 are respectively inserted, and elongated bearing holes 35, 35 extending generally in the thickness direction of the lid 31 are provided. is provided. Further, the lid 30 is moved from the standby position to the closed position by moving the lid 31 generally along the major axis direction of the bearing holes 35 , 35 . With such a configuration, the lid 30 is rotated around the support shafts 23, 23 to be displaced to the open side, and the lid 31 is moved from the standby position along the longitudinal direction of the bearing holes 35, 35 generally. and displace to the closing side. As a result, the behavior of the lid 30 displaced to the opening side and the closing side can be stabilized compared to the case where the lid is swingably suspended by a string-like or chain-like suspension member.

Further, in the present embodiment, the lid body 30 is in a natural state supported by the spindles 23, 23 (no suction force or load of the granular material is applied, and the lid body 30 is in a state other than the spindles 23, 23). is not in contact), the contact surface 32 of the lid portion 31 is parallel to the opening end face 16, or the gap increases downward. With such a configuration, when the lid portion 31 is displaced to the closing side, the lower end 31a side of the lid portion 31 is less likely to be displaced toward the opening end surface 16 than the upper end 31b side. The lid portion 31 can be displaced to the closing side so that the contact surface 32 of the lid portion 31 becomes substantially parallel. As a result, it is possible to effectively suppress the entanglement of the granular material, compared to the case where the clearance on the lower end 31a side, to which the granular material tends to adhere due to static electricity or the like, is made smaller than that on the upper end 31b side. . In this embodiment, the lid 30 is configured such that the contact surface 32 of the lid portion 31 is parallel to the opening end surface 16 in a natural state. That is, the lid 30 is configured such that the contact surface 32 of the lid 31 is positioned parallel to the opening end surface 16 by its own weight in a natural state supported by the support shafts 23 , 23 .

Further, in the present embodiment, the bearing holes 35, 35 on both sides in the first direction are integrally provided so as to extend in the thickness direction of the lid portion 31 from both side portions in the first direction of the lid portion 31. , 34. With such a configuration, the lid portion 31 and the held piece portions 34, 34 may be constructed by joining separate members, or may be constructed such that the lid body is suspended and supported by the suspension member as described above. Compared to the conventional type, it is possible to suppress aging deterioration due to repeated impacts caused by opening and closing. Instead of such a mode, the lid 30 may be formed by joining the lid 31 and the held piece portions 34, 34 which are separate bodies.

The held piece portions 34, 34 on both sides in the first direction include bearing holes 35, 35 provided respectively, and are provided so as to overlap each other when viewed in the first direction. These pieces to be held 34, 34 are provided at positions shifted upward in the tilt direction of the lid portion 31. As shown in FIG. Further, as shown in FIG. 2(a), the held piece portions 34, 34 are provided on both sides of the discharge pipe 15 in the first direction with a space therebetween in the first direction. The gap between the held piece portions 34, 34 and the discharge pipe 15 may be made larger than the size of the powdery or granular material described above. With such a configuration, it is possible to prevent the granular material from being caught between the held piece portions 34, 34 and the discharge pipe 15, and to prevent malfunction of the lid portion 31. be able to. The gap between the held piece portions 34, 34 and the discharge pipe 15 may be about 1.1 to 5 times the size of the granular material, or may be 3 times or less, as described above.
These held piece portions 34 and 34 and bearing holes 35 and 35 are formed so that the contact surface 32 of the lid portion 31 is parallel to the opening end surface 16 in the natural state as described above.

As shown in FIG. 4(b), the bearing holes 35, 35 on both sides in the first direction are located between the cover side hole edges 37, 37 of the bearing holes 35, 35 and the support shafts 23, 23 in the closed position. The holes are elongated so that a gap D3 larger than the granular material is formed. With such a configuration, when the lid portion 31 is displaced to the closing side, the particulate material adheres between the lid portion side hole edges 37, 37 of the bearing holes 35, 35 and the support shafts 23, 23. Even in such a case, it is possible to prevent the granular material from being bitten at the relevant portion, and it is possible to prevent the lid portion 31 from being closed poorly. Since the bearing holes 35, 35 on both sides in the first direction have the same configuration, one of them will be described below as an example.
The major diameter D of the bearing hole 35 (dimension along the major diameter direction from the hole rim 36 on the side opposite to the lid portion to the hole rim 37 on the lid portion side) 32 and the opening end face 16 are parallel to each other) to the closed position. 37 to the support shaft 23 along the longitudinal direction plus a gap D3. The dimensions of this gap D3 along the major axis direction and the minor axis direction may be larger than the size of the powdery or granular material described above. , or 3 times or less.

Further, in this embodiment, of the hole edges 38 and 39 on both sides in the minor axis direction of the bearing hole 35, the upper hole edge 38 facing the upper surface side of the support shaft 23 is provided so as to extend in the thickness direction of the lid portion 31. configuration. With such a configuration, the lid portion 31 can be smoothly displaced to the closing side with the upper hole edge 38 along the support shaft 23 .
In addition, of the hole edges 38 and 39 on both sides of the bearing hole 35 in the minor axis direction, the lower hole edge 39 facing the lower surface side of the support shaft 23 has the minor axis of the bearing hole 35 that is closer to the cover than the side opposite to the lid portion. It has a configuration in which an inclined portion inclined with respect to the upper hole edge 38 is provided so as to be larger on the portion 31 side. With such a configuration, there is play with respect to the support shaft 23 on the lid portion 31 side of the bearing hole 35 . As a result, when the lid portion 31 is displaced to the closing side, the width of the bearing hole 35 is set to correspond to the shaft diameter D1 of the support shaft 23 over the entire lengthwise direction. The support shafts 23, 23 on both sides can be prevented from getting caught in the hole edges 38, 38, 39, 39 of the bearing holes 35, 35, and the lid part 31 can be closed more smoothly. can be displaced to the side.

In this embodiment, the lower hole edge 39 is formed as an inclined portion that is inclined with respect to the upper hole edge 38 over substantially the entirety so that the minor axis of the bearing hole 35 increases toward the lid portion 31 side. and In other words, the lower hole edge 39 is inclined so as to be separated from the upper hole edge 38 in the direction from the opposite lid side hole edge 36 to the lid side hole edge 37 . In addition, instead of such a mode, an inclined portion is provided at a portion of the lower hole edge 39 opposite to the lid portion, and a portion closer to the lid portion 31 than the inclined portion is parallel to the upper hole edge 38. It is good also as an aspect. That is, the short diameter of the portion of the bearing hole 35 on the side of the lid portion 31 may be substantially the same throughout the long diameter direction.
Moreover, the minor diameter of the end opposite to the lid portion, which is the smallest minor diameter portion of the bearing hole 35, may be a diameter corresponding to the shaft diameter D1 of the support shaft 23, and is slightly larger than the shaft diameter D1. Anything is fine. In addition, the short diameter of the end portion on the side of the lid portion 31, which is the maximum short diameter portion of the bearing hole 35, is appropriately selected from the viewpoint of suppressing the support shaft 23 from being caught as described above and from the viewpoint of suppressing excessive backlash. It may be the diameter, for example, it may be about 1.1 to 1.5 times the minor axis of the end on the opposite side of the lid. Alternatively, the short diameter of the bearing hole 35 may be set to correspond to the shaft diameter D1 of the support shaft 23 over the entire long diameter direction.

The support shafts 23, 23 on both sides in the first direction are provided along the first direction and coaxially with each other. These support shafts 23, 23 are provided so as to be located at positions that are closer to the upper end 16b side of the opening end surface 16 in the second direction than the axial center of the discharge pipe 15 when viewed in the first direction. Further, when the cover 30 is in the standby position, the support shafts 23, 23 are arranged on an imaginary line orthogonal to the contact surface 32 connecting the support shafts 23, 23 and the contact surface 32 so that the upper end 16b of the opening end surface 16 is positioned. is positioned approximately.
Further, in this embodiment, a cover portion 20 is provided so as to surround the discharge pipe 15 and to accommodate the discharge pipe 15 and the lid body 30 . With such a configuration, the lid 30 that is opened and closed can be protected. Further, in this embodiment, the support shafts 23, 23 are provided on the cover portion 20. As shown in FIG.

As shown in FIG. 2 , the cover portion 20 is a flange-like member provided so as to protrude radially outward from the boundary portion between the substantially inverted cone-shaped portion of the collector body 10 and the discharge pipe 15 . and peripheral walls 21, 22, 22, and 24 provided so as to hang down from the periphery of the top plate. In this embodiment, the cover portion 20 is composed of a front wall portion 21 and a rear wall portion 24 which are spaced apart in the second direction and substantially parallel to each other, and which are spaced apart in the first direction and substantially parallel to each other. It has a substantially rectangular tubular shape with side wall portions 22, 22 provided on both sides. In addition, the front wall portion 21, the side wall portions 22, 22 on both sides, and the rear wall portion 24 are provided with flange portions that are joined to an installation target such as a supply destination so as to protrude radially outward. It is configured.

Further, the above-described introduction pipe 18 is provided so as to pass through the front wall portion 21 . Further, the lid portion 31 in the open state is brought close to the rear wall portion 24 . Also, the side wall portions 22, 22 on both sides are provided with support shafts 23, 23 on both sides in the first direction, respectively. In the illustrated example, support shafts 23, 23 are provided so as to pass through the side wall portions 22, 22, respectively. These support shafts 23 , 23 may be detachable from the cover portion 20 on the outer sides of the side wall portions 22 , 22 . With such a configuration, the cover 30 can be removed by removing the support shafts 23, 23, and cleaning and maintenance can be easily performed. In the illustrated example, a part (lower end portion) of the lid portion 31 slightly protrudes from the lower end opening of the cover portion 20 when opened and closed. Alternatively, it may be configured such that the lower end portion of the discharge pipe 15 also protrudes. Further, when the lower end opening of the cover portion 20 is airtightly connected to the supply destination and the supply destination side is in a sealed state, the peripheral wall portion (the front wall portion 21, the side wall portions 22 and 22 on both sides, and the rear wall portion 24 ) or the like may be provided with an air circulation hole at an appropriate place. By providing such an air circulation hole, it is possible to more effectively suck the granular material adhering to the peripheral portion of the opening end face 16 and the contact surface 32 of the lid portion 31 .

Further, in the present embodiment, as shown in FIG. 2A, a stopper portion (displacement portion to be described later) 28 is provided to prevent downward movement of the upper end portion of the lid portion 31 at the standby position. and With such a configuration, when the lid portion 31 is displaced to the closing side, the lower end 31a of the lid portion 31 is prevented from being displaced toward the opening end surface 16 before the upper end 31b. It is possible to effectively suppress the biting of the granular material.
Further, in the present embodiment, as shown in FIGS. 2 and 3, the gap between the lower end 31a side of the lid portion 31 and the lower end 16a side of the opening end face 16 can be adjusted by moving the upper end 31b side of the lid portion 31 up and down. It has the structure which provided the clearance gap adjustment mechanism 26 which makes it. With such a configuration, when the suction force of the suction source 2 is excessive due to external conditions such as the capacity of the suction source 2, the transportation route, and the power supply frequency, the lower end 31a side of the lid portion 31 and the opening By adjusting the gap between the end face 16 and the lower end 16a side, the time until the lid portion 31 is closed can be lengthened. As a result, it is possible to effectively suck the granular material adhering to the periphery of the opening end face 16 and the lid portion 31 until the lid portion 31 is closed. On the other hand, when the suction force is too small, the gap between the lower end 31a side of the lid portion 31 and the lower end 16a side of the opening end face 16 is adjusted so as to reduce the closing failure of the lid portion 31. can do.

Further, in the present embodiment, the cover 30 is supported by the support shafts 23, 23 as described above. Since the lower end 31a side of the lid portion 31 is moved up and down in the opposite direction to the upper end 31b side as the 30 is rotated around the support shafts 23, 23, the gap can be adjusted with high accuracy.
Further, in the present embodiment, the clearance adjustment mechanism 26 is provided with an operation portion 27 positioned outside the cover portion 20 for displacing a displacement portion 28 for vertically moving the upper end 31 b side of the lid portion 31 . With such a configuration, the upper end 31b side of the lid portion 31 can be moved up and down by operating the operation portion 27 outside the cover portion 20, and the gap adjustment mechanism 26 can be adjusted by disassembling the cover portion 20 or the like. Workability can be improved compared to what needs to be done.

Further, in this embodiment, the operating portion 27 is provided along the outer surface of the rear wall portion 24 of the cover portion 20 so as to be vertically displaceable. is in contact with the lower surface side of the upper end portion of the lid portion 31 . With such a configuration, the gap between the lower end 31a side of the lid portion 31 and the lower end 16a side of the opening end surface 16 can be adjusted by vertically displacing the operating portion 27. For example, a cam-shaped displacement portion The clearance can be adjusted intuitively compared to the one provided with the operation part for rotating the . Also, when the lid portion 31 is in the open position, the lid portion 31 is positioned between the discharge pipe 15 and the operating portion 27 and the displacement portion 28 . As a result, for example, the displacement portion 28 is provided on the upper side of the upper end portion of the lid portion 31, or is provided so as to span in the first direction, the powder discharged from the discharge pipe 15 is reduced. Adhesion of the granular material to the displacement portion 28 and the like can be suppressed.

The operation portion 27 has a substantially plate shape arranged along the thickness direction (second direction) of the rear wall portion 24 . The gap adjustment mechanism 26 is provided with a fixing member 29 that fixes the vertical position of the operating portion 27 that has been adjusted vertically. In the illustrated example, the operating portion 27 is provided with an elongated hole 27a that penetrates in the thickness direction and has a long diameter in the vertical direction. is a bolt for fixing to the rear wall portion 24. FIG. Further, the figure shows an example in which the shaft portions of the two fixing members 29, 29 are inserted into the elongated hole 27a with a space therebetween in the vertical direction. The rear wall portion 24 is provided with female screw holes into which the shaft portions of the fixing members 29, 29 are screwed. The major diameter of the long hole 27a of the operation portion 27 may be set appropriately according to the desired adjustment width of the gap between the lower end 31a side of the lid portion 31 and the lower end 16a side of the opening end surface 16. The manner in which the vertically displaced operation portion 27 is fixed to the rear wall portion 24 is not limited to the fixing member 29 inserted through the long hole 27a as described above, and various other modifications are possible. It is possible.

The displacement portion 28 is provided to extend upward from the upper end portion of the operation portion 27 . In the present embodiment, the displacement portion 28 is configured to abut on the lower surface side of the upper end portion of the lid portion 31 arranged in the opening 25 provided in the rear wall portion 24, and the lid is in the standby position. It also functions as a stopper portion that prevents the upper end portion of the portion 31 from moving downward. As shown in FIG. 2, the opening 25 is provided through the rear wall portion 24 in the thickness direction, and has a substantially rectangular hole shape when viewed in the thickness direction of the rear wall portion 24 .
Further, the displacement portion 28 is provided on the upper end side of the operation portion 27 via a bent portion that is provided so as to bend from the upper end portion of the operation portion 27 toward the inside of the cover portion 20, and is vertically movable in the opening 25. It is configured to be displaced. The illustrated example shows an example in which the thickness dimension of the displacement portion 28 along the second direction is substantially the same as the thickness dimension of the rear wall portion 24 . A translucent cover or the like covering the upper portion of the opening 25 may be provided so as not to interfere with the operating portion 27 and the displacement portion 28 that are vertically displaced.
Further, the displacement portions 28 are arranged in a pair (forked shape) with an interval in the first direction. In other words, the two displacement portions 28, 28 are provided with an interval in the first direction.

If the operating portion 27 of the gap adjusting mechanism 26 configured as described above is set to the lower limit position as shown in FIG. At the position where the operation portion 27 is moved downward to the maximum extent, the displacement portion 28 and the upper end 31b of the lid portion 31 are also at their lower limit positions. At this lower limit position, the gap between the lower end 16a of the opening end face 16 and the lid portion 31 (the gap along the thickness direction of the lid portion 31) is minimized. In the illustrated example, the contact surface 32 of the lid portion 31 and the opening end surface 16 are substantially parallel at this lower limit position. That is, at this lower limit position, the gap between the opening end face 16 and the contact surface 32 of the lid portion 31 is substantially uniform over the entire circumference of the opening end face 16 . As long as the gap in this state is larger than the size of the granular material as described above, it may be about 1.1 to 5 times the size of the granular material, or may be 3 times or less, as described above. .

On the other hand, if the operation part 27 is set to the upper limit position as shown in FIG. At the position where the displacement portion 28 and the upper end 31b of the lid portion 31 are also moved to the maximum position by the upper limit position. At this upper limit position, the gap between the lower end 16a of the opening end face 16 and the lid portion 31 is maximized. The gap between the lower end 16a of the opening end face 16 and the lid portion 31 at the upper limit position may be about 1.5 to 5 times the same gap at the lower limit position, and the figure shows an example of about 2.5 times. ing.
At this upper limit position, the gap between the lower end 16 a of the opening end face 16 and the lid portion 31 is made larger than the gap between the upper end 16 b of the opening end face 16 and the lid portion 31 . Also, the gap between the upper end 16b of the opening end face 16 and the lid portion 31 is substantially the same at any position between the lower limit position and the upper limit position.

Further, in the present embodiment, the non-contact detector 6 is provided to detect the upper end portion of the lid portion 31 as the portion to be detected 31c. With such a configuration, it is possible to reduce the necessity of providing a material sensor for detecting the presence or absence of the granular material and a space therefor on the lower side of the discharge port 17, so that the vertical dimension can be made compact. can be done.
In addition, the non-contact detector 6 is vertically displaceable so that its position can be adjusted according to the upper end portion of the lid portion 31 that is vertically moved by the gap adjusting mechanism 26 . With such a configuration, the position of the non-contact detector 6 can be adjusted so as to correspond to the upper end portion of the lid portion 31 .

In this embodiment, the non-contact detector 6 is arranged so that the detection surface 7 faces from the outside of the rear wall portion 24 toward the rear wall portion 24 side. Further, the detection surface 7 is configured to detect the detected portion 31c of the lid portion 31 arranged in the opening 25 provided in the rear wall portion 24. As shown in FIG.
Further, the non-contact detector 6 detects (turns ON) the detected portion 31c if the detected portion 31c that contacts or separates from (approaches or separates from) the detection surface 7 exists within a predetermined detection area. , is configured to be in a non-detection (OFF) state when the detected portion 31c is outside the same detection area. In this embodiment, the non-contact detector 6 is configured to detect the detected portion 31c of the cover portion 31 at the standby position. That is, the detected portion 31c of the cover portion 31 at the standby position is closest to the detection surface 7 of the non-contact detector 6. As shown in FIG.

As such a non-contact detector 6, a proximity switch (sensor) such as an electromagnetic induction type, a capacitive type, an ultrasonic type, a photoelectric type, or the like may be adopted. The displacement portion 28 is bifurcated so as not to be detected by the non-contact detector 6 .
Further, the non-contact detector 6 is supported by an L-bracket-shaped support portion 8 provided on the cover portion 20 so as to be vertically adjustable. In the example shown in the figure, long holes 9 having long diameters are provided in the support portion 8 at the top and bottom, and the position of the non-contact detector 6 can be adjusted up and down along the long diameter direction of the long holes 9. However, it is not limited to such a mode.

The detected portion 31c of the lid portion 31 is provided at the upper end portion formed so that the central portion in the first direction of the upper end side portion of the lid portion 31 extends beyond both side portions thereof. Further, in the present embodiment, the detected portion 31c is configured as an inclined surface that is inclined with respect to the thickness direction of the lid portion 31 so as to be substantially vertical in the standby position. With such a configuration, the area of the detected portion 31c facing the detection surface 7 of the non-contact detector 6 can be effectively increased.
Further, in this embodiment, as shown in FIG. 2, a through hole 33 is provided in the upper end portion of the lid portion 31 so as to open below the detected portion 31c. The through hole 33 is provided so that the non-contact detector 6 does not detect the detected portion 31c of the lid portion 31 displaced from the standby position toward the open side. In the lid portion 31, at least the portion 31c to be detected by the non-contact detector 6 may be made of a conductor such as a metallic material. It may be formed.

In the collecting device 1 configured as described above, for example, the collection and discharge of the particulate material are performed as follows. The following basic operations are connected to the suction source 2 and the non-contact detector 6 via signal lines, etc., and each part is controlled by a control unit such as a CPU provided on the control panel and executed. .
As indicated by the solid line in FIG. 2(b), when the suction source 2 (see FIG. 1) is stopped and no particulate material is collected in the collector body 10, the lid 30 is on standby. In this state, the non-contact detector 6 is detecting the detected portion 31 c of the lid 30 . That is, in this state, the suction force of the suction source 2 and the load of the granular material are not acting on the cover 30, and the lid 30 is in an empty state, ie, a material demand state. If the non-contact detector 6 continues to detect the portion 31c to be detected until a predetermined delay time elapses, it may be determined that the material is required.

If it is determined that the material is required as described above, the suction source 2 is driven, and the inside of the collector body 10 becomes negative pressure, indicated by the two-dot chain line in FIG. 2(b) and the solid line in FIG. 4(b). As shown, the lid portion 31 of the lid body 30 is sucked from the standby position to the closed position, and the granular material is pneumatically transported from the transportation source 4 toward the collecting device 1 .
The pneumatically transported powdery or granular material is introduced into the collector main body 10 from the inlet 19 on the lower end side, and is flowed and diffused in the collector main body 10 by the upward air flow, and the powder particles Dust and the like contained in the body material are discharged out of the collector main body 10 through the suction connection pipe 12 together with the transportation air through the separation mechanism 13 . Further, when a plurality of types of powdery or granular materials are collected in the collection device 1, they flow and diffuse within the collection device body 10 and are mixed.

Then, for example, the suction source 2 is stopped after a predetermined transportation time has elapsed. As a result, in addition to its own weight, the load of the falling granule material acts on the lid 30 in the closed position, and as shown by the two-dot chain line in FIG. The cover 30 is pushed aside by the body material and rotated around the support shafts 23, 23 to the open position, and the discharge port 17 is opened. In other words, the lid body 30 moves from the closed position through the standby position to the open position by moving so to speak as if retreated by the falling granular material. As a result, the particulate material collected by the collecting device 1 is discharged. When the lid 30 is in the open position in this manner, the detected portion 31c of the lid 30 is out of the detection area of the non-contact detector 6, and the material is present.

Then, as the powder material is consumed (processed) at the supply destination, the material level is lowered, and the load of the powder material acting on the lid body 30 in the open position as described above becomes smaller or disappears. Then, the lid body 30 returns to the standby position by its own weight. As a result, the detected portion 31c of the lid 30 is within the detection area of the non-contact detector 6, and if the detection state continues until the predetermined delay time elapses, it is determined that the material is required, and suction is performed. The source 2 is driven to transport, collect, and discharge the granular material, and the same operations are repeated.
Note that the basic operation described above is merely an example, and various other modifications are possible. For example, a configuration in which the non-contact detector 6 is provided so as to detect the detected portion 31c at the open position, and when it is in the standby position, that is, when it is not detected, it is determined that the material is required. may be In this case, the position where the non-contact type detector 6 is provided, etc. may be appropriately modified.

Further, in the present embodiment, an example in which the non-contact detector 6 for detecting the detected portion 31c of the lid portion 31 is provided is shown. good. In this case, an appropriate level gauge or the like may be provided at an appropriate location such as the lower side of the collector main body 10 or the discharge pipe 15 .
Further, in the present embodiment, an example is shown in which the displacement portion 28 of the gap adjustment mechanism 26 is displaced so as to push up the upper end portion of the lid portion 31. It may be configured such that it is displaced so as to be pulled up. Further, although an example in which the displacement portion 28 is configured to be vertically displaced together with the vertically displaced operating portion 27 is shown, the present invention is not limited to such an aspect. For example, a cam-like portion may be provided as the displacement portion 28, which is provided on a shaft that rotates about an axis along the first direction and moves the upper end portion of the lid portion 31 up and down. The gap adjusting mechanism 26 for vertically moving the upper end 31b side of the lid portion 31 is not limited to the above mode, and various other modifications are possible. Furthermore, a configuration in which such a gap adjusting mechanism 26 is not provided may be adopted.

Further, in this embodiment, an example is shown in which a gap is formed over the entire circumference of the opening end face 16 between the lid portion 31 and the opening end face 16 at the standby position. A configuration in which a gap is formed at least between the lower end 16 a side and the lid portion 31 may be employed.
Further, in the present embodiment, an example in which at least the lower part of the inlet 19 is positioned at the same height as the upper part of the outlet 17 is shown, but the present invention is not limited to such an aspect. The entire introduction port 19 may be configured to open above the discharge port 17 . In addition, instead of opening the inlet 19 at the inner peripheral surface of the discharge pipe 15, the part of the collector body 10 having a substantially inverted conical shape, the part having a substantially cylindrical shape, or the upper end A mode or the like in which the inner peripheral surface of the lid body 11 or the like is opened may be employed. In addition, the introduction port 19 may be opened at the lower end of the introduction pipe 18 provided so as to hang down inside the collector main body 10 . The specific configuration of each member included in the collection device 1 according to this embodiment is not limited to the configuration described above, and various other modifications are possible.

REFERENCE SIGNS LIST 1 Granule material collecting device 15 Discharge pipe 16 Opening end face 23 Support shaft 28 Displacement portion (stopper portion)
30 lid body 31 lid portion 32 contact surface 34 held piece portion 35 bearing hole 37 lid portion side hole edge 38 upper side hole edge 39 lower side hole edge

Claims (5)

A discharge pipe having a lower open end face inclined with respect to the axial direction, and a closed position by being sucked from a standby position held with a gap provided between the discharge pipe and the open end face of the discharge pipe. A lid body having a flat plate-shaped lid portion, and the above-described lid portion above the lid portion in the closed position so as to be positioned on both sides in a first direction orthogonal to the inclination direction and the vertical direction of the opening end face of the discharge pipe. a pair of support shafts axially aligned in the first direction,
Bearing holes through which the pair of support shafts are respectively inserted are provided on both sides of the cover in the first direction. A collecting device for powdery or granular material, characterized in that the lid has an elongated hole shape extending generally in the thickness direction of the cover so that a gap larger than the powdery or granular material is formed between the lid. In claim 1,
Of the hole edges on both sides in the minor axis direction of the bearing hole, the upper hole edge facing the upper surface side of the support shaft is provided so as to extend in the thickness direction of the cover portion and faces the lower surface side of the support shaft. The lower hole edge is provided with an inclined portion that is inclined with respect to the upper hole edge so that the short diameter of the bearing hole is larger on the lid side than on the opposite lid side. A collection device for granular materials. In claim 1 or 2,
When the lid is in a natural state supported by the support shaft, the contact surface of the lid that contacts the opening end face is parallel to the opening end face, or the gap becomes larger as it goes downward. A collecting device for powdery or granular material, characterized in that: In any one of claims 1 to 3,
A particulate material collecting device, comprising: a stopper portion that prevents downward movement of the upper end portion of the cover portion that is in the standby position. In any one of claims 1 to 4,
The powder characterized in that the bearing holes on both sides in the first direction are provided in held piece portions integrally provided so as to extend in the thickness direction of the lid portion from both side portions in the first direction of the lid portion. Collecting device for granular material.

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